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Fenbuconazole; Time-Limited Pesticide Tolerance

Note: EPA no longer updates this information, but it may be useful as a reference or resource.


 
[Federal Register: March 9, 2005 (Volume 70, Number 45)]
[Rules and Regulations]
[Page 11572-11583]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr09mr05-13]

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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[OPP-2004-0410; FRL-7699-2]

Fenbuconazole; Time-Limited Pesticide Tolerance

AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.

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SUMMARY: This regulation establishes a time-limited tolerance for the
combined residues of fenbuconazole [alpha-[2-(4-chlorophenyl)-ethyl]-
alpha-phenyl-3-(1H-1,2,4-triazole)-1-propanenitrile] and its
metabolites cis- andtrans-5-(4-chlorophenyl)-dihydro-3-phenyl-3-(1H-
1,2,4-triazole-1-ylmethyl)-2-3H-furanone, expressed as fenbuconazole in
or on bananas (whole fruit); pecans; and stone fruit crop group (except
plums and prunes). Dow AgroSciences, LLC requested this tolerance under
the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the
Food Quality Protection Act of 1996 (FQPA). The tolerance will expire
on December 31, 2008.

DATES: This regulation is effective March 9, 2005. Objections and
requests for hearings must be received on or before May 9, 2005.

ADDRESSES: To submit a written objection or hearing request follow the
detailed instructions as provided in Unit VI. of theSUPPLEMENTARY
INFORMATION. EPA has established a docket for this action under docket
identification (ID) number OPP-2004-0410. All documents in the docket
are listed in the EDOCKET index at http://www.epa.gov/edocket. Although
listed in the index, some information is not publicly available, i.e.,
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 either electronically
in EDOCKET or in hard copy at the Public Information and Records
Integrity Branch (PIRIB), Rm. 119, Crystal Mall #2, 1801 S.
Bell St., Arlington, VA. This docket facility is open from 8:30 a.m. to
4 p.m., Monday through Friday, excluding legal holidays. The docket
telephone number is (703) 305-5805.

FOR FURTHER INFORMATION CONTACT: J. R. Tomerlin, Registration Division
(0705C), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone
number: (703) 305-0598; e-mail address: tomerlin.bob@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:
     Crop production (NAICS code 111)
     Animal production (NAICS code 112)
     Food manufacturing (NAICS code 311)
     Pesticide manufacturing (NAICS code 32532)
    This listing is not intended to be exhaustive, but rather provides
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 underFOR FURTHER INFORMATION CONTACT.

 B. How Can I Access Electronic Copies of this Document and Other
Related Information?

    In addition to using EDOCKET (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/. A frequently updated electronic version of 40 CFR part 180
is available at E-CFR Beta Site Two at http://www.gpoaccess.gov/ecfr/ 
Exit Disclaimer. To access the OPPTS Harmonized Guidelines referenced in this 
document, go directly to the guidelines at
http://www.epa.gov/opptsfrs/home/guidelin.htm.

II. Background and Statutory Findings

    In the Federal Register of November 17, 2004 (69 FR 67351) (FRL-
7686-6), EPA issued a notice pursuant to section 408(d)(3) of the
FFDCA, 21 U.S.C. 346a(d)(3), announcing the filing of pesticide
petitions (PP 1F3989, 1F3995, and 2F4154) by Dow AgroSciences, LLC,
9330 Zionsville Road, Indianapolis, IN 46268. The petitions requested
that 40 CFR 180.480 be amended by establishing a tolerance for combined
residues of the fungicide fenbuconazole [alpha-[2-(4-chlorophenyl)-
ethyl]-alpha-phenyl-3-(1H-1,2,4-triazole)-1-propanenitrile] and its
metabolites cis- andtrans-5-(4-chlorophenyl)-dihydro-3-phenyl-3-(1H-
1,2,4-triazole-1-ylmethyl)-2-3H-furanone, in or on banana (whole fruit)
at 0.3 parts per million (ppm) (2F4154); fruit, stone, group 12 (except
plum, prune) at 2.0 ppm (1F3989); pecan at 0.1 ppm (1F3995). This
notice included a summary of the petition prepared by Dow AgroSciences,
LLC, the registrant.
    The tolerances will expire on December 31, 2008.
    Comments were received in response to the notice of filing from one
individual. These comments are addressed in Unit IV.C.
    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

[[Page 11573]]

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. . . .''
    EPA performs a number of analyses to determine the risks from
aggregate exposure to pesticide residues. For further discussion of the
regulatory requirements of section 408 of the FFDCA and a complete
description of the risk assessment process, see the final rule on
Bifenthrin Pesticide Tolerances (62 FR 62961, November 26, 1997) (FRL-
5754-7).

III. Aggregate Risk Assessment and Determination of Safety

    Consistent with section 408(b)(2)(D) of the FFDCA, 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, consistent with section
408(b)(2) of the FFDCA, for a tolerance for combined residues of banana
(whole fruit) at 0.3 parts per million (ppm); fruit, stone, group 12
(except plum, prune) at 2.0 ppm; pecan at 0.1 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. The nature of the toxic effects caused by fenbuconazole are
discussed in Table 1 of this unit as well as the no observed adverse
effect level (NOAEL) and the lowest observed adverse effect level
(LOAEL) from the toxicity studies reviewed.

                               Table 1.-- Subchronic, Chronic, and Other Toxicity
----------------------------------------------------------------------------------------------------------------
             Guideline No.                       Study Type                            Results
----------------------------------------------------------------------------------------------------------------
870.3100                                 90-Day oral toxicity        NOAEL = 1.3/1.5 mg/kg/day (M/F)
                                          rodents - rats             LOAEL = 5.1/6.3 mg/kg/day (M/F) based on
                                                                      liver histopathology
----------------------------------------------------------------------------------------------------------------
870.3100                                 90-Day oral toxicity        NOAEL = 3.8/5.7 mg/kg/day (M/F)
                                          rodents - mice             LOAEL = 11.1/17.6 mg/kg/day (M/F) based on
                                                                      liver histopathology
----------------------------------------------------------------------------------------------------------------
870.3150                                 90-Day oral toxicity in     NOAEL = 3.3/3.5 mg/kg/day (M/F)
                                          nonrodents - dogs          LOAEL = 13.3/14.0 mg/kg/day (M/F) based on
                                                                      liver histopathology
----------------------------------------------------------------------------------------------------------------
870.3200                                 21/28-Day dermal toxicity - NOAEL = 1,000 mg/kg/day (HDT)
                                           rats                      LOAEL = > 1,000 mg/kg/day
----------------------------------------------------------------------------------------------------------------
870.3250                                 90-Day dermal toxicity      Not performed
----------------------------------------------------------------------------------------------------------------
870.3465                                 90-Day inhalation toxicity  Not performed
----------------------------------------------------------------------------------------------------------------
870.3700                                 Prenatal developmental in   Maternal NOAEL = 30 mg/kg/day
                                          rodents - rats             Maternal LOAEL = 75 mg/kg/day based on
                                                                      decreased body weight and body weight gain
                                                                     Developmental NOAEL = 30 mg/kg/day
                                                                     Developmental LOAEL = 75 mg/kg/day based on
                                                                      increased post-implantation loss and a
                                                                      decrease in the number of live fetuses/dam
----------------------------------------------------------------------------------------------------------------
870.3700                                 Prenatal developmental in   Maternal NOAEL = 10 mg/kg/day
                                          nonrodents - rabbits       Maternal LOAEL = 30 mg/kg/day based on
                                                                      decreased food consumption and increased
                                                                      incidence of clinical signs (soft/scant/no
                                                                      feces and red discharge)
                                                                     Developmental NOAEL = 30 mg/kg/day
                                                                     Developmental LOAEL = 60 mg/kg/day based on
                                                                      increased early resorptions
----------------------------------------------------------------------------------------------------------------
870.3800                                 Reproduction and fertility  Parental systemic NOAEL = 4 mg/kg/day
                                          effects - rats             Parental systemic LOAEL = 40 mg/kg/day
                                                                      based on maternal death during delivery,
                                                                      decreased body weight and food
                                                                      consumption, increased number of dams not
                                                                      delivering viable or delivering nonviable
                                                                      offspring, and increased adrenal and
                                                                      thyroid/parathyroid weights
                                                                     Reproductive NOAEL = 40 mg/kg/day (HDT)
                                                                     Reproductive LOAEL = greater than 40 mg/kg/
                                                                      day
                                                                     Offspring systemic NOAEL: 4 mg/kg/day
                                                                     Offspring systemic LOAEL: 40 mg/kg/day
                                                                      based on decreased pup body weight,
                                                                      increased number of stillborn pups,
                                                                      decreased number of total offspring
                                                                      delivered and decreased viability indes
----------------------------------------------------------------------------------------------------------------
870.4100                                 Chronic toxicity - rodents  Requirements met by submission of studies
                                                                      according to OPPTS Harmonized Guideline
                                                                      870.4300
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[[Page 11574]]

