Document ID: EPA-HQ-OPP-2006-0165-0010
Agency: epa
Document Type: Rule
Title: Dimethenamid; Pesticide Tolerance
Posted Date: 2007-08-08T04:00Z

[Federal Register: August 8, 2007 (Volume 72, Number 152)]
[Rules and Regulations]               
[Page 44384-44388]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr08au07-9]                         

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 180

[EPA-HQ-OPP-2006-0165; FRL-8138-2]

 
Dimethenamid; Pesticide Tolerance

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: This regulation establishes a tolerance for residues of 
dimethenamid in or on grasses grown for seed. Interregional Research 
Project No. 4 (IR-4) requested this tolerance under the Federal Food, 
Drug, and Cosmetic Act (FFDCA).

DATES: This regulation is effective August 8, 2007. Objections and 
requests for hearings must be received on or before October 9, 2007, 
and must be filed in accordance with the instructions provided in 40 
CFR part 178 (see also Unit I.C. of the SUPPLEMENTARY INFORMATION).

ADDRESSES: EPA has established a docket for this action under docket 
identification (ID) number EPA-HQ-OPP-2006-0165. To access the 
electronic docket, go to http://www.regulations.gov, select ``Advanced 

Search,'' then ``Docket Search.'' Insert the docket ID number where 
indicated and select the ``Submit'' button. Follow the instructions on 
the regulations.gov web site to view the docket index or access 
available documents. All documents in the docket are listed in the 
docket index available in regulations.gov. Although listed in the 
index, some information is not publicly available, e.g., Confidential 
Business Information (CBI) or other information whose disclosure is 
restricted by statute. Certain other material, such as copyrighted 
material, is not placed on the Internet and will be publicly available 
only in hard copy form. Publicly available docket materials are 
available in the electronic docket at http://www.regulations.gov,or, if 

only available in hard copy, at the OPP Regulatory Public Docket in Rm. 
S-

[[Page 44385]]

4400, One Potomac Yard (South Bldg.), 2777 S. Crystal Dr., Arlington, 
VA. The Docket Facility is open from 8:30 a.m. to 4 p.m., Monday 
through Friday, excluding legal holidays. The Docket Facility telephone 
number is (703) 305-5805.

FOR FURTHER INFORMATION CONTACT: Jim Tompkins, Registration Division, 
Office of Pesticide Programs, Environmental Protection Agency, 1200 
Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone number: 
(703) 305-5639; e-mail address: Tompkins.jim@epa.gov.

SUPPLEMENTARY INFORMATION:

I. General Information

A. Does this Action Apply to Me?

    You may be potentially affected by this action if you are an 
agricultural producer, food manufacturer, or pesticide manufacturer. 
Potentially affected entities may include, but are not limited to those 
engaged in the following activities:
     Crop production (NAICS code 111), e.g., agricultural 
workers; greenhouse, nursery, and floriculture workers; farmers.
     Animal production (NAICS code 112), e.g., cattle ranchers 
and farmers, dairy cattle farmers, livestock farmers.
     Food manufacturing (NAICS code 311), e.g., agricultural 
workers; farmers; greenhouse, nursery, and floriculture workers; 
ranchers; pesticide applicators.
     Pesticide manufacturing (NAICS code 32532), e.g., 
agricultural workers; commercial applicators; farmers; greenhouse, 
nursery, and floriculture workers; residential users.
    This listing is not intended to be exhaustive, but rather to 
provide a guide for readers regarding entities likely to be affected by 
this action. Other types of entities not listed in this unit could also 
be affected. The North American Industrial Classification System 
(NAICS) codes have been provided to assist you and others in 
determining whether this action might apply to certain entities. If you 
have any questions regarding the applicability of this action to a 
particular entity, consult the person listed under FOR FURTHER 
INFORMATION CONTACT.

B. How Can I Access Electronic Copies of this Document?

    In addition to accessing an electronic copy of this Federal 
Register document through the electronic docket at http://www.regulations.gov
, you may access this Federal Register document 

electronically through the EPA Internet under the ``Federal Register'' 
listings at http://www.epa.gov/fedrgstr. You may also access a 

frequently updated electronic version of EPA's tolerance regulations at 
40 CFR part 180 through the Government Printing Office's pilot e-CFR 
site at http://www.gpoaccess.gov/ecfr.

