[Federal Register Volume 61, Number 89 (Tuesday, May 7, 1996)]
[Rules and Regulations]
[Pages 20473-20490]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-11209]



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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 355

[Docket 300 PQ-R2; FRL-5468-5]
RIN 2050-AD50


Extremely Hazardous Substances

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: Today, EPA is implementing one of its regulatory reform 
commitments set forth in its June 1, 1995, Report to the President. EPA 
is taking final action on two proposed rules that modify the extremely 
hazardous substances (EHS) list and reportable quantities under section 
302 of the Emergency Planning and Community Right-to-Know Act of 1986

[[Page 20474]]

(EPCRA), Title III of the Superfund Amendments and Reauthorization Act 
of 1986. EPA is raising the statutory reportable quantities (RQs) for 
202 EHSs. EPA is also removing four chemicals that do not meet the 
listing criteria from the EHS list. Through these actions, the Agency 
is reducing the burden of reporting for facilities presently required 
to report certain releases unnecessarily. Protection of human health 
and the environment is maintained while better focusing attention on 
releases that may require a response by state and/or local authorities.

EFFECTIVE DATE: July 8, 1996.

ADDRESSES:
    Docket: Copies of materials relevant to this rulemaking are 
contained in the U.S. Environmental Protection Agency CERCLA Docket 
Office, Crystal Gateway #1, 1st Floor, 1235 Jefferson Davis Highway, 
Arlington, VA 22202 [Docket Number 300 PQ-R2]. The docket is available 
for inspection between the hours of 9 a.m. and 4 p.m., Monday through 
Friday, excluding Federal holidays. Appointments to review the docket 
can be made by calling 703/603-9232. The public may copy a maximum of 
266 pages from any regulatory docket at no cost. If the number of pages 
copied exceeds 266, however, an administrative fee of $25 and a charge 
of $0.15 per page for each page after page 266 will be incurred. The 
docket will mail copies of materials to requestors who are outside of 
the Washington, DC metropolitan area.

FOR FURTHER INFORMATION CONTACT: The RCRA/UST, Superfund, and EPCRA 
Hotline at 800/424-9346 (in the Washington, DC metropolitan area, 
contact 703/486-3323). The Telecommunications Device for the Deaf (TDD) 
Hotline number is 800/553-7672 (in the Washington, DC metropolitan 
area, contact 703/412-9810); or John Ferris, Chemical Engineer, 
Chemical Emergency Preparedness and Prevention Office (5101), U.S. 
Environmental Protection Agency, 401 M Street S.W., Washington, DC 
20460, or at (202) 260-4043.

SUPPLEMENTARY INFORMATION:
    Regulated entities. Regulated categories and entities include:

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               Category                        Regulated entities       
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Industry..............................  All facilities handling         
                                         chemicals on the extremely     
                                         hazardous substances list may  
                                         be subject to this regulation. 
Federal Government....................  Executive Order 12856 requires  
                                         all federal agencies to comply 
                                         with sections 302 and 304 of   
                                         EPCRA.                         
State and Local Governments...........  State emergency response        
                                         commissions and local emergency
                                         planning committees receive the
                                         information provided under     
                                         EPCRA section 304. State/local 
                                         government facilities handling 
                                         chemicals on the extremely     
                                         hazardous substances list may  
                                         be subject to this regulation. 
------------------------------------------------------------------------

    This table is not intended to be exhaustive, but rather provide a 
guide for readers regarding entities likely to be regulated by this 
action. To determine whether your facility is regulated by this action, 
you should carefully examine the applicability criteria in section 
355.40 of title 40 of the Code of Federal Regulations. If you have 
questions regarding the applicability of this action to a particular 
entity, consult the person listed in the preceding FOR FURTHER 
INFORMATION CONTACT section.
    Contents: The contents of today's preamble are listed in the 
following outline:

I. Introduction
    a. Statutory Authority
    b. Background
    c. Today's Rulemaking
II. RQ Adjustment Methodology
    a. TPQ methodology
    b. CERCLA RQ methodology
    c. Proposed methodology
    d. Alternative chosen
III. Response to Comments on the August 30, 1989 Proposal
    a. Reportable Quantities and Threshold Planning Quantities
    b. Sulfur Dioxide
    c. Hydrogen Chloride/Hydrochloric Acid
    d. Sulfur Trioxide
IV. Listing Corrections
V. Response to Comments on the October 12, 1994 Proposal
VI. Regulatory Analysis
    a. Executive Order 12866
    b. Regulatory Flexibility Act
    c. Paperwork Reduction Act
    d. Unfunded Mandates

I. Introduction

a. Statutory Authority

    This regulation is issued under sections 302, 304 and 328 of the 
Emergency Planning and Community Right-to-Know Act (EPCRA).

b. Background

    On October 17, 1986, the President signed into law the Superfund 
Amendments and Reauthorization Act of 1986 (SARA), Pub. L. 99-499 
(1986). Title III of SARA, the Emergency Planning and Community Right-
to-Know Act of 1986 (EPCRA), established a program designed to 
encourage state and local planning and preparedness for spills or 
releases of extremely hazardous substances and to provide the public 
and local governments with information concerning chemical releases and 
the potential chemical risks in their communities.
    Subtitle A of the Act establishes the framework for local emergency 
planning. Under section 302, a facility which has present an extremely 
hazardous substance (EHS) in excess of its threshold planning quantity 
(TPQ) must notify its state emergency response commission (SERC) and 
participate, as necessary, with the local emergency planning committee 
(LEPC) in the local emergency planning process.
    Section 302 directed EPA to publish the list of extremely hazardous 
substances as an interim final rule within 30 days of the enactment of 
EPCRA. Section 302(a)(2) required that the list be identical to the 
list compiled by EPA in 1985 as part of EPA's Chemical Emergency 
Preparedness Program. Under section 302(a)(4), EPA is authorized to 
revise the list, but in undertaking any such revision, EPA must take 
into account the ``toxicity, reactivity, volatility, dispersibility, 
combustibility, or flammability of a substance.'' The term ``toxicity'' 
is defined to include ``any short- or long-term health effects which 
may result from a short-term exposure to the substance.''
    EPA published the list of 402 extremely hazardous substances on 
November 17, 1986 (51 FR 41570). On the same day, EPA proposed the 
deletion of 40 substances from the EHS list on the basis that their 
original listing was in error. On April 22, 1987, 52 FR 13388, EPA 
announced that it was deferring the proposed delisting of these 
substances, pending an evaluation of the long-term effects from short-
term exposure to each of them. This deferral was in response to 
comments from members of the public who argued that the proposed rule 
was premature. On November 23, 1987, the District Court for the 
District of Columbia in A.L. Laboratories, Inc. v. Environmental 
Protection Agency issued an order requiring EPA to remove several 
substances from the EHS list, reasoning that Congress did not intend to 
include in the statutorily designated list substances listed due to 
``clerical error.''

[[Page 20475]]

It is on the basis of this ruling that EPA proposed on October 12, 1994 
(59 FR 51816), the removal of four chemicals.
    Section 304 of EPCRA establishes requirements for immediate 
reporting of certain releases of EHSs and hazardous substances (HSs) 
listed under the Comprehensive Environmental Response, Compensation, 
and Liability Act (CERCLA) to SERCs and LEPCs, similar to the release 
reporting provisions of CERCLA section 103. Although similar, CERCLA 
section 103 and EPCRA section 304 differ somewhat in purpose. CERCLA 
provides generally for federal planning and coordination of entities 
and for federal contingency plans. CERCLA section 103 requires federal 
notification for any release of a hazardous substance in an amount 
equal to or in excess of its RQ. EPCRA is designed to protect the 
public in the event of dangerous chemical releases through the 
establishment of local and state emergency response capability. EPCRA 
section 304 requires, in addition to any federal notification, 
notification to state and local authorities for any release of an EHS 
in an amount equal to or in excess of its RQ. The potential hazards 
posed by EHSs make state and local notification critical to effective 
and timely emergency response. EHSs are acutely toxic chemicals which 
cause both severe sort- and long-term health effects after a single, 
brief exposure. In many cases, local and state authorities may be the 
first and only responders to the release of an EHS.
    Notifications are required if a release of an EHS or HS is equal to 
or above the reportable quantity (RQ). Section 304(a) of EPCRA provides 
that chemicals on the EHS list which do not have an RQ assigned to them 
by regulation, will have a reportable quantity of 1 pound. Currently, 
204 EHSs have the statutory one-pound RQ. On August 30, 1989 (54 FR 
35988), EPA proposed to modify the statutory RQs for 232 EHSs using a 
proposed modification of the CERCLA RQ methodology.

c. Today's Rulemaking

    EPA is today taking final action on the two proposed rules 
published in the Federal Register on August 30, 1989 and October 12, 
1994. As discussed below, EPA is not yet taking final action on some 
aspects of the proposed rules. EPA is adjusting the reportable 
quantities of 204 extremely hazardous substances.\1\ This rule will 
make the reportable quantities for these chemicals the same as their 
threshold planning quantities. EPA is also finalizing the proposal to 
remove phosphorus pentoxide, diethylcarbamazine citrate, fenitrothion 
and tellurium from the EHS list.
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    \1\ Although a total of 215 EHSs have one-pound statutory RQs, 
this rule is adjusting the RQs of 204 of these EHSs. The remaining 
11 EHSs with one-pound statutory RQs were designated CERCLA 
hazardous substances in a February 9, 1995 final rule (60 FR 7824); 
the Agency is currently developing a rulemaking to adjust the CERCLA 
and EPCRA one-pound RQs for these 11 substances. The substances are 
identified in 40 CFR Part 355 by the footnote ``d.''
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    On August 30, 1989, EPA proposed the adjustment of the TPQ for 
isophorone diisocyanate. Today's rule reflects the current TPQ for 
isophorone diisocyanate. However, an adjusted TPQ and RQ will be 
published in a future notice.

II. RQ Adjustment Methodologies

a. TPQ Methodology

    EPA's methodology for establishing threshold planning quantities 
for EHSs under EPCRA consists of initially determining the minimum 
short term exposure concentration in air that would lead to serious 
irreversible health effects in the general population when exposed to 
the substance for relatively short duration. This is the so-called 
``level of concern.'' (See the Threshold Planning Quantities Technical 
Support Document, April 7, 1987.)
    There are two ways to determine a ``level of concern.'' If it is 
available for a chemical, EPA may use one-tenth of the Immediately 
Dangerous to Life and Health (IDLH) level established by the National 
Institute for Occupational Safety and Health (NIOSH). The IDLH is the 
maximum concentration of a substance in air to which a healthy worker 
can be exposed for 30 minutes and escape without suffering irreversible 
health effects or impairing symptoms. If the IDLH value is not 
available, as is the case for most of the EHSs, EPA determines an IDLH 
equivalent value using available toxicity data with an adjustment 
factor.
    The level of concern is then divided by a factor ``V'' which 
represents the extent to which the material can volatilize and become 
airborne and dispersed. This approach is explained in the November 17, 
1986 Federal Register notice (51 FR 41580). Dividing the level of 
concern by ``V'' provides the index value for an EHS.
    The final threshold planning quantity is then determined by a 
relative ranking of the index values for all of the chemicals on the 
EHS list. The index values and their corresponding threshold planning 
quantities are found in the Threshold Planning Quantity Technical 
Support Document. This approach is generally based on the quantity of 
the chemical which when released will generate the level of concern at 
a distance of 100 meters.

b. CERCLA RQ Methodology

    The CERCLA RQ methodology uses a two step process to determine the 
possibility of harm from the release of a hazardous substance. The 
methodology begins with an evaluation of six intrinsic physical, 
chemical, and toxicological properties associated with each hazardous 
substance. These properties are known as the ``primary criteria.'' Each 
substance is evaluated according to the applicable ``primary 
criteria,'' and an RQ value is determined for each applicable 
criterion. The ``primary criteria'' RQ for each hazardous substance is 
the lowest value of all the applicable criteria. For example, if the 
Agency evaluates hazardous substance A under the RQ adjustment 
methodology, identifies both aquatic toxicity and mammalian toxicity 
data on the substance, and sets a tentative RQ of 100 pounds on the 
basis of aquatic toxicity and 1000 pounds on the basis of mammalian 
toxicity, the 100 pound value will be the applicable ``primary 
criteria'' RQ. Upon completion of the evaluation of the ``primary 
criteria'' RQ, secondary adjustment criteria based on the natural 
degradation processes of BHP (biodegradation, hydrolysis, and 
photolysis) are assessed. If a hazardous substance, when released into 
the environment, degrades (within 5 days) to a less hazardous form by 
one or more of the BHP processes, its primary criteria RQ is raised one 
level; if the substance degrades to a more hazardous form, its RQ may 
be lowered.

c. Proposed Methodology

    For approximately 60 of the 232 chemicals proposed for adjustment 
on August 30, 1989, the CERCLA methodology adjusted RQs that were too 
high for purposes of emergency notification under EPCRA. The reportable 
quantities under the CERCLA methodology in these cases are higher than 
the substances' EPCRA threshold planning quantity. To rectify this 
discrepancy, the August 30, 1989, notice proposed to modify the CERCLA 
RQ methodology by integrating the TPQ into the CERCLA RQ methodology. 
As proposed, after the two-step CERCLA RQ process had been applied to 
the chemicals, an additional step of comparing the tentative RQ to the 
substances' TPQs was applied. If the TPQ was lower than the tentative 
RQ, the RQ would be adjusted to the TPQ level or lower.

