South Carolina stormwater management and sediment control handbook for land disturbance activities ; by the South Carolina Department of Health and Environmental Control

[From the U.S. Government Printing Office, www.gpo.gov]

SOUTH CAROLINA

STORMWATER MANAGEMENT

AND SEDIMENT CONTROL HANDBOOK

FOR LAND DISTURBANCE ACTIVITIES

JANUARY 1995

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TABLE OF CONTENTS

Page

I. Synopsis ....................................................................................1

H. Scope ................................. ...... ... .. .... ........................................................

mIi. Activities Requiring Permits ...............................................1......

IV. Permit Applicability........................................................................................... 1

V. Application Forms and Checklists ........................................................... 3

VI. Plan Submittal ......................................................... ....................................... 3

VII. NPDES General Permit Coverage .............................. 3

VIII. Construction Placard ................................................................................... 3

IX. Notification of Initiation of Land Disturbance Activity ................................................. 3

X. Request for Final Site Inspection ..... . ............................... ........................ 3

XI. Design Guidelines for Sediment Control .................................................................. 3

XII. Fees .....................................................4 .................... .................................. 4

XIII. Inspections............. ............. ;....................... 5

XIV. Violations and Enforcement ............................................... 5

XV. Sample Best Management Practices (BMPs) ................................ ............................ 5

Appendix A. South Carolina Stormwater Management and Sediment Reduction Regulations

Appendix B Coastal Zone Management Program Refinements for Stormwater Management

Appendix C. NPDES General Permit for Stormwater Discharges from Construction Activities

. Appendix D. Application Forms with Instructions and Submittal Check Lists

Appendix E. Sample Construction Placard

5: ~Appendix F. Notification of Initiation of Land Disturbance Activity and Request for Final Inspection

A{ i Appfdix G. Design Guidelines for Sediment Control
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Appendix H. Rainfall Data for South Carolina

Appendix I. Sample Stormwater Management and Sediment Reduction Best Management Practices

S. C. DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
STORMWATER MANAGEMENT AND SEDIMENT REDUCTION HANDBOOK

I. Synopsis:

This handbook is a compilation of existing South Carolina stormwater management regulations and
supporting information that applicants will need to proceed through the land disturbance permitting
process. The objective of this document is to create a comprehensive reference for individuals who will
be submitting a stormwater management and sediment reduction permit application for approval to the
Department of Health and Environmental Control (DHEC). This handbook summarizes the application
process and sets forth the minimum standards and design specifications for land disturbing activities
that require stormwater permits. The supporting information includes application forms, checklists,
sediment control design aids and other useful information. This document references pertinent sections
from the S. C. Stormwater Management and Sediment Reduction regulations, the NPDES Permits for
Stormwater Discharges from Construction Activities (General and Individual permits) and the Coastal
Zone Management Program Refinements which are included as appendices.

II. Scope:

A stormwater management plan in compliance with the requirements of existing regulations must be
submitted for most land disturbing activities in South Carolina. Appendix A contains a copy of the
S. C. Stormwater Management and Sediment Reduction regulations. The DHEC Office of Ocean and
Coastal Resource Management (OCRM), formerly the S. C. Coastal Council, administers the
stormwater management program in the following eight coastal counties: Beaufort, Berkeley,
Charleston, Colleton, Dorchester, Georgetown, Horry, and Jasper. The stormwater permitting
program for the rest of the state is implemented by DHEC's Bureau of Water Pollution Control, which
now includes parts of the former Land Resources Conservation Commission.

III. Activities Requiring Permits:

Currently all land disturbing activities of two (2) acres or greater in the thirty-one (31) most populace
counties in the state require a stormwater management permit prior to construction (see Section 72-303
of Appendix A). Land disturbing activities in the other fifteen counties presently require permitting for
five (5) acres or greater of disturbance which will drop to two (2) acres on July 1, 1995. In the Coastal
counties, if the activity is within one-half (1/2) mile of a receiving waterbody, projects disturbing less
than two (2) acres may require a permit depending on the type of project (see next section). Land
disturbances of five (5) acres or greater require NPDES construction permits regardless of the location
of the activity.

IV. Permit Applicability:

Specific requirements of the permit application and approval process are based on the amount of actual
land disturbance and, if the activity is in the Coastal Zone, the project's proximity to a receiving
waterbody. The permit application procedure is as follows:

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(1) For activities involving two (2) acres or less of actual land disturbance and which
are not part of a larger common plan of development or sale, the person responsible for
the activity shall submit a simplified stormwater management and sediment control plan
meeting the requirements of R.72-307H in Appendix A and the reporting form found in
Appendix D. This plan does not require approval by the Department of Health and
Environmental Control and does IQt require preparation or certification by a registered
engineer, landscape architect, or Tier B land surveyor. The DHEC staff does have the
authority to conduct site inspections on these projects to insure compliance with the
submitted plans.

(2) For activities involving two (2) acres or less of actual land disturbance which are
within one-half (1/2) mile of a receiving waterbody in the Coastal Zone. The
Coastal Zone Management Program Refinements (Appendix B) state that "stormwater
management and sediment reduction plan submittal and regulatory approval shall be
required for those smaller projects located within 1/2 mile of a receiving waterbody."
Particular emphasis shall be placed on the following projects in this category:

(a) All commercial buildings which will handle hazardous chemicals
(including gasoline, kerosene, diesel fuel, nutrients, etc.).
(b) All commercial buildings and parking/runway areas with greater than one (1)
acre of impervious surface (building and parking).
(c) All commercial buildings and parking/runway areas with greater than one-half
(1/2) acre of impervious surface located directly adjacent to a saltwater
(critical) area.
(d) All residential subdivision developments located directly adjacent to a saltwater
(critical) area.
(e) All projects impacting Geographical Areas Of Particular Concern (GAPC's).

These activities (a-e) must meet the requirements of R.72-307I in Appendix A and must have
the plans and specifications prepared by a registered engineer, landscape architect or Tier B land
surveyor. Other activities in this category require a permit but must only meet the submittal
requirements of R.72-307H which do not require preparation by a licensed professional.

(3) For activities involving more than two (2) acres and less than five (5) acres of
actual land disturbance which are not part of a larger common plan of development
or sale, a simplified permitting approval process will be used meeting the requirements
of R.72-307I in Appendix A. Plans and specifications for these activities will be
prepared by professional engineers, landscape architects or tier B land surveyors.

(4) For activities involving more than five (5) acres of actual land disturbance, the
requirements of R.72-305 and R.72-307 from Appendix A and requirements of General
Permit SCR100,000 in Appendix C apply. Plans and specifications for these activities
will be prepared by professional engineers, landscape architects or Tier B land
surveyors.

Additional design requirements for certain projects in the Coastal Zone as adopted in the Coastal Zone
Management Program Refinements are contained in Appendix B. These requirements address design
needs for activities located in close proximity to receiving waterbodies, bridge projects, golf courses,
mines and landfills.

V. Application Forms and Checklists:

Appendix D contains all the necessary application forms and checklists to use in a stormwater
management and sediment reduction permit submittal package.

VI. Plan Submittal:

The responsible agent should do a preliminary analysis to determine which of the different categories a
project would fall under and then submit the appropriate application form and information required on
the checklist. The initial submittal package should include only one (1) paper copy of the stormwater
management and sediment reduction plans and corresponding calculations. After the plans have been
reviewed to determine compliance with the regulations, the DHEC plan reviewer will contact the
applicant/engineer and request necessary changes or notify the individual that the plans are in
compliance. When the plans have been determined to be in compliance then the applicant/engineer
shall send either four (4) additional paper copies or one (1) mylar copy for stamp approval. One copy
of the plans is for the engineer/agent, one is for the owner, one is for the contractor and must be
available onsite at all times and one copy is for the DHEC inspector.

VII. NPDES General Permit Coverage:

Any construction project disturbing five (5) acres or greater must obtain either NPDES general permit
coverage or an individual NPDES permit. NPDES General Permit coverage under SCR100,000 can
be obtained by the above referenced submittal information including application form # 3306
(9/94), plans and specifications. Therefore, application form:# 3306 (9/94) shall serve as the
Notice Of Intent (NOI) for NPDES general permit coverage for most land disturbance activities.

If a project has a disturbed acreage of five (5) acres or more and is exempt from the requirements of
Title 48 Chapter 14 by Section 40 and by R.72-302 but not exempt from the requirements of
SCR100,000 pursuant to Regulation 61-9, then the EPA Notice of Intent (NOI) found in Appendix D
must be submitted. Filing this form guarantees that a Pollution Prevention Plan (PPP) has been
developed and will be maintained on site.

The S. C. Department of Transportation (SCDOT) must comply with SCR100,000 pursuant to
Regulation 61-9 and Regulation 72-400. All Department of Transportation projects are required to file
the EPA Notice of Intent (NOI) form at least 48 hours prior to start of construction. A copy of the
plans developed in compliance with R.72-400 must be submitted at the time the contract is awarded.

VIII. Construction Placard:

A land disturbance permit construction placard will be sent out with the permit letter. This placard
should be posted at the site at the beginning of a land disturbance activity. A sample placard is in
Appendix E.

IX. Notification of Initiation of Land Disturbance Activity

Appendix F contains a sample letter which should be sent to the appropriate DHEC plan reviewer with
a carbon copy to the local DHEC District office prior to initiation of the land disturbance activity. A
list of the DHEC District offices and their addresses is included in Appendix F.

X. Request for Final Site Inspection

Appendix F also has a sample letter which can be sent to the appropriate DHEC contact requesting a
final site inspection.

XI. Design Guidelines For Sediment/Erosion Control

The stormwater management regulations require that when stormwater runoff drains to a single outlet
from land disturbing activities which disturb ten (10) acres or more then a sediment basin must be
designed to meet a removal efficiency of 80 percent for suspended solids or 0.5 ML/L peak settable
concentration, which ever is less. The efficiency shall be calculated for disturbed conditions for the 10-
year 24-hour design event. There are computer software packages available that can be used to
calculate the removal efficiencies of certain sediment control practices. In addition, Appendix G
contains a report titled "Engineering Aids and Design Guidelines for Control of Sediment in South
Carolina" which can be referenced when calculating sediment removal efficiencies.

Activities that have between five (5) and ten (10) acres of land disturbance area draining to a single
outlet may incorporate other practices besides a sediment basin to achieve the equivalent removal
efficiency of 80 percent for suspended solids or 0.5 ML/L peak settable solids concentration. Specific
site conditions and/or topography may eliminate the need for removal efficiency calculations.
Construction activities that disturb less than five (5) acres do not require sediment calculations but the
design of these projects must include sediment control best management practices during construction.

XII. Rainfall Data for South Carolina

Appendix H contains rainfall data and rainfall-erosivity factors (R factors) for all South Carolina
counties to be used in hydrology and sedimentology calculations. Additional information such as the
eroded particle size distributions for all South Carolina soils can be obtained from DHEC upon request.

XIII. Fees:

A fee of fifty (50) dollars per disturbed acre up to a maximum of $1000 is required for all land
disturbance activities of two (2) or more acres. There is no fee charged for government activities
(local, state, and federal) or for projects that disturb less than two (2) acres. An application for a
waiver or a variance must include a $100 fee. In order to estimate the area of land disturbance for
subdivisions without exact build out plans, use the following formula:

Amount of Disturbance = 2[Max Restricted Building Size][Number of Lots] + ROW areas
Right of Way (ROW) areas include clearing for roads, utilities, easements etc.

XIV. Inspections:

The DHEC staff will conduct periodic site inspections on all land disturbing activities. The person
responsible for the land disturbing activity shall notify the appropriate inspection agency before
initiation of construction and upon project completion when a final inspection will be conducted to
ensure compliance with the approved stormwater management and sediment control plan. DHEC or
any other responsible inspection agency shall, for inspection purposes, do all of the following items:

(1) Ensure that the approved stormwater management and sediment control plans are on
the project site and are complied with;

(2) Ensure that every active site is inspected for compliance with the approved plan on a
regular basis;

(3) Provide the person responsible for the land disturbing activity a written report after
every inspection.

(4) Notify the person responsible for the land disturbing activity in writing when violations
are observed, describing the:

i(a) Nature of the violation;
(b) Required corrective action; and
(c) Time period for violation correction.

XV. Violations and Enforcement:

Violations of the stormwater regulations will occur when (a) a site with an approved stormwater permit
is not in compliance with the issued permit or (b) a land disturbing activity is underway and the agent
has not acquired the necessary permit. Enforcement procedures will vary according to the severity of
the violation but might include imposing fines or issuing cease and desist orders. Violations of the S.
C. Pollution Control Act as prescribed by SCR100,000 pursuant to Regulation 61-9 may subject the
applicant to a civil penalty of up to $10,000 per violation per day. Additional information on
enforcement procedures is contained in Section 72-312 of Appendix A.

XVI. Best Management Practices (BMPs):

Appendix I contains a table and illustrations of some of the stormwater management and sediment
reduction best management practices (BMPs) used in South Carolina. The existing conditions
determined from site surveys will aid in selecting the most effective BMPs to use when designing a plan
for permit submittal. Included in the BMP section is a sample subdivision lot detail (Figure 11) that
can be used to illustrate the necessary sediment control practices that a contractor for an individual
home site in a subdivision may have to incorporate. Additional methods of stormwater management
and sediment control can be found in "A Guide to Site Development and Best Management Practices
for Stormwater Management and Sediment Control" distributed by DHEC.

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APPENDIX A

S. C. STORMWATER MANAGEMENT AND

SEDIMENT REDUCTION REGULATIONS

FINAL REGULATIONS

LAND RESOURCES CONSERVATION COMMISSION

CHAPTER 72
Statutory Authority: 1976 Code, Title 48, Chapter 14

72-300 Standards for Stormwater Management and Sediment Reduction
Synopsis:
These proposed regulations pursuant to the Stormwater Management and Sediment Reduction Act of
1991 establish the procedure and minimum standards for a statewide uniform program for stormwater
management and sediment reduction with the option of being operated locally. The regulations
establish the procedure for local governments or conservation districts to apply for program component
delegation. They also establish the criteria to be met for delegation. Minimum standards and
specifications are established for land disturbing activities that require a permit.
The proposed regulations encourage management of stormwater and sediment on a watershed basis.
Criteria and procedures are established for designating watersheds and creating stormwater utilities.
When the law becomes effective, it will be implemented in a phased approach as listed in the
regulations.
Instructions:
New regulations added.
Text:
72-300. Scope.
72-301. Definitions.
72-302. Exemptions, Waivers and Variances from Law.
72-303. Commission Responsibilities.
72-304. Criteria for Delegation/Revocation of Programs.
72-305. Permit Application and Approval Process.
72-306. Fees.
72-307. Specific Design Criteria, Minimum Standards and Specifications.
72-308. Maintenance Requirements and Off-Site Damage Correction.
72-309. Criteria for Designated Watersheds.
72-310. Criteria for Implementation of a Stormwater Utility.V
72-311. Plan Review and Inspector Certification Program.
72-312. Review and Enforcement Requirements.
72-313. Hearings and Hearings Procedures.
72-314. Citizen Complaint Procedure on Delegated Program Components and Individual Sites.
72-315. Penalties.
72-316. Severability.

72-300. Scope.
A. Stormwater runoff is a source of pollution of waters of the State, and may add to existing
flooding problems. The implementation of a statewide stormwater management and sediment
control program will help prevent additional water quantity and quality problems and may
reduce existing problems.
B. Stormwater management and sediment control plan approvals are necessary prior to engaging
in any land disturbing activity related to residential, commercial, industrial or institutional land
use which are not specifically exempted or waived by these regulations.
C. To the extent possible, the Commission intends to delegate the provisions of these regulations
to local governments. Those program provisions which are subject to delegation include
stormwater management and sediment control plan approval, construction and maintenance
inspections, enforcement, and education and training.
D. The Commission encourages the implementation of the Stormwater Management and Sediment
Reduction Act on a watershed basis by local governments. The Commission recognizes that all
jurisdictions may not have the resources available to implement this type of program
immediately. However, the comprehensive approach of implementing the program on the
watershed basis will allow for planned, orderly development in a watershed.
E. The implementation of a stormwater utility represents a comprehensive approach to program
funding and implementation. The activities which may be undertaken by a stormwater utility
include not only assessment, collection, and funding activities, but also carrying out provisions
of adopted stormwater management plans. These provisions may include contracting for such
services as project construction, project maintenance, project inspection, and enforcement of
installation and maintenance requirements imposed with respect to approved land disturbing
activities.

72-301. Definitions.
As used in these regulations, the following terms shall have the meanings indicated below:
1. "Adverse Impact" means a significant negative impact to land, water and associated resources
resulting from a land disturbing activity. The negative impact includes increased risk of
flooding; degradation of water quality; increased sedimentation; reduced groundwater recharge;
negative impacts on aquatic organisms; negative impacts on wildlife and other resources; and
threatened public health.
2. "Applicant" means a person, firm, or governmental agency who executes the necessary forms
to obtain approval or a permit for a land disturbing activity.
3. "Appropriate Plan Approval Agency" means the Commission, Local Government, or
Conservation District that is responsible in a jurisdiction for review and approval of stormwater
management and sediment control plans.
4. "As-Built Plans or Record Documents" means a set of engineering or site drawings that
delineate the specific permitted stormwater management facility as actually constructed.
5. "Best Management Practices" means a wide range of management procedures, schedules of
activities, prohibitions on practices and other management practices which have been
demonstrated to effectively control the quality and/or quantity of stormwater runoff and which
are compatible with the planned land use.
6. "Certified Construction Inspector" means a person with the responsibility for conducting
inspections during construction and maintenance inspections after the land disturbing activity is
completed as certified by the Commission.

7. "Certified Plan Reviewer" means a person with the responsibility for reviewing stormwater
management and sediment control plans for an appropriate plan approval agency as certified by
the Commission.
8. "Commission" means the South Carolina Land Resources Conservation Commission.
9. "Delegation" means the acceptance of responsibility by a Local Government or Conservation
District for the implementation of one or more elements of the statewide stormwater
management and sediment control program.
10. "Designated Watershed" means a watershed designated by a local government and approved by
the Commission, Department of Health and Environmental Control and the South Carolina
Water Resources Commission and identified as having an existing or potential stormwater,
sediment control, or nonpoint source pollution problem.
11. "Detention Structure" means a permanent stormwater management structure whose primary
purpose is to temporarily store stormwater runoff and release the stored runoff at controlled
rates.
12. "Develop Land" means to change the runoff characteristics of a parcel of land in conjunction
with residential, commercial, industrial, or institutional construction or alteration.
13. "Developer" means a person undertaking, or for whose benefit, activities covered by these
regulations are commenced and/or carried out.
14. "District" means any soil and water conservation district created pursuant to Chapter 9, Title
48, S.C. Code of Laws.
15. "Drainage Area" means that area contributing runoff to a single point.
16. "Easement" means a grant or reservation by the owner of land for the use of such land by
others for a specific purpose or purposes, and which must be included in the conveyance of
land affected by such easement.
17. "Erosion" means the wearing away of land surface by the action of wind, water, gravity, ice,
or any combination of those forces.
18. "Erosion and Sediment Control" means the control of solid material, both mineral and organic,
during a land disturbing activity to prevent its transport out of the disturbed area by means of
air, water, gravity, or ice.
19. "Exemption" means those land disturbing activities that are not subject to the sediment and
stormwater requirements contained in these regulations.
20. "Grading" means excavating, filling (including hydraulic fill) or stockpiling of earth material,
or any combination thereof, including the land in its excavated or filled condition.
21. "Implementing Agency" means the Commission, local government, or conservation district
.with the responsibility for receiving stormwater management and sediment control plans for
review and approval, reviewing plans, issuing permits for land disturbing activities, or
conducting inspections and enforcement actions in a specified jurisdiction.
22. "Infiltration" means the passage or movement of water through the soil profile.
23. "Land Disturbing Activity" means any use of the land by any person that results in a change in
the natural cover or topography that may cause erosion and contribute to sediment and alter the
quality and quantity of stormwater runoff.
24. "Natural Waterways" means waterways that are part of the natural topography. They usually
maintain a continuous or seasonal flow during the year and are characterized as being irregular
in cross-section with a meandering course. Construction channels such as drainage ditches
shall not be considered natural waterways.
25. "Nonerodible" means a material, e.g., natural rock, riprap, concrete, plastic, etc., that will not
experience surface wear due to natural forces of wind, water ice, gravity or a combination of
those forces.

26. "Local Government" means any county, municipality, or any combination of counties or
municipalities, acting through a joint program pursuant to the provisions of this chapter.
27. "Nonpoint Source Pollution" means pollution contained in stormwater runoff from ill-defined,
diffuse sources.
28. "One Hundred Year Frequency Storm" means a storm that is capable of producing rainfall
expected to be equaled or exceeded on the average of once in 100 years. It also may be
expressed as an exceedence probability with a 1 percent chance of being equaled or exceeded
in any given year.
29. "Person" means any State or federal agency, individual, partnership, firm, association, joint
venture, public or private corporation, trust, estate, commission, board, public or private
institution, utility, cooperative, municipality or other political subdivision of this State, any
interstate body or any other legal entity.
30. "Person Responsible for the Land Disturbing Activity" means
(a) the person who has or represents having financial or operational control over the land
disturbing activity; and/or
(b) the landowner or person in possession or control of the land who directly or indirectly
allowed the land disturbing activity or has benefitted from it or who has failed to comply
with any provision of the act, these regulations, or any order or local ordinance adopted
pursuant to this act as imposes a duty upon him.
31. "Post-Development" means the conditions which exist following the completion of the land
disturbing activity in terms of topography, vegetation, land use and rate, volume or direction
stormwater runoff.
32. "Pre-Development" means the conditions which existed prior to the initiation of the land
disturbing activity in terms of topography, vegetation, land use and rate, volume or direction of
stormwater runoff.
33. "Redevelopment" means a land disturbance activity that alters the current use of the land but
does not necessarily alter the pre-development runoff characteristics.
34. "Responsible Personnel" means any foreman, superintendent, or similar individual who is the
on-site person in charge of land disturbing activities.
35. "Retention Structure" means a permanent structure whose primary purpose is to permanently
store a given volume of stormwater runoff. Release of the given volume is by infiltration
and/or evaporation.
36. "Sediment" means solid particulate matter, both mineral and organic, that has been or is being
transported by water, air, ice, or gravity from its site of origin.
37. "Single Family Residence-Separately Built" means a noncommercial dwelling that is occupied
exclusively by one family and not part of a residential subdivision development.
38. "Stabilization" means the installation of vegetative or structural measures to establish a soil
cover to reduce soil erosion by stormwater runoff, wind, ice and gravity.
39. "Stop Work Order" means an order directing the person responsible for the land disturbing
activity to cease and desist all or any portion of the work which violates the provisions of this
act.
40. "Stormwater Management" means, for:
(a) quantitative control, a system of vegetative or structural measures, or both, that control the
increased volume and rate of stormwater runoff caused by manmade changes to the land;
(b) qualitative control, a system of vegetative, structural, or other measures that reduce or
eliminate pollutants that might otherwise be carried by stormwater runoff.
41. "Stormwater Management and Sediment Control Plan" means a set of drawings, other
documents, and supporting calculations submitted by a person as a prerequisite to obtaining a

permit to undertake a land disturbing activity, which contains all of the information and
specifications required by an implementing agency.
42. "Stormwater Runoff' means direct response of a watershed to precipitation and includes the
surface and subsurface runoff that enters a ditch, stream, storm sewer or other concentrated
flow during and following the precipitation.
43. "Stormwater Utility" means an administrative organization that has been created for the
purposes of planning, designing, constructing, and maintaining stormwater management,
sediment control and flood control programs and projects.
44. "Subdivision", unless otherwise defined in an ordinance adopted by a local government
pursuant to Section 6-7-1010, means all divisions of a tract or parcel of land into two or more
lots, building sites, or other divisions, or parcels less than five acres, for the purpose, whether
immediate or future, of sale, legacy, or building development, or includes all division of land
involving a new street or a change in existing streets, and includes resubdivision and, where
appropriate, in the context, shall relate to the process of subdividing or to the land or area
subdivided.
45. "Swale" means a structural measure with a lining of grass, riprap or other materials which can
function as a detention structure and convey stormwater runoff without causing erosion.
46. "Ten-Year Frequency Storm" means a storm that is capable of producing rainfall expected to
be equaled or exceeded on the average of once in 10 years. It may also be expressed as an
exceedence probability with a 10 percent chance of being equaled or exceeded in any given
year.
47. "Twenty-Five Year Frequency Storm" means a storm that is capable of producing rainfall
expected to be equaled or exceeded on the average of once in 25 years. It also may be
expressed as an exceedence probability with a 4 percent chance of being equaled or exceeded
in any given year.
48. "Two-Year Frequency Storm" means a storm that is capable of producing rainfall expected to
be equaled or exceeded on the average of once in two years. It may also be expressed as an
exceedence probability with a 50 percent chance of being equaled or exceeded in any given
year.
49. "Variance" means the modification of the minimum sediment and stormwater management
requirements for specific circumstances where strict adherence of the requirements would result
in unnecessary hardship and not fulfill the intent of these regulations.
50. "Waiver" means the relinquishment from sediment and stormwater management requirements
by the appropriate plan approval authority for a specific land disturbing activity on a case-by-
case review basis.
51. "Water Quality" means those characteristics of stormwater runoff from a land disturbing
activity that relate to the physical, chemical, biological, or radiological integrity of water.
52. "Water Quantity" means those characteristics of stormwater runoff that relate to the rate and
volume of the stormwater runoff to downstream areas resulting from land disturbing activities.
53. "Watershed" means the drainage area contributing stormwater runoff to a single point.
54. "Watershed Master Plan" means a plan for a designated watershed that analyzes the impact of
existing and future land uses and land disturbing activities in the entire watershed and includes
strategies to reduce nonpoint source pollution, to manage stormwater runoff and control
flooding. The plan must be developed for the entire watershed, regardless of political
boundaries, and must include appropriate physical, institutional, economic and administrative
data needed to justify the plan.

72-302. Exemptions, Waivers, and Variances From Law.
A. The following activities are exempt from both the sediment control and stormwater
management requirements established by these regulations:
(1) Land disturbing activities on agricultural land for production of plants and animals
useful to man, including but not limited to: forages and sod crops, grains and feed crops,
tobacco, cotton, and peanuts; dairy animals and dairy products; poultry and poultry
products; livestock, including beef cattle, sheep, swine, horses, ponies, mules, or goats,
including the breeding and grazing of these animals; bees; fur animals and aquaculture,
except that the construction of an agricultural structure of one or more acres, such as
broiler houses, machine sheds, repair shops and other major buildings and which require
the issuance of a building permit shall require the submittal and approval of a stormwater
management and sediment control plan prior to the start of the land disturbing activity.
(2) Land disturbing activities undertaken on forest land for the production and harvesting
of timber and timber products.
(3) Activities undertaken by persons who are otherwise regulated by the provisions of
Chapter 20 of Title 48, the South Carolina Mining Act.
(4) Construction or improvement of single family residences or their accessory buildings
which are separately built and not part of multiple construction in a subdivision
development.
(5) Land disturbing activities, other than activities identified in R.72-302A(6), that are
conducted under another state or federal environmental permitting, licensing, or
certification program where the state or federal environmental permit, license, or
certification is conditioned on compliance with the minimum standards and criteria
developed under this act.
(6) Any of the following land disturbing activities undertaken by any person who provides
gas, electrification, or communications services, subject to the jurisdiction of the South
Carolina Public Service Commission, or corporations organized and operating pursuant to
Section 33-49-10 et seq.:
(a) land disturbing activities conducted pursuant to a certificate of environmental
compatibility and public convenience and necessity issued pursuant to Title 58, Chapter
33, of the South Carolina Code, or land disturbing activities conducted pursuant to any
other certification or authorization issued by the Public Service Commission;
(b) land disturbing activities conducted pursuant to a federal environmental permit,
including Section 404 of the Federal Clean Water Act, and including permits issued by
the Federal Energy Regulatory Commission;
(c) land disturbing activities associated with emergency maintenance or construction of
electric, gas, or communications facilities, when necessary to restore service or when
the Governor declares the area to have sustained a disaster and the actions are
undertaken to protect the public from a threat to health or safety;
(d) land disturbing activities associated with routine maintenance and/or repair of electric,
gas, or communications lines;
(e) land disturbing activities associated with the placement'of poles for overhead
distribution or transmission of electric energy or of communications services;
(f) land disturbing activities associated with placement of underground lines for
distribution or transmission of electric energy or of gas or communications services; or
(g) land disturbing activities conducted by a person filing environmental reports,
assessments or impact statements with the United States Department of Agriculture,
Rural Electrification Administration in regard to a project.

Any person, other than a person identified in R.72-302A(6)(g) who undertakes land disturbing activities
described in R.72-302A(6)(d,e,f) must file with the South Carolina Public Service Commission, in a
Policy and Procedures Manual, the procedures it will follow in conducting such activities. Any person,
other than a person identified in R.72-302A(6)(g), who conducts land disturbing activities described in
R.72-302A(6)(b), must address the procedures it will follow in conducting the activities in the Policy
and Procedures Manual filed with the South Carolina Public Service Commission to the extent that the
land disturbing activities are not specifically addressed in the federal permit or permitting process. If
any person, other than a person identified in R.72-302A(6)(g), does not have a Policy and Procedures
Manual on file with the Public Service Commission, such manual must be filed with the Public Service
Commission not later than six months after the effective date of Chapter 14, Title 48 of the 1976 Code
of Laws, South Carolina.
Any person who undertakes land disturbing activities described in R.72-302A(6)(g) of this subsection
shall give the same written notice to the commission as given to agencies whose permits are required
for project approval by the regulations of the United States Department of Agriculture, Rural
Electrification Administration.
(7) Activities relating to the routine maintenance and/or repair or rebuilding of the tracks, rights-
of-way, bridges, communication facilities and other related structures and facilities of a railroad
company.
(8) Activities undertaken on state-owned or managed lands that are otherwise regulated by the
provisions of Chapter 18 of this title, the Erosion and Sediment Reduction Act.
(9) Activities undertaken by local governments or special purpose or public service districts
relating to the repair and maintenance of existing facilities and structures.

B. Implementing agencies with responsibility for plan review and approval may grant waivers
from the stormwater management requirements of these regulations for individual land
disturbing activities provided that a written request is submitted by the applicant containing
descriptions, drawings, and any other information that is necessary to evaluate the proposed
land disturbing activity. A separate written waiver request shall be required if there are
subsequent additions, extensions, or modifications which would alter the approved stormwater
runoff characteristics to a land disturbing activity receiving a waiver.
(1) A project may be eligible for a waiver of stormwater management for both quantitative
and qualitative control if the applicant can demonstrate that the proposed project will return
the disturbed area to a pre-development runoff condition and the pre-development land use
is unchanged at the conclusion of the project.
(2) A project may be eligible for a waiver or variance of stormwater management for water
quantity control if the applicant can demonstrate that:
(a) The proposed project will have no significant adverse impact on the receiving natural
waterway or downstream properties; or
(b) The imposition of peak control requirements for rates of stormwater runoff would
aggravate downstream flooding.
(3) The implementing agency will conduct its review of the request for waiver within 10
working days. Failure of the implementing agency to act by end of the tenth working day
will result in the automatic approval of the waiver.

C. The implementing agency with responsibility for plan review and approval may grant a written
variance from any requirement of these regulations if there are exceptional circumstances
applicable to the site such that strict adherence to the provisions of these regulations will result
in unnecessary hardship and not fulfill the intent of these regulations. A written request for

variance shall be provided to the plan approval agency and shall state the specific variances
sought and the reasons with supporting data for their granting. The plan approval agency shall
not grant a variance unless and until sufficient specific reasons justifying the variance are
provided by the applicant. The implementing agency will conduct its review of the request for
variance within 10 working days. Failure of the implementing agency to act by the end of the
tenth working day will result in the automatic approval of the variance.

