### 1 **UNITED ST AT**  **ES ENVIRONMENT AL**  **PROTECTION A GENCY** 

**WA SHINGTON, D.C. 20460** 
**OFFICE OF CHEMICAL SAFETY**  **AND POLLUTION PREVENTION**  

### MEMORANDUM **DATE :**  April 26, 2010 **SUBJECT:** Tier I Estimated Drinking Water Concentrations of Fenprop athrin : IR
- 4 Petition

for the Use of Fenpropathrin on Additional Tropical and Sub Tropical Fruits and for Tolerance for Tea ( **PC Code 127901**  , **DP Barcode D368174** ). **FROM:** José L
. Meléndez, Chemist

Environmental Risk Branch V Environmental Fate and Ef fects Division (7507P) **T HROUGH**  **:** Mah T. Shamim, Ph.D., Chief

Environmental Risk Branch V Environmental Fate and Effects Division (7507 P ) **TO:** Laura Nollen, Risk Manager Reviewer

Barbara Madden, Review Manager #05 Daniel Rosenblatt , Branch Ch ief Risk Integration, Minor Use and Emergency Response Branch Registration Division (7505P) **AND** Doug las Dotson, Ph.D., Chemist

Christina S w artz , Branch Chief Registration Action Branch II Health Effects Division (7509P) This memo p resents the Tier I Estimated Drinking Water Concentrations (EDWCs) for fenpropathrin, calculated using FIRST (surface water) and SCI
- GROW (ground water) for use in the human health risk assessment. The registrant seeks to establish tolerances for use on a dditional (other than previously petitioned) tropical and sub tropical fruits , and tolerance onl y for tea . The EFED has found that the scenario with the highest rate and minimum interval between applications is grapes (two applications at 0.4 lb a.i./A, at 7 day interval) . This scenario was assessed in the previous drinking waters assessment (D295472 , refer to **Appendix A**  ) and the Division is relying on it to cover the new uses.

### 2

For surface water, the acute (peak) value is 10.3 ppb and the chronic ( annual average ) value is 1.8 1 ppb
. The groundwater screening concentration is 0.0048 0 ppb . These values generall y represent upper - bound estimates of the concentrations that might be found in surface water and groundwater due to the use of fenpropathrin on grap es . Both models provide estimates suitable for screening purposes. Additional refinements can be developed should they be needed b y HED. Should any

questions arise, please, contact José L . Meléndez at melende z.jose@epa.gov
. **Use Information:** Fenpropathrin is currently used on a variety of crops, including cotton, head and stem brassica, bushberries and currant, citrus, cucurbits, fruiting vegetables, grapes, peanuts, pome fruits, strawberries, peas, tree nuts and pistachio, barley , various tropical and sub tropical fruits (inedible peel, such as avocado, mango and papaya), bushberries, fruiting vegetables, peas, caneberries crop and olives. The registrant seeks to establish tolerances for use on various new tropical and subtropical fruits (such as, but not limited to guava, acerola, passion fruit, starfruit, Spanish lime and cherimoy a) ( and tolerance onl y for tea) . The proposed application rate for the new tropical and subtropical fruits is the same than for alread y registered tropical fruits (two applications at 0.4 lb a.i./A, at 14 day interval) . Fenpropathrin may be applied by

ground, airblast or aerial methods, but it may applied to tropical and subtropical f ruits only via ground methods. **Table 1 -**  **1** provid es a summary table of all use patterns, with the new uses shaded blue , and the Tier I modeled use shaded gray . **Data gaps:** The database for fenpropathrin is considered adequate for drinking waters assessment . The mobility (batch equilibrium) study was found to be supplemental because Freundlich KF 

### ’s and KFOC 

### ’s could only

be determined for the loam. Kd 

### ’s and KOC 

### ’s could not be determined for the silt loam sediment, and sandy loam, silt loam, sandy

loam and clay

loam soils at all concentrations. The possib le need for additional data is being evaluated during the registration review process
.

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**Table 1**  **- 1**  **. Summary use information for fenpropathrin**  **, based on DANITOL® 2.4 EC Spray (Reg. No.**  **59639 -**  **35) current and proposed**  **label s**  **. The new uses are shaded**  **blue .**  **The use pattern selected for modeling is bolded**  **and shaded gray**  **.**

**USE SINGLE**  **APP. RATE**  **(lbs. a.i./A) NUMBER** 

**OF APPS. SEASONAL** 

**APP. RATE**  **(lbs. a.i./A) INTERVAL** 

**BETWEEN APP**  **S . (days)**  **APP.**

**METHOD PRE**  ****

**HARVEST INTERVAL**  **(days)** Tropical and subtrop ical fruits ( guava, acerola, feijoa, jaboticaba, passion fruit, starfruit, wax jambu, lychee, longan, Spanish lime, pulasan, rambutan, sugar apple, atemoya, biriba, cherimoya, custard apple, ilama, soursop) 0.3
- 0.4 2 0.8 14 G 1

Tropical and subtropical f ruits (inedible peel, including but not limited to avocado, canistel, mango, papaya, sapodilla, black and mamey sapote, star apple) 0.3
- 0.4 2 0.8 14 G 1

Head and stem brassica (broccoli, brussel sprouts, cabbage, cauliflower, cavalo broccolo, Chinese broc coli
- gal lon, Chinese cabbage
- napa, Chinese mustard cabbage
- gal choy, Kohlrabi, Brussels sprouts, cauliflower) 0.2
- 0.3 3
- 4 0.8 7 G , A 7

Citrus 0.2
- 0.4 2
- 4 0.8 10 G, Airblast, A 1 Cotton 0.15
- 0.3 3
- 5 0.8 7 G, A 21 Cucurbits (balsam apple, balsam pear, bi tter melon, chayote, Chinese cucumber, Chinese waxgourd, citron melon, cucumber, edible gourd, gherkin, honeydew, Momordica spp. , muskmelon, pumpkin, summer squash, watermelon, winter squash) 0.2
- 0.3 3
- 4 0.8 7 G, A 7

Fruiting vegetables (bell pepper, chil i pepper, cooking pepper, eggplant, ground cherry
-Physalis spp. , pepino, pimento, sweet pepper, tomatillo, tomato) 0.15
- 0.2 4
- 5 0.8 7 G, A 3
**Grape 0.1**  **- 0.4**  **2 -**  **8 0.8**  **7 G, A**  **21** Peanut 0.1
- 0.3 3
- 8 0.8 7 G, A 14 Pome fruit (apple, crabapple, loquat, mayhaw, quince, oriental pear, pear) 0.2
- 0.4 2
- 8 0.8 10 Airblast 14 Strawberry 0.2
- 0.4 2
- 8 0.8 30 G 2 Pea (English pea, garden pea, green pea, pigeon pea) 0.2 4 0.8 7 G, A 7 Currant 0.2
- 0.3 3 0.8 7 G 21

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**Table 1**  **- 1**  **. Summary use information for fenpropathrin**  **, based on DANITOL® 2.4 EC Spray (Reg. No.**  **59639 -**  **35) current and proposed**  **label s**  **. The new uses are shaded**  **blue .**  **The use pattern selected for modeling is bolded**  **and shaded gray**  **.**

**USE SINGLE**  **APP. RATE**  **(lbs. a.i./A) NUMBER** 

**OF APPS. SEASONAL** 

**APP. RATE**  **(lbs. a.i./A) INTERVAL** 

**BETWEEN APP**  **S . (days)**  **APP.**

**METHOD PRE**  ****

**HARVEST INTERVAL**  **(days)** Bushberries (blueberry
- highbush and lowbush, elderberry, g ooseberry, huckleberry, juneberry, lingonberry, rabbiteye, salal) 0.2
- 0.3 2 0.6 14 G, A 3

Caneberries (blackberry
- including bingleberry, boysenberry, dewberry, lowberry, marionberry, olallieberry and youngberry; loganberry; black raspberry; red raspberry) 0.2
- 0.3 2 0.6 14 G, A 3

Olive 0.2
- 0.3 3
- 4 0.8 14 G 7 Stone fruits (such as apricot, cherry, nectarine, peach, plum and prune) 0.2
- 0.4 2
- 4 0.8 10 Airblast 14 Tree nut (such as almond, beechnut, cashew, chestnut, chinquapin, filbert (hazelnut), hickory, macadamia, pecan, pistachio, walnut) 0.2
- 0.4 2
- 4 0.8 10 Airblast 14
Barley 0.2 1 0.2 N/A G 14

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**APPENDIX A . Copy of Drinking Water Assessment Dated January 22, 2003**  

# C O P Y
**UNITED STA**

**TES ENVIRONMENTA L PROTECTION A**  **GENCY** WA SHINGTON D.C., 20460
OFFICE OF PREVENTION, PESTICIDES AND TOXIC SUBSTANCE S



### January 22, 2003 **MEMORANDUM SUBJECT:**  IR
- 4 Tolerance Petition for the Use of Fenpropathrin (PC # 127901) on Bushberry

Crop Subgroup 13
- B (DP Bar Code: D295472). Tier I Estimated Drinking Water Concentrations of Fenpropathrin. **TO:** Shaja Brothers, PM Team Reviewer

Robert Forrest, Chief Registration Division (7505C) **and** Gary

Bangs Health Effects Division (7509C) **FROM** : José Luis Meléndez, Chemist

Environmental Risk Branch V/EFED **THROUGH:** Mah T. Shamim, Ph.D., Chief

Environmental Risk Branch V Environmental Fate and Effects Division (7507C) This memo presents the Tier I Estimated Drinking Water Concentrations (EDWCs) for fenpropathrin, calculated using FIRST (surface water) and SCI GROW (ground water) for use in the human health risk assessment. The r egistrant seeks to establish tolerances for use on bushberry crop (subgroup 13
- B). For surface water, the acute (peak) value is **10.3 ppb** and the annual average value is **1.8 ppb**
. The groundwater screening concentration is **<0.006 ppb** . These values general ly represent upper - bound estimates of the concentrations that might be found in surface water and groundwater due to the use of fenpropathrin on grapes, which represents the scenario with the highest application rate with the lowest interval between applic ations. Both models provide estimates suitable for screening purposes. Additional refinements can be developed should they be needed b y HED.

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**Use of Fenpropathrin on Bushberry Crops (Subgroup 13 -**  **B):** The proposed petition for tolerance for the use of fe npropathrin is for use in the production of bushberry (subgroup 13B). The product used is Danitol 2.4 EC Spray (30.9% a.i.). It would be used on Blueberries (highbush and lowbush), Elderberries, Gooseberries, Huckleberries, Lingonberries, Juneberries, an d Salal, for the control of Japanese Beetle, Blueberry Maggot, and Obliquebanded Leafroller. Two applications can be made with 14 day interval at a maximum of 0.3 lb a.i./A/application, and not to exceed a seasonal application rate of 0.6 lb a.i./A. Acco rding to the submission (section B), the chemical can be applied by ground methods only
. **Background Information on FIRST:** FIRST is a screening model designed to estimate the pesticide concentrations found in water for use in drinking water assessments. Itprovides high
- end values on the concentrations that might be found in a small drinking water reservoir due to the use of pesticide. Like GENEEC, the model previously

used for Tier I screening level, FIRST is a single
- event model (one run
- off event). I t can also account for spray drift from multiple applications. FIRST takes into consideration the so called Index Drinking Water Reservoir by representing a larger field and pond than the standard GENEEC scenario. The FIRST scenario includes a 427 acres field immediately

adjacent to a 13 acres reservoir, 9 feet deep, with continuous flow (two turnovers per year). The pond receives a spray drift event from each application plus one runoff event. The runoff event moves a maximum of 8% of the applied pesti cide into the pond. This amount can be reduced due to degradation on field and the effect of binding to soil. Spray drift is equal to 6.4% of the applied concentration from the ground spray application and 16% for aerial applications. FIRST also makes a djustments for the percent crop area. While FIRST assumes that the entire watershed would not be treated, the use of a PCA is still a screen because it represents the highest percentage of crop cover of an y large watershed in the US, and it assumes that th e entire crop is being treated. Various other conservative assumptions of FIRST include the use of a small drinking water reservoir surrounded b y a runoff
- prone watershed, the use of the maximum use rate, no buffer zone, and a single large rainfall. **Back ground Information on SCIGROW:**  SCI GROW V.2.3 provides a groundwater screening exposure value to be used in determining the potential risk to human health from drinking water contaminated with the pesticide. Since the SCI GROW concentrations are likely to be approached in onl y a very small percentage of drinking water sources, i.e., highl y vulnerable aquifers, it is not appropriate to use SCI GROW for national or regional exposure estimates. SCI GROW estimates likely groundwater concentrations if the pestic ide is used at the maximum allowable rate in areas where groundwater is exceptionally vulnerable to contamination. In most cases, a large majority

of the use area will have groundwater that is less vulnerable to contamination than the areas used to derive the SCIGROW estimate.

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



### 7 Estimated concentrations of chemicals with Koc values greater than 9995 ml/g are beyond the scope of the regression data used in SCI
- GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure ass essment should be considered, regardless of the concentration returned by SCI
- GROW. **Modeling Inputs and Results:** Tables 1 and 2 summarize the input values used in the model runs for FIRST 1.0 and SCI GROW, respectively . The lowest non
- sand KD 

### was used i n FIRST. The median KOC 

### value was used in SCI GROW. There was one available aerobic soil metabolism half
- life for fenpropathrin. Three times the available half
- life was used for the aerobic soil metabolism input in FIRST. The modeling results associated with maximum allowable rate per y ear (on peanuts, 0.27 lb ai/A applied three times at 7 day s intervals), are presented in Table 3. Attached to this memo are copies of the original printouts generated from FIRST and SCIGROW runs. According to the label, there is a buffer zone of 25 feet between the treated fields and streams, ponds, lakes, rivers, springs, swamps, marshes, or irrigation canals containing water ye ar around for ground applications, and 150 feet for aerial applications. I f ultra low volume (ULV) application is made, the buffer zone should be increased to 450 feet
. Table 1. Environmental Fate and Other Input Parameters for the Estimation of

Fenpropathrin using FIRST **Param eter**  **Value Source**  Water Solubility (25  C) 0.0103 ppm MRID# 44370 001 Hy droly sis Half

- Life (pH 7) (stable) 0 MRID# 42599901 Aerobic Soil Metabolism Half
- Life (3X available value) 456 days MRID# 42525902 Aerobic Aquatic Metabolism Half
- life (2X aerobic soil input) 912 days NA Aqueous Photolysis Half
- Life (st able) 0 MRID# 42546402 Coefficient (Lowest non
- sand K d ) 212 MRID#.s 42584101 and 44370002 Pesticide is Wetted
- In No Label Method of Application aerial Label PCA 0.87 Default for grapes Depth of Incorporation (Broadcast) 0.0 in. Label

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



### 8 Table 2. Environmental Fate Input Parameters for the Estimation of Fenpropathrin using

SCI GROW. **Param eter**  **Value Source**  Organic Carbon Partition Coefficient (median K OC ) 293000 MRID#’s 42584101 and 44370002 Aerobic Soil Metabolism Half
- Life (available value) 152 days MRID# 42525902 

### Table 3. Modeling Results for Use of Fenpropathrin on Grapes **Param eter**  **Grapes Source**  Application Method aerial Label Application Rate 0.4 lb a.i./A Label Applications Permitted per Year 2 Label Application Interval 7 days N/A FIRST 1.0 Peak Untreated Water Concentration **10.3 ppb** N/A FIRST 1.0 Annual Average Untreated Water Concentration **1.8 ppb** N/A SCIGROW Ground Water Concentration **<0.006 ppb** N/A

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## Appendix I. **SURFACE WATERS (FIRST) and GROUND WATERS OUTPUT** 

**RUNS FOR GRAPES**  **Estimated Surface Water Concentrations for Fenpropathrin** RUN No. 1 FOR Fenpropathrin ON Grapes * INPUT VALUES *

-------------------------------------------------------------------- RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP ONE(MULT) INTERVAL Kd (PPB ) (%DRIFT) AREA (IN)

-------------------------------------------------------------------- .400( .796) 2 7 212.0 10.3 AERIAL(16.0) 87.0 .0 FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

-------------------------------------------------------------------- METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED (FIELD) RAIN/RUNOFF (RESERVOI R) (RES. - EFF) (RESER.) (RESER.)

-------------------------------------------------------------------- 456.00 2 N/A .00
- .00 912.00 912.00 UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.0 AUG 1, 2001

-------------------------------------------------------------------- PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC) CONCENTRATION CONCENTRATION

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

10.300 1.811
**Estimated Ground Water Concentrations for Fenpropathrin**

SCIGROW VERSION 2.3 ENVIRONMENTAL FATE AND EFFECTS DIVISION OFFICE OF PESTICIDE PROGRAMS U.S. ENVIRONMENTAL PROTECTION AGENCY

SCREENING MODEL FOR AQUATIC PESTICIDE EXPOSURE SciGrow version 2.3 chemical:Fenpropathrin time is 1/20/2004 10:21:32

---- -------------------------------------------------------------------- Application Number of Total Use Koc Soil Aerobic rate (lb/acre) applications (lb/acre/yr) (ml/g) metabolism (days)

------------------------------------------ ------------------------------ 0.400 2.0 0.800 2.93E+05 152.0

------------------------------------------------------------------------ groundwater screening cond (ppb) = 4.80E - 03* *Estimated concentrations of chemic als with Koc values greater than 9995 ml/g are beyond the scope of the regression data used in SCI - GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure

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assessment should be considered, regardless of the concentr ation returned by SCI - GROW. ************************************************************************