Tetraconazole; Time-Limited Pesticide Tolerance, 20821-20831 [05-8123]
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Federal Register / Vol. 70, No. 77 / Friday, April 22, 2005 / Rules and Regulations
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Subpart SS—Texas
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adding one new entry to the end of the
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Dated: April 14, 2005.
Richard E. Greene,
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40 CFR part 52 is amended as follows:
§ 52.2270
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PART 52—[AMENDED]
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[FR Doc. 05–8121 Filed 4–21–05; 8:45 am]
BILLING CODE 6560–50–P
ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 180
[OPP–2004–0388; FRL–7702–4]
Tetraconazole; Time-Limited Pesticide
Tolerance
Environmental Protection
Agency (EPA).
ACTION: Final rule.
AGENCY:
SUMMARY: This regulation establishes
time-limited tolerances for residues of
tetraconazole, 1-[2-(2,4-dichlorophenyl)3-(1,1,2,2-tetrafluoroethoxy)propyl]-1H1,2,4-triazole in or on sugarbeet roots at
0.05 parts per million (ppm), sugarbeet
top at 3.0 ppm, sugarbeet dried pulp at
0.15 ppm, sugarbeet molasses at 0.15
ppm, meat of cattle, goat, horse, and
sheep at 0.05 ppm, liver of cattle, goat,
horse, and sheep at 4.0 ppm, fat of
cattle, goat, horse, and sheep at 0.30
ppm, meat byproducts except liver of
cattle, goat, horse and sheep at 0.10 ppm
and milk at 0.05 ppm. Sipcam Agro
USA, Inc. requested these tolerances
under the Federal Food, Drug, and
Cosmetic Act (FFDCA), as amended by
the Food Quality Protection Act of 1996
(FQPA). Registrations will be limited to
the following States: Colorado,
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Minnesota, Michigan, Montana, North
Dakota, Nebraska, and Wyoming where
use has previously occurred under
section 18 of FIFRA. The tolerances will
expire on November 30, 2012.
DATES: This regulation is effective April
22, 2005. Objections and requests for
hearings must be received on or before
June 21, 2005.
ADDRESSES: To submit a written
objection or hearing request follow the
detailed instructions as provided in
Unit VI. of the SUPPLEMENTARY
INFORMATION. EPA has established a
docket for this action under docket
identification (ID) number OPP–2004–
0388. All documents in the docket are
listed in the EDOCKET index at
https://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.
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Comments
*
FOR FURTHER INFORMATION CONTACT:
Mary Waller, Registration Division
(7505C), Office of Pesticide Programs,
Environmental Protection Agency, 1200
Pennsylvania Ave., NW., Washington,
DC 20460–0001; telephone number:
(703) 308–9354; e-mail address:
waller.mary@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),
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 provides a guide
for readers regarding entities likely to be
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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 and Other Related
Information?
In addition to using EDOCKET
(https://www.epa.gov/edocket/), you may
access this Federal Register document
electronically through the EPA Internet
under the ‘‘FederalRegister’’ listings at
https://www.epa.gov/fedrgstr/. A
frequently updated electronic version of
40 CFR part 180 is available at E-CFR
Beta Site Two at https://
www.gpoaccess.gov/ecfr/. To access the
OPPTS Harmonized Guidelines
referenced in this document, go directly
to the guidelines at https://www.epa.gpo/
opptsfrs/home/guidelin.htm/.
II. Background and Statutory Findings
In the Federal Register of October 14,
1999 (64 FR 55714) (FRL–6382–7), EPA
issued a notice pursuant to section
408(d)(3) of the FFDCA, 21 U.S.C.
346a(d)(3), announcing the filing of
three pesticide petitions (9F5066,
9F6023 and 7E4830) by Sipcam Agro,
USA, Inc., 300 Colonial Center Parkway,
Roswell, GA 30076, formerly of 70
Mansell Court, Suite 230, Rosewell, GA
30076. The petitions requested that 40
CFR part 180 be amended by
establishing tolerances for residues of
the fungicide tetraconazole, in or on the
following raw agricultural commodities:
beets, sugar at 0.01 ppm, beets, sugar,
roots at 0.1 ppm, beets, sugar, tops at 7.0
ppm, beets, sugar, pulp, dried at 0.3
ppm, and beets, sugar, molasses at 0.3
ppm, cattle, meat at 0.01 ppm, cattle
meat byproducts at 2.0 ppm, cattle fat at
0.1 ppm, and milk at 0.02 ppm
(9F5066); peanuts meat (hulls removed)
at 0.03 ppm, peanuts meal at 0.03 ppm,
and peanuts oil at 0.1 ppm (9F6023);
and imported bananas at 0.2 ppm
(7E4830). Petition 7E4830 was later
withdrawn. Petition 9F6023 was placed
in abeyance by the petitioner. There
were no comments received in response
to the notice of filing. The tolerances
will expire on February 28, 2009.
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.’’
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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. * * *’’
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
of November 26, 1997 (62 FR 62961)
(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 tolerances for residues of
tetraconazole 1-[2-(2,4-dichlorophenyl)3-(1,1,2,2-tetrafluoroethoxy)propyl]-1H1,2,4-triazole in or on sugarbeet roots at
0.05 ppm; sugarbeet tops at 3.0 ppm;
sugarbeet dried pulp at 0.15 ppm;
sugarbeet molasses at 0.15 ppm; meat of
cattle, goat, horse, and sheep at 0.05
ppm; liver of cattle, goat, horse, and
sheep at 4.0 ppm; fat of cattle, goat,
horse, and sheep at 0.30 ppm; meat
byproducts except liver of cattle, goat,
horse and sheep at 0.10 ppm; and milk
at 0.05 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
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toxic effects caused by tetraconazole are
discussed below. Table 1 of this unit
presents the no observed adverse effect
level (NOAEL) and the lowest observed
adverse effect level (LOAEL) from the
toxicity studies reviewed.
1. Acute toxicity. Acute toxicity data
were as follows: Acute oral lethal dose
(LD)50 = 1,031 milligrams/kilogram (mg/
kg) (toxicity category III); acute dermal
LD50 < 2,000 mg/kg (toxicity category
III); acute inhalation lethal
concentration (LC)50 = 3.66 mg/liter (L)
(toxicity category IV); primary eye
irritation - clear by 72 hours (toxicity
category III); primary skin irritation slight irritation (toxicity category IV);
and dermal sensitization - negative.
2. Developmental toxicity in rats. A
developmental toxicity study was
conducted using rats gavaged with
doses of 0, 5, 22.5, 100 mg/kg/day from
days 2 through 15 of gestation. The
maternal toxicity LOAEL is 100 mg/kg/
day based on decreased body weight
gain, and food consumption and
increased liver and kidney weights. The
maternal toxicity NOAEL is 22.5 mg/kg/
day. Developmental toxicity was noted
at 100 mg/kg/day and consisted of an
increased incidence of small fetuses,
and supernumerary ribs. The LOAEL
and NOAEL for developmental toxicity
were 100 and 22.5 mg/kg/day,
respectively.
3. Development toxicity study in
rabbits. A developmental toxicity study
was conducted using rabbits gavaged
with doses of 0, 7.5, 15, and 30 mg/kg/
day from days 6 through 18 of gestation.
Compound-related maternal toxicity
was limited to depressed body weight
gain during the dosing period. No
treatment-related effects occurred in
maternal mortality, clinical signs, food
consumption, or cesarean parameters.
The maternal LOAEL is 30 mg/kg/day
based on decreased body weight gain.
The maternal NOAEL is 15 mg/kg/day.
No treatment-related effects in
developmental parameters were noted.
The developmental LOAEL is greater
than 30 mg/kg/day. The developmental
NOAEL is 30 mg/kg/day, the highest
dose tested (HDT).