72-303. Commission Responsibilities.
A. The Commission is responsible for the implementation and supervision of the stormwater
management and sediment control program which is established by Chapter 14, Title 48, S.C.
Code.
B. The schedule for implementing the Stormwater Management and Sediment Control Act (48-14-
10, et. seq.) has been established by the Commission as follows:
(1) These regulations are effective and applicable to all land disturbing activities of five
acres and greater on October 1, 1992 regardless of program status at the local level. Local
governments with existing local programs as of this date shall require that persons
responsible for land disturbing activities on sites with disturbed areas of five acres or
greater comply with these regulations. Local governments may request assistance from the
Commission to implement these regulations on these sites. If a local government does not
have a local program on October 1, 1992, the Commission and others shall function as the
implementing agencies.

(2) FY 1992-1993
Greenville
Charleston
Richland
Spartanburg
Lexington
Anderson
Horry
York
Berkeley
Aiken
Florence
Sumter
Pickens
Beaufort
Orangeburg

(3) FY 1993-1994
Dorchester
Darlington
Greenwood
Laurens
Oconee
Lancaster
Georgetown
Cherokee-

Kershaw
Chesterfield
Williamsburg
Colleton
Marion
Newberry
Chester
Union

(4) FY 1994-1995
Marlboro
Dillon
Clarendon
Abbeville
Fairfield
Barnwell
Lee
Edgefield
Hampton
Bamberg
Saluda
Jasper
Calhoun
Allendale
McCormick

C. This schedule may be modified by the Commission due to requests from local governments to
develop and implement a program prior to the scheduled implementation date. The
Commission may also modify this schedule due to personnel or financial resource limitations.
D. Local governments which adopted stormwater management and/or sediment control programs
prior to the effective date of these regulations may continue to administer the existing program
until the scheduled implementation date for the local government.

72-304. Criteria for Delegation/Revocation of Program Elements.
A. The Commission may delegate the following components of stormwater management and
sediment control programs to local governments or conservation districts as follows:
(1) Stormwater management and sediment control plan review and approval/disapproval.
(2) Inspections during construction and maintenance inspections.
(3) Enforcement.
(4) Education and training.
B. The Commission shall grant delegation of one or more program elements to any local
government or conservation district seeking delegation that is found capable and meets all of
the criteria set forth herein for delegation to comply with Chapter 48, Title 14, 1976 Code and
these regulations.
C. Request for delegation of more than one program element may be accomplished by the
submission of one request for all the elements requested. A rejection by the Commission of
one element will not jeopardize delegation of other requested program elements.

D. To be considered capable of providing compliance with Chapter 14 and these regulations,
applications for delegation of program elements shall contain the following requisite items:
(1) Requests for delegation of stormwater management and sediment control plan review and
approval responsibility shall include the following information:
(a) Copy of enacted ordinance or program information detailing the plan approval process,
(b) Plan review check lists and plan submission requirements,
(c) Stormwater management and sediment control criteria, including waiver and variance
procedures, that meet minimum standards established by these regulations,
(d) Description of personnel allocations including qualifications and experience of
personnel, description of computer hardware and software resources and expected time
frames for plan review which meet the requirements of R.72-305B(2) and R.72-305M,
and
(e) Name of the Certified Plan Reviewer.
(2) Requests for delegation of inspection during construction and of maintenance inspection
responsibility shall include the following information:
(a) Inspection and referral procedures,
(b) Time frames for inspection of active land disturbing activities,
(c) Time frames for inspection of completed stormwater management structures,
(d) Inspection forms,
(e) Description of adequate personnel allocations including qualifications and experience of
personnel,
(f) Name of Certified Construction Inspector, and
(g) Procedures and time frames for processing complaints.
(3) Request for delegation of enforcement responsibility shall include the following
information:
(a) Procedure for processing violations.
(b) Description of personnel allocations involved in enforcement actions including
qualifications and experience of personnel.
(c) Description of citizen complaint process.
(d) Description of applicant appeal process.
(4) Requests for delegation of education and training responsibility shall include the following
information:
(a) Types of educational and training activities to be accomplished,
(b) Frequency of activities,
(c) Names and backgrounds of those individuals conducting the training, and
(d) Procedures and timetables to notify the Commission of educational programs.

E. Requests for delegation of program elements must be submitted by local governments or
conservation districts within six months of the effective date of these regulations, and by
January first of subsequent years if delegation is desired at a future date. The Commission
shall approve, approve with modification, or deny such a request on Or before April first of the
year for which delegation is sought.
F. The S.C. Coastal Council shall assist the Commission in reviewing all requests for delegation
of program elements from local governments in the counties of Beaufort, Berkeley, Charleston,
Colleton, Dorchester, Georgetown, Jasper and Horry to ensure that the delegated program
elements are consistent with the Coastal Zone Management Program. The S.C. Coastal
Council, in coordination with the Commission, will serve as the implementing agency for these
regulations in the jurisdictions of the local governments which do not seek delegation of

program elements in the counties of Beaufort, Berkeley, Charleston, Colleton, Dorchester,
Georgetown, Horry and Jasper.
G. If the Commission denies a request for delegation, the local government or conservation district
may appeal the decision of the Commission by requesting an administrative hearing within 30
days after receipt of written notification as described in R.72-313.
H. Delegation of authority for one or more program elements may be granted for a maximum time
frame of three years. After three years a new application to the Commission must be made.
Over the time frame for which delegation has been granted, the Commission will evaluate
delegation implementation, coordinate review findings with the delegated authority, and
determine if the new delegation should be granted.
I. A delegated authority may sub-delegate program elements, with Commission concurrence, to, a
conservation district, regional council of government or other responsible entity or agency.
J. The Commission shall maintain, and make available upon request, a listing of the current status
of delegation for all jurisdictions within the State.
K. Any local government that has adopted a stormwater management and/or sediment control
program prior to the effective date of these regulations may request approval of any, or all,
components of its existing program within six months of the effective date of these regulations.
The Commission shall give priority to the approval, approval with modification or disapproval
of these requests. The local government shall continue to administer the existing program
during the review process by the Commission. Efficiency and effectiveness of the existing
program shall be considered in the review process.
(1) The Commission shall approve a delegation request upon determining that the
implementation of the existing program by the local government equal or exceed the
requirements, criteria, standards and specifications of these regulations.
(2) If the request for delegation of program components are disapproved, the local government
may appeal the decision of the Commission by requesting an administrative hearing within
30 days after receiving written notification of the disapproval as described in R.72-313.

L.; If the Commission determines that a delegated program falls below acceptable standards
established by these regulations, delegation may be suspended. During a period of suspension,
the Commission shall be responsible for implementation of the program element. The
Commission shall collect fees based on R.72-306 for use when the delegation is suspended.
The following actions may be cause for suspension if they represent a continuing pattern of
action or in-action:
(1) Failure of implementing agency with the responsibility for enforcement to issue a violation
in the event of off-site sediment or stormwater damage resulting from non-compliance with
the approved plan.
(2) Failure of the implementing agency to assess a fine when a violation has not been corrected
within the specified time frame.
(3) Failure of the implementing agency to stop work when a violation has resulted in off-site
damages.
(4) Failure of the implementing agency to force compliance with an approved plan.
(5) Failure of the delegated program to comply with the provisions of its application for
delegation.

M. Upon suspension of the delegation, the implementing agency has the right to file an appeal
within 30 days of the notification of the suspension following procedures listed in R.72-313.
The Commission shall administer the program during the appeal process.

72-305. Permit Application and Approval Process.
A. After the effective date of these regulations, unless a particular activity is exempted by these
regulations, a person may not undertake a land disturbing activity without an approved
stormwater management and sediment control plan from the appropriate plan approval agency
that is consistent with the following items:
(1) Chapter 14, Title 48, South Carolina Code, relating to erosion and sediment control and
stormwater management, and
(2) These regulations, or duly adopted county or municipal ordinances or programs that are
adopted as a part of the delegation process and set minimum standards equivalent to these
regulations.

B. Specific requirements of the permit application and approval process are generally based on the
extent of the land disturbing activity. The permit application and approval procedure is as
follows:
(1) For land disturbing activities involving two (2) acres or less of actual land disturbance
which are not part of a larger common plan of development or sale, the person responsible
for the land disturbing activity shall submit a simplified stormwater management and
sediment control plan meeting the requirements of R.72-307H. This plan does not require
approval by the implementing agency and does not require preparation or certification by
the designers specified in R.72-305H and R.72-305I.
(2) For land disturbing activities involving more than two (2) acres and less than five (5) acres
of actual land disturbance which are not part of a larger common plan of development or
sale, a simplified permitting and approval process will be used meeting the requirements
of R.72-307I. These activities are required to utilize Best Management Practices (BMP's)
to control erosion and sediment and to utilize appropriate measures to control the quantity
of stormwater runoff. Plans and specifications for these activities will be prepared by the
designers cited in R.72-305H and R.72-305I. The implementing agency will review these
submissions within a ten working day period. If action is not taken by the end of the
review period, the plan will be considered approved..
(3) For land disturbing activities disturbing more than five (5) acres, the requirements of
R.72-305 and R.72-307 will apply. However, the use of measures other than ponds to
achieve water quality improvement are recommended on sites containing less than ten (10)
disturbed acres. Plans and specifications for these activities will be prepared by the
designers specified in R.72-305H or R.72-305I.
(4) These requirements may be modified on a case-by-case basis to address specific stormwater
quantity or quality problems or to meet S.C. Coastal Council or other regulatory
requirements. Requests for waivers or variances from these requirements will be made in
accordance with the provisions of R.72-302.
(5) When the land disturbing activity consists of the construction of a pond, lake or reservoir
which is singly built and not part of a permitted land disturbing activity, the following
procedures will apply:
(a) A stormwater management and sediment control plan will not be required if the pond,
lake or reservoir is permitted under the S.C. Dams and Reservoirs Safety Act or has
received a Certificate of Exemption from the S.C. Dams and Reservoirs Safety Act.
Best management practices should be used to minimize the impact of erosion and
sediment.
(b) A stormwater management and sediment control plan will be required for the
construction of all ponds, lakes or reservoirs not meeting the conditions in

R.72-305B(5)(a) that otherwise meet the size requirements for stormwater
management and sediment control plan approval.

C. A stormwater management and sediment control plan or an application for a waiver shall be
submitted to the appropriate plan approval agency by the person responsible for the land
disturbing activity for review and approval for a land disturbing activity, unless otherwise
exempted, The stormwater management and sediment control plan shall contain supporting
computations, drawings, and sufficient information describing the manner, location, and type of
measures in which stormwater runoff will be managed from the entire land disturbing activity.
The appropriate plan approval agency shall review the plan to determine compliance with the
requirements of these regulations prior to approval. � The approved stormwater management
and sediment control plan shall serve as the basis for water quantity and water quality control
on all subsequent construction.
D. All stormwater management and sediment control plans submitted for approval shall contain
certification by the person responsible for the land disturbing activity that the land disturbing
activity will be accomplished pursuant to the approved plan and that responsible personnel will
be assigned to the project.
E. All stormwater management and sediment control plans shall contain certification by the person
responsible for the land disturbing activity of the right of the: Commission or implementing
agency to conduct on-site inspections.
F. The stormwater and sediment management plan shall not be considered approved without the
inclusion of an approval stamp with a signature and date on the plans by the appropriate plan
approval agency. The stamp of approval on the plans is solely an acknowledgement of
satisfactory compliance with the requirements of these regulations. The approval stamp does
not constitute a representation or warranty to the applicant or any other person concerning the
safety, appropriateness :of effectiveness of any provision, or omission from the stormwater and
sediment plan.
G. When the local conservation district is not the plan approval agency, the conservation district
may request to review and comment on stormwater management and sediment control plans.
Failure of the conservation district to provide comments by the date specified by the local
implementing agency will not delay the approval of the stormwater management and sediment
control plans by the implementing agency.
H. All stormwater management and sediment control plans submitted to the appropriate plan
approval agency for approval shall be certified by the designer. The following disciplines may
certify and stamp/seal plans as allowed by their respective licensing act and regulations:
(1) Registered professional engineers as described in Title 40, Chapter 22.
(2) Registered landscape architects as described in Title 40, Chapter 28, Section 10, item (b). .
(3) Tier B land surveyors as described in Title 40, Chapter 22.

I. Pursuant to Title 40, Chapter 22, Section 460, stormwater management and sediment control
plans may be prepared by employees of the federal government and submitted by the person
responsible for the land disturbing activity to the appropriate plan approval agency for
approval.
J. These regulations do not prohibit other disciplines or Certified.Professionals, including, but not
limited to, Certified Professional Erosion and Sediment Control Specialists, which have
appropriate background and experience from taking active roles in the preparation of the plan
and design process. All plans and specifications submitted to the appropriate plan approval
agency for approval shall be stamped/sealed by those listed in R.72-305H or prepared by
employees of the federal government under R.72-305I.

K. Approved plans remain valid for 5 years from the date of an approval. Extensions or renewals
of the plan approvals will be granted by the plan approval agency upon written request by the
person responsible for the land disturbing activity,
L. Approvals of land disturbing activities which were approved prior to the effective date of these
regulations shall remain in effect for the original term of the approval. For land disturbing
activities which were not initiated during the original term of approval, the person responsible
for the land disturbing activity shall resubmit the stormwater management and sediment control
plan to the appropriate plan approval agency for review and approval subject to the
requirements of these regulations.
M. Upon receipt of a completed application for sediment and stormwater management, the
appropriate plan approval agency shall accomplish its review and have either the approval or
review comments transmitted to the applicant within 20 working days. If notice is not given to
the applicant or if action is not taken by the end of the 20 working day period, the applicants
plan will be considered approved.
N. One year after the effective date of Chapter 14, Title 48 of the Code of Laws of South
Carolina, a federal agency or facility may not undertake a land disturbing activity unless the
agency has submitted a stormwater management and sediment control plan for the specific
activity to the Commission and the plan has been approved. In lieu of submitting individual
plans for approval, the federal agency or facility may submit an application for a general permit
to the Commission for approval.
O. A local government or special purpose or public service district may request a general permit
for its regulated activities from the Commission. If a local government's or special purpose or
public service district's request is approved, individual stormwater management and sediment
control plans for regulated land disturbing activities will not be required.

72-306. Fees.
A. The fees associated with the plan review and approval process inspection and enforcement shall
be set by the implementing agency. If permit fees are established, they shall be established in
accordance with the following items:
(1) Delegation of program elements will'depend, to a large extent, on funding and personnel
commitments. If the delegated jurisdiction has a source of funding that is provided through
local revenues, then the implementation of the delegated component will not necessitate the
imposition of a permit fee to cover the cost of the delegated program component.
(2) In the event that one component of an overall stormwater management and sediment
control program is not funded through the use of general or special funds, a non-refundable
permit fee may be collected at the time that the stormwater management and sediment
control plan or application for waiver or variance is submitted'or approved. The permit fee
will provide for the unfunded costs of plan review, administration and management of the
permitting office, construction review, maintenance inspection, and education and training.
The plan review or permit approval agency shall be responsible for the collection of the
permit fee. Unless all program elements in a county or municipality have been delegated to
a single agency, the funds collected not supporting the plan review function shall be
distributed to the appropriate agencies.
(3) The number of needed personnel and the direct and indirect expenses associated with those
personnel shall be developed by the agencies requesting delegation in a. specific
jurisdiction. Those expenses will then form the basis for determining unit plan approval
costs by the local government.

B. Where the Commission is the implementing agency, the Commission may assess a fee not to
exceed $50.00 per disturbed acre up to a maximum of $1000.00. No fee will be charged for
land disturbing activities which disturb two acres or less. The Commission may also charge a
fee not to exceed $100.00 to review an application for a waiver or variance from the
requirements of these regulations. No fee will be charged for extensions or renewal of plan
approval unless there are significant changes to the plans.
C. A maintenance fee may be required on approvals granted for stormwater management
structures that will be maintained by a local government.

72-307. Specific Design Criteria, Minimum Standards and Specifications.
A. General submission requirements for all projects requiring stormwater management and
sediment control plan approval will include the following information as applicable:
(1) A standard application form,
(2) A vicinity map indicating north arrow, scale, and other information necessary to locate the
property or tax parcel,
(3) A plan at an appropriate scale accompanied by a design report and indicating at least:
(a) The location of the land disturbing activity shown on a USGS 7.5 minute topographic
map or copy.
(b) The existing and proposed topography, overlayed on a current plat showing existing
and proposed contours as required by the implementing agency. The plat and
topographic map should conform to provisions of Article 4, Regulations 400-490.
(c) The proposed grading and earth disturbance including:
1. Surface area involved; and
2. Limits of grading including limitation of mass clearing and grading whenever
possible.
(d) Stormwater management and stormwater drainage computations, including:
1. Pre- and post-development velocities, peak rates of discharge, and inflow and
outflow hydrographs of stormwater runoff at all existing and proposed points of
discharge from the site,
2. Site conditions around points of all surface water discharge including vegetation and
method of flow conveyance from the land disturbing activity, and
3. Design details for structural controls.
(e) Erosion and sediment control provisions, including:
1. Provisions to preserve top soil and limit disturbance;
'2. Details of site grading; and
3. Design details for structural controls which includes diversions and swales.
(4) Federal Emergency Management Agency flood maps and federal and State wetland maps,
where appropriate.
(5) The appropriate plan approval agency shall require that plans and design reports be sealed
by a qualified design professional that the plans have been designed in accordance with
approved sediment and stormwater ordinances and programs, regulations, standards and
criteria.
(6) Additional information necessary for a complete project review may be required by the
appropriate plan approval agency as deemed appropriate. This additional information may
include items such as public sewers, water lines, septic fields, wells, etc.

B. Specific requirements for the erosion and sediment control portion of the stormwater
management and sediment control plan approval process include, but are not limited to, the

following items. The appropriate plan approval agency may modify the following items for a
specific project or type of project.
(1) All plans shall include details and descriptions of temporary and permanent erosion and
sediment control measures and other protective measures shown on the stormwater and
sediment management plan. Procedures in a stormwater and sediment management plan
shall provide that all sediment and erosion controls are inspected at least once every seven
calendar day and after any storm event of greater than 0.5 inches of precipitation during
any 24-hour period.
(2) Specifications for a sequence of construction operations shall be contained on all plans
describing the relationship between the implementation and maintenance of sediment
controls, including permanent and temporary stabilization and the various stages or phases
of earth disturbance and construction. The specifications for the sequence of construction
shall, at a minimum, include the following activities:
(a) Clearing and grubbing for those areas necessary for installation of perimeter controls;
(b) Installation of sediment basins and traps;
(c) Construction or perimeter controls;
(d) Remaining clearing and grubbing;
(e) Road grading;
(f) Grading for the remainder of the site;
(g) Utility installation and whether stormdrains will be used or blocked until after
completion of construction;
(h) Final grading, landscaping, or stabilization; and
(i) Removal of sediment controls.
Changes to the sequence of construction operations may be modified by the person conducting
the land disturbing activity or their representative and do not constitute a violation unless
measures to control stormwater runoff and sediment are not utilized.
(3) The plans shall contain a description of the predominant soil types on the site, as described
by the appropriate soil survey information available through the Commission or the local
Conservation District.
(4) When work in a live waterway is performed, precautions shall be taken to minimize
encroachment, control sediment transport and stabilize the work area to the greatest extent
possible during construction.
(5) Vehicle tracking of sediments from land disturbing activities onto paved public roads
carrying significant amounts of traffic (ADT of 25 vehicles/day or greater) shall be
minimized.
C. Specific requirements for the permanent stormwater management portion of the stormwater
management and sediment control plan approval process include, but are not limited to, the
following items. The appropriate plan approval agency may modify the following items for a
specific project or type or project.
(1) It is the overall goal of the Commission to address stormwater management on a watershed
basis to provide a cost effective water quantity and water quality solution to the specific
watershed problems. These regulations will provide general design requirements that must
be adhered to in the absence of Designated Watershed specific criteria.
(2) All hydrologic computations shall be accomplished using a volume based hydrograph
method acceptable to the Commission. The storm duration for computational purposes for
this method shall be the 24-hour rainfall event, SCS distribution with a 0.1 hour burst
duration time increment. The rational and/or modified rational methods are acceptable for
sizing individual culverts or stormdrains that are not part of a pipe network or system and

do not have a contributing drainage area greater than 20 AC. The storm duration for
computational purposes for this method shall be equal to the time of concentration of the
contributing drainage area or a minimum of 0.1 hours, whichever is less.
(3) Stormwater management requirements for a specific project shall be based on the entire
area to be developed, or if phased, the initial submittal shall control that area proposed in
the initial phase and establish a procedure and obligation for total site control.
(4) Water quantity control is an integral component of overall stormwater management. The
following design criteria for flow control is established for water quantity control purposes,
unless a waiver is granted based on a case-by-case basis:
(a) Post-development peak discharge rates shall not exceed pre-development discharge
rates for the 2- and 10- year frequency 24-hour duration storm event. Implementing
agencies may utilize a less frequent storm event (e.g. 25-year, 24-hour) to address
existing or future stormwater quantity or quality problems.
(b) Discharge velocities shall be reduced to provide a nonerosive velocity flow from a
structure, channel, or other control measure or the velocity of the 10-year, 24-hour
storm runoff in the receiving waterway prior to the land disturbing activity, whichever
is greater.
(c) Watersheds, other than Designated Watersheds, that have well documented water
quantity problems may have more stringent, or modified, design criteria determined by
the local government that is responsive to the specific needs of that watershed.
(5) Water quality control is also an integral component of stormwater management. The
following design criteria is established for water quality protection unless a waiver or
variance is granted on a case-by-case basis.
(a) When ponds are used for water quality protection, the ponds shall be designed as both
quantity and quality control structures. Sediment storage volume shall be calculated
considering the clean out and maintenance schedules specified by the designer during
the land disturbing activity. Sediment storage volumes may be predicted by the
Universal Soil Loss Equation or methods acceptable to the Commission.
(b) Stormwater runoff and drain to a single outlet from land disturbing activities which
disturb ten acres or more shall be controlled during the land disturbing activity by a
sediment basin where sufficient space and other factors allow these controls to be used
until the final inspection. The sediment basin shall be designed and constructed to
accommodate the anticipated sediment loading from the land-disturbing activity and
meet a removal efficiency of 80 percent suspended solids or 0.5 ML/L peak settable
solids concentration, whichever is less. The outfall device or system design shall take
into account the total drainage area flowing through the disturbed area to be served by
the basin.
(c) Other practices may be acceptable to the appropriate plan approval agency if they
achieve an equivalent removal efficiency of 80 percent for suspended solids or 0.5
ML/L peak settable solids concentration, which ever is less. The efficiency shall be
calculated for disturbed conditions for the 10-year 24-hour design event.
(d) Permanent water quality ponds having a permanentspool shall be designed to store and
release the first �h inch of runoff from the site over a 24 hour period. The storage
volume shall be designed to accommodate, at least, 'A inch of runoff from the entire
site.
(e) Permanent water quality ponds, not having a permanent pool, shall be designed to
release the first inch of runoff from the site over a 24-hour period.
(f) Permanent infiltration practices, when used, shall be designed to accept, at a minimum,
the first inch of runoff from all impervious areas.

(g) For activities in the eight coastal counties of Beaufort, Berkeley, Charleston, Colleton,
Dorchester, Georgetown, Jasper and Horry, additional water quality requirements may
be imposed to comply with the S.C. Coastal Council Stormwater Management
Guidelines. If conflicting requirements exist for activities in the eight coastal counties,
the S.C. Coastal Council guidelines will apply.
(6) Where ponds are the proposed method of control, the person responsible for. the land
disturbing activity shall submit to the approving agency, when required, an analysis of the
impacts of stormwater flows downstream in the watershed for the 10- and 100-year
frequency storm event. The analysis shall include hydrologic and hydraulic calculations
necessary to determine the impact of hydrograph timing modifications of the proposed land
disturbing activity, with and without the pond. The results of the analysis will determine
the need to modify the pond design or to eliminate the pond requirement. Lacking a
clearly defined downstream point of constriction, the downstream impacts shall be
established, with the concurrence of the implementing
(7) Where existing wetlands are intended as a component of an overall stormwater
management system, the approved stormwater management and sediment control plan shall
not be implemented until all necessary federal and state permits have been-obtained.
(8) Designs shall be in accordance with standards developed or approved by the Commission.
(9) Ease of maintenance must be considered as a site design component. Access to the
stormwater management structure must be provided.
(10) A clear statement of defined maintenance responsibility shall be established during the
plan review and approval process.
(11) Infiltration practices have certain limitations on their use on certain sites. These
limitations include the following items:
(a) Areas draining to these practices must be stabilized and vegetative filters established
prior to runoff entering the system. Infiltration practices shall not be used if a
suspended solids filter system does not accompany the practice. If vegetation is the
intended filter, there shall be, at least a 20 foot-length of vegetative filter prior to
stormwater runoff entering the infiltration practice;.
(b) The bottom of the infiltration practice shall be at least 0.5 feet above the seasonal high
water table, whether perched or regional, determined by direct piezometer
measurements which can be demonstrated to be representative of the maximum height
of the water table on an annual basis during years of normal precipitation, or by the
depth in the soil at which mottling first occurs;
(c) The infiltration practice shall be designed to completely drain of water within 72 hours;
(d) Soils must have adequate permeability to allow water to infiltrate. Infiltration practices
are limited to soils having an infiltration rate of least 0.30 inches per hour. Initial
consideration will be based on a review of the appropriate soil survey, and the survey
may serve as a basis for rejection. On-site soil borings and textural classifications must
be accomplished to verify the actual site and seasonal high water table conditions when
infiltration is to be utilized;
(e) Infiltration practices greater than three feet deep shall be located at least 10 feet from
basement walls;
(f) Infiltration practices designed to handle runoff from impervious parking areas shall be a
minimum of 150 feet from any public or private water supply well;
(g) The design of an infiltration practice shall provide an overflow system with measures to
provide a non-erosive velocity of flow along its length and at the outfall;

(h) The slope of the bottom of the infiltration practice shall not exceed five percent. Also,
the practice shall not be installed in fill material as piping along the fill/natural ground
interface may cause slope failure;
(i) An infiltration practice shall not be installed on or atop a slope whose natural angle of
incline exceeds 20 percent.
(j) Clean outs will be provided at a minimum, every 100 feet along the infiltration practice
to allow for access and maintenance.
(12) A regional approach to stormwater management is an acceptable alternative to site
specific requirements and is encouraged.

D. All stormwater management and sediment control practices shall be designed, constructed and
maintained with consideration for the proper control of mosquitoes and other vectors. Practices
may include, but are not limited to:
(1) The bottom of retention and detention ponds should be graded and have a slope not less
than 0.5 percent.
(2) There should be no depressions in a normally dry detention facility where water might
pocket when the water level is receding.
(3) Normally dry detention systems and swales should be designed to drain within three (3)
days.
(4) An aquatic weed control program should be utilized in permanently wet structures to
prevent an overgrowth of vegetation in the pond. Manual harvesting is preferred.
(5) Fish may be stocked in permanently wet retention and detention ponds.
(6) Normally dry swales and detention pond bottoms should be constructed with a gravel
blanket or other measure to minimize the creation of tire ruts during maintenance activities.

E. A stormwater management and sediment control plan shall be filed for a residential
development and the buildings constructed within, regardless of the phasing of construction.
(1) In applying the stormwater management and sediment control criteria, in R.72-307,
individual lots in a residential subdivision development shall not be considered to be
separate land disturbing activities and shall not require individual permits. Instead, the
residential subdivision development, as a whole, shall be considered to be a single land
disturbing activity. Hydrologic parameters that reflect the ultimate subdivision
development shall be used in all engineering calculations.
(2) If individual lots or sections in a residential subdivision are being developed by different
property owners, all land-disturbing activities related to the residential subdivision shall be
covered by the approved stormwater management and sediment control plan for the
residential subdivision. Individual lot owners or developers may sign a certificate of
compliance that all activities on that lot will be carried out in accordance with the approved
stormwater management and sediment control plan for the residential subdivision. Failure
to provide this certification will result in owners or developers of individual lots developing
a stormwater management and sediment control plan meeting the requirements of R.72-
307.
(3) Residential subdivisions which were approved prior to the effective date of these
regulations are exempt from these requirements. Development of new phases of existing
subdivisions which were not previously approved shall comply with the provisions of these
regulations.

F. Risk analysis may be used to justify a design storm event other than prescribed or to show that
rate and volume control is detrimental to the hydrologic response of the basin and therefore,
should not be required for a particular site.
(1) A complete watershed hydrologic/hydraulic analysis must be done using a complete
model/procedure acceptable to the implementing agency. The level of detail of data
required is as follows:
(a) Watershed designation on the 7.5 minute topo map exploded to a minimum of 1" =
400'.
(b) Inclusion of design and performance data to evaluate the effects of any structures which
effect discharge. Examples may be ponds or lakes, road crossings acting as attenuation
structures and there may be others which must be taken into account.
(c) Land use data shall be taken from the most recent aerial photograph and field checked
and updated.
(d) The water surface profile shall be plotted for the conditions of pre- and post-
development for the 10-, and 100-year 24-hour storm.
(e) Elevations of any structure potentially damaged by resultant flow shall also be shown.
(2) Based on the results of this type of evaluation, the certified plan reviewer representing the
implementing agency shall review and evaluate the proposed regulation waiver or change.

G. The general permit application for use by federal, local governments, or special
purpose or public service districts shall contain, as a minimum, standard plans and
specifications for stormwater management and erosion and sediment control; methods used to
calculate stormwater runoff, soil loss and control method performance; staff assigned to
monitor land disturbing activities and procedures to handle complaints for off-site property
owners and jurisdictions. This general permit will be valid for a period of three years and will
be subject to the same review criteria by the Commission as that of the delegated program
elements.
The use of the general permit classification does not relinquish a land disturbing activity from
the requirements of these Regulations. Rather, the general permit precludes that activity from
the necessity of a specific plan review for each individual project.
Approval of a general permit does not relieve any agency from the conditions that are part of
the general permit approval regarding the implementation of control practices as required by
the general permit. Failure to implement control practices pursuant to conditions included in
the general permit may result in the revocation of the general permit and the requirement of the
submission of individual plans for each activity.
H. The stormwater management and sediment control plan required for land disturbing activities of
two (2) acres or less which are not part of a larger common plan of development or sale shall
contain the following information, as applicable:
(1) An anticipated starting and completion date of the various stages of land disturbing
activities and the expected date the final stabilization will be completed;
(2) A narrative description of the stormwater management and sediment control plan to be
used during land disturbing activities;
(3) General description of topographic and soil conditions of the tract from the local soil and
water conservation district;
(4) A general description of adjacent property and a description of existing structures,
buildings, and other fixed improvements located on surrounding properties;

(5) A sketched plan (engineer's, Tier B surveyor's or landscape architect's seal not required)
to accompany the narrative which shall contain:
(a) A site location drawing of the proposed project, indicating the location of the proposed
project in relation to roadways, jurisdictional boundaries, streams and rivers;
(b) The boundary lines of the site on which the work is to be performed;
(c) A topographic map of the site if required by the implementing agency;
(d) The location of temporary and permanent vegetative and structural stormwater
management and sediment control measures.
(6) Stormwater management and sediment control plans shall contain certification by the
person responsible for the land disturbing activity that the land disturbing activity will be
accomplished pursuant to the plan.
(7) All stormwater management and sediment control plans shall contain certification by the
person responsible'for the land disturbing activity of the right of the Commission or
implementing agency to conduct on-site inspections.
The requirements contained above may be indicated on one plan sheet.
I. The stormwater management and sediment control plan for land disturbing activities of greater
than two (2) acres but less than five (5) acres which are not part of a lager common plan of
development or sale shall contain the following information, as applicable:
(1) An abbreviated application form;
(2) A vicinity map sufficient to locate the site and to show the relationship of the site to its
general surroundings at a scale of not smaller than one (1) inch to one (1) mile.
(3) The site drawn to a scale of not smaller than one (1) inch to 200 feet, showing:
(a) The boundary lines of the site on which the work is to be performed, including the
approximate acreage of the site;
(b) Existing contours and proposed contours as required by the implementing agency;
(c) Proposed physical improvements on the site,'including present development and future
utilization if future development is planned;
(d) A plan for temporary and permanent vegetative and structural erosion and sediment
control measures which specify the erosion and sediment control measures to be used
during all phases of the land disturbing activity and a description of their proposed
operation;
(e) Provisions for stormwater runoff control during the land disturbing activity and during
the life of the facility, including a time schedule and sequence of operations indicating
the anticipated starting and completion dates of each phase and meeting the following
requirements:
1. Post-development peak discharge rates shall not exceed pre-development
discharge rates for the 2- and 10- year frequency 24-hour duration storm event.
Implementing agencies may utilize a less frequent storm event (e.g. 25-year, 24-
hour) to address existing or future stormwater quantity or quality problems.
2. Discharge velocities shall be reduced to provide a nonerosive velocity flow
from a structure, channel, or other control measure or the velocity of the 10-year,
24-hour storm runoff in the receiving waterway prior to the land disturbing
activity, whichever is greater.
(f) A complete and adequate grading plan for borrow pits and material processing facilities
where applicable, including restoration and revegetation measures;
(g) A general description of the predominant soil types on the site;
(h) A description of the maintenance program for stormwater management and sediment
control facilities including inspection programs.

