Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

 

OFFICE OF CHEMICAL SAFETY AND

 POLLUTION PREVENTION

MEMORANDUM

Date: 19-JUN-2012

SUBJECT: Glufosinate Ammonium. Update of the Revised Acute and Chronic Aggregate 

Dietary (Food and Drinking Water) Exposure Assessment in Support of the 

Petition Proposing Tolerances for Residues of Glufosinate Ammonium in/on 

Citrus Fruits (Crop Group 10), Pome Fruits (Crop Group 11), Stone Fruits (Crop 

Group 12), Olives, and Sweet Corn.

PC Code: 128850 DP Barcode: D402741

Decision No.: 402155 Registration No.: NA

Petition No.: 9E7604 & 9F7655 Regulatory Action: Section 3

Assessment Type: Dietary Case No.: 7224

TXR No.: NA CAS No.: 77182-82-2

MRID No.: NA 40 CFR: §180.473

FROM: William H. Donovan, Ph.D., Chemist

Risk Assessment Branch V

Health Effects Division (HED) (7509P)

THROUGH: Douglas Dotson, Ph.D., Chemist

Kristin Rury, MPH, Biologist

Dietary Exposure Science Advisory Council (DESAC)

Health Effects Division (HED) (7509P)

TO: Kathryn Montague, RM Team 23

Sidney Jackson/Barbara Madden, RM Team 05

Registration Division (RD) (7505P)

and

Katie Weyrauch, Risk Manager Reviewer

Tom Myers, Risk Manager 

Pesticide Re-Evaluation Division (PRD) (7508P)
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Executive Summary

The purpose of this memorandum is to report the results of revised acute and chronic aggregate 

dietary (food + drinking water) exposure analyses for the herbicide glufosinate ammonium,

including all currently registered uses and the proposed uses. Revisions were made to the most 

recent dietary exposure analysis for glufosinate ammonium (D384486, W. Donovan, 01-DEC2010) to include updated estimated drinking water concentrations (EDWCs) provided by EFED 

(D387412, C. Peck, 30-MAY-2012). In these analyses, the acute and chronic dietary exposure 

and risk estimates resulting from food and water intake were determined for the general U.S. 

population and various population subgroups.

Acute and chronic dietary risk assessments were conducted using the Dietary Exposure 

Evaluation Model DEEM-FCIDTM, Version 3.10, which uses food consumption data from the 

U.S. Department of Agriculture’s National Health and Nutrition Examination Survey/“What We 

Eat in America” (NHANES/WWEIA) dietary survey conducted in 2003-2008. These analyses 

were performed to support a Section 3 request for use of glufosinate ammonium in/on Citrus 

Fruits (Crop Group 10), Pome Fruits (Crop Group 11), Stone Fruits (Crop Group 12), olives, and 

sweet corn.

Acute Dietary (Food + Drinking Water) Exposure Results and Characterization

HED recently determined the doses and endpoints for use in human health risk assessments for 

glufosinate ammonium taking into account all available toxicity studies. An endpoint was 

identified for assessing acute dietary exposure for only the female 13-49 years old population 

subgroup; therefore, no acute dietary risk assessment was performed for any other population 

subgroups. Making use of tolerance level residues, default processing factors and 100% crop 

treated (% CT) assumptions, an unrefined acute dietary analysis (food and drinking water) for 

glufosinate ammonium showed that the females 13-49 year old population subgroup occupied 

39% of the acute population adjusted dose (aPAD). 

Chronic Dietary (Food + Drinking Water) Exposure Results and Characterization

The chronic dietary exposure assessment for glufosinate ammonium is refined using anticipated 

residues based on average field trial residue for crops as well as livestock commodities. Percent 

crop treated information and processing factors, where available, were also used in the 

assessment. 

At an EDWC of 95 ppb (based on the rice use), the chronic dietary risk estimates are below

HED’s level of concern (i.e. <100% of the chronic population adjusted doses (cPAD)) for all 

population subgroups. The highest exposed population subgroup was all infants (<1 year old) at 

98% of the cPAD, and the general US population occupied 39% of the cPAD. Potential residues 

in drinking water account for most of the exposure.
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Cancer Exposure Results and Characterization

HED classified glufosinate ammonium as “not likely to be carcinogenic to humans” based on the 

absence of significant tumor increases in two adequate rodent carcinogenicity studies; therefore, 

no human cancer risk assessment was performed. 

I. Introduction

Dietary risk assessment incorporates both exposure and toxicity of a given pesticide. For acute 

and chronic assessments, the risk is expressed as a percentage of a maximum acceptable dose 

(i.e., the dose which HED has concluded will result in no unreasonable adverse health effects). 

This dose is referred to as the population adjusted dose (PAD). The PAD is equivalent to point 

of departure (POD, NOAEL, LOAEL, e.g.) divided by the required uncertainty or safety factors. 

For acute and non-cancer chronic exposures, HED is concerned when estimated dietary risk 

exceeds 100% of the PAD. References which discuss the acute and chronic risk assessments in 

more detail are available on the EPA/pesticides web site: “Available Information on Assessing 

Exposure from Pesticides, A User’s Guide,” 6/21/2000, web link: 

http://www.epa.gov/fedrgstr/EPA-PEST/2000/July/Day-12/6061.pdf ; or see SOP 99.6 (8/20/99).

II. Residue Information

Tolerances: Permanent tolerances are established for residues of glufosinate ammonium in/on a 

variety of commodities at levels ranging from 0.05 ppm in/on grape to 25 ppm in/on aspirated 

grain fractions [40 CFR §180.473(a)]. Also, rotational crop tolerances are listed under 40 CFR 

§180.473(d). However, with the exception of teosinte and triticale, these tolerances are limited 

to livestock feedstuffs, and are accounted for in the dietary burden calculation for livestock. 

Triticale is included directly in the dietary analysis; teosinte is not included in DEEM.

Residue of Concern: HED previously concluded that the residues of concern for tolerance 

enforcement and risk assessment for both plant and livestock commodities are glufosinate 

ammonium, N-acetyl-glufosinate (HOE 099730), and 3-hydoxymethylphosphinyl-propionic acid 

(MPP or HOE 061517) (D282757, T. Bloem, 09-MAY-2002). As metabolism studies are 

available for a variety of nontransgenic crops (corn, soybean, apple, and lettuce) and transgenic 

crops (corn, soybean, sugar beet, canola, and rice), the results from these metabolism studies 

may be translated to pome fruit, stone fruit, citrus fruit, olive, and sweet corn. 

For drinking water, the residue of concern is glufosinate ammonium. MPP (HOE 061517) is 

likely less toxic than the parent compound and should not be aggregated with the parent. If MPP 

EDWCs are not significantly greater than those for glufosinate (>4-5X), the risk assessment for 

the parent will be protective of any toxicity associated with exposure to MPP in drinking water,

and a quantitative risk assessment for MPP will not be required (D397644, I. NegronEncarnacion, 29-MAR-2012). Thus, EFED provided EDWC estimates for both glufosinate 

ammonium and MPP (Section III).
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Residue Data Used for Acute Assessment: Tolerance level residues were used for the acute 

analysis, along with default processing factors, and 100% CT assumptions (unrefined analysis). 

The following recommended tolerance levels were used for the proposed new use crops: citrus 

fruit, 0.15 ppm; pome fruit, 0.25 ppm; stone fruit, 0.25 ppm; olive, 0.15 ppm; and sweet corn, 

0.25 ppm (D372625, I. Negron-Encarnacion, 31-AUG-2010).

Residue Data Used for Chronic Assessment: The DEEM-FCID chronic analysis was 

performed using anticipated residues (ARs) derived from average field trial residue levels, 

experimentally determined processing factors, and updated % CT information as summarized in 

Table 1. For commodities bearing no detectable residues in the field trials (e.g., tree nuts, 

grapes, apples, citrus, olives, peaches and nectarines), the anticipated residue was taken to be 1⁄2 

the tolerance level or recommended tolerance level. This is a conservative estimate of the 

average residue level, but provides a degree of refinement beyond use of the full tolerance level. 

See Attachment 5 for dietary burden calculations (from D372625, I. Negron-Encarnacion, 31-

AUG-2010) and derivation of the AR values for meat, milk, poultry and egg (MMPE) 

commodities. A search of the USDA PDP database showed no results for glufosinate 

ammonium for any commodity within the last five years. Therefore, neither fish nor shellfish 

were included in the present analyses.

Anticipated Residues and Processing Factors: 

Table 1. Anticipated Residues and Processing Factors Used in Chronic Dietary Analysis.

Commodity Residue Processing Factor Reference

Beet, sugar 0.24 0.10

D257628, T. Bloem, 9-JUL-1999

Beet, sugar, molasses 0.24 6.8

Potato, chip 0.19 2.3

Potato, dry and flour 0.19 3.0

Potato, tuber 0.19 1.0

Soybean (all commodities 

except oil)

0.77 1.0 D211531, M. Rodriguez, 7-MAR-1996

Soybean, oil 0.77 0.75 D211531, M. Rodriguez, 7-MAR-1996

Citrus Fruit (CG 10)

Incl. juice, oil

0.075 1 1⁄2 recommended tolerance level; 

47915701.der (residue)

47915706.der (PF)

Apple (except juice)

Crabapple

0.025 Apple, dried 8.0 1⁄2 tolerance level; Default PF

Apple juice 0.025 1 PP8F3607, J. Garbus, 14-OCT-1988

Pear (except juice) 0.155 Pear, dried 6.25 47915702.der (residue); Default PF

Pear juice 0.155 1 47915702.der (residue)

Loquat, quince 0.155 1 47915702.der (residue); Default PF

Cherry (except juice), apricot 0.156 1 47915703.der (residue)

Cherry juice 0.156 1.5 Default PF

Apricot, dried 0.156 6 Default PF

Peach and nectarine 0.075 1 1⁄2 recommended tolerance level; 

47915705.der (residue)

Peach, dried 0.075 7.0 Default PF

Plum (except juice) 0.153 1.8 ( dried prune) 47915703.der (residue); 47915707.der 

(PF)

Plum – prune juice 0.153 1.4 Default PF

Bushberry subgroup 13B 0.055 1 D271110, T. Bloem, 20-JUN-2002

Tree Nuts CG 14 0.05 1 1⁄2 tolerance level; default PF
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Commodity Residue Processing Factor Reference

Corn, field (all commodities 

except syrup)

0.05 1 D211531, M. Rodriguez, 7-MAR-1996

Corn, field, syrup 0.05 1.5 Default PF

Corn, sweet 0.11 1 47828201.der &

47828202.der

Rice (all commodities except 

bran)

0.20 1.3 45204406.der (residues)

45204408.der (PF)

Rice, bran 0.20 0.9 45204408.der (PF)

Triticale, flour 0.20 1 1⁄2 tolerance level; default PF

Rapeseed, oil 0.20 1 1⁄2 tolerance level; default PF

Beef*, meat 0.0059 1

See Attachment 5

Beef*, meat, dried 0.0059 1.92

Beef*, meat byproducts 0.96 1

Beef*, fat 0.065 1

Beef*, kidney 0.30 1

Beef*, liver 0.96 1

Pork, meat 0.00059 1

Pork, skin 0.096 1

Pork, meat byproducts 0.096 1

Pork, fat 0.0065 1

Pork, kidney 0.03 1

Pork, liver 0.096 1

Milk (all fractions) 0.0068 1

Meat, game 0.0059 1

Rabbit, meat 0.0059 1

Chicken**, meat 0.0071 1

Chicken**, liver 0.014 1

Chicken**, meat byproducts 0.046 1

Chicken**, fat 0.0071 1

Chicken**, skin 0.0071 1

Egg (all fractions) 0.0071 1

Water 0.095 (rice) 1 D387412, C. Peck, 30-MAY-2012

Banana/plantain 0.08 1 D172878, M. Rodriguez

Banana/plantain, dried 0.08 3.9 Default PF

Cottonseed, oil 1.12 0.01 45089303.der (residues)

45089302.der (PF)

Grape (all except raisin) 0.025 1 1⁄2 tolerance level; default PF

Juice PF: PP8F3607, J. Garbus, 14-

OCT-1988

Grape, raisin 0.025 1 PP8F3607, J. Garbus, 14-OCT-1988

(PF)

Olive 0.075 1 1⁄2 recommended tolerance level; 

47915704.der

Olive oil 0.075 0.6 47915708.der

*Same for Goat, Horse, and Sheep

**Same for Turkey and Poultry

Percent Crop Treated: A Screening Level Usage Analysis (SLUA) for glufosinate ammonium

was provided by BEAD for an analysis run on 19-MAR-2012 (see Attachment 6). The average

% CT values used for estimating chronic dietary exposures are listed in Table 2. One hundred 

percent crop treated values were used for all proposed new uses since no projected percent crop 
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treated values were provided. The acute analysis was unrefined, assuming 100% CT for all 

commodities.

Table 2. Average percent crop treated values used in the chronic dietary analysis.

Crop Avg % CT Crop Avg %CT

Almond 15 Walnut 10

Blueberry 5 Canola/Rapeseed 25

Corn, field 5 Cotton 5

Grape 15 Filbert 10

Pecan 1 Pistachio 20

Potato 10 Rice 1

Soybean 1

III. Drinking Water Data

The drinking water residues used in the dietary risk assessment were provided by EFED (DP

387412, C. Peck, 5/30/2012) and incorporated directly into the dietary assessment. Water 

residues were incorporated in the DEEM-FCID into the food categories “water, direct, all 

sources” and “water, indirect, all sources.” 

EFED estimated acute EDWCs for glufosinate-ammonium and MPP using the refined Tier I 

Rice Model and Pesticide Flooded Application Model (PFAM) [version 0.70] without the index 

reservoir. To estimate chronic EDWCs, the acute concentrations from PFAM without the index 

reservoir were allowed to degrade over a 365-day period, using the aerobic aquatic degradation 

half-lives, and the average concentration over the one-year period was calculated. Using this 

method, chronic values are approximately 76% and 3% lower than the acute values for 

glufosinate-ammonium and MPP, respectively. 

Previous analyses from EFED demonstrated that the maximum acute and chronic EDWCs for 

glufosinate ammonium arise from the rice uses; these values being nearly an order of magnitude 

higher than the values from any other crop use of glufosinate ammonium (DP 372624, C. Peck, 

6/22/2010 & DP 381992, C. Peck, 10/20/2010). Thus, EFED conducted a comprehensive 

refinement of the drinking water assessment for the rice use of glufosinate ammonium, with the 

expectation that the resulting values should be protective of other uses. 

Table 3 summarizes the PFAM EDWCs for glufosinate ammonium and MPP based on the rice 

use patterns, as provided by EFED. Most of the application scenarios result in lower values for 

MPP than for glufosinate ammonium, although the maximum chronic EDWC for MPP is 

approximately 2x higher than the corresponding value for glufosinate ammonium. Because 

glufosinate ammonium is considerably more toxic than MPP, and these compounds have 

sufficient differences in toxicity that precludes aggregation, parent EDWCs are protective of 

MPP EDWCs. Accordingly, the acute and chronic dietary analyses included the highest 

glufosinate ammonium EDWCs of 390 and 95 ppb, respectively.
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Table 3. EDWCs for glufosinate-ammonium use on rice derived using PFAM (maximum 

values appear in bold)

Use rate, Number of apps, retreatment interval, 

water holding period, application timing

Acute EDWC 

(μg/L)

Chronic EDWC1(μg/L)

4” 8” 4” 8”

Glufosinate-ammonium

1.46 lbs ai/acre, 1, NA, 7 days, dry 173 86 42 21

0.73 lbs ai/acre, 2, 10, 30, dry and flooded2 NA 320 NA 78

0.73 lbs ai/acre, 2, 10, 55, dry and flooded2

390 NA 95 NA

0.89 lbs ai/acre, 1, NA, 7 days, dry 106 53 26 13

0.66 lbs ai/acre, 1, NA, 7 days, dry 74 38 18 9

0.44 lbs ai/acre, 2, 10 days, 7 days, dry 88 45 22 11

0.44 lbs ai/acre, 2, 10 days,7 days, flooded NA 375 NA 92

MPP

1.46 lbs ai/acre, 1, NA, 7 days, dry 5.7 2.9 5.5 2.8

0.73 lbs ai/acre, 2, 10, 30, dry and flooded2 NA 88 NA 85

0.73 lbs ai/acre, 2, 10, 55, dry and flooded2183 NA 177 NA

0.89 lbs ai/acre, 1, NA, 7 days, dry 3.5 1.8 3.4 1.7

0.66 lbs ai/acre, 1, NA, 7 days, dry 2.2 1.1 2.1 1.1

0.44 lbs ai/acre, 2, 10 days, 7 days, dry 3.0 1.5 2.9 1.5

0.44 lbs ai/acre, 2, 10 days,7 days, flooded NA 45 NA 44

1. Chronic EDWC calculated by taking acute EDWC and allowing it to degrade for 365 days, using the aerobic aquatic 

degradation half-life, and then taking the average value over the 365-day period.

2. For this scenario the first application is made to a dry field, while the second application is made to a flooded field.

NA – not allowed.

IV. DEEM-FCIDTM Program and Consumption Information

Glufosinate ammonium acute and chronic dietary exposure assessments were conducted using 

the Dietary Exposure Evaluation Model software with the Food Commodity Intake Database 

DEEM-FCIDTM, Version 3.10 which incorporates consumption data from USDA’s National 

Health and Nutrition Examination Survey/“What We Eat in America” (NHANES/WWEIA) 

dietary survey conducted in 2003-2008. The 2003-2008 data are based on the reported 

consumption of individuals over two non-consecutive survey days. Foods “as consumed” (e.g., 

apple pie) are linked to EPA-defined food commodities (e.g. apples, peeled fruit - cooked; fresh 

or N/S; baked; or wheat flour - cooked; fresh or N/S, baked) using publicly available recipe 

translation files developed jointly by USDA/ARS and EPA. For chronic exposure assessment, 

consumption data are averaged for the entire U.S. population and within population subgroups, 

but for acute exposure assessment are retained as individual consumption events. Based on 

analysis of the 2003-2008 WWEIA consumption data, which took into account dietary patterns 

and survey respondents, HED concluded that it is most appropriate to report risk for the 

following population subgroups: the general U.S. population, all infants (<1 year old), children 

1-2, children 3-5, children 6-12, youth 13-19, adults 20-49, females 13-49, and adults 50+ years 

old.

For chronic dietary exposure assessment, an estimate of the residue level in each food or foodform (e.g., orange or orange juice) on the food commodity residue list is multiplied by the 

average daily consumption estimate for that food/food form to produce a residue intake estimate. 

The resulting residue intake estimate for each food/food form is summed with the residue intake 

estimates for all other food/food forms on the commodity residue list to arrive at the total 
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average estimated exposure. Exposure is expressed in mg/kg body weight/day and as a percent 

of the cPAD. This procedure is performed for each population subgroup.

For acute exposure assessments, individual one-day food consumption data are used on an 

individual-by-individual basis. The reported consumption amounts of each food item can be 

multiplied by a residue point estimate and summed to obtain a total daily pesticide exposure for a 

deterministic exposure assessment, or “matched” in multiple random pairings with residue values 

and then summed in a probabilistic assessment. The resulting distribution of exposures is 

expressed as a percentage of the aPAD on both a user (i.e., only those who reported eating 

relevant commodities/food forms) and a per-capita (i.e., those who reported eating the relevant 

commodities as well as those who did not) basis. In accordance with HED policy, per capita 

exposure and risk are reported for all tiers of analysis. However, any significant differences in 

user vs. per capita exposure and risk are specifically identified and noted in the risk assessment.

V. Toxicological Information

In a meeting held 10-JUN-2010, the Toxicology Science Advisory Council (ToxSAC) updated 

the glufosinate ammonium doses and endpoints (J. Kidwell, Glufosinate Ammonium ToxSAC 

Report, 29-JUL-2010). 

No endpoint was identified in the toxicological database to estimate risk to the general 

population from a single dose administration of glufosinate ammonium. However, an acute 

dietary endpoint for females 13-50 years old was selected based on fetal deaths in the 

developmental toxicity study in rabbits, resulting in an aPAD of 0.063 mg/kg. For chronic 

dietary exposure, a weight of evidence approach from several studies was used to select a 

NOAEL of 6 mg/kg/day together with a total uncertainty factor of 1000x. HED classified 

glufosinate ammonium as “not likely to be carcinogenic to humans.” As such, a cancer dietary

risk assessment is not warranted.

The doses relevant to dietary exposure are summarized in Table 4, below.

Table 4. Summary of Toxicological Doses and Endpoints for Glufosinate Ammonium for Use in Dietary Risk 

Assessments

Exposure/

Scenario

Point of 

Departure

Uncertainty/

FQPA Safety 

Factors

RfD, PAD, Level 

of Concern for 

Risk Assessment

Study and Toxicological Effects

Acute Dietary 

(Females 13-

50 only)

NOAEL = 

6.3 mg/kg

UFA=10X

UFH=10X

FQPA SF=1X

Acute RfD 

=0.063

mg/kg/day

aPAD = 0.063 

mg/kg

Developmental Toxicity Study in Rabbits

LOAEL = 20 mg/kg/day based on 

increased fetal death.

Acute Dietary 

(General 

Population 

including 

infants and 

children)

NA NA NA

No endpoint attributable to a single 

exposure was identified for the general 

population, including infants and children.
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Table 4. Summary of Toxicological Doses and Endpoints for Glufosinate Ammonium for Use in Dietary Risk 

Assessments

Exposure/

Scenario

Point of 

Departure

Uncertainty/

FQPA Safety 

Factors

RfD, PAD, Level 

of Concern for 

Risk Assessment

Study and Toxicological Effects

Chronic 

Dietary (All 

Populations)

NOAEL= 

6.0

mg/kg/day

UFA= 10x

UFH=10x

UFS = 10x

FQPA SF= 1x

Total UF = 1000 

Chronic RfD 

=0.006

mg/kg/day

cPAD =0.006

mg/kg/day

“Weight of Evidence” approach from 4 

studies, including DNT.

LOAEL is based on brain glutamine 

synthetase inhibition, alterations in the 

electrocardiogram, and changes in brain 

morphometry at PND 72.

Cancer (oral, 

dermal, 

inhalation)

Classification: “Not likely to be Carcinogenic to Humans” based on the absence of significant 

tumor increases in two adequate rodent carcinogenicity studies.

Point of Departure (POD) = A data point or an estimated point that is derived from observed dose-response data and 

used to mark the beginning of extrapolation to determine risk associated with lower environmentally relevant human 

exposures. NOAEL = no observed adverse effect level. LOAEL = lowest observed adverse effect level. UF = 

uncertainty factor. UFA = extrapolation from animal to human (interspecies). UFH = potential variation in 

sensitivity among members of the human population (intraspecies). UFS = use of a short-term study for long-term

risk assessment. FQPA SF= FQPA Safety Factor. PAD = population adjusted dose (a = acute, c = chronic). RfD = 

reference dose. N/A = not applicable. 

VI. Results/Discussion 

As stated above, for acute and chronic dietary assessments, HED is concerned when dietary risk 

exceeds 100% of the PAD. The DEEM-FCID analyses estimate the dietary exposure of the 

US population and various population subgroups. The results reported in Table 5 (below) are for 

the general US population (total), all infants <1, children 1-2, children 3-5, children 6-12, youths 

13-19, females 13-49, adults 20-49, and adults 50+ years old for chronic exposure; while for 

acute exposure only the female 13-49 years old population subgroup is reported. 

Results of Acute Dietary Exposure Analysis: An unrefined acute dietary risk assessment for 

glufosinate ammonium at the EDWC of 390 ppb showed that acute dietary risk estimates are 

below HED’s level of concern (i.e. <100% aPAD) for females 13-49 years old (39% aPAD). 

Results of Chronic Dietary Exposure Analysis: The chronic dietary risk assessment for 

glufosinate ammonium at the EDWC of 95 ppb showed that chronic dietary risk estimates are 

below HED’s level of concern (i.e. <100% cPAD) for all population subgroups; in particular, 

All infants (<1 year old), the highest exposed population subgroup (98% of the cPAD), and the 

US Population (39% of the cPAD).

The results of the dietary exposure analyses are reported in Table 5.
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Table 5. Summary of Dietary Exposure and Risk for Glufosinate Ammonium [Acute EDWC of 390 ppb, 

Chronic EDWC of 95 ppb]. 

Population Subgroup1

DEEM Acute Dietary Analysis,

95th Percentile

DEEM Chronic Dietary Analysis

Exposure 

(mg/kg/day)

% aPAD Exposure 

(mg/kg/day)

% cPAD

General U.S. Population

NA2 NA2

0.002324 39

All Infants (< 1 year old) 0.005887 98

Children 1-2 years old 0.004387 73

Children 3-5 years old 0.003447 57

Children 6-12 years old 0.002261 38

Youth 13-19 years old 0.001706 28

Adults 20-49 years old 0.002203 37

Adults 50-99 years old 0.002202 37

Females 13-49 years old 0.024401 39 0.002195 37

1 Values for the population with the highest risk for each type of risk assessment are bolded. 

2 NA = Not Applicable; no acute dietary endpoint was identified for these population subgroups.

VII. Characterization of Inputs/Outputs

The acute dietary exposure assessment for glufosinate ammonium is unrefined, making use of 

tolerance level residues and 100% crop treated assumptions for all crops and livestock 

commodities. This conservative analysis proved adequate, as the only relevant population 

subgroup, females 13-49 years old, occupied 39% aPAD.

The chronic dietary exposure assessment for glufosinate ammonium is refined using anticipated 

residues based on average field trial residue levels for plant raw agricultural commodities 

(RACs), % CT information where available, and experimentally-determined processing factors. 

Additionally, ARs in livestock commodities were calculated assuming dietary burdens computed 

from average field trial residue levels in the feed items together with a reasonably balanced diet 

as specified in the most recent guidance document (Table 1 Feedstuffs (June 2008)). The 

assessment could be further refined if projected percent crop treated information became 

available for the proposed new crop uses.
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VIII. Conclusions

The primary contributor to dietary exposure is drinking water. For the acute exposure scenario, 

females 13-49 years old occupied 39% aPAD, and are below HED’s level of concern using an 

unrefined analysis. When using chronic EDWC levels determined by EFED based on the rice 

use, risk levels below HED’s level of concern are calculated for the chronic exposure scenario

for all population subgroups. The highest exposed population subgroup, all infants (<1 year old), 

results in a % cPAD value of 98, while the US Population occupies 39% cPAD. 

IX. List of Attachments

Attachment 1: Acute Food plus Water Residue Input File at an EDWC of 390 ppb

Attachment 2: Acute Results File at an EDWC of 390 ppb

Attachment 3: Chronic Food plus Water Residue Input File at an EDWC of 95 ppb

Attachment 4: Chronic Results File at an EDWC of 95 ppb

Attachment 5: Dietary Burden and Livestock AR Calculations for Glufosinate Ammonium

Attachment 6: Glufosinate Ammonium SLUA dated 19-MAR-2012
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Attachment 1: Acute Food plus Water Residue Input File at an EDWC of 390 ppb

Filename: C:\Documents and Settings\wdonovan\My Documents\CalendexWWEIAFCID\128850a.R08

Chemical: glufosinate ammonium

RfD(Chronic): .006 mg/kg bw/day NOEL(Chronic): 0 mg/kg bw/day

RfD(Acute): .063 mg/kg bw/day NOEL(Acute): 0 mg/kg bw/day

Date created/last modified: 06-19-2012/08:02:29 Program ver. 3.10

Comment: acute EDWC 390 ppb 30may12

--------------------------------------------------------------------------------

 EPA Crop Def Res Adj.Factors Comment

 Code Grp Commodity Name (ppm) #1 #2 

---------- ---- ------------------------------- ---------- ------ ------ -------

0101052000 1A Beet, sugar 0.900000 1.000 1.000 

0101052001 1A Beet, sugar-babyfood 0.900000 1.000 1.000 

0101053000 1A Beet, sugar, molasses 5.000000 1.000 1.000 

0101053001 1A Beet, sugar, molasses-babyfood 5.000000 1.000 1.000 

0103296000 1C Potato, chips 1.600000 1.000 1.000 

0103297000 1C Potato, dry (granules/ flakes) 2.000000 1.000 1.000 

0103297001 1C Potato, dry (granules/ flakes)-b 2.000000 1.000 1.000 

0103298000 1C Potato, flour 2.000000 1.000 1.000 

0103298001 1C Potato, flour-babyfood 2.000000 1.000 1.000 

0103299000 1C Potato, tuber, w/peel 0.800000 1.000 1.000 

0103299001 1C Potato, tuber, w/peel-babyfood 0.800000 1.000 1.000 

0103300000 1C Potato, tuber, w/o peel 0.800000 1.000 1.000 

0103300001 1C Potato, tuber, w/o peel-babyfood 0.800000 1.000 1.000 

0600347000 6 Soybean, seed 2.000000 1.000 1.000 

0600349000 6 Soybean, soy milk 2.000000 1.000 1.000 

0600349001 6 Soybean, soy milk-babyfood or in 2.000000 1.000 1.000 

0600350000 6 Soybean, oil 2.000000 1.000 1.000 

0600350001 6 Soybean, oil-babyfood 2.000000 1.000 1.000 

0603348000 6C Soybean, flour 2.000000 1.000 1.000 

0603348001 6C Soybean, flour-babyfood 2.000000 1.000 1.000 

1001106000 10A Citron 0.150000 1.000 1.000 

1001107000 10A Citrus hybrids 0.150000 1.000 1.000 

1001108000 10A Citrus, oil 0.150000 1.000 1.000 

1001240000 10A Orange 0.150000 1.000 1.000 

1001241000 10A Orange, juice 0.150000 1.800 1.000 

1001241001 10A Orange, juice-babyfood 0.150000 1.800 1.000 

1001242000 10A Orange, peel 0.150000 1.000 1.000 

1001369000 10A Tangerine 0.150000 1.000 1.000 

1001370000 10A Tangerine, juice 0.150000 2.300 1.000 

1002197000 10B Kumquat 0.150000 1.000 1.000 

1002199000 10B Lemon 0.150000 1.000 1.000 

1002200000 10B Lemon, juice 0.150000 2.000 1.000 

1002200001 10B Lemon, juice-babyfood 0.150000 2.000 1.000 

1002201000 10B Lemon, peel 0.150000 1.000 1.000 

1002206000 10B Lime 0.150000 1.000 1.000 

1002207000 10B Lime, juice 0.150000 2.000 1.000 

1002207001 10B Lime, juice-babyfood 0.150000 2.000 1.000 

1003180000 10C Grapefruit 0.150000 1.000 1.000 

1003181000 10C Grapefruit, juice 0.150000 2.100 1.000 

1003307000 10C Pummelo 0.150000 1.000 1.000 

1100007000 11 Apple, fruit with peel 0.250000 1.000 1.000 

1100008000 11 Apple, peeled fruit 0.250000 1.000 1.000 

1100008001 11 Apple, peeled fruit-babyfood 0.250000 1.000 1.000 

1100009000 11 Apple, dried 0.250000 8.000 1.000 

1100009001 11 Apple, dried-babyfood 0.250000 8.000 1.000 

1100010000 11 Apple, juice 0.250000 1.300 1.000 

1100010001 11 Apple, juice-babyfood 0.250000 1.300 1.000 

1100011000 11 Apple, sauce 0.250000 1.000 1.000 

1100011001 11 Apple, sauce-babyfood 0.250000 1.000 1.000 

1100129000 11 Crabapple 0.250000 1.000 1.000 

1100210000 11 Loquat 0.250000 1.000 1.000 

1100266000 11 Pear 0.250000 1.000 1.000 

1100266001 11 Pear-babyfood 0.250000 1.000 1.000 

1100267000 11 Pear, dried 0.250000 6.250 1.000 

1100268000 11 Pear, juice 0.250000 1.000 1.000 

1100268001 11 Pear, juice-babyfood 0.250000 1.000 1.000 

1100310000 11 Quince 0.250000 1.000 1.000 

1201090000 12A Cherry 0.250000 1.000 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 13 of 27

1201090001 12A Cherry-babyfood 0.250000 1.000 1.000 

1201091000 12A Cherry, juice 0.250000 1.500 1.000 

1201091001 12A Cherry, juice-babyfood 0.250000 1.500 1.000 

1202012000 12B Apricot 0.250000 1.000 1.000 

1202012001 12B Apricot-babyfood 0.250000 1.000 1.000 

1202013000 12B Apricot, dried 0.250000 6.000 1.000 

1202014000 12B Apricot, juice 0.250000 1.000 1.000 

1202014001 12B Apricot, juice-babyfood 0.250000 1.000 1.000 

1202230000 12B Nectarine 0.250000 1.000 1.000 

1202260000 12B Peach 0.250000 1.000 1.000 

1202260001 12B Peach-babyfood 0.250000 1.000 1.000 

1202261000 12B Peach, dried 0.250000 7.000 1.000 

1202261001 12B Peach, dried-babyfood 0.250000 7.000 1.000 

1202262000 12B Peach, juice 0.250000 1.000 1.000 

1202262001 12B Peach, juice-babyfood 0.250000 1.000 1.000 

1203285000 12C Plum 0.250000 1.000 1.000 

1203285001 12C Plum-babyfood 0.250000 1.000 1.000 

1203286000 12C Plum, prune, fresh 0.250000 1.000 1.000 

1203286001 12C Plum, prune, fresh-babyfood 0.250000 1.000 1.000 

1203287000 12C Plum, prune, dried 0.250000 5.000 1.000 

1203287001 12C Plum, prune, dried-babyfood 0.250000 5.000 1.000 

1203288000 12C Plum, prune, juice 0.250000 1.400 1.000 

1203288001 12C Plum, prune, juice-babyfood 0.250000 1.400 1.000 

1302057000 13B Blueberry 0.150000 1.000 1.000 

1302057001 13B Blueberry-babyfood 0.150000 1.000 1.000 

1302136000 13B Currant 0.150000 1.000 1.000 

1302137000 13B Currant, dried 0.150000 1.000 1.000 

1302149000 13B Elderberry 0.150000 1.000 1.000 

1302174000 13B Gooseberry 0.150000 1.000 1.000 

1302191000 13B Huckleberry 0.150000 1.000 1.000 

1304175000 13D Grape 0.050000 1.000 1.000 

1304176000 13D Grape, juice 0.050000 1.200 1.000 

1304176001 13D Grape, juice-babyfood 0.050000 1.200 1.000 

1304179000 13D Grape, wine and sherry 0.050000 1.000 1.000 

1400003000 14 Almond 0.100000 1.000 1.000 

1400003001 14 Almond-babyfood 0.100000 1.000 1.000 

1400004000 14 Almond, oil 0.100000 1.000 1.000 

1400004001 14 Almond, oil-babyfood 0.100000 1.000 1.000 

1400059000 14 Brazil nut 0.100000 1.000 1.000 

1400068000 14 Butternut 0.100000 1.000 1.000 

1400081000 14 Cashew 0.100000 1.000 1.000 

1400092000 14 Chestnut 0.100000 1.000 1.000 

1400155000 14 Hazelnut 0.100000 1.000 1.000 

1400156000 14 Hazelnut, oil 0.100000 1.000 1.000 

1400185000 14 Hickory nut 0.100000 1.000 1.000 

1400213000 14 Macadamia nut 0.100000 1.000 1.000 

1400269000 14 Pecan 0.100000 1.000 1.000 

1400282000 14 Pistachio 0.100000 1.000 1.000 

1400391000 14 Walnut 0.100000 1.000 1.000 

1500120000 15 Corn, field, flour 0.200000 1.000 1.000 

1500120001 15 Corn, field, flour-babyfood 0.200000 1.000 1.000 

1500121000 15 Corn, field, meal 0.200000 1.000 1.000 

1500121001 15 Corn, field, meal-babyfood 0.200000 1.000 1.000 

1500122000 15 Corn, field, bran 0.200000 1.000 1.000 

1500123000 15 Corn, field, starch 0.200000 1.000 1.000 

1500123001 15 Corn, field, starch-babyfood 0.200000 1.000 1.000 

1500124000 15 Corn, field, syrup 0.200000 1.500 1.000 

1500124001 15 Corn, field, syrup-babyfood 0.200000 1.500 1.000 

1500125000 15 Corn, field, oil 0.200000 1.000 1.000 

1500125001 15 Corn, field, oil-babyfood 0.200000 1.000 1.000 

1500127000 15 Corn, sweet 0.250000 1.000 1.000 

1500127001 15 Corn, sweet-babyfood 0.250000 1.000 1.000 

1500323000 15 Rice, white 1.000000 1.000 1.000 

1500323001 15 Rice, white-babyfood 1.000000 1.000 1.000 

1500324000 15 Rice, brown 1.000000 1.000 1.000 

1500324001 15 Rice, brown-babyfood 1.000000 1.000 1.000 

1500325000 15 Rice, flour 1.000000 1.000 1.000 

1500325001 15 Rice, flour-babyfood 1.000000 1.000 1.000 

1500326000 15 Rice, bran 1.000000 1.000 1.000 

1500326001 15 Rice, bran-babyfood 1.000000 1.000 1.000 

1500381000 15 Triticale, flour 0.400000 1.000 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 14 of 27

1500381001 15 Triticale, flour-babyfood 0.400000 1.000 1.000 

2001319000 20A Rapeseed, oil 0.400000 1.000 1.000 

2001319001 20A Rapeseed, oil-babyfood 0.400000 1.000 1.000 

2003128000 20C Cottonseed, oil 4.000000 1.000 1.000 

2003128001 20C Cottonseed, oil-babyfood 4.000000 1.000 1.000 

3100044000 31 Beef, meat 0.150000 1.000 1.000 

3100044001 31 Beef, meat-babyfood 0.150000 1.000 1.000 

3100045000 31 Beef, meat, dried 0.150000 1.920 1.000 

3100046000 31 Beef, meat byproducts 6.000000 1.000 1.000 

3100046001 31 Beef, meat byproducts-babyfood 6.000000 1.000 1.000 

3100047000 31 Beef, fat 0.400000 1.000 1.000 

3100047001 31 Beef, fat-babyfood 0.400000 1.000 1.000 

3100048000 31 Beef, kidney 6.000000 1.000 1.000 

3100049000 31 Beef, liver 6.000000 1.000 1.000 

3100049001 31 Beef, liver-babyfood 6.000000 1.000 1.000 

3200169000 32 Goat, meat 0.150000 1.000 1.000 

3200170000 32 Goat, meat byproducts 6.000000 1.000 1.000 

3200171000 32 Goat, fat 0.400000 1.000 1.000 

3200172000 32 Goat, kidney 6.000000 1.000 1.000 

3200173000 32 Goat, liver 6.000000 1.000 1.000 

3300189000 33 Horse, meat 0.150000 1.000 1.000 

3400290000 34 Pork, meat 0.150000 1.000 1.000 

3400290001 34 Pork, meat-babyfood 0.150000 1.000 1.000 

3400291000 34 Pork, skin 6.000000 1.000 1.000 

3400292000 34 Pork, meat byproducts 6.000000 1.000 1.000 

3400292001 34 Pork, meat byproducts-babyfood 6.000000 1.000 1.000 

3400293000 34 Pork, fat 0.400000 1.000 1.000 

3400293001 34 Pork, fat-babyfood 0.400000 1.000 1.000 

3400294000 34 Pork, kidney 6.000000 1.000 1.000 

3400295000 34 Pork, liver 6.000000 1.000 1.000 

3500339000 35 Sheep, meat 0.150000 1.000 1.000 

3500339001 35 Sheep, meat-babyfood 0.150000 1.000 1.000 

3500340000 35 Sheep, meat byproducts 6.000000 1.000 1.000 

3500341000 35 Sheep, fat 0.400000 1.000 1.000 

3500341001 35 Sheep, fat-babyfood 0.400000 1.000 1.000 

3500342000 35 Sheep, kidney 6.000000 1.000 1.000 

3500343000 35 Sheep, liver 6.000000 1.000 1.000 

3600222000 36 Milk, fat 0.150000 1.000 1.000 

3600222001 36 Milk, fat-baby food/infant formu 0.150000 1.000 1.000 

3600223000 36 Milk, nonfat solids 0.150000 1.000 1.000 

3600223001 36 Milk, nonfat solids-baby food/in 0.150000 1.000 1.000 

3600224000 36 Milk, water 0.150000 1.000 1.000 

3600224001 36 Milk, water-babyfood/infant form 0.150000 1.000 1.000 

3600225001 36 Milk, sugar (lactose)-baby food/ 0.150000 1.000 1.000 

3800221000 38 Meat, game 0.150000 1.000 1.000 

3900312000 39 Rabbit, meat 0.150000 1.000 1.000 

4000093000 40 Chicken, meat 0.150000 1.000 1.000 

4000093001 40 Chicken, meat-babyfood 0.150000 1.000 1.000 

4000094000 40 Chicken, liver 0.600000 1.000 1.000 

4000095000 40 Chicken, meat byproducts 0.600000 1.000 1.000 

4000095001 40 Chicken, meat byproducts-babyfoo 0.600000 1.000 1.000 

4000096000 40 Chicken, fat 0.150000 1.000 1.000 

4000096001 40 Chicken, fat-babyfood 0.150000 1.000 1.000 

4000097000 40 Chicken, skin 0.600000 1.000 1.000 

4000097001 40 Chicken, skin-babyfood 0.600000 1.000 1.000 

5000382000 50 Turkey, meat 0.150000 1.000 1.000 

5000382001 50 Turkey, meat-babyfood 0.150000 1.000 1.000 

5000383000 50 Turkey, liver 0.600000 1.000 1.000 

5000383001 50 Turkey, liver-babyfood 0.600000 1.000 1.000 

5000384000 50 Turkey, meat byproducts 0.600000 1.000 1.000 

5000384001 50 Turkey, meat byproducts-babyfood 0.600000 1.000 1.000 

5000385000 50 Turkey, fat 0.150000 1.000 1.000 

5000385001 50 Turkey, fat-babyfood 0.150000 1.000 1.000 

5000386000 50 Turkey, skin 0.600000 1.000 1.000 

5000386001 50 Turkey, skin-babyfood 0.600000 1.000 1.000 

6000301000 60 Poultry, other, meat 0.150000 1.000 1.000 

6000302000 60 Poultry, other, liver 0.600000 1.000 1.000 

6000303000 60 Poultry, other, meat byproducts 0.600000 1.000 1.000 

6000304000 60 Poultry, other, fat 0.150000 1.000 1.000 

6000305000 60 Poultry, other, skin 0.600000 1.000 1.000 

7000145000 70 Egg, whole 0.150000 1.000 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 15 of 27

7000145001 70 Egg, whole-babyfood 0.150000 1.000 1.000 

7000146000 70 Egg, white 0.150000 1.000 1.000 

7000146001 70 Egg, white (solids)-babyfood 0.150000 1.000 1.000 

7000147000 70 Egg, yolk 0.150000 1.000 1.000 

7000147001 70 Egg, yolk-babyfood 0.150000 1.000 1.000 

8601000000 86A Water, direct, all sources 0.390000 1.000 1.000 

8602000000 86B Water, indirect, all sources 0.390000 1.000 1.000 

9500023000 O Banana 0.300000 1.000 1.000 

9500023001 O Banana-babyfood 0.300000 1.000 1.000 

9500024000 O Banana, dried 0.300000 3.900 1.000 

9500024001 O Banana, dried-babyfood 0.300000 3.900 1.000 

9500177000 O Grape, leaves 0.050000 1.000 1.000 

9500178000 O Grape, raisin 0.050000 4.300 1.000 

9500235000 O Olive 0.150000 1.000 1.000 

9500236000 O Olive, oil 0.150000 1.000 1.000 

9500283000 O Plantain 0.300000 1.000 1.000 

9500284000 O Plantain, dried 0.300000 3.900 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 16 of 27

Attachment 2: Acute Results File at an EDWC of 390 ppb.

 Ver. 3.10

DEEM-FCID ACUTE Analysis for GLUFOSINATE AMMONIUM NHANES 2003-2008

Residue file: 128850a.R08 Adjustment factor #2 NOT used.

Analysis Date: 06-19-2012/09:29:22 Residue file dated: 06-19-2012/08:02:29

Two-Day Average Results Reported

RAC/FF intake summed over 24 hours

Run Comment: "acute EDWC 390 ppb 30may12"

===============================================================================

Summary calculations--per capita:

 95th Percentile 99th Percentile 99.9th Percentile

Exposure % aRfD Exposure % aRfD Exposure % aRfD 

 ---------- -------- ---------- -------- ---------- --------

Female 13-49:

 0.024401 38.73 0.033361 52.95 0.043600 69.21 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 17 of 27

Attachment 3: Chronic Food plus Water Residue Input File at an EDWC of 95 ppb

Filename: C:\Documents and Settings\wdonovan\My Documents\CalendexWWEIAFCID\128850c.R08

Chemical: glufosinate ammonium

RfD(Chronic): .006 mg/kg bw/day NOEL(Chronic): 0 mg/kg bw/day

RfD(Acute): .063 mg/kg bw/day NOEL(Acute): 0 mg/kg bw/day

Date created/last modified: 05-29-2012/12:14:56 Program ver. 3.10

Comment: 95 ppb EDWC, 2012 SLUA

--------------------------------------------------------------------------------

 EPA Crop Def Res Adj.Factors Comment

 Code Grp Commodity Name (ppm) #1 #2 

---------- ---- ------------------------------- ---------- ------ ------ -------

0101052000 1A Beet, sugar 0.240000 0.100 1.000 avg re

 Full comment: avg res from fld trl and proc fact (D257628)

0101052001 1A Beet, sugar-babyfood 0.240000 0.100 1.000 avg re

 Full comment: avg res from fld trl and proc fact (D257628)

0101053000 1A Beet, sugar, molasses 0.240000 6.800 1.000 avg re

 Full comment: avg res from fld trl and proc fact (D257628)

0101053001 1A Beet, sugar, molasses-babyfood 0.240000 6.800 1.000 avg re

 Full comment: avg res from fld trl and proc fact (D257628)

0103296000 1C Potato, chips 0.190000 2.300 0.100 avg re

 Full comment: avg res from fld trl and proc factor (D257628)

0103297000 1C Potato, dry (granules/ flakes) 0.190000 3.000 0.100 avg re

 Full comment: avg res from fld trl and proc factor (D257628)

0103297001 1C Potato, dry (granules/ flakes)-b 0.190000 3.000 0.100 avg re

 Full comment: avg res from fld trl and proc factor (D257628)

0103298000 1C Potato, flour 0.190000 3.000 0.100 avg re

 Full comment: avg res from fld trl and proc factor (D257628)

0103298001 1C Potato, flour-babyfood 0.190000 3.000 0.100 avg re

 Full comment: avg res from fld trl and proc factor (D257628)

0103299000 1C Potato, tuber, w/peel 0.190000 1.000 0.100 avg re

 Full comment: avg res from fld trl

0103299001 1C Potato, tuber, w/peel-babyfood 0.190000 1.000 0.100 avg re

 Full comment: avg res from fld trl

0103300000 1C Potato, tuber, w/o peel 0.190000 1.000 0.100 avg re

 Full comment: avg res from fld trl

0103300001 1C Potato, tuber, w/o peel-babyfood 0.190000 1.000 0.100 avg re

 Full comment: avg res from fld trl

0600347000 6 Soybean, seed 0.770000 1.000 0.010 avg fi

 Full comment: avg field trial residue (D211531)

0600349000 6 Soybean, soy milk 0.770000 1.000 0.010 avg fi

 Full comment: avg field trial residue (D211531)

0600349001 6 Soybean, soy milk-babyfood or in 0.770000 1.000 0.010 avg fi

 Full comment: avg field trial residue (D211531)

0600350000 6 Soybean, oil 0.770000 0.750 0.010 avg fl

 Full comment: avg fld trl res and 0.75x proc factor (D211531)

0600350001 6 Soybean, oil-babyfood 0.770000 0.750 0.010 avg fl

 Full comment: avg fld trl res and 0.75x proc factor (D211531)

0603348000 6C Soybean, flour 0.770000 1.000 0.010 avg fi

 Full comment: avg field trial residue (D211531)

0603348001 6C Soybean, flour-babyfood 0.770000 1.000 0.010 avg fi

 Full comment: avg field trial residue (D211531)

1001106000 10A Citron 0.075000 1.000 1.000 

1001107000 10A Citrus hybrids 0.075000 1.000 1.000 

1001108000 10A Citrus, oil 0.075000 1.000 1.000 

1001240000 10A Orange 0.075000 1.000 1.000 

1001241000 10A Orange, juice 0.075000 1.000 1.000 

1001241001 10A Orange, juice-babyfood 0.075000 1.000 1.000 

1001242000 10A Orange, peel 0.075000 1.000 1.000 

1001369000 10A Tangerine 0.075000 1.000 1.000 

1001370000 10A Tangerine, juice 0.075000 1.000 1.000 

1002197000 10B Kumquat 0.075000 1.000 1.000 

1002199000 10B Lemon 0.075000 1.000 1.000 

1002200000 10B Lemon, juice 0.075000 1.000 1.000 

1002200001 10B Lemon, juice-babyfood 0.075000 1.000 1.000 

1002201000 10B Lemon, peel 0.075000 1.000 1.000 

1002206000 10B Lime 0.075000 1.000 1.000 

1002207000 10B Lime, juice 0.075000 1.000 1.000 

1002207001 10B Lime, juice-babyfood 0.075000 1.000 1.000 

1003180000 10C Grapefruit 0.075000 1.000 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 18 of 27

1003181000 10C Grapefruit, juice 0.075000 1.000 1.000 

1003307000 10C Pummelo 0.075000 1.000 1.000 

1100007000 11 Apple, fruit with peel 0.025000 1.000 1.000 

1100008000 11 Apple, peeled fruit 0.025000 1.000 1.000 

1100008001 11 Apple, peeled fruit-babyfood 0.025000 1.000 1.000 

1100009000 11 Apple, dried 0.025000 8.000 1.000 

1100009001 11 Apple, dried-babyfood 0.025000 8.000 1.000 

1100010000 11 Apple, juice 0.025000 1.000 1.000 proces

 Full comment: processing factor reduced to 1 (PP#8F3607)

1100010001 11 Apple, juice-babyfood 0.025000 1.000 1.000 proces

 Full comment: processing factor reduced to 1 (PP#8F3607)

1100011000 11 Apple, sauce 0.025000 1.000 1.000 

1100011001 11 Apple, sauce-babyfood 0.025000 1.000 1.000 

1100129000 11 Crabapple 0.025000 1.000 1.000 from a

 Full comment: from apple SOP 2000.1

1100210000 11 Loquat 0.155000 1.000 1.000 

1100266000 11 Pear 0.155000 1.000 1.000 D37262

 Full comment: D372625

1100266001 11 Pear-babyfood 0.155000 1.000 1.000 D37262

 Full comment: D372625

1100267000 11 Pear, dried 0.155000 6.250 1.000 D37262

 Full comment: D372625

1100268000 11 Pear, juice 0.155000 1.000 1.000 D37262

 Full comment: D372625

1100268001 11 Pear, juice-babyfood 0.155000 1.000 1.000 D37262

 Full comment: D372625

1100310000 11 Quince 0.155000 1.000 1.000 

1201090000 12A Cherry 0.156000 1.000 1.000 D37262

 Full comment: D372625

1201090001 12A Cherry-babyfood 0.156000 1.000 1.000 D37262

 Full comment: D372625

1201091000 12A Cherry, juice 0.156000 1.500 1.000 D37262

 Full comment: D372625

1201091001 12A Cherry, juice-babyfood 0.156000 1.500 1.000 D37262

 Full comment: D372625

1202012000 12B Apricot 0.156000 1.000 1.000 

1202012001 12B Apricot-babyfood 0.156000 1.000 1.000 

1202013000 12B Apricot, dried 0.156000 6.000 1.000 

1202014000 12B Apricot, juice 0.156000 1.000 1.000 

1202014001 12B Apricot, juice-babyfood 0.156000 1.000 1.000 

1202230000 12B Nectarine 0.075000 1.000 1.000 

1202260000 12B Peach 0.075000 1.000 1.000 

1202260001 12B Peach-babyfood 0.075000 1.000 1.000 

1202261000 12B Peach, dried 0.075000 7.000 1.000 

1202261001 12B Peach, dried-babyfood 0.075000 7.000 1.000 

1202262000 12B Peach, juice 0.075000 1.000 1.000 

1202262001 12B Peach, juice-babyfood 0.075000 1.000 1.000 

1203285000 12C Plum 0.153000 1.000 1.000 D37262

 Full comment: D372625

1203285001 12C Plum-babyfood 0.153000 1.000 1.000 D37262

 Full comment: D372625

1203286000 12C Plum, prune, fresh 0.153000 1.000 1.000 D37262

 Full comment: D372625

1203286001 12C Plum, prune, fresh-babyfood 0.153000 1.000 1.000 D37262

 Full comment: D372625

1203287000 12C Plum, prune, dried 0.153000 1.800 1.000 D37262

 Full comment: D372625

1203287001 12C Plum, prune, dried-babyfood 0.153000 1.800 1.000 D37262

 Full comment: D372625

1203288000 12C Plum, prune, juice 0.153000 1.400 1.000 D37262

 Full comment: D372625

1203288001 12C Plum, prune, juice-babyfood 0.153000 1.400 1.000 D37262

 Full comment: D372625

1302057000 13B Blueberry 0.055000 1.000 0.050 

1302057001 13B Blueberry-babyfood 0.055000 1.000 0.050 

1302136000 13B Currant 0.055000 1.000 1.000 

1302137000 13B Currant, dried 0.055000 1.000 1.000 

1302149000 13B Elderberry 0.055000 1.000 1.000 

1302174000 13B Gooseberry 0.055000 1.000 1.000 

1302191000 13B Huckleberry 0.055000 1.000 1.000 

1304175000 13D Grape 0.025000 1.000 0.150 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 19 of 27

1304176000 13D Grape, juice 0.025000 1.000 0.150 proces

 Full comment: processing factor reduced to 1 (PP#843607)

1304176001 13D Grape, juice-babyfood 0.025000 1.000 0.150 proces

 Full comment: processing factor reduced to 1 (PP#843607)

1304179000 13D Grape, wine and sherry 0.025000 1.000 0.150 

1400003000 14 Almond 0.050000 1.000 0.150 

1400003001 14 Almond-babyfood 0.050000 1.000 0.150 

1400004000 14 Almond, oil 0.050000 1.000 0.150 

1400004001 14 Almond, oil-babyfood 0.050000 1.000 0.150 

1400059000 14 Brazil nut 0.050000 1.000 1.000 

1400068000 14 Butternut 0.050000 1.000 1.000 

1400081000 14 Cashew 0.050000 1.000 1.000 

1400092000 14 Chestnut 0.050000 1.000 1.000 

1400155000 14 Hazelnut 0.050000 1.000 0.100 

1400156000 14 Hazelnut, oil 0.050000 1.000 0.100 

1400185000 14 Hickory nut 0.050000 1.000 1.000 

1400213000 14 Macadamia nut 0.050000 1.000 1.000 

1400269000 14 Pecan 0.050000 1.000 0.010 

1400282000 14 Pistachio 0.050000 1.000 0.200 

1400391000 14 Walnut 0.050000 1.000 0.100 

1500120000 15 Corn, field, flour 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500120001 15 Corn, field, flour-babyfood 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500121000 15 Corn, field, meal 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500121001 15 Corn, field, meal-babyfood 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500122000 15 Corn, field, bran 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500123000 15 Corn, field, starch 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500123001 15 Corn, field, starch-babyfood 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500124000 15 Corn, field, syrup 0.050000 1.500 0.050 avg re

 Full comment: avg res 47542612

1500124001 15 Corn, field, syrup-babyfood 0.050000 1.500 0.050 avg re

 Full comment: avg res 47542612

1500125000 15 Corn, field, oil 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500125001 15 Corn, field, oil-babyfood 0.050000 1.000 0.050 avg re

 Full comment: avg res 47542612

1500127000 15 Corn, sweet 0.110000 1.000 1.000 mean r

 Full comment: mean res D372625

1500127001 15 Corn, sweet-babyfood 0.110000 1.000 1.000 mean r

 Full comment: mean res D372625

1500323000 15 Rice, white 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500323001 15 Rice, white-babyfood 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500324000 15 Rice, brown 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500324001 15 Rice, brown-babyfood 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500325000 15 Rice, flour 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500325001 15 Rice, flour-babyfood 0.200000 1.300 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500326000 15 Rice, bran 0.200000 0.900 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500326001 15 Rice, bran-babyfood 0.200000 0.900 0.010 avg re

 Full comment: avg res from fld trl and proc fact (D27110)

1500381000 15 Triticale, flour 0.200000 1.000 1.000 

1500381001 15 Triticale, flour-babyfood 0.200000 1.000 1.000 

2001319000 20A Rapeseed, oil 0.200000 1.000 0.250 

2001319001 20A Rapeseed, oil-babyfood 0.200000 1.000 0.250 

2003128000 20C Cottonseed, oil 1.120000 0.010 0.050 avg re

 Full comment: avg res from fld trl & proc fact (D271110)

2003128001 20C Cottonseed, oil-babyfood 1.120000 0.010 0.050 avg re

 Full comment: avg res from fld trl & proc fact (D271110)

3100044000 31 Beef, meat 0.005900 1.000 1.000 AR RBD
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 20 of 27

 Full comment: AR RBD Jun 2008

3100044001 31 Beef, meat-babyfood 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100045000 31 Beef, meat, dried 0.005900 1.920 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100046000 31 Beef, meat byproducts 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100046001 31 Beef, meat byproducts-babyfood 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100047000 31 Beef, fat 0.065000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100047001 31 Beef, fat-babyfood 0.065000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100048000 31 Beef, kidney 0.300000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100049000 31 Beef, liver 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3100049001 31 Beef, liver-babyfood 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3200169000 32 Goat, meat 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3200170000 32 Goat, meat byproducts 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3200171000 32 Goat, fat 0.065000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3200172000 32 Goat, kidney 0.300000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3200173000 32 Goat, liver 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3300189000 33 Horse, meat 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400290000 34 Pork, meat 0.000590 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400290001 34 Pork, meat-babyfood 0.000590 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400291000 34 Pork, skin 0.096000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400292000 34 Pork, meat byproducts 0.096000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400292001 34 Pork, meat byproducts-babyfood 0.096000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400293000 34 Pork, fat 0.006500 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400293001 34 Pork, fat-babyfood 0.006500 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400294000 34 Pork, kidney 0.030000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3400295000 34 Pork, liver 0.096000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500339000 35 Sheep, meat 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500339001 35 Sheep, meat-babyfood 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500340000 35 Sheep, meat byproducts 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500341000 35 Sheep, fat 0.065000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500341001 35 Sheep, fat-babyfood 0.065000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500342000 35 Sheep, kidney 0.300000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3500343000 35 Sheep, liver 0.960000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600222000 36 Milk, fat 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600222001 36 Milk, fat-baby food/infant formu 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600223000 36 Milk, nonfat solids 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600223001 36 Milk, nonfat solids-baby food/in 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 21 of 27

3600224000 36 Milk, water 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600224001 36 Milk, water-babyfood/infant form 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3600225001 36 Milk, sugar (lactose)-baby food/ 0.006800 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3800221000 38 Meat, game 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

3900312000 39 Rabbit, meat 0.005900 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000093000 40 Chicken, meat 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000093001 40 Chicken, meat-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000094000 40 Chicken, liver 0.014000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000095000 40 Chicken, meat byproducts 0.046000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000095001 40 Chicken, meat byproducts-babyfoo 0.046000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000096000 40 Chicken, fat 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000096001 40 Chicken, fat-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000097000 40 Chicken, skin 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

4000097001 40 Chicken, skin-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

5000382000 50 Turkey, meat 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000382001 50 Turkey, meat-babyfood 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000383000 50 Turkey, liver 0.014000 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000383001 50 Turkey, liver-babyfood 0.014000 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000384000 50 Turkey, meat byproducts 0.046000 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000384001 50 Turkey, meat byproducts-babyfood 0.046000 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000385000 50 Turkey, fat 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000385001 50 Turkey, fat-babyfood 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000386000 50 Turkey, skin 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

5000386001 50 Turkey, skin-babyfood 0.007100 1.000 1.000 AR RDB

 Full comment: AR RDB June 2008

6000301000 60 Poultry, other, meat 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

6000302000 60 Poultry, other, liver 0.014000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

6000303000 60 Poultry, other, meat byproducts 0.046000 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

6000304000 60 Poultry, other, fat 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

6000305000 60 Poultry, other, skin 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000145000 70 Egg, whole 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000145001 70 Egg, whole-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000146000 70 Egg, white 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000146001 70 Egg, white (solids)-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000147000 70 Egg, yolk 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

7000147001 70 Egg, yolk-babyfood 0.007100 1.000 1.000 AR RBD

 Full comment: AR RBD Jun 2008

8601000000 86A Water, direct, all sources 0.095000 1.000 1.000 EFED E
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 22 of 27

 Full comment: EFED EDWC 

8602000000 86B Water, indirect, all sources 0.095000 1.000 1.000 EFED E

 Full comment: EFED EDWC 

9500023000 O Banana 0.080000 1.000 1.000 avg fi

 Full comment: avg field trial residue (D172878)

9500023001 O Banana-babyfood 0.080000 1.000 1.000 avg fi

 Full comment: avg field trial residue (D172878)

9500024000 O Banana, dried 0.080000 3.900 1.000 avg fi

 Full comment: avg field trial residue (D172878)

9500024001 O Banana, dried-babyfood 0.080000 3.900 1.000 avg fi

 Full comment: avg field trial residue (D172878)

9500177000 O Grape, leaves 0.025000 1.000 0.150 

9500178000 O Grape, raisin 0.025000 1.000 0.150 proces

 Full comment: processing factor reduced to 1 (PP#8F3607)

9500235000 O Olive 0.075000 1.000 1.000 

9500236000 O Olive, oil 0.075000 0.600 1.000 

9500283000 O Plantain 0.080000 1.000 1.000 

9500284000 O Plantain, dried 0.080000 3.900 1.000 
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 23 of 27

Attachment 4: Chronic Results File at an EDWC of 95 ppb.

 Ver. 3.10

DEEM-FCID Chronic analysis for GLUFOSINATE AMMONIUM NHANES 2003-2008 2-day

Residue file name: C:\Documents and Settings\wdonovan\My 

Documents\CalendexWWEIAFCID\128850c.R08

 Adjustment factor #2 used.

Analysis Date 06-19-2012/09:32:00 Residue file dated: 06-19-2012/08:05:17

Reference dose (RfD, Chronic) = .006 mg/kg bw/day

COMMENT 1: 95 ppb EDWC, 2012 SLUA

===============================================================================

 Total exposure by population subgroup

-------------------------------------------------------------------------------

 Total Exposure

 -----------------------------------

 Population mg/kg Percent of 

 Subgroup body wt/day Rfd 

-------------------------------------- ------------- ----------------

Total US Population 0.002324 38.7%

Hispanic 0.002343 39.0%

Non-Hisp-White 0.002353 39.2%

Non-Hisp-Black 0.001998 33.3%

Non-Hisp-Other 0.002668 44.5%

Nursing Infants 0.002273 37.9%

Non-Nursing Infants 0.007501 125.0%

Female 13+ PREG 0.002198 36.6%

Children 1-6 0.003708 61.8%

Children 7-12 0.002130 35.5%

Male 13-19 0.001645 27.4%

Female 13-19/NP 0.001767 29.4%

Male 20+ 0.002084 34.7%

Female 20+/NP 0.002310 38.5%

Seniors 55+ 0.002166 36.1%

All Infants 0.005887 98.1%

Female 13-50 0.002198 36.6%

Children 1-2 0.004387 73.1%

Children 3-5 0.003447 57.4%

Children 6-12 0.002261 37.7%

Youth 13-19 0.001706 28.4%

Adults 20-49 0.002203 36.7%

Adults 50-99 0.002202 36.7%

Female 13-49 0.002195 36.6%

-------------------------------------------------------------------------------
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 24 of 27

Attachment 5. Dietary Burden and Livestock AR Calculations for Glufosinate Ammonium.

Table 6: Livestock Anticipated Dietary Burden Calculation for Glufosinate Ammonium (Chronic Scenario) 

commodity

Average 

residue

(ppm)

% dry

matter

% diet dietary burden (ppm)

Beef cattle Dairy cattle Poultry Swine Beef cattle Dairy cattle Poultry Swine

aspirated grain fractions CC 9.2a85 5 -- -- -- 0.54 -- -- --

field corn grain CC 0.05b88 45 15 55 65 0.026 0.0085 0.028 0.033

field corn forage R 1.8c40 10 45 -- -- 0.45 2.03 -- --

soybean hulls R 2.0c90 -- -- -- -- -- -- -- --

soybean meal PC 0.77c92 -- -- 5 -- -- -- 0.039 --

soybean seed PC 0.77b89 5 -- 20 15 0.043 -- 0.154 0.12

sugar beet molasses CC 1.6d75 10 10 -- -- 0.21 0.21 -- --

undelinted cottonseed PC 1.1e88 -- 10 -- -- -- 0.125 -- --

cotton gin byproducts R 3.8e90 5 -- -- -- 0.21 -- -- --

rice grain CC 0.2e88 20 20 20 20 0.045 0.045 0.04 0.04

dietary burden 1.52 2.42 0.26 0.19

a

 D227386, M.I. Rodriguez, 26-AUG-1996. Max CF = 12x. AR = CF X Avg soybean residue = 12 X 0.77 = 9.24 ppm.

b

 D211531, M.I. Rodriguez, 07-MAR-1996.

c

 D219069 & D211531, M.I. Rodriguez, 07-MAR-1996. Range of F. corn forage residues: 0.15 – 3.6 ppm. Avg = 1⁄2 X 3.6 = 1.8. ppm. Soybean hulls: 2.66 

(CF) X 0.77 = 2.0 ppm; soybean meal: 1.0 (CF) X 0.77 = 0.77 ppm.

d

 D257682, T. Bloem, 09-JUL-1999. Molasses CF = 6.8X. 6.8 x 0.24 ppm (Avg sugar beet residue) = 1.6 ppm.

e

 D271110, T. Bloem, 20-JUN-2002 [45089303.der.wpd] cottonseed avg = 1.12 ppm; cotton gin byproduct avg = 3.76 ppm. [45204406.der.wpd] rice grain avg 

= 0.20 ppm.
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 25 of 27

Table 7: Results of a Ruminant Feeding Study; Livestock Fed a Diet Spiked with Glufosinate Ammonium:HOE 061517 (15:85)

MRID 43766921 (D211531, M. Rodriguez, 7-Mar-1996)

commodity

maximum combined 039866, 099730, and 061517 

residue at the three dosing levels (ppm) combined 039866, 099730, and 061517 residue used in the chronic

9.1 ppm dietary exposure assessment

beef – 5.9x

dairy – 3.8x

27.3 ppm 

beef --18x

dairy – 11x

91.1 ppm 

beef – 59x

dairy – 38x

milk <0.04 <0.048 0.259 Residue = 0.259/38 = 0.0068 ppm cow

kidney <0.20 <0.20 0.28 residues in this study were generally <LOQ while residues in the 3:1 

glufosinate ammonium:061517 feeding study (see below) were generally 

>LOQ; therefore, the 3:1 feeding study was used for calculation of residues 

in kidney, liver, meat, and fat (see below) 

fat <0.10 <0.10 <0.10

liver <0.20 <0.20 0.39

muscle <0.10 <0.10 <0.10

Table 8: Results of a Ruminant Feeding Study; Livestock Fed a Diet Spiked with Glufosinate Ammonium:HOE 061517 (3:1)

PP#8F3607, J. Garbus, 8-Aug-1990

commodity

maximum combined 039866, 099730, and 061517 

residue at the three dosing levels (ppm)

combined 039866, 099730, and 061517 residue used in the chronic dietary 

exposure assessment

4 ppm 

beef – 2.6x

dairy – 1.7x

12 ppm

beef -7.8x

dairy – 5.0x

40 ppm

beef – 26x

dairy – 17x

milk <0.07 <0.07 <0.07 residues in this study were <LOQ while residues in the 15:85 glufosinate 

ammonium:061517 feeding study (see above) were >LOQ; therefore, the 15:85 

feeding study was used for calculation of residues in milk (see above) 

kidney <0.51 <2.1 7.5 Residue = 0.51/1.7 = 0.30 ppm cow; 0.03 ppm swine

muscle <0.10 <0.10 <0.10 Residue = 0.10/17 = 0.0059 ppm cow; 0.00059 ppm swine

fat <0.11 <0.13 <0.21 Residue = 0.11/1.7 = 0.065 ppm cow; 0.0065 ppm swine

liver 1.63 <4.3 <10.8 Residue = 1.63/1.7 = 0.96 ppm cow; 0.096 ppm swine

1

 Residue in cattle  10x to calculate residue in swine (swine diet approx. 10x less than that of cattle)
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 26 of 27

Table 9. Results of Glufosinate Ammonium Feeding Studies in Hens.

matrix

ppm (glufosinate free acid equivalents) in Laying Hens dosed with 15:85 glufosinate ammonium:N-acetyl-glufosinate

HOE 039866/

HOE 0997302

+

HOE 061517

HOE 039866/

HOE 0997302

+

HOE 061517

HOE 039866/

HOE 0997302

+

HOE 061517

Chronic anticipated residue at 1x RDB1

0.36 ppm [1.4x 

MTDB]

1.08 ppm [4.2x 

MTDB]

3.6 ppm [14x MTDB]

liver <0.20 <0.20 <0.20 <0.014

skin <0.10 <0.10 <0.10 <0.0071

muscle <0.10 <0.10 <0.10 <0.0071

fat <0.10 <0.10 <0.10 <0.0071

egg <0.10 <0.10 <0.10 <0.0071

3:1 glufosinate ammonium:HOE 061517

4.5 ppm [17x 

MTDB]

13.5 ppm [52x 

MTDB]

45 ppm [170x MTDB]

liver <0.20 <0.20 <0.20 See above

kidney <0.74 2.07 7.85 0.046

muscle <0.10 <0.10 <0.10 See above

fat <0.10 <0.10 <0.10 See above

egg <0.10 <0.10 <0.12 See above

1

If residues were <LOQ at all three dosing levels then an anticipated residue (AR) was calculated using the results from the highest dose level. If 

residues were >LOQ at all three dosing levels, then the AR was calculated using the results from the dosing level closest to the RDB.

2 HOE 099730 was not reported in the 3:1 glufosinate ammonium:HOE 061517 feeding study, analytical method would not have distinguished between 

HOE 039866 and HOE 099730 or the D and L enantiomers of these compounds
Glufosinate Ammonium Dietary Exposure Assessment DP#: 402741 PC Code: 128850

Page 27 of 27

Attachment 6. Glufosinate Ammonium SLUA dated 19-MAR-2012

March 19, 2012

Screening Level Estimates of Agricultural Uses of Glufosinate (128850)

Sorted Alphabetically

Percent Crop Ttd.

Crop Lbs. A.I. Avg. PCT Max. PCT

1 Almonds 200,000 15 40

2 Apples 4,000 <1 <2.5

3 Blueberries 10,000 5 15

4 Canola 100,000 25 35

5 Cherries+ 1,000 <1 <2.5

6 Corn 1,300,000 5 10

7 Cotton 200,000 5 10

8 Fallow <500 <1 <2.5

9 Figs ** <500 NC NC

10 Grapes 200,000 15 30

11 Hazelnuts 6,000 10 25

12 Peaches+ 2,000 <2.5 10

13 Peanuts+ 1,000 <1 <2.5

14 Pecans 1,000 <1 <2.5

15 Pistachios 50,000 20 45

16 Plums/Prunes+ 2,000 <2.5 10

17 Pomegranates ** <500 NC NC

18 Potatoes 30,000 10 20

19 Rice 5,000 <1 <2.5

20 Soybeans 100,000 <1 <2.5

21 Sweet Corn <500 <1 <2.5

22 Walnuts 30,000 10 20

All numbers rounded.

<500: indicates less than 500 pounds of active ingredient.

<2.5: indicates less than 2.5 percent of crop is treated.

<1: indicates less than 1 percent of crop is treated.

**: California data only. No information available about use of this chemical on this crop in other states. 

 NC: Not calculated

+ Crops not known to be listed on active end use product registrations or as Section 18 emergency

exemptions when this report was run

SLUA data sources include: 

USDA-NASS (United States Department of Agriculture's National Agricultural Statistics Service) 

Private Pesticide Market Research

California DPR (Department of Pesticide Regulation)

These results reflect amalgamated data developed by the Agency and are releasable to the public.