4. Two-generation reproduction study.
A two-generation reproduction study
was conducted using rats fed diets with
dose levels of 0, 10, 70, or 490 ppm (0,
0.7, 4.9, and 35.5 mg/kg/day for males
or 0, 0.8, 5.9, and 40.6 mg/kg/day for
females). The LOAEL for parental
toxicity was 70 ppm (4.9 mg/kg/day in
males and 5.9 mg/kg/day in females)
based on increased mortality in P
generation females. The NOAEL was 10
ppm (0.7 mg/kg/day in males and 0.8
mg/kg/day in females). The LOAEL for
offspring toxicity was 490 ppm (40.6
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mg/kg/day from the P generation female
intake) based on decreased litter weight
and mean pup weight in litters of all
generations before weaning and
increased relative liver weights at
weaning in both sexes of all litters. The
NOAEL was 70 ppm (5.9 mg/kg/day).
The LOAEL for reproductive toxicity
was 70 ppm (4.9 mg/kg/day for males
and 5.9 mg/kg/day for females) based on
increased mean gestation duration in P
generation parental females and related
evidence of compound toxicity in the
parturition process. The NOAEL was 10
ppm (0.7 mg/kg/day for males and 0.8
for females).
5. Chronic toxicity. A chronic toxicity
study was conducted using dogs fed
diets containing 0, 22.5, 90, or 360 ppm
for 52 weeks. Treatment-related effects
at the high dose included slight but
nonsignificant body weight reductions
in both sexes from study week 3 to
termination; significantly increased
alkaline phosphatase, gammaglutamyltransferase, alanine
aminotransferase and ornithine
carbamoyl transferase in both sexes
from study week 13 to 52, increased
absolute and relative liver and kidney
weights for both sexes, and
histopathological changes in both
organs. In the mid-dose group, effects
were manifested as increased absolute
and relative kidney weights for males
correlated with histopathological
findings in the males (apparent
hypertrophy in cortical tubules of the
kidneys in one male). No adverse effects
were seen at the low dose. The NOAEL
is 22.5 ppm (equivalent to achieved
intakes of 0.73 mg/kg/day for males or
0.82 mg/kg/day for females) and the
LOAEL is 90 ppm (equivalent to
achieved intakes of 2.95 mg/kg/day for
males or 3.33 mg/kg/day for females)
based on increased absolute and relative
kidney weights and histopathological
changes in the male kidney.
6. Carcinogenicity study—i. Rats. A 2year carcinogenicity study was
conducted using rats fed diets
containing 0, 10, 80, 640 and 1,280 ppm
for males and 0, 10, 80, and 640 ppm
for females. The LOAEL is 640 ppm
(27.7/39.4 mg/kg/day in male/female)
based on histopathology of the bone
(osseous hypertrophy of the cranium/
parietal bone), pale and thickened
incisors, and decreased absolute and
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relative adrenal and pituitary weights in
males; decreased body weight (at
terminal sacrifice) in females. The
NOAEL is 80 ppm (3.4/4.4 mg/kg/day in
male/female). Under the conditions of
this study, there was no evidence of a
treatment-related increase in tumor
incidence when compared to controls.
Therefore, tetraconazole is not a
carcinogen in this study.
ii. Mice. An 80-week carcinogenicity
study was conducted using mice fed
diets containing 0, 10, 90, 800, or 1,250
ppm (0, 1.4, 12, 118, or 217 mg/kg/day
for males; 0, 1.6, 14.8, 140, or 224 mg/
kg/day for females). The systemic
toxicity LOAEL is 90 ppm (12 and 14.8
mg/kg/day for males and females,
respectively), based on increased liver
weight and hepatocyte vacuolation in
both sexes and increased kidney
weights in males. The NOAEL is 10
ppm (1.4 and 1.6 mg/kg/day for males
and females, respectively). There was
evidence of increased incidence of
combined benign and malignant liver
tumors in mice of both sexes treated
with 95.05% tetraconazole at 800 ppm
(48% for males and 22% for females)
and 1,250 ppm (84% for males and 64%
for females) compared to the control
(20% for males and 0% for females).
The doses were found to be adequate to
test the carcinogenic potential based on
the reduction of body weight gain and
increased mortality at the highest dose.
7. Mutagenicity studies. A battery of
mutagenicity studies yielded negative
results in Salmonella typhimurium,
cultured Chinese hamster ovary (CHO)
cells, and mouse lymphoma cells. There
was no evidence of clastogenicity in
vitro or in vivo and tetraconazole did
not induce unscheduled DNA synthesis
in human HeLa cells.
B. Toxicological Endpoints
The dose at which 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 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
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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 (aRfD or cRfD) 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 as 1 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 tetraconazole used for human risk
assessment is shown in the following
Table 1.
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TABLE 1.—SUMMARY OF TOXICOLOGICAL DOSE AND ENDPOINTS FOR TETRACONAZOLE FOR USE IN HUMAN RISK
ASSESSMENT
Dose Used in Risk Assessment UF
Exposure Scenario
FQPA SF* and Special
Level of Concern for Risk
Assessment
Study and Toxicological Effects
Acute dietary general population
(Infants and Children)
Not established
None
An end-point of concern attributable to a single
dose was not identified
An acute RfD was not established
Acute dietary, females (13– 50
years of age)
NOAEL = 22.5 mg/kg/day
UF = 100
Acute RfD = 0.225 mg/kg
FQPA SF = 1X
aPAD = acute RfD ÷ FQPA
SF = 0.225 mg/kg
Oral developmental toxicity study - rat
Developmental NOAEL = 22.5 mg/kg/day,
based on increased incidence of small
fetuses, and supernumerary ribs
Chronic dietary, all populations
NOAEL = 0.73 mg/kg/day
UF = 100
Chronic RfD = 0.0073 mg/
kg/day
FQPA SF = 1X
cPAD = chronic RfD ÷
FQPA SF = 0.0073 mg/
kg/day
Chronic oral toxicity - dog
Systemic toxicity LOAEL = 2.95/3.33 (M/F) mg/
kg/day, based on absolute and relative kidney weights and histopathological changes in
the male kidney
Cancer (oral, dermal, inhalation)
‘‘likely to be carcinogenic to
humans’’
*
Q1 * = 2.30 x 10-2, based on male mouse liver
benign and/or malignant combined tumor
rates
The reference to the FQPA SF refers to any additional safety factor retained due to concerns unique to the FQPA.
C. Exposure Assessment
1. Dietary exposure from food and
feed uses. Section 18 tolerances have
been established (40 CFR 180.557) for
the residues of tetraconazole, in or on
the following raw agricultural
commodities: Sugarbeet roots, tops,
molasses and dried pulp and cattle
meat, meat byproducts and milk. The
tolerances proposed in this assessment
are numerically different from the
current section 18 tolerance levels
which were based on higher use rates.
Additionally, tolerances are being
proposed for goat, horse, and sheep
commodities in addition to cattle. Since
section 18 registrations have been
authorized for the use of tetraconazole
on soybeans to control soybean rust, this
dietary assessment for use of
tetraconazole on sugarbeets assumes
residues on soybean products as well as
poultry and swine commodities. Risk
assessments were conducted by EPA to
assess dietary exposures from
tetraconazole in food as follows:
i. Acute exposure. Acute dietary risk
assessments are performed for a fooduse pesticide if a toxicological study has
indicated the possibility of an effect of
concern occurring as a result of a one
day or single exposure. The Dietary
Exposure Evaluation Model (DEEMTMFCIDTM) analysis evaluated the
individual food consumption as
reported by respondents in the United
States Department of Agriculture
(USDA)1994–1996 Nationwide
Continuing Surveys of Food Intake by
Individuals (CSFII) and accumulated
exposure to the chemical for each
commodity. The following assumptions
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were made for the acute exposure
assessments: Tolerance level residues
were used for all commodities and it
was assumed that 100% of all crops
were treated.
ii. Chronic exposure. In conducting
this chronic dietary risk assessment the
DEEMTM-FCIDTM analysis evaluated the
individual food consumption as
reported by respondents in the USDA
1994–1996 Nationwide CSFII and
accumulated exposure to the chemical
for each commodity. The following
assumptions were made for the chronic
exposure assessments: Tolerance level
residues were assumed for all soybean
commodities, poultry liver, poultry
meat byproducts, and eggs. Anticipated
residues were assumed for poultry fat,
poultry meat, milk, and all sugarbeet,
goat, horse, sheep, cattle, and swine
commodities. It was assumed that 100%
of all crops were treated.
iii. Cancer. In conducting the cancer
dietary risk assessment the Dietary
Exposure Evaluation Model (DEEMTMFCIDTM) analysis evaluated the
individual food consumption as
reported by respondents in the USDA
1994–1996 CSFII and accumulated
exposure to the chemical for each
commodity. The following assumptions
were made for the cancer exposure
assessments: Tolerance level residues
were assumed for poultry liver, poultry
meat byproducts, and eggs. Anticipated
residues were assumed for poultry fat,
poultry meat, milk, and all soybean,
sugarbeet, cattle, goat, sheep, horse and
swine commodities. For sugarbeets, 52
percent crop treated (PCT) was assumed
and 67 PCT was assumed for soybeans.