[[Page 20476]]

d. Alternative Chosen

    In the proposed rule of August 30, 1989, the Agency was seeking 
comment on the various alternatives that could be used to set the 
reportable quantities. At the time the RQ adjustments were proposed, 
the Agency anticipated that the EHSs would be designated CERCLA 
hazardous substances as proposed on January 23, 1989 (54 FR 3388). The 
Agency, however is not finalizing at this time the proposal to 
designate these chemicals as CERCLA hazardous substances. Today's rule 
does not affect any CERCLA hazardous substances. Therefore, the Agency 
is not utilizing or modifying the CERCLA RQ methodology at this time. 
Instead, the Agency has decided to adjust the 1 pound EHS RQs to the 
same level as their respective TPQs.2
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    \2\ The release of EHSs which are already CERCLA hazardous 
substances is reportable at the RQ levels applicable under CERCLA. 
(EPCRA section 304 (a)(1)).
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    The Agency believes that it is appropriate to rely on the TPQ 
methodology rather than the CERCLA methodology to adjust EHS RQs for 
several reasons.
    First, reporting of EHS releases is required because EHSs are 
acutely toxic and will potentially pose an immediate hazard upon 
release. Thus, EHS RQs should be adjusted based on substances' 
potential for immediate effects. The TPQ methodology, designed 
specifically for the EHSs, is based on such effects, utilizing a 
``level of concern'' based upon short-term exposure concentrations that 
could lead to serious irreversible health effects.
    Second, use of the CERCLA secondary criteria of BHP is 
inappropriate for adjusting EHS RQs. The BHP analysis is used to 
increase a substance's RQ by taking into account its natural chemical 
degradation. EHSs can cause severe health effects after only a single, 
brief exposure which may occur prior to any chemical degradation. The 
BHP analysis and higher RQs based on chemical degradation are not 
suitable in this context.
    Third, as with RQs, the Agency adjusts TPQs based on the 
possibility of harm from the release of a specific substance. In the 
Threshold Planning Quantity Technical Support Document to the proposed 
rule of November 17, 1986 (51 FR 41570) to adjust TPQs, EPA stated that 
the TPQ should represent a quantity that could cause serious health 
consequences if an accident were to occur with that quantity. 
Consistent with this statement, EPA modelled a variety of release 
scenarios to generate the relative ranking of each EHS and to determine 
the six TPQ quantities (1, 10, 100, 500, 1,000, and 10,000 pounds). 
Since the TPQ methodology is based on the possibility of harm from 
release, the Agency believes that it is appropriate to rely on it to 
adjust RQs as well.
    Finally, like CERCLA RQs, EPCRA RQs do not reflect a determination 
that a release of a substance will always be hazardous at the RQ level 
and never hazardous below that level. EPA has not attempted to make 
such a determination because the actual hazard will vary with the 
unique circumstances of the release. For this reason, EPA encourages 
SERCs and LEPCs to consider the RQ during their emergency planning 
process involving facilities with extremely hazardous substances.

III. Response to Comments on August 30, 1989 Proposal

    Many of the comments received in response to the Federal Register 
notice of August 30, 1989, are not addressed today because they 
concerned the designation of EHSs as CERCLA hazardous substances and 
the adjustment of RQs for those substances under CERCLA. As stated 
above, the Agency is not taking action on modifying the CERCLA RQ 
methodology or listing EHSs as CERCLA hazardous substances at this 
time. For a complete list of comments and the Agency's responses, see 
the responses to comments document in the Docket of this Federal 
Register notice.

a. Threshold Planning Quantity Methodology

    The Agency received several comments on its proposed use of the TPQ 
methodology to adjust RQs. These commenters believed that the use of 
the TPQ methodology was inappropriate because the RQ and the TPQ 
address different regulatory requirements.
    EPA believes that the TPQ methodology is appropriate for these 
chemicals. Although the RQs and TPQs trigger two distinct notification 
requirements, both quantities are adjusted based on the possibility of 
harm from the release of a specific substance. Thus, even though TPQ 
(EPCRA Sec. 302) notification is not triggered by an actual release, 
the TPQ is based upon the potential harm from an actual release. In 
addition, the particular concern with EHSs is that they will 
potentially pose an immediate hazard upon release. Notification 
requirements should be based on the potential for these immediate 
effects, and the TPQ methodology (developed specifically for the EHS 
list) is in fact based upon the potential for immediate effects. For 
these reasons, the Agency believes that the use of the TPQ methodology 
is appropriate to set RQs for extremely hazardous substances. However, 
because these chemicals are not being added to the CERCLA hazardous 
substance list, modification of the CERCLA RQ methodology is not 
warranted at this time.

b. Sulfur Dioxide

    The adjusted RQ for sulfur dioxide was proposed at 100-pounds. 
Several commenters from the petroleum industry commented that the 100-
pound RQ is too low and would require needless and excessive reporting 
for the petroleum sector. In the petroleum sector, sulfur dioxide is a 
combustion product created when hydrogen sulfide from crude oil and 
natural gas is flared. The commenters referenced the Federal Clean Air 
Act New Source Performance Standards that they state allow coal fired 
power plants to emit 200,000 pounds per day of sulfur dioxide.
    The proposed RQ for sulfur dioxide was set at 100-pounds based on 
the proposed modified CERCLA RQ methodology. In the final rule of April 
22, 1987 (52 FR 13378), the TPQ for sulfur dioxide was adjusted to 500-
pounds. Because there is no 500-pound CERCLA RQ level, the sulfur 
dioxide RQ was proposed at 100-pounds. As stated earlier in this rule, 
EPA is not modifying the CERCLA RQ methodology at this time, but is 
adjusting RQs to the TPQ level. The final EPCRA RQ for sulfur dioxide 
is 500-pounds.
    EPA does not agree that the existence of a 200,000 pounds per day 
standard for one sector means that the EPCRA RQ should be set at a 
higher RQ level. Sulfur dioxide is used in many industries other than 
the petroleum sector, for example, sulfuric acid production, water 
purification and the pulp and paper industry. While flares and stacks 
are designed to lift the sulfur dioxide into the atmosphere, ground 
level releases of sulfur dioxide, including releases from containers 
storing sulfur dioxide may be more hazardous to the community. Since 
EPA sets one RQ to incorporate all probable release scenarios, EPA 
believes that the 500 pound RQ based on the substance's IDLH value 
provides an appropriate level.
    EPA notes that the release reporting requirements of EPCRA section 
304 work in conjunction with the federally permitted release exemption 
under CERCLA section 101(10) and the continuous release reporting 
requirements under CERCLA section 103. Releases that are federally 
permitted and those that are continuous

[[Page 20477]]

have reduced reporting requirements under EPCRA section 304.

c. Hydrogen Chloride

    Several commenters correctly pointed out that the phrase ``gas 
only'' was omitted from the hydrogen chloride listing in the tables 
proposing to revise Appendices A and B to 40 CFR part 355. In today's 
rule, this omission is corrected.
    In the final rule published in the Federal Register December 27, 
1989 (54 FR 53057), EPA raised the reportable quantity for Hydrogen 
chloride (gas only) to 5,000 pounds. This is the same as the reportable 
quantity for hydrogen chloride (a synonym of hydrochloric acid) under 
CERCLA section 103.

d. Sulfur Trioxide

    Several commenters believed that a reportable quantity for sulfur 
trioxide above 100 pounds is warranted. EPA, however, disagrees. The 
100 pound TPQ for sulfur Trioxide is based upon acute toxicity. EPA 
agrees that some releases of sulfur trioxide above 100-pounds may not 
be hazardous based upon the conditions of the release (e.g. from a 
flare or stack). However, 100-pound releases of sulfur trioxide at 
ground level (e.g. releases during sulfuric acid and explosive 
manufacturing) may pose a hazard to the community. An RQ incorporates 
all probable release scenarios so that persons off-site can determine 
the level of response necessary. Therefore, the Agency believes that 
the 100-pound RQ for sulfur trioxide based upon its acute toxicity is 
appropriate.

IV. Listing Corrections

    EPA is making final a rule that was originally proposed on October 
30, 1994, to remove phosphorus pentoxide, diethylcarbamizine citrate, 
finitrothion and tellurium from the extremely hazardous substances 
list.3
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    \3\  On October 30, 1994, EPA proposed the adjustment of the TPQ 
for isophorone diisocyanate. The final rule on this adjustment will 
be published in a future notice.
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    Substances are listed as EHSs based on toxicity criteria. 
Substances are screened using acute animal toxicity data for the most 
sensitive mammalian species and are placed on the list if they meet one 
of the following criteria:

 LC50 4  0.5 mg/L
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    \4\ ``LC50'' refers to that concentration of a substance in 
the air that is expected to cause the death of 50 percent of a 
defined experimental population.
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 Dermal LD50 5  50 mg/kg
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    \5\ ``LD50'' refers to that dose of a substance expected to 
cause the death of 50 percent of a defined experimental population.
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 Oral LD50  25 mg/kg

    If LC50 or LD50 data are not available, then LCLO or 
LDLO data are used. Substances that meet one of these criteria 
have the potential for causing harm if accidently released and are, 
therefore, designated as EHSs.
    EPA listed phosphorus pentoxide based on information presented in 
an abstract. This source reported an LC50 of 0.061 mg/L for guinea 
pigs and an LC50 of 0.271 mg/L for mice exposed for 1 hour to 
smoke generated from burning red phosphorus. A significant limitation 
of this study is that the toxic effects cannot be directly related to 
phosphorus pentoxide. Therefore, these data are insufficient for 
listing phosphorus pentoxide as an EHS. In addition, the Elemental 
Phosphorus Ad Hoc Solid Waste Group submitted a study that indicated 
that the LC50 for rats exposed to phosphorus pentoxide for 4 hours 
is greater than 0.99 mg/L, well above the .5 mg/L listing criteria. 
Based on the insufficient information in the original study and the 
information of the more recent study, EPA has decided to remove 
phosphorus pentoxide from the EHS list.
    EPA listed diethylcarbamazine citrate based on information 
presented in a Russian data compilation that listed an LC50 for 
rats equal to 0.309 mg/L for a 4-hour exposure. Review of this 
information indicated that the toxicity values presented were 
unverifiable because the study details were not available. In addition, 
SmithKline Beecham submitted a study that reported no deaths of rats 
from exposure to either 1.63 mg/L or 2.38 mg/L for 1 hour. Based on the 
poor quality of the original study and the additional information 
received, EPA has decided to remove diethylcarbamazine citrate from the 
EHS list.
    EPA listed fenitrothion based on a study that reported an LC50 
equal to 0.378 mg/L for a 4-hour exposure. EPA's review of this study 
concluded that a toxic impurity had resulted in an erroneously low 
value for the LC50. In addition, a surfactant was present that 
altered the permeability of the skin and cell membranes of the test 
animals, making them more susceptible to fenitrothion's toxic effect. 
Information submitted by Sumitomo Chemical America, Inc., reported an 
LC50 greater than 2.210 mg/L. Based on the Agency's review and the 
additional information, fenitrothion is being deleted from the EHS 
list.
    EPA listed tellurium metal based on a study that reported an oral 
LD50 of 20 mg/kg. Review of this study indicted that sodium 
tellurate, which is listed as an EHS, was used in the study rather than 
tellurium metal. The Selenium Tellurium Development Association also 
submitted a study that reported an LD50 greater than 5000 mg/kg 
for tellurium metal. Based on this information, EPA is deleting 
tellurium from the list of EHSs.