(4) All stormwater management and sediment control plans submitted for approval shall
contain certification by the person responsible for the land disturbing activity that the land
disturbing activity will be accomplished pursuant to the approved plan.
(5) All stormwater management and sediment control plans shall contain certification by the
person responsible for the land disturbing activity of the right of the Commission or
implementing agency to conduct on-site inspections.
(6) All stormwater management and sediment control plans submitted to the appropriate plan
approval agency for approval shall be certified by the designer. The following disciplines
may certify and stamp/seal plans as allowed by their respective licensing act and
regulations:
(a) Registered professional engineers as described in Title 40, Chapter 22.
(b) Registered landscape architects as describe in Title 40, Chapter 28, Section 10,
item (b).
(c) Tier B land surveyors as described in Title 40, Chapter 22.
(7) Pursuant to Title 40, Chapter 22, Section 460, stormwater management and sediment
control plans may be prepared by employees of the federal government and submitted by
the person responsible for;the land disturbing activity to the appropriate plan approval
agency for approval.

72-308. Maintenance Requirements and Off-Site Damage Correction.
A. The Commission will provide technical assistance to local governments who choose to
assume the maintenance responsibility for stormwater management structures on, at least,
residential lands.
B. The person responsible for maintenance shall perform or cause to be performed preventive
maintenance of all completed stormwater management practices to ensure proper functioning.
The responsible inspection agency shall ensure preventive maintenance through inspection of all
stormwater management practices.
C. Inspection reports shall be maintained by the responsible inspection agency on all detention and
retention structures and shall include the following items (as applicable):
(1) The date of inspection;
(2) The name of the inspector;
(3) The condition of (if applicable):
(a) Vegetation,
(b) Fences,
(c) Spillways,
(d) Embankments,
(e) Reservoir area,
(f) Outlet channels,
(g) Underground drainage,
(h) Sediment load, or
(i) Other items which could effect the proper function of the structure.
(4) Description of needed maintenance.

D. Responsible inspection agencies shall provide procedures to ensure that deficiencies indicated
by inspections are rectified. The procedures shall include the following:
(1) Notification to the person responsible for maintenance of deficiencies including a time
frame for repairs;

(2) Subsequent inspection to ensure completion of repairs; and
(3) Effective enforcement procedures or procedures to refer projects to the Commission if
repairs are not undertaken or are not done properly.

E. The following criteria shall be used by the appropriate implementing agency in evaluating and
for correcting off-site damages resulting from the land disturbing activity:
(1) Determine the extent of damage by sediment resulting from non-compliance with the
approved stormwater management and sediment control plan,
(2) Determine the classification of the impaired waterbody, if any,
(3) Determine the impact and severity of the damage resulting from non-compliance with the
approved stormwater management and sediment control plan,
(4) Develop an agreement with landowners for cleanup and corrections, including a schedule
of implementation.
(5) Evaluate the alternatives for correction of the damage and prevention of future damage,
and
(6) Failure to implement the agreement in the required schedule will constitute a violation of
these regulations.

72-309. Criteria For Designated Watersheds.
The concept of designated watersheds is intended, not only to prevent existing water quantity and
water quality problems from getting worse, but also to reduce existing flooding problems and to
improve existing water quality or meet State Water Quality Standards through a reduction of the
impacts of NPS pollution in selected watersheds. Further, the designation of watersheds under this
section may also be used to protect watersheds which do not currently have significant water quality
or quantity problems, but which require protection in order to avoid or mitigate the occurrence of
future problems which might impair current or protected multiple water uses or important water
resources within the watershed. Criteria is established for designated watersheds and these criteria
will depend on whether the specific problems of the watershed are water quantity or water quality
oriented. Water quantity and water quality concerns will be considered in all designated watersheds,
but the overall emphasis for each designated watershed will depend on its existing and future water
quality and quantity issues as well as consideration of the multiple offstream and instream water uses
within the watershed.
A. To initiate consideration of a watershed for Designated Watershed status, a watershed shall be
recommended by a local government or combinations of local governments through the passage of
a local ordinance to the Commission. Upon recommendation to the Commission, the Commission
shall publish the request in the State Register and contact all involved agencies at the local and state
level within 30 days after receipt of the designation request and their input received prior to any
consideration of the designation is made.
B. Included with the recommendation of a watershed for Designated Watershed status to the
Commission shall be an identification of the specific problems that exist in the watershed so that the
pursuit of a watershed study is warranted. Designation as a Designated Watershed requires
approval by the Commission, the South Carolina Water Resources Commission and the South
Carolina Department of Health and Environmental Control. A significant water quantity or water
quality problem must exist that would support this designation. Also, inclusion of a watershed as a
Designated Watershed will necessitate a public hearing process. The process of designating a
watershed shall be based on the following information:

(1) An estimate of the potential for land disturbing activities to be initiated in the basin which
would be regulated under this regulation. This estimate could utilize historical and projected
population growth, land use data, and other such- appropriate measures to estimate the nonpoint
source pollution contribution or stormwater runoff which could be reduced or avoided,
(2) An inventory of the offstream and instream water uses in the watershed to quantify and
characterize the benefits associated with reducing current or avoiding future water resources
problems in the watershed. These could include water supply intakes, State navigable waters,
recreational resources, fisheries resources, wetlands, or other such important uses,
(3) Water quality data, collected through either the statewide water quality inventory, or other
special studies inclusive of benthic macroinvertebrate data,
(4) Historical and estimated flood damage and/or estimated flood protection benefits to both private
and public property in the watershed,
(5) Status of current or description of proposed State and Federal flood protection and flood plain
management program(s) and activities in the watershed, and
(6) Dangers to public health and welfare.

C. Following an adequate review of the recommendation, staff of the Commission, South Carolina
Water Resources Commission, and the South Carolina Department of Health and Environmental
Control shall meet to review and discuss their decision regarding designation. The staff shall
prepare a statement in support of, or objection to, the proposed designation within 120 days
following receipt of the recommendation by the Commission. The statement shall be voted upon
by the appointed commissioners of each respective agency. Ex-officio members of the South
Carolina Water Resources Commission representing the Land Resources Conservation Commission
and the South Carolina Department of Health and Environmental Control shall abstain from voting
regarding designation at the meeting of the South Carolina Water Resources Commission.
Approval by each of the three agencies shall constitute designation.
D. Upon approval of designation, a Watershed Advisory Committee shall be established to advise
and provide guidance in the development and conduct of the watershed master plan. The
Commission, South Carolina Water Resources Commission, and the South Carolina
Department of Health and Environmental Control will appoint the Watershed Advisory
Committee which shall include State, District, local government representatives, and also
representatives of the regulated community within the watershed and other persons which may
be affected by the plan.
E. The general components contained in the actual watershed study shall be the following items:
(1) Stormwater quantity or water quality problem identification,
(2) The overall needs of the watershed including the additional impacts of new land disturbing
activities,
(3) Alternative approaches to address the existing and future problems,
(4) A selected approach that includes the overall costs and benefits,
(5) An economic impact analysis of the selected approach,.-
(6) Schedule for implementation,
(7) Funding sources that are available for the actual implementation of study
recommendations, and
(8) A public hearing prior to final Commission, S.C. Water Resources Commission and S.C.
Department of Health and Environmental Control approval of the watershed study.
F. The following goals are to be obtained through the implementation of the Designated
Watershed program:
(1) Reduction of existing flooding or water quality impacts,

(2) Prevention of future flooding or water quality impacts, and
(3) Minimization of economic and social losses.
G. Specific plan components of a watershed study shall include, but not be limited to, the
following items:
(1) The limits of the watershed.
(2) An inventory of existing water quality data.
(3) An inventory of areas having significant natural resource value as defined in existing State
or local studies as they may be impacted by the construction of location of stormwater
control structures.
(4) An inventory of areas of historical and archaeological value identified in existing State or
local studies as they may be impacted by the construction or location of stormwater control
structures,
(5) A map or series of maps of the watershed showing the following information:
(a) Watershed topography,
(b) Significant geologic formations,
(c) Soils information, ,
(d) Existing land use based on existing zoning,
(e) Proposed land use based on expected zoning or comprehensive plans,
(f) Locations where water quality data were obtained.
(g) Locations of existing flooding problems including floor and corner elevations of
structures already impacted, and
(h) 100-year floodplain delineations, water surface profiles, and storm hydrographs at
selected watershed location.
(6) An inventory of the existing natural and constructed stormwater management system.
(7) An inventory of historic flood damage sites, including frequency and damage estimates,

72-310. Criteria For Implementation of a Stormwater Utility.
The implementation of a stormwater utility will necessitate the development of a local utility
ordinance or special taxing assessment prior to its implementation, pursuant to Chapter 9, Title 4,
1976 Code of Laws as amended by Act 114 1991. There are essential components that an ordinance
must contain to function as a funding mechanism for stormwater management and those components
shall include, but not be limited to, the following items:
A. The financing of a stormwater utility with a user charge system must be reasonable and
equitable so that each user of the stormwater system pays to the extent to which the user
contributes to the need for the stormwater system, and that the charges bear a substantial
relationship to the cost of the service. The use of county and municipal taxpayer rolls and
accounting systems are allowed for the assessment and collection of fees.
B.. The intent of the utility must be clearly defined regarding program components that are to be
funded through the utility. Those components may include but not be limited to the following
activities:
(1)l Preparation of comprehensive watershed master plans for stormwater management,
(2) Annual inspections of all stormwater management facilities, both public and private,
(3) Undertaking regular maintenance, through contracting or other means, of stormwater
management structures that have been accepted for maintenance.
(4) Plan review and inspection of sediment control and stormwater management plans and
practices, and
(5) Retrofitting designated watersheds, through contracting or other means, to reduce
existing flooding problems or to improve water quality.

C. The authority for the creation of the stormwater utility and the imposition of charges to finance
sediment and stormwater activities is conferred in Chapter 14, Title 48, South Carolina Code.
The application of a stormwater utility by means of a local ordinance or other means shall not
be deemed a limitation or repeal of any other powers granted by State statute.
D. The creation of a stormwater utility shall include the following components:
(1) The boundaries of the utility, such as watersheds or jurisdictional boundaries as identified
by the local governing body,
(2) The creation of a management entity,
(3) Identification of stormwater problems,
(4) Method for determining utility charges,
(5) Procedures for investment and reinvestment of funds collected, and
(6) An appeals or petition process.

E. As established by local ordinance or special election or petition, the local government shall
have responsibility for implementing all aspects of the utility including long range planning,
plan implementation, capital improvements, maintenance of stormwater facilities, determination
of charges, billing, and hearing of appeals and petitions. The local government also will have
responsibility for providing staff support for utility implementation.
F. With the respect to new stormwater management facilities constructed by private developers,
the local government shall develop criteria for use in determining whether these will be
maintained by the utility or by the facility owner. Such criteria may include whether the
facility has been designed primarily to serve residential users and whether it has been designed
primarily for purposes of stormwater management. In situations where it is determined that
public maintenance is not preferable, standards shall be developed to ensure that inspection of
facilities occurs annually and that facilities are maintained as needed.
G. The use of charges is limited to those purposes for which the utility has been established,
including but not limited to: planning; acquisition of interests in land including easements;
design and construction of facilities; maintenance of the stormwater system; billing and
administration; and water quantity and water quality management, including monitoring,
surveillance, private maintenance inspection, construction inspection, and other activities which
are reasonably required.

72-311. Plan Review and Inspector Certification Programs.
A. The Commission shall require that local governments which request delegation of stormwater
management and sediment control plan review and approval/disapproval shall have a Certified
Plan Reviewer representing the implementing agency. Certified Plan Reviewers shall obtain
certification from the Commission by successfully completing a Commission sponsored or
approved training program. Exceptions to this requirement are limited to Registered
Professional Engineers, Registered Landscape Architects and Registered Tier B Land
Surveyors who can receive initial certification by demonstrating to the Commission a minimum
of three (3) years experience in stormwater management and sediment control planning and
design.
For a period of one year after the effective date of these regulations, local governments may
receive interim certification for plan reviewers during the period before attendance at a
Commission sponsored or approved training course by submitting an enrollment form to the
Commission. Interim certification shall be valid until the scheduled date of attendance.

B. The Commission shall require that local governments which request delegation of the
construction and maintenance inspection component of the stormwater management and
sediment control program shall have a Certified Construction Inspector representing the
implementing agency. Certified Construction Inspectors shall obtain certification from the
Commission by successfully completing a Commission sponsored or approved training
program.
For a period of one year after the effective date of these regulations, local governments may
receive interim certification for construction inspectors during the period before attendance at a
Commission sponsored or approved training course by submitting an enrollment form to the
Commission. Interim certification shall be valid until the scheduled date of attendance.
C. Initial certification as a Certified Plan Reviewer or Certified Construction Inspector is good for
a period of five years. Recertification is contingent on attending and successfully completing a
Commission sponsored or approved recertification program. This continuing education
requirement applies to all Certified Plan Reviewers, including, Registered Engineers,
Landscape Architects, Tier B Land Surveyors and Construction Inspectors.

72-312. Review and Enforcement Requirements.
A. Items listed in this section are activities by the Commission in the event the Commission serves
as the implementing agency. When the Commission is requested to assist the implementing
agency, these are suggestions the Commission may submit to the implementing agency.
B. The person responsible for the land disturbing activity shall notify the appropriate inspection
agency before initiation of construction and upon project completion when a final inspection
will be conducted to ensure compliance with the approved stormwater management and
sediment control plan.
C. The person responsible for the land disturbing activity shall, if required by the implementing
agency during the plan approval process, submit "As Built or Record Document" plans. In
addition, the person responsible for the land disturbing activity may be required to submit
written certification from the professional engineer, landscape architect, or Tier B land
surveyor responsible for the field supervision of the land disturbing activity that the land
disturbing activity was accomplished according to the approved stormwater management and
sediment control plan or approved changes.
D. The responsible inspection agency shall, for inspection purposes, do all of the following items:
(1) Ensure that the approved stormwater management and sediment control plans are on the
project site and are complied with;
(2) Ensure that every active site is inspected for compliance with the approved plan on a
regular basis;
(3) Provide the person responsible for the land disturbing activity, a written report after every
inspection that describes:
(a) The date and location of the site inspection;
(b) Whether the approved plan has been properly implemented and maintained;
(c) Approved plan or practice deficiencies; and
(d) The action taken.
(4) Notification of the person responsible for the land disturbing activity in writing when
violations are observed, describing the:
(a) Nature of the violation;
(b) Required corrective action; and
(c) Time period for violation correction.

E. The Commission may investigate complaints or refer any complaint received to the local
inspection agency if the activity is located in a jurisdiction that has received delegation of
inspections during construction and maintenance inspections. In conjunction with a referral,
the Commission may also initiate an on-site investigation after notification of the local
inspection agency in order to properly evaluate the complaint. The Commission shall make
recommendations on enforcement action when appropriate, and notify the local implementing
agency in a timely manner of any recommendations.
F. The Commission, at its discretion and upon notification to the person responsible for the land
disturbing activity may visit any site to determine the adequacy of stormwater management and
sediment control practices. In the event that the Commission conducts site inspection, the
appropriate inspection agency shall be notified of the inspection. The appropriate inspection
agency shall establish a time frame to obtain site compliance. This notification shall, in no way
limit the right to the Commission to take action subsequent to any provision of these regulations
or Chapter. Formal procedures for interaction between the Commission and the appropriate
inspection agency on-site inspection and referral will be developed on an individual basis.
G. The appropriate plan approval agency may require a revision to the approved plans as
necessary due to differing site conditions. The appropriate plan approval agency shall establish
guidelines to facilitate the processing of revised plans where field conditions necessitate plan
modification. Where changes to the approved plan are necessary those changes shall be in
accordance to the following:
(1) Major changes to approved stormwater management and sediment control plans, such as
the addition or deletion of a sediment basin, shall be submitted by the applicant to the
appropriate plan approval agency for review and approval.
(2) Minor changes to stormwater management and sediment control plans may be made in the
field review report. The appropriate inspection agency shall develop a list of allowable
field modifications for use by the construction inspector.

H. Stormwater management construction shall have inspections accomplished as needed.
I. The agency responsible for construction inspection may, in addition to local enforcement
options, refer a site violation to the Commission for review.
J. Referral of a site violation to the Commission may initiate a Commission construction
inspection of the site to verify site conditions. That construction inspection may result in the
following actions:
(1) Notification through appropriate means to the person engaged in a land disturbing activity
to comply with the approved plan within a specified time frame; and
(2) Notification of plan inadequacy, with a time frame for the person engaged in a land
disturbing activity to submit a revised sediment and stormwater plan to the appropriate plan
approval agency and to receive its approval with respect thereto.
The Commission shall notify the local inspection agency within five working days of what
recommendation for enforcement action should be taken on the site.
K. Failure of the person engaged in the land disturbing activity contractor to comply with
Commission requirements may result in the following actions in addition to other penalties as
provided in Chapter 14.
(1) The Commission shall have the power to request the implementing agency to order any
person violating any provision of Chapter 14 and these regulations to cease and desist from
any site work activity other than those actions necessary to achieve compliance with any
administrative order.

(2) The Commission may request that the appropriate plan approval agency refrain from
issuing any further building or grading permits to the person having outstanding violations
until those violations have been remedied.
(3) The Commission may recommend fines to be levied by the implementing agency.

L. If the Commission or the implementing agency utilizes "stop work orders" as a part of its
inspection and enforcement program, the following procedure shall be followed:
(1) The implementing agency may issue a stop work order if it is found that a land disturbing
activity is being conducted in violation of this Act or of any regulation adopted or order
issued pursuant to this Act, that the violation is knowing and willful, and that either:
(a) Off-site sedimentation resulting from non-compliance with the approved stormwater
management and sediment control plan has eliminated or severely degraded a use in a
lake or natural waterway or that such degradation is imminent.
(b) Off-site sedimentation resulting from non-compliance with the approved stormwater
management and sediment control plan has caused severe damage to adjacent land.
(c) The land disturbing activity which requires an approved plan under these regulations
and is being conducted without the required approved plan.
(2) The stop work order shall be in writing and shall state what work is to be.stopped and what
measures are required to abate the violation. The order shall include a statement of the
findings made by the implementing agency pursuant to (1) of this section and shall list the
conditions under which work that has been stopped by the order may be resumed. The
delivery of equipment and materials which does not contribute to the violation may
continue while the stop work order is in effect. A copy of this section shall be attached to
the order.
(3) The stop work order shall be served by the sheriff of the county in which the land
disturbing activity is being conducted or by some other person duly authorized by law to
serve process, and shall be served on the person at the site of the land disturbing activity
who is in operational control of the land disturbing activity. The sheriff or other person
duly authorized by law to serve process shall post a copy of the stop work order in a
conspicuous place at the site of the land-disturbing activity. The implementing agency shall
also deliver a copy of the stop work order to any person that the implementing agency has
reason to believe may be responsible for the violation.
(4) The directives of a stop work order become effective upon service of the order.
Thereafter, any person notified of the stop work order who violates any of the directives set
out in the order may be assessed a civil penalty as provided in R.72-315. A stop work
order issued pursuant to this section may be issued for a period not to exceed three calendar
days.
(5) The implementing agency shall designate an employee to monitor compliance with the stop
work order. The name of the employee so designated shall be included in the stop work
order. The employee so designated shall rescind the stop work order if all the violations
for which the stop work order are issued are corrected, no other violations have occurred,
and all measures necessary to abate the violations have been taken. The implementing
agency shall rescind a stop work order that is issued in error.
(6) The issuance of a stop work order shall be a final agency decision subject to judicial review
in the same manner as an order in a contested case pursuant to Title 1, Chapter 23, Section
380 of the Code of Laws of South Carolina, 1976. The petition for judicial review shall be
filed in the circuit court of the county in which the land-disturbing activity is being
conducted.

(7) The Commission shall file a cause of action to abate the violations which resulted in the
issuance of a stop work order within three calendar days of the service of the stop work
order. The cause of action shall include a motion for an ex parte temporary restraining
order to abate the violation and to effect necessary remedial measures. The resident circuit
court judge, or any judge assigned to hear the motion for the temporary restraining order,
shall hear and determine the motion within two days of the filing of the complaint. The
clerk of circuit court shall accept complaints filed pursuant to this section without the
payment of fining fees. Filing fees shall be paid to the clerk of circuit court within 30 days
of the fining of the complaint.

72-313. Hearings and Hearing Procedures.
A. An administrative hearing is available, following a timely request, to determine the propriety
of:
(1) The denial of delegation of a program component.
(2) A revocation of a delegated program component.
(3) A denial or revocation of a permit for stormwater management and sediment control.
(4) A citizen complaint concerning program operation.
(5) The requirements imposed by the implementing agency for approval of the stormwater
management and sediment reduction plan.
(6) The issuance of a notice of violation or non-compliance with the approved stormwater
management and sediment reduction plan.
(7) The issuance of fines by an implementing agency.
(8) The issuance of a stop work order by an implementing agency.
B. Requests for administrative hearings and appeals may be made to local governments when
program elements are delegated by the Commission or to the Commission when the
Commission functions as the implementing agency. In addition, administrative hearings and
appeals may be held by the Commission regarding decisions or actions of local implementing
agencies. Procedures for acting on appeals and conducting administrative hearings by local
implementing agencies will be specified in their request for delegation of program element.
The Commission procedures for conducting administrative hearings is specified in R.72-313C
through R.72-313Q.
C. A hearing may be requested by any person. If an adverse action is involved, the hearing may
be requested provided that the written request is received within thirty (30) days after the notice
is given to the person.
D. All hearings shall be initiated via correspondence approved by the Commission which shall
give notice to all parties of the hearing.
(1) 'All parties must receive notice of the hearing of not less than thirty (30) days;
(2) The notice shall be sent by the designated hearing officer(s);
(3) The notice shall include:
(a) A statement of the time, place, and nature of the hearing;
(b) A statement of the legal authority and jurisdiction under which the hearing is to be
held;
(c) A reference to the particular sections of the statutes and rules involved;
(d) A short and plain statement of the matters asserted. If the hearing officer(s) is/are
unable to state the matters in detail at the time the notice is served, the initial notice
may be limited to a statement of the issues involved. Thereafter, upon application, a
more definite and detailed statement shall be furnished.

E. All hearings shall be conducted by a hearing officer(s) appointed by the Commission.
F. All hearings shall be conducted in accordance with Section 1-23-10 et. seq. of the 1976 South
Carolina Code of Laws.
G. The hearing officer(s) shall issue a proposal for decision which shall be mailed to the parties.
H. Within twenty (20) days after mailing of the proposal for decision, any party may file
exceptions to the hearing officer's proposal for decision.
(1) Such exceptions shall be in written form, addressed to the Chairman of the Commission,
and served upon all adverse parties;
(2) The exceptions shall list all the grounds upon which the exceptions are based.

I. If no exceptions are received by the Commission within the twenty (20) day period following
the mailing of the proposal for decision, the Commission shall issue a final decision.
J. If timely exceptions are received, the Commission shall send notice to the parties that the
appealing party(s) has thirty (30) days to submit a brief. Following the service of the appealing
party's brief, or upon the expiration of the thirty (30) day period, whichever shall occur first,
the other party shall have thirty (30) days to submit a brief. All briefs must be served on the
opposing parties and filed with the Commission.
K. Following receipt of all briefs, the Commission shall schedule an oral argument if requested to
do so by either party.
L. The request for an oral argument must be in writing, addressed to the Chairman of the
Commission, and submitted with that party's brief.
M. The oral argument shall be scheduled for the next regular Commission meeting following the
filing of the last brief.
N. The oral argument shall be heard by the members of the Commission present at the
Commission meeting and shall be held in accordance with the following format:
(1) The appealing party shall be given twenty minutes to present his case;
(2) The opposing party shall be given twenty minutes to present his case;
(3) The appealing party shall be given a rebuttal period of five minutes.

0. The parties by written stipulation may agree that the hearing officer's decision shall be final and
binding upon the parties.
P. The final order shall be issued by the Commission, and the decision of the Commission shall
represent the view of a majority of the Commission members voting on the appeal.
Q. The final order shall be written and shall comply with the provisions of Section 1-23-10 et. seq.
of the 1976 South Carolina Code of Laws.

72-314. Citizen Complaint Procedure on Delegated Program Components and Individual Sites.

A. Persons may become aggrieved by land disturbing activities and program implementation. The
following describes the procedure for a person to complain concerning program operation:
(1) If the program component in question has been delegated to a local implementing agency, the
complaint shall be registered first in writing with that agency. An attempt to resolve the
problem shall be made with the local implementing agency.
(2) In the event a solution can not be reached, the citizen may forward the complaint to the
Commission for review. The Commission shall attempt to resolve the problem with the
implementing agency and notify the citizen of the outcome of these efforts.
(3) If the Commission determines, based on complaints indicating a continuing pattern, that
implementation of delegated program elements falls below the acceptable standards established

by these regulations, the Commission may suspend or revoke the delegation in accordance with
R.72-304L.
(4) All complaints filed with the Commission shall be held for a period of three years and will be
considered when delegation renewal is requested by the local government.

B. Persons may complain about individual site problems or damages. The procedure is as follows:
(1) The complaint will be registered in writing with the appropriate implementing agency.
(2) If the implementing agency is not the Commission and a solution can not be reached with the
local implementing agency, the complaint should be filed with the Commission. The
Commission will follow procedures listed in R.72-312E.

72-315. Penalties.
A. Any person who violates any provision of this chapter or any ordinance or regulation
promulgated, enacted, adopted, or issued pursuant to this chapter by the Commission or other
implementing agency, or who initiates or continues a land disturbing activity for which a
stormwater management and sediment control plan is required except in accordance with the
terms, conditions, and provisions of an approved plan, is subject to a civil penalty of not more
than one thousand dollars. No penalty may be assessed until the person alleged to be in
violation has been notified of the violation. Each day of a violation constitutes a separate
violation.
B. The implementing agency shall determine the amount of the civil penalty to be assessed under
this section for violations under its jurisdiction. It shall make written demand for payment
upon the person responsible for the violation and set forth in detail the violation for which the
penalty has been invoked. If payment is not received or equitable settlement reached within
thirty days after demand for payment is made, a civil action may be filed in the circuit court in
the county in which the violation is alleged to have occurred to recover the amount of the
penalty. If the implementing agency is the commission, the action must be brought in the name
of the State. Local governments shall refer the matters under their jurisdiction to their
respective attorneys for the institution of a civil action in the name of the local government in
the circuit court in the county in which the violation is alleged to have occurred for recovery of
the penalty.

72-316. Severability.
If any section, subsection, sentence, clause, phrase, or portion of these regulations are for any
reason held invalid or unconstitutional by any court or competent jurisdiction, such provision and
such holding shall not affect the validity of the remaining portions of these regulations.
Fiscal Impact Statement:
The South Carolina Land Resources Commission estimates that two additional staff engineers will
be required to operate the program.

APPENDIX B

COASTAL ZONE MANAGEMENT PROGRAM

REFINEMENTS FOR STORMWATER MANAGEMENT

Chapter mI Management of Coastal Resources

C. Uses of Management Concern
3. 1Resource Policies
XIII. Stormwater Management Guidelines (Page 111-74)

Most land disturbing activities in South Carolina must comply with the requirements and
applicable regulations of the Erosion and Sediment Reduction Act of 1983 (48-18-10, et. seq.), or the
Stormwater Management and Sediment Reduction Act of 1991 (48-14-10, et. seq.). The final
regulations, effective on June 26, 1992, pursuant to the Stormwater Management and Sediment
Reduction Act of 1991, establish the procedure and minimum standards for a statewide stormwater
program. Section R.72-304F of the regulations states that "the S.C. Coastal Council ( knas
the Office of Ocean and Coastal Resource Management (OCRM), in coordination with the
Commission, will serve as the implementing agency for these regulations in the jurisdictions of the
local governments which do not seek delegation of program elements in the counties of Beaufort,
Berkeley, Charleston, Colleton, Dorchester, Georgetown, Horry and Jasper." In addition, Section
R.72-307C(5)(g)$ states that "For activities in the eight coastal counties, additional water quality
requirements may be imposed to comply with the S.C. Coastal Council (ICRM) Stormwater
Management Guidelines. If conflicting requirements exist for activities in the eight coastal counties,
the/S.C. Coastal Council (OCRM) guidelines will apply."

Pursuant to the Coastal Zone Management Act, the Coastal Council (OCRM) is responsible
for protecting the environmentally sensitive areas of our coast. While the regulations of the
Stormwater Management and Sediment Reduction Act adequately .address most nonpoint source
pollution problems, the need exists for establishing additional criteria to protect sensitive coastal
waters.

A. Stormwater Runoff Storage Requirements

The regulations of the Stormwater Management and Sediment Reduction Act require that
"permanent water quality ponds having a permanent pool shall be designed to store and release the
first 1/2 inch of runoff from the site over a 24-hour period. The storage volume shall be designed to
accommodate, at least, 1/2 inch of runoff from the entire site." For all projects, regardless of size,
which are located within one-half (1/2) mile of a receiving water body in the coastal zone, this criteria
shall be storage of the first 112 inch of runoff from the entire site or storage of the first one (1) inch of
runoff from the built-upon portion of the property, whichever is greater. Storage may be
accomplished through retention, detention or infiltration systems, as appropriate for the specific site.
In addition, for those projects which are located within 1,000 (one thousand) feet of shellfish beds, the
first one and one half (1 1/2) inches of runoff from the built-upon portion of the property must be
retained on site.
Receiving water bodies include all regularly tidally influenced salt and freshwater marsh areas,
all lakes or ponds which are used primarily for public recreation or a public drinking water supply,
and other water bodies within the coastal zone, excluding wetlands, swamps, ditches and stormwater
management ponds which are not contiguous via an outfall or similar structure with a tidal water body.

B. Project Size Requiring Stormwater Management Permits

Section R.72-305B(1) states that "for land disturbing activities involving two (2)\acres or less
of actual land disturbance which are. not part of a larger common plan of development or sale, the
person responsible for the land disturbing activity shall submit a simplified stormwater management
and sediment control plan meeting the requirements of R.72-307H. This plan does not require
preparation or certification by the designers specified in R.72-305H and R.72-305I." Due to the
potentially damaging effect of certain projects of less than two (2) acres of land disturbance,
stormwater management and sediment reduction plan submittal and regulatory approval shall be
required for those smaller projects located within 1/2 mile of a receiving water body. Single family
homes that are not part of a subdivision development are exempt from this requirement.