Additionally, water was included as a
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dietary commodity with a tetraconazole
concentration of 0.00446 ppm, equal to
the 30–year average surface water
concentration.
iv. Anticipated residue and PCT
information. 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
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Agency must provide for periodic
evaluation of any estimates used. To
provide for the periodic evaluation of
the estimate of PCT as required under
section 408(b)(2)(F) of the FFDCA, EPA
may require registrants to submit data
on PCT.
The Agency used PCT information as
follows:
The cancer dietary exposure analysis
used 52 PCT for sugarbeets and 67 PCT
for soybeans. The sugarbeet 52 PCT was
based on information from the United
States Department of Agriculture
(USDA) and from a propietary source
used by the Agency. The soybean 67
PCT was taken from the maximum
acreage per state allowed on Section 18
applications for tetraconizole on
soybeans; the maximum acreages for the
28 States with these Section 18
applications were added together and
divided by an estimate of the total
number of acres where soybeans would
be grown in the United States.
The Agency believes that the three
conditions listed in Unit C.1.iv. have
been met. With respect to Condition 1,
PCT estimates are derived from Federal
and private market survey data which
are reliable and have a valid basis.For
acute dietary exposure estimates, EPA
uses an estimated maximum PCT. The
exposure estimates resulting from this
approach reasonably represent the
highest levels to which an individual
could be exposed, and are unlikely to
underestimate an individual’s acute
dietary exposure. The Agency is
reasonably certain that the percentage of
the food treated is not likely to be an
underestimation. 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
tetraconazole 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
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tetraconazole 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
tetraconazole.
The Agency uses the First Index
Reservoir Screening Tool (FIRST) or the
Pesticide Root Zone/Exposure Analysis
Modeling System (PRZM/EXAMS), to
produce estimates of pesticide
concentrations in an index reservoir.
The SCI-GROW (screenimg
concentration in ground water) model is
used to predict pesticide concentrations
in shallow ground water. For a
screening-level assessment for surface
water EPA will use FIRST (a Tier 1
model) before using PRZM/EXAMS (a
Tier 2 model). The FIRST model is a
subset of the PRZM/EXAMS model that
uses a specific high-end runoff scenario
for pesticides. While both FIRST and
PRZM/EXAMS incorporate an index
reservoir environment, the PRZM/
EXAMS model includes a percent crop
(PC) area factor as an adjustment to
account for the maximum PC 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
comparison (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 tetraconazole
they are further discussed in the
aggregate risk sections in Unit III. E.
Based on the PRZM 3.12/ EXAMS
2.7.97 model, the estimated EECs of
tetraconazole for acute exposures are
estimated to be 8.38 parts per billion
(ppb) for surface water, representing the
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20825
1 in 10 year annual peak concentrations.
The surface water EECs are estimated to
be 5.58 ppb for chronic non-cancer
exposures (the 1 in 10 year annual
average concentration) and 4.46 ppb for
chronic cancer exposures (the 30 year
annual average concentration).
Based on the SCI-GROW model the
ground water EECs for all exposures are
estimated to be 0.5 ppb.
3. From non-dietary exposure. The
term ‘‘residential exposure’’ is used in
this document to refer to nonoccupational, non-dietary exposure
(e.g., for lawn and garden pest control,
indoor pest control, termiticides, and
flea and tick control on pets).
Tetraconazole 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.
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
tetraconazole and any other substances.
For the purposes of this tolerance
action, therefore, EPA has not assumed
that tetraconazole 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 the policy statements released by
EPA’s Office of Pesticide Programs
concerning common mechanism
determinations and procedures for
cumulating effects from substances
found to have a common mechanism on
EPA’s website at https://www.epa.gov/
pesticides/cumulative/.
However, the Agency does have
concern about potential toxicity to 1,2,4triazole and two conjugates,
triazolylalanine and triazolyl acetic
acid, metabolites common to most of the
triazole fungicides. To support the
extension of existing parent triazolederivative 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.
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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. Upon completion of the
review of these data, EPA will prepare
a more sophisticated assessment based
on the revised toxicological and
exposure databases.
i. Toxicology. The toxicological
database 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%—
the in vivo conversion for tetraconazole
is 77%. 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
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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. The dietary
assessment does not include potential
exposure via residues in water. It is
emphasized that the use of both highesttolerance-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. Triazolederivative 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 1,2,4triazole 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 1,2,4triazole 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.
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iv. Drinking water. Modeled estimates
of 1,2,4-triazole residues in surface and
ground water, as reported by the
USTTF, and the DWLOC approach were
used to address exposure to free triazole
in drinking water. Estimated
environmental concentrations (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. Contrarily, 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 limit of
detection (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 nondietary oral exposure to 1,2,4-triazole
and that pathway makes up the majority
of the residential exposure estimate for
children, application of that exposure
estimate to adults is considered to be
extremely conservative. Residential
exposure is expected to occur for shortterm 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 United States
are expected to be treated with triazole
fungicides, so the likelihood of cooccurring dietary and residential
exposures is very low.
With the exception of the acute
DWLOCs for infants and children 1 to
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6 years old, all DWLOCs are greater than
the largest EEC (surface water estimate
from use on turf). The EEC’s for these
two population groups exceed the
DWLOC’s by 1.1 to 3.2-fold, a result
typically interpreted to mean that
aggregate exposure exceeds EPA’s level
of concern. Although comparing the
EEC’s and the acute DWLOCs for infants
and children 1 to 6 years old 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 (CT),
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 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. 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 safety factor value
based on the use of traditional
uncertainty factors and/or special FQPA
safety factors, as appropriate.
2. Prenatal and postnatal sensitivity.
There is no evidence of increased
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susceptibility of rat or rabbit fetuses to
in utero exposure to tetraconazole. In
the developmental toxicity study in rats,
developmental effects were seen at the
same dose that induced maternal
toxicity. In the developmental toxicity
study in rabbits, no developmental
toxicity was seen at the HDT. In the
two-generation reproduction study,
offspring toxicity occurred at doses
higher than the dose that induced
parental/systemic toxicity. There are no
concerns or residual uncertainties for
prenatal and/or postnatal toxicity.
Additionally, there is no concern for
neurotoxicity resulting from exposure to
tetraconazole since there was no
evidence of neurotoxicity in short-term
studies in rats, mice and dogs; and a
long-term toxicity study in dogs.
3. Conclusion. Based on the following,
EPA concluded that the additional
safety factor for the protections of
infants and children could be removed:
• There is no quantitative or
qualitative evidence of increased
susceptibility of rat and rabbit fetuses to
in utero exposure in developmental
studies.
• There is no quantitative or
qualitative evidence of increased
susceptibility of rat offspring in the
multi-generation reproduction study.
• There are no residual uncertainties
for prenatal/postnatal toxicity.
• The toxicological database is
complete for FQPA assessment.
• The chronic non-cancer dietary
food exposure assessment utilizes
anticipated residue data and assumed
100% CT.
• The chronic assessment will not
underestimate exposure or risk since the
refinement is based on reliable data
derived from studies designed to
produce worst-case residues.