870.4100                                 Chronic toxicity - dogs     NOAEL = 3.75/0.38 mg/kg/day (M/F)
                                                                     LOAEL = 30/3.75 mg/kg/day (M/F) based on
                                                                      decreased body weight gain
                                                                     Note: Dose-related adaptive liver changes
                                                                      were observed in high-dose males and
                                                                      females
----------------------------------------------------------------------------------------------------------------
870.4200                                 Carcinogenicity - rats      Requirements met by submission of studies
                                                                      according to OPPTS Harmonized Guideline
                                                                      870.4300
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870.4200                                 Carcinogenicity - mice      NOAEL = 1.43 mg/kg/day (both M and F)
                                                                     LOAEL = 28.6/92.9 mg/kg/day (M/F) based on
                                                                      decreased body weight, increased relative
                                                                      and absolute liver weight, and
                                                                      hepatocellular hypertrophy and
                                                                      vacuolization
                                                                     Evidence of carcinogenicity
----------------------------------------------------------------------------------------------------------------
870.4300                                 Combined chronic toxicity/  NOAEL = 3.0/4.0 mg/kg/day (M/F)
                                          carcinogenicity - rat      LOAEL = 30.6/43.1 mg/kg/day (M/F) based on
                                                                      decreased body weight gain (F),
                                                                      hepatocellular enlargement and
                                                                      vacuolization (F), increased thyroid
                                                                      weight (M and F), and histopathological
                                                                      lesions in the thyroid gland (M)
                                                                     Evidence of carcinogenicity
----------------------------------------------------------------------------------------------------------------
870.4300                                 Combined chronic toxicity/  NOAEL = Not established
                                          carcinogenicity - rat      LOAEL = 30.4 mg/kg/day (M) based on
                                                                      decreased body weight gain, increased
                                                                      liver weight, and increased thyroid and
                                                                      parathyroid weights
                                                                     Note: Only males were used in this study.
                                                                      Insufficient evidence of carcinogenicity
----------------------------------------------------------------------------------------------------------------
870.5100                                 Gene mutation - bacterial   No mutagenic activity in bacteria
                                          reverse mutation assay      (Salmonella typhimurium) under conditions
                                                                      of this assay.
                                                                     Note: Only TA1535, TA1537, TA98, and TA100
                                                                      were tested. This study is classified
                                                                      unacceptable.
----------------------------------------------------------------------------------------------------------------
870.5100                                 Gene mutation - bacterial   No mutagenic activity in bacteria
                                          reverse mutation assay      (Salmonella typhimurium) under conditions
                                                                      of this assay.
                                                                     Note: Only TA1535, TA1537, TA98, and TA100
                                                                      were tested. This study is classified
                                                                      unacceptable.
----------------------------------------------------------------------------------------------------------------
870.5300                                 Cytogenetics -  in vitro    No increase in mutant frequency at the
                                          mammalian cell gene         HGPRT locus, in the presence or absence of
                                          mutation test (CHO Cells)   S9 activation.
----------------------------------------------------------------------------------------------------------------
870.5385                                 Cytogenetics - mammalian    No increase in number of cells with
                                          bone marrow chromosomal     aberrations or in aberrations per cell.
                                          aberration test (rats)
----------------------------------------------------------------------------------------------------------------
870.5550                                 Other effects -             No evidence (or a dose related positive
                                          unscheduled DNA synthesis   response) that unscheduled DNA synthesis
                                          in mammalian cells in       was induced.
                                          culture (rats)
----------------------------------------------------------------------------------------------------------------
870.7485                                 Metabolism and              The mean recovery of radioactivity 4 days
                                          pharmacokinetics - rat      after exposure was 82.6-93.0% following
                                                                      single or repeated oral doses and 88.2-
                                                                      99.2% following single i.v. doses,
                                                                      indicating rapid absorption, distribution,
                                                                      and elimination. Rapid elimination and low
                                                                      tissue levels indicate low bioaccumulation
                                                                      of the parent and metabolites.
                                                                     Elimination occurred primarily by biliary
                                                                      excretion because recovery of
                                                                      radioactivity was mostly in the feces:
                                                                      75.6-83.7% following oral exposure and
                                                                      77.2-91.4% following i.v. exposure. In
                                                                      urine, radioactivity recovery was 5.5-
                                                                      12.6% for all dose scenarios. Peak
                                                                      radioactivity in the blood occurred 3
                                                                      hours following a single low dose and 3-6
                                                                      hours after a single high dose, indicating
                                                                      biphasic elimination.
                                                                     Only 8.5-14.8% and 0.0-2.7% of the parent
                                                                      compound was recovered in the feces and
                                                                      urine, respectively, indicating extensive
                                                                      metabolism. A number of major metabolites
                                                                      were identified; however, 50% and 20% of
                                                                      metabolites in the feces and urine,
                                                                      respectively, were not identified. Sex-
                                                                      related differences include a greater
                                                                      number of sulfate metabolites in female
                                                                      excreta compared to males, and a greater
                                                                      number of ketoacid metabolites in male
                                                                      urine compared to females.
----------------------------------------------------------------------------------------------------------------

[[Page 11575]]