C. Stormwater Management Requirements for Bridge Runoff

The following is the criteria used to address stormwater management for bridges traversing
saltwater and/or critical areas.

1) No treatment is necessary for runoff from bridge surfaces spanning SB or SA waters. This
runoff can be discharged through scupper drains directly into surface waters. However, the
use of scupper drains should be limited as much as feasibly possible.

2) If the receiving water is either ORW or SFH then the stormwater management requirements
shall be based on projected traffic volumes and the presence of any nearby shellfish beds. The
following matrix lists the necessary treatment practices over the different classes of receiving
waters.

3) The Average Daily Traffic Volume (ADT) is based upon the design carrying capacity of the
bridge.

Average Daily Traffic Volume (ADT)

0-30,000 G.T. 30,000
ORW (within 1000 ft of
shellfish beds): *** ***
ORW (not within 1000 ft of
shellfish beds) ** **
Water SFH (within 1000 ft of
shellfish beds) ** ***
Quality SFH (not within 1000 ft of
shellfish beds) ** **
Class. SA * *
SB * *

*** The first one (1) inch of runoff from the bridge surface must be collected and routed to an
appropriate stormwater management system or routed so that maximum overland flow occurs
encouraging exfiltration before reaching the receiving body. Periodic vacuuming of the bridge surface
should be considered.

�** A stormwater management plan must be implemented which may require the overtreatment of
runoff from associated roadways to compensate for the lack of direct treatment of runoff from the
bridge surface itself. Periodic vacuuming should be considered. The use of scupper drains should be
limited as much as feasibly possible.

* No treatment is required. The use of scupper drains should be limited as much as feasibly possible.

D. Golf Courses Adjacent to Receiving Waterbodies

Golf course construction and maintenance practices result in the potential for significant
negative impacts from the runoff of sediments, pesticides, herbicides and other pollutants. For this
reason, when golf courses are constructed adjacent to receiving waterbodies then the following
practices are to be incorporated.

1) Minimum setbacks from the receiving water body of 20 feet for all manicured portions of the
golf course (fairways, greens and tees) are required unless other acceptable management
techniques are approved and implemented to mitigate any adverse impacts.

2) All drainage from greens and tees must be routed to interior lagoons or an equivalent
stormwater management system.

3) To prevent the conversion of the stormwater system to critical area and to maintain positive
drainage at high tides, all outfalls from the lagoon system must 'be located at an elevation
above the) critical area (if the discharge is to critical area) AND above the normal water
elevation a distance to allow for storage of the first one inch of runoff. The volume which
must be stored shall be calculated by multiplying the area of all the greens and tees by one
inch. (Previously constructed stormwater management systems which meet all current and
future storage requirements will not be required to modify outfalls.)

4) No greens or tees shall be located on marsh hummocks or islands unless all drainage can be
conveyed to the interior lagoon system or to an equivalent onsite stormwater management
system.

5) Stormwater impacts to freshwater wetlands shall be limited by providing minimum 20 foot
buffers, or an accepted alternative, between manicured areas (fairways, greens and tees) and.
the wetlands. This minimum buffer must be increased if land application of treated effluent is
utilized in the area.

6) An integrated pest management system designed in accordance with current best technology
practices must be employed on the course to limit the application of chemicals which, if over
applied, may leach into the ground and adjacent surface waters.

7) In accordance with S.C. Department of Health and Environmental Control requirements, a
two (2) foot separation must be maintained between the surface of the golf course and the
ground water table where spray effluent is applied.

8) The normal ground water elevation must be established by a registered engineer or soil
scientist.

9) All projects which are within 1000 feet of shellfish beds must retain the first 1 1/2 inches of
runoff as otherwise described in item A above.

10) If spray effluent or chemicals are applied to the turf via the irrigation system, all spray heads
must be located and set so as to prevent any aerosols from reaching adjacent critical areas.

E. Mines and Landfills

Due to the significant amount of land disturbance involved in the construction of mines and
landfills, these types of operations need to strictly adhere to sediment/erosion control requirements
particularly when they are located near coastal waterways. When mining or landfill projects are
located within 1/2 mile of receiving waterbodies, pumping of ground water from sediment basins must
be done with floating intakes only. Pumping of these basins must cease whenever the water levels
come to within two (2) feet of the pond bottom. In addition, landfill planning must be designed on a
comprehensive site basis for stormwater management and sediment/erosion control to include
management practices for each separate cell as it is phased into the landfill.

F. Notice of Approval

All notice of approval must be in written form.

APPENDIX C

NPDES GENERAL PERMIT FOR STORMWATER

DISCHARGES FROM CONSTRUCTION ACTIVITIES

SOUTH CAROLINA DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL

NPDES GENERAL PERMIT

for

STORM WATER DISCHARGES FROM CONSTRUCTION ACTIVITIES
THAT ARE CLASSIFIED AS "ASSOCIATED WITH INDUSTRIAL ACTIVITY"
BY EPA REGULATION

This permit authorizes storm water discharges to waters of the State South Carolina in accordance with the
monitoring requirements and other conditions set forth in Parts I through IX hereof. This permit is issued in
accordance with the provisions of the Pollution Control Act (S.C. Code Sections 48-1-10 et seq., 1976) and with
the provisions of the Federal Clean Water Act (PL 92-500), as amended, 33 U.S.C. 1251 et seq., the "CWA."

Director, Industrial and Agricultural Wastewater Division
Bureau of Water Pollution Control

Issued: Sentember 11. 1992 Expires: Sentember 30. 1997

Effective: October 1. 1992

Permit No.: SCR100000

TABLE OF CONTENTS

Part I. COVERAGE UNDER THIS PERMIT................................................................4
A. Permit Area ...................................4
B. Eligibility ......................4............................ .................4
C. Authorization; ..................................................................................5

Part II. NOTICE OF INTENT REQUIREMENTS ..............................................6
A. Deadlines for Notification ..........................6......... .............6
B. Contents of Notice of Intent ..................................................................
C. Where to Submit ..........................................................................7
D. Renotification ................................. .........7......

Part mRI. SPECIAL CONDITIONS, MANAGEMENT PRACTICES, AND OTHER
NON-NUMERIC LIMITATIONS.............. ..............................................7
A. Prohibition on non-storm water discharges...............................................7
B. Releases in excess of Reportable Quantities ...............................................7

Part IV. STORM WATER POLLUTION PREVENTION PLANS . .......................................8
A. Deadlines for Plan Preparation and Compliance ........................................ 8
B. Signature and Plan Review .......................8...
C. Keeping Plans Current . .......................................................................9
D. Contents of Plan .............................................................. 9
E. Contractors.................1....... 12

Part V. RETENTION OF RECORDS ..............................12

Part VI. STANDARD PERMIT COND ITIONS...............................................................12
A. Duty to Comply ............................. 12
B. Continuation of the Expired General Permit ..............................................13
C. Need to halt or reduce activity not a defense .................. ............13
D. Duty to Mitigate...............................................................................13
E. Duty to Provide Information ................................. 13
F. Other Information .. ..........................................................13
G. Signatory Requirements ..............................13
H. False Statements, Representations or Certifications Falsifying Tampering
with or rendering Inaccurate .............................14
Monitoring Devices or Methods...............................................................14
I. Oil and Hazardous Substance Liability ........................................14
J. Property Rights ....................;.....14...
K. Severability ........................................................................................ 14
L. . Requiring an individual permit or an alternative general permit ..........................14
M. State/Environmental Laws ................................ 15
N. Proper Operation and Maintenance............................................................15
0. Inspection and Entry .........................................................................15
P. f Permit Actions............................................ ......................................16
P. Permit Actions. ............. 16
Q. Areawide Water Quality Management Plan Conformance ...........1....................16

Part VII. REOPENER CLAUSE ..........................................................................16

Part VIII.TERMINATION OF COVERAGE ................................. 16
A. Notice of Termination ............................................................................16
B. Addresses...... ......................................................................................17

Part IX. DEFINITIONS............... ................................................................................17

PREFACE

The CWA provides that storm water discharges associated with industrial activity from a point source (including
discharges through a municipal separate storm sewer system) to waters of the United States are unlawful, unless
authorized by a National Pollutant Discharge Elimination System (NPDES) permit. The terms "storm water discharge
associated with industrial activity", "point source" and "waters of the United States" are critical to determining
whether a facility is subject to this requirement. Complete definitions of these terms are found in the definition
section (Part IX) of this permit.

Part I. COVERAGE UNDER THIS PERMIT

A. Permit Area. The permit covers all areas of South Carolina.

B. Eligiblitl.

1. This permit may authorize all discharges of storm water associated with industrial activity from
construction sites, (by present EPA regulation this is sites or common plans of development or sale
that will result in the disturbance of five or more acres total land area, however this may be
reduced to less than five acres1 ), (henceforth referred to as storm water discharges from
construction activities) occurring after the effective date of this permit (including discharges
occurring after the effective date of this permit where the construction activity was initiated before
the effective date of this permit), except for discharges identified under paragraph I.B.3.

2. This permit may only authorize a storm water discharge associated with industrial activity from a
construction site that is mixed with a storm water discharge from an industrial source other than
construction, where:

a. the industrial source other than construction is located on the same site as the construction
activity;

b. storm water discharges associated with industrial activity from the areas of the site where
construction activities are occurring are in compliance with the terms of this permit; and

c. storm water discharges associated with industrial activity from the areas of the site where
industrial activity other than construction are occurring (including storm water discharges from
dedicated asphalt plants and dedicated concrete plants) are covered by a different NPDES general
permit or individual permit authorizing such discharges.

3. Limitations on Coverage. The following storm water discharges from construction sites are not
authorized by this permit:

a. storm water discharges associated with industrial activity that originate from the site after
construction activities have been completed and the site has undergone final stabilization.

b. discharges that are mixed with sources of non-storm water other than discharges which are
identified in Part III.A of this permit and which are in compliance with Part IV.D.5 (non-storm
water discharges) of this permit.

c. storm water discharges associated with industrial activity that are subject to an existing NPDES
individual or general permit or which are issued a permit in accordance with paragraph VI.L
(requiring an individual permit or an alternative general permit) of this permit. Such discharges
may be authorized under this permit after an existing permit expires provided the existing permit
did not establish numeric limitations for such discharges;

On June 4, 1992, the United States Court of Appeals for the
Ninth Circuit remanded the exemption for construction sites of
less than five acres to the EPA for further rulemaking. (Nos. 90-
70671 and 91-70200). When this issue is resolved, this permit
will be administratively modified without further public notice to
be in compliance with the final EPA regulation.

d. storm water discharges from construction sites that the Department has determined to be or may
reasonably be expected to be contributing to a violation of a water quality standard; and

e. storm water discharges from construction sites if the discharge or the clearing activities are
likely to adversely effect a listed endangered or threatened species or its critical habitat.

C. Authorization .

1. A discharger must submit a Notice of Intent (NOI) in accordance with the requirements of Part II of this
permit, using a NOI form provided by the Department (or a photocopy thereof), in order for storm water
discharges from construction sites to be authorized to discharge under this general permit.

2. All contractors and subcontractors of the owner/operator whose activities at the site may impact storm water
discharges or controls at the site along the duration of the project, shall sign a copy of the certification
statement given below:

"I certify by my signature below that I accept the terms and conditions of the Storm Water
Pollution Prevention Plan (SWPPP) as required by: the general National Pollutant
Discharge Elimination System (NPDES permit number SCR100000) issued to the
owner/operator of the construction activity for which I have been contracted to perform
construction related professional services. Further, by my signature below, I understand
that I am becoming a co-permittee with the owner/operator and other contractors that have
become co-permittes to the general NPDES permit issued to the owner/operator of the
facility for which I have been contracted to perform professional construction services.
As a co-permittee, I understand that I, and my company, as the case may be, are legally
accountable to the SC Department of Health and Environmental Control (DHEC), under
the authorities of the CWA and the SC Pollution Control Act, to ensure compliance with
the terms and conditions of the SWPPP. I also understand that DHEC enforcement
actions may be taken against any specific co-permittee or combination of co-permittees if
the terms and conditions of the SWPP are not met. Therefore, having understood the
above information, I am signing this certification and am receiving co-permittee status to
the aforementioned general NPDES permit." The date of the signature, the title of the
person providing the signature, and the name, address, and telephone number of the
contracted firm, shall also be provided.: In the event the SWPPP is amended by the
'owner, such amendments should be incorporated to the plan and the contractors and
subcontractors should acknowledge by signature.

The signatory requirements of 40 CFR 122.22, as provided in Part VI.G of this permit are applicable to
each contracted entity that must sign the contractor's certification statement. Upon signing the certification,
the contractor is a co-permittee and becomes accountable to the Department to ensure the terms and
conditions of this permit are implemented. All co-permitttes are subject to Department enforcement actions
if permit conditions are not met. Enforcement actions may be taken against any specific co-permittee or
combination of co-permittees, with consideration given to the party responsible for the violation. The
owner/operator submitting the NOI shall retain all contractor certifications for at least three years after a
contractor has completed work at the site. Copies of all contractor certifications and a copy of this permit
shall be retained on the site of the construction activity. The owner/operator of the facility covered by this
permit shall make all contractor certifications available upon request to the Department.

3. Unless notified by the Department to the contrary, dischargers who submit an NOI in accordance with the
requirements of this permit are authorized to discharge storm water from construction sites under the terms
and conditions of this permit 48 hours after the date that the NOI is postmarked. The Department may deny
coverage under this permit and require submittal of an application for an individual NPDES permit based on
a review of the NOI or other information (see Part VI.L of this permit). This denial can be made at any
time after the submittal of the NOI and does not have to be made within 48 hours after the date the NOI is
postmarked.

:~~~~~~~

Part II. NOTICE OF INTENT REQUIREMENTS

A. Deadlines for Notification.

1. Except as provided in paragraphs II.A.2, II.A.3, and II.A.4, individuals who intend to obtain coverage for
storm water discharges from a construction site (where disturbances associated with the construction project
begin after October 1, 1992), under this general permit shall submit a Notice of Intent (NOI) in accordance
with the requirements of this Part at least 48 hours prior to the commencement of construction at any site or
common plan of development or sale that will result in the disturbance of five or more acres total land area
(NOTE: see footnote 1 in Part I.B.:1);

2. For storm water discharges from a construction site where disturbances associated with construction
activities have occurred before or on October 1, 1992 and continued after that date, NOIs in accordance with
the requirements of this Part shall be submitted on or before October 1, 1992;

3. For storm water discharges from construction sites where the owner/operator changes, a new NOI in
accordance with the requirements of this Part shall be submitted at least 48 hours prior to when the new
owner/operator begins work at the site; and

4. : A discharger is not precluded from submitting an NOI in accordance with the requirements of this part after
the dates provided in Parts II.A.1, 2 or 3 of this permit. In such instances, the Department may bring an
enforcement action for failure to submit an NOI in a timely manner or for any unauthorized discharges of
storm water associated with industrial activity that have occurred on or after the dates specified in Part
II.A. 1, 2 and 3.

B. Contents of Notice of Intent. The Notice of Intent shall be signed in accordance with Part VI.G of this
permit by all of the entities identified in Part II.B.3 and shall include the following information:

1. The mailing address, and location of the construction site for which the notification is submitted. Where a
mailing address for the site is not available, the location can be described in terms of the latitude and
longitude of the approximate center of the facility to the nearest 15 seconds that the construction site is
located in;

2. The owner's name, address, telephone number, and status as Federal, State, private, public or other entity.

3. The name, address and telephone number of the operators with day to day operational control that have been
identified at the time of the NOI submittal;

4. The name of the receiving water(s), or if the discharge is through a municipal separate storm sewer, the
name of the municipal operator of the storm sewer and the ultimate receiving water(s);

5. The number of any NPDES permit for any discharge (including non-storm water discharges) from the site
that is currently authorized by an NPDES permit.

6. An indication of whether the owner or operator has existing quantitative data 'which describes the
concentration of pollutants in storm water discharges (existing data should not be included as part of the
NOI); and

7. An estimate of project start date and completion date, estimates of the number of acres of the site on which
soil will be disturbed, and a certification that a storm water pollution prevention plan has been prepared for
the facility in accordance with Part IV of this permit, and such plan, as a part of the construction documents,
' provides compliance with any state or local sediment and erosion plans or permits.
(A copy of the plans or permits should not be included with the NOI submission).

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C. Where to Submit.

1. Facilities which discharge storm water associated with industrial activity must use a NOI form provided by
the Department (or photocopy thereof). Forms are available by calling (803) 734-5300. NOIs must be
signed in accordance with Part VI.G of this permit. NOIs are to be submitted to the Department at the
following address:

SC Department of Health and Environmental Control
NPDES/ND Permit Administration
Storm Water Notice of Intent for Construction
2600 Bull Street
Columbia, S. C. 29201

2. A copy of the NOI or other indication that storm water discharges from the site are covered under an
NPDES permit, and a brief description of the project shall be posted at the construction site in a prominent
place for public viewing (such as alongside a building permit).

D. Renlflication. Upon issuance of a new general permit, the permittee is required to notify the Department
of his or her intent to be covered by the new general permit.

Part m. SPECIAL CONDITIONS, MANAGEMENT PRACTICES, AND OTHER
NON-NUMERIC LIMITATIONS

A. Prohibition on non-storm water discharges.

1. Except as provided in paragraph I.B.2 and II.A.2, all discharges covered by this permit shall be composed
entirely of storm water.

2. a. Except as provided in paragraph III.A.2.b, discharges of material other than storm water must be in
compliance with a NPDES permit (other than this permit) issued for the discharge.

b. The following non-storm water discharges may be authorized by this permit provided the non-storm water
component of the discharge is in compliance with paragraph IV.D.3.g: discharges from fire fighting
activities; fire hydrant flushings; waters used to wash vehicles or control dust in accordance with Part
IV.D.2.c.(2); potable water sources including waterline flushings; irrigation drainage; routine external
building

washdown which does not use detergents; pavement washwaters where spills or leaks of toxic or hazardous
materials have not occurred (unless all spilled material, has been removed) and where detergents are not
used; air conditioning condensate; springs; uncontaminated ground water; and foundation or footing drains
where flows are not contaminated with process materials such as solvents.

B. Releases in excess of Renortahble Ouantities.

1. The discharge of hazardous substances or oil in the storm water discharge(s) from a facility shall be
prevented or minimized in accordance with the applicable storm water pollution prevention plan for the
facility. This permit does not relieve the permittee of the reporting requirements of 40 CFR part 117 and 40
CFR part 302. Where a release containing a hazardous substance in an amount equal to or in excess of a
reporting quantity established under either 40 CFR 117 or 40 CFR 302, occurs during a 24 hour period:

a. The permittee is required to notify by telephone both the Department's Emergency Response Section at
(803) 253-6488 and the National Response Center (NRC) at (800) 424-8802 in accordance with the
requirements of 40 CFR 117 and 40 CFR 302 as soon as he or she has knowledge of the discharge;

b. The permittee shall submit within 14 calendar days of knowledge of the release a written description of:
the release (including the type and estimate of the amount of material released), the date that such release
occurred, the circumstances leading to the release, and steps to be taken in accordance with Part III.B.3 of
this permit to both EPA Region IV, 345 Courtland Street, N.E., Atlanta, Ga. 30365 and the SC Department
of Health and Environmental Control, Emergency Response Section, 2600 Bull Street Columbia, S.C.
29201; and

c. The storm water pollution prevention plan required under Part IV of this permit must be modified within
14 calendar days of knowledge of the release to: provide a description of the release, the circumstances
leading to the release, and the date of the release. In addition, the plan must be reviewed to identify
measures to prevent the reoccurrence of such releases and to respond to such releases, and the plan must be
modified where appropriate.

2. sp1i2&. This permit does not authorize the discharge of hazardous substances or oil resulting from an on-site
spill.

Part IV. STORM WATER POLLUTION PREVENTION PLANS

A storm water pollution prevention plan shall be developed for each construction site covered by this permit.
Storm water pollution prevention plans shall be prepared in accordance with good engineering practices.
The plan shall identify potential sources of pollution which may reasonably be expected to affect the quality
of storm water discharges from the construction site. In addition, the plan shall describe and ensure the
implementation of practices which will be used to reduce the pollutants in storm water discharges associated
with industrial activity at the construction site and to assure compliance with the terms and conditions of this
permit. Facilities must implement the provisions of the storm water pollution prevention plan required
under this part as a condition of this permit.

A. Deadlines for Plan Prenaration and Comnliance.

The plan shall:

01. - XBe completed prior to the submittal of an NOI to be covered under this permit and updated as appropriate;

2. For construction activities that have begun on or before October 1, 1992, the plan shall provide for
compliance with the terms and schedule of the plan beginning on October 1, 1992;

3. For construction activities that have begun after October 1, 1992, the plan shall provide for compliance with
the terms and schedule of the plan beginning with the initiation of construction activities.

B. Sionature and Plan Review

1.0 The plan shall be signed in accordance with Part VI.G, and be retained on-site at the facility which generates
the storm water discharge in accordance with Part V (retention of records) of this permit. Whenever this
could not possibly be accomplished, the location of the plan should be determined. Such determination
should be included in the plan.

2. The permittee shall make plans available to the Department upon-request or in the case of a storm water
discharge associated with industrial activity which discharges through a municipal separate storm sewer
system with an NPDES permit, to the municipal operator of the system.

3. The Department may notify the permittee at any time that the plan does not meet one or more of the
minimum requirements of this Part. Within 7 days of such notification from the Department, (or as
otherwise provided by the Department), the permittee shall make the required changes to the plan and shall
submit to the Department a written certification that the requested changes have been made.

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C. Keeninr Plans Current. The permittee shall amend the plan whenever there is a change in design,
construction, operation, or maintenance, which has a significant effect on the potential for the discharge of
pollutants to surface waters of South Carolina and which has not otherwise been addressed in the plan or if
the storm water pollution prevention plan proves to be ineffective in eliminating or significantly minimizing
pollutants from sources identified under Part IV.D.2 of this permit, or in otherwise achieving the general
objectives of controlling pollutants in storm water discharges associated with industrial activity.
Amendments to the plan may be reviewed by the Department in the same manner as Part IV.B above. Plan
records should be.updated periodically to reflect the certification that new contractors and subcontractors
have signed.

D. Contents of Plan. The storm water pollution prevention plan shall include the following items:

1. Site Descriotion. Each plan shall, provide a description of pollutant sources and other information as
indicated:

a. A description of the nature of the construction activity;

b. A description of the intended sequence of major activities which disturb soils for major portions of the
site (e.g. grubbing, excavation, grading);

c. Estimates of the total area of the site and the total area of the site that is expected to be disturbed by
excavation, grading, or other activities;

d. An estimate of the runoff coefficient of the site after construction activities are completed and existing
data describing the soil or the quality of any discharge from the site;

e. A site map indicating drainage patterns and approximate slopes anticipated after major grading activities,
areas of soil disturbance, the location of major structural and nonstructural controls identified in the plan, the
location of areas where stabilization practices are expected to occur, surface waters (including wetlands),
and locations where storm water is discharged to surface waters; and

f. The name of the receiving water(s) and the ultimate receiving water(s), and areal extent of wetland
acreage at the site.

2. Controls. Each plan shall include a description of appropriate controls and measures that will be
implemented at the construction site. The plan will clearly describe for each major activity identified in Part
IV.D.l.b appropriate control measures and the timing during the construction process that the measures will
be implemented. (For example, perimeter controls for one portion of the site will be installed after the
clearing and grubbing necessary for installation of the measure, but before the clearing and grubbing for the
remaining portions of the site. Perimeter controls will be actively maintained until final stabilization of those
portions of the site upward of the perimeter control. Temporary perimeter controls will be removed after
final stabilization). The description and implementation of controls shall address the following minimum
components:

a. Erosion and Sediment Controls.

(1). Stabilization Practices. A description of interim and permanent stabilization practices, including site-
specific scheduling of the implementation of the practices. Site plans should ensure that existing vegetation
is preserved where attainable and that disturbed portions of the site are stabilized. Stabilization practices
may include: temporary seeding, permanent seeding, mulching, geotextiles, sod stabilization, vegetative
buffer strips, protection of trees, preservation of mature vegetation, and other appropriate measures. A
record of the dates when major grading'activities occur, when construction activities temporarily or
permanently cease on a portion of the site, and when stabilization measures are initiated shall be included in
the plan. Except as provided in paragraphs V.D.2.(a).(l).(a), and (b) below, stabilization measures shall

be initiated as soon as practicable in portions of the site where construction activities have temporarily or
permanently ceased, but in no case more than 14 days after the construction activity in that portion of the
site has temporarily or permanently ceased.

(a). Where the initiation of stabilization measures by the 14th day after construction activity temporary or
permanently cease is precluded by snow cover, stabilization measures shall be initiated as soon as
practicable.

(b). Where construction activity will resume on a portion of the site within 21 days from when activities
ceased, (e.g. the total time period that construction activity is temporarily ceased is less than 21 days) then
stabilization measures do not have to be initiated on that portion of site by the 14th day after construction
activity temporarily ceased.

(2). Structural Practices. A description of structural practices to divert flows, from exposed soils, store
flows or otherwise limit runoff and the discharge of pollutants from exposed areas of the site to the degree
attainable. Such practices may include silt fences, earth dikes, drainage swales, sediment traps, check dams,
subsurface drains, pipe slope drains, level spreaders, storm drain inlet protection, rock outlet protection,
reinforced soil retaining systems, gabions, and temporary or permanent sediment basins. Structural practices
should be placed on upland soils to the degree attainable. The installation of these devices may be subject to
Section 404 of the CWA.

(a) For common drainage locations that serve an area with 10 or more disturbed acres at one time, a
temporary (or permanent) sediment basin providing 3,600 cubic feet of storage per acre drained, or
equivalent control measures, shall be provided where attainable until final stabilization of the site. The
3,600 cubic feet of storage area per acre drained does not apply to flows from offsite areas and flows from
onsite areas that are either undisturbed or have undergone final stabilization where such flows are diverted
around the sediment basin. For drainage locations which serve 10 or more disturbed acres at one time and
where a temporary sediment basin providing 3,600 cubic feet of storage per acre drained, or equivalent
controls is not attainable smaller sediment traps and/or sediment basins should be used. At a minimum, silt
fences, or equivalent sediment controls are required for all sideslope and downslope boundaries of the
construction area.

(b) For drainage locations serving less than 10 acres, sediment basins and/or sediment traps, silt fences or
equivalent sediment controls are required for all sideslope and downslope boundaries of the construction area
unless a sediment basin providing storage for 3,600 cubic feet of storage per acre drained is provided.

b. Storm Water Management. A description of measures that will be installed during the construction
process to control pollutants in storm water discharges that will occur after construction operations have
been completed. Structural measures should be placed on upland soils to the degree attainable. The
installation of these devices may be subject to Section 404 of the CWA. This permit only addresses the
installation of storm water management measures, and not the ultimate operation and maintenance of such
structures after the construction activities have been completed and the site has undergone final stabilization.
Permittees are only responsible for the installation and maintenance of storm water management measures
prior to final stabilization of the site, and are not responsible for maintenance after storm water discharges
associated with industrial activity have been eliminated from the site.
(1). Such practices may include: storm water detention structures (including wet ponds); storm water
retention structures; flow attenuation by use of open vegetated swales and natural depressions; infiltration of
runoff onsite; and sequential systems,(which combine several practices). The Storm Water Pollution
Prevention Plan shall include an explanation of the technical basis used to select the practices to control
pollution where flows exceed predevelopment levels.

(2). Velocity dissipation devices shall be placed at discharge locations and along the length of any outfall
channel as necessary to provide a non-erosive velocity flow from the structure to a water course so that the
natural physical and biological characteristics and functions are maintained and protected (e.g. no significant
changes in the hydrological regime of the receiving water).

C: g 0: S f S : 71 0 0;-:

c. Other Controls.

(1). Waste Disposal. No solid materials, including building materials, shall be discharged to waters of
South Carolina, except as authorized by a Section 404 permit.

(2). Off-site vehicle tracking of sediments and the generation of dust shall be minimized.

(3). The plan shall ensure and demonstrate compliance with applicable State and/or local waste disposal,
sanitary sewer or septic system regulations.

d. Annroved State or Local Plans.

(1). Permittees which discharge storm water associated with industrial activity from construction activities
must include in their storm water pollution prevention plan procedures and requirements specified in
applicable sediment and erosion site plans or site permits, or storm water management site plans or site
permits approved by State or local officials. Permittees shall provide a certification in their storm water
pollution prevention plan that their storm water prevention plan reflects requirements applicable to protecting
surface water resources in sediment and erosion site plans or site permits approved by State or local
officials. Permittee shall comply with any such requirements during the term of the permit. This provision
does not apply to provisions of master plans, comprehensive plans, non-enforceable guidelines or technical
guidance documents that are not identified in a specific plan or permit that is issued for the construction site.

(2). Storm water pollution prevention plans must be amended to reflect any change applicable to protecting
surface water resources in sediment and erosion site plans or site permits, or storm water management site
plan or site permits approved by State or local officials for which the permittee receives written notice.
Where the permittee receives such written notice of a change, the permittee shall provide a recertification in
the storm water pollution plan that the storm water pollution prevention plan has been modified to address
such changes.

3. Maintenan. A description of procedures to ensure the timely maintenance of vegetation, erosion and
sediment control measures and other protective measures identified in the site plan in good and effective
operating condition.

4. In ctions. Qualified personnel (provided by the discharger) shall inspect disturbed areas of the
construction site and areas used for storage of materials that are exposed to precipitation that have not been
finally stabilized, structural control measures, and locations where vehicles enter or exit the site at least once
every seven calendar days and within 24 hours of the end of a storm that is 0.5 inches or greater. Where
sites have been finally stabilized such inspection shall be conducted at least once every month.

a. Disturbed areas and areas used for storage of materials that are exposed to precipitation shall be inspected
for evidence of, or the potential for, pollutants entering the drainage system. Erosion and sediment control
measures identified in the plan shall be observed to ensure that they are operating correctly. Where
discharge locations or points are accessible, they shall be inspected to ascertain whether erosion control
measures are effective in preventing significant impacts to receiving waters. Locations where vehicles enter
or exit the site shall be inspected for evidence of offsite sediment tracking.

b. Based on the results of the inspection, the site description identified in'the plan in accordance with
paragraph IV.D.I of this permit and pollution prevention measures identified in the plan in accordance with
paragraph IV.D.2 of this permit shall be revised as appropriate, but in no case later than 7 calendar days
following the inspection. Such modifications shall provide for timely implementation of any changes to the
plan within 7 calendar days following the inspection.

c. A report summarizing the scope of the inspection, name(s) and qualifications of personnel making the
inspection, the date(s) of the inspection, major observations relating to the implementation of the storm
water pollution prevention plan, and actions taken in accordance with paragraph IV.D.4.b of the permit shall

be made and retained as part of the storm water pollution prevention plan for at least three years from the
date that the site is finally stabilized. Such reports shall identify any incidents of non-compliance. Where a
report does not identify any incidents of non-compliance, the report shall contain a certification that the
facility is in compliance with the storm water pollution prevention plan and this permit. The report shall be
signed in accordance with Part VI.G of this permit.

5. Non-Storm Water Discharges - Except for flows from fire fighting activities, sources of non-storm water
listed in Part III.A.2 of this permit that are combined with storm water discharges associated with industrial
activity must be identified in the plan. The plan shall identify and ensure the implementation of appropriate
pollution prevention measures for the non-storm water component(s) of the discharge.

E. Contractors

1. The storm water pollution prevention plan must clearly identify for each measure identified in the plan, the
contractor(s) and/or subcontractor(s) that will implement the measure. All contractors and subcontractors
identified in the plan must sign a copy of the certification statement in Part I.C.2 of this permit in
accordance with Part VI.G of this permit. All certifications must be included in the storm water pollution
prevention plan.