C. Can I File an Objection or Hearing Request?

    Under section 408(g) of the FFDCA, any person may file an objection 
to any aspect of this regulation and may also request a hearing on 
those objections. You must file your objection or request a hearing on 
this regulation in accordance with the instructions provided in 40 CFR 
part 178. To ensure proper receipt by EPA, you must identify docket ID 
number EPA-HQ-OPP-2006-0165 in the subject line on the first page of 
your submission. All requests must be in writing, and must be mailed or 
delivered to the Hearing Clerk as required by 40 CFR part 178 on or 
before October 9, 2007.
    In addition to filing an objection or hearing request with the 
Hearing Clerk as described in 40 CFR part 178, please submit a copy of 
the filing that does not contain any CBI for inclusion in the public 
docket that is described in ADDRESSES. Information not marked 
confidential pursuant to 40 CFR part 2 may be disclosed publicly by EPA 
without prior notice. Submit this copy, identified by docket ID number 
EPA-HQ-OPP-2006-0165, by one of the following methods:
     Federal eRulemaking Portal: http://www.regulations.gov. 

Follow the on-line instructions for submitting comments.
     Mail: Office of Pesticide Programs (OPP) Regulatory Public 
Docket (7502P), Environmental Protection Agency, 1200 Pennsylvania 
Ave., NW., Washington, DC 20460-0001.
     Delivery: OPP Regulatory Public Docket (7502P), 
Environmental Protection Agency, Rm. S-4400, One Potomac Yard (South 
Bldg.), 2777 S. Crystal Dr., Arlington, VA. Deliveries are only 
accepted during the Docket's normal hours of operation (8:30 a.m. to 4 
p.m., Monday through Friday, excluding legal holidays). Special 
arrangements should be made for deliveries of boxed information. The 
Docket Facility telephone number is (703) 305-5805.

II. Petition for Tolerance

    In the Federal Register of March 22, 2006 (71 FR 14521) (FRL-7766-
7), EPA issued a notice pursuant to section 408(d)(3) of the FFDCA, 21 
U.S.C. 346a(d)(3), announcing the filing of a pesticide petition (PP 
0F6138) by Interregional Research Project No. 4 (IR-4), Technology 
Center of New Jersey, Rutgers, the State of New Jersey, 681 U.S. 
Highway 1 South, North Brunswick, NJ 08902-3390. The petition 
requested that 40 CFR 180.464 be amended by establishing a tolerance 
for residues of the herbicide dimethenamid in or on grass, forage at 
0.05 parts per million (ppm); grass, hay at 0.30 ppm; grass, straw at 
0.01 ppm; and grass, seed screenings at 0.01 ppm. That notice 
referenced a summary of the petition prepared by BASF Corporation, the 
registrant, which is available to the public in the docket, http://www.regulations.gov.
 There were no comments received in response to the 

notice of filing. Based on review of the residue data, the EPA 
determined that the tolerance for dimethenamid in or on grass, forage 
at should be established at 0.15 ppm instead of 0.05 ppm requested by 
the registrant, and the tolerance for grass, hay should be established 
at 2.5 ppm instead of 0.30 ppm as requested by the registrant.

III. Aggregate Risk Assessment and Determination of Safety

    Section 408(b)(2)(A)(i) of the FFDCA allows EPA to establish a 
tolerance (the legal limit for a pesticide chemical residue in or on a 
food) only if EPA determines that the tolerance is ``safe.'' Section 
408(b)(2)(A)(ii) of the FFDCA defines ``safe'' to mean that ``there is 
a reasonable certainty that no harm will result from aggregate exposure 
to the pesticide chemical residue, including all anticipated dietary 
exposures and all other exposures for which there is reliable 
information.'' This includes exposure through drinking water and in 
residential settings, but does not include occupational exposure. 
Section 408(b)(2)(C) of the FFDCA requires EPA to give special 
consideration to exposure of infants and children to the pesticide 
chemical residue in establishing a tolerance and to ``ensure that there 
is a reasonable certainty that no harm will result to infants and 
children from aggregate exposure to the pesticide chemical 
residue....'' These provisions were added to the FFDCA by the Food 
Quality Protection Act (FQPA) of 1996.
    Consistent with FFDCA section 408(b)(2)(D), and the factors 
specified in section 408(b)(2)(D), EPA has reviewed the available 
scientific data and other relevant information in support of this 
action. EPA has sufficient data to assess the hazards of and to make a 
determination on aggregate exposure for the petitioned-for tolerance 
for residues of dimethenamid in or on grass, forage at 0.15 parts per 
million (ppm); grass, hay at 2.5 ppm; grass, straw at 0.01 ppm; and 
grass, seed screenings at 0.01

[[Page 44386]]

ppm. EPA's assessment of exposures and risks associated with 
establishing the tolerance follows.