V. Response to Comments on October 12, 1994, Proposal

    EPA received one comment from the Clean Water Fund of North 
Carolina objecting to the removal of phosphorus pentoxide from the EHS 
list. The Clean Water Fund questions the validity of an unpublished 
1987 toxicity study showing no toxic effects in exposed animals, at 
levels up to .99 mg/L of phosphorus pentoxide aerosol. That study 
however, did not determine the level of the chemical in question in the 
chamber atmosphere. The analytical method determined only total 
phosphorus, which was then converted to an equivalent concentration of 
phosphorus pentoxide in air. The Clean Water Fund argues, therefore, 
that the pentoxide should remain on the list because the 1980 and 1982 
combustion experiments established that the pentoxide was a major 
component of the smoke and ``because the analytical techniques employed 
by the 1980 study may have actually synthesized the pentoxide from 
other (possibly less dangerous) phosphorus compounds actually present 
in the test chamber.'' The Agency assumes Clean Water Fund believes 
that because the pentoxide could have been synthesized from less toxic 
compounds, the pentoxide presented the toxic character of the test 
chamber gas.
    EPA disagrees. The 1980 and 1982 studies show that, in burning the 
phosphorus, there is a potential for the production of several oxides 
of phosphorus. Regardless of how pentoxide was formed (as noted by the 
Clean Water Fund) or whether the various oxide compounds are more or 
less toxic, the fact still remains that the studies did not distinguish 
which of the various oxides caused the high toxicity of the smoke. 
While the 1987 study showed no toxicity of phosphorus pentoxide, it 
also is not conclusive because it did not indicate a direct measurement 
of phosphorus pentoxide in the chamber and the pentoxide could have 
hydrolyzed to possibly less toxic constituents. On balance, none of the 
studies presented show that phosphorus pentoxide meets the toxicity 
criteria. Accordingly, EPA is removing the chemical from the EHS list.

[[Page 20478]]

VI. Regulatory Analyses

a. Executive Order 12866

    Under Executive Order 12866, (58 FR 51,735) of October 4, 1993, the 
Agency must determine whether the regulatory action is ``significant'' 
and therefore subject to review by the Office of Management and Budget 
(OMB) and the requirements of the Executive Order. The Order defines 
``significant regulatory action'' as one that is likely to result in a 
rule that may:
    (1) Have an annual effect on the economy of $100 million or more or 
adversely affect in a material way the economy, a sector of the 
economy, productivity, competition, jobs, the environment, public 
health or safety, or State, local or tribal governments or communities;
    (2) Create a serious inconsistency or otherwise interfere with an 
action taken or planned by another agency;
    (3) Materially alter the budgetary impact of entitlements, grants, 
user fees, or loan programs or the rights and obligations of recipients 
thereof; or
    (4) Raise novel legal or policy issues arising out of legal 
mandates, the President's priorities, or the principles set forth in 
the Executive Order.
    It has been determined that this rule is not a ``significant 
regulatory action'' under the terms of Executive Order 12866 and is 
therefore not subject to OMB review.

b. Regulatory Flexibility Analysis

    Pursuant to the Regulatory Flexibility Act, 5 U.S.C. 601 et seq., 
whenever an agency is required to publish a notice of rulemaking for 
any proposed or final rule, it must prepare and make available for 
public comment a regulatory flexibility analysis that describes the 
effect of the rule on small entities (i.e., small businesses, small 
organizations, and small governmental jurisdictions). This analysis is 
unnecessary, however, if the agency's administrator certifies that the 
rule will not have a significant economic effect on a substantial 
number of small entities.
    EPA has examined this rule's potential effects on small entities as 
required by the Regulatory Flexibility Act. It has determined that 
today's final rule will not have a significant economic effect on a 
substantial number of small entities. The overall economic effect of 
this regulation has been determined to equate to 6,249 hours of burden 
reduction (with no added burden) at a total cost saving of $355,628 per 
year to all regulated entities. Therefore, this regulation will have a 
cost savings, and not have a significant impact on small businesses.

c. Paperwork Reduction Act

    The information collection requirements contained in this final 
rule have been approved by OMB under the provisions of the Paperwork 
Reduction Act, 44 U.S.C. 3501 et seq., and have been assigned OMB 
control number 2050-0092 (EPA Information Collection Request No. 
1395.2). Copies of the information collection requests may be obtained 
from Sandy Farmer, OPPE Regulatory Information Division, U.S. 
Environmental Protection Agency (2136), 401 M Street, SW., Washington, 
DC 20460 or by calling (202) 260-2740.
    As indicated in the Section I Introduction, the mandatory reporting 
requirements under EPCRA section 304 serve as a trigger for informing 
state and local governments of a release, so that state and local 
personnel can evaluate the need for any necessary action in a timely 
fashion. EPCRA section 304 also requires the submittal of a written 
follow-up notice to the same state and local entities.
    The public reporting burden for the collection of information 
pursuant to EPCRA section 304 is estimated to take, on average, 5 hours 
per response. This estimate includes the time required to make the call 
and to develop the written follow-up notice.
    Because the RQs for almost all of the substances included in 
today's rule are to be raised, the net reporting and recordkeeping 
burden associated with reporting releases of these substances under 
EPCRA section 304 is expected to decrease. As demonstrated in an 
economic impact analysis (EIA), the Agency estimates that the total 
burden reduction for notification to SERCs and LEPCs, and notification 
to 911 services in transportation-related incidents, and the completion 
of follow up reports will equate to 6,249 hours at a total cost savings 
of $355,628 per year.
    Send comments on the ICR to the Director, OPPE Regulatory 
Information Division, U.S. Environmental Protection Agency (2136), 401 
M Street, SW., Washington, DC 20460; and to the Office of Information 
and Regulatory Affairs, Office of Management and Budget, 725 17th 
Street, NW., Washington, DC 20503, marked ``Attention: Desk Officer for 
EPA.'' Include ICR number 1395.2 in any correspondence.

d. Unfunded Mandates Reform Act

    Title II of the Unfunded Mandates Reform Act of 1995 (UMRA), Public 
Law 104-4, establishes requirements for Federal agencies to assess the 
effects of their regulatory actions on State, local, and tribal 
governments and the private sector. Under section 202 of the UMRA, EPA 
generally must prepare a written statement, including a cost-benefit 
analysis, for proposed and final rules with ``Federal mandates'' that 
may result in expenditures to State, local, and tribal governments, in 
the aggregate, or to the private sector, of $100 million or more in any 
one year. Before promulgating an EPA rule for which a written statement 
is needed, section 205 of the UMRA generally requires EPA to identify 
and consider a reasonable number of regulatory alternatives and adopt 
the least costly, most cost-effective or least burdensome alternative 
that achieves the objectives of the rule. The provisions of section 205 
do not apply when they are inconsistent with applicable law. Moreover, 
section 205 allows EPA to adopt an alternative other than the least 
costly, most cost-effective or least burdensome alternative if the 
Administrator publishes with the final rule an explanation why that 
alternative was not adopted. Before EPA establishes any regulatory 
requirements that may significantly or uniquely affect small 
governments, including tribal governments, it must have developed under 
section 203 of the UMRA a small government agency plan. The plan must 
provide for notifying potentially affected small governments, enabling 
officials of affected small governments to have meaningful and timely 
input in the development of EPA regulatory proposals with significant 
Federal intergovernmental mandates, and informing, educating, and 
advising small governments on compliance with the regulatory 
requirements.
    EPA has determined that this rule does not contain a Federal 
mandate that may result in expenditures of $100 million or more for 
State, local, and tribal governments, in the aggregate, or the private 
sector in any one year. Because the RQs for almost all of the 
substances included in today's rule are to be raised, the net reporting 
and recordkeeping burden associated with reporting releases of these 
substances under EPCRA section 304 is expected to decrease. As 
demonstrated in an economic impact analysis (EIA), the Agency estimates 
that the total burden reduction for notification to SERCs and LEPCs, 
and notification to 911 services in transportation-related incidents, 
and the completion of follow up reports will equate to 6,249 hours at a 
total cost savings of $355,628 per year. Thus, today's rule is not 
subject to the requirements of sections 202 and 205 of the UMRA.
    EPA has determined that this rule contains no regulatory 
requirements that might significantly or uniquely affect

[[Page 20479]]

small governments. Because the RQs for almost all of the substances 
included in today's rule are to be raised, the net reporting and 
recordkeeping burden associated with reporting releases of these 
substances under EPCRA section 304 is expected to decrease. Small 
governments will no longer receive notifications and written follow-up 
reports from facilities that have releases of extremely hazardous 
substances less that the substances' TPQ.

List of Subjects in 40 CFR Part 355

    Air pollution control, Chemical accident prevention, Chemical 
emergency preparedness, Chemicals, Community emergency response plan, 
Community right-to-know, Contingency planning, Disaster assistance, 
Emergency Planning and Community Right-to-Know Act, Extremely hazardous 
substances, Hazardous substances, Intergovernmental relations, Natural 
resources, Penalties, Reportable quantity, Reporting and recordkeeping 
requirements, Superfund Amendments and Reauthorization Act, Threshold 
planning quantity, Water pollution control, Water supply.

    Dated: April 29, 1996.
Carol M. Browner,
Administrator.
    For the reasons set out in the preamble, title 40, Chapter I of the 
Code of Federal Regulations is amended as follows:

PART 355--EMERGENCY PLANNING AND NOTIFICATION

    1. The authority citation for part 355 continues to read as 
follows:

    Authority: 42 U.S.C. 11002, 11004, and 11048.

    2. Appendices A and B in Part 355 are revised to read as follows:

   Appendix A to Part 355--The List of Extremely Hazardous Substances and Their Threshold Planning Quantities   
                                              [Alphabetical Order]                                              
----------------------------------------------------------------------------------------------------------------
                                                              Reportable quantity *  Threshold planning quantity
   CAS No.           Chemical name               Notes              (pounds)                   (pounds)         
----------------------------------------------------------------------------------------------------------------
75-86-5.....  Acetone Cyanohydrin........  ................  10                      1,000                      
1752-30-3...  Acetone Thiosemicarbazide..  ................  1,000                   1,000/10,000               
107-02-8....  Acrolein...................  ................  1                       500                        
79-06-1.....  Acrylamide.................  l                 5,000                   1,000/10,000               
107-13-1....  Acrylonitrile..............  l                 100                     10,000                     
814-68-6....  Acrylyl Chloride...........  h                 100                     100                        
111-69-3....  Adiponitrile...............  l                 1,000                   1,000                      
116-06-3....  Aldicarb...................  c                 1                       100/10,000                 
309-00-2....  Aldrin.....................  ................  1                       500/10,000                 
107-18-6....  Allyl Alcohol..............  ................  100                     1,000                      
107-11-9....  Allylamine.................  ................  500                     500                        
20859-73-8..  Aluminum Phosphide.........  b                 100                     500                        
54-62-6.....  Aminopterin................  ................  500                     500/10,000                 
78-53-5.....  Amiton.....................  ................  500                     500                        
3734-97-2...  Amiton Oxalate.............  ................  100                     100/10,000                 
7664-41-7...  Ammonia....................  l                 100                     500                        
300-62-9....  Amphetamine................  ................  1,000                   1,000                      
62-53-3.....  Aniline....................  l                 5,000                   1,000                      
88-05-1.....  Aniline, 2,4,6-Trimethyl-..  ................  500                     500                        
7783-70-2...  Antimony Pentafluoride.....  ................  500                     500                        
1397-94-0...  Antimycin A................  c                 1,000                   1,000/10,000               
86-88-4.....  ANTU.......................  ................  100                     500/10,000                 
1303-28-2...  Arsenic Pentoxide..........  ................  1                       100/10,000                 
1327-53-3...  Arsenous Oxide.............  h                 1                       100/10,000                 
7784-34-1...  Arsenous Trichloride.......  ................  1                       500                        
7784-42-1...  Arsine.....................  ................  100                     100                        
2642-71-9...  Azinphos-Ethyl.............  ................  100                     100/10,000                 
86-50-0.....  Azinphos-Methyl............  ................  1                       10/10,000                  
98-87-3.....  Benzal Chloride............  ................  5,000                   500                        
98-16-8.....  Benzenamine, 3-              ................  500                     500                        
               (Trifluoromethyl)-.                                                                              
100-14-1....  Benzene, 1-(Chloromethyl)-4- ................  500                     500/10,000                 
               Nitro-.                                                                                          
98-05-5.....  Benzenearsonic Acid........  ................  10                      10/10,000                  
3615-21-2...  Benzimidazole, 4,5-Dichloro- g                 500                     500/10,000                 
               2-(Trifluoromethyl)-.                                                                            
98-07-7.....  Benzotrichloride...........  ................  10                      100                        
100-44-7....  Benzyl Chloride............  ................  100                     500                        
140-29-4....  Benzyl Cyanide.............  h                 500                     500                        
15271-41-7..  Bicyclo[2.2.1]Heptane-2-     ................  500                     500/10,000                 
               Carbonitrile, 5-Chloro-6-                                                                        
               ((((Methylamino)Carbonyl)O                                                                       
               xy)Imino)-, (1s-(1-alpha,2-                                                                      
               beta,4-alpha,5-alpha,6E))-.                                                                      
534-07-6....  Bis(Chloromethyl) Ketone...  ................  10                      10/10,000                  
4044-65-9...  Bitoscanate................  ................  500                     500/10,000                 
10294-34-5..  Boron Trichloride..........  ................  500                     500                        
7637-07-2...  Boron Trifluoride..........  ................  500                     500                        
353-42-4....  Boron Trifluoride Compound   ................  1,000                   1,000                      
               With Methyl Ether (1:1).                                                                         
28772-56-7..  Bromadiolone...............  ................  100                     100/10,000                 
7726-95-6...  Bromine....................  l                 500                     500                        
1306-19-0...  Cadmium Oxide..............  ................  100                     100/10,000                 
2223-93-0...  Cadmium Stearate...........  c                 1,000                   1,000/10,000               
7778-44-1...  Calcium Arsenate...........  ................  1                       500/10,000                 