Part V. RETENTION OF RECORDS

A. The permittee shall retain copies of storm water pollution prevention plans and all reports required by this
permit, and records of all data used to complete the Notice of Intent to be covered by this permit, for a
period of at least three years from the date that the site is finally stabilized. This period may be extended by
request of the Department at any time.

B. If at all possible, the permittee shall retain a copy of the storm water pollution prevention required by this
permit at the construction site from the date of project initiation to the date of final stabilization. If not
possible, then, a place to keep the SWPPP must be designated in the plan itself.

C. Addresses. All written correspondence under this permit shall be directed to the Department at the
following address:

SC Department of Health and Environmental Control
NPDES/ND Permit Administration
Storm Water Permitting
2600 Bull Street
Columbia, SC 29201

Part VI. STANDARD PERMIT CONDITIONS

A. YDut to Com&iv.

1. The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a
violation of the S.C. Pollution Control Act and the CWA and is grounds for enforcement action; for permit
termination, revocation and reissuance, or modification; or for denial of a permit renewal application.

2. Penalties for Violations of Permit Conditions.

a. Any person who violates a term or condition contained within this permit is subject to the action defined
by Sections 48-1-320 and 48-1-330 of the S.C. Pollution Control Act.

b. Nothing in this permit shall be construed to relieve the permittee from civil or criminal penalties for non-
compliance.

B. Continuation of the Exnired General Permit.

This permit expires on September 30, 1997. However, an expired general permit continues in force and
effect until a new general permit is issued. Permittees must submit a new NOI in accordance with the
requirements of Part II of this permit, using a NOI form provided by the Department (or photocopy thereof)
between August 1, 1997 and September 28, 1997 to remain covered under the continued permit after
October 1, 1997. Facilities that had not obtained coverage under the permit by October 1, 1997 cannot
become authorized to discharge under the continued permit.

C. Need to halt or reduce activity not a defense. It shall not be a defense for a permittee in an enforcement
action that it would have been necessary to halt or reduce the permitted activity in order to maintain
compliance with the conditions of this permit.

D. Dutyto Mitigate. The permittee shall take all reasonable steps to minimize or prevent any discharge in
violation of this permit which has a reasonable likelihood of adversely affecting human health or the
environment.

E. Dutv to Provide Information. The permittee shall furnish to the Department or in the case of a storm water
discharge associated with industrial activity which discharges through a municipal separate storm sewer
system with an NPDES permit, to the municipal operator of the system, any information which is requested
to determine compliance with this permit or other information.

F. Other Information. When the permittee becomes aware that he or she failed to submit any relevant facts
or submitted incorrect information in the Notice of Intent or in any other report to the Department, he or she
shall promptly submit such facts or information.

G. Sinmatorv Reauirements. All Notices of Intent, storm water pollution prevention plans, reports,
certifications or information either submitted to the Department or the operator of a large or medium
municipal separate storm sewer system, or that this permit requires be maintained by the permittee, shall be
signed as follows:

1. All Notices of Intent shall be signed as follows:

a. For a corporation: by a responsible corporate officer. For the purpose of this section, a responsible
corporate officer means: (1) a president, secretary, treasurer, or vice-president of the corporation in charge
of a principal business function, or any other person who performs similar policy or decision-making
functions for the corporation; or (2) the manager of one or more manufacturing, production or operating
facilities employing more than 250 persons or having gross annual sales or expenditures exceeding
$25,000,000 (in second-quarter 1980 dollars) if authority to sign documents has been assigned or delegated
to the manager in accordance with corporate procedures;

b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively; or

c. For a municipality, State, Federal, or other public agency: by either a principal executive officer or
ranking elected official. For purposes of this section, a principal executive officer of a Federal agency
includes (1) the chief executive officer of the agency, or (2) a senior executive officer having responsibility
for the overall operations of a principal geographic unit of the agency (e.g., Regional Administrators of
EPA).

2. All reports required by the permit and other information requested by the Department shall be signed by
a person described above or by a duly authorized representative of that person. A person is a duly authorized
representative only if:-

a. The authorization is made in writing by a person described above and submitted to the Department.

b. The authorization specifies either an individual or a position having responsibility for the overall
operation of the regulated facility or activity, such as the position of manager, operator, superintendent, or
/ position of equivalent responsibility or an individual or position having overall responsibility for
environmental matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position).

c. Changes to authorization. If an authorization under Part II.B.3. is no longer accurate because a
different operator has responsibility for the overall operation of the construction site, a new notice of intent
satisfying the requirements of Part II.B must be submitted to the Department prior to or together with any
reports, information, or applications to be signed by an authorized representative.

d. Certification. Any person signing documents under paragraph VI.G shall make the following
certification:

'I certify under penalty of law that this document all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations."

H. False Statements. Renresentations or Certifications Falsifvina Tamnerina with or Rendering
Inaccurate Monitoring Devices or Methods

Section 48-1-340 of the S.C. Pollution Control Act provides that any person who knowingly makes any false
statement, representation, or certification in an application, record, report, plan or other document filed or
required to be maintained under this permit or who falsifies, tampers with or knowingly renders inaccurate
any monitoring device or method required to be maintained by this permit, shall be subject to the civil or
criminal provisions of Sections 48-1-320 and 48-1-330 of the Pollution Control Act.

I. Oil and Hazardous Substance Liabilitv. Nothing in this permit shall be construed to preclude the
institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to
which the permittee is or may be subject under Section 311 of the CWA, Section 106 of CERCLA, the S.C.
Pollution Control Act, or applicable provisions of the S.C. Hazardous Waste Management Act and the S.C.
Oil and Gas Act.

J. r.o erty Rights. The issuance of this permit does not convey any property rights of any sort, nor any
exclusive privileges, nor does it authorize any injury to private property nor any invasion of personal rights,
nor any infringement of Federal, State or local laws or regulations.

K. Severability. The provisions of this permit are severable, and if any provision of this permit, or the
application of any provision of this permit to any circumstance, is held invalid, the application of such
provision to other circumstances, and the remainder of this permit shall not be affected thereby.

L. Reauirina an individual nermit or an alternative general nermit.

1. The Department may require any person authorized by this permit to apply for and/or obtain either an
individual NPDES permit or an alternative NPDES general permit. Any interested person may petition the
Department to take action under this paragraph. Where the Department requires a discharger authorized to
discharge under this permit to apply for an individual NPDES permit, the Department shall notify the
discharger in writing that a permit application is required. This notification shall include a brief statement of

the reasons for this decision, an application form, a statement setting a deadline for the discharger to file the
application, and a statement that on the effective date of the individual NPDES permit or the alternative
general permit as it applies to the individual permittee, coverage under this general permit shall
automatically terminate. Applications shall be submitted to the Department at the address indicated in Part
V.C of this permit. The Department may grant additional time to submit the application upon request of the
applicant. If a discharger fails to submit in a timely manner an individual NPDES permit application as
required by the Department under this paragraph, then the applicability of this permit to the individual
NPDES permittee is automatically terminated at the end of the day specified by the Department for
application submittal.

2. Any discharger authorized by this permit may request to be excluded from the coverage of this permit by
applying for an individual permit. In such cases, the permitte shall submit an individual application in
accordance with the requirements of 40 CFR 122.26(c)(1)(ii), with reasons supporting the request, to the
Department at the address in Part V.C of this permit. The request may be granted by issuance of an
individual permit or an alternative general permit if the reasons cited by the permittee are adequate to
support the request.

3. When an individual NPDES permit is issued to a discharger otherwise subject to this permit, or the
discharger is authorized to discharge under an alternative NPDES general permit, the applicability of this
permit to the individual NPDES permittee is automatically terminated on the effective date of the individual
permit or the date of authorization of coverage under the alternative general permit, whichever the case may
be. When an individual NPDES permit is denied to a discharger otherwise subject to this permit, or the
discharger is denied for coverage under an alternative NPDES general permit, the applicability of this permit
to the individual NPDES permittee remains in effect, unless otherwise specified by the Department.

M. State/Environmental lIaws.

I. Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the
permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State law
or regulation under authority preserved by section 510 of the CWA.

2. No condition of this permit shall release the permittee from any responsibility or requirements under other
environmental statutes or regulations.

N. Proner Oneration and Maintenance. The permittee shall at all times properly operate and maintain all
facilities and systems of treatment and control (and related appurtenances) which are installed or used by the
permittee to achieve compliance with the conditions of this permit and with the requirements of storm water
pollution prevention plans. Proper operation and maintenance also includes adequate laboratory controls and
appropriate quality assurance procedures. Proper operation and maintenance requires the operation of
backup or auxiliary facilities or similar systems, installed by a permittee only when necessary to achieve
compliance with the conditions of the permit.

O. Insnection and Entry. The permittee shall allow the Department or in the case of a construction site
which discharges through a municipal separate storm sewer, an authorized representative of the municipal
operator or the separate storm sewer receiving the discharge, upon the presentation of credentials and other
documents as may be required by law, to:

1. Enter upon the permittee's premises where a regulated facility or activity is located or conducted or where
records must be kept under the conditions of this permit;
2. Have access to and copy at reasonable times, any records that must be kept under the conditions of this
permit; and

3. Inspect at reasonable times any facilities or equipment (including monitoring and control equipment).

P. Permit Actions. This permit may be modified, revoked and reissued, or terminated for cause. The filing
of a request by the permittee for a permit modification, revocation and reissuance, or termination, or a
notification of planned changes or anticipated noncompliance does not stay any permit condition.

Q. Areawide Water Oualitv Manaement Plan Conformance. All storm water discharges from construction
sites given coverage under this general permit are in compliance with the appropriate Areawide Water
Quality Management Plan prepared pursuant to Section 208 of the CWA.

Part VII. REOPENER CLAUSE

A. If there is evidence indicating potential or realized impacts on water quality due to any storm water
discharge associated with industrial activity covered by this permit, the discharger may be required to obtain
an individual permit or an alternative general permit in accordance with Part I.C of this permit or the permit
may be modified to include different limitations and/or requirements.

B. Permit modification or revocation will be conducted according to S.C. Regulation 61-9.

Part VIII. TERMINATION OF COVERAGE

A. Notice of Termination. Where a site has been finally stabilized and all storm water discharges from
construction activities that are authorized by this permit are eliminated, the operator of the facility may
submit a Notice of Termination that is signed in accordance: with Part VI.G of this permit. The Notice of
Termination shall include the following information:

1. The mailing address of the construction site for which the notification is submitted. Where a mailing
address for the site is not available, the location of the approximate center of the site must be described in
terms of the latitude and longitude to the nearest 15 seconds, or the section, township and range to the
nearest quarter;

2. The name, address and telephone number of the operator addressed by the Notice of Termination;

3. The NPDES permit number for the storm water discharge identified by the Notice of Termination;

4. An indication of whether the storm water discharges associated with industrial activity have been eliminated
or the operator of the discharges has changed; and

5. The following certification signed in accordance with Part VI.G (signatory requirements) of this permit:

"I certify under penalty of law that all storm water discharges associated with industrial activity
from the identified facility that are authorized by an NPDES general permit have been eliminated
or that I am no longer the operator of the construction activity. I understand that by submitted this
notice of termination, that I am no longer authorized to discharge storm water associated with
industrial activity under this general permit, and that discharging activity to waters of South
Carolina is unlawful under the S.C. Pollution Control Act and the Federal Clean Water Act where
the discharge is not authorized by an NPDES permit. I also understand that the submittal of this
notice of termination does not release an operator from liability for any violations of this permit or
the Clean Water Act."

For the purposes of this certification, elimination of storm water discharges associated with industrial
activity means that all disturbed soils at the identified facility have been finally stabilized and temporary
erosion and sediment control measures have been removed or will be removed at an appropriate time, or
that all storm water discharges associated with construction activities from the identified site that are
authorized by a NPDES general permit have otherwise been eliminated.

B. Addresses. All Notices of Termination are to be sent, using the form provided by the Department (or a
photocopy thereof), to the following address::

S.C. Dept. Of Health and Environmental Control
NPDES/ND Permit Administration
Storm Water Notice of Termination
2600 Bull Street
Columbia, S.C. 29201

Part X. DEFINITIONS

"Best Management Practices" ("BMPs") means schedules of activities, prohibitions of practices,
maintenance procedures, and other management practices to prevent or reduce the pollution of waters of
South Carolina. BMPs also include treatment requirements, operating procedures, and practices to control
plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage.

"CEI" means the Code of Federal Regulations.

"Commencement of Construction" - The initial disturbance of soils associated with clearing, grading, or
excavating activities or other construction activities.

"CWA" means Clean Water Act (formerly referred to as the Federal Water Pollution Control Act or
Federal Water Pollution Control Act Amendments of 1972) Pub.L. 92-500, as amended Pub. L. 95-217,
Pub. L. 95-576, Pub. L. (6-483 and Pub. L. 97-117, 33 U.S.C. 1251 et.seq.

"Dedicated nortable asphalt nlant" - A portable asphalt plant that is located on or contiguous to a
construction site and that provides asphalt only to the construction site that the plant is located on or adjacent
to. The term dedicated portable asphalt plant does not include facilities that are subject to the asphalt
emulsion effluent limitation guideline at 40 CFR 443.

"Dedicated nortable concrete nlant" - A portable concrete plant that is located on or contiguous to a
construction site and that provides concrete only to the construction site that the plant is located on or
adjacent to.

"raDrtment" means the South Carolina Department of Health and Environmental Control or an authorized
representative.

"Director" means the Regional Administrator of the United States Environmental Protection Agency or an
authorized representative.

"EPA" means the United States Environmental Protection Agency.

"Final Stabilization" means that all soil disturbing activities at the site have been completed, and that a
uniform perennial vegetative cover with a density of 70% the cover for the area has been established or
equivalent stabilization measures (such as the use of mulches or geotextiles) have been employed.

"Flow-weighted comoosite samnle" means a composite sample consisting of a mixture of aliquots collected
at a constant time interval, where the volume of each aliquot is proportional to the flow rate of the
discharge.

"Large and Medium municinal senarate storm sewer system" means all municipal separate storm sewers that
are either:
(i) located in an incorporated place (city) with a population of 100,000 or more as determined by the latest
Decennial Census by the Bureau of Census (these cities presently are Columbia and Greenville; or

(ii) located in the counties with unincorporated urbanized populations of 100,000 or more, except municipal
separate storm sewers that are located in the incorporated places, townships or towns within such counties
(these counties presently are Greenville and Richland; or
(iii) owned or operated by- a municipality other than those described in paragraph (i) or (ii) and that are
designated by the Department as part of the large or medium municipal separate storm sewer system (certain
drainage areas of the City of Charleston have been designated).

" I means notice of intent to be covered by this permit (see Part I of this permit.)

II"NOT" means notice of termination (see Part VIII of this permit).

"Point Source means any discernible, confined, and discrete conveyance, including but not limited to, any
pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal
feeding operation, landfill leachate collection system, vessel or other floating craft from which pollutants are
or may be discharges. This term does not include return flows from irrigated agriculture or agricultural
storm water runoff.

'"Runoff coefficient" means the fraction of total rainfall that will appear at the conveyance as runoff.

"Storm Water" means storm water runoff, snow melt runoff, and surface runoff'and drainage.

"Storm Water Associated with Industrial Activitv" means the discharge from any conveyance which is used
for collecting and conveying storm water and which is directly related to manufacturing, processing or raw
materials storage areas at an industrial plant. The term does not include discharges from facilities or
activities excluded from the NPDES program. For the categories of industries identified in subparagraphs
(i) through (x) of this subsection, the term includes, but is not limited to, storm water discharges from
industrial plant yards; immediate access roads and rail lines used or traveled by carriers of raw materials,
manufactured products, waste material, or by-products used or created by the facility; material handling
sites; refuse sites; sites used for the application or disposal of process waste waters (as defined at 40 CFR
401); sites used for the storage and maintenance of material handling equipment; sites used for residual
treatment, storage, or disposal; shipping and receiving areas; manufacturing buildings; storage areas
(including tank farms) for raw materials, and intermediate and finished products; and areas where industrial
activity has taken place in the past and significant materials remain and are exposed to storm water. For the
categories of industries identified in subparagraph (xi), the term includes only storm water discharges from
all areas listed in the previous sentence (except access roads) where material handling equipment or
activities, raw materials, intermediate products, final products, waste materials, by-products, or industrial
machinery are exnosed to storm water. For the purposes of this paragraph, material handling activities
include the: storage, loading and unloading, transportat, or conveyance of any raw material, intermediate
product, finished product, by-product or waste product. The term excludes areas located on plant lands
separate from the plant's industrial activities, such as office buildings and accompanying parking lots as long
as the drainage from the excluded areas is not mixed with storm water drained from the above described
areas. Industrial facilities (including industrial facilities that are Federally or municipally owned or operated
that meet the description of the facilities listed in this paragraph (i)-(xi)) include those facilities designated
under 122.26(a)(1)(v). The following categories of facilities are considered to be engaging in "industrial
activity" for purposes of this subsection:
(i) Facilities subject to storm water effluent limitations guidelines, new source performance standards, or
toxic pollutant effluent standards under 40 CFR Subchapter N (except facilities with toxic pollutant effluent
standards which are exempted under category (xi) of this definition);
(ii) Facilities classified as Standard Industrial Classifications 24 (except 2434), 26 (except 265 and 267), 28,
29, 311, 32, 33, 3441, 373;
(iii) Facilities classified as Standard Industrial Classifications 10 through 14 (mineral industry) including
active or inactive mining operations (except for areas of coal mining operations meeting the definition of a
reclamation area under 40 CFR 434.11(1)) because the performance bond issued to the facility by the
appropriate SMCRA authority has been released, or except for areas of non-coal mining operations which
have been released from applicable State or Federal reclamation requirements after December 17, 1990 and

D 0 f / L C \-: . ::8

oil and gas exploration, production, processing, or treatment operations, or transmission facilities that
discharge storm water contaminated by contact with or that has come into contact with, any overburden, raw
material, intermediate products, finished products, byproducts or waste products located on the site of such
operations; inactive mining operations are mining sites that are not being actively mined, but which have an
identifiable owner/operator;
(iv) Hazardous waste treatment, storage, or disposal facilities, including those that are operating under
interim status or a permit under Subtitle C of RCRA;
(v) Landfills, land application sites, and open dumps that have received any industrial wastes (waste that is
received from any of the facilities described under this subsection) including those that are subject to
regulation under Subtitle D of RCRA;
(vi) Facilities involved in the recycling of materials, including metal scrapyards, battery reclaimers, salvage
yards, and automobile junkyards, including but limited to those classified as Standard Industrial
Classification 5015 and 5093;
(vii) Steam electric power generating facilities, including coal handling sites;.
(viii) Transportation facilities classified as Standard Industrial Classifications 40, 41, 42, 44, and 45 which
have vehicle maintenance shops, equipment cleaning operations, or airport deicing operations. Only those
portions of the facility that are either involved in vehicle maintenance (including vehicle rehabilitation,
mechanical repairs, painting, fueling, and lubrication), equipment cleaning. operations, airport deicing
operations, or which are otherwise identified under paragraphs (i)-(vii) or (ix)-(xi) of this subsection are
associated with industrial activity;
(ix) Treatment works treating domestic sewage or any other sewage sludge or wastewater treatment device
or system, used in the storage treatment, recycling, and reclamation of municipal or domestic sewage,
including land dedicated to the disposal of sewage sludge that are located within the confines of the facility,
with a design flow of 1.0 mgd or more, or required to have an approved pretreatment program under 40
CFR 403. Not included are farm lands, domestic gardens or lands used for sludge management where
sludge is beneficially reused and which are not physically located in the confines of the facility, or areas that
are in compliance with 40 CFR 503;
(x) Construction activity including clearing, grading and excavation activities except: operations that result in
the disturbance of less than five acres of total land area which are not part of a larger common plan of
development or sale2;

(xi) Facilities under Standard Industrial Classifications 20, 21, 22, 23, 2434, 25, 265, 267, 27, 283, 31
(except 311), 34 (except 3441), 35, 36, 37 (except 373), 38, 39, 4221-25, (and which are not otherwise
included within categories :(i)-(x)).

'Waters of South Carolina" means all waters of the United States within the political boundaries of the State
of south Carolina.

"Waters of the United States" means:
(a) All waters which are currently used, were used in the past, or may be susceptible to use in interstate or
foreign commerce, including all waters which are subject to the ebb and flow of the tide;
(b) All interstate waters, including interstate "wetlands";
(c) All other waters such as interstate lakes, rivers, streams (including intermittent streams), mudflats,
sandflats, wetlands, sloughs, wet meadows, playa lakes, or natural ponds the use, degradation, or
destruction of which would affect or could affectlinterstate or foreign commerce including any such waters:
(1) Which are or could be used by interstate or foreign travelers for recreational or other purposes;
(2) From which fish or shellfish are or could be taken and sold in interstate or foreign commerce; or
(3) Which are used or could be used for industrial purposes by industries in interstate commerce;
(d) All impoundments of waters otherwise defined as waters of the United States under this definition;
(e) Tributaries of waters identified in paragraphs (a) through (d).of this definition;

On June 4, 1992, the United States Court of Appeals for the Ninth Circuit remanded the exemption for
construction sites of less than five acres to the EPA for further rulemaking. (Nos. 90-70671 and 91-70200). Upon
final resolution of this issue this definition will be, administratively modified without public notice to comply with the
final EPA definition.

(f) The territorial sea; and
(g) Wetlands adjacent to waters (other than waters that are themselves wetlands) identified in paragraphs (a)
through (f) of this definition.
Waste treatment systems, including treatment ponds or lagoons designed to meet the requirements of CWA
are not waters of the United States. This exclusion applies only to manmade bodies of water which neither
were originally created in waters of the United States (such as disposal areas in wetlands) nor resulted from
the impoundment of waters of the United States.

"10-vear. 24-hour nrecinitation event" means the maximum 24-hour precipitation event with a probable
reoccurrence interval of once in 10 years.

South Carolina

DHEC
Department of Health and Environmental Control STORMWATER MANAGEMENT
STANDARD REPORTING FORM FOR CONSTRUCTION SITES
DISTURBING 2 ACRES OR LESS
(See Reverse for Instructions)

DATE

1. FACILITY NAME OR PROJECT NAME
COUNTY CITY/TOWN
LOCATION (also:shown on location map)
TAX MAP #

2. PROPERTY OWNER OF RECORD
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

3. ENGINEER OR CONTACT PERSON
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

4. CONTRACTOR OR OPERATOR (if known)
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

5. SITE OR DAY-TO-DAY CONTACT
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

6. SIZE, TOTAL (acres) SURFACE AREA OF LAND DISTURBANCE

7. NEAREST RECEIVING WATERBODY
DISTANCE TO NEAREST RECEIVING WATERBODY
ARE THERE ANY FRESHWATER WETLANDS LOCATED ON THE PROPERTY?

IF YES, HAVE THE WETLANDS BEEN DELINEATED?

8. START DATE COMPLETION DATE

9. DESCRIPTION OF CONTROL PLAN TO BE USED DURING CONSTRUCTION. (MAY BE SHOWN ON PLAN SHEETS)

10. I HEREBY CERTIFY THAT ALL LAND DISTURBING CONSTRUCTION AND ASSOCIATED ACTIVITY PERTAINING TO THIS
SITE SHALL BE ACCOMPLISHED PURSUANT TO AND IN KEEPING WITH THE TERMS AND CONDITIONS OF THE
APPROVED PLANS. I ALSO CERTIFY THAT A RESPONSIBLE PERSON WILL BE ASSIGNED TO THE PROJECT FOR DAY-TO
DAY CONTROL.

OWNER/PERSON FINANCIALLY RESPONSIBLE

11. I HEREBY GRANT AUTHORIZATION TO THE DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL AND/OR THE
LOCAL IMPLEMENTING AGENCY THE RIGHT OF ACCESS TO THE SITE AT ALL TIMES FOR THE PURPOSE OF ON SITE
INSPECTIONS DURING THE COURSE OF CONSTRUCTION AND TO PERFORM MAINTENANCE INSPECTIONS FOLLOWING
THE COMPLETION OF THE LAND DISTURBING ACTIVITY.

OWNER/PERSON FINANCIALLY RESPONSIBLE
DHEC 3307 (9/94)

INSTRUCTIONS
STANDARD REPORTING FORM FOR CONSTRUCTION SITES DISTURBING 2 ACRES OR LESS

Who Must File A Standard Reporting Form For Disturbing 2 Acres or Less City of Greenville:
City of Greenville
Any public (federal, state, local or school), private, industrial, commercial and/or Engineering & Public Works Department
residential subdivision project that will be engaging in any land disturbing Post Office Box 2207
activity that disturbs an area two (2) acres or less. Greenville, SC 29602
(803) 467-4400
When is a Land Disturbance Permit Required on Projects of 2 Acres or Less
of Actual Disturbance Spartanburg County:
Spartanburg County Public Works Department
If the land disturbance project is located within one-half (/2) mile ofa receiving Post Office Box 1633
waterbody in the S. C. Coastal Zone (Beaufort, Berkeley, Charleston, Colleton, Spartanburg, SC 29304
Dorchester, Georgetown, Horry and Jasper Counties) then a permit is required and (803) 596-3582
this reporting from CAN NOT be used. Particular emphasis shall be placed on the
following projects in this category: City of Spartanburg:
City of Spartanburg
(a) All commercial buildings which will handle hazardous chemicals (including Public Works Department
gasoline, kerosene, diesel fuel, nutrients, etc.) Post Office Drawer 1749
Spartanburg, SC 29304-1749
(b) All commercial buildings and parking/runway areas with greater than one (1) (803) 596-2107
acre of impervious surface (building and parking).
York County:
(c) All commercial buildings and parking/runway areas with greater than one- York County Planning
half (1/2) acre of impervious surface located directly adjacent to a salt water and Development Services
(critical) area. 1070 Hackle Boulevard, Box A-5
Rock Hill, SC 29732
(d) All residential subdivision developments located directly adjacent to a salt (803) 922-7271
water (critical) area.
AUl other counties:
(e) All projects impacting Geographical Areas of Particular Concern (GAPC) S.C.D.H.E.C.
Stormwater Management
The design of these projects (a-e) must meet the requirements of R. 72-3071 of the 2600 Bull Street
S. C. Stormwater management and Sediment Reduction regulations and must Columbia, SC 29201
have the plans and specifications prepared by a registered engineer, landscape (803):734-5300
architect or Tier B Land surveyor. Other activities within one-half(112) mile of a
receiving waterbody in the Coastal Zone require a permit but must only meet the
submittal requirements of R72-307H'which do not require preparation by a Completing The Application
licensed professional.
You must type or print, in the appropriate areas only. Direct any questions you
Where To File' may have to (803) 734-5300 or the appropriate implementing agency.

Georgetown and Horry Counties: . Enter the name of the project or facility where the land disturbing
S.C.D.H.E.C. - O.C.R.M. activity will be taking place. List the county and name of city/town if
1601 North Oak Street, Suite 203 applicable. Enter the location of the activity and the tax map number.
Myrtle Beach, SC 29577
(803) 626-7217 2-5. Enter the name, and complete address and phone numbers as needed.

Beaufort and Jasper Counties: 6. Enter the total area of the project in acres. Enter the total area that will be
S.C.D.H.E.C. - O.C.R.M. disturbed, in acres.
Post Office Box 587
Beaufort, SC 29901 7. Enterthenameofthe waterbodies. Enter yes or no asneeded.
(803) 524-6885
8. List the anticipated start and completion dates for this project.
Berkeley, Charleston, Colleton, and Dorchester Counties:
S.C.D.H.E.C. - O.C.RM. 9. Describe control plan to be used during construction.
4130 Faber Place, Suite 300
Charleston, SC 29405 For questions 10 & 11, please read the certification. Have appropriate person(s)
(803) 744-5838 sign and date the certification.

Greenville County: What Happens After I File
Greenville County Soil &
Water Conservation District If a permit is not required then the reporting form and pertinent submittal
301 University Ridge, Suite 4500 information is sent to the appropriate office of DHEC and the applicant may
Greenville, SC 29601 proceed with construction activity provided the practices indicated in the
(803) 467-2766 submittal are incorporated. A letter or permit in response to this reporting form is
ot required from DHEC. However, DHEC personnel can conduct site
inspections to insure compliance with the submitted plans.

S. C. DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
STORMWATER MANAGEMENT SUBMITTAL CHECK LIST

SITES DISTURBING TWO (2) ACRES OR LESS

The applicant must include the following items in the submittal package:

_ 1. An anticipated starting and completion date of the various stages of land disturbing activities and the
expected date the final stabilization will be completed.

_ 2. A narrative description of the stormwater management and sediment control plan to be used during land
disturbing activities.

_ 3. General description of topographic and soil conditions of the tract.

_ 4. A general description of adjacent property and a description of existing structures, buildings, and other fixed
improvements located on surrounding properties.

_ 5. A sketched plan (engineer's, Tier B surveyor's or landscape architect's seal not required) to accompany the
narrative which shall contain:

_ (a) A site location drawing of the proposed project, indicating the location of the proposed project in relation
to the nearest receiving waterbodies, roadways, and jurisdictional boundaries;

- (b) The boundary lines of the site on which the work is to be performed;

_ (c) A topographic map of the site if required by DHEC staff;

_ (d) The location and details of temporary and permanent vegetative and structural stormwater management and
sediment control measures.

_ 6. Stormwater management and sediment control plans shall contain certification by the person responsible for
the land disturbing activity that the land disturbing activity will be accomplished pursuant to the plan.

_ 7. All stormwater management and sediment control plans shall contain certification by the person responsible
for the land disturbing activity of the right of DHEC or implementing agency to conduct on-site inspections.

(The requirements contained above may be indicated on one plan sheet.)

South Carolina

DHEC
partmenit do Hienlm and Environmental Control
STORMWATER MANAGEMENT
STANDARD APPLICATION FORM FOR CONSTRUCTION SITES
DISTURBING MORE THAN 2 ACRES
(See Reverse for Instructions)

Submission of this application constitutes notice that the party identified in Section 2 of this form intends to be authorized by a NPDES permit issued for storm
water discharges associated with construction activity in the State of South Carolina. Becoming a permittee obligates such discharges to comply with the terms
and conditions of the permit. ALL NECESSARY INFORMATION MUST BE PROVIDED ON THIS FORM.

Section 1:
Date

i. FACILITY NAME OR PROJECT NAME
COUNTY CITY OR TOWN
LOCATION (also shown on location map)
LATITUDE LONGITUDE
TAX MAP # USGS QUAD NAME

2. NEAREST RECEIVING WATERBODY
DISTANCE TO NEAREST RECEIVING WATERBODY
ULTIMATE RECEIVING WATERBODY

Section 2

3. PROPERTY OWNER OF RECORD
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

4. PERSON FINANCIALLY RESPONSIBLE FOR THE LAND DISTURBING ACTIVITY
(if different from above)
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

5. AGENT OR CONTACT PERSON (if applicable)
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

6. ENGINEER, TECHNICAL REPRESENTATIVE OR FIRM
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

7. CONTRACTOR OR OPERATOR (if known)
ADDRESS
PHONE (DAY) (NIGHT) (MOBILE)

Section 3

8. SIZE, TOTAL (acres) SURFACE AREA OF LAND DISTURBANCE (acres)

9. SIC CODE (SIC code only required if site disturbs S acres or more)

IS THE SITE LOCATED ON INDIAN LANDS? (if site disturbs 5 acres or more)

10. TYPE OF PROJECT & FEES (please circle the type of activity)
a. Federal . State -Local - School (EXEMPT FROM FEES)
b. Industrial - Commercial - Residential (S50per disturbed acre, max. S1,000 per project)

TOTAL FEE S

DHEC 3306 (9/94)

INSTRUCTIONS
STANDARD APPLICATION FORM FOR CONSTRUCTION SITES DISTURBING MORE THAN 2 ACRES

Who Must File A Standard Application Form For Sites Greater Than Two (2) Section I Location Information
Acres
I. Enter the name of the project or facility where the land disturbing activity will be
Any Public (federal, state, local or school) or private industrial, commercial, and/or, taking place. Enter the location of the activity. A USGS map with the site location
residential project that will be engaging in any land disturbing activity that disturbs identified must be included.
an area of two (2) or more acres.
2. Enter the names of the waterbodies as needed.
Where To Fdle
Section 2 Personal Information
Georgetown and Horry Counties:
Enter the name, complete address and phone numbers as needed.
S.C.D.HE.C.-O.C.R.M
1601 North Oak Street, Suite 203, Myrtle Offices Section 3 General Information
Myrtle Beach, SC 29577
(803) 626-7217 8. Enter the total area of the project area in acres. Enter the total surface area, in
acres, of the land that will be disturbed. If two (2) acres or less, please refer to
Beaufort and Jasper Counties: Standard Reporting Form For Construction Sites Disturbing 2 Acres or Less.