A. Toxicological Profile

    EPA has evaluated the available toxicity data and considered its 
validity, completeness, and reliability as well as the relationship of 
the results of the studies to human risk. EPA has also considered 
available information concerning the variability of the sensitivities 
of major identifiable subgroups of consumers, including infants and 
children. Specific information on the studies received and the nature 
of the adverse effects caused by dimethenamid as well as the no-
observed-adverse-effect-level (NOAEL) and the lowest-observed-adverse-
effect-level (LOAEL) from the toxicity studies can be found in the 
document ``Dimethenamid-P Human Health Risk Assessment for Proposed Use 
on Grasses Grown for Seed, PC Codes: 120051 and 129051, Petition No: 
0F6138, DP Num: 337887''. The document is available at http://www.regulations.gov.
 in the docket established by this action, which is 

described under ADDRESSES, and is identified as EPA-HQ-OPP-2006-0165 in 
that docket.

B. Toxicological Endpoints

    For hazards that have a threshold below which there is no 
appreciable risk, the toxicological level of concern (LOC) is derived 
from the highest dose at which no adverse effects are observed (the 
NOAEL) in the toxicology study identified as appropriate for use in 
risk assessment. However, if a NOAEL cannot be determined, the lowest 
dose at which adverse effects of concern are identified (the LOAEL) is 
sometimes used for risk assessment. Uncertainty/safety factors (UF) are 
used in conjunction with the LOC to take into account uncertainties 
inherent in the extrapolation from laboratory animal data to humans and 
in the variations in sensitivity among members of the human population 
as well as other unknowns. Safety is assessed for acute and chronic 
risks by comparing aggregate exposure to the pesticide to the acute 
population adjusted dose (``aPAD'') and chronic population adjusted 
dose (``cPAD''). The aPAD and cPAD are calculated by dividing the LOC 
by all applicable uncertainty/safety factors. Short-term, intermediate-
term, and long-term risks are evaluated by comparing aggregate exposure 
to the LOC to ensure that the margin of exposure (``MOE'') called for 
by the product of all applicable uncertainty/safety factors is not 
exceeded.
    For non-threshold risks, the Agency assumes that any amount of 
exposure will lead to some degree of risk and estimates risk in terms 
of the probability of occurrence of additional adverse cases. 
Generally, cancer risks are considered non-threshold. For more 
information on the general principles EPA uses in risk characterization 
and a complete description of the risk assessment process, see http://www.epa.gov/fedrgstr/EPA-PEST/1997/November/Day-26/p30948.htm
.

    A summary of the toxicological endpoints for dimethenamid used for 
human risk assessment can be found at http://www.regulations.gov in document 

``Dimethenamid-P Human Health Risk Assessment for Proposed Use on 
Grasses Grown for Seed, PC Codes: 120051 and 129051, Petition No: 
0F6138, DP Num: 337887'' on page 16 in Docket ID EPA-HQ-OPP-2006-0165.

C. Exposure Assessment

    1. Dietary exposure from food and feed uses. In evaluating dietary 
exposure to dimethenamid, EPA considered exposure under the petitioned-
for tolerances as well as all existing dimethenamid tolerances in (40 
CFR 180.464). EPA assessed dietary exposures from (R,S)-2-chloro-N-[(1-
methyl-2-methoxy) ethyl]-N-(2,4-dimethylthien-3-yl)-acetamide in food 
as follows:
    i. Acute exposure. Quantitative acute dietary exposure and risk 
assessments are performed for a food-use pesticide, if a toxicological 
study has indicated the possibility of an effect of concern occurring 
as a result of a 1-day or single exposure. In estimating acute dietary 
exposure, EPA used food consumption information from the United States 
Department of Agriculture (USDA) 1994-1996 and 1998 Nationwide 
Continuing Surveys of Food Intake by Individuals (CSFII). As to residue 
levels in food, EPA assumed all foods for which there are tolerances 
were treated and contain tolerance-level residues.
    ii. Chronic exposure. In conducting the chronic dietary exposure 
assessment EPA used the food consumption data from the USDA 1994-1996 
and 1998 Nationwide CSFII. As to residue levels in food, EPA assumed 
all foods for which there are tolerances were treated and contain 
tolerance-level residues.
    iii. Cancer. Dimethenamid was classified as Group C - possible 
human carcinogen based on benign liver tumors (males) in rats. EPA 
determined that the chronic Reference dose (cRfD) would be protective 
of any cancer risk posed by dimethenamid because the cRfD of 0.05 
milligrams/kilogram/day (mg/kg/day) used for risk assessment is based 
on non-cancer precursor effects in the liver. In making this 
determination, EPA also took into account that the tumor incidences 
were only slightly above historical control levels, only showed 
statistical significance as increased trends and not by pairwise 
between control and treated animals, only evidenced a statistically 
significant trend when benign and malignant tumors were combined, and 
were only seen in one species. Therefore, the cRfD is considered 
protective of both non-cancer and cancer effects.
    2. Dietary exposure from drinking water. The Agency lacks 
sufficient monitoring data to complete a comprehensive dietary exposure 
analysis and risk assessment for dimethenamid in drinking water. 
Because the Agency does not have comprehensive monitoring data, 
drinking water concentration estimates are made by reliance on 
simulation or modeling taking into account data on the environmental 
fate characteristics of dimethenamid. Further information regarding EPA 
drinking water models used in pesticide exposure assessment can be 
found at http://www.epa.gov/oppefed1/models/water/index.htm.