[[Page 20480]]

                                                                                                                
8001-35-2...  Camphechlor................  ................  1                       500/10,000                 
56-25-7.....  Cantharidin................  ................  100                     100/10,000                 
51-83-2.....  Carbachol Chloride.........  ................  500                     500/10,000                 
26419-73-8..  Carbamic Acid, Methyl-, O-   d                 1                       100/10,000                 
               (((2,4-Dimethyl-1, 3-                                                                            
               Dithiolan-2-                                                                                     
               yl)Methylene)Amino)-.                                                                            
1563-66-2...  Carbofuran.................  ................  10                      10/10,000                  
75-15-0.....  Carbon Disulfide...........  l                 100                     10,000                     
786-19-6....  Carbophenothion............  ................  500                     500                        
57-74-9.....  Chlordane..................  ................  1                       1,000                      
470-90-6....  Chlorfenvinfos.............  ................  500                     500                        
7782-50-5...  Chlorine...................  ................  10                      100                        
24934-91-6..  Chlormephos................  ................  500                     500                        
999-81-5....  Chlormequat Chloride.......  h                 100                     100/10,000                 
79-11-8.....  Chloroacetic Acid..........  ................  100                     100/10,000                 
107-07-3....  Chloroethanol..............  ................  500                     500                        
627-11-2....  Chloroethyl Chloroformate..  ................  1,000                   1,000                      
67-66-3.....  Chloroform.................  l                 10                      10,000                     
542-88-1....  Chloromethyl Ether.........  h                 10                      100                        
107-30-2....  Chloromethyl Methyl Ether..  c                 10                      100                        
3691-35-8...  Chlorophacinone............  ................  100                     100/10,000                 
1982-47-4...  Chloroxuron................  ................  500                     500/10,000                 
21923-23-9..  Chlorthiophos..............  h                 500                     500                        
10025-73-7..  Chromic Chloride...........  ................  1                       1/10,000                   
62207-76-5..  Cobalt, ((2,2'-(1,2-         ................  100                     100/10,000                 
               Ethanediylbis                                                                                    
               (Nitrilomethylidyne))                                                                            
               Bis(6-Fluorophenolato))(2-                                                                       
               )-N,N',O,O')-.                                                                                   
10210-68-1..  Cobalt Carbonyl............  h                 10                      10/10,000                  
64-86-8.....  Colchicine.................  h                 10                      10/10,000                  
56-72-4.....  Coumaphos..................  ................  10                      100/10,000                 
5836-29-3...  Coumatetralyl..............  ................  500                     500/10,000                 
95-48-7.....  Cresol, o-.................  ................  100                     1,000/10,000               
535-89-7....  Crimidine..................  ................  100                     100/10,000                 
4170-30-3...  Crotonaldehyde.............  ................  100                     1,000                      
123-73-9....  Crotonaldehyde, (E)-.......  ................  100                     1,000                      
506-68-3....  Cyanogen Bromide...........  ................  1,000                   500/10,000                 
506-78-5....  Cyanogen Iodide............  ................  1,000                   1,000/10,000               
2636-26-2...  Cyanophos..................  ................  1,000                   1,000                      
675-14-9....  Cyanuric Fluoride..........  ................  100                     100                        
66-81-9.....  Cycloheximide..............  ................  100                     100/10,000                 
108-91-8....  Cyclohexylamine............  l                 10,000                  10,000                     
17702-41-9..  Decaborane(14).............  ................  500                     500/10,000                 
8065-48-3...  Demeton....................  ................  500                     500                        
919-86-8....  Demeton-S-Methyl...........  ................  500                     500                        
10311-84-9..  Dialifor...................  ................  100                     100/10,000                 
19287-45-7..  Diborane...................  ................  100                     100                        
111-44-4....  Dichloroethyl ether........  ................  10                      10,000                     
149-74-6....  Dichloromethylphenylsilane.  ................  1,000                   1,000                      
62-73-7.....  Dichlorvos.................  ................  10                      1,000                      
141-66-2....  Dicrotophos................  ................  100                     100                        
1464-53-5...  Diepoxybutane..............  ................  10                      500                        
814-49-3....  Diethyl Chlorophosphate....  h                 500                     500                        
71-63-6.....  Digitoxin..................  c                 100                     100/10,000                 
2238-07-5...  Diglycidyl Ether...........  ................  1,000                   1,000                      
20830-75-5..  Digoxin....................  h                 10                      10/10,000                  
115-26-4....  Dimefox....................  ................  500                     500                        
60-51-5.....  Dimethoate.................  ................  10                      500/10,000                 
2524-03-0...  Dimethyl                     ................  500                     500                        
               Phosphorochloridothioate.                                                                        
77-78-1.....  Dimethyl sulfate...........  ................  100                     500                        
75-78-5.....  Dimethyldichlorosilane.....  h                 500                     500                        
57-14-7.....  Dimethylhydrazine..........  ................  10                      1,000                      
99-98-9.....  Dimethyl-p-Phenylenediamine  ................  10                      10/10,000                  
644-64-4....  Dimetilan..................  d                 1                       500/10,000                 
534-52-1....  Dinitrocresol..............  ................  10                      10/10,000                  
88-85-7.....  Dinoseb....................  ................  1,000                   100/10,000                 
1420-07-1...  Dinoterb...................  ................  500                     500/10,000                 
78-34-2.....  Dioxathion.................  ................  500                     500                        
82-66-6.....  Diphacinone................  ................  10                      10/10,000                  
152-16-9....  Diphosphoramide, Octamethyl- ................  100                     100                        
               .                                                                                                
298-04-4....  Disulfoton.................  ................  1                       500                        
514-73-8....  Dithiazanine Iodide........  ................  500                     500/10,000                 

[[Page 20481]]

                                                                                                                
541-53-7....  Dithiobiuret...............  ................  100                     100/10,000                 
316-42-7....  Emetine, Dihydrochloride...  h                 1                       1/10,000                   
115-29-7....  Endosulfan.................  ................  1                       10/10,000                  
2778-04-3...  Endothion..................  ................  500                     500/10,000                 
72-20-8.....  Endrin.....................  ................  1                       500/10,000                 
106-89-8....  Epichlorohydrin............  l                 100                     1,000                      
2104-64-5...  EPN........................  ................  100                     100/10,000                 
50-14-6.....  Ergocalciferol.............  c                 1,000                   1,000/10,000               
379-79-3....  Ergotamine Tartrate........  ................  500                     500/10,000                 
1622-32-8...  Ethanesulfonyl Chloride, 2-  ................  500                     500                        
               Chloro-.                                                                                         
10140-87-1..  Ethanol, 1,2-Dichloro-,      ................  1,000                   1,000                      
               Acetate.                                                                                         
563-12-2....  Ethion.....................  ................  10                      1,000                      
13194-48-4..  Ethoprophos................  ................  1,000                   1,000                      
538-07-8....  Ethylbis(2-                  h                 500                     500                        
               Chloroethyl)Amine.                                                                               
371-62-0....  Ethylene Fluorohydrin......  c, h              10                      10                         
75-21-8.....  Ethylene Oxide.............  l                 10                      1,000                      
107-15-3....  Ethylenediamine............  ................  5,000                   10,000                     
151-56-4....  Ethyleneimine..............  ................  1                       500                        
542-90-5....  Ethylthiocyanate...........  ................  10,000                  10,000                     
22224-92-6..  Fenamiphos.................  ................  10                      10/10,000                  
115-90-2....  Fensulfothion..............  h                 500                     500                        
4301-50-2...  Fluenetil..................  ................  100                     100/10,000                 
7782-41-4...  Fluorine...................  k                 10                      500                        
640-19-7....  Fluoroacetamide............  j                 100                     100/10,000                 
144-49-0....  Fluoroacetic Acid..........  ................  10                      10/10,000                  
359-06-8....  Fluoroacetyl Chloride......  c                 10                      10                         
51-21-8.....  Fluorouracil...............  ................  500                     500/10,000                 
944-22-9....  Fonofos....................  ................  500                     500                        
50-00-0.....  Formaldehyde...............  l                 100                     500                        
107-16-4....  Formaldehyde Cyanohydrin...  h                 1,000                   1,000                      
23422-53-9..  Formetanate Hydrochloride..  d, h              1                       500/10,000                 
2540-82-1...  Formothion.................  ................  100                     100                        
17702-57-7..  Formparanate...............  d                 1                       100/10,000                 
21548-32-3..  Fosthietan.................  ................  500                     500                        
3878-19-1...  Fuberidazole...............  ................  100                     100/10,000                 
110-00-9....  Furan......................  ................  100                     500                        
13450-90-3..  Gallium Trichloride........  ................  500                     500/10,000                 
77-47-4.....  Hexachlorocyclopentadiene..  h                 10                      100                        
4835-11-4...  Hexamethylenediamine, N,N'-  ................  500                     500                        
               Dibutyl-.                                                                                        
302-01-2....  Hydrazine..................  ................  1                       1,000                      
74-90-8.....  Hydrocyanic Acid...........  ................  10                      100                        
7647-01-0...  Hydrogen Chloride (gas       l                 5,000                   500                        
               only).                                                                                           
7664-39-3...  Hydrogen Fluoride..........  ................  100                     100                        
7722-84-1...  Hydrogen Peroxide (Conc >    l                 1,000                   1,000                      
               52%).                                                                                            
7783-07-5...  Hydrogen Selenide..........  ................  10                      10                         
7783-06-4...  Hydrogen Sulfide...........  l                 100                     500                        
123-31-9....  Hydroquinone...............  l                 100                     500/10,000                 
13463-40-6..  Iron, Pentacarbonyl-.......  ................  100                     100                        
297-78-9....  Isobenzan..................  ................  100                     100/10,000                 
78-82-0.....  Isobutyronitrile...........  h                 1,000                   1,000                      
102-36-3....  Isocyanic Acid, 3,4-         ................  500                     500/10,000                 
               Dichlorophenyl Ester.                                                                            
465-73-6....  Isodrin....................  ................  1                       100/10,000                 
55-91-4.....  Isofluorphate..............  c                 100                     100                        
4098-71-9...  Isophorone Diisocyanate....  ................  100                     100                        
108-23-6....  Isopropyl Chloroformate....  ................  1,000                   1,000                      
119-38-0....  Isopropylmethylpyrazolyl     d                 1                       500                        
               Dimethylcarbamate.                                                                               
78-97-7.....  Lactonitrile...............  ................  1,000                   1,000                      
21609-90-5..  Leptophos..................  ................  500                     500/10,000                 
541-25-3....  Lewisite...................  c, h              10                      10                         
58-89-9.....  Lindane....................  ................  1                       1,000/10,000               
7580-67-8...  Lithium Hydride............  b                 100                     100                        
109-77-3....  Malononitrile..............  ................  1,000                   500/10,000                 
12108-13-3..  Manganese, Tricarbonyl       h                 100                     100                        
               Methylcyclopentadienyl.                                                                          
51-75-2.....  Mechlorethamine............  c                 10                      10                         
950-10-7....  Mephosfolan................  ................  500                     500                        
1600-27-7...  Mercuric Acetate...........  ................  500                     500/10,000                 
7487-94-7...  Mercuric Chloride..........  ................  500                     500/10,000                 
21908-53-2..  Mercuric Oxide.............  ................  500                     500/10,000                 