S.C.D.H.E.C.-O.C.R.M. 9. List the Standard Industrial Classification (SIC) code as needed. Enter yes or no,
P. O. Box 587 as appropriate if the site is located on Indian lands. (Only needed if site is 5 acres or
Beaufort, SC 29901 greater).
(803) 524-6885
NOTE: SIC CODES ONLY REOUIRED IF SITE
Berkeley, Charleston Colleton, and Dorchestor Counties: DISTuRBS FIVE I5s OR MORE ACRES

S.CD.H.E.C.-O.C.R.M. SIC CODES:
4130 Faber Place, Suite 300
Charleston, SC 29405 15 GENERAL BUILDING CONTRACTORS
(803) 744-5838
1521 Single-family housing construction
Greenville County: 1522 Residential construction, nec.
1531 Operativebuilders
Greenville County Soil and Water Conservation District 1541 Industrial buildings and warehouses
301 University Ridge, Suite 4500 1542 Nonresidential construction, nec.
Greenville SC 29601
(803)467-2756 16 HEAVY CONSTRUCTION

Spartanburg County: 1611 Highway and Street Construction
1622 Bridge, tunnel, and elevated highway
Spartanburg County Public Works Department 1623 Water, sewer, and utility lines
P.O. Box 1633 1629 Heavy construction, nec.
Spartanburg, SC 29304
(803) 596-3582 17 SPECIAL TRADE CONTRACTORS

City of Spartanburg: 1794 Evacuation work
1795 Wrecking and demolition work
City of Spartanburg Public Works Department
P.O. Drawer 1749 10. Circle the appropriate type of project. If your project is listed in the "a"
Spartanburg, SC 29304-1749 category enter "EXEMPT" for the total fee. If your project is listed in the "b"
category then enter the total fee.
York County:
11. Enter the actual start and completion dates or a best estimate.
York County Planning and Development Services
1070 Heckle Blvd. Box A-5 12. Enter yes or no, as appropriate. If yes, delineation must be included on the plan.
Rock Hill, SC 29732
(803) 922-7271 Section 4 Certification -

All Other Counties: For questions 13 through 15 please read the certification. Have appropriate
person(s) sign and date the certification.
Department of Health & Environmental Control
Stormnwater Management Section 5 For Internal Ue Only
2600 Bull Street
Columbia, SC 29201 Section 6 Reminder
(803) 734-5300
Distribute a Copy of the plans after approval to the 3 parties listed.
Completing The Application

You must type or print, in the appropriate areas only. Direct any questions you may
have to (803) 734-5300 or appropriate agency.

11. START DATE COMPLETION DATE

12. ARE THERE ANY FRESHWATER WETLANDS LOCATED ON THE PROPERTY?
IF YES, HAVE THE WETLANDS BEEN DELINEATED?

Section 4

CERTIFICATION

13. I HEREBY CERTIFY THAT ALL LAND DISTURBING CONSTRUCTION AND ASSOCIATED ACTIVITY PERTAINING TO
THIS SITE SHALL BE ACCOMPLISHED PURSUANT TO AND IN KEEPING WITH THE TERMS AND CONDITIONS OF THE
APPROVED PLANS. I ALSO CERTIFY THAT A RESPONSIBLE PERSON WILL BE ASSIGNED TO THE PROJECT FOR
DAY-TO-DAY CONTROL. I CERTIFY UNDER PENALTY OF LAW THAT TIES DOCUMENT AND ALL ATTACHMENTS
WERE PREPARED UNDER MY DIRECTION OR SUPERVISION IN ACCORDANCE WITH A SYSTEM DESIGNED TO
ASSURE THAT QUALIFIED PERSONNEL PROPERLY GATHERED AND EVALUATED THE INFORMATION SUBMIITED.
BASED ON MY INQUIRY OF THE PERSON OR PERSONS WHO MANAGE THE SYSTEM, OR THOSE PERSONS DIRECTLY
RESPONSIBLE FOR GATHERING THE INFORMATION, THE INFORMATION SUBMITTED IS, TO THE BEST OF MY
KNOWLEDGE AND BELIEF, TRUE, ACCURATE, AND COMPLETE. I AM AWARE THAT THERE ARE SIGNIFICANT
PENALTIES FOR SUBMITTING FALSE INFORMATION, INCLUDING THE POSSIBILITY OF FINE AND IMPRISONMENT
FOR KNOWING VIOLATIONS.

OWNER/PERSON FINANCIALLY RESPONSIBLE

14. I HEREBY GRANT AUTHORIZATION TO THE DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL AND/OR
THE LOCAL IMPLEMENTING AGENCY THE RIGHT OF ACCESS TO THE SITE AT ALL TIMES FOR THE PURPOSE OF ON
SITE INSPECTIONS DURING THE COURSE OF CONSTRUCTION AND TO PERFORM MAINTENANCE INSPECTIONS
FOLLOWING THE COMPLETION OF THE LAND DISTURBING ACTIVITY.

OWNER/PERSON FINANCIALLY RESPONSIBLE

15. DESIGNER CERTIFICATION - FIVE COPIES OF THE PLANS, ALL SPECIFICATIONS AND SUPPORTING CALCULATION,
FORMS, AND REPORTS ARE HEREWITH SUBMITTED AND MADE A PART OF THIS APPLICATION. I HAVE PLACED
MY SIGNATURE AND SEAL ON THE DESIGN DOCUMENTS SUBMITTED SIGNIFYING THAT I ACCEPT
RESPONSIBILITY FOR THE DESIGN OF THE SYSTEM. FURTHER I CERTIFY TO THE BEST OF MY KNOWLEDGE AND
BELIEF THAT THE DESIGN IS CONSISTENT WITH THE REQUIREMENTS OF TITLE 48, CHAPTER 14 OF THE CODE OF
LAWS OF SC, 1976 AS AMENDED, AND PURSUANT REGULATION 72-300.

SIGNATURE S.C. REGISTRATION NUMBER

ENGINEER
TIER B. LAND SURVEYOR
LANDSCAPE ARCHITECT

Section 5

FOR OFFICIAL USE ONLY FILE #

1 I HEREBY CERTIFY THAT I HAVE THOROUGHLY REVIEWED THE APPLICATION, PLANS AND
SUPPORTING DOCUMENTS AND FOUND THEM TO BE IN COMPLIANCE WITH THE LETTER AND THE
INTENT OF THE LAW. THIS STAMP OF APPROVAL ON THE PLANS IS SOLELY AN
ACKNOWLEDGEMENT OF SATISFACTORY COMPLIANCE WITH THE REQUIREMENTS OF THESE
REGULATIONS. THE APPROVAL STAMP DOES NOT CONSTITUTE A REPRESENTATION OR
WARRANTY TO THE APPLICANT OR ANY OTHER PERSON CONCERNING THE SAFETY,
APPROPRIATENESS OF EFFECTIVENESS OF ANY PROVISIONS, OR OMISSION FROM THE STORMWATER
AND SEDIMENT PLAN. I HAVE STAMPED FIVE SETS OF PLANS APPROVED. I HAVE FILED ONE SET
AND DISTRIBUTED ONE SET TO THE INSPECTION AUTHORITY.

PLAN REVIEWER

2. WILL AS BUILT CERTIFICATION BY A REGISTERED PROFESSIONAL RESPONSIBLE FOR
CONSTRUCTION BE REQUIRED FOR THIS PROJECT FOR FINAL APPROVAL?
(To be specified by reviewer)

YES NO

IFYES

PRIOR TO FINAL APPROVAL, I WILL SUBMIT A; STATEMENT CERTIFYING THAT CONSTRUCTION IS
COMPLETE AND IN ACCORDANCE WITH APPROVED PLANS AND SPECIFICATIONS. THIS WILL
BE BASED UPON PERIODIC OBSERVATIONS OF CONSTRUCTION AND A FINAL INSPECTION FOR
DESIGN COMPLIANCE BY ME OR A REPRESENTATIVE OF MY OFFICE WHO IS UNDER MY
SUPERVISION. (To be signed by a registered professional responsible for construction)

SIGNATURE S.C REGISTRATION NUMBER

ENGINEER
TIER B, LAND SURVEYOR
LANDSCAPE ARCHITECT

Section 6

FOR APPLICANT USE

PLEASE DISTRIBUTE 3 COPIES OF THE APPROVED PLANS AS SHOWN. PLEASE HAVE A COPY OF THE
PLANS WITH THE APPROVAL STAMP ON THE SITE AT ALL TIMES.

1. OWNER/PERSON FINANCIALLY RESPONSIBLE
2. DESIGN PROFESSIONAL
3. CONTRACTOR
" ~ ~

S. C. DEPARTMENT OF HEALTH & ENVIRONMENTAL CONTROL
STORMWATER PERMIT CHECK LIST

SITES DISTURBING MORE THAN TWO :(2) ACRES

The applicant must include the following items as part of the submittal package for a stormwater management permit:

_ 1. Site plans (24 X 36 preferred).

_ 2. Copyof a 1:24,000 scale USGS topographic map with project outlined and the route of runoff offsite to the nearest
receiving waterbody.

_3. Permit fee of $50/disturbed acre up to a maximum of $1000.

_4. Completed application form.

_ 5. Project narrative (include brief overall description of project and pre- and post- development site conditions).

_ 6. Project calculations to include proposed flows versus requirements, peak rate(s) of runoff/discharge, and inflow/outflow
hydrographs at point(s) of discharge. A summwy sheet with the amount of impervious area (acres), pre- and post-
development runoff rates (cfs), and the amount of storage required (acre-ft) must be included.

_ 7. Existing and proposed contours on a current plat.

_ 8. Wetland delineation (if applicable).

9. Sequence of construction operations.

_10. Identification of all phasing.

_11. Locations of stormwater and sediment control features.

_12. Details of stormwater and sediment control features (to include cross sections of ponds and swales, silt fence or hay bale
detail, construction entrance detail, etc.).

_13. A general description of the predominant soil types on the site.

_14. A description of the maintenance program for stormwater management and/or sediment control facilities.

15. Sediment control notes to be included on the plans (as follows):

All sediment control measures shall be inspected at least once every seven calendar days and after any storm event of greater
than 0.5 inches of precipitation during any 24-hour period. All sediment control features shall be maintained until final
stabilization has been obtained.

Stabilization measures shall be initiated as soon as practicable in portions of the site where construction activities have
temporarily or permanently ceased, but in no case more than 14 days after the construction activity in that portion of the site has
temporarily or permanently ceased, unless activity in that portion of the site will resume within 21 days.

Residential subdivisions require erosion control features for infrastructure as well as for individual lot construction. Individual
property owners shall follow these plans during lot construction or provide an individual plan meeting Section R.72-307 of the
Stormwater Management and Sediment Reduction Act requirements.

;orm Aoorovea. ome no. 2awww0
See Roer"le for InstruJctions Aconm,.Srvui~s:.31.15

United States Envronmenta Protection Agency
NPOES 1. UU5~~~~~~~~~~~~ wasnington. DC 20460
FORM jU Notice of Intent (NOI) for Storm Water Discharges Associated with Industrial
Activit Under the NPDES General Permit

ISmisssion of this Notice of Intent constiumes notice that the Party Identified in Section I of this form intends to be authorized by a NPDES permit issued tar sorm'
water aischiarges associatea with industrial acuviy in the State identified in Section 11 of this form. Becoming a permame obligates such discharger to comply wit
the terms and conditions of the permit. ALL. NECESSARY INFORMATION MUST BE PROVIDED ON THI FORM.

I. Factlity Operator Information

Nae Phone:

Stau of f
Address: . t aII

City: s t a aiaa aag MP aaigIIIIISae....... ZPCode: I i ia

II. Facility/Sitle Location Information

Is fth Facility Ios an
N'armue I n di an Landsaa' or N idaiL.id?"'')

Address I

City : , Ia a Stle: L... Zip Code-

Latitude L..L..L..L..L LJ Lngitude Q ualifir L: JSeto Townshimp:L...1 Range: II

Ill. Site Activit Infbrination

MS.4 Operator Namui: a aa a * a aI I IIII II

Recemng Water Body:I

If You are Filing as a C-eite.Are There Existin Is the Faclitv Required to Submit
EnterStormWaterdGeneral PeriWt Nubw uanutauve Usaa? (Yor N) Monutonng Data? (11.2. or 3) L

SIC or Deslonated
aAcumit Code: Z-ay n: _____ .rd:_____

If This, Fadlity is a Member of a Group
AaPlcation, Enter Grouoi Application Numbter-

It You Hame Other Existing NPOES
Permils.Enter Permit Numoers: I I . a , , I

IV. AdditftioaInformation Renuirstd for Construction Activities Only
Profect CG"OMpen
Start Date: Dale: ~~~~~~~~~~~~~~~Is the Stor Water Pollution Prevention Plan
Estimated Armtbea in C~omrpliance with State andibor Local
Jj-~~~~ ~~ II D~c
~~ Distuz~~~~ed fm . ~~Sedimen and Emos=o Plans? (Y or N)

V. Certification: I certify under penalty of law that this documenit and all atcments were brecared undeor my directioin or suPervision in aacrdance with a
system designed to assure mma "uified Personnel crocerly gather and evaluate the information suomnitted. Based on my inquiry of the person of Persons wno
manaoe tme system. or those Persons directiv resoonsibie, tar garnering the informatio0n, Ith intormation subrnrlted is. to Toe PMs OfMy knowledge and belief, true.
accrate. ano comp~lee. iam aware Imat there are significant penames for suomitting talse iniormation. inciuaing tine possioility at fine and impnisonment !or
knowing violations.
Print Name:.Dae

Signature:
EPA Form 3510-6 (8-92) PrneJo OyEe ae

Instructlons - EPA Form 35106
Notice Of Intent rNOI) For Storm Water Dlshsargs Associated With Industrial Actvity
To Be Covered Under The NPOES General Permit

Who Mut File A Notice Of Intt (NOI) Form Those tacilities that must sunmrt montonng cata (e.g., cence 2) are. Section 313
EPCRA acalities: pnmary meta industnries: land dlspossa unnslincterators/BlFs: wooo
Federas law at 40 CFR Part 122 prohibits point source discharges of storm water treatment tacalnmes taclites wint coal Pile runoff: and. battery reclalmers.
associated with ndusmal actvty to a water boody(esI of the U.S. without a National
Pollutant Discharge Eliminaton Systemn NPDES) permit. The operator ol an industna List. in descending oreer of signlifcance. up to lour 4-dign standar Industnal
acvrtvy that has such a storm water discnarge must submit a NOI tO ootan coverage classilcation iSIC) codes that best descntbe the pnncioa products or services Provided
uriner the NPDES Storm Water General Permit. It you have questions about whether at the acility or site identified in Secton II of this applcation.
you need a permit under me NPOES Storm Water program. or d you neeo informaton
as to whether a artancular program is administered by EPA or a state agency, contact For ndustnal activites adefined in 40 CFR 122.26(b(14)(i).(x) that o not have SIC
the Storm Water Hotline at (703) 821-4823. codes that accurately descnbe the pnnacii products produced or services provided, the
Ioiowfng 2-chaatcter codes are to be used:
Where To File fO4 Form
HZ * Hazarlous waste treamernt. storage. or disposal facilities, including those that
NOIS must be am to the folloig address: are operatng under intrm status or a permn under subttle C of RCRA (40
CFR 122.26 b)�(14)(iv)J;
Storm Water Notice of Intent LF * Landfills land appliltion nitl.s, and ort dumps that rrei"e or have receved
PO Box 1215 any indurtna wastes. including those tat are sublect to rpgulation under
Newngtn, VA 22122 subtitle D of RCRA 140 CFR 122.26 (b)(14)(v)l;
SE - Steam etc power genersing facilitis, including oal handling itass (40 CFR
Completing The Foril 122.26 (b)(14)(vii)j;
TW * Treament woMs treatng Oomestc sewage or any other sewage sludge or
You must type or rim. using upper-caselenters. in the appronpate areas only. Please wastwater treatmet device or system. used in me storage, treatment.
place each character between tme marKs. Abbrevinate id necessary to stay within me recyring, and reclamation et munitmi or domestic sewage 140 CFR 122.26
number od cnaracters allowed for each nem. Use one space tor breas between words. ibH)141ix)]: or.
bit not for punctuation marks unless hey are neoede to clanty your response. It you CO - Constructio actvtes 140 CFR 122.26 (Mb14)(x):
have any questons on this form, call the Storm Water Rolinme at i703) 821-4823.
I the facility listed in Secton II has aricipaed in Part I of an aporoved storm water
Section I Fcility Opertnor Informarion :rouo aoDlication ano a group number has been assqinea. enter nme group applcauon
number in the space proviced.
Give me legal name f the person. firm. public organizatpon. or any other entit that
operates tme tacilty or sse descnbed in this appication. The name of me oDerator may th ere are other NPDES ermits presently issued for the acilty or site liste in Section
or may not be the same as me name of the lacitr. The resonsible arty is the legal II. list the permin numbers. If an application for melacilv has been suDmImane but no
enty mat conros tne lacllty's oDeration. rathe an te plant or sne manager Do not permnit numer has bDen assigned, enter the applicanon number.
use a Colloquial name. Enter the complete .cress ano telephone number o 0 the
oPertor. Set IV o IV ormraton Rqud ftor Construction Actvtl Only

Enter the appronate letter to inicata the egal status of me operator of me facility Consruction actives must complete Section IV in addition to Sections I through 111.
Only constructioon actves need to complete Section IV.
F Federa : M = Public (other than federal or statel
S - Slat P . Private Enter te Proect star date and te estimated comoletion date for the enmre
development plan.
SectIon I Feolty/ltie Loetre In foreton
Provide an estimate of te tro number of acres of the site on which soil will be
Enter the faclity's or site's or s icial or legal name wan compiete street address. including disturbed Iround to me nearest aeel.
city. state, and ZIP code. If the facility or site lacas a street address. indicate me state.
the latitude and longitude of the laciaity to the nearest 15 seconds. or the quaner. indicate whmerer me storm water pollutton prevention plan for the site is in comliance
section. townsnhip, and range ito t nearest uarter secton) of me approximate center itnm approved state anwor loca seomenm ano erosion plans, perms., or storm waler
of the sie. management plans.

noicate wnetner me facilty is located on Indian lanes. Secton V Certmfction

Section II SIe Acvty Intrtione Federal statuns provide tr severe penamltes for suDmtting talse inrormaton on mtis
apploation form. Federal reguaions require this olation to be signed as follows:'
If Mte snorm warer discharges to a municipal separate oterm C-",or osytam IMS4). enter
,he. name of the operator of me MS4 (e.g.. municDaiy name. county namet ano the For d comroration: by a resonsible corporate officer. which means: u} president.
receving water of me oischarge from the MS4. (A MS4 is :ehned as a conveyance secretary. treasurer, or vice-president of the corporation in charge of a pnncioat
or system of conveyances tinctuaing macs with ramnage systems. municipal streets. : ousness function. or any other person who Derforms similar poliy or decision making
catch bans. curbs. gutters. a es, man-made channes. or storm rramns that is functions. or ii t me manager f one or more manutactunng production. or operanng
owned or oerated by a state. city. town, borough. county. parish, disct. association. aclties emloying more than 250 persons or harving gross annual sWes or expenditures
or other ouic body which is aesignea or used for collecting or conveyrng storm water. exceeding $25 million lm seon-quanrer 1980 ollars. it authonty to sign documents
: as Peen assigned or aegateda o the manager In accoroance wln ccroorate
If te actity discharges ston watr irectly to recvng wateris). enter the name of the procedures;
recevng water.
For a patnnmenl or so prpntorsiat : by a general partner or Ihe propnetor �o
If you are filing as a co-permmee ad a storm water general permt number has been
Issued, enter that number n the space provided. For a munrpality. srate. FederAl. or oherpublic lacifify: by either a pnncipal emec' e
officer or ranking electe offica.
Indrcate wnether or no mthe owner or operator of the faclity has existing ouantitatve
=ata that represent me cnaractensics ano concentraton ot Dolluants in storm water Plap eork Reduction Act Notlde
discharges.
Public reporting burden for mthis appltcaton is estimated to average 0 5 - -
Indicate wneer te aciliy is required to submit monitonnring data by enenng one of me aplcation. ncluding time for remewing mstructions. searching existng c.1:
Tollowing: gatenng ano maintaining the data neded. and completng nan rviewin-o -
lt inlormation Send comments regairing me burten estimate. any otne, .
1 . Not renuired to submit monitonng oara: collection o inrlrmnation. or suggestions for lmoroving this form
2 . Reourred to suomn monnonng daia. suggestions wmncn may increase or reduce this burden to: Chief. 'mc--
3 * Not required to submni monnonng oata: suomrmng certication for monitonng Brancn. PM-223. U.S. Envronmental Protection Agency. 401 M
excusion Wasninglon. DC 20460. or Director. Office o Information and Regulator. -
ot Management ano Buoget. Wasnhington. ODC 20503.

";i1 A^urOvIr~I. 0MB No. 2040,flM
Please See Instructions Before Completing This Form Approva expire: B-31-95
United Slates Environmental Protection Anency
rIPDES Washington. CC .0460
~~FORM j Notice of Termination (NOT) of Coverage Under the NPDES General Permit
IORMEPA ~~~~for Storm Water Discharges Associated with Industrial Activity

Submission of this Notice of Termination constitutes notice that the party identified in Section II of this form Is no longer authorized to discharge storm water
associated with industrial activity under the.NPDES program. ALL NECESSARY INFORMATION MUST BE PROVIDED ON THIS FORM.

I. Permit Information

NPDES Storm Water Check Here it You are No Longer Check Here if the Storm Water
General Permit Number: I the Operator of the Facility: Discharge is Being Terminated:

II. Facility Operator Information

Name: Phne
,'are I , , , , , , Phone: I i I i I i i I

Address: I

City: I I I I I I I I State: .i ZIP Code:

FciiitylISite Location Information

Name:

Addres S.

City: State: I.i.i ZIPCode:
ZIP Code: J ,

Latitude: I I L, I Longitude:! I Quaner: o . Section: Tnshi:, I Range:

IV. Certilicaltion: I certify under penally of law that all storm water discharges associated with Industrial activity from the identified facility that are authorized by a
NPDES eeneral permit have been eliminated or that I am no longer the operator of the facility or construction site. i understand that by submitting this Notice of
Termination. I am no longer authorize to discharge storm water associated with industrial activity under this generai permit. and that oischarging pollutants in
storm water associated with industrial activlty to waters of the United States is unlawful under the Clean Water Act wnere the discharge ts not authonrized by a
NPDES ermit. I also understand that the submittal of this Notice of Termination does not release an operator from tiability for any violations of this permit or the
Clean Water Act.

-'ii1[ [4�i11~. - '='=____________

Signature:

Instructions for Completing Notice of Termination (NOT) Form

Who May File a Notice of Termination (NOT) Form Where to File NOT Form

Permittees who are presently covered under the EPA issued National Pollutant Send this lorm to the the following address:
Discharge Elimination System INPDES) General Permit for Storm Water
Dicharges Associated with Industrial Activity may submit a Notice ol Termination Storm Water Notice of Termination
NOTI form wnen their lacilities no longer have any storm water discharges P.O. Box 1185
associated with industnrial activity as defined in the storm water regulations at 40 Newinoton. VA 22122
:R 122.28 IbWi t -, or wnen tnev are no lonoer the ooerator of the tacilities

For construction acivities. etimination of all storm water discharges associated Completling the Form
with industrial actiwtvity occurs when disturbed soils at the construction site have
been linally stabilized andt lemporary erosion and sediment control measures Type or print. using upper-case letters. in the appropriate areas only. Please
-ave been removed or will be removed at an appropriate time, or that all storm place each character between the marks. Abbreviate if necessary to stay within
.vater oischaroes assoclaled with mindustrial activity from tie construction site that the number of characters allowed for eacn item. Use only one space for breaks
are authorized vby a NPDES general bermit have otherwise oeen eliminated. between words. but not for Punctuatlon marks unless they are neeoed to clarify
=inal stabilization means that all soil-disturbing activities at the site have been your resPonse. If you nave any questions aOout this form. call the Storm Water
omoDleled. and that a uniform perennial vegetative cover with a density of 70% of Hotline at (703f 821-4823.
'he cover For unpaved areas and areas not covered by permanent structures has
-een established. or eouivaient permanent stabilization measures isucn as tne
.,seor riorao. oaolons. or ceorextlesi nave oeen emoloveo. PLEASE SEE REVERSE OF THIS FORM FOR FURTHER INSTRUCTIONS

=-PA Form 35t0.7 18-921 - nnte o Recvcled Paper
printe d aRt

Instructions - EPA Form 3510.7
Notice of Termination (NOT) of Coverage Under The NPDES General Permit
for Storm Water Discharges Associated With Industrial Activity

Section I Permit Informatlon Section IV Certification

Enter the existing NPDES Storm Water General Permit number assigned to the Federal statutes orovide for severe penalties for subr ig false information on
facility or site identified in Section il. If you do not know the permit number. this application torm. Federal regulations require this cation to be signed as
contact the Storm Water Hotline at (703) 821-4823. follows:

Indicate .your reason for submitting this Notice ol Termination by checking the For a corporation: by a responsible corporate officr ,hich means: (i) president.
appropriate box: secretary. treasurer. or vice-president of the corr ' on in charge of a principal
business function. or any other person who pen: :is similar policy or decision
If there has been a change of operator and you are no longer the operator making functions. or (ii) the manager of one or more manufactunng, production.
of the facility or site identified in Section III. check the corresponding box. or operating facilities employing more than 250 persons or having gross annual
sales or expenditures exceeding $25 million (in second-quarter 1980 dollars). if
it all storm water discharges at the facility or site identified in Section III have been authonty to sign documents has been assigned or delegated to the manager in
terminated. check the conesponding box. accordance with corporate procedures:

Section II Facility Operator Information For a partnership or sole propnetorship: by a general partner or the proprietor: or

Give the legal name of the person, firm, public organization. or any other entity that For a munhcpalry. State., Federal. or other public facility: by either a pnncipal
operates the facility or site described in this application. The name of the operator executive officer or ranking elected official.
may or may not be the same name as the facility. The operator of the facilitv is
ie legal entity wnich controls the tacility s operation. rather than the plant or site Paperwork Reduction Act Notice
manager. Do not use a colloquial name. Enter the complete address and
telephone number of the ooerator. Public reporting burden for 'his aoplication Is estimated to average 0.5 hours per
application, including time laor reviewing instructions. searching existing data
Section III Facility/Site Location Information sources, gathering and maintaining the data needed, and completing and
reviewing the collection of information. Send comments regarding the burden
Enter the facility's or site's official or legal name and complete address. including estimate. any other aspect ol the collection of information. or suggestions for
cty. state and ZIP code, If the facility lacks a street address, indicate the state. improving this foterm. including any suggestions which may increase or reduce this
the latitude and longitude of the facility to the nearest 15 seconds. or the quarter, burden to: Chief Information Policy Branch. PM-223. U.S. Environmental
section. township. and range (to the nearest quarter section) of the approximate Protection Agency. 401 M Street. SW. Washington. DC 20460. or Director. Office
center of the site. of Information and Regulatory Affairs. Office of Management and Budget.
Washington, DC 20503.

NPDES GENERAL PERMIT FOR STORM WATER DISCHARGES FROM
CONSTRUCTION ACTIVITIES THAT ARE CLASSIFIED AS "ASSOCIATED WITH
INDUSTRIAL ACTIVITY" BY EPA REGULATION (PERMIT NO.: SCR100000)

CO-PERMITTEE AGREEMENT

All contractors and subcontractors of :he owner/operator whose
activities at the construction site may impact storm water
discharges or controls at the construction site along the duration
of the construction project, shall sign a copy of the certification
statement given below:

"I certify by my signature below that I accept the terms and
conditions of the Storm Water Pollution Prevention Plan
(SWPPP) as required by the general National Pollutant
Discharge Elimination System (NPDES permit number SCR100000)
issued to the owner/operator of the construction activity for
which I have been contracted to perform construction related
professional services. Further, by my signature below, I
understand that I am becoming a co-permittee with the
owner/operator and other contractors that have become co-
permittees to the general NPDES permit issued to the
owner/operator of the facility for which I have been
contracted to perform professional construction services. As
a co-permittee, I understand that I, and my company, as the
case may be, are legally accountable to the SC Department of
Health and Environmental Control (DHEC), under the authorities
of the CWA and the SC Pollution Control Act, to ensure
compliance with the terms and conditions of the SWPPP. I also
understand that DHEC enforcement actions may be taken against
any specific co-permittee or combination of co-permittees if
the terms and conditions of the SWPPP are not met. Therefore,
having understood the above information, i am signing this
certification and am receiving co-permittee status to the
aforementioned -general NPDES permit." The date of the
signature, the title of the person providing the signature,
and the name, address, and telephone number of the contracted
firm, shall also be provided. In the event the SWPPP is
amended-by the owner, such amendments should be incorporated
to the plan and the contractors and subcontractors should
acknowledge by signature.

The signatory requirements of 40 fCFR 122.22, as provided in Part
VI.G of Permit No.: SCR100000 are applicable to each contracted
entity that must sign the contractor's certification statement.
Upon signing the certification, the contractor is a co-permittee
and becomes accountable to the Department to ensure the terms and
conditions of Permit No.: SCR100000 are implemented. All co-
permittees are subject to Department enforcement actions if Permit
No.: SCR100000 conditions are not met. Enforcement actions may be
taken against any specific co-permittee or combination of co-
permittees, with consideration given to the party responsible for
the violation. The owner/operator submitting the NOI shall retain

NPDES GENERAL PERMIT FOR STORM WATER DISCHARGES FROM
CONSTRUCTION ACTIVITIES THAT ARE CLASSIFIED AS "ASSOCIATED WITH
INDUSTRIAL ACTIVITY" BY EPA REGULATION (PERMIT NO.: SCR100000)

CO-PERMITTEE AGREEMENT (PAGE 2)

all contractor certifications for at least three years er a
contractor has completed work at the site. Copies all
contractor certifications and a copy of Permit No.: SCR1000C shall
be retained on the site of the construction activity The
owner/operator of the construction project covered by Per:.lt No.:
SCR100000 shall make all contractor certifications available upon
request to the Department.

CONTRACTOR'S CERTIFICATION

Certification as co-permittee with (name of
owner/operator of construction project covered under general permit) under the
South Carolina NPDES General Permit for Storm Water Discharaes From
Construction Activities That Are Classified As "Associated With Industrial
Activity" By EPA Regulation (Permit No.: SCR100000).

I certify under penalty of law that I understand the terms and conditions of
the National Pollutant Discharge Elimination System (NPDES) permit that
authorizes the storm water discharges associated with industrial activity from
the construction project of the owner/operator identified as part of this
certification.