870.7485                                 Metabolism and              The mean recovery of radioactivity 3-4 days
                                          pharmacokinetics - rat      after exposure was 90.4-104.5% following
                                                                      single or repeated oral doses, indicating
                                                                      rapid absorption, distribution, and
                                                                      elimination. Bioaccumulation of the parent
                                                                      compound and metabolites is low. There
                                                                      were no major sex- or dose-related
                                                                      differences in absorption, distribution,
                                                                      or elimination.
                                                                     Elimination occurred primarily by biliary
                                                                      excretion: Recovery of the administered
                                                                      dose occurred mainly in the bile (79.1-
                                                                      87.1%) 3 days after exposure and mostly in
                                                                      the feces (78.7-94.4%) 4 days after
                                                                      exposure. In contrast, radioactivity
                                                                      recovery in the urine was 3.2-11.5% at 3
                                                                      and 4 days after exposure.
                                                                     Extensive metabolism occurred; numerous
                                                                      metabolites were found in the feces and
                                                                      urine. There is a dose-related difference
                                                                      in metabolism. A higher amount of parent
                                                                      compound was found in the feces following
                                                                      the single high dose compared to the
                                                                      single or repeated low dose(s), which
                                                                      suggests that saturation may be occurring
                                                                      at the high dose.
----------------------------------------------------------------------------------------------------------------
870.7600                                 Dermal penetration - rat    The highest dermal absorption was found in
                                                                      animals having the longest exposure dose.
                                                                     Mean % of the dose absorbed (sum of urine,
                                                                      feces, carcass, and skin) after 10 hours
                                                                      of exposure:
                                                                     Dose (mg/kg) Percent Dermal Absorption
                                                                     0.125 4.25
                                                                     1.25 2.08
                                                                     125 0.45
----------------------------------------------------------------------------------------------------------------

B. Toxicological Endpoints

    The dose at which no adverse effects are observed (the NOAEL) from
the toxicology study identified as appropriate for use in risk
assessment is used to estimate the toxicological level of concern
(LOC). However, the lowest dose at which adverse effects of concern are
identified (the LOAEL) is sometimes used for risk assessment if no
NOAEL was achieved in the toxicology study selected. An uncertainty
factor (UF) is applied to reflect 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. An UF of 100 is routinely used, 10X to account for
interspecies differences and 10X for intraspecies differences.
    For dietary risk assessment (other than cancer) the Agency uses the
UF to calculate an acute or chronic reference dose (acute RfD or
chronic RfD) where the RfD is equal to the NOAEL divided by the
appropriate UF (RfD = NOAEL/UF). Where an additional safety factor is
retained due to concerns unique to the FQPA, this additional factor is
applied to the RfD by dividing the RfD by such additional factor. The
acute or chronic Population Adjusted Dose (aPAD or cPAD) is a modification 
of the RfD to accommodate this type of FQPA Safety Factor (SF).
    For non-dietary risk assessments (other than cancer) the UF is used
to determine the LOC. For example, when 100 is the appropriate UF (10X
to account for interspecies differences and 10X for intraspecies
differences) the LOC is 100. To estimate risk, a ratio of the NOAEL to
exposures (margin of exposure (MOE) = NOAEL/exposure) is calculated and
compared to the LOC.
    The linear default risk methodology (Q*) is the primary method
currently used by the Agency to quantify carcinogenic risk. The Q*
approach assumes that any amount of exposure will lead to some degree
of cancer risk. A Q* is calculated and used to estimate risk which
represents a probability of occurrence of additional cancer cases
(e.g., risk is expressed as1 x 10-\6\ or one in a million).
Under certain specific circumstances, MOE calculations will be used for
the carcinogenic risk assessment. In this non-linear approach, a
``point of departure'' is identified below which carcinogenic effects
are not expected. The point of departure is typically a NOAEL based on
an endpoint related to cancer effects though it may be a different
value derived from the dose response curve. To estimate risk, a ratio
of the point of departure to exposure(MOEcancer = point of
departure/exposures) is calculated. A summary of the toxicological
endpoints for fenbuconazole used for human risk assessment is shown in
Table 2 of this unit:

    Table 2.--Summary of Toxicological Dose and Endpoints for Fenbuconaozle for Use in Human Risk Assessment
----------------------------------------------------------------------------------------------------------------
                                                                  Special FQPA SF* and
          Exposure Scenario               Dose Used in Risk       Level of Concern for   Study and Toxicological
                                            Assessment, UF          Risk Assessment              Effects
----------------------------------------------------------------------------------------------------------------
Acute dietary (females 13-49 years of  NOAEL = 30 mg/kg/day     Special FQPA SF = 1      Developmental rat study
 age)                                  UF = 100a..............   aPAD = acute RfD /      Developmental LOAEL =
                                       Acute RfD = 0.3 mg/kg..   FQPA SF = 0.3 mg/kg      75 mg/kg/day based on
                                                                                          increased resorptions
                                                                                          and decreased live
                                                                                          fetuses per dam
----------------------------------------------------------------------------------------------------------------

[[Page 11576]]

Acute dietary (general population      None                     None                     Not selected
 including infants and children)                                                         No appropriate dose and
                                                                                          endpoint could be
                                                                                          identified for these
                                                                                          population groups.
----------------------------------------------------------------------------------------------------------------
Chronic dietary (all populations)      NOAEL = 3 mg/kg/day      Special FQPA SF = 1      Combined chronic
                                       UF = 100a..............  cPAD = chronic RfD /      toxicity/
                                       Chronic RfD = 0.03 mg/    FQPA SF = 0.03 mg/kg/    carcinogenicity - rat
                                        kg/day.                  day.                    LOAEL = 30.6/43.1 (M/F)
                                                                                          mg/kg/day based on
                                                                                          decreased body weight
                                                                                          gain, increased
                                                                                          thyroid weight, and
                                                                                          histopathological
                                                                                          lesions in the liver
                                                                                          and thyroid gland
----------------------------------------------------------------------------------------------------------------
Incidental oral (all durations)        None                     None                     Not selected
                                                                                         No registered uses
                                                                                          would result in
                                                                                          residential exposure
-----------------------------------------------------------------------------------------
Short-term (1 to 30 days) and          None                     None                     Not selected
 intermediate-term (1 to 6 months)                                                       No dermal or systemic
Dermal...............................                                                     toxicity was seen in a
                                                                                          21-day dermal toxicity
                                                                                          study; poor absorption
                                                                                          was seen in the dermal
                                                                                          absorption study
-----------------------------------------------------------------------------------------
Long-term dermal (several months to    Oral study NOAEL = 3 mg/ Residential LOC for MOE  Combined chronic
 lifetime)                              kg/day                   = Not applicable         toxicity/
                                       (dermal absorption rate  Occupational LOC for      carcinogenicity - rat
                                        = 4.25%).                MOE = 100\a\.           LOAEL = 30.6/43.1 (M/F)
                                                                                          mg/kg/day based on
                                                                                          decreased body weight
                                                                                          gain, increased
                                                                                          thyroid weight, and
                                                                                          histopathological
                                                                                          lesions in the liver
                                                                                          and thyroid gland
-----------------------------------------------------------------------------------------
Inhalation (all durations)             None                     None                     Not selected
                                                                                         Low toxicity and use
                                                                                          pattern does not
                                                                                          indicate a need for
                                                                                          risk assessment via
                                                                                          inhalation.
-----------------------------------------------------------------------------------------
Cancer (oral, dermal, inhalation)             Classification: Under the 1986 cancer classification scheme,
                                         fenbuconazole was classified as a Group C - Possible Human Carcinogen,
                                         with a low dose extrapolation model applied to the animal data for the
                                             quantification of human risk (Q1*). This was based on increased
                                         incidence of hepatocellular adenomas and carcinomas in male and female
                                        mice and of thyroid follicular adenomas and combined adenomas/carcinomas
                                           in male rats. Based on mechanistic data, quantification of risk was
                                           derived using combined hepatocellular adenomas/carcinomas in female
                                        mice. The upper bound estimate of unit risk, Q1* (mg/kg/day)-\1\ is 3.59
                                                             x 10-\3\ in human equivalents.
----------------------------------------------------------------------------------------------------------------
*Database uncertainty factor reduced to 1X.