[[Page 20482]]

                                                                                                                
10476-95-6..  Methacrolein Diacetate.....  ................  1,000                   1,000                      
760-93-0....  Methacrylic Anhydride......  ................  500                     500                        
126-98-7....  Methacrylonitrile..........  h                 1,000                   500                        
920-46-7....  Methacryloyl Chloride......  ................  100                     100                        
30674-80-7..  Methacryloyloxyethyl         h                 100                     100                        
               Isocyanate.                                                                                      
10265-92-6..  Methamidophos..............  ................  100                     100/10,000                 
558-25-8....  Methanesulfonyl Fluoride...  ................  1,000                   1,000                      
950-37-8....  Methidathion...............  ................  500                     500/10,000                 
2032-65-7...  Methiocarb.................  ................  10                      500/10,000                 
16752-77-5..  Methomyl...................  h                 100                     500/10,000                 
151-38-2....  Methoxyethylmercuric         ................  500                     500/10,000                 
               Acetate.                                                                                         
80-63-7.....  Methyl 2-Chloroacrylate....  ................  500                     500                        
74-83-9.....  Methyl Bromide.............  l                 1,000                   1,000                      
79-22-1.....  Methyl Chloroformate.......  h                 1,000                   500                        
60-34-4.....  Methyl Hydrazine...........  ................  10                      500                        
624-83-9....  Methyl Isocyanate..........  ................  10                      500                        
556-61-6....  Methyl Isothiocyanate......  b                 500                     500                        
74-93-1.....  Methyl Mercaptan...........  l                 100                     500                        
3735-23-7...  Methyl Phenkapton..........  ................  500                     500                        
676-97-1....  Methyl Phosphonic            b                 100                     100                        
               Dichloride.                                                                                      
556-64-9....  Methyl Thiocyanate.........  ................  10,000                  10,000                     
78-94-4.....  Methyl Vinyl Ketone........  ................  10                      10                         
502-39-6....  Methylmercuric Dicyanamide.  ................  500                     500/10,000                 
75-79-6.....  Methyltrichlorosilane......  h                 500                     500                        
1129-41-5...  Metolcarb..................  d                 1                       100/10,000                 
7786-34-7...  Mevinphos..................  ................  10                      500                        
315-18-4....  Mexacarbate................  ................  1,000                   500/10,000                 
50-07-7.....  Mitomycin C................  ................  10                      500/10,000                 
6923-22-4...  Monocrotophos..............  ................  10                      10/10,000                  
2763-96-4...  Muscimol...................  ................  1,000                   500/10,000                 
505-60-2....  Mustard Gas................  h                 500                     500                        
13463-39-3..  Nickel Carbonyl............  ................  10                      1                          
54-11-5.....  Nicotine...................  c                 100                     100                        
65-30-5.....  Nicotine Sulfate...........  ................  100                     100/10,000                 
7697-37-2...  Nitric Acid................  ................  1,000                   1,000                      
10102-43-9..  Nitric Oxide...............  c                 10                      100                        
98-95-3.....  Nitrobenzene...............  l                 1,000                   10,000                     
1122-60-7...  Nitrocyclohexane...........  ................  500                     500                        
10102-44-0..  Nitrogen Dioxide...........  ................  10                      100                        
62-75-9.....  Nitrosodimethylamine.......  h                 10                      1,000                      
991-42-4....  Norbormide.................  ................  100                     100/10,000                 
0...........  Organorhodium Complex (PMN-  ................  10                      10/10,000                  
               82-147).                                                                                         
630-60-4....  Ouabain....................  c                 100                     100/10,000                 
23135-22-0..  Oxamyl.....................  d                 1                       100/10,000                 
78-71-7.....  Oxetane, 3,3-                ................  500                     500                        
               Bis(Chloromethyl)-.                                                                              
2497-07-6...  Oxydisulfoton..............  h                 500                     500                        
10028-15-6..  Ozone......................  ................  100                     100                        
1910-42-5...  Paraquat Dichloride........  ................  10                      10/10,000                  
2074-50-2...  Paraquat Methosulfate......  ................  10                      10/10,000                  
56-38-2.....  Parathion..................  c                 10                      100                        
298-00-0....  Parathion-Methyl...........  c                 100                     100/10,000                 
12002-03-8..  Paris Green................  ................  1                       500/10,000                 
19624-22-7..  Pentaborane................  ................  500                     500                        
2570-26-5...  Pentadecylamine............  ................  100                     100/10,000                 
79-21-0.....  Peracetic Acid.............  ................  500                     500                        
594-42-3....  Perchloromethylmercaptan...  ................  100                     500                        
108-95-2....  Phenol.....................  ................  1,000                   500/10,000                 
4418-66-0...  Phenol, 2,2'-Thiobis(4-      ................  100                     100/10,000                 
               Chloro-6-Methyl)-.                                                                               
64-00-6.....  Phenol, 3-(1-Methylethyl)-,  d                 1                       500/10,000                 
               Methylcarbamate.                                                                                 
58-36-6.....  Phenoxarsine, 10,10'-Oxydi-  ................  500                     500/10,000                 
696-28-6....  Phenyl Dichloroarsine......  h                 1                       500                        
59-88-1.....  Phenylhydrazine              ................  1,000                   1,000/10,000               
               Hydrochloride.                                                                                   
62-38-4.....  Phenylmercury Acetate......  ................  100                     500/10,000                 
2097-19-0...  Phenylsilatrane............  h                 100                     100/10,000                 
103-85-5....  Phenylthiourea.............  ................  100                     100/10,000                 
298-02-2....  Phorate....................  ................  10                      10                         
4104-14-7...  Phosacetim.................  ................  100                     100/10,000                 
947-02-4....  Phosfolan..................  ................  100                     100/10,000                 

[[Page 20483]]

                                                                                                                
75-44-5.....  Phosgene...................  l                 10                      10                         
732-11-6....  Phosmet....................  ................  10                      10/10,000                  
13171-21-6..  Phosphamidon...............  ................  100                     100                        
7803-51-2...  Phosphine..................  ................  100                     500                        
2703-13-1...  Phosphonothioic Acid,        ................  500                     500                        
               Methyl-, O-Ethyl O-(4-                                                                           
               (Methylthio) Phenyl) Ester.                                                                      
50782-69-9..  Phosphonothioic Acid,        ................  100                     100                        
               Methyl-, S-(2-(Bis(1-                                                                            
               Methylethyl)Amino)Ethyl) O-                                                                      
               Ethyl Ester.                                                                                     
2665-30-7...  Phosphonothioic Acid,        ................  500                     500                        
               Methyl-, O-(4-Nitrophenyl)                                                                       
               O-Phenyl Ester.                                                                                  
3254-63-5...  Phosphoric Acid, Dimethyl 4- ................  500                     500                        
               (Methylthio)Phenyl Ester.                                                                        
2587-90-8...  Phosphorothioic Acid, O,O-   c, g              500                     500                        
               Dimethyl-S-(2-Methylthio)                                                                        
               Ethyl Ester.                                                                                     
7723-14-0...  Phosphorus.................  b, h              1                       100                        
10025-87-3..  Phosphorus Oxychloride.....  ................  1,000                   500                        
10026-13-8..  Phosphorus Pentachloride...  b                 500                     500                        
7719-12-2...  Phosphorus Trichloride.....  ................  1,000                   1,000                      
57-47-6.....  Physostigmine..............  d                 1                       100/10,000                 
57-64-7.....  Physostigmine, Salicylate    d                 1                       100/10,000                 
               (1:1).                                                                                           
124-87-8....  Picrotoxin.................  ................  500                     500/10,000                 
110-89-4....  Piperidine.................  ................  1,000                   1,000                      
23505-41-1..  Pirimifos-Ethyl............  ................  1,000                   1,000                      
10124-50-2..  Potassium Arsenite.........  ................  1                       500/10,000                 
151-50-8....  Potassium Cyanide..........  b                 10                      100                        
506-61-6....  Potassium Silver Cyanide...  b                 1                       500                        
2631-37-0...  Promecarb..................  d, h              1                       500/10,000                 
106-96-7....  Propargyl Bromide..........  ................  10                      10                         
57-57-8.....  Propiolactone, Beta-.......  ................  10                      500                        
107-12-0....  Propionitrile..............  ................  10                      500                        
542-76-7....  Propionitrile, 3-Chloro-...  ................  1,000                   1,000                      
70-69-9.....  Propiophenone, 4-Amino-....  g                 100                     100/10,000                 
109-61-5....  Propyl Chloroformate.......  ................  500                     500                        
75-56-9.....  Propylene Oxide............  l                 100                     10,000                     
75-55-8.....  Propyleneimine.............  ................  1                       10,000                     
2275-18-5...  Prothoate..................  ................  100                     100/10,000                 
129-00-0....  Pyrene.....................  c                 5,000                   1,000/10,000               
140-76-1....  Pyridine, 2-Methyl-5-Vinyl-  ................  500                     500                        
504-24-5....  Pyridine, 4-Amino-.........  h                 1,000                   500/10,000                 
1124-33-0...  Pyridine, 4-Nitro-,l-Oxide.  ................  500                     500/10,000                 
53558-25-1..  Pyriminil..................  h                 100                     100/10,000                 
14167-18-1..  Salcomine..................  ................  500                     500/10,000                 
107-44-8....  Sarin......................  h                 10                      10                         
7783-00-8...  Selenious Acid.............  ................  10                      1,000/10,000               
7791-23-3...  Selenium Oxychloride.......  ................  500                     500                        
563-41-7....  Semicarbazide Hydrochloride  ................  1,000                   1,000/10,000               
3037-72-7...  Silane, (4-                  ................  1,000                   1,000                      
               Aminobutyl)Diethoxymethyl-.                                                                      
7631-89-2...  Sodium Arsenate............  ................  1                       1,000/10,000               
7784-46-5...  Sodium Arsenite............  ................  1                       500/10,000                 
26628-22-8..  Sodium Azide (Na(N3))......  b                 1,000                   500                        
124-65-2....  Sodium Cacodylate..........  ................  100                     100/10,000                 
143-33-9....  Sodium Cyanide (Na(CN))....  b                 10                      100                        
62-74-8.....  Sodium Fluoroacetate.......  ................  10                      10/10,000                  
13410-01-0..  Sodium Selenate............  ................  100                     100/10,000                 
10102-18-8..  Sodium Selenite............  h                 100                     100/10,000                 
10102-20-2..  Sodium Tellurite...........  ................  500                     500/10,000                 
900-95-8....  Stannane, Acetoxytriphenyl-  g                 500                     500/10,000                 
57-24-9.....  Strychnine.................  c                 10                      100/10,000                 
60-41-3.....  Strychnine Sulfate.........  ................  10                      100/10,000                 
3689-24-5...  Sulfotep...................  ................  100                     500                        
3569-57-1...  Sulfoxide, 3-Chloropropyl    ................  500                     500                        
               Octyl.                                                                                           
7446-09-5...  Sulfur Dioxide.............  1                 500                     500                        
7783-60-0...  Sulfur Tetrafluoride.......  ................  100                     100                        
7446-11-9...  Sulfur Trioxide............  b                 100                     100                        
7664-93-9...  Sulfuric Acid..............  ................  1,000                   1,000                      
77-81-6.....  Tabun......................  c, h              10                      10                         
7783-80-4...  Tellurium Hexafluoride.....  k                 100                     100                        
107-49-3....  TEPP.......................  ................  10                      100                        
13071-79-9..  Terbufos...................  h                 100                     100                        
78-00-2.....  Tetraethyllead.............  c                 10                      100                        
597-64-8....  Tetraethyltin..............  c                 100                     100                        
75-74-1.....  Tetramethyllead............  c, 1              100                     100                        
509-14-8....  Tetranitromethane..........  ................  10                      500                        