    Based on the EPA's Pesticide Root Zone Model/Exposure Analysis 
Modeling System (PRZM/EXAMS) and Screening Concentration in Ground 
Water (SCI-GROW) models, the estimated drinking water concentrations 
(EDWCs) of dimethenamid for acute exposures are estimated to be 9.0 
parts per billion (ppb) for surface water and 0.34 ppb for ground 
water. The EDWCs for chronic exposures are estimated to be 3.8 ppb for 
surface water and 0.34 ppb for ground water.
    Modeled estimates of drinking water concentrations were directly 
entered into the dietary exposure model. The EDWCs for use sites (other 
than grasses grown for seed) with the highest values were used. For 
acute dietary risk assessment, the water concentration value of 66.7 
ppb was used to access the contribution to drinking water. For chronic 
dietary risk assessment, the water concentration of value 20.2 ppb was 
used to access the contribution to drinking water.
    3. From non-dietary exposure. The term ``residential exposure'' is 
used in this document to refer to non-occupational, non-dietary 
exposure (e.g., for lawn and garden pest control, indoor pest control, 
termiticides, and flea and tick control on pets).
    Dimethenamid is not registered for use on any sites that would 
result in residential exposure.
    4. Cumulative effects from substances with a common mechanism of 
toxicity.

[[Page 44387]]

Section 408(b)(2)(D)(v) of the FFDCA requires that, when considering 
whether to establish, modify, or revoke a tolerance, the Agency 
consider ``available information'' concerning the cumulative effects of 
a particular pesticide's residues and ``other substances that have a 
common mechanism of toxicity.''
    Unlike other pesticides for which EPA has followed a cumulative 
risk approach based on a common mechanism of toxicity, EPA has not made 
a common mechanism of toxicity finding as to dimethenamid and any other 
substances and dimethenamid does not appear to produce a toxic 
metabolite produced by other substances. For the purposes of this 
tolerance action, therefore, EPA has not assumed that dimethenamid has 
a common mechanism of toxicity with other substances. For information 
regarding EPA's efforts to determine which chemicals have a common 
mechanism of toxicity and to evaluate the cumulative effects of such 
chemicals, see EPA's website at http://www.epa.gov/pesticides/cumulative
.