C. Exposure Assessment

    1. Dietary exposure from food and feed uses. Tolerances have been
established (40 CFR 180.480) for the combined residues of
fenbuconazole, in or on a variety of raw agricultural commodities. Risk
assessments were conducted by EPA to assess dietary exposures from
fenbuconazole in food as follows:
     i. Acute exposure. Acute dietary 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. The Dietary Exposure Evaluation Model (DEEM\TM\)
analysis evaluated the individual food consumption as reported by
respondents in the U.S. Department of Agriculture (USDA) 1994-1996 and
1998 Nationwide Continuing Surveys of Food Intake by Individuals
(CSFII) and accumulated exposure to the chemical for each commodity.
The following assumptions were made for the acute exposure assessments:
Tolerance level residues were used for all food commodities, 100% of
all commodities were assumed to be treated, and default processing
factors were used for processed commodities.
     ii. Chronic exposure. In conducting this chronic dietary risk
assessment, the DEEM\TM\ analysis evaluated the food consumption as
reported by respondents in the USDA 1994-1996 and 1998 CSFII and
accumulated exposure to the chemical for each commodity. The following
assumptions were made for the chronic exposure assessments: The chronic
analysis is slightly refined in that it incorporates estimates of
average percent crop treated (PCT), although it does use tolerance
value residues for most commodities and default processing factors.
Anticipated residues from USDA Pesticide Data Program monitoring data
were used only for banana in the chronic dietary exposure analysis and
risk assessment.
    iii. Cancer. Chronic cancer risk for the overall U.S. population
was estimated by multiplying the chronic exposure

[[Page 11577]]

estimate by the carcinogenic potential (Q*) of 0.0359 (mg/kg/day)-\1\.
    Section 408(b)(2)(E) of the FFDCA authorizes EPA to use available
data and information on the anticipated residue levels of pesticide
residues in food and the actual levels of pesticide chemicals that have
been measured in food. If EPA relies on such information, EPA must
require that data be provided 5 years after the tolerance is
established, modified, or left in effect, demonstrating that the levels
in food are not above the levels anticipated. Following the initial
data submission, EPA is authorized to require similar data on a time
frame it deems appropriate. As required by section 408(b)(2)(E) of the
FFDCA, EPA will issue a Data Call-In for information relating to
anticipated residues to be submitted no later than 5 years from the
date of issuance of this tolerance.
    Section 408(b)(2)(F) of the FFDCA states that the Agency may use
data on the actual percent of food treated for assessing chronic
dietary risk only if the Agency can make the following findings:
Condition 1, that the data used are reliable and provide a valid basis
to show what percentage of the food derived from such crop is likely to
contain such pesticide residue; Condition 2, that the exposure estimate
does not underestimate exposure for any significant subpopulation
group; and Condition 3, if data are available on pesticide use and food
consumption in a particular area, the exposure estimate does not
understate exposure for the population in such area. In addition, the
Agency must provide for periodic evaluation of any estimates used. To
provide for the periodic evaluation of the estimate of percent crop
treated (PCT) as required by section 408(b)(2)(F) of the FFDCA, EPA may
require registrants to submit data on PCT.
    The Agency used PCT information as follows:
    A routine chronic dietary exposure analysis for the fungicide
fenbuconazole and itscis and trans metabolites was based on 10% of
apricot crop treated, 25% of blueberry crop treated, 25% of cherry crop
treated, 30% of grapefruit crop treated, 15% of nectarine crop treated,
15% of peach crop treated, and 10% of pecan crop treated.
    The Agency believes that the three conditions previously discussed
have been met. With respect to Condition 1, EPA finds that the PCT
information for fenbuconazole is reliable and has a valid basis. Time-
limited tolerances have existed for all crop commodities included in
the risk assessment, and the Agency obtained estimates of fenbuconazole
use from recognized pesticide use data bases. As to Conditions 2 and 3,
regional consumption information and consumption information for
significant subpopulations is taken into account through EPA's
computer-based model for evaluating the exposure of significant
subpopulations including several regional groups. Use of this
consumption information in EPA's risk assessment process ensures that
EPA's exposure estimate does not understate exposure for any
significant subpopulation group and allows the Agency to be reasonably
certain that no regional population is exposed to residue levels higher
than those estimated by the Agency. Other than the data available
through national food consumption surveys, EPA does not have available
information on the regional consumption of food to which fenbuconazole
may be applied in a particular area.
    2. Dietary exposure from drinking water. The Agency lacks
sufficient monitoring exposure data to complete a comprehensive dietary
exposure analysis and risk assessment for fenbuconazole 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 physical
characteristics of fenbuconazole.
    The Agency uses the Generic Estimated Environmental Concentration
(GENEEC) or the Pesticide Root Zone/Exposure Analysis Modeling System
(PRZM/EXAMS) to estimate pesticide concentrations in surface water and
SCI-GROW, which predicts pesticide concentrations in ground water. In
general, EPA will use GENEEC (a Tier 1 model) before using PRZM/EXAMS
(a Tier 2 model) for a screening-level assessment for surface water.
The GENEEC model is a subset of the PRZM/EXAMS model that uses a
specific high-end runoff scenario for pesticides. GENEEC incorporates a
farm pond scenario, while PRZM/EXAMS incorporate an index reservoir
environment in place of the previous pond scenario. The PRZM/EXAMS
model includes a percent crop area factor as an adjustment to account
for the maximum percent crop coverage within a watershed or drainage basin.
    None of these models include consideration of the impact processing
(mixing, dilution, or treatment) of raw water for distribution as
drinking water would likely have on the removal of pesticides from the
source water. The primary use of these models by the Agency at this
stage is to provide a coarse screen for sorting out pesticides for
which it is highly unlikely that drinking water concentrations would
ever exceed human health levels of concern.
    Since the models used are considered to be screening tools in the
risk assessment process, the Agency does not use estimated
environmental concentrations (EECs) from these models to quantify
drinking water exposure and risk as a %RfD or %PAD. Instead drinking
water levels of comparisons (DWLOCs) are calculated and used as a point
of comparison against the model estimates of a pesticide's
concentration in water. DWLOCs are theoretical upper limits on a
pesticide's concentration in drinking water in light of total aggregate
exposure to a pesticide in food, and from residential uses. Since
DWLOCs address total aggregate exposure to fenbuconaozle, they are
further discussed in the aggregate risk sections in Unit III.E.
    Based on the PRZM/EXAMS and SCI-GROW models, the estimated EECs of
fenbuconazole for acute exposures are estimated to be 14.1 parts per
billion (ppb) for surface water and 0.005 ppb for ground water. The
EECs for chronic exposures are estimated to be 7.3 ppb (peak annual)
and 5.9 ppb (30-year average) for surface water and 0.005 ppb for
ground 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).
    Fenbuconazole is not registered for use on any sites that would
result in residential exposure.
    4. Cumulative exposure to substances with a common mechanism of
toxicity. 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, fenbuconazole
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 fenbuconazole 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