[[Page 20484]]

                                                                                                                
10031-59-1..  Thallium Sulfate...........  h                 100                     100/10,000                 
6533-73-9...  Thallous Carbonate.........  c, h              100                     100/10,000                 
7791-12-0...  Thallous Chloride..........  c, h              100                     100/10,000                 
2757-18-8...  Thallous Malonate..........  c, h              100                     100/10,000                 
7446-18-6...  Thallous Sulfate...........  ................  100                     100/10,000                 
2231-57-4...  Thiocarbazide..............  ................  1,000                   1,000/10,000               
39196-18-4..  Thiofanox..................  ................  100                     100/10,000                 
297-97-2....  Thionazin..................  ................  100                     500                        
108-98-5....  Thiophenol.................  ................  100                     500                        
79-19-6.....  Thiosemicarbazide..........  ................  100                     100/10,000                 
5344-82-1...  Thiourea, (2-Chlorophenyl)-  ................  100                     100/10,000                 
614-78-8....  Thiourea, (2-Methylphenyl)-  ................  500                     500/10,000                 
7550-45-0...  Titanium Tetrachloride.....  ................  1,000                   100                        
584-84-9....  Toluene 2,4-Diisocyanate...  ................  100                     500                        
91-08-7.....  Toluene 2,6-Diisocyanate...  ................  100                     100                        
110-57-6....  Trans-1,4-Dichlorobutene...  ................  500                     500                        
1031-47-6...  Triamiphos.................  ................  500                     500/10,000                 
24017-47-8..  Triazofos..................  ................  500                     500                        
76-02-8.....  Trichloroacetyl Chloride...  ................  500                     500                        
115-21-9....  Trichloroethylsilane.......  h                 500                     500                        
327-98-0....  Trichloronate..............  k                 500                     500                        
98-13-5.....  Trichlorophenylsilane......  h                 500                     500                        
1558-25-4...  Trichloro(Chloromethyl)Sila  ................  100                     100                        
               ne.                                                                                              
27137-85-5..  Trichloro(Dichlorophenyl)    ................  500                     500                        
               Silane.                                                                                          
998-30-1....  Triethoxysilane............  ................  500                     500                        
75-77-4.....  Trimethylchlorosilane......  ................  1,000                   1,000                      
824-11-3....  Trimethylolpropane           h                 100                     100/10,000                 
               Phosphite.                                                                                       
1066-45-1...  Trimethyltin Chloride......  ................  500                     500/10,000                 
639-58-7....  Triphenyltin Chloride......  ................  500                     500/10,000                 
555-77-1....  Tris(2-Chloroethyl)Amine...  h                 100                     100                        
2001-95-8...  Valinomycin................  c                 1,000                   1,000/10,000               
1314-62-1...  Vanadium Pentoxide.........  ................  1,000                   100/10,000                 
108-05-4....  Vinyl Acetate Monomer......  1                 5,000                   1,000                      
81-81-2.....  Warfarin...................  ................  100                     500/10,000                 
129-06-6....  Warfarin Sodium............  h                 100                     100/10,000                 
28347-13-9..  Xylylene Dichloride........  ................  100                     100/10,000                 
58270-08-9..  Zinc, Dichloro(4,4-          ................  100                     100/10,000                 
               Dimethyl-                                                                                        
               5((((Methylamino)Carbonyl)                                                                       
               Oxy)Imino)Pentanenitrile)-                                                                       
               , (T-4)-.                                                                                        
1314-84-7...  Zinc Phosphide.............  b                 100                     500                        
----------------------------------------------------------------------------------------------------------------
* Only the statutory or final RQ is shown. For more information, see 40 CFR Table 302.4.                        
Notes:                                                                                                          
a This chemical does not meet acute toxicity criteria. Its TPQ is set at 10,000 pounds.                         
b This material is a reactive solid. The TPQ does not default to 10,000 pounds for non-powder, non-molten,      
  nonsolution form.                                                                                             
c The calculated TPQ changed after technical review as described in the technical support document.             
d Indicates that the RQ is subject to change when the assessment of potential carcinogenicity and/or other      
  toxicity is completed.                                                                                        
e Statutory reportable quantity for purposes of notification under SARA sect 304(a)(2).                         
f [Reserved]                                                                                                    
g New chemicals added that were not part of the original list of 402 substances.                                
h Revised TPQ based on new or re-evaluated toxicity data.                                                       
j TPQ is revised to its calculated value and does not change due to technical review as in proposed rule.       
k The TPQ was revised after proposal due to calculation error.                                                  
l Chemicals on the original list that do not meet toxicity criteria but because of their high production volume 
  and recognized toxicity are considered chemicals of concern (``Other chemicals'').                            



   Appendix B to Part 355--The List of Extremely Hazardous Substances and Their Threshold Planning Quantities   
                                               [CAS Number Order]                                               
----------------------------------------------------------------------------------------------------------------
                                                              Reportable quantity *  Threshold planning quantity
   CAS No.           Chemical name               Notes              (pounds)                   (pounds)         
----------------------------------------------------------------------------------------------------------------
0...........  Organorhodium Complex (PMN-  ................  10                      10/10,000                  
               82-147).                                                                                         
50-00-0.....  Formaldehyde...............  l                 100                     500                        
50-07-7.....  Mitomycin C................  ................  10                      500/10,000                 
50-14-6.....  Ergocalciferol.............  c                 1,000                   1,000/10,000               
51-21-8.....  Fluorouracil...............  ................  500                     500/10,000                 
51-75-2.....  Mechlorethaminec...........  c                 10                      10                         

[[Page 20485]]

                                                                                                                
51-83-2.....  Carbachol Chloride.........  ................  500                     500/10,000                 
54-11-5.....  Nicotine...................  c                 100                     100                        
54-62-6.....  Aminopterin................  ................  500                     500/10,000                 
55-91-4.....  Isofluorphate..............  c                 100                     100                        
56-25-7.....  Cantharidin................  ................  100                     100/10,000                 
56-38-2.....  Parathion..................  c                 10                      100                        
56-72-4.....  Coumaphos..................  ................  10                      100/10,000                 
57-14-7.....  Dimethylhydrazine..........  ................  10                      1,000                      
57-24-9.....  Strychnine.................  c                 10                      100/10,000                 
57-47-6.....  Physostigmine..............  d                 1                       100/10,000                 
57-57-8.....  Propiolactone, Beta-.......  ................  10                      500                        
57-64-7.....  Physostigmine, Salicylate    d                 1                       100/10,000                 
               (1:1).                                                                                           
57-74-9.....  Chlordane..................  ................  1                       1,000                      
58-36-6.....  Phenoxarsine, 10,10'-Oxydi-  ................  500                     500/10,000                 
58-89-9.....  Lindane....................  ................  1                       1,000/10,000               
59-88-1.....  Phenylhydrazine              ................  1,000                   1,000/10,000               
               Hydrochloride.                                                                                   
60-34-4.....  Methyl Hydrazine...........  ................  10                      500                        
60-41-3.....  Strychnine sulfate.........  ................  10                      100/10,000                 
60-51-5.....  Dimethoate.................  ................  10                      500/10,000                 
62-38-4.....  Phenylmercury Acetate......  ................  100                     500/10,000                 
62-53-3.....  Aniline....................  l                 5,000                   1,000                      
62-73-7.....  Dichlorvos.................  ................  10                      1,000                      
62-74-8.....  Sodium Fluoroacetate.......  ................  10                      10/10,000                  
62-75-9.....  Nitrosodimethylamine.......  h                 10                      1,000                      
64-00-6.....  Phenol, 3-(1-Methylethyl)-,  d                 1                       500/10,000                 
               Methylcarbamate.                                                                                 
64-86-8.....  Colchicine.................  h                 10                      10/10,000                  
65-30-5.....  Nicotine sulfate...........  ................  100                     100/10,000                 
66-81-9.....  Cycloheximide..............  ................  100                     100/10,000                 
67-66-3.....  Chloroform.................  l                 10                      10,000                     
70-69-9.....  Propiophenone, 4-Amino-....  g                 100                     100/10,000                 
71-63-6.....  Digitoxin..................  c                 100                     100/10,000                 
72-20-8.....  Endrin.....................  ................  1                       500/10,000                 
74-83-9.....  Methyl Bromide.............  l                 1,000                   1,000                      
74-90-8.....  Hydrocyanic Acid...........  ................  10                      100                        
74-93-1.....  Methyl Mercaptan...........  l                 100                     500                        
75-15-0.....  Carbon Disulfide...........  l                 100                     10,000                     
75-21-8.....  Ethylene Oxide.............  l                 10                      1,000                      
75-44-5.....  Phosgene...................  l                 10                      10                         
75-55-8.....  Propyleneimine.............  ................  1                       10,000                     
75-56-9.....  Propylene Oxide............  l                 100                     10,000                     
75-74-1.....  Tetramethyllead............  c, l              100                     100                        
75-77-4.....  Trimethylchlorosilane......  ................  1,000                   1,000                      
75-78-5.....  Dimethyldichlorosilane.....  h                 500                     500                        
75-79-6.....  Methyltrichlorosilane......  h                 500                     500                        
75-86-5.....  Acetone Cyanohydrin........  ................  10                      1,000                      
76-02-8.....  Trichloroacetyl Chloride...  ................  500                     500                        
77-47-4.....  Hexachlorocyclopentadiene..  h                 10                      100                        
77-78-1.....  Dimethyl Sulfate...........  ................  100                     500                        
77-81-6.....  Tabun......................  c, h              10                      10                         
78-00-2.....  Tetraethyllead.............  c                 10                      100                        
78-34-2.....  Dioxathion.................  ................  500                     500                        
78-53-5.....  Amiton.....................  ................  500                     500                        
78-71-7.....  Oxetane, 3,3-                ................  500                     500                        
               Bis(Chloromethyl)-.                                                                              
78-82-0.....  Isobutyronitrile...........  h                 1,000                   1,000                      
78-94-4.....  Methyl Vinyl Ketone........  ................  10                      10                         
78-97-7.....  Lactonitrile...............  ................  1,000                   1,000                      
79-06-1.....  Acrylamide.................  l                 5,000                   1,000/10,000               
79-11-8.....  Chloroacetic Acid..........  ................  100                     100/10,000                 
79-19-6.....  Thiosemicarbazide..........  ................  100                     100/10,000                 
79-21-0.....  Peracetic Acid.............  ................  500                     500                        
79-22-1.....  Methyl Chloroformate.......  h                 1,000                   500                        
80-63-7.....  Methyl 2-Chloroacrylate....  ................  500                     500                        
81-81-2.....  Warfarin...................  ................  100                     500/10,000                 
82-66-6.....  Diphacinone................  ................  10                      10/10,000                  
86-50-0.....  Azinphos-Methyl............  ................  1                       10/10,000                  
86-88-4.....  ANTU.......................  ................  100                     500/10,000                 
88-05-1.....  Aniline, 2,4,6-Trimethyl-..  ................  500                     500                        
88-85-7.....  Dinoseb....................  ................  1,000                   100/10,000                 

[[Page 20486]]