D. Safety Factor for Infants and Children

    1. In general. Section 408 of the FFDCA provides that EPA shall 
apply an additional (``10X'') tenfold margin of safety for infants and 
children in the case of threshold effects to account for prenatal and 
postnatal toxicity and the completeness of the database on toxicity and 
exposure unless EPA determines based on reliable data that a different 
margin of safety will be safe for infants and children. This additional 
margin of safety is commonly referred to as the FQPA safety factor. In 
applying this provision, EPA either retains the default value of 10X 
when reliable data do not support the choice of a different factor, or, 
if reliable data are available, EPA uses a different additional FQPA 
safety factor value based on the use of traditional uncertainty/safety 
factors and/or special FQPA safety factors, as appropriate.
    2. Prenatal and postnatal sensitivity. There is no concern for 
increased qualitative and/or quantitative susceptibility following pre-
and post-natal exposure to the (RS) or (S) dimethenamid technical 
products in rats and rabbits. In the developmental toxicity study in 
rats there was an increased incidence of post-implantation loss and 
minor skeletal variations. In the developmental toxicity study in 
rabbits, late resorptions and minor skeletal variations were observed 
at the highest dose tested. In the rabbit, the developmental effects 
occurred at the same dose as maternal toxicity; whereas in the rat, the 
developmental effects occurred at much higher doses than in the dams. 
The reproduction study showed decreases in body weight in both pups and 
parental animals at the same dose levels.
    3. Conclusion. EPA has determined that reliable data show that it 
would be safe for infants and children to reduce the FQPA safety factor 
to 1X. That decision is based on the following findings:
    i. The toxicity database for dimethenamid is complete.
    ii. The toxicity data showed no increase in qualitative and/or 
quantitative susceptibility in fetuses and pups with in utero and pre- 
and post-natal exposure.
    iii. There is no evidence that dimethenamid is a neurotoxic 
chemical and there is no need for a developmental neurotoxicity study 
or additional uncertainty factors to account for neurotoxicity.
    iv. There are no residual uncertainties identified in the exposure 
databases. The dietary food exposure assessment utilizes proposed 
tolerance level residues and 100% crop treated information for all 
commodities, which results in very high-end estimates of dietary 
exposure. The dietary drinking water assessment utilizes values 
generated by model and associated modeling parameters which are 
designed to provide health protective, high-end estimates of water 
concentrations.

E. Aggregate Risks and Determination of Safety

    Safety is assessed for acute and chronic risks by comparing 
aggregate exposure to the pesticide to the aPAD and cPAD. For linear 
cancer risks, EPA calculates the probability of additional cancer cases 
given aggregate exposure. Short-term, intermediate-term, and long-term 
risks are evaluated by comparing aggregate exposure to the LOC to 
ensure that the MOE called for by the product of all applicable 
uncertainty/safety factors is not exceeded.
    1. Acute risk. Using the exposure assumptions discussed in this 
unit for acute exposure, the acute dietary exposure from food and water 
to dimethenamid will occupy < 1% of the aPAD for the population group 
(women ages 13-49) receiving the greatest exposure.
    2. Chronic risk. Using the exposure assumptions described in this 
unit for chronic exposure, EPA has concluded that exposure to 
dimethenamid from food and water will utilize 3% of the cPAD for the 
population group (all infants (< 1 year)) receiving the greatest 
exposure. There are no residential uses for dimethenamid that result in 
chronic residential exposure to dimethenamid.
    3. Short-term risk. Dimethenamid is not registered for use on any 
sites that would result in residential exposure. Therefore, the 
aggregate risk is the sum of the risk from food and water.
    4. Intermediate-term risk. Dimethenamid is not registered for use 
on any sites that would result in residential exposure. Therefore, the 
aggregate risk is the sum of the risk from food and water, which do not 
exceed the Agency's LOC.
    5. Aggregate cancer risk for U.S. population. The cRfD of 0.05 mg/
kg/day used for risk assessment is based on non-cancer precursor 
effects. Therefore, the cRfD is considered protective of both non-
cancer and cancer effects. Consequently, a separate aggregate cancer 
risk assessment was not conducted.
    6. Determination of safety. Based on these risk assessments, EPA 
concludes that there is a reasonable certainty that no harm will result 
to the general population, or to infants and children from aggregate 
exposure to dimethenamid residues.

IV. Other Considerations

A. Analytical Enforcement Methodology

    Adequate enforcement methodology (gas chromatography with a 
nitrogen phosphorus detector (GC/NPD) method (AM-0884-0193-1) is 
available to enforce the tolerance expression. The method may be 
requested from: Chief, Analytical Chemistry Branch, Environmental 
Science Center, 701 Mapes Rd., Ft. Meade, MD 20755-5350; telephone 
number: (410) 305-2905; e-mail address: residuemethods@epa.gov.

B. International Residue Limits

    An International Residue Limit (IRL) Status Sheet is appended to 
the Dimethenamid-P Human Health Risk Assessment located in the docket 
for this notice. Codex has established maximum residue limits (MRLs), 
expressed in terms of dimethenamid-P and its enantiomer, for various 
crop commodities but not for grass commodities. Canada and Mexico have 
also established MRLs for dimethenamid-P and its enantiomer in/on 
various crop commodities but not for grass, hay; grass, forage; grass, 
straw; or grass, seed screenings.