[[Page 11578]]

the cumulative effects of such chemicals, see the final rule for
Bifenthrin Pesticide Tolerances (62 FR 62961, November 26, 1997) (FRL-
5754-7).
    However, the Agency does have concern about potential toxicity to
1,2,4-triazole and two conjugates, triazolylalanine and triazolyl
acetic acid, metabolites common to most of the triazole fungicides. To
support the extension of existing parent triazole-derivative fungicide
tolerances, EPA conducted an interim human health assessment for
aggregate exposure to 1,2,4-triazole. The exposure and risk estimates
presented in this assessment are overestimates of actual likely
exposures and therefore, should be considered to be highly
conservative. Based on this assessment, EPA concluded that for all
exposure durations and population subgroups, aggregate exposures to
1,2,4-triazole are not expected to exceed its level of concern. This
assessment should be considered interim due to the ongoing series of
studies being conducted by the U.S. Triazole Task Force (USTTF). Those
studies are designed to provide the Agency with more complete
toxicological and residue information for free triazole and are
expected to be submitted to the Agency in late 2004 and early 2005.
Upon completion of review of these data, EPA will prepare a more
sophisticated assessment based on the revised toxicological and
exposure data bases.
    i. Toxicology. The toxicological data base for 1,2,4-triazole is
incomplete. Preliminary summary data presented by the USTTF to EPA
indicate that the most conservative endpoint currently available for
use in a risk assessment for 1,2,4-triazole is a LOAEL of 15 mg/kg/day,
based on body weight decreases in male rats in the reproductive
toxicity study (currently underway). This endpoint, with an uncertainty
factor of 1,000 was used for both acute and chronic dietary risk,
resulting in an RfD of 0.015 mg/kg/day. The uncertainty factor of 1,000
includes an additional 10X safety factor for the protection of infants
and children. The resulting PAD is 0.015 mg/kg/day.
    ii. Dietary exposure. The USTTF conducted an acute dietary exposure
assessment based on the highest triazole-derivative fungicide tolerance
level combined with worst-case molecular weight and plant/livestock
metabolic conversion factors. This approach provides a conservative
estimate of all sources for 1,2,4-triazole except the in vivo
conversion of parent compounds to free-triazole following dietary
exposure. The degree of animal in vivo conversion is dependent on the
identity of the parent fungicide. In rats, this conversion ranges from
0% to 77%, thein vivo conversion for fenbuconaozle is 2.5%. For
purposes of this interim assessment, EPA used the dietary exposure
estimates provided by the USTTF adjusted based on the highest rate of
conversion observed for any of the parent triazole-derivative
fungicides to account for this metabolic conversion. The assessment
includes residue estimates for all food commodities with either
existing or pending triazole-derivative fungicide registrations. The
resulting acute dietary exposure estimates are extremely conservative
and range from 0.0032 mg/kg/day for males 20+ years old to 0.014 mg/kg/
day for children 1 to 6 years old. Estimated risks range from 22% to
93% of the PAD. In order to estimate chronic exposures via food, EPA
used the 70th percentile of exposures from the acute assessment. The
70th percentile is a common statistic used to estimate central tendency
from a distribution and its use to estimate chronic exposures is
appropriate. Estimated risks range from 10% to 47% of the PAD. It is
emphasized that the use of both highest tolerance level residues and
the highest in vivo conversion factor results in dietary risk estimates
that far exceed the likely actual risk.
    iii. Non-dietary exposure. Triazole-derivative fungicides are
registered for use on turf, resulting in the potential for residues of
free triazole in grass and/or soil. Thus dermal and incidental oral
exposures to children may occur. It is believed that residues of free
triazole occur within the plant matrices and are not available as
surface residues. Therefore, direct dermal exposure to 1,2,4-triazole
due to contact with plants is not likely to occur. However, dermal
exposure to parent fungicide and subsequent in vivo conversion to
1,2,4-triazole may occur. In order to account for this indirect
exposure to free triazole, EPA used a conversion factor of 10%, which
is the highest rate of  in vivo conversion observed in rats for any of
the triazole-derivative fungicides with registrations on turf.
Incidental oral exposure may occur by direct and indirect routes. To
assess direct exposure, EPA used a conversion factor of 17%, which is
the highest rate of conversion to free triazole observed in any of the
plant metabolism studies. As with indirect dermal exposure, EPA used a
conversion factor of 10% in its assessment of indirect oral exposure.
Based on residential exposure values estimated for propiconazole
(0.0005 mg/kg/day via the dermal route and 0.03 mg/kg/day via the oral
route) and the conversion factors described above, combined direct and
indirect dermal exposures are estimated to be less than 0.0001 mg/kg/
day and combined oral exposures are estimated to be less than 0.0019
mg/kg/day. The overall residential exposure is likely to be less than
0.0020 mg/kg/day. Relative to the 15 mg/kg/day point of departure, this
gives an MOE of approximately 7,500 for children. Based on the current
set of uncertainty factors, the target MOE is 1,000, indicating that
the risk associated with residential exposure to 1,2,4-triazole for
children is below EPA's level of concern. The adult dermal exposure
estimate is slightly less than that of children. Incidental oral
exposure is not expected to occur with adults.
    iv. Drinking water. Modeled estimates of 1,2,4-triazole residues in
surface water and ground water, as reported by the USTTF, and the DWLOC
approach were used to address exposure to free triazole in drinking
water. EECs of free triazole in ground water were obtained from the
SCI-GROW model and range from 0.0 to 0.026 ppb, with the higher
concentrations associated with uses on turf. Surface water EECs were
obtained using the FIRST model. Acute surface water EECs ranged from
0.29 to 4.64 ppb for agricultural uses and up to 32.1 ppb from use on
golf course turf. EPA notes that ground water monitoring studies in New
Jersey and California showed maximum residues of 16.7 and 0.46 ppb,
respectively, which exceed the SCI-GROW estimates significantly.
Contrariwise, preliminary monitoring data from USDA's Pesticide Data
Program for 2004 show no detectable residues of 1,2,4-triazole in any
drinking water samples, either treated or untreated (maximum LOD = 0.73
ppb, n = 40 each).
    v. Aggregate exposure. In estimating aggregate exposure, EPA
combined potential dietary and non-dietary sources of 1,2,4-triazole.
To account for the drinking water component of dietary exposure, EPA
used the DWLOC approach, as noted above. The DWLOC represents a maximum
concentration of a chemical in drinking water at or below which
aggregate exposure will not exceed EPA's level of concern. In
considering non-dietary exposure, EPA used the residential exposure
estimate for children and applied it to all population subgroups. As
previously noted, this estimate is considered to be highly conservative
for children. Since adults are not expected to have non-dietary oral
exposure to 1,2,4-triazole and that pathway makes up the majority of
the residential exposure estimate for