                                                                                                                
91-08-7.....  Toluene 2,6-Diisocyanate...  ................  100                     100                        
95-48-7.....  Cresol, o-.................  ................  100                     1,000/10,000               
98-05-5.....  Benzenearsonic Acid........  ................  10                      10/10,000                  
98-07-7.....  Benzotrichloride...........  ................  10                      100                        
98-13-5.....  Trichlorophenylsilane......  h                 500                     500                        
98-16-8.....  Benzenamine, 3-              ................  500                     500                        
               (Trifluoromethyl)-.                                                                              
98-87-3.....  Benzal Chloride............  ................  5,000                   500                        
98-95-3.....  Nitrobenzene...............  l                 1,000                   10,000                     
99-98-9.....  Dimethyl-p-Phenylenediamine  ................  10                      10/10,000                  
100-14-1....  Benzene, 1-(Chloromethyl)-4- ................  500                     500/10,000                 
               Nitro-.                                                                                          
100-44-7....  Benzyl Chloride............  ................  100                     500                        
102-36-3....  Isocyanic Acid, 3,4-         ................  500                     500/10,000                 
               Dichlorophenyl Ester.                                                                            
103-85-5....  Phenylthiourea.............  ................  100                     100/10,000                 
106-89-8....  Epichlorohydrin............  l                 100                     1,000                      
106-96-7....  Propargyl Bromide..........  ................  10                      10                         
107-02-8....  Acrolein...................  ................  1                       500                        
107-07-3....  Chloroethanol..............  ................  500                     500                        
107-11-9....  Allylamine.................  ................  500                     500                        
107-12-0....  Propionitrile..............  ................  10                      500                        
107-13-1....  Acrylonitrile..............  l                 100                     10,000                     
107-15-3....  Ethylenediamine............  ................  5,000                   10,000                     
107-16-4....  Formaldehyde Cyanohydrin...  h                 1,000                   1,000                      
107-18-6....  Allyl Alcohol..............  ................  100                     1,000                      
107-30-2....  Chloromethyl Methyl Ether..  c                 10                      100                        
107-44-8....  Sarin......................  h                 10                      10                         
107-49-3....  TEPP.......................  ................  10                      100                        
108-05-4....  Vinyl Acetate Monomer......  l                 5,000                   1,000                      
108-23-6....  Isopropyl Chloroformate....  ................  1,000                   1,000                      
108-91-8....  Cyclohexylamine............  l                 10,000                  10,000                     
108-95-2....  Phenol.....................  ................  1,000                   500/10,000                 
108-98-5....  Thiophenol.................  ................  100                     500                        
109-61-5....  Propyl Chloroformate.......  ................  500                     500                        
109-77-3....  Malononitrile..............  ................  1,000                   500/10,000                 
110-00-9....  Furan......................  ................  100                     500                        
110-57-6....  Trans-1,4-Dichlorobutene...  ................  500                     500                        
110-89-4....  Piperidine.................  ................  1,000                   1,000                      
111-44-4....  Dichloroethyl Ether........  ................  10                      10,000                     
111-69-3....  Adiponitrile...............  l                 1,000                   1,000                      
115-21-9....  Trichloroethylsilane.......  h                 500                     500                        
115-26-4....  Dimefox....................  ................  500                     500                        
115-29-7....  Endosulfan.................  ................  1                       10/10,000                  
115-90-2....  Fensulfothion..............  h                 500                     500                        
116-06-3....  Aldicarb...................  c                 1                       100/10,000                 
119-38-0....  Isopropylmethylpyrazolyl     d                 1                       500                        
               Dimethylcarbamate.                                                                               
123-31-9....  Hydroquinone...............  l                 100                     500/10,000                 
123-73-9....  Crotonaldehyde, (E)-.......  ................  100                     1,000                      
124-65-2....  Sodium Cacodylate..........  ................  100                     100/10,000                 
124-87-8....  Picrotoxin.................  ................  500                     500/10,000                 
126-98-7....  Methacrylonitrile..........  h                 1,000                   500                        
129-00-0....  Pyrene.....................  c                 5,000                   1,000/10,000               
129-06-6....  Warfarin Sodium............  h                 100                     100/10,000                 
140-29-4....  Benzyl Cyanide.............  h                 500                     500                        
140-76-1....  Pyridine, 2-Methyl-5-Vinyl-  ................  500                     500                        
141-66-2....  Dicrotophos................  ................  100                     100                        
143-33-9....  Sodium Cyanide (Na(CN))....  b                 10                      100                        
144-49-0....  Fluoroacetic Acid..........  ................  10                      10/10,000                  
149-74-6....  Dichloromethylphenylsilane.  ................  1,000                   1,000                      
151-38-2....  Methoxyethylmercuric         ................  500                     500/10,000                 
               Acetate.                                                                                         
151-50-8....  Potassium Cyanide..........  b                 10                      100                        
151-56-4....  Ethyleneimine..............  ................  1                       500                        
152-16-9....  Diphosphoramide, Octamethyl- ................  100                     100                        
               .                                                                                                
297-78-9....  Isobenzan..................  ................  100                     100/10,000                 
297-97-2....  Thionazin..................  ................  100                     500                        
298-00-0....  Parathion-Methyl...........  c                 100                     100/10,000                 
298-02-2....  Phorate....................  ................  10                      10                         
298-04-4....  Disulfoton.................  ................  1                       500                        
300-62-9....  Amphetamine................  ................  1,000                   1,000                      
302-01-2....  Hydrazine..................  ................  1                       1,000                      

[[Page 20487]]

                                                                                                                
309-00-2....  Aldrin.....................  ................  1                       500/10,000                 
315-18-4....  Mexacarbate................  ................  1,000                   500/10,000                 
316-42-7....  Emetine, Dihydrochloride...  h                 1                       1/10,000                   
327-98-0....  Trichloronate..............  k                 500                     500                        
353-42-4....  Boron Trifluoride Compound   ................  1,000                   1,000                      
               With Methyl Ether (1:1).                                                                         
359-06-8....  Fluoroacetyl Chloride......  c                 10                      10                         
371-62-0....  Ethylene Fluorohydrin......  c, h              10                      10                         
379-79-3....  Ergotamine Tartrate........  ................  500                     500/10,000                 
465-73-6....  Isodrin....................  ................  1                       100/10,000                 
470-90-6....  Chlorfenvinfos.............  ................  500                     500                        
502-39-6....  Methylmercuric Dicyanamide.  ................  500                     500/10,000                 
504-24-5....  Pyridine, 4-Amino-.........  h                 1,000                   500/10,000                 
505-60-2....  Mustard Gas................  h                 500                     500                        
506-61-6....  Potassium Silver Cyanide...  b                 1                       500                        
506-68-3....  Cyanogen Bromide...........  ................  1,000                   500/10,000                 
506-78-5....  Cyanogen Iodide............  ................  1,000                   1,000/10,000               
509-14-8....  Tetranitromethane..........  ................  10                      500                        
514-73-8....  Dithiazanine Iodide........  ................  500                     500/10,000                 
534-07-6....  Bis(Chloromethyl) Ketone...  ................  10                      10/10,000                  
534-52-1....  Dinitrocresol..............  ................  10                      10/10,000                  
535-89-7....  Crimidine..................  ................  100                     100/10,000                 
538-07-8....  Ethylbis(2-                  h                 500                     500                        
               Chloroethyl)Amine.                                                                               
541-25-3....  Lewisite...................  c, h              10                      10                         
541-53-7....  Dithiobiuret...............  ................  100                     100/10,000                 
542-76-7....  Propionitrile, 3-Chloro-...  ................  1,000                   1,000                      
542-88-1....  Chloromethyl Ether.........  h                 10                      100                        
542-90-5....  Ethylthiocyanate...........  ................  10,000                  10,000                     
555-77-1....  Tris(2-Chloroethyl)Amine...  h                 100                     100                        
556-61-6....  Methyl Isothiocyanate......  b                 500                     500                        
556-64-9....  Methyl Thiocyanate.........  ................  10,000                  10,000                     
558-25-8....  Methanesulfonyl Fluoride...  ................  1,000                   1,000                      
563-12-2....  Ethion.....................  ................  10                      1,000                      
563-41-7....  Semicarbazide Hydrochloride  ................  1,000                   1,000/10,000               
584-84-9....  Toluene 2,4-Diisocyanate...  ................  100                     500                        
594-42-3....  Perchloromethylmercaptan...  ................  100                     500                        
597-64-8....  Tetraethyltin..............  c                 100                     100                        
614-78-8....  Thiourea, (2-Methylphenyl)-  ................  500                     500/10,000                 
624-83-9....  Methyl Isocyanate..........  ................  10                      500                        
627-11-2....  Chloroethyl Chloroformate..  ................  1,000                   1,000                      
630-60-4....  Ouabain....................  c                 100                     100/10,000                 
639-58-7....  Triphenyltin Chloride......  ................  500                     500/10,000                 
640-19-7....  Fluoroacetamide............  j                 100                     100/10,000                 
644-64-4....  Dimetilan..................  d                 1                       500/10,000                 
675-14-9....  Cyanuric Fluoride..........  ................  100                     100                        
676-97-1....  Methyl Phosphonic            b                 100                     100                        
               Dichloride.                                                                                      
696-28-6....  Phenyl Dichloroarsine......  h                 1                       500                        
732-11-6....  Phosmet....................  ................  10                      10/10,000                  
760-93-0....  Methacrylic Anhydride......  ................  500                     500                        
786-19-6....  Carbophenothion............  ................  500                     500                        
814-49-3....  Diethyl Chlorophosphate....  h                 500                     500                        
814-68-6....  Acrylyl Chloride...........  h                 100                     100                        
824-11-3....  Trimethylolpropane           h                 100                     100/10,000                 
               Phosphite.                                                                                       
900-95-8....  Stannane, Acetoxytriphenyl-  g                 500                     500/10,000                 
919-86-8....  Demeton-S-Methyl...........  ................  500                     500                        
920-46-7....  Methacryloyl Chloride......  ................  100                     100                        
944-22-9....  Fonofos....................  ................  500                     500                        
947-02-4....  Phosfolan..................  ................  100                     100/10,000                 
950-10-7....  Mephosfolan................  ................  500                     500                        
950-37-8....  Methidathion...............  ................  500                     500/10,000                 
991-42-4....  Norbormide.................  ................  100                     100/10,000                 
998-30-1....  Triethoxysilane............  ................  500                     500                        
999-81-5....  Chlormequat Chloride.......  h                 100                     100/10,000                 
1031-47-6...  Triamiphos.................  ................  500                     500/10,000                 
1066-45-1...  Trimethyltin Chloride......  ................  500                     500/10,000                 
1122-60-7...  Nitrocyclohexane...........  ................  500                     500                        
1124-33-0...  Pyridine, 4-Nitro-,1-Oxide.  ................  500                     500/10,000                 
1129-41-5...  Metolcarb..................  d                 1                       100/10,000                 
1303-28-2...  Arsenic Pentoxide..........  ................  1                       100/10,000                 

[[Page 20488]]

                                                                                                                
1306-19-0...  Cadmium Oxide..............  ................  100                     100/10,000                 
1314-62-1...  Vanadium Pentoxide.........  ................  1,000                   100/10,000                 
1314-84-7...  Zinc Phosphide.............  b                 100                     500                        
1327-53-3...  Arsenous Oxide.............  h                 1                       100/10,000                 
1397-94-0...  Antimycin A................  c                 1,000                   1,000/10,000               
1420-07-1...  Dinoterb...................  ................  500                     500/10,000                 
1464-53-5...  Diepoxybutane..............  ................  10                      500                        
1558-25-4...  Trichloro(Chloromethyl)Sila  ................  100                     100                        
               ne.                                                                                              
1563-66-2...  Carbofuran.................  ................  10                      10/10,000                  
1600-27-7...  Mercuric Acetate...........  ................  500                     500/10,000                 
1622-32-8...  Ethanesulfonyl Chloride, 2-  ................  500                     500                        
               Chloro-.                                                                                         
1752-30-3...  Acetone Thiosemicarbazide..  ................  1,000                   1,000/10,000               
1910-42-5...  Paraquat Dichloride........  ................  10                      10/10,000                  
1982-47-4...  Chloroxuron................  ................  500                     500/10,000                 
2001-95-8...  Valinomycin................  c                 1,000                   1,000/10,000               
2032-65-7...  Methiocarb.................  ................  10                      500/10,000                 
2074-50-2...  Paraquat Methosulfate......  ................  10                      10/10,000                  
2097-19-0...  Phenylsilatrane............  h                 100                     100/10,000                 
2104-64-5...  EPN........................  ................  100                     100/10,000                 
2223-93-0...  Cadmium Stearate...........  c                 1,000                   1,000/10,000               
2231-57-4...  Thiocarbazide..............  ................  1,000                   1,000/10,000               
2238-07-5...  Diglycidyl Ether...........  ................  1,000                   1,000                      
2275-18-5...  Prothoate..................  ................  100                     100/10,000                 
2497-07-6...  Oxydisulfoton..............  h                 500                     500                        
2524-03-0...  Dimethyl                     ................  500                     500                        
               Phosphorochloridothioate.                                                                        
2540-82-1...  Formothion.................  ................  100                     100                        
2570-26-5...  Pentadecylamine............  ................  100                     100/10,000                 
2587-90-8...  Phosphorothioic Acid, O,O-   c, g              500                     500                        
               Dimethyl-S-(2-Methylthio)                                                                        
               Ethyl Ester.                                                                                     
2631-37-0...  Promecarb..................  d, h              1                       500/10,000                 
2636-26-2...  Cyanophos..................  ................  1,000                   1,000                      
2642-71-9...  Azinphos-Ethyl.............  ................  100                     100/10,000                 
2665-30-7...  Phosphonothioic Acid,        ................  500                     500                        
               Methyl-, O-(4-Nitrophenyl)                                                                       
               O-Phenyl Ester.                                                                                  
2703-13-1...  Phosphonothioic Acid,        ................  500                     500                        
               Methyl-, O-Ethyl O-(4-                                                                           
               (Methylthio)Phenyl) Ester.                                                                       
2757-18-8...  Thallous Malonate..........  c, h              100                     100/10,000                 
2763-96-4...  Muscimol...................  ................  1,000                   500/10,000                 
2778-04-3...  Endothion..................  ................  500                     500/10,000                 
3037-72-7...  Silane, (4-                  ................  1,000                   1,000                      
               Aminobutyl)Diethoxymethyl-.                                                                      
3254-63-5...  Phosphoric Acid, Dimethyl 4- ................  500                     500                        
               (Methylthio)Phenyl Ester.                                                                        
3569-57-1...  Sulfoxide, 3-Chloropropyl    ................  500                     500                        
               Octyl.                                                                                           
3615-21-2...  Benzimidazole, 4,5-Dichloro- g                 500                     500/10,000                 
               2-(Trifluoromethyl)-.                                                                            
3689-24-5...  Sulfotep...................  ................  100                     500                        
3691-35-8...  Chlorophacinone............  ................  100                     100/10,000                 
3734-97-2...  Amiton Oxalate.............  ................  100                     100/10,000                 
3735-23-7...  Methyl Phenkapton..........  ................  500                     500                        
3878-19-1...  Fuberidazole...............  ................  100                     100/10,000                 
4044-65-9...  Bitoscanate................  ................  500                     500/10,000                 
4098-71-9...  Isophorone Diisocyanate....  ................  100                     100                        
4104-14-7...  Phosacetim.................  ................  100                     100/10,000                 
4170-30-3...  Crotonaldehyde.............  ................  100                     1,000                      
4301-50-2...  Fluenetil..................  ................  100                     100/10,000                 
4418-66-0...  Phenol, 2,2'-Thiobis(4-      ................  100                     100/10,000                 
               Chloro-6-Methyl)-.                                                                               
4835-11-4...  Hexamethylenediamine, N,N'-  ................  500                     500                        
               Dibutyl-.                                                                                        
5344-82-1...  Thiourea, (2-Chlorophenyl)-  ................  100                     100/10,000                 
5836-29-3...  Coumatetralyl..............  ................  500                     500/10,000                 
6533-73-9...  Thallous Carbonate.........  c, h              100                     100/10,000                 
6923-22-4...  Monocrotophos..............  ................  10                      10/10,000                  
7446-09-5...  Sulfur Dioxide.............  l                 500                     500                        
7446-11-9...  Sulfur Trioxide............  b                 100                     100                        
7446-18-6...  Thallous Sulfate...........  ................  100                     100/10,000                 
7487-94-7...  Mercuric Chloride..........  ................  500                     500/10,000                 
7550-45-0...  Titanium Tetrachloride.....  ................  1,000                   100                        
7580-67-8...  Lithium Hydride............  b                 100                     100                        
7631-89-2...  Sodium Arsenate............  ................  1                       1,000/10,000               
7637-07-2...  Boron Trifluoride..........  ................  500                     500                        
7647-01-0...  Hydrogen Chloride (gas       l                 5,000                   500                        
               only).                                                                                           
7664-39-3...  Hydrogen Fluoride..........  ................  100                     100                        
7664-41-7...  Ammonia....................  l                 100                     500                        
7664-93-9...  Sulfuric Acid..............  ................  1,000                   1,000                      

[[Page 20489]]

                                                                                                                
7697-37-2...  Nitric Acid................  ................  1,000                   1,000                      
7719-12-2...  Phosphorus Trichloride.....  ................  1,000                   1,000                      
7722-84-1...  Hydrogen Peroxide (Conc >    l                 1,000                   1,000                      
               52%).                                                                                            
7723-14-0...  Phosphorus.................  b, h              1                       100                        
7726-95-6...  Bromine....................  l                 500                     500                        
7778-44-1...  Calcium Arsenate...........  ................  1                       500/10,000                 
7782-41-4...  Fluorine...................  k                 10                      500                        
7782-50-5...  Chlorine...................  ................  10                      100                        
7783-00-8...  Selenious Acid.............  ................  10                      1,000/10,000               
7783-06-4...  Hydrogen Sulfide...........  l                 100                     500                        
7783-07-5...  Hydrogen Selenide..........  ................  10                      10                         
7783-60-0...  Sulfur Tetrafluoride.......  ................  100                     100                        
7783-70-2...  Antimony Pentafluoride.....  ................  500                     500                        
7783-80-4...  Tellurium Hexafluoride.....  k                 100                     100                        
7784-34-1...  Arsenous Trichloride.......  ................  1                       500                        
7784-42-1...  Arsine.....................  ................  100                     100                        
7784-46-5...  Sodium Arsenite............  ................  1                       500/10,000                 
7786-34-7...  Mevinphos..................  ................  10                      500                        
7791-12-0...  Thallous Chloride..........  c, h              100                     100/10,000                 
7791-23-3...  Selenium Oxychloride.......  ................  500                     500                        
7803-51-2...  Phosphine..................  ................  100                     500                        
8001-35-2...  Camphechlor................  ................  1                       500/10,000                 
8065-48-3...  Demeton....................  ................  500                     500                        
10025-73-7..  Chromic Chloride...........  ................  1                       1/10,000                   
10025-87-3..  Phosphorus Oxychloride.....  ................  1,000                   500                        
10026-13-8..  Phosphorus Pentachloride...  b                 500                     500                        
10028-15-6..  Ozone......................  ................  100                     100                        
10031-59-1..  Thallium Sulfate...........  h                 100                     100/10,000                 
10102-18-8..  Sodium Selenite............  h                 100                     100/10,000                 
10102-20-2..  Sodium Tellurite...........  ................  500                     500/10,000                 
10102-43-9..  Nitric Oxide...............  c                 10                      100                        
10102-44-0..  Nitrogen Dioxide...........  ................  10                      100                        
10124-50-2..  Potassium Arsenite.........  ................  1                       500/10,000                 
10140-87-1..  Ethanol, 1,2-Dichloro-,      ................  1,000                   1,000                      
               Acetate.                                                                                         
10210-68-1..  Cobalt Carbonyl............  h                 10                      10/10,000                  
10265-92-6..  Methamidophos..............  ................  100                     100/10,000                 
10294-34-5..  Boron Trichloride..........  ................  500                     500                        
10311-84-9..  Dialifor...................  ................  100                     100/10,000                 
10476-95-6..  Methacrolein Diacetate.....  ................  1,000                   1,000                      
12002-03-8..  Paris Green................  ................  1                       500/10,000                 
12108-13-3..  Manganese, Tricarbonyl       h                 100                     100                        
               Methylcyclopentadienyl.                                                                          
13071-79-9..  Terbufosh..................  h                 100                     100                        
13171-21-6..  Phosphamidon...............  ................  100                     100                        
13194-48-4..  Ethoprophos................  ................  1,000                   1,000                      
13410-01-0..  Sodium Selenate............  ................  100                     100/10,000                 
13450-90-3..  Gallium Trichloride........  ................  500                     500/10,000                 
13463-39-3..  Nickel Carbonyl............  ................  10                      1                          
13463-40-6..  Iron, Pentacarbonyl-.......  ................  100                     100                        
14167-18-1..  Salcomine..................  ................  500                     500/10,000                 
15271-41-7..  Bicyclo[2.2.1]Heptane-2-     ................  500                     500/10,000                 
               Carbonitrile, 5-Chloro-6-                                                                        
               ((((Methylamino)Carbonyl)O                                                                       
               xy)Imino)-, (1s-(1-alpha,2-                                                                      
               beta,4-alpha,5-alpha,6E))-.                                                                      
16752-77-5..  Methomyl...................  h                 100                     500/10,000                 
17702-41-9..  Decaborane(14).............  ................  500                     500/10,000                 
17702-57-7..  Formparanated..............  d                 1                       100/10,000                 
19287-45-7..  Diborane...................  ................  100                     100                        
19624-22-7..  Pentaborane................  ................  500                     500                        
20830-75-5..  Digoxin....................  h                 10                      10/10,000                  
20859-73-8..  Aluminum Phosphide.........  b                 100                     500                        
21548-32-3..  Fosthietan.................  ................  500                     500                        
21609-90-5..  Leptophos..................  ................  500                     500/10,000                 
21908-53-2..  Mercuric Oxide.............  ................  500                     500/10,000                 
21923-23-9..  Chlorthiophos..............  h                 500                     500                        
22224-92-6..  Fenamiphos.................  ................  10                      10/10,000                  
23135-22-0..  Oxamyl.....................  d                 1                       100/10,000                 
23422-53-9..  Formetanate Hydrochloride..  d, h              1                       500/10,000                 
23505-41-1..  Pirimifos-Ethyl............  ................  1,000                   1,000                      
24017-47-8..  Triazofos..................  ................  500                     500                        
24934-91-6..  Chlormephos................  ................  500                     500                        

[[Page 20490]]

                                                                                                                
26419-73-8..  Carbamic Acid, Methyl-, O-   d                 1                       100/10,000                 
               (((2,4-Dimethyl-1, 3-                                                                            
               Dithiolan-2-                                                                                     
               yl)Methylene)Amino)-.                                                                            
26628-22-8..  Sodium Azide (Na(N3))......  b                 1,000                   500                        
27137-85-5..  Trichloro(Dichlorophenyl)Si  ................  500                     500                        
               lane.                                                                                            
28347-13-9..  Xylylene Dichloride........  ................  100                     100/10,000                 
28772-56-7..  Bromadiolone...............  ................  100                     100/10,000                 
30674-80-7..  Methacryloyloxyethyl         ................  100                     100                        
               Isocyanateh.                                                                                     
39196-18-4..  Thiofanox..................  ................  100                     100/10,000                 
50782-69-9..  Phosphonothioic Acid,        ................  100                     100                        
               Methyl-, S-(2-(Bis(1-                                                                            
               Methylethyl)Amino)Ethyl) O-                                                                      
               Ethyl Ester.                                                                                     
53558-25-1..  Pyriminil..................  h                 100                     100/10,000                 
58270-08-9..  Zinc, Dichloro(4,4-Dimethyl- ................  100                     100/10,000                 
               5((((Methylamino)                                                                                
               Carbonyl)Oxy)Imino)Pentane                                                                       
               nitrile)-, (T-4)-.                                                                               
62207-76-5..  Cobalt, ((2,2'-(1,2-         ................  100                     100/10,000                 
               Ethanediylbis                                                                                    
               (Nitrilomethylidyne))                                                                            
               Bis(6-Fluorophenolato)) (2-                                                                      
               )-N,N',O,O')-.                                                                                   
----------------------------------------------------------------------------------------------------------------
*Only the statutory or final RQ is shown. For more information, see 40 CFR Table 302.4.                         
Notes:                                                                                                          
a. This chemical does not meet acute toxicity criteria. Its TPQ is set at 10,000 pounds.                        
b. This material is a reactive solid. The TPQ does not default to 10,000 pounds for non-powder, non-molten, non-
  solution form.                                                                                                
c. The calculated TPQ changed after technical review as described in the technical support document.            
d. Indicates that the RQ is subject to change when the assessment of potential carcinogenicity and/or other     
  toxicity is completed.                                                                                        
e. Statutory reportable quantity for purposes of notification under SARA sect 304(a)(2).                        
f. [Reserved]                                                                                                   
g. New chemicals added that were not part of the original list of 402 substances.                               
h. Revised TPQ based on new or re-evaluated toxicity data.                                                      
j. TPQ is revised to its calculated value and does not change due to technical review as in proposed rule.      
k. The TPQ was revised after proposal due to calculation error.                                                 
l. Chemicals on the original list that do not meet toxicity criteria but because of their high production volume
  and recognized toxicity are considered chemicals of concern (``Other chemicals'').                            


[FR Doc. 96-11209 Filed 5-6-96; 8:45 am]
BILLING CODE 6560-50-P