V. Conclusion

    Therefore, the tolerance is established for residues of 
dimethenamid, in or on grass, forage at 0.15 ppm; grass, hay at 2.5 
ppm; grass, straw at 0.01 ppm; and grass, seed screenings at 0.01 ppm.

[[Page 44388]]

VI. Statutory and Executive Order Reviews

    This final rule establishes a tolerance under section 408(d) of the 
FFDCA in response to a petition submitted to the Agency. The Office of 
Management and Budget (OMB) has exempted these types of actions from 
review under Executive Order 12866, entitled Regulatory Planning and 
Review (58 FR 51735, October 4, 1993). Because this rule has been 
exempted from review under Executive Order 12866, this rule is not 
subject to Executive Order 13211, Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use (66 FR 28355, 
May 22, 2001) or Executive Order 13045, entitled Protection of Children 
from Environmental Health Risks and Safety Risks (62 FR 19885, April 
23, 1997). This final rule does not contain any information collections 
subject to OMB approval under the Paperwork Reduction Act (PRA), 44 
U.S.C. 3501 et seq., nor does it require any special considerations 
under Executive Order 12898, entitled Federal Actions to Address 
Environmental Justice in Minority Populations and Low-Income 
Populations (59 FR 7629, February 16, 1994). Since tolerances and 
exemptions that are established on the basis of a petition under 
section 408(d) of the FFDCA, such as the tolerance in this final rule, 
do not require the issuance of a proposed rule, the requirements of the 
Regulatory Flexibility Act (RFA) (5 U.S.C. 601 et seq.) do not apply.
    This final rule directly regulates growers, food processors, food 
handlers and food retailers, not States or tribes, nor does this action 
alter the relationships or distribution of power and responsibilities 
established by Congress in the preemption provisions of section 
408(n)(4) of FFDCA. As such, the Agency has determined that this action 
will not have a substantial direct effect on States or tribal 
governments, on the relationship between the national government and 
the States or tribal governments, or on the distribution of power and 
responsibilities among the various levels of government or between the 
Federal Government and Indian tribes. Thus, the Agency has determined 
that Executive Order 13132, entitled Federalism (64 FR 43255, August 
10, 1999) and Executive Order 13175, entitled Consultation and 
Coordination with Indian Tribal Governments (65 FR 67249, November 6, 
2000) do not apply to this rule. In addition, This rule does not impose 
any enforceable duty or contain any unfunded mandate as described under 
Title II of the Unfunded Mandates Reform Act of 1995 (UMRA) (Public Law 
104-4).
    This action does not involve any technical standards that would 
require Agency consideration of voluntary consensus standards pursuant 
to section 12(d) of the National Technology Transfer and Advancement 
Act of 1995 (NTTAA), Public Law 104-113, section 12(d) (15 U.S.C. 272 
note).

VII. Congressional Review Act

    The Congressional Review Act, 5 U.S.C. 801 et seq., generally 
provides that before a rule may take effect, the agency promulgating 
the rule must submit a rule report to each House of the Congress and to 
the Comptroller General of the United States. EPA will submit a report 
containing this rule and other required information to the U.S. Senate, 
the U.S. House of Representatives, and the Comptroller General of the 
United States prior to publication of this final rule in the Federal 
Register. This final rule is not a ``major rule'' as defined by 5 
U.S.C. 804(2).

List of Subjects in 40 CFR Part 180

    Environmental protection, Administrative practice and procedure, 
Agricultural commodities, Pesticides and pests, Reporting and 
recordkeeping requirements.

    Dated: July 23, 2007.
Lois Rossi,
Director, Registration Division, Office of Pesticide Programs.

0
Therefore, 40 CFR chapter I is amended as follows:

PART 180--[AMENDED]

0
1. The authority citation for part 180 continues to read as follows:

    Authority: 21 U.S.C. 321(q), 346a and 371.

0
2. Section 180.464 is amended by alphabetically adding the following 
commodities to the table in paragraph (a) to read as follows:

Sec.  180.464  Dimethenamid; tolerances for residues.

    (a) * * *

------------------------------------------------------------------------
                      Commodity                        Parts per million
------------------------------------------------------------------------
                                * * * * *
Grass, forage........................................               0.15
Grass, hay...........................................                2.5
Grass, seed screenings...............................               0.01
Grass, straw.........................................               0.01
                                * * * * *
------------------------------------------------------------------------

* * * * *
[FR Doc. E7-15112 Filed 8-7-07; 8:45 am]

BILLING CODE 6560-50-S