Signature I For I Responsible for

(Name) (Company)

(Position) (Street/P.O. Box)
VActivity)

(Signature) (city, State, Zip)

Date: Phone:

(Name) (Company)

(Position) (Street/P.O. Box)
(Activity)
(Signature) (City, State, Zip)
Date: Phone:

APPENDIX E

SAMPLE CONSTRUCTION PLACARD

SC Department of Health Notice of Authorization
and Environmental Control For Land Disturbance

Expiration Date:

Permittee: Permit Number:

Address of Permittee: Date Issued:

Name of Project:
Engineer/Plan Reviewer

City:

County: Date

X I : O: .\ f

APPENDIX F

NOTIFICATION OF INITIATION OF LAND DISTURBING ACTIVITY

AND REQUEST FOR FINAL SITE INSPECTION LETTER

Date:

Mr. John Doe
Department of Health and
Environmental Control
Stormwater Management Section
2600 Bull Street
Columbia, SC 29201

RE: Start of Construction
Project:
County:

Dear Mr. Doe:

This letter is to inform the Department of Health and Environmental Control (DHEC) that land
disturbance on the above referenced project will begin on .(date . The following contact person
will be responsible for ensuring compliance with the Stormwater Permit.

ON-SITE CONTACT:

ADDRESS:

TELEPHONE #:

Sincerely,

Project Manager
Company Name

cc: Local DHEC District Office

S. C. DHEC WATER POLLUTION CONTROL
DISTRICT STORMWATER CONTACTS

DHEC DISTRICT COUNTIES

UPPER SAVANNAH DISTRICT ABBEVILLE, EDGEFIELD, GREENWOOD
613 Main Street LAURENS, MCCORMICK, SALUDA
Greenwood, SC 29646
(803)223-0333

LOWER SAVANNAH DISTRICT AIKEN, ALLENDALE, BAMBERG
218 Beaufort Street N. E. BARNWELL, CALHOUN, ORANGEBURG
Aiken, SC 29801
(803) 641-7670

APPALACHIA DISTRICT I ANDERSON, OCONNEE
P. O. Box 1906
2404 N. Main Street
Anderson, SC 29621
(803) 260-5569

LOW COUNTRY DISTRICT BEAUFORT, COLLETON, HAMPTON, JASPER
1313 13th Street;
Port Royal, SC 29935
(803) 522-9097

TRIDENT DISTRICT BERKELEY, CHARLESTON, DORCHESTER
2470 Air Park Road
N. Charleston, SC 29418
(803) 740-1590

APPALACHIA DISTRICT III CHEROKEE, SPARTANBURG, UNION
P. O. Box 4217
151 E. Wood St.
Spartanburg, SC 29303
(803) 596-3800

CATAWBA DISTRICT CHESTER, LANCASTER, YORK
P. O. Box 100
1001 West Grace Ave.
Fort Lawn, SC 29714
(803) 285-7461

PEE DEE DISTRICT CHESTERFIELD, DARLINGTON, DILLON
145 E. Cheves St. FLORENCE, MARION, MARLBORO
Florence, SC 29501
(803) 661-4825

DHEC DISTRICT COUNTIES

WATEREE DISTRICT CLARENDON, KERSHAW, LEE, SUMTER
P. O. Box 1628
105 North Magnolia St.
Sumter, SC 29151
(803) 778-1531

CENTRAL MIDLANDS DISTRICT FAIRFIELD, LEXINGTON, NEWBERRY
P.O. Box 156 RICHLAND
Building #5
State Park, SC 29147
(803)935-7015

WACCAMAW DISTRICT GEORGETOWN, HORRY, WILLIAMSBURG
1705 Oak St. Plaza, Suite 2
Myrtle Beach, SC 29577
(803) 935-7015

APPALACHIA DISTRICT II GREENVILLE, PICKENS
301 University Ridge, Suite 5800
Greenville, SC 29601
(803) 241-1090

Date:

Mr. John Doe
Department of Health and
Environmental Control
Stormwater Management Section
2600 Bull Street
Columbia, SC 29201

RE: Final Site Inspection Request
Project:

Dear Mr. Doe:

This letter is to certify that construction of the stormwater management system at the above referenced
project has been completed in accordance with the approved plans and specifications. This certification
is based upon periodic observations of construction and a final inspection for design compliance by me
or a representative of my office who is under my supervision. Any changes from the approved plans
are shown on the attached as-built drawing (if applicable).

I would like for DHEC to schedule a final site inspection for design compliance on:

DATE:

Sincerely,

Project Engineer
Company Name

cc: Local DHEC District Office

APPENDIX G

DESIGN GUIDELINES FOR SEDIMENT CONTROL

REPORT

ENGINEERING AIDS AND DESIGN GUIDELINES
FOR CONTROL OF SEDIMENT
in
SOUTH CAROLINA

Prepared
by

JOHN C. HAYES AND ASSOCIATES
John C. Hayes, PE
Billy J. Barfield, PE
110 Valley View Drive
Clemson, SC 29631

Prepared
for

South Carolina Land Resources Commission
South Carolina Department of Highways
and Public Transportation
Columbia, SC
South Carolina Coastal Council
Charleston, SC

8/31/94

ENGINEERING AIDS REPORT- PAGE 2

REPORT
ENGINEERING AIDS AND DESIGN GUIDELINES
FOR CONTROL OF SEDIMENT IN SOUTH CAROLINA'

John C. Hayes and Billy J. Barfield

Introduction

Simulations using a modified version of SEDIMOT II estimated the effectiveness of structures
for sediment control in four different physiographic regions of South Carolina. For the
purposes of this work, we separated the state into four (4) major land resource areas -
piedmont, sand hills, coastal plain, and tidal area. Treatments also included multiple
watershed sizes, land uses, and soil textures in each land resource area. The evaluation
included a wide range of slope lengths, slopes, pond dimensions, watershed shapes, as well as
other factors that are required for specific structures. Impacts of various controls on
downstream sediment load were evaluated using generated hydrographs and sedimentgraphs
from watersheds. Design aids in the form of graphs were developed to simplify design for
typical conditions and avoid simple rule-of-thumb design estimates. These design aids are a
compromise between detailed simulations and simple rules-of-thumb.

Background

Recently regulations have been instituted that require control of stormwater runoff and
sediment discharge. Standard techniques are recommended for runoff, but methods for
designing structures for sediment control are lacking.

The described work includes estimation of performance of sediment detention ponds, filter
fences, and rock ditch checks. The performance of each control was simulated using a
modified version of SEDIMOT II with South Carolina's specific conditions and compared
with existing regulations in the state. From these simulations, design aids were developed that
are consistent with the sediment performance standards required by the state regulations.

Effectiveness of control is commonly determined by either a water quality design standard or
a performance standard. For sediment control, a water quality performance standard dictates
a maximum acceptable level of sediment in the effluent. The control is designed such that this
concentration is not exceeded. On the other hand, a water quality design standard establishes
a standard pond design based on a given drainage area or similar criterion. There are obvious

The Design Aids are provided,"As Is" without warranty of any kind, either
expressed or implied. In no event shall the authors or John C. Hayes and
Associates be liable for any damages (incidental, consequential, or other), lost
profits, or lost savings arising from the use or inability to use the methods
presented.

ENGINEERING AIDS REPORT - PAGE 3

benefits associated with each method. Performance standards offer site specific water quality
control, but require considerable on-site collection of information for design purposes and are
more difficult to review. Structures designed for performance standards have a higher design
cost than structures .designed for water quality design standards since estimation of effluent
concentration is difficult and requires complex calculations. However construction costs tend
to be considerably less, since design standards are inherently conservative. Design standards,
on the other hand, are more easily employed and complied with. A preferable alternative to
these methods is to provide a design procedure that meets a performance criteria without
requiring excessive design costs. To achieve this, the design is typically expected to be
slightly conservative, but considerably less conservative than if developed from a design
standard.

A typical approach under the performance philosophy is to size a control to meet a water
quality standard such as a total suspended solids (TSS) or settleable solids (SS) standard.
Trapping efficiency can also be used, but this fails to account for incoming sediment
concentration. Specific requirements for permanent stormwater management and sediment
control plan approval shown in the S.C. Stormwater Management and Sediment Reduction
Regulations include discharge rates and hydrographs for stormwater runoff. Additionally,
sediment basins or other practices must be designed to meet a removal efficiency of 80
percent suspended solids or 0.5 ml/l peak settleable solids concentration from a 10-yr, 24-hr
design storm.

Potential Benefits

The intent of this work was to develop area specific design methods that give reasonable
assurance that effluent meets desired sediment performance standards without the lengthy
design process typically associated with designs developed to meet a performance standard.
This approach benefits regulatory agencies and developers because the time required for
design of controls for "typical" situations would be straightforward and minimized. Plan
reviewers do not have to labor through detailed calculations. The use of area specific design
methods provides a means of achieving sediment control without the steep learning curve
associated with simulation techniques. This allows engineers to gradually gain experience and
expertise in design of sediment controls. As reviewers and planners become more experienced
with the procedures, they may move to modeling techniques or other methods. (For large
scale developments or in sensitive areas, it is still anticipated that site specific data and other
procedures such as modeling be used for detailed evaluation of sediment controls.) Adoption
of area specific design techniques among state and local agencies helps to standardize use of
the practices, reduce confusion, and promote adoption of design techniques.

Methodology

The project began with site visits at numerous locations in each of the land resource areas of
the state in order to see innovative methods, as well as areas needing improvement.
Evaluation of existing modeling capabilities led to major revisions in the SEDIMOT II model

ENGINEERING AIDS REPORT - PAGE 4
to allow evaluation of a wide range of sediment control technologies is a seamless manner.
These modifications present South Carolina with the opportunity to have a major new tool in
the analysis and design of stormwater and sediment control structures. Input data bases were
generated for all major land resource regions and results from almost half a million runs of
the model were used to develop the simple design aids.

The tour of South Carolina construction sites revealed that channel erosion was a significant
problem in many watersheds, indicating a need for a channel erosion component to the
model. The existing routine in SEDIMOT II allows only for deposition in channels, no
erosion.

The tour of South Carolina also showed that filter fences were often not put on the contour,
but were placed to allow flow to move along the fence to a low spot. This flow frequently
caused significant erosion along the fence and undercutting of the fence, making the fence
ineffective. It was postulated that a saw tooth type arrangement on the fence would prevent
this erosion, but no method was available to predict the effectiveness of the fence under this
condition. This required that a method be developed to determine the location of points
where flow would move through the fence.

After investigating possibilities for modifying the existing routines in SEDIMOT II, it was
determined that the inaccuracies in hydraulic routing when the pond routine is used for small
structures and the lack of adequate sedimentation routines in the check dam routine meant that
a major program modification was necessary. Because of the availability of a new hydraulic
routine that is accurate over a wide range of structural sizes and types, it seemed prudent to
make such a modification. The process used was to:

Develop a common model for reservoir routing which utilizes continuous functions for
discharge and stage storage rather than discrete stage points.

* - .Develop physically based and tested methodologies for predicting stage discharge
relationships for commonly used sediment control structures.

* Combine these routines with the CSTRS routines used in SEDIMOT II.

Modify the model to include channel erosion.

* Evaluate the effects of a saw tooth arrangement on filter fence effectiveness.

Each of these tasks has been accomplished and the results are a series of graphs that can be
used as an aid for designing sediment control structures. It should be recognized that aids
such as these are developed for typical conditions. Other methods should be used if the
situation is environmentally sensitive or hazardous. In all cases, good engineering judgement
should be considered as an essential ingredient in design.
/

ENGINEERING AIDS REPORT- PAGE 5

Design Aids

Each of the design aids will be briefly described and then examples will be used to
demonstrate their use in realistic problems. The first aid (Figure 1) plots particle settling
velocity as a function of eroded particle diameter. Each of the structures requires use of a
reference settling velocity. The diameter that is referred to as D15 was chosen for the
reference diameter. This diameter corresponds to a point on the eroded particle size
distribution curve such that 15% of the particles (by weight) are equal to or smaller than this
size. Personnel from the former S.C. Land Resources Commission have previously
developed estimated eroded size distributions for South Carolina soils. The procedure used
the primary particle size information reported by the Soil Conservation Service as part of
county soil surveys. The information is now available from S. C. Department of Health and
Environmental Control. By plotting "fraction finer than" versus "diameter," Ds can be read.
Once D15 is found, settling velocity can be read directly from Figure 1.

Figure 2 plots the ratio q,/AV,5 versus percentage of trapping efficiency. For ponds, the
ratio is defined by

Ratio = qpo (1)

where q,. is peak outflow rate from the pond in cfs, A is the surface area of the pond at the
riser crest in acres, and V1, is settling velocity, in fps, of the characteristic eroded particle
corresponding to D15. Upper limits on site conditions for ponds are included with Figure 2.

Two curves are presented. The curve shown as Figure 2a for soils including Piedmont,
Sandhill, Coastal, and Tidal area soils, except as noted subsequently. For the Piedmont,
Coastal, and Tidal areas, soils are classed as either coarse (sandy loam), medium (silt loam),
or fine (clay loam). Sandhill soils include coarse (sand), medium (sandy loam), and fine (silt
loam) because of the prevalent textures in this region. These classifications are summarized
in Table 1. The line shown as Figure 2b is for tidal soils (sands and sandy loams that are
classified in hydrologic soil group D because of high water table). The ratio should be less
than or equal to the curve value at any given trapping efficiency. For example at 80%
trapping efficiency, the ratio is equal to 2.2E5 for most soils as shown in Figure 2a. If the
ratio qpc AV,5 intersects the curve at a point having a trapping efficiency less than the desired
value, the design is inadequate and must be revised. Ratios above the design curves are not
recommended for any of the design aids.

ENGINEERING AIDS REPORT - PAGE 6

Table 1
Soil Groupings for Design Aids
Land Resource Region Coarse Medium Fine
Piedmont, Coastal and Sandy Loam Silt Loam Clay Loam
Tidal
Sand Hills Sand Sandy Loam Silt Loam
Tidal (High Water Table) Sandy Loam Silt Loam Clay Loam

The next design aid (Figure 3) is for rock ditch checks. Again there is a ratio plotted versus
trapping efficiency. For rock ditch checks the ratio is calculated as

Ratio = a(2)

where S is the channel slope in percent, q is flow through the check in cfs/ft, V,5 is the
settling velocity, in fps, of the eroded D15 size particle in mm, and a and b are coefficients.
Figure 3 also contains upper limits for site conditions appropriate for the design aid.

The ratio is calculated using the curves developed in Haan et al. (1994)2 to obtain the
coefficients a and b. The three plots shown as Figure 3a, 3b, and 3c correspond to fine,
medium, and coarse textures, respectively. Please refer to Table 1 for determination of
which line to use for a particular soil. As indicated by the note in the gray area above the
lines, values of the ratio in Figure 3 should be equal to or less than the curve values.

The design aid shown as Figure 4 corresponds to silt fence placed in an area downslope from
a disturbed area where it serves to retard flow and cause settling.; Two conditions must be
met in order to have a satisfactory design.

1. Trapping efficiency must meet the desired level of control.
2. Overtopping of the structure must not occur, since failure is likely if it does occur.

As with any structure, the design should recognize that longterm maintenance is necessary.
The fence design aid contains a single line that is appropriate for all soil textures as shown in
Figure 4. Again Xthe ratio is plotted versus trapping efficiency. For the silt fence, the ratio is
calculated as
Ra tio = (3)

:Haan, C.T., B.J. Barfield, and J.C. Hayes. 1994. Hydrology and
Sedimentology of Small Catchments. Academic Press. San Diego, CA.

ENGINEERING AIDS REPORT - PAGE 7

where q, is peak outflow through the fence in cfs, V1s is settling velocity, in fps, of the
eroded D15 size particle, and P,, is the potential ponding area upslope of the fence in ft2.
Figure 4 includes a listing of upper limits for the site conditions for the fence design aid.

The ponded area can be estimated by reducing the height of the fence by 1.0 ft (to allow for
burying 0.5 ft and 0.5 ft for freeboard). Use the remaining height to find the distance of a
horizontal line extending from the fence top to its intersection with the ground surface up
slope of the fence (should be equal to the ground slope times the fence height). Multiply this
distance by the available width for ponding to obtain the potential ponding area. As for other
structures, the final filter fence ratio value should be less than or equal to the line value for a
specified trapping efficiency.

Estimating V,,

A common feature of each of the design aids is that a characteristic settling velocity for the
eroded soil must be obtained. For these design aids, the characteristic settling velocity
required corresponds to an eroded size such that 15% of the sediment has particles smaller
than the size specified. A diskette containing acceptable eroded size distributions for South
Carolina soils is available from the South Carolina Department of Health and Environmental
Control. The user should recognize that eroded size distributions used in sediment control
design are frequently quite different from primary size distributions that are often determined
for other construction purposes. The user should note that DIs is often smaller for coarse
textured (more sandy) because of the reduced clay content and the lack of aggregation.

Example Problems

The example problems serve to illustrate the use of the design aids for calculation of trapping
efficiency for various types of structures. Basic soils, hydrologic, and hydraulic information
are combined. Methods as required by Standards for Stormwater Management and Sediment
Reduction (72-300) may be used to estimate the peak flows. Site specific soils information
can generally be found from county soil surveys. Hydraulic information is obtained by
combining site and structural information.

In all cases, a ratio is calculated. The ratio is used to locate the point on a turning line for
the specified conditions and structure. Trapping efficiency is then found by turning to the x-
axis and estimating trapping efficiency. The design aids are intended to be slightly
conservative, but use of the design aids should not override use of good engineering
judgement. Questionable results should be investigated by the engineer. In addition, the
engineer should consider installation and maintenance of all structures. For example, it may
be appropriate to add baffling to a pond in order to prevent short circuiting between the
inflow and outflow locations.

The user should recognize that the intent of the design aids is to provide an estimate of
trapping efficiencies for "typical" structures. Extreme or critical situations necessitate that

ENGINEERING AIDS REPORT- PAGE 8

more detailed analyses be conducted. For example, sensitive areas in steep terrain would be
an example of an extreme situation. Additionally, it is not the intent of this document to
present detailed descriptions of hydrologic or hydraulic methods.

Design techniques can best be illustrated by following the steps shown in the following
examples.

Examdle Problem 1 - Sediment Pond.

A sediment pond is to be constructed on a 30-acre commercial site in Richland County, SC.
The following information is available for the site based on soil, hydrologic, and hydraulic
conditions.

The eroded size distribution is for a coarse soil (Pelion and Fuquay mix) with Dls
equal to 0.024 mm.
Peak outflow from the pond cannot exceed 11.2 cfs.
Allowable surface area of the pond at the riser crest is 1.67 ac.

Determine whether the sediment pond' is adequately sized for satisfactory trapping.

Solution:

Steps
- 1. Go to Figure 1 with Di5 = 0.024 mm and determine settling velocity V,5 = 0.001 fps.
2. Calculate the ratio q,/AV,5= 11.2/(1.67)(0.001) = 6700 = 6.7E3
3. Enter Figure 2a on y-axis with ratio = 6.7E3, go to line and turn to x-axis to read
trapping efficiency.
4. Trapping efficiency is approximately equal to 92%, therefore okay.

Examnle Problem 2 - Sediment Pond.

A sediment pond is to be constructed in a tidal area having a high water table. The following
information is available for the site near the coast.

The eroded size distribution is for a coarse soil with Dis equal to 0.04 mm.
Peak outflow from the pond is 10 cfs.
Allowable surface area of the pond is 0.25 ac.

Determine whether the structure will provide at least 80% trapping.

ENGINEERING AIDS REPORT - PAGE 9
Solution:

Steps
1. Go to Figure 1 with D,5 = 0.04 mm and determine settling velocity V,, = 0.004 fps.
2. Calculate the ratio qpo/AV1s= 10/(0.25)(0.004)= 10,000 = 1.0E4
3. Enter Figure 2b (since high water table) on y-axis with ratio = 1.OE4, go to line and
turn to x-axis to read trapping efficiency.
4. Trapping efficiency is approximately equal to 77%, therefore a larger pond is required
if it is desired to have a trapping efficiency of at least 80%:.
5. Assume that surface area can be increased to 0.67 ac, calculate the ratio qpo/AV15=
10/(0.67)(0.004) = 3700 = 3.7E3.
6. Reading the trapping efficiency from Fgure 2b using this value yields a trapping
efficiency of 81%, which is okay. (Note: If there had been no high water table,
Figure 2a would be used, and the smaller pond area would be sufficient.)

Examnle Problem 3 - Rock Ditch Check.

Estimate the trapping efficiency of a rock ditch check to be installed in a Piedmont channel
draining a clay loam soil. The following information is available based on soil, hydrologic,
and hydraulic conditions.

The eroded size distribution is for a fine soil with D,5 equal to 0.0042 mm.
Peak outflow from the ditch check is 0.211 cfs with an average width (perpendicular
to flow) of 7.4 ft and a flow length through the check of 6 ft (refer to Haan et al.,
1994, page 151 for procedures to calculate flow through a ditch check).
Rock diameter is 0.10 ft.
Slope of the channel is 0.5%.

Solution:

Steps
1. Go to Figure 1 with D5, = 0.0042 mm and determine settling velocity V15 = 3E-5 fps.
2. Before proceeding further, the flow rate must be converted to a flow per foot width.
Thus divide 0.211 cfs by the width of 7.4 ft to obtain a q = 0.028 cfs/ft.

Appropriate values of the coefficients a and b can be obtained from Haan, et al. (1994)
based on the rock diameter and the average flow length through the check. For this
example, the appropriate values can be read using the rock diameter equal to 0.03 m
and flow length equal to 6 ft to obtain a = 3.05 and b = 0.66.

Substitute all values and calculate the ratio

Sq( l)/aV,, = (0.5)(0.028('466) )/(3.05)(3E-5) = 1620 = 1.62E3

: : X f :~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ENGINEERING AIDS REPORT:- PAGE 10
3. Enter Figure 3a on y-axis with ratio = 1.6E3, go to line and turn to x-axis to read
trapping efficiency.
4. Trapping efficiency is greater than 95%, therefore okay.

Examnle Pmroblem 4 - Rock Ditch Check

A rock ditch check is to be installed at a Coastal Plains site having a sandy loam soil. For
comparison, hydrologic and hydraulic conditions as used in Example Problem 3 will be used.

The eroded size distribution is for a fine soil with DI5 equal to 0.04 mm.
Peak outflow from the ditch check is 0.211cfs with an average width (perpendicular
to flow) of 7.4 ft and a flow length through the check of 6 ft.
Rock diameter is 0.10 ft.
Slope of the channel is 0.5%.

Determine whether the ditch check will exceed 80% trapping efficiency for the conditions
indicated.

Solution:

Steps
1. Go to Figure 1 with DI5 = 0.04 mm and determine settling velocity V,5 = 2.8E-3 fps.
2. Before proceeding further, the flow rate must be converted to a flow per foot width.
Thus divide 0.211 cfs by the width of 7.4 ft to obtain a q = 0.028 cfs/ft.

Since the same conditions were used, values of the coefficients a and b are as found in
Example Problem 3 so that a = 3.05 and b = 0.66.

Substitute all values and calculate the ratio

Sq(b)/aV15 = (0.5)(0.028(I'66) )/(3.05)(2.8E-3) = 17

3. Enter Figure 3c on y-axis with ratio = 17 and go to line. Note that since the value
falls BELOW the line, the trapping efficiency exceeds 95%.
4. Trapping efficiency is greater than 95%, therefore okay.

Example Pmblem,5 - Rock Ditch Check.

A rock ditch check is to be installed in a channel draining highway construction on a sandy
loam soil in the Coastal Plains. The following information is available based on soil,
hydrologic, and hydraulic conditions.

The eroded size distribution is for a fine soil with D,5 equal to 0.04 mm.
Peak outflow from the ditch check is 2.0 cfs with an average width (perpendicular to

:ENGINEERING AIDS REPORT - PAGE 11

flow) of 4.4 ft and a flow length through the check of 6 ft.
Rock diameter is 0.10 ft.
Slope of the channel is 1.0%.

Determine the trapping efficiency under. the specified conditions.

Solution:

Steps
1. Go to Figure 1 with D,5 = 0.04 mm and determine settling velocity V,5 = 2.8E-3 fps.
2. Before proceeding further, the flow rate must be converted to a flow per foot width.
Thus divide 2.0 cfs by the width of 4.4 ft to obtain a q = 0.45 cfs/ft.

Sq(-b)/aVI = (1.0)(0.45('O6-) )/(3.05)(2.8E-3)= 90

3. Enter Figure 3a on y-axis with ratio = 90, go to line and turn to x-axis to read
trapping efficiency.
4. Trapping efficiency is greater than 95%, therefore okay..

Example Problem 6 - Filter Fence at Toe of Slone.

A wire-backed silt fence is to be built from fabric which is 3 ft wide. the installation is to
be at the toe of a slope which drains highway construction in the Piedmont. The following
information is available based on soil, hydrologic, and hydraulic conditions at the site.

The eroded size distribution is for a fine soil with D15 equal to 0.0042 mm.
Peak outflow from the up slope area is 1.9 cfs.
The potential area for impoundment up slope of the fence is 0.116 ac. (5050 ft2).
Freeboard. allowance and installation will reduce the usable height of the fence from 3
ft to 2 ft.
The potential length of filter fence along the toe of the slope is 60 ft.

Determine whether the fence will carry this flow with a trapping efficiency of at least 80%
without overtopping.

Solution:

Steps
1. Go to Figure I with D,5 = 0.0042 mm and determine settling velocity V,5 = 3E-5 fps.

ENGINEERING AIDS REPORT - PAGE 12

2. Calculate the ratio qpoNVPa= 1.9/(3E-5)(5050) = 12.5,
3. Reading the trapping efficiency from Figure 4 with the ratio equal to 12.5 finds that
the trapping efficiency is approximately 55% -- hence the fence is inadequate.

ExamDle Problem 7 - Filter Fence at Toe of Slone.

Reconsider the situation described in example problem 6 with the only difference being that
the D15 is 0.04 mm. Determine whether the fence will carry this flow with a trapping
efficiency of at least 80% without overtopping.

Solution:

Steps
1. As seen previously, V,5 equals 2.8E-3 fps for this size particle.
2. Calculate the ratio qpO/VP,r,= 1.9/(2.8E-3)(5050) = 0.13
3. Reading the trapping efficiency from Figure 4 with the ratio equal to 0.13 finds that
the trapping efficiency is approximately 82% -- hence the fence is adequate from the
standpoint of trapping efficiency.
4. The length of fence required to pass the peak flow without overtopping can be found
by comparing the peak flow per foot width with the slurry flow rate of the fabric.
Haan, et al. (1994, Table 9.11 and 9.12) contains slurry flow rates for a variety of
fabrics. A reasonable value for filter fence is 10 gpm/ft2.
5. Convert the peak flow to gpm so that
qO= (1.9 ft3/sec)(7.48 gal/ft3)(60 sec/min) = 853 gpm
6. The required length of fabric to carry this flow can now be found by dividing the peak
flow rate by the effective height (2 ft since I ft is lost because of installation) and the
slurry flow rate. Hence, the length of fence required to carry the peak flow without
overtopping is

L = 853/(2)(10)= 43 ft

Since 43 ft is less than the 60 ft available, the fence will perform adequately.
S;~ ~ ~ ~ ~~ ~t abe the:: fe c wil pe:r adequately.

ENGINEERING AIDS REPORT -PAGE 13

I - ................. ......................
IE~~~~~~~~~~~~~~~~~~~~~~~~~~.... -2-- ......~ ........

I E-2 .................~

IE-3

I E-4

0.001 001~ ~~~~~~~~~~~~~co 0.11
ERODED PARTICLE DIAMETER (mm)

Figure 1. Settling velocity as a function of eroded particle diameter.

ENGINEERING AIDS REPORT - PAGE 14

LIMITS ON VALUES FOR PONDS

watershed area :5 30 acresI

overland slop e�20I

loutlet diameter � 6 ft

1ES
-~~~~~ ~ ~~~ ~~~~~ . .. . ... .. . . ...... .........................

I E4 .-..-.-...
0~~ ~ ~~~~~~~~~~~~~~~~ . _ __ .--. ....-- - - - .-.- . ........ .....

1E3 ~~~~~~ ~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~.-... . -.--.-. ....

1E2
70~~~~~~~~~~~~~~~~~~~. 75 80 8. ..... .95.......
Cr ~ RPIN FIIEC %

Figur .a. .eig ............. for trappi. .....yofpnsnt oae no-ynaeswt
high water~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.... tbe...........

ENGINEERING AIDS REPORT - PAGE 15

LIMITS ON VALUES FOR PONDS
watershed area:5 30 acres
overland slope < 20%:
Ioutlet diameter:5 6 ftI

I ES . . . . ... ... . ....

1E4 --.- --or

1Er

IEI

70 75 so 85 90 95
TRAPPING EFFICIENCY(%

Figure 2b. Design aid for estimating trapping efficiency of ponds located in low-lying areas
having high water tables..

ENGINEERING AIDS REPORT - PAGE 16

LIMITS ON VALUES FOR
CHECKS
watershed areas < 5 acres
overland flow length 5 500 ft
overland slope < 15%
maximum depth _< 6 ft

1E5

1E3
60 65 70 75 80 85 90 95
TRAPPING EFFICIENCY (%)

Figure 3a. Design aid for'estimating trapping efficiency of rock ditch checks with fine
texture soils.

ENGINEERING AIDS REPORT - PAGE 17

LIMITS ON VALUES FOR
CHECKS
watershed areas < 5 acres
overland flow length < 500 ft
overland slope < 15%
maximum depth < 6 ft

~ -- :=~-=~:-~= : '=: :-:-.~ : ?- :'--:::::-:::':
I . .......... . .- ........... .. .... . ........... ...............
~~~~~~~~~~~~~~~~~~~~~~~~~~.M _. _ ...... _... .__.... _ _._._

60 65 70 75 80 85 90 95
> 1E4 __ ~~~~~~~~......... __. ....___._ ......__

TRAPPING EFFICIENCY (%)

Figure 3b. Design aid for estimating trapping efficiency of rock ditch checks with medium
texture soils.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~. ::.::..... :._ ::::= .:_=.: :_ ::
cn _____ .......... . . __............ _...... _. ............ _............._.
. .. =. ..... _ ......~~. ........ . ... .. . ....... .. . ........ .... ......._.............

I1E3 j _
60 65 :70 :75: 80 i:86 90 95
TRAPPING EFFICIE0NCY(%

Figure 3b. fDesign aid for testimating trapping efficiency of rock ditch checks with medium
texture soils.:

ENGINEERING AIDS REPORT - PAGE IS

LIMIT ON VALUES FOR
CHECKS
watershed areas:� 5 acres
overland flow length � Soo ft
overland slope < 15%
maximum depth < 6 ft

I E4 - -
--~~~ ~~ ~~~~ ~ ~~~~~~~~~~~~~~~~~~~~~.. . - . -..1 1 7

'I E3 .... .....

Er oi,-..---z~.

1E2
60~~ 65 7 0 75 ~80 85 90 95
TRAPPING EFFICIENCY(%

Figure 3c. Design aid for estimating trapping efficiency of rock ditch checks with coarse
texture soils.

ENGINEERING AIDS REPORT - PAGE 19

LIMIT ON VALUES FOR FENCE
watershed area -< 5 acres
overland flow length ~5 500 ft
overland slope < 6%
slurry flow rate < 10-gpmlft'
maximum height < 3 ft

I~~~~~~~~~~~~ 0

~~~~~~~~~~~~~~~~~~~~~~~~... . .. -~

0.01
50 55 60 65 70 75~ 80 85 90 95
TRAPPING EFFICIENCY(%

Figure 4. Design aid for estimating trapping efficiency of silt fence.