• At this time, only agricultural uses
have been proposed for tetraconazole.
There are no uses that would result in
residential or recreational exposures.
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
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20827
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 U.S. EPA 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 tetraconazole will
occupy 0.5% of the aPAD for females 13
to 49 years old, the only population
subgroup for which an acute toxicity
endpoint was determined. In addition,
there is potential for acute dietary
exposure to tetraconazole in drinking
water. 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 the
following Table 2.
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TABLE 2.—AGGREGATE RISK ASSESSMENT FOR ACUTE EXPOSURE TO TETRACONAZOLE.
Population Subgroup
aPAD (mg/kg/day)
Females (13–49 years old)
0.225
2. Chronic risk. Using the exposure
assumptions described in this unit for
chronic exposure, EPA has concluded
that exposure to tetraconazole from food
will utilize 3.9% of the cPAD for the
U.S. population, 11.1% of the cPAD for
non-nursing infants and 8.9% of the
Surface Water
EEC (ppb)
% aPAD (Food)
0.5
Ground Water
EEC (ppb)
8.38
cPAD for all infants < 1 year old. There
are no residential uses for tetraconazole
that result in chronic residential
exposure to tetraconazole. In addition,
there is potential for chronic dietary
exposure to tetraconazole in drinking
water. After calculating DWLOCs and
Acute DWLOC
(ppb)
0.51
6,720
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
following Table 3.
TABLE 3.—AGGREGATE RISK ASSESSMENT FOR CHRONIC (NON-CANCER) EXPOSURE TO TETRACONAZOLE.
Population Subgroup
cPAD mg/kg/day
Surface Water
EEC (ppb)
%cPAD (Food)
Ground Water
EEC (ppb)
Chronic DWLOC
(ppb)
U.S. population
0.0073
3.9
5.58
0.51
246
All infants (< 1 year old)
0.0073
8.9
5.58
0.51
67
Non-nursing infants
0.0073
11.1
5.58
0.51
65
Children (1–2 years old)
0.0073
8.4
5.58
0.51
67
Children (3–5 years old)
0.0073
8.5
5.58
0.51
67
Children (6–12 years old)
0.0073
6.1
5.58
0.51
69
Youth (13–19 years old)
0.0073
4.0
5.58
0.51
210
Adults (20–49)
0.0073
3.1
5.58
0.51
248
Adults (50+ years old)
0.0073
2.5
5.58
0.51
249
Females (13–49 years old)
0.0073
3.0
5.58
0.51
210
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).
Tetraconazole 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. The risk does 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).
Tetraconazole 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. The risk does not
exceed the Agency’s level of concern.
5. Aggregate cancer risk for U.S.
population. The estimated cancer risk
for the proposed use on sugarbeets and
existing section 18 exemptions for
soybeans is 2.5 x 10-6, a value that falls
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within the Agency’s risk standard for
cancer in the range of 1 x 10-6.
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 tetraconazole
residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology
(capillary gas chromotography with
electron capture detector (GC/ECD)) 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
There are no established Codex,
Canadian, or Mexican Maximum
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Residue Limits (MRLs) established for
tetraconazole.
C. Conditions
The following conditions will be
applied to the registration of
tetraconazole for use on sugarbeets:
1. Registration and tolerances will be
time-limited to allow review of triazole
data and completion of the triazole risk
assessment.
2. Registrations will be limited to the
following States: Colorado, Minnesota,
Michigan, Montana, North Dakota,
Nebraska, and Wyoming where use has
previously occurred under section 18 of
FIFRA.
3. The registrant will be required to
provide one additional side-by-side
sugarbeet field trial comparing two and
six applications of Eminent 125SL at
0.10 lb ai/acre/application.
4. The registrant will be required to
provide a 28 day inhalation study.
5. Well documented estimates of how
many pounds of tetraconazole will be
placed on the market to treat sugarbeets.
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6. Tetraconazole use reporting on
sugarbeets. This information should be
reported as how many pounds of
tetraconazole will be applied per acre
on sugarbeets.
V. Conclusion
Therefore, the tolerances are
established for residues of tetraconazole,
1-[2-(2,4-dichlorophenyl)-3-(1,1,2,2tetrafluoroethoxy)propyl]-1H-1,2,4triazole in or on sugarbeet root at 0.05
ppm, sugarbeet top at 3.0 ppm,
sugarbeet dried pulp at 0.15 ppm,
sugarbeet molasses at 0.15 ppm, meat of
cattle, goat, horse, and sheep at 0.05
ppm, liver of cattle, goat, horse, and
sheep at 4.0 ppm, fat of cattle, goat,
horse, and sheep at 0.30 ppm, meat
byproducts except liver of cattle, goat,
horse and sheep at 0.10 ppm and milk
at 0.05 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. 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–2004–0388 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 June 21, 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
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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),
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–2004–0388, 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 email 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
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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
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Federal Register / Vol. 70, No. 77 / Friday, April 22, 2005 / Rules and Regulations
levels of government, as specified in
Executive Order 13132, entitled
Federalism (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 (65 FR
67249, 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
Commodity
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: April 14, 2005.
James Jones,
Director, Office of Pesticide Programs.
Therefore, 40 CFR chapter I is
amended as follows:
I
PART 180—[AMENDED]
1. The authority citation for part 180
continues to read as follows:
I
Authority: 21 U.S.C. 321(q), 346a and 371.
2. Section 180.557 is revised to read as
follows:
I
§ 180.557 Tetraconazole; tolerances for
residues.
(a) General. [Reserved]
(b) Section 18 emergency exemptions.
[Reserved]
(c) Tolerances with regional
registrations. Tolerances are established
for residues of the fungicide,
tetraconazole 1-[2-(2,4-dichlorophenyl)3-(1,1,2,2-tetrafluoroethoxy)propyl]-1H1,2,4-triazole in or on the following
commodities:
Beet, sugar, dried pulp ............................................................................................................
Beet, sugar, molasses .............................................................................................................
Beet, sugar, roots ....................................................................................................................
Beet, sugar, tops .....................................................................................................................
Cattle, fat .................................................................................................................................
Cattle, liver ...............................................................................................................................
Cattle, meat .............................................................................................................................
Cattle, meat byproducts, except liver ......................................................................................
Goat, fat ...................................................................................................................................
Goat, liver ................................................................................................................................
Goat, meat ...............................................................................................................................
Goat, meat byproducts, except liver ........................................................................................
Horse, fat .................................................................................................................................
Horse, liver ...............................................................................................................................
Horse, meat .............................................................................................................................
Horse, meat byproducts, except liver ......................................................................................
Milk ...........................................................................................................................................
Sheep, fat ................................................................................................................................
Sheep, liver ..............................................................................................................................
Sheep, meat ............................................................................................................................
Sheep, meat byproducts, except liver .....................................................................................
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Federal Register / Vol. 70, No. 77 / Friday, April 22, 2005 / Rules and Regulations
(d) Indirect or inadvertent residues.
[Reserved]
[FR Doc. 05–8123 Filed 4–21–05; 8:45 am]
BILLING CODE 6560–50–S
DEPARTMENT OF DEFENSE
48 CFR Parts 202, 204, 211, 212, 243,
and 252
[DFARS Case 2003–D081]
Defense Federal Acquisition
Regulation Supplement; Unique Item
Identification and Valuation
Department of Defense (DoD).
Final rule.
AGENCY:
ACTION:
SUMMARY: DoD has issued a final rule
amending the Defense Federal
Acquisition Regulation Supplement
(DFARS) to establish policy for unique
identification and valuation of items
delivered under DoD contracts.
DATES: Effective April 22, 2005.
FOR FURTHER INFORMATION CONTACT: Ms.
Michele Peterson, Defense Acquisition
Regulations Directorate,
OUSD(AT&L)DPAP(DAR), IMD 3C132,
3062 Defense Pentagon, Washington, DC
20301–3062. Telephone (703) 602–0311;
facsimile (703) 602–0350. Please cite
DFARS Case 2003–D081.
