### 1

**UNITED STA**

**TES ENVIRONMENTA L PROTECTION A** **GENCY**

WASHINGTON, D. C. 20460

OFFICE OF PREVENTION, PESTICIDES AND TOXIC SUBSTANCES 

### January 4, 2005 **PC Code 124871 DP Barcode: D311291**  **MEMORANDUM SUBJECT:**  Estimated Drinking Water Concentrations of combined residue of spirodiclofen

and it’s degradates (spirodiclofen

- enol, spirodiclofen

-ketohydroxy and spirodiclofen

- dihydroxy)in surface water and groundwater **To:** Daniel Kenny, Risk Manager

Rita Kumer, Chemical Review Manager Reregistration Division (7505C) Mary Clock

-Rust, Biologist Tom Bloem, Chemist Health Effects Division (7509C) **From:** Faruque Khan, Ph.D, Environmental Scientist

Larry Liu, Ph.D, Environmental Scientist Environmental Risk Branch V Environmental Fate and Effects Division (7507C) **Through:** Mah Shamim, Ph.D., Chief

Environmental Risk Branch V Environmental Fate and Effects Division (7507C) This memorandum presents a drinking water assessment to support spirodiclofen (Envidor ® 

### 2 SC) miticide use on citrus, pome fruits, stone fruits, tree nuts crops, and grapes. The models, Pesticide Root Zone Model, Exposure Analysis Modeling System (PRZM/EXAMS) and Screening Concentrations In Ground Water Model (SCIGROW) were used in estimating the total residue concentrations of spirodiclofen in surface water and groundwater respectively. The Estimated Drinking Water Concentrations (EDWCs) of spirodiclofen and its three metabolites (spirodiclofen

- enol, spirodiclofen

-ketohydroxy and spirodiclofen- dihydroxy ) were computed using a pplication rates of 0.53 to 0.28 lbs. a.i./Acre on multiple crops. Tier II surface water modeling of F lorida citrus scenario using the index reservoir with the default percent cropped area (PCA=0.87) predicts the 1 in 10 ye ar peak (acute) concentration of spirodiclofen residues is not likely to exceed 23.86 μg/L. The 1 in 10 year annual average concentration (non

- cancer

###   2   27

chronic) and 30 ye ar annual average concentration (cancer) of spirodiclofen residues is not likely to exceed 4.99 and 1.67 μg/L, respectively

. Tier I S CIGROW model was used in generating groundwater EDWCs for the highest application rate of 0.53 lbs. a.i./A and the resulted concentration is 0.43 μg/L for spirodiclofen residue, which is recommended to use f or both acute and chronic exposures. The EDWCs for surface and ground water resources are presented in Table 1. An electronic PRZM/EXAMS time

- series output file of PCA adjusted daily EDWCs for surface water for Florida citrus scenario was also provided to Tom Bloem, Health Effects Division (HED). **Table 1. Estimated Drinking Water Concentrations (EDWC’s) of total res idue of**  **Spirodiclofen and it’s three degradates (Spirodiclofen** 
**- enol, Spirodiclofen** 
**- Ketohydroxy**  **and Spirodiclofen**
**- dihydroxy) in surface water a** **nd groundwater Chemical**  **Surface Water (μg/L) Groundwater**  **(μg/L) Peak**  **Acute Non** **- cancer** 

**chronic C**  **ancer chronic Total residue**  **s** (Spirodiclofen, Spirodiclofen

enol, Spirodiclofen

Ketohydroxy and 23.86 4.99 1.67 0.44*

* Recommended EDWCs values for acute and chronic for groundwater
**1.0 ESTIMA** **TION OF**  **SURFA CE**  **WA TER**  **AN D**  **GROUNDWA TER**  **EXPOSURE CONCENTRA** **TIONS** A cumulative residue modeling approach was used to account for the environmental fate and transport of spirodiclofen and its degradation products (spirodiclofen

- enol, spirodiclofen

ketohydroxy

and spirodiclofen

- dihydroxy)with toxicological concern. These residues were designated by

the HED’s Metabolite Assessment Review Committee (MARC) as being spirodiclofen residues of human