APPENDIX H

RAINFALL DATA FOR SOUTH CAROLINA

C~~~~~~

South Carolina Rainfall Data

COUNTY NAME RETURN PERIOD 24 HOUR STORM EVENT (INCHES)

1 2 5 10 25 50 100 R Factors

Abbeville 3.2 3.7 4.8 5.7 6.5 7.0 8.0 250
Aiken 3.2 3.7 4.9 5.8 6.7 7.3 8.0 250
Allendale 3.4 3.9 5.1 6.0' 6.9 7.8 8.5 300
Anderson 3.3 4.0 5.2 5.9 6.7 7.5 8.0 275
Bamberg 3.4 3.9 5.2 6.0 6.9 7.8 8.5 300
Barnwell 3.3 3.9 5.1 5.9 6.9 7.7 8.2 275
Beaufort 3.7 4.5 '5.9 6.8 7.8 8.8 10.0 400
Berkeley (North) 3.5 4.2 5.5 6.4 7.3 8.2 9.3 350
Berkeley (South) 3.6 4.4 5.7 6.7 7.6 8.5 9.8 350
Calhoun 3.3 3.8 5.0 5.9 6.7 7.5 8.2 275
Charleston 3.8 4.6 5.9 6.8 7.8 8.8 10.0 400
Cherokee 3.0 3.5 4.5 5.0 6.0 6.7 7.0 275
Chester 2.9 3.5 4.5 5.1 6.0 6.8 7.3 250
Chesterfield 3.1 3.7 4.8 5.5 6.3 7.2 7.9 275
Clarendon 3.4 4.0 5.1 6.0 6.9 7.8 8.7 300
Colleton (North) 3.5 4.2 5.4 6.3 7.2 8.0 9.1 350
Colleton (South) 3.6 4.4 5.7 6.7 7.7 8.5 9.6 350
Darlington 3.2 3.8 5.0 5.7 6.5 7.5 8.3 300
Dillon 3.3 3.9 5.2 5.9 6.8 7.8 8.6 325
Dorchester (North) 3.4 4.2 5.4 6.3 7.2 8.0 9.1 325
Dorchester (South) 3.6 4.4 5.7 6.7 7.6 8.5 9.6 325
Edgefield 3.2 3.7 4.7 5.7 6.5 7.1 7.9 250
Fairfield 3.0 3.5 4.5 5.3 6.1 6.9 7.6 250
Florence 3.3 4.0 5.2 6.0 6.8 7.8 8.8 325
Georgetown 3.6 4.5 5.7 6.7 7.7 8.7 9.8 350
Greenville (North) 4.0 5.0 5.8 6.1 7.3 8.2 8.8 300
Greenville (South) 3.4 4.0 5.0 5.7 6.6 7.3 8.0 300
Greenwood 3.1 3.7 4.7 5.6 6.4 7.0 7.8 250
Hampton 3.44 6.3 7.2 8.0 8.9 325
Horry (North) 3.4 4.0 5.4 6.3 7.3 8.2 9.3 350
Horry (South) 3.6 4.5 5 6. 7.6 8.6 .9.7 7.350
Jasper 3.5 4.3 5.7 6.7 7.6 8.3 9.3 350
Kershaw 3.1 3.7 4.7 5.5 6.3 7.2 7.9 275
Lancaster 3.0 3.6 4.6 5.3 6.1 7.0 7.6 250
Laurens 3.1 3.7 4.7 5.5 6.2 7.0 7.7 250
Lee 3.2 3.8 5.0 5.7 6.5 7.5 8.3 275
Lexington 3.1 3.7 4.8 5.6 6.5 7.2 7.9 250
Marion (North) 3.3 3.9 5.3 6.0 6.9 7.8 8.8 325
Marion (South) 3.4 4.2 5.4 6.3 7.2 8.2 9.2 325
Marlboro 3.2 3.8 4.9 5.7 6.6 7.6 8.2 300
McCormick - 3.2 3.7 4.8 5.7 6.5 7.0 7.5 250
Newberry 3.0 3.6 4.5 5.4 6.1 7.0 7.5 250
Oconee (North) 4.5 5.3 7.0 8.0 9.1 9.8 11.0 300
Oconee (South) 3.5 4.6 5.8 6.5 7.5 8.0 9.0 300
Orangeburg 3.3 3.9 5.2 : 6.0 6.8 7.7 8.5 275
Pickens (North), 4.2 5.3 6.8 7.2 8.7 9.0 10.4 300
Pickens (South) 3.7 4.7 5.8 6.3 7.5 8.3 9.2 300
Richland 3.1 3.7 4.8 5.7 6.4 7.3 7.9 275
Saluda 3.1 3.7 4.7 5.7 6.4 7.3 7.9 250
Sparnbur NE Suggest use of National Weather Bureau
Spartaburg NW Publication Technical Paper 40.
SpartanburgSE Rainfall data in this area must be
Spartanburg SW predicted carefully.
Sumter 3.2 3.8 5.0 5.8 6.6 7.6 8.3 275
Union 3.0 3.5 . 4.5 5.1 6.0 6.8 7.4 250
Willimsburg 3.4 3.5 5.4 6.3 7.2 8.1 9.2 325
York 2.8 3.5 4.5 5.0 6.0 6.7 7.0 250

APPENDIX I

SAMPLE STORMWATER MANAGEMENT AND SEDIMENT

REDUCTION BEST MANAGEMENT PRACTICES

.HR . P.A...... DESIGN
lIMP D - : 1*0 IEFINITION ii iOSE . APPLICAI CONSIDE ATIN . CRITERIA
: � :-. �� ��

SEDIMENT
CONTROL
PRACTICES

SurfaceRoughening Horizontal grooves across Aids establishment All bare soil; all slopes-: Method for surface No formal design is
bare slopes,: stair stepping, of vegetation, especially those steeper than roughening based on necessary
or tracking bare soil with; reducesrunoff . 3:1: slope steepness, mowing
construction equipment velocity and ; requirements, and
Figure I: :: erosion, and ; - whether slope formed by
increases infiltration cutting and filling

Top Soiling Using topsoil: to enhance Provides suitable:, May be used in areas where Topsoil stockpiles should No design criteria is
final stabiization-of site growth m eiu m for existing soil is not suitable be protected from necessary
withvegetation :- : vegetation for vegetation erosionand
contamination

Mulching Use of a protective blanket To protect soil May be used on beds for Avoid organic mulch that Organic mulches are
of straw, plant residue, surface from forces temporary or permanent : may contain weed seeds most effective when
gravel or synthetic material of raindrop impacts, seeding and on areas of bare : uniformly spread and
on soil surface overland or sheet soil when seeding or Choiceofmulchshould esecuredtothesoil
waterflow planting must be delayed bebased on season, type structure
of vegetation, soil
condition, and size of
area

Bulldozer treads create
grooves prpendicular to hEN slape. Th
slope aoe should not be back-bladed
during the Frini grading operalion

5X hhI:Ii~~h~a- :: :..."

Slope ... -.- .

A'.

: ' X * '

Figure 1. Surface Roughening

Source: North Carolina Erosion and Sediment Control
Plannirn and Desion Manual 1988.

WHERE PL~~~~ANNING'i: DFSIGN,:

Temporary A gravel driveway or pad Provides a suitable May be used wherever C onstruction plans Aggregate Size:
(3Graveled : located at a point where location for vehicles traffic leaves a construction should limit traffic to 2"-3" washed stone
Construction Site vehicles enter and exit a to drop mud and site and enters a public road properly constructed Pad Thickness:
Entrance/Exit - construction site: . - sediment before or other pavedareas entrances to the site 6" minimum
entering public - : . : I:.Pad Widths:
roads; controls 12' minimum
erosion from surface Pad Length:
Figure 2 . :: runoff and to help : : 50' minimum
control dust
Temporary Seeding Planting fast-growing To provide May be used on cleared, Selection of appropriate No design criteria is
vegetation to provide stabilization of bare unvegetated areas where plant species, use of necessary
temporary erosion control soil areas that will temporary erosion control is quality seed, and proper
not be brought to needed bed preparation are
final grade for a important
period of more than
30 working days
Permanent Seeding Control of runoff and To economically May be used in fine-graded Planting should occur No design criteria is
erosion with permanent control erosion and areas within 30 working days necessary
vegetation sedimentation or 120 calendar days of
final grade

Same as for temporary
seeding

Sodding Use of grass sod to To rapidly prevent May be used in areas More costly than On slopes, sod should
permanently stabilize an erosion and requiring immediate and seeding, but can be be applied with longest
area sedimentation permanent vegetative cover established during times dimension
of year when grass seed perpendicular to slope
Figure 3 may fail

GRAVEL CONSTRUCTION ENTRANCE

CONSTRUCTION ENTRANCE WITH WASH RACX~

'--Ditc'h to Carry
wash water to
Sediment Basin or

sh Rack ~~~~rapI

-Reinfw-ced Cohcrete Lri Spa~ce
Detail of Wash Rack

Figure 2. Temporary Construction Entrance

Source: Storm Water and Erosion: and Sediment Control Best Manmoement Practices for
Develovina Areas. Florid

F .. -T-- : *... . ' ,-T- _. [ Lay sod in a staggered
1 ' .. .. 1 -"o _ * . n pattern with strips butted
,.,,-~~~~~ * * * _tightly against each other. A
'--'" " . .. .~ '"... ' -- wsharpened mason's trowel can
- * -- , � _ - _ ... 0 be used to tuck down the ends
i_.... - -i.7. i' .... .. � :?. 0and trim pieces.

1[ ; : Correct ;) I Butting-angled ends caused by the automatic
m_ : 0r : Incorrt _ - :sodcutting must be matched correctly.

ll" �i�, _ .
�I� I

Roll sod immediately to Water to a depth of 4 Mow when the sod is es-
achieve firm contact as soon as the sod is tablished (2-3 wks). Set
with the soil. laid, and continue the mower high (2-3").
watering as needed.
Proper instalation of grass od

Figure 3. Soddinge

Soeurc: North Carolina Erosion and Sedbment Control
Plannino and Desion ManuaL 1988.

WHERE ~~PLANIUNGDSN
BP - . DEFINITION.... ON DERATION . ERA

Outlet Stabilization Structure designed to To prevent erosion May be used at locations Riprap aprons are Capacity: 10 year
Structure control erosion at the outlet by reducing water where water velocity from a relatively low cost and peak runoff or design
of a channel or conduit velocity from the conduit, channel, pipe, easy to install discharge of
outlet of a channel diversion, etc. exceeds Riprap stilling basins or conveyance -
or conduit permnnissible velocity of the plunge pools are used whichever is greatest
receiving channel or where overfalls exit the
disposal area ends of pipes or where
Figure 4 high flow would require
excessive apron lengths
Excavated Drop An excavated area in the To trap sediment at May be used where Frequent maintenance is Drainage Area: I acre
Inlet Protection approach to a storm drain the approach to a relatively heavy storm water required Shape basin to fit site
(TI Cemporary) drop inlet or curb inlet storm water flows are expected and Temporary flooding of conditions; orient
drainage system overflow capability is the excavated area is longest dimension
needed expected toward longest innflow
area
Maintain side slopes no
Figure 5 greater than 2:1 (50%)

Fabric Drop Inlet Temporary fabric barrier To prevent sediment May be used where storm i This method must not be Drainage Area: Not
Protection placed around a drop inlet from entering the drains inlets are to be used near the edge of fill : greater than I acre
(Temporary) storm drain during operational before material and must not unless site conditions
construction permanent stabilization of divert water over cut or allow for frequent
activities; allows the drainage area occurs. fill slopes removal of sediment
early use of storm This method is used where Height of Barrier: At
drain inlet drains a nearly level least 12" - but no
area with slopes less than greater than 24"
Figure 6 5% Do not use mortar

OtL~et; Stabilization

Pipe Outlet to Flat Area-

blanket Notes
1. La Is the length of the riprap
Pipe Outlet to Well-defined arn
Channel 2. dm=1.5 times the maximum
stone diameter but not less
then 60.
3. in a well-defined channel ex-
tend the apron up the channel
A A ~~~~~~~~~~banks to an elevation of 6-
A A ~~~~~~~~~~above the maximum tallwaler
depth or to the top of the bank.
whichever Is less.
4. A filter blanket or filter fabric
( L W W ~~~~~~~~~should be Installed between
Plan the riprap and sail foundation.

Iii ~iIi SecionAA14
Filler
blanket

Figure 4. Outlet Stabilization Structure

Source: North Carolina Erosion and Sediment Control
Plannmno and Desion Manual, 1998.

Excavated area (as required)

Side siope 2:1 :_u e
0111 - - - �1 I' Accumulated
at ) sediment

Excavated depth, 3 f o r 1li Gravel-supported by
min 1 -max 2' I -- dewalerin-g ja i IIJl~ hardware cloth to allow
below top ol inlel TI: i : - drainage and restrict
eflj, " sediment movement.

>--..
,~zc,�:f :-

Flow -

Excavated drop inlt prtoclion.

Figure 5. Excavated Drop Inlet Protection

Source: North Carolina Erosion and Sediment Control
Plannmino and Desion ManuaL 1988.

Stake
2 x 4 wood frame
T~~~~~~~~~~~~~~~~~~~~~

max ~ ~~~~~~~~~~~~~~~~~~~Fabric P.-'
max

II Fin'~~Min

II I I rl Buried fabric
V 'ii

Drop inlet__ S
with grate ___ )

: Frame ilmin

- I 111P
,-�~~~~ ---LIICL ~ ~ ~ ~ ~ ~ I
excess
-~h ,, -,at corners

Ingtullation of labric and auppotn m Jar iforlNt protaion.

Figure 6. Fabric Drop Inlet Protection

Source: North Carolina Erosion and Sediment Control
Plannina and Desian Manual �988.

BMP EINITION PU:::SE APPl: IDA.iE NI I D R TION CRITERIA

Sod Drop Inlet A grass sod filter area To limit sediment : May be used where the This practice is well- Drainage Area: No
Protection around a storm drain drop from entering storm drainage area of the drop suited for lawns adjacent greater than 2 acres -
inlet in a stabilized well- drainage system as a inlet has been permanently to buildings this area should be
vegetated area permanent seeded and mulched, and undisturbed or
protection measure the surrounding area is to stabilized
remain in dense vegetation Velocity of design
flow: Less than 5
Figure 7 ft./sec
Slope of Sodded Area:
Not greater than 4:1
Temporary A small temporary ponding To detain sediment- May be used at the outlets Access to the basin must Used to receive water
Sediment Trap basin formed by excavation laden runoff and to of drains, diversions, be maintained to drained from areas of
or by an embankment trap the sediment; to channels, and other runoff periodically remove 5 acres or less
protect receiving conveyances; may be sediment for proper Side slopes of
lakes, streams, installed during early site disposal excavated basins - 2:1
rivers, and other development Structure life limited to 2 or flatter
water bodies from years Cleanout trap when
FigureS sedimentation sediment reaches 'h of
the design depth
Sediment Basin A suitably located earthen To retain sediment May be used where erosion This practice applies to Drainage area: less
embankment designed to on the construction control measures are not structures 15' or less in than 100 acres; flow
capture sediment site and to prevent adequate to prevent offsite height, and whose failure length to basin width
sedimentation of sedimentation would not jeopardize ratio should be greater
offsite bodies of property or lives than 2:1 to improve
water Basin life limited to 3 trapping efficiency
years unless it is
Figure 9 designed as a permanent
structure

I I. N

Four I ft wide strips of sod on each side of the
drop inlet
Sod strips pmct~ 'mitti awea from erosion

Figure 7. Sod Dro Wnet Protection

Source: North Carolina Erosion and Sediment control
Planmina and Desion Manual. 1908.

.. min

1800 cu ftl acre

Cross section Filter fabric

Design
Designle 21 Overlill 6'
top mi n m / for settlement

I4 t 4min . , 7_
sit -%-._u2:1 side Emergency
~~~~~5 tt11 ~~~slope max by-pss
max fil Fller G' Dbelow
.fabric mI . side slope seIed top
31max Natural of dam
0 ; is C~1 \ ground
311
min

Stone section
Temporary sediment trap.

Figure 8. Temporary Sediment Trap

Source: North Carolina Erosion and Sediment Control
Plannino and Desion Manual. 19868.

SEDIMENT BASIN SCHEMATIC ELEVATIONS

Crest of
Emergency
Spilliway
'Design High Water
Min. 1.o0F
Min. 1.01i
Mm. i~~~oI iser Crest

~~~Dewatering Outlet
Sediment
'Cleanout
Permanent Pool L

Design Elevations With Emergency Spillway

~~~~Dsg High Water M.10 t
44 1U6,1 Min .0 ino4L~L~. 3.0'
\ M~~~mi. 1.0' 4
Riser Crest
Dew-atering Dutlet

Permanent Pool

* ~~~Design Elevations Without Emergency Spillway

Figure 9. Sediment Basin

source: Storm water and Erosion and Sediment Control Best Manaoemnent Practices for
Developing Areas. Florida

* j g X < 3 jf Deaf 5 gie~il..............DitMGN 0t
D~~~~~~~~WERE PLNINESG

Silt Fence Temporary sediment barrier To catch and hold May be used below small Sediment or silt fences Fence should be stable
(Sediment Fence) consisting of filter fabric or small amounts of disturbed areas less than '% should be located in for a 10 year peak
burlap stretched across sediment from acre per 100' of fence, and areas where only shallow storm runoff. Ensure
supporting posts and disturbed areas by where runoff can be stored pools can form behind that the depth of
entrenched reducing the behind the fence without them. Sediment impounded water does
velocity of sheet damaging the fence or the deposition should be not exceed 1.5' at any
Figure io and II flow to allow area behind the fence periodically removed and point along the fence
sediment deposition properly disposed of

Straw Bale Dike Temporary sediment barrier To catch and retain May be used below Straw bale dikes should Drainage area: No
constructed from a row of sediment on the disturbed areas subject to never be built in live more that 'A acre for
entrenched and anchored construction site and sheet and rill erosion where streams, swales, or everyoo 100' of barrier
straw bales prevent temporary sedimentation drainageways length. Maximum
sedimentation control is needed slope gradient behind
the barrier - no more
than 2:1 (50%0).
Figure 12 I XDesign life: Less than
Figure 12 0~~~~~~~~~~3 months

Check Dam Small, temporary stone dam To reduce erosion May be used as a temporary Check dams should not Drainage area above
constructed across a of the channel by or emergency measure to be used in live streams the check dam should
drainageway restricting the limit erosion by reducing Check dams installed in not exceed 2 acres
velocity of flow in flow in a small, open grass-lined channels may Maximum Height: 2'
the channel channel kill the vegetative lining at the center of the
if submergence after rain dam
is too long or Keep the center of the
sedimentation is too dam at least 9" lower
Figure 13 heavy than the outer edges at
natural ground
elevation

Compacted fill

Backfill min 8"
thick layer of gravel
/'Filter fabric

V-trench :1 IlI ;

Extension of fabric and wire
into the trench
Filter fabric-

Figure 10. lOSilt Fence

Source: North Carolina Erosion and Sediment Control
Plannino and Desion Manual 198.

NOTE:
SILT FENCE TO BE INSTALLED BY LOT OWNER
PRIOR TO CONSTRUCTION AND TO BE SILT FENCE
MAINTAINED UNTIL LOT IS GRADED AND r AROUND ONSITE
TURF IS ESTABLISHED. DRAINAGE STRUCTURES
I I : :(IF APPLICABLE) SILT FENCE ALONG
.*1~~~~~ f i;CRITICAL LINE
- = =. -~ _ - _- - -_ _ -(IF APPLICABLE)is
-- :-- 1- _ - --
* :: ; 0i? 7m7m7I v s
SILT FENCE %,
z ALONG R/W Xad MARSH
ALO~~NE

I ~~~~~ACCESS HE '4 '/
CONSTR. ~OSR

- v _ ~//---SILT FENCE ALONG
Irams >~- \ WETLAND BUFFER
* V / *\ PROEl (IF APPLICABLE)
. * * *\PROPERTY
Figure 1 LotSilFWEne PLINE /

:~~~~~~ :

Figure 11. Lot Silt Fence Plan

Sta ked and Entrenched
5ttaw sale

Bindina Wlire
Compacted Soil to

Sediment Laden

CROSS-SECTION OF A PROPERLY lKSTALLED SMRA BALE

'Figure 1.Straw Bale:Dike

Source: Storm Waler and Erosion and Sediment Control Best Manaoement Practices for
Develovino Areas. Florida

Filer
fabric

Ero~Secion Conro

Ston check dam-Stan. should b placed ove tdo channel banks to keep water from cwnhg wround tedam.

L The distance such that points
A and B are of equal elevation

=4 ~~~~L

Space chock dams in a channel so that the crest of downstream clam is at elevation of the too of upstream dam.

Figure 13. Temporr Check Dam

Source: North Carolina Erosion and Sedirnent Controt
Ptannino and Desian Manual. 1938.

. 7 T: � : :Di : PURPOS. APPLICABLE .N E CRITERIA....

Sand Fence (Wind: An artificial barrier of To reduce wind Maybe used in areas of S. C. Coastal Council Contact S. C. Coastal
Fence) evenly spaced wooden slats velocity at the open, bare, sandy soil has general design and Council for design
or approved fabric erected ground level and subject to frequent winds, installation requirements criteria
perpendicular to the: : :.trap blowing sand;: where the trapping of for sand fencing
prevailing wind used to build frontal blowing sand is desired
ocean dunes or
prevent sand from
blown off disturbed
areas and onto roads
or adjacent property

Vegetative Dune Use of adaptive vegetation To protect, maintain May be used in coastal Only tolerant plant Small areas and steep
Stabilization to catch and hold sand and or rebuild a barrier beachfront areas species adapted to the slopes should be
to build and repair dunes dune system dune environment can be planted by hand; large
used flat areas may be
planted with a tractor-
drawn transplanter

STORM WATER
MANAGEMENT
SYSTEMS
Grass-Lined A channel with vegetative To convey and May be used as roadside Should be located to Peak capacity
Channels lining for conveyance of infiltrate ditches, channels along conform with and use the minimum of 10 year
(Grassed Swale) storm water runoff concentrated surface property boundaries, outlets natural drainage system storm without eroding.
runoff without for diversion, and as Avoid crossing ridges or Velocity: No more
damage from. drainage for low level areas. watershed than 2 ft./sec without a
flooding, deposition Avoid sharp changes in channel liner
or erosion grade or direction of Side slopes: 3:1 or
Figure 14 channel flatter

Wet Extended A permanent pool system To provide Most effective in large, Pond should be designed Maximum Depth: 6' to
Detention Pond containing a forebay near temporary storage of intensely developed sites, to hold post-development 8' for permanent pool
the inlet to trap sediments storm water runoff usually greater than 10 acres peak storm water runoff Littoral Shelf: Extend
and a deep pool for storage before it is This is generally the most 24 hours or more for side slopes out 2' to 3'
discharged cost effective practice for 90% particulate-form or with slope of 6:1 or
downstream; urban/coastal areas suspended solid pollutant flatter
protects the removal Inlet structures
downstream channel designed to dissipate
from erosion and energy of water
sedimentation; entering the pool
Figure 15 functions as a
sediment trap and
pollution filter

TYPICAL GRASSED WATERWAY CROSS SECTIONS

I nil(L

p. ~~~~~~,a ~~~~~~ - J~~~~~isi e-i~

VCross Section Parsablic-Cross Section

Figure 14. Grassed Swale

Source: South Carolina Land Resources Conservation CornryhSissor 1985.

WET DETENTION SYSTEM

* ~~~~POND CONFIGURATION B

LITTORAY

SEDIMENT SUMP DEEPER AREA

Figure 15. Wet Extended Detention Pond

Source: Storm Waler and Erosion and. Sediment Control Best Mananement practices for
Deve~olopn Aes Florida

WHE~ PLANNING ~ i ]DESIGN
| 0 :BMP f ~ D 000 vEFINITO .l i Ad*.PPLICAt B:~L:IE RO CRITERIA

Wet Pond A pond with all of its To provide a high May be used in areas where Shallow areas around the Surface Area and
storage as a permanent pool level of urban a combination of water pond should be designed Volume: Minimum of
pollutant removal quality treatment, to encourage growth of 1.5% of the
through biological streambank erosion emergent wetland contributing catchment
uptake of aquatic protection, and flood vegetation, which area;
wetland vegetation protection is needed functions as a biological volume should equal
filter and sediment trap runoff of a 6 month,
24 hour design storm
Depth: Maximum of 6'
Geometry: Length-to-
width ratio of 3:1 or
5:1
Extended Detention - A dry extended detention To provide storm May be used in areas where One micro-pool is Care must be taken in
Micro-Pool system containing one or water runoff a higher quality of located near the riser to designing the system to
two small permanent pools control, runoff discharged storm water is protect the extended avoid resuspending
for pollution removal pollution removal, required; this system is detention pipe from previously deposited
sedimentation :: good for coastal areas where clogging materials in thelower
control, and high quality treated storm The second pool is pool; an artificial
flooding control in water runoff is important located near the inlet and wetland can be created
an area containing functions as a sediment to stabilize the
sensitive wetlands trap sediments
and forests

Extended Detention An extended detention To provide storm May be used in areas where To function properly, Pool Depth: 0' to 3'
Shallow Marsh system using emergent water runoff -a combination of storm this system must be Irregular shaped
aquatic wetland vegetation control, runoff water runoff control, planned for periodic permanent pool
as its principal pollutant pollution removal, sedimentation and pollution removal of sediments and Plant emergent aquatic
removal system and sedimentation control are needed - and debris from the deepest wetland vegetation
control where the discharge water part of the basin native to the area, if
must be of high quality possible

PURPOSE - APPICABLE PLANNING- DESIGN
lIMP . DEFINITION~~~~~~~ "CONSDEATO CRITERIA

Artificial An artificial freshwater To provide May be used in large areas Estimate approximately If the wetland is used
Freshwater Wetland shallow:marsh designed to biofiltration of with gentle slopes that 150 square feet of for storm water
treat storm water runoff and pollutants carried by promote sheet runoff and/or wetland for every 10,000 detention, the
reduce sedimentation storm water runoff low velocity flow to the square feet of temporary increase in
prior to release to wetland contributing developed : water depth during a
receiving waters area 100 year storm should
Depth to ground water not exceed I"
should be determined to Use vegetation adapted
decide if a liner is to :: :t the area and climate
needed to avoid ground
water contamination

Infiltration Dry A dry pond system for site To temporarily store May be used in areas where The seasonal high Drainage Area: From
Pond with permeable soils that storm water runoff storm water runoff control groundwater table should 5 to 50 acres
(Basin) promote infiltration of and maintain on-site and' treatment are needed, as be at least 3' below the Depth: From 3' to 12'
temporarily stored storm groundwater by well as maintenance of the bottom of the basin The basin must be a
water runoff infiltration through groundwater levels Soils must be suitable for minimum of 50' from
the bottom and sides basinconstructionand any slope greater than
of the basin infiltration 15% IY
Basin must be a
minimum of 100'
upslope and 20'
downslope of any
building

amp DEFINITION PURPOSEA IABE CONSIDRATIO CRITERIA

Dry Extended An open pond system that. To temporarily store May be used on large Generally, the completed Requires a minimum
Detention Pond temporarily stores excess excess storm water development sites where pond should be planned of 40 hours detention
runoff from the site prior to runoff from a site water quality treatment and to provide safety for time for settling of
gradual release after the before gradual flood control are needed people, protection of urban pollutants and
peak of storm water inflow release into a property, improved sediment from a 2
has passed receiving water storm water runoff year, 24 hour storm
body; provides control and provide Pond depth and
removal of wildlife habitats geometry same as for a
Figure 16:: : - sediments through wet pond
settling

Grass Filter Strip A grassed surface area Used to remove May be used to protect To be effective, the Grade should be
designed to accept overland sediment, organic surface infiltration trenches depth of storm water uniform, even, with a
sheet flow materials, and trace from clogging with during treatment should relatively low slope
metals from storm sediment, parking lot not exceed the height of A shallow stone trench
water runoff perimeters, on sides of the grass along the top of the
roadways, etc. :Runoff should be a . grassed filter strip may
uniform sheet flow serves as a level
spreader
Infiltration Trench I A shallow, excavated trench To provide control May be used for residential If infiltration is desired, Drainage Area: 5 to 10
back-filled with stone to of storm water lots, commercial areas, soils and depth to the acres
form an underground runoff, preserve on- parking lots, and open areas ground water table must Trench Depth: 3' to 8'
reservoir toinfiltrate storm site ground water be suitable Stone fill material shall
water runoff into the subsoil and remove consist of washed
or drain into pipes and be sediments and aggregate 1.5" to 3" in
diverted to a suitable : pollutants diameter
collection point

Schematic Of a Dry Extendied Detention Pond

'rap View

Top Stage ~ ~ ~ Lar~ag

Low Flow Chafnnhi
\ \ ~~Central

Side View
la Year Water Surface Elevation

Figure 16. Dry Extended Detention Pond

Source: Sctiuslor. 1987.

WHERE . PLANNING DE~~~SIGN
'' f w.,',' ........... L .....~~~~~~~~~~~~~::'''''':''':'l'i~i"~.~.ii :jl0l~iii'iiir:li:i i D
.: ~ ~ ~ I)FNTO P::OS . CRITE:RI:A: : 7*:::* : : : *::: C;v* :S z::

InfiltrationTrench s imilar to Infiltration To provide storm May beused for parking Slottedcurbs maybe Same as for Infiltration
11 ::In X Trench I; designed to water runoff control lots or other large areas of used to function as level Trench I
intercept sheet flow from and water quality impervious surface : spreaders: A 20' gra filterstrip
parking lots; a grass filter improvement of : should be maintained
strip separates the trench sheet flow from between the trench and
from the paved surface ; parking lots the paved surface

Dry Well A small infiltration system To intercept and May be used where disposal This system may only be Design criteria is the
designed to infiltrate runoff infiltrate runoff of runoff via infiltration can used in areas where there same as for infiltration
from roof downspouts from roof occur onsite and where is not significant Trenches
downspouts I hook-up to a storm water or depositional air pollution Te dry well should be
sanitary system is not : Regular maintenance and no less than 10' from
possible : cleaning is required for the building foundation
design operation

Porous Pavement Porous paving material - To provide water May be used in parking : Porous pavement must- Should be designed to
designed toallow the quality improvement areas, low-volume roads, becarefullymaintained drain the runoff from-a
infiltration of storm water of storm water and emergency parking to avoid clogging from 6 month, 24 hour
while removing the soluble : runoff and ground lanes where grade and spills and dust storm within 48 hours
and fine particulate water recharge subsoil will allow on-site
pollutants :: : infiltration

-;0-;-:i -:BM- 0 X-iP.:.fi�-- X rW ig 0AlllFtli:.�~~~ I S -: ION I ERI

Concrete Grid and Paving material consisting To improve storm May be used in parking The following items Installation is based on
Modular Pavement of strong structural material water runoff water lots, airport runway should be considered: the manufacturer's
with regular, interspersed quality, reduce shoulders, emergency soil permeability, slope, recommendations
void areas filled with runoff rates, reduce parking lanes, on-street intended use of the area, Parking areas should
pervious material (sod, off-site pollution, parking aprons, driveways, types of pollutants avoid ponding for
grass, gravel, sand, etc.) and provide ground patios, and walkways generated, depth to periods exceeding
water recharge ground water, pre- and more than 2 hours
post-development runoff
volumes, and surface
drainage conditions
Fertilizer/Pesticide Proper use of fertilizers and To reduce nutrient Developed and developing Developments adjacent to Fertilizers and
Control pesticides to avoid water loading and toxic sites sensitive water bodies pesticides should be
quality impacts chemical loading of should provide lawn care stored in sheds and
storm water runoff services, and carefully away from water
monitor and time sources (streams,
applications to avoid lakes, etc.) and
polluted runoff entering pervious soil
receiving waters

PRINTED JANUARY 1995

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