[[Page 11579]]

children, application of that exposure estimate to adults is considered
to be extremely conservative. Residential exposure is expected to occur
for short-term and/or intermediate-term durations, and therefore is not
a component in the acute or chronic aggregate exposure assessment. In
order to assess aggregate short-term and intermediate-term exposure,
EPA combined the residential exposure estimate and the background level
of exposure to free triazole via food. Less than 1% of lawns in the
U.S. are expected to be treated with triazole fungicides, so the
likelihood of co-occurring dietary and residential exposures is very low.
    With the exception of the acute DWLOCs for infants and children 1-6
years, all DWLOCs are greater than the largest EEC (surface water
estimate from use on turf), indicating that aggregate exposures are not
likely to exceed EPA's level of concern. Although the acute DWLOCs for
infants and children 1-6 years indicate that aggregate exposure may
exceed the aPAD of 0.015 mg/kg/day, EPA does not believe this to be the
case due to the extremely conservative nature of the overall assessment
(highest-tolerance level residues, 100% crop treated, 77% in vivo
conversion factor). Furthermore, the drinking water monitoring data
from the Pesticide Data Program found no detectable residues of either
free triazole or parent triazole-derivative fungicide in its
preliminary 2004 dataset, indicating that neither parent compounds nor
1,2,4-triazole are likely to occur in drinking water. For all exposure
durations and population subgroups, EPA does not expect aggregate
exposures to 1,2,4-triazole to exceed its level of concern.
    The Agency is planning to conduct a more sophisticated human health
assessment in early 2005 following submission and review of the ongoing
toxicology and residue chemistry studies for 1,2,4-triazole.

D. Safety Factor for Infants and Children

    1. In general. Section 408 of the FFDCA provides that EPA shall
apply an additional 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 data base on toxicity and exposure
unless EPA determines that a different margin of safety will be safe
for infants and children. Margins of safety are incorporated into EPA
risk assessments either directly through use of a MOE analysis or
through using uncertainty (safety) factors in calculating a dose level
that poses no appreciable risk to humans.
    2. Prenatal and postnatal sensitivity. There are no data gaps for
the assessment of the effects of fenbuconazole following in utero and/
or postnatal exposure; a developmental neurotoxicity study is not
required. There is no indication of quantitative or qualitative
increased susceptibility of rats or rabbits to in utero and/or
postnatal exposure to fenbuconazole.
    3. Conclusion. There is a complete toxicity data base for
fenbuconazole and exposure data are complete or are estimated based on
data that reasonably accounts for potential exposures. The FQPA Safety
Factor (SF) could be removed (i.e., reduced to 1X) in assessing the
risk posed by fenbuconazole for several reasons:
    (i) There are no data gaps for the assessment of the effects of
fenbuconazole following in utero and/or postnatal exposure; a
developmental neurotoxicity study is not required.
    (ii) There is no indication of quantitative or qualitative
increased susceptibility of rats or rabbits to in utero and/or
postnatal exposure to fenbuconazole.
    (iii) The dietary food exposure assessment utilizes conservative
assumptions (tolerance level residues) with respect to residues in
food. Although some %CT information was used for the chronic dietary
food exposure assessment, 100% CT was assumed for the acute assessment.
Together, these assumptions result in high-end estimates of dietary
exposure and risk.
    (iv) The dietary drinking water assessment (Tier 1 estimates)
utilizes values generated by model and associated modeling parameters
which are designed to provide conservative, health protective, high-end
estimates of water concentrations;
    (v) At this time, there are no registered residential uses for
fenbuconazole; therefore, this type of exposure to infants and children
is not expected.

E. Aggregate Risks and Determination of Safety

    To estimate total aggregate exposure to a pesticide from food,
drinking water, and residential uses, the Agency calculates DWLOCs
which are used as a point of comparison against the model estimates of
a pesticide's concentration in water (EECs). DWLOC values are not
regulatory standards for drinking water. DWLOCs are theoretical upper
limits on a pesticide's concentration in drinking water in light of
total aggregate exposure to a pesticide in food and residential uses.
In calculating a DWLOC, the Agency determines how much of the
acceptable exposure (i.e., the PAD) is available for exposure through
drinking water (e.g., allowable chronic water exposure (mg/kg/day) =
cPAD - (average food + residential exposure). This allowable exposure
through drinking water is used to calculate a DWLOC.
    A DWLOC will vary depending on the toxic endpoint, drinking water
consumption, and body weights. Default body weights and consumption
values as used by the USEPA Office of Water are used to calculate
DWLOCs: 2 Liter (L)/70 kg (adult male), 2L/60 kg (adult female), and
1L/10 kg (child). Default body weights and drinking water consumption
values vary on an individual basis. This variation will be taken into
account in more refined screening-level and quantitative drinking water
exposure assessments. Different populations will have different DWLOCs.
Generally, a DWLOC is calculated for each type of risk assessment used:
Acute, short-term, intermediate-term, chronic, and cancer.
    When EECs for surface water and ground water are less than the
calculated DWLOCs, EPA concludes with reasonable certainty that
exposures to the pesticide in drinking water (when considered along
with other sources of exposure for which EPA has reliable data) would
not result in unacceptable levels of aggregate human health risk at
this time. Because EPA considers the aggregate risk resulting from
multiple exposure pathways associated with a pesticide's uses, levels
of comparison in drinking water may vary as those uses change. If new
uses are added in the future, EPA will reassess the potential impacts
of residues of the pesticide in drinking water as a part of the
aggregate risk assessment process.
    1. Acute risk. Using the exposure assumptions discussed in this
unit for acute exposure, the acute dietary exposure from food to
fenbuconazole will occupy 0.9% of the aPAD for females 13 years and
older, the only population subgroup for which an acute endpoint was
identified. After calculating DWLOCs and comparing them to the EECs for
surface water and ground water, EPA does not expect the aggregate
exposure to exceed 100% of the aPAD, as shown in Table 3 of this unit:

[[Page 11580]]

                     Table 3.--Aggregate Risk Assessment for Acute Exposure to Fenbuconazole
----------------------------------------------------------------------------------------------------------------
                                                                             Surface       Ground
              Population Subgroup                 aPAD (mg/      % aPAD     Water EEC    Water EEC   Acute DWLOC
                                                     kg)         (Food)       (ppb)        (ppb)        (ppb)
----------------------------------------------------------------------------------------------------------------
Females 13 - 49 years old                                0.3          0.9         14.1        0.005        8,900
----------------------------------------------------------------------------------------------------------------

    2. Chronic risk. Using the exposure assumptions described in this
unit for chronic exposure, EPA has concluded that exposure to
fenbuconazole from food will utilize 0.3% of the cPAD for the U.S.
population, 1.3% of the cPAD for all infants, and 1.0% of the cPAD for
children 1 to 2 years old. There are no residential uses for
fenbuconazole that result in chronic residential exposure to
fenbuconazole. After calculating DWLOCs and comparing them to the EECs
for surface water and ground water, EPA does not expect the aggregate
exposure to exceed 100% of the cPAD, as shown in Table 4 of this unit:

             Table 4.-- Aggregate Risk Assessment for Chronic (Non-Cancer) Exposure to Fenbuconazole
----------------------------------------------------------------------------------------------------------------
                                                                             Surface       Ground
              Population Subgroup                cPAD mg/kg/     %cPAD      Water EEC    Water EEC     Chronic
                                                     day         (Food)       (ppb)        (ppb)     DWLOC (ppb)
----------------------------------------------------------------------------------------------------------------
U.S. population                                         0.03          0.3          7.3        0.005        1,000
----------------------------------------------------------------------------------------
All infants                                             0.03          1.3          7.3        0.005          300
----------------------------------------------------------------------------------------
Children 1 - 2 years old                                0.03          1.0          7.3        0.005          300
----------------------------------------------------------------------------------------------------------------