-health toxicological concern. Linear fitting techniques using the first order degradation model (y = -bx + a) was used in calculating the combined residue half

lives. The Envidor ® 

### 2 SC label app lication rates and the environmental fate parameters for spirodiclofen residue were used in estimating EDWCs using two screening models PRZM/EXAMS, shell PE4V01a (8/13/03) for surface water and SCIGROW v.2.3 (7/29/03) for groundwater. The outputs of the two screening models represent estimates of the concentrations that might be found in surface water and groundwater due to the use of spirodiclofen. Several scenarios (apple, citrus, peaches, grape, and pecan) were investigated and the Florida citrus provided the highest EDWCs among the modeled scenarios (Table 2).

###   3   27

**Table 2. Estimated Drinking Water Concentrations (EDWCs) of total residue concern of Spirodiclofen and it’s**  **three degradates (spirodiclofen**
**- enol, spirodiclofen**  **- ketohydroxy and spirodiclofen**  **- dihydroxy)**  **for multiple crop scenarios** Crops Scenarios (Application rate,

frequency) 1/10 Peak (Acute) μg/L ‡ 1/10 Yearly

Average (non
- Cancer Chronic) μg/L ‡ 30 years Average

(Cancer Chronic) μg/L ‡

Florida Citrus 0.31lbs ai/A , 1

application 23.86 4.99 1.67
GA Pecan 0.53lbs ai/A , 1

application 11.75 2.02 0.70 PA Apple 0.28lbs ai/A , 1

application 5.52 1.97 1.09
GA Peaches 0.28lbs ai/A , 1

application 3.92 1.41 0.64 CA Grape 0.53lbs ai/A , 1

application 2.50 1.44 0.97 OR Apple 0.28lbs ai/A , 1

application 1.01 0.59 0.43 ‡ = PRZMEXAM EDWCvalues for crops were corrected for PCA (default =0.87) 

### 2.0 Background Information on PRZM/EXA**MS** The linked PRZM and EXAMS model (PRZM/EXAMS) is ty pically used by the Environmental Fate and Effects Division (EFED) in estimating pesticides concentrations in surface waters. PRZM is employed to evaluate runoff loading to a receiving surface water body

. As soon as the pesticide residues reaches the surface water, EXAMS uses algorithms to the pesticides concentrations by

taken into account different dissipation mechanism in the aqueous and sediment phases. PRZM i s a one - dimensional finite

- difference modeling system that was originally developed to model nitrogen soil kinetic processes and groundwater environment. It was later enhanced to expand its capability

to predict pesticides transport and transformation down through the crop zone and saturated zone. The expanded capabilities cover additional phenomena such as soil temperature simulation, microbial transformation, vapor phase transport in soils, volatilization, irrigation simulation, and a method of characteri stics (MOC) algorithm to eliminate numerical dispersion. EXAMS is a model that has a set of process modules that link fundamental chemical properties to limnological processes that control the kinetics and transport of chemicals in aquatic systems. Itprovides facilities for steady state or long

-term evaluation of chronic chemical discharges, initial

-value approaches for studying short

-term contaminant releases, and full kinetic

###   4   27

simulations that allow for monthly variation in mean climatological factors, and changes in contaminant loadings on daily time scales. It is fairly

and relatively complex model that requires more input variables, ranging from hydro

- geological and weather data to pesticide physicochemical properties, mobility c oefficients, and degradation rate constants in the aqueous and sediment phases. **3.0 Background Information on SCI**
**- GROW**  SCIGROW is a regression

-based model that provides a groundwater screening exposure value to be used in determining the potential risk to human health from drinking water contaminated with the pesticide. SCIGROW estimates likely groundwater concentrations if the pesticide is used at the maximum allowable rate in areas where groundwater is exceptionally vulnerable to contamination. **4.0 Uncertainties, A ssumptions, and Limitations**  Uncertainties, assumptions, and limitations of the simulation modeling are as follows:

· A major uncertainty in the assessment is the lack of environmental fate data for the toxic transformation products of spirodiclofen. In order to address this uncertainty, EFED has conducted the Tier II modeling on the summed spirodiclofen residues instead of individual residues. This approach was taken because the environmental fate studies were deficient in addressing the identification and fate of spirodiclofen transformation products.