SUPPLEMENTARY INFORMATION:
A. Background
DoD published an interim rule at 68
FR 75196 on December 30, 2003,
containing policy that requires
contractors to provide unique item
identification (UID) and the
Government’s unit acquisition cost for
items delivered under DoD contracts.
Thirteen sources submitted comments
on the interim rule. The following is a
discussion of the comments and the
changes made to the rule as a result of
those comments:
1. Comment: A respondent stated that
the implementation date of January 1,
2004, was too aggressive. The
respondent recommended a later
implementation date that would allow
time in which to alert both Federal
agencies and Federal contractors about
the specifics of the new rule.
DoD Response: DoD agrees that the
implementation schedule was
aggressive. However, the rule is
considered to be a strategic imperative.
The implementation schedule could not
be slipped.
2. Comment: We have been instructed
to identify ‘‘to be determined’’ in the
clause fill-in. We have also been
instructed to contact our requirements
(logistics) counterparts for their
VerDate jul<14>2003
15:26 Apr 21, 2005
Jkt 205001
determination if this clause applies.
According to our counterparts, they
don’t have the technical training or
knowledge to make that determination.
Also, there is currently no training or
knowledge in the contracting world on
a realistic cost for this information.
DoD Response: The clause must go
into all contracts that require the
delivery of ‘‘items’’ as defined in the
clause, unless an exception applies.
Items valued at or above $5,000 must be
marked with UID. The fill-ins are for
items that meet other specified
conditions, as well as embedded items
that meet specified conditions. The
implementing guidance in section
211.274 has been reworded for clarity to
specify that the requiring activity
determines what embedded items,
subassemblies, or components require
UID. There is less technical training or
knowledge required than the interim
rule implied; however, additional
information is available at https://
www.acq.osd.mil/dpap/uid.
3. Comment: DoD should give special
consideration to communicating, aiding,
and making available, training to all
suppliers that will need to comply with
this requirement—whether as prime
contractors, or as subcontractors at any
tier.
DoD Response: Concur. DoD is
engaged in a large communication effort
through its UID Program Office. The
UID Web site at https://www.acq.osd.mil/
dpap/uid should be consulted for
information and resources that are
available.
4. Comment: Both government buying
offices and prime contractors should be
encouraged to make special efforts to
assist small and small disadvantaged,
minority- or women-owned firms and
make accommodations as needed to
help them achieve the goals of this new
requirement.
DoD Response: Concur. Small
businesses will find that there are a
number of vendors, many of which are
small businesses themselves, that can
provide UID marking assistance.
Additionally, the final rule permits
exceptions to marking requirements for
items acquired from small business
concerns when it is more cost effective
for the Government requiring activity to
assign, mark, and register the UID after
delivery.
5. Comment: Not all requirements are
generated from DoD. How does this
requirement apply when a foreign
government is the customer? A related
comment was whether UID is applicable
to Foreign Military Sales (FMS)
contracts and whether our FMS
customers were consulted about UID
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20831
applicability and advised of potential
cost impacts.
DoD Response: Items valued at or
above $5,000, or items delivered to DoD
that meet other specified conditions,
must be marked with UID. There is no
exception for FMS contracts. This rule
has been developed with assistance
from our allies and in consideration of
international standards.
6. Comment: Does UID apply to items
that we lease but of which we never take
ownership?
DoD Response: Yes. Items valued at or
above $5,000, or items delivered to DoD
that meet other specified conditions,
must be marked with UID.
7. Comment: Two respondents asked
whether UID and valuation apply to
classified or COMSEC contracts. One
respondent suggested that the final rule
include instructions to require that all
such issues be directed to the
contracting officer for resolution.
DoD Response: Yes, the UID and
valuation apply to classified contracts,
unless there is an exemption cited in
program directives.
8. Comment: Does UID apply to
furniture that has an acquisition cost of
$5,000 and above?
DoD Response: Yes, all items over
$5,000 in value require unique
identification.
9. Comment: The clause should
include a statement that the contractor
must comply with the most current
version of MIL–STD–130.
DoD Response: Concur. After much
consideration, it was considered best to
refer to the version of MIL–STD–130
that is cited in the contract Schedule.
This allows for updating, if necessary, at
the time of award.
10. Comment: Is UID really
appropriate when, in all likelihood, it
probably will not survive the
manufacturing process?
DoD Response: If an item is valued at
or above $5,000, and it is delivered to
DoD, it must be marked with UID. One
of the purposes of UID is to be able to
track items that may be warehoused for
a period of time prior to being
incorporated into a manufactured end
item. The property record that was
created when the item was delivered
should be annotated with the item’s
disposition when it is incorporated into
a manufactured item.
11. Comment: One respondent
believes that, in an effort to save
taxpayer dollars, items required for their
own base operations, that are never
used/received by the warfighter (i.e., is
not a spare part), should be excluded.
DoD Response: Do not concur. Items
valued at or above $5,000, or items
meeting other specified conditions that
E:\FR\FM\22APR1.SGM
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Agencies
[Federal Register Volume 70, Number 77 (Friday, April 22, 2005)]
[Rules and Regulations]
[Pages 20821-20831]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-8123]
-----------------------------------------------------------------------
ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 180
[OPP-2004-0388; FRL-7702-4]
Tetraconazole; Time-Limited Pesticide Tolerance
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: This regulation establishes time-limited tolerances for
residues of tetraconazole, 1-[2-(2,4-dichlorophenyl)-3-(1,1,2,2-
tetrafluoroethoxy)propyl]-1H-1,2,4-triazole in or on sugarbeet roots at
0.05 parts per million (ppm), sugarbeet top at 3.0 ppm, sugarbeet dried
pulp at 0.15 ppm, sugarbeet molasses at 0.15 ppm, meat of cattle, goat,
horse, and sheep at 0.05 ppm, liver of cattle, goat, horse, and sheep
at 4.0 ppm, fat of cattle, goat, horse, and sheep at 0.30 ppm, meat
byproducts except liver of cattle, goat, horse and sheep at 0.10 ppm
and milk at 0.05 ppm. Sipcam Agro USA, Inc. requested these tolerances
under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by
the Food Quality Protection Act of 1996 (FQPA). Registrations will be
limited to the following States: Colorado, Minnesota, Michigan,
Montana, North Dakota, Nebraska, and Wyoming where use has previously
occurred under section 18 of FIFRA. The tolerances will expire on
November 30, 2012.
DATES: This regulation is effective April 22, 2005. Objections and
requests for hearings must be received on or before June 21, 2005.
ADDRESSES: To submit a written objection or hearing request follow the
detailed instructions as provided in Unit VI. of the SUPPLEMENTARY
INFORMATION. EPA has established a docket for this action under docket
identification (ID) number OPP-2004-0388. All documents in the docket
are listed in the EDOCKET index at https://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: Mary Waller, Registration Division
(7505C), Office of Pesticide Programs, Environmental Protection Agency,
1200 Pennsylvania Ave., NW., Washington, DC 20460-0001; telephone
number: (703) 308-9354; e-mail address: waller.mary@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), 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 provides
a guide for readers regarding entities likely to be
[[Page 20822]]
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 and Other
Related Information?
In addition to using EDOCKET (https://www.epa.gov/edocket/), you may
access this Federal Register document electronically through the EPA
Internet under the ``FederalRegister'' listings at https://www.epa.gov/
fedrgstr/. A frequently updated electronic version of 40 CFR part 180
is available at E-CFR Beta Site Two at https://www.gpoaccess.gov/ecfr/.
To access the OPPTS Harmonized Guidelines referenced in this document,
go directly to the guidelines at https://www.epa.gpo/opptsfrs/home/
guidelin.htm/.
II. Background and Statutory Findings
In the Federal Register of October 14, 1999 (64 FR 55714) (FRL-
6382-7), EPA issued a notice pursuant to section 408(d)(3) of the
FFDCA, 21 U.S.C. 346a(d)(3), announcing the filing of three pesticide
petitions (9F5066, 9F6023 and 7E4830) by Sipcam Agro, USA, Inc., 300
Colonial Center Parkway, Roswell, GA 30076, formerly of 70 Mansell
Court, Suite 230, Rosewell, GA 30076. The petitions requested that 40
CFR part 180 be amended by establishing tolerances for residues of the
fungicide tetraconazole, in or on the following raw agricultural
commodities: beets, sugar at 0.01 ppm, beets, sugar, roots at 0.1 ppm,
beets, sugar, tops at 7.0 ppm, beets, sugar, pulp, dried at 0.3 ppm,
and beets, sugar, molasses at 0.3 ppm, cattle, meat at 0.01 ppm, cattle
meat byproducts at 2.0 ppm, cattle fat at 0.1 ppm, and milk at 0.02 ppm
(9F5066); peanuts meat (hulls removed) at 0.03 ppm, peanuts meal at
0.03 ppm, and peanuts oil at 0.1 ppm (9F6023); and imported bananas at
0.2 ppm (7E4830). Petition 7E4830 was later withdrawn. Petition 9F6023
was placed in abeyance by the petitioner. There were no comments
received in response to the notice of filing. The tolerances will
expire on February 28, 2009.
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. * *
*''
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 of November 26, 1997 (62 FR 62961)
(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 tolerances for residues of tetraconazole 1-
[2-(2,4-dichlorophenyl)-3-(1,1,2,2-tetrafluoroethoxy)propyl]-1H-1,2,4-
triazole in or on sugarbeet roots at 0.05 ppm; sugarbeet tops at 3.0
ppm; sugarbeet dried pulp at 0.15 ppm; sugarbeet molasses at 0.15 ppm;
meat of cattle, goat, horse, and sheep at 0.05 ppm; liver of cattle,
goat, horse, and sheep at 4.0 ppm; fat of cattle, goat, horse, and
sheep at 0.30 ppm; meat byproducts except liver of cattle, goat, horse
and sheep at 0.10 ppm; and milk at 0.05 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 tetraconazole are
discussed below. Table 1 of this unit presents the no observed adverse
effect level (NOAEL) and the lowest observed adverse effect level
(LOAEL) from the toxicity studies reviewed.
1. Acute toxicity. Acute toxicity data were as follows: Acute oral
lethal dose (LD)50 = 1,031 milligrams/kilogram (mg/kg)
(toxicity category III); acute dermal LD50 < 2,000 mg/kg
(toxicity category III); acute inhalation lethal concentration
(LC)50 = 3.66 mg/liter (L) (toxicity category IV); primary
eye irritation - clear by 72 hours (toxicity category III); primary
skin irritation - slight irritation (toxicity category IV); and dermal
sensitization - negative.
2. Developmental toxicity in rats. A developmental toxicity study
was conducted using rats gavaged with doses of 0, 5, 22.5, 100 mg/kg/
day from days 2 through 15 of gestation. The maternal toxicity LOAEL is
100 mg/kg/day based on decreased body weight gain, and food consumption
and increased liver and kidney weights. The maternal toxicity NOAEL is
22.5 mg/kg/day. Developmental toxicity was noted at 100 mg/kg/day and
consisted of an increased incidence of small fetuses, and supernumerary
ribs. The LOAEL and NOAEL for developmental toxicity were 100 and 22.5
mg/kg/day, respectively.
3. Development toxicity study in rabbits. A developmental toxicity
study was conducted using rabbits gavaged with doses of 0, 7.5, 15, and
30 mg/kg/day from days 6 through 18 of gestation. Compound-related
maternal toxicity was limited to depressed body weight gain during the
dosing period. No treatment-related effects occurred in maternal
mortality, clinical signs, food consumption, or cesarean parameters.
The maternal LOAEL is 30 mg/kg/day based on decreased body weight gain.
The maternal NOAEL is 15 mg/kg/day. No treatment-related effects in
developmental parameters were noted. The developmental LOAEL is greater
than 30 mg/kg/day. The developmental NOAEL is 30 mg/kg/day, the highest
dose tested (HDT).
4. Two-generation reproduction study. A two-generation reproduction
study was conducted using rats fed diets with dose levels of 0, 10, 70,
or 490 ppm (0, 0.7, 4.9, and 35.5 mg/kg/day for males or 0, 0.8, 5.9,
and 40.6 mg/kg/day for females). The LOAEL for parental toxicity was 70
ppm (4.9 mg/kg/day in males and 5.9 mg/kg/day in females) based on
increased mortality in P generation females. The NOAEL was 10 ppm (0.7
mg/kg/day in males and 0.8 mg/kg/day in females). The LOAEL for
offspring toxicity was 490 ppm (40.6
[[Page 20823]]
mg/kg/day from the P generation female intake) based on decreased
litter weight and mean pup weight in litters of all generations before
weaning and increased relative liver weights at weaning in both sexes
of all litters. The NOAEL was 70 ppm (5.9 mg/kg/day). The LOAEL for
reproductive toxicity was 70 ppm (4.9 mg/kg/day for males and 5.9 mg/
kg/day for females) based on increased mean gestation duration in P
generation parental females and related evidence of compound toxicity
in the parturition process. The NOAEL was 10 ppm (0.7 mg/kg/day for
males and 0.8 for females).
5. Chronic toxicity. A chronic toxicity study was conducted using
dogs fed diets containing 0, 22.5, 90, or 360 ppm for 52 weeks.
Treatment-related effects at the high dose included slight but
nonsignificant body weight reductions in both sexes from study week 3
to termination; significantly increased alkaline phosphatase, gamma-
glutamyltransferase, alanine aminotransferase and ornithine carbamoyl
transferase in both sexes from study week 13 to 52, increased absolute
and relative liver and kidney weights for both sexes, and
histopathological changes in both organs. In the mid-dose group,
effects were manifested as increased absolute and relative kidney
weights for males correlated with histopathological findings in the
males (apparent hypertrophy in cortical tubules of the kidneys in one
male). No adverse effects were seen at the low dose. The NOAEL is 22.5
ppm (equivalent to achieved intakes of 0.73 mg/kg/day for males or 0.82
mg/kg/day for females) and the LOAEL is 90 ppm (equivalent to achieved
intakes of 2.95 mg/kg/day for males or 3.33 mg/kg/day for females)
based on increased absolute and relative kidney weights and
histopathological changes in the male kidney.
6. Carcinogenicity study--i. Rats. A 2-year carcinogenicity study
was conducted using rats fed diets containing 0, 10, 80, 640 and 1,280
ppm for males and 0, 10, 80, and 640 ppm for females. The LOAEL is 640
ppm (27.7/39.4 mg/kg/day in male/female) based on histopathology of the
bone (osseous hypertrophy of the cranium/parietal bone), pale and
thickened incisors, and decreased absolute and relative adrenal and
pituitary weights in males; decreased body weight (at terminal
sacrifice) in females. The NOAEL is 80 ppm (3.4/4.4 mg/kg/day in male/
female). Under the conditions of this study, there was no evidence of a
treatment-related increase in tumor incidence when compared to
controls. Therefore, tetraconazole is not a carcinogen in this study.
ii. Mice. An 80-week carcinogenicity study was conducted using mice
fed diets containing 0, 10, 90, 800, or 1,250 ppm (0, 1.4, 12, 118, or
217 mg/kg/day for males; 0, 1.6, 14.8, 140, or 224 mg/kg/day for
females). The systemic toxicity LOAEL is 90 ppm (12 and 14.8 mg/kg/day
for males and females, respectively), based on increased liver weight
and hepatocyte vacuolation in both sexes and increased kidney weights
in males. The NOAEL is 10 ppm (1.4 and 1.6 mg/kg/day for males and
females, respectively). There was evidence of increased incidence of
combined benign and malignant liver tumors in mice of both sexes
treated with 95.05% tetraconazole at 800 ppm (48% for males and 22% for
females) and 1,250 ppm (84% for males and 64% for females) compared to
the control (20% for males and 0% for females). The doses were found to
be adequate to test the carcinogenic potential based on the reduction
of body weight gain and increased mortality at the highest dose.
7. Mutagenicity studies. A battery of mutagenicity studies yielded
negative results in Salmonella typhimurium, cultured Chinese hamster
ovary (CHO) cells, and mouse lymphoma cells. There was no evidence of
clastogenicity in vitro or in vivo and tetraconazole did not induce
unscheduled DNA synthesis in human HeLa cells.
B. Toxicological Endpoints
The dose at which 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 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 (aRfD or cRfD) 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 as 1 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 tetraconazole used for human risk assessment is shown in
the following Table 1.
[[Page 20824]]
Table 1.--Summary of Toxicological Dose and Endpoints for Tetraconazole for Use in Human Risk Assessment
----------------------------------------------------------------------------------------------------------------
FQPA SF* and Special
Exposure Scenario Dose Used in Risk Level of Concern for Study and Toxicological
Assessment UF Risk Assessment Effects
----------------------------------------------------------------------------------------------------------------
Acute dietary general population Not established None An end-point of concern
(Infants and Children) attributable to a
single dose was not
identified
An acute RfD was not
established
----------------------------------------------------------------------------------------------------------------
Acute dietary, females (13- 50 years NOAEL = 22.5 mg/kg/day FQPA SF = 1X Oral developmental
of age) UF = 100............... aPAD = acute RfD / FQPA toxicity study - rat
Acute RfD = 0.225 mg/kg SF = 0.225 mg/kg. Developmental NOAEL =
22.5 mg/kg/day, based
on increased incidence
of small fetuses, and
supernumerary ribs
----------------------------------------------------------------------------------------------------------------
Chronic dietary, all populations NOAEL = 0.73 mg/kg/day FQPA SF = 1X Chronic oral toxicity -
UF = 100............... cPAD = chronic RfD / dog
Chronic RfD = 0.0073 mg/ FQPA SF = 0.0073 mg/kg/ Systemic toxicity LOAEL
kg/day. day. = 2.95/3.33 (M/F) mg/
kg/day, based on
absolute and relative
kidney weights and
histopathological
changes in the male
kidney
----------------------------------------------------------------------------------------------------------------
Cancer (oral, dermal, inhalation) ``likely to be Q1 * = 2.30 x 10-2,
carcinogenic to based on male mouse
humans'' liver benign and/or
malignant combined
tumor rates
----------------------------------------------------------------------------------------------------------------
* The reference to the FQPA SF refers to any additional safety factor retained due to concerns unique to the
FQPA.
C. Exposure Assessment
1. Dietary exposure from food and feed uses. Section 18 tolerances
have been established (40 CFR 180.557) for the residues of
tetraconazole, in or on the following raw agricultural commodities:
Sugarbeet roots, tops, molasses and dried pulp and cattle meat, meat
byproducts and milk. The tolerances proposed in this assessment are
numerically different from the current section 18 tolerance levels
which were based on higher use rates. Additionally, tolerances are
being proposed for goat, horse, and sheep commodities in addition to
cattle. Since section 18 registrations have been authorized for the use
of tetraconazole on soybeans to control soybean rust, this dietary
assessment for use of tetraconazole on sugarbeets assumes residues on
soybean products as well as poultry and swine commodities. Risk
assessments were conducted by EPA to assess dietary exposures from
tetraconazole 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 one day
or single exposure. The Dietary Exposure Evaluation Model
(DEEMTM-FCIDTM) analysis evaluated the individual
food consumption as reported by respondents in the United States
Department of Agriculture (USDA)1994-1996 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 commodities and it was assumed that 100% of all crops were treated.
ii. Chronic exposure. In conducting this chronic dietary risk
assessment the DEEMTM-FCIDTM analysis evaluated
the individual food consumption as reported by respondents in the USDA
1994-1996 Nationwide CSFII and accumulated exposure to the chemical for
each commodity. The following assumptions were made for the chronic
exposure assessments: Tolerance level residues were assumed for all
soybean commodities, poultry liver, poultry meat byproducts, and eggs.
Anticipated residues were assumed for poultry fat, poultry meat, milk,
and all sugarbeet, goat, horse, sheep, cattle, and swine commodities.
It was assumed that 100% of all crops were treated.
iii. Cancer. In conducting the cancer dietary risk assessment the
Dietary Exposure Evaluation Model (DEEMTM-FCIDTM)
analysis evaluated the individual food consumption as reported by
respondents in the USDA 1994-1996 CSFII and accumulated exposure to the
chemical for each commodity. The following assumptions were made for
the cancer exposure assessments: Tolerance level residues were assumed
for poultry liver, poultry meat byproducts, and eggs. Anticipated
residues were assumed for poultry fat, poultry meat, milk, and all
soybean, sugarbeet, cattle, goat, sheep, horse and swine commodities.
For sugarbeets, 52 percent crop treated (PCT) was assumed and 67 PCT
was assumed for soybeans. Additionally, water was included as a dietary
commodity with a tetraconazole concentration of 0.00446 ppm, equal to
the 30-year average surface water concentration.
iv. Anticipated residue and PCT information. 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
[[Page 20825]]
Agency must provide for periodic evaluation of any estimates used. To
provide for the periodic evaluation of the estimate of PCT as required
under section 408(b)(2)(F) of the FFDCA, EPA may require registrants to
submit data on PCT.
The Agency used PCT information as follows:
The cancer dietary exposure analysis used 52 PCT for sugarbeets and
67 PCT for soybeans. The sugarbeet 52 PCT was based on information from
the United States Department of Agriculture (USDA) and from a
propietary source used by the Agency. The soybean 67 PCT was taken from
the maximum acreage per state allowed on Section 18 applications for
tetraconizole on soybeans; the maximum acreages for the 28 States with
these Section 18 applications were added together and divided by an
estimate of the total number of acres where soybeans would be grown in
the United States.
The Agency believes that the three conditions listed in Unit
C.1.iv. have been met. With respect to Condition 1, PCT estimates are
derived from Federal and private market survey data which are reliable
and have a valid basis.For acute dietary exposure estimates, EPA uses
an estimated maximum PCT. The exposure estimates resulting from this
approach reasonably represent the highest levels to which an individual
could be exposed, and are unlikely to underestimate an individual's
acute dietary exposure. The Agency is reasonably certain that the
percentage of the food treated is not likely to be an underestimation.
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 tetraconazole
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 tetraconazole 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 tetraconazole.
The Agency uses the First Index Reservoir Screening Tool (FIRST) or
the Pesticide Root Zone/Exposure Analysis Modeling System (PRZM/EXAMS),
to produce estimates of pesticide concentrations in an index reservoir.
The SCI-GROW (screenimg concentration in ground water) model is used to
predict pesticide concentrations in shallow ground water. For a
screening-level assessment for surface water EPA will use FIRST (a Tier
1 model) before using PRZM/EXAMS (a Tier 2 model). The FIRST model is a
subset of the PRZM/EXAMS model that uses a specific high-end runoff
scenario for pesticides. While both FIRST and PRZM/EXAMS incorporate an
index reservoir environment, the PRZM/EXAMS model includes a percent
crop (PC) area factor as an adjustment to account for the maximum PC
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 comparison (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 tetraconazole they are
further discussed in the aggregate risk sections in Unit III. E.
Based on the PRZM 3.12/ EXAMS 2.7.97 model, the estimated EECs of
tetraconazole for acute exposures are estimated to be 8.38 parts per
billion (ppb) for surface water, representing the 1 in 10 year annual
peak concentrations. The surface water EECs are estimated to be 5.58
ppb for chronic non-cancer exposures (the 1 in 10 year annual average
concentration) and 4.46 ppb for chronic cancer exposures (the 30 year
annual average concentration).
Based on the SCI-GROW model the ground water EECs for all exposures
are estimated to be 0.5 ppb.
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). Tetraconazole 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. 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 tetraconazole and any
other substances. For the purposes of this tolerance action, therefore,
EPA has not assumed that tetraconazole 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 the policy
statements released by EPA's Office of Pesticide Programs concerning
common mechanism determinations and procedures for cumulating effects
from substances found to have a common mechanism on EPA's website at
https://www.epa.gov/pesticides/cumulative/.
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.
[[Page 20826]]
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. Upon completion of the review of these
data, EPA will prepare a more sophisticated assessment based on the
revised toxicological and exposure databases.
i. Toxicology. The toxicological database 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%--the in vivo conversion for tetraconazole is 77%. 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. The dietary assessment does not include potential exposure via
residues in water. 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 and ground water, as reported by the USTTF, and the DWLOC
approach were used to address exposure to free triazole in drinking
water. Estimated environmental concentrations (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. Contrarily, 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 limit of detection (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 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 United States 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
to
[[Page 20827]]
6 years old, all DWLOCs are greater than the largest EEC (surface water
estimate from use on turf). The EEC's for these two population groups
exceed the DWLOC's by 1.1 to 3.2-fold, a result typically interpreted
to mean that aggregate exposure exceeds EPA's level of concern.
Although comparing the EEC's and the acute DWLOCs for infants and
children 1 to 6 years old 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 (CT), 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 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. 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 safety factor value based on
the use of traditional uncertainty factors and/or special FQPA safety
factors, as appropriate.
2. Prenatal and postnatal sensitivity. There is no evidence of
increased susceptibility of rat or rabbit fetuses to in utero exposure
to tetraconazole. In the developmental toxicity study in rats,
developmental effects were seen at the same dose that induced maternal
toxicity. In the developmental toxicity study in rabbits, no
developmental toxicity was seen at the HDT. In the two-generation
reproduction study, offspring toxicity occurred at doses higher than
the dose that induced parental/systemic toxicity. There are no concerns
or residual uncertainties for prenatal and/or postnatal toxicity.
Additionally, there is no concern for neurotoxicity resulting from
exposure to tetraconazole since there was no evidence of neurotoxicity
in short-term studies in rats, mice and dogs; and a long-term toxicity
study in dogs.
3. Conclusion. Based on the following, EPA concluded that the
additional safety factor for the protections of infants and children
could be removed:
There is no quantitative or qualitative evidence of
increased susceptibility of rat and rabbit fetuses to in utero exposure
in developmental studies.
There is no quantitative or qualitative evidence of
increased susceptibility of rat offspring in the multi-generation
reproduction study.
There are no residual uncertainties for prenatal/postnatal
toxicity.
The toxicological database is complete for FQPA
assessment.
The chronic non-cancer dietary food exposure assessment
utilizes anticipated residue data and assumed 100% CT.
The chronic assessment will not underestimate exposure or
risk since the refinement is based on reliable data derived from
studies designed to produce worst-case residues.
At this time, only agricultural uses have been proposed
for tetraconazole. There are no uses that would result in residential
or recreational exposures.
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 U.S. EPA 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
tetraconazole will occupy 0.5% of the aPAD for females 13 to 49 years
old, the only population subgroup for which an acute toxicity endpoint
was determined. In addition, there is potential for acute dietary
exposure to tetraconazole in drinking water. 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 the following Table 2.
[[Page 20828]]
Table 2.--Aggregate Risk Assessment for Acute Exposure to Tetraconazole.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Surface Water EEC Ground Water EEC
Population Subgroup aPAD (mg/kg/day) % aPAD (Food) (ppb) (ppb) Acute DWLOC (ppb)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Females (13-49 years old) 0.225 0.5 8.38 0.51 6,720
--------------------------------------------------------------------------------------------------------------------------------------------------------
2. Chronic risk. Using the exposure assumptions described in this
unit for chronic exposure, EPA has concluded that exposure to
tetraconazole from food will utilize 3.9% of the cPAD for the U.S.
population, 11.1% of the cPAD for non-nursing infants and 8.9% of the
cPAD for all infants < 1 year old. There are no residential uses for
tetraconazole that result in chronic residential exposure to
tetraconazole. In addition, there is potential for chronic dietary
exposure to tetraconazole in drinking water. 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 following Table 3.
Table 3.--Aggregate Risk Assessment for Chronic (Non-Cancer) Exposure to Tetraconazole.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Surface Water EEC Ground Water EEC Chronic DWLOC
Population Subgroup cPAD mg/kg/day %cPAD (Food) (ppb) (ppb) (ppb)
--------------------------------------------------------------------------------------------------------------------------------------------------------
U.S. population 0.0073 3.9 5.58 0.51 246
--------------------------------------------------------------------------------------------------------------------
All infants (< 1 year old) 0.0073 8.9 5.58 0.51 67
--------------------------------------------------------------------------------------------------------------------
Non-nursing infants 0.0073 11.1 5.58 0.51 65
--------------------------------------------------------------------------------------------------------------------
Children (1-2 years old) 0.0073 8.4 5.58 0.51 67
--------------------------------------------------------------------------------------------------------------------
Children (3-5 years old) 0.0073 8.5 5.58 0.51 67
--------------------------------------------------------------------------------------------------------------------
Children (6-12 years old) 0.0073 6.1 5.58 0.51 69
--------------------------------------------------------------------------------------------------------------------
Youth (13-19 years old) 0.0073 4.0 5.58 0.51 210
--------------------------------------------------------------------------------------------------------------------
Adults (20-49) 0.0073 3.1 5.58 0.51 248
--------------------------------------------------------------------------------------------------------------------
Adults (50+ years old) 0.0073 2.5 5.58 0.51 249
--------------------------------------------------------------------------------------------------------------------
Females (13-49 years old) 0.0073 3.0 5.58 0.51 210
--------------------------------------------------------------------------------------------------------------------------------------------------------
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). Tetraconazole 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. The risk does 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).
Tetraconazole 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. The risk does not exceed the
Agency's level of concern.
5. Aggregate cancer risk for U.S. population. The estimated cancer
risk for the proposed use on sugarbeets and existing section 18
exemptions for soybeans is 2.5 x 10-6, a value that falls
within the Agency's risk standard for cancer in the range of 1 x
10-6.
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 tetraconazole residues.
IV. Other Considerations
A. Analytical Enforcement Methodology
Adequate enforcement methodology (capillary gas chromotography with
electron capture detector (GC/ECD)) 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
There are no established Codex, Canadian, or Mexican Maximum
Residue Limits (MRLs) established for tetraconazole.
C. Conditions
The following conditions will be applied to the registration of
tetraconazole for use on sugarbeets:
1. Registration and tolerances will be time-limited to allow review
of triazole data and completion of the triazole risk assessment.
2. Registrations will be limited to the following States: Colorado,
Minnesota, Michigan, Montana, North Dakota, Nebraska, and Wyoming where
use has previously occurred under section 18 of FIFRA.
3. The registrant will be required to provide one additional side-
by-side sugarbeet field trial comparing two and six applications of
Eminent 125SL at 0.10 lb ai/acre/application.
4. The registrant will be required to provide a 28 day inhalation
study.
5. Well documented estimates of how many pounds of tetraconazole
will be placed on the market to treat sugarbeets.
[[Page 20829]]
6. Tetraconazole use reporting on sugarbeets. This information
should be reported as how many pounds of tetraconazole will be applied
per acre on sugarbeets.
V. Conclusion
Therefore, the tolerances are established for residues of
tetraconazole, 1-[2-(2,4-dichlorophenyl)-3-(1,1,2,2-
tetrafluoroethoxy)propyl]-1H-1,2,4-triazole in or on sugarbeet root at
0.05 ppm, sugarbeet top at 3.0 ppm, sugarbeet dried pulp at 0.15 ppm,
sugarbeet molasses at 0.15 ppm, meat of cattle, goat, horse, and sheep
at 0.05 ppm, liver of cattle, goat, horse, and sheep at 4.0 ppm, fat of
cattle, goat, horse, and sheep at 0.30 ppm, meat byproducts except
liver of cattle, goat, horse and sheep at 0.10 ppm and milk at 0.05
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. 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-2004-0388 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 June 21,
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),
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-2004-0388, 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 n