    3. Short-term risk. Short-term aggregate exposure takes into
account residential exposure plus chronic exposure to food and water
(considered to be a background exposure level).
    Fenbuconazole 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
level of concern.
    4. Intermediate-term risk. Intermediate-term aggregate exposure
takes into account residential exposure plus chronic exposure to food
and water (considered to be a background exposure level).
    Fenbuconazole 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
level of concern.
     5. Aggregate cancer risk for U.S. population. Based on the chronic
dietary (food) exposure and using default body weights and water
consumption figures, DWLOC for cancer risk were calculated. To
calculate the DWLOC, the chronic dietary food exposure for the overall
U.S. population was subtracted from the exposure required to achieve a
one in one million cancer risk (1 x 10-\6\). Under FFDCA
section 408, pesticides posing a negligible cancer risk can qualify as
meeting section 408's reasonable certainty of no harm safety standard.
EPA has traditionally interpreted a negligible cancer risk as a cancer
risk in the range of a one in one million risk. Risks as high as three
in one million have been regarded as in the range of one in one
million. A value of 1 x 10-\6\ was used in calculating the
DWLOC for fenbuconazole as a conservative, first-tier cancer risk
assessment. The exposure required to achieve negligible risk is
calculatedas 1 x 10-\6\ / Q1* 0.00359 (mg/kg/
day)-\1\. For cancer risk exposure, based on an adult body
weight of 70 kg and 2L consumption of water per day, the estimated
cancer DWLOC is 6.3 ppb for the U.S. population. EFED's 30-year average
EEC of 5.9 ppb is lower than the cancer DWLOCs for the U.S. population.
Therefore, the Agency concludes with reasonable certainty that, the
aggregate cancer risk for fenbuconazole does not exceed the negligible
risk standard (i.e., will not result in a cancer risk of greater than
the range of 1 x 10-\6\). The process is illustrated in Table 5.

               Table 5.--Aggregate Risk Assessment for Chronic (Cancer) Exposure to Fenbuconazole
----------------------------------------------------------------------------------------------------------------
                                                                                          Chronic
                                                  Negligible                 Surface       Ground      Chronic
              Population Subgroup                Exposure mg/ %PAD (Food)   Water EEC    Water EEC   DWLOC (ppb)
                                                    kg/day                    (ppb)        (ppb)
----------------------------------------------------------------------------------------------------------------
U.S. population                                     0.000279          0.3          5.9        0.005          6.3
----------------------------------------------------------------------------------------------------------------

    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, and to infants and children from aggregate
exposure to fenbuconazole residues.

IV. Other Considerations

A. Analytical Enforcement Methodology

    An adequate analytical method for fenbuconazole in or on plants was
submitted for inclusion in the Pesticide Analytical Manual Vol. 2 (PAM II).

B. International Residue Limits

    There are Codex maximum residues levels (MRLs) expressed as
fenbuconazole (fat-soluble) in milk, cattle meat, liver, kidney, and
fat, all at 0.05 ppm (limit of quantitation, LOQ). Since the MRLs
levels are based on different residue definitions and LOQs

[[Page 11581]]

than that of U.S. registrations, international harmonization is not 
feasible.

C. Response to Comments

    A commenter raised several objections to the extension of time-
limited tolerances for fenbuconzaole: (1) Complete data should be in
before any approval is given by EPA; further, the Agency should not
rely on limited evidence; (2) a 4-hour toxicity test is not a fair
amount of time to test anything; (3) testing conducted on animals has
absolutely no validity and is cruel to the test animals; and (4) the
DEEM\TM\ software is not suitable for evaluating risk.
    These points will be addressed in turn.
    1. Missing data/limited evidence. The commenter's mention of
limited evidence appears to be a reference to the cancer potential for
febuconazole. The carcinogenicity testing performed on fenbuconazole is
complete and meets Agency scientific standards; however, the results of
these tests are limited in that fenbuconazole does not appear to be a
strong carcinogen. This evidence was taken into account in EPA's risk
assessment and in making the safety determination. To the extent the
commenter is concerned with the fact that there is limited information
regarding 1,2,4-triazole, EPA would note that it more than compensated
for the data limitations with regard to that chemical by making
extremely conservative (i.e., health-protective) assumptions in
assessing its risk.
    2. 4-Hour toxicity test. The Agency does not agree that the
toxicity of pesticides can be judged by some undefined 4-hour toxicity
test. Testing requirements for pesticides have been developed over many
years following extensive review by the FIFRA Science Advisory Panel
and many other scientific experts and groups, as well as exhaustive
notice and comment rulemaking procedures. This comment is frivolous.
    3. Animal testing. This commenter's objections to animal testing
have been addressed in prior rulemaking documents. See 69 FR 63083,
October 29, 2004.
    4. DEEM\TM\ software. The commenter provides no basis for claiming
that the DEEM\TM\ is unsuitable for risk assessment. For this reason
alone, the comment is insignificant. EPA would note, however, that the
DEEM\TM\ software has been thoroughly tested by the Agency and has been
reviewed by an independent body of technical experts, the FIFRA
Scientific Advisory Panel, and found to be suitable for evaluating
risks to pesticide residues on food. The results of that review may be
found at http://www.epa.gov/scipoly/sap/2000/february/
partialfinalreport06292000.pdf.

D. Conditions

    Time-limited tolerances were originally proposed for fenbuconazole
because of several conditions of registration, namely the submission of
the following items. Five additional studies had to be submitted: (1)
Fish life cycle, (2) growth and reproduction of aquatic plants, (3)
droplet size spectrum, (4) drift field evaluation, and (5) 49-month
storage stability study. Several corrections to the labels were
required. Mitigation measures to address chronic non-target organism
toxicity concerns had to be identified and submitted. Production of the
Indar 75 WSP product could not exceed 38,000 lb (28,500 lb active
ingredient) for each year of conditional registration and information
on its production had to be submitted for the first federal fiscal year
during which fenbuconazole was registered for use on stone fruits and
pecans. Production information had to be submitted for the Enable 2F
product (EPA Registration Number 62719-416) for the first federal
fiscal year during which this product was registered for use on pecans.
The company has subsequently submitted studies, information, and
corrected labels, and participated in task forces, intended to satisfy
all these condition-of-registration requirements. All such submissions
that have been reviewed have been found to satisfy the appropriate
registration condition. However, the establishment of permanent
tolerances for fenbuconazole depends upon the resolution of recent
questions the Agency has raised regarding the toxicity of 1,2,4-
triazole, triazolylalanine, and triazolyl acetic acid, metabolites
common to the triazole class of fungicides. New data to address the
Agency's questions about these compounds is being generated and will be
reviewed by the Agency. However, the Agency has decided to extend the
time-limited tolerances until such data are reviewed and the questions
about 1,2,4-triazole, triazolylalanine, and triazolyl acetic acid have
been resolved.

V. Conclusion

    Therefore, the tolerance is established for the combined residues
of fenbuconazole, [alpha-[2-(4-chlorophenyl)-ethyl]-alpha-phenyl-3-(1H-
1,2,4-triazole)-1-propanenitrile] and its metabolites cis- andtrans-5-
(4-chlorophenyl)-dihydro-3-phenyl-3-(1H-1,2,4-triazole-1-ylmethyl)-2-
3H-furanone, in or on banana (whole fruit) at 0.3 ppm; fruit, stone,
group 12 (except plum, prune) at 2.0 ppm; pecan at 0.1 ppm.

VI. Objections and Hearing Requests

    Under section 408(g) of the FFDCA, as amended by the FQPA, any
person may file an objection to any aspect of this regulation and may
also request a hearing on those objections. The EPA procedural
regulations which govern the submission of objections and requests for
hearings appear in 40 CFR part 178. Although the procedures in those
regulations require some modification to reflect the amendments made to
the FFDCA by the FQPA, EPA will continue to use those procedures, with
appropriate adjustments, until the necessary modifications can be made.
The new section 408(g) of the FFDCA provides essentially the same
process for persons to ``object'' to a regulation for an exemption from
the requirement of a tolerance issued by EPA under new section 408(d),
as was provided in the old sections 408 and 409 of the FFDCA. However,
the period for filing objections is now 60 days, rather than 30 days.

A. What Do I Need to Do to File an Objection or Request a Hearing?

    You must file your objection or request a hearing on this
regulation in accordance with the instructions provided in this unit
and in 40 CFR part 178. To ensure proper receipt by EPA, you must
identify docket ID number OPP-2004-0410 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 on or before May 9, 2005.
     1. Filing the request. Your objection must specify the specific
provisions in the regulation that you object to, and the grounds for
the objections (40 CFR 178.25). If a hearing is requested, the
objections must include a statement of the factual issues(s) on which a
hearing is requested, the requestor's contentions on such issues, and a
summary of any evidence relied upon by the objector (40 CFR 178.27).
Information submitted in connection with an objection or hearing
request may be claimed confidential by marking any part or all of that
information as CBI. Information so marked will not be disclosed except
in accordance with procedures set forth in 40 CFR part 2. A copy of the
information that does not contain CBI must be submitted for inclusion
in the public record. Information not marked confidential may be
disclosed publicly by EPA without prior notice.
    Mail your written request to: Office of the Hearing Clerk (1900L),

[[Page 11582]]

Environmental Protection Agency, 1200 Pennsylvania Ave., NW.,
Washington, DC 20460-0001. You may also deliver your request to the
Office of the Hearing Clerk in Suite 350, 1099 14th St., NW.,
Washington, DC 20005. The Office of the Hearing Clerk is open from 8
a.m. to 4 p.m., Monday through Friday, excluding legal holidays. The
telephone number for the Office of the Hearing Clerk is (202) 564-6255.
    2. Copies for the Docket. In addition to filing an objection or
hearing request with the Hearing Clerk as described in Unit VI.A., you
should also send a copy of your request to the PIRIB for its inclusion
in the official record that is described in ADDRESSES. Mail your
copies, identified by docket ID number OPP-2004-0410, to: Public
Information and Records Integrity Branch, Information Resources and
Services Division (7502C), Office of Pesticide Programs, Environmental
Protection Agency, 1200 Pennsylvania Ave., NW., Washington, DC 20460-
0001. In person or by courier, bring a copy to the location of the
PIRIB described in ADDRESSES. You may also send an electronic copy of
your request via e-mail to: opp-docket@epa.gov. Please use an ASCII
file format and avoid the use of special characters and any form of
encryption. Copies of electronic objections and hearing requests will
also be accepted on disks in WordPerfect 6.1/8.0 or ASCII file format.
Do not include any CBI in your electronic copy. You may also submit an
electronic copy of your request at many Federal Depository Libraries.

B. When Will the Agency Grant a Request for a Hearing?

    A request for a hearing will be granted if the Administrator
determines that the material submitted shows the following: There is a
genuine and substantial issue of fact; there is a reasonable
possibility that available evidence identified by the requestor would,
if established resolve one or more of such issues in favor of the
requestor, taking into account uncontested claims or facts to the
contrary; and resolution of the factual issues(s) in the manner sought
by the requestor would be adequate to justify the action requested (40
CFR 178.32).

VII. 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 due to its lack of
significance, 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). 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., or 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). 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); or OMB review or any Agency action under Executive
Order 13045, entitled Protection of Children from Environmental Health
Risks and Safety Risks (62 FR 19885, April 23, 1997). 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). 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. In addition, the Agency has determined that this
action will not have a substantial direct effect on States, on the
relationship between the national government and the States, or on the
distribution of power and responsibilities among the various levels of
government, as specified in Executive Order 13132, entitledFederalism
(64 FR 43255, August 10, 1999). Executive Order 13132 requires EPA to
develop an accountable process to ensure ``meaningful and timely input
by State and local officials in the development of regulatory policies
that have federalism implications.'' ``Policies that have federalism
implications'' is defined in the Executive Order to include regulations
that have ``substantial direct effects on the States, on the
relationship between the national government and the States, or on the
distribution of power and responsibilities among the various levels of
government.'' This final rule directly regulates growers, food
processors, food handlers and food retailers, not States. This action
does not alter the relationships or distribution of power and
responsibilities established by Congress in the preemption provisions
of section 408(n)(4) of the FFDCA. For these same reasons, the Agency
has determined that this rule does not have any ``tribal implications''
as described in Executive Order 13175, entitled Consultation and
Coordination with Indian Tribal Governments (59 FR 22951, November 6,
2000). Executive Order 13175, requires EPA to develop an accountable
process to ensure ``meaningful and timely input by tribal officials in
the development of regulatory policies that have tribal implications.''
``Policies that have tribal implications'' is defined in the Executive
Order to include regulations that have ``substantial direct effects on
one or more Indian tribes, on the relationship between the Federal
Government and the Indian tribes, or on the distribution of power and
responsibilities between the Federal Government and Indian tribes.''
This rule will not have substantial direct effects on tribal
governments, on the relationship between the Federal Government and
Indian tribes, or on the distribution of power and responsibilities
between the Federal Government and Indian tribes, as specified in
Executive Order 13175. Thus, Executive Order 13175 does not apply to
this rule.

VIII. Congressional Review Act

    The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the
Small Business Regulatory Enforcement Fairness Act of 1996, generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report, which includes a copy of the rule,
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.

[[Page 11583]]

    Dated:February 18, 2005
Betty Shackleford,
Acting Director, Registration Division, Office of Pesticide Programs.

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

PART 180--AMENDED

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

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

? 2. Section 180.480 is amended by revising the table in paragraph (a)(1)
to read as follows:

Sec.  180.480   Fenbuconaozle; tolerances for residues.

    (a) General. * * *

------------------------------------------------------------------------
                                                             Expiration/
                   Commodity                     Parts per    revocation
                                                  million        date
------------------------------------------------------------------------
Banana (whole fruit)..........................          0.3     12/31/08
Fruit, stone, group 12, except plums and                2.0     12/31/08
 prunes.......................................
Pecans........................................          0.1     12/31/08
------------------------------------------------------------------------

* * * * *

[FR Doc. 05-4474 Filed 3-8-05; 8:45 am]
BILLING CODE 6560-50-S 

 
 


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