· The cumulative residue modeling method assumes environmental fate properties for spirodiclofen and its degradation products (spirodiclofen

- enol, spirodiclofen

-ketohydroxy and spirodiclofen

- dihydroxy) are similar. This modeling approach provides a conservative assessment process for consideration of simultaneous formation and decline of spirodiclofen residues. However, it is likely to provide conservative estimates because minor degradation products (<10% of applied) may dictate the environmental fate properties for all spirodiclofen residues

· The adsorption coefficient and solubility o f spirodiclofen

- enol was used because it has the lowest average Koc 

### and highest solubility

. These properties may provide conservative estimates because low Koc 

### and high solubility may dictate the runoff load for all spirodiclofen residues.

· PRZM

-EXAMS scenarios are regionally representative for each crop. They may not represent the most conservative runoff or spray drift situation for each and every crop. It is assumed focusing on several scenarios in higher runoff areas such as the eastern United States will capture upper end spirodiclofen residue concentrations in drinking water.

· Spirodiclofen is a new chemical. Monitoring data are not available to evaluate the prediction potential of PRZM/EXAMS and SCIGROW simulation modeling.

###   5   27

**5.0 Modeling Inputs and Results:** Tables 3 and 4 summarize the spirodiclofen input values used in the model runs for PRZM/ EXAMS and SCIGROW, respectively. PRZM /EXAMS and SCIGROW modeling results are presented in Table 1 and 2. This memo also contains the copies of the outputs generated from the PRZM/EXAMS and SCIGROW models (Appendix A). Appendix A

-2 has a truncated PRZM/EXAMS daily time

- series output file. Half

- life calculation methods for spirodiclofen total residue analysis can be found in Appendix B for various environmental fate studies.
**Table 3. PRZ M/EXAMS Input Param** **eter s for spirodiclofen and its degradates (spirodiclofen** 
**- enol,**  **spirodiclofen -**  **ketohydroxy and spirodiclofen -** **dihydroxy )**  **Param eters**  **Values & Units Sources**  **Comments** Molecular Weight 414.4 g Mole - 1 MRID 45697217

---- Vapor Pressure 25 oC 5.25E

- 07 Torr MRID 45697217 (parent) ---- Water Solubility @ pH 7.0 and 20 oC 6000 mg/L MRID 45697227 (

- enol) The solubility of Spirodiclofen

enol at neutral pH represents the maximum solubility among the residue concerns Hydrolysis Half

- Life (pH 7) Stable MRID 45697217 Sum of spirodiclofen and

- enol = 100% of applied at 30 days at pH 7 Aerobic Soil Metabolism t 1⁄2 , 75.8 days (90% upper conf. bound on 5 values) (Sandy loam 119.5 days Sandy loam 25.7 days Sand 46.8 days Loamy Sand 25.7 days Silt 17.6 days) MRIDs 45697

-204,

-208, &

-228 (parent) Half

- life of these soils were based on sum of spirodiclofen,

- enol,

- dihydroxy, and

- ketohydroxy.

Aerobic aquatic metabolism 151.6 day (75.8*2) MRID 45697205 (parent) Stable in two different systems

based on sum of spirodiclofen and

- enol. Spirodiclofen

- enol wa s detected in the water, sediment and total system, but wa s variable and showed no clear pattern of decline. 2X of Soil aerobic half

- life was used according to EFED’s input Guidelines ‡

.

###   6   27

**Table 3. PRZ M/EXAMS Input Param** **eter s for spirodiclofen and its degradates (spirodiclofen** 
**- enol,**  **spirodiclofen -**  **ketohydroxy and spirodiclofen -** **dihydroxy )**  Direct Aqueous Photolysis 25.4 days MRID 45697218 Based on sum of spirodiclofen and

- enