[Federal Register Volume 81, Number 76 (Wednesday, April 20, 2016)]
[Pages 23294-23296]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-09155]



[EPA-HQ-OPP-2015-0393; FRL-9944-09]

Aquashade, Nithiazine, d-limonene, and 2H-Cyclopent(d)isothiazol-
3(4H)-one, 5,6-dihydro-2-methyl- (MTI) Registration Review Interim 
Decisions; Notice of Availability

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice.


SUMMARY: This notice announces the availability of EPA's interim 
registration review decisions for the pesticides aquashade, nithiazine, 
d-limonene, and 2H-Cyclopent(d)isothiazol-3(4H)-one, 5,6-dihydro-2-
methyl- (MTI). Registration review is EPA's periodic review of 
pesticide registrations to ensure that each pesticide continues to 
satisfy the statutory standard for registration, that is, that the 
pesticide can perform its intended function without causing 
unreasonable adverse effects on human health or the environment. 
Through this program, EPA is ensuring that each pesticide's 
registration is based on current scientific and other knowledge, 
including its effects on human health and the environment.

    For pesticide specific information, contact: The Chemical Review 
Manager for the pesticide of interest identified in the Table in Unit 
II. For general information on the registration review program, 
contact: Richard Dumas, Pesticide Re-Evaluation Division (7508P), 
Office of Pesticide Programs, Environmental Protection Agency, 1200 
Pennsylvania Ave. NW., Washington, DC 20460-0001; telephone number: 
(703) 308-8015; email address: [email protected].


I. General Information

A. Does this action apply to me?

    This action is directed to the public in general, and may be of 
interest to a wide range of stakeholders including environmental, human 
health, farm workers, and agricultural advocates; the chemical 
industry; pesticide users; and members of the public interested in the 
sale, distribution, or use of pesticides. Since others also may be 
interested, the Agency has not attempted to describe all the specific 
entities that may be affected by this action. If you have any questions 
regarding the applicability of this action to a particular entity, 
consult the pesticide specific contact person listed in the Table in 
Unit II.


B. How can I get copies of this document and other related information?

    The docket for this action, identified by docket identification 
(ID) number EPA-HQ-OPP-2015-0393 is available at http://www.regulations.gov or at the Office of Pesticide Programs Regulatory 
Public Docket (OPP Docket) in the Environmental Protection Agency 
Docket Center (EPA/DC), West William Jefferson Clinton Bldg., Rm. 3334, 
1301 Constitution Ave. NW., Washington, DC 20460-0001. The Public 
Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through 
Friday, excluding legal holidays. The telephone number for the Public 
Reading Room is (202) 566-1744, and the telephone number for the OPP 
Docket is (703) 305-5805. Please review the visitor instructions and 
additional information about the docket available at http://www.epa.gov/dockets.

II. What action is the Agency taking?

    Pursuant to 40 CFR 155.58(c), this notice announces the 
availability of EPA's interim registration review decision for the 
pesticides found in the Table in this unit.

                                  Table--Registration Review Interim Decisions
 Registration review case name and                                            Chemical review manager, telephone
                No.                         Pesticide docket ID No.                 number, email address
Aquashade (Case 4010).............  EPA-HQ-OPP-2015-0639...................  Christina Motilall,
                                                                              [email protected],
                                                                             (703) 603-0522.

[[Page 23295]]

Nithiazine (Case 7415)............  EPA-HQ-OPP-2008-0847...................  Brian Kettl, [email protected],
                                                                             (703) 347-0535.
d-limonene (Case 3083)............  EPA-HQ-OPP-2010-0673...................  Caitlin Newcamp,
                                                                              [email protected],
                                                                             (703) 347-0325.
2H-Cyclopent(d)isothiazol-3(4H)-    EPA-HQ-OPP-2015-0266...................  Rachel Ricciardi,
 one, 5,6-dihydro-2-methyl- (MTI)                                             [email protected],
 (Case 5018).                                                                (703) 347-0465.

    Aquashade (Interim Decision). Aquashade is as an aquatic herbicide 
whose mode of action is light filtration. It is primarily used in small 
water bodies like ornamental ponds and small lakes, fountains and other 
landscaping water features, swimming holes, aquaculture ponds, and 
animal watering holes. The Ecological Risk Assessment found no level of 
concern risk exceedances to all taxa. The Human Health Risk Assessment 
also indicated no risk (dietary, residential, and occupational). 
Aquashade was not on either initial list of chemicals to be screened 
under the Endocrine Disruptor Screening Program (EDSP), and an 
endangered species assessment has not been conducted at this time. No 
mitigation is proposed at this time. The Agency's final registration 
review decision is dependent upon the assessment of risks to threatened 
and endangered species and after an EDSP Federal Food, Drug and 
Cosmetic Act (FFDCA) Section 408(p) determination has been made.
    Nithiazine (Interim Decision). The Nithiazine Summary Document was 
published on March 18, 2009. Nithiazine is used as part of a bait 
station to control flies in animal housing facilities and other 
industrial operations. The structure of the bait station makes contact 
between nithiazine and humans unlikely; therefore, there are no human 
health risk concerns for nithiazine. Since the active ingredient is 
contained in a bait station, no ecological exposure is expected. 
Therefore, there are no ecological risk concerns for nithiazine. 
Nithiazine does not pose a threat to pollinators and the Agency has 
determined that it will cause No Effect to listed species. The Agency 
has determined that no additional data are required at this time to 
support the continuing registrations of nithiazine products. The final 
decision on the registration review for nithiazine will occur after an 
EDSP FFDCA section 408(p) determination has been made.
    d-Limonene (Interim Decision). The registration review docket for 
d-limonene opened in September 2010. d-Limonene is a naturally 
occurring chemical obtained from the rind of citrus fruits. It is 
registered for use as an acaricide, insecticide, herbicide, insect 
repellent, and is used as an inert ingredient for scent and flavoring 
in other non-pesticide products. d-Limonene is currently registered for 
use in/on food crops (citrus, pome fruits, grapes), feed crops, non-
food crops (ornamentals, Christmas trees, fencerows, recreational 
areas, wood protection) and for residential uses. EPA published the 
draft human health and ecological risk assessments in December 2014. A 
qualitative human health assessment was conducted, and the Agency 
concluded that d-limonene does not pose a risk to human health. A 
quantitative ecological risk assessment was conducted and levels of 
concern were exceeded for terrestrial plants and mammals (risks to 
birds and terrestrial invertebrates could not be precluded). The Agency 
is requiring modifications to several labels to reduce potential risks 
of d-limonene to terrestrial birds and mammals. In addition, the Agency 
will make several modifications to 40 CFR part 180. The Agency will 
establish an exemption for the herbicidal uses of d-limonene from a 
tolerance under subpart D, and existing exemption from tolerances from 
the repellant uses of d-limonene under 180.539 subpart C will be moved 
to subpart D for insecticidal uses. This Interim Decision does not 
cover the EDSP component of this registration review case, nor does it 
include a complete endangered species assessment or pollinator risk 
assessment. The Agency's final registration review decision is 
dependent upon the assessment of risks to threatened and endangered 
species and pollinators as well as a determination under FFDCA Section 
408(p) regarding endocrine disruption.
    2H-Cyclopent(d)isothiazol- 3(4H)-one, 5,6-dihydro-2- methyl- 
(Interim Decision). There is one EPA registered product containing 
active ingredient 2H-Cyclopent(d)isothiazol-3(4H)-one, 5,6- dihydro-2- 
methyl-, also known as MTI. MTI is a materials preservative for use in 
the manufacture of aqueous compositions used in the manufacture of 
imaging products. The Agency did not require any additional data in 
support of MTI's registration review or need to conduct human health or 
environmental risk assessments due to the lack of exposure concerns for 
MTI's registered use. Based on the lack of potential exposure, the 
Agency made a ``no effect'' determination for listed species under the 
Endangered Species Act (ESA). Except for the EDSP component of the MTI 
registration review case, the Agency is not requiring additional data 
and is not proposing any risk reduction measures for this case. The 
final decision on the registration review for MTI will occur after the 
EDSP FFDCA section 408(p) determination is made.
    Pursuant to 40 CFR 155.57, a registration review decision is the 
Agency's determination whether a pesticide meets, or does not meet, the 
standard for registration in the Federal Insecticide, Fungicide, and 
Rodenticide Act (FIFRA). EPA has considered the pesticides found in the 
Table in this unit in light of the FIFRA standard for registration. The 
Interim Decision document in the dockets describes the Agency's 
rationale for issuing a registration review interim decision for these 
    In addition to the interim registration review decision documents, 
the registration review dockets for the pesticides listed in the Table 
in this unit also includes other relevant documents related to the 
registration review of these cases. The proposed interim registration 
review decisions were posted to the docket and the public was invited 
to submit any comments or new information.
    EPA addresses the comments or information received during the 60-
day comment period in the discussion for each pesticide listed in this 
document. During the 60-day comment period, no public comments were 
received for aquashade, nithiazine, or 2H-Cyclopent(d)isothiazol- 
3(4H)-one, 5,6-

[[Page 23296]]

dihydro-2- methyl (MTI). Comments were received for d-limonene however 
the public comments received were not substantive and did not affect 
the Agency's interim decision.
    Pursuant to 40 CFR 155.58(c), the registration review case docket 
for the pesticides listed in the Table in Unit II will remain open 
until all actions required in the interim decisions have been 
    Background on the registration review program is provided at: 
Links to earlier documents related to the registration review of these 
pesticides are provided in the pesticide chemical search data base 
accessible at https://iaspub.epa.gov/apex/pesticides/f?p=chemicalsearch:1.

    Authority:  7 U.S.C. 136 et seq.

    Dated: April 13, 2016.
Yu-Ting Guilaran,
Director, Pesticide Re-Evaluation Division, Office of Pesticide 
[FR Doc. 2016-09155 Filed 4-19-16; 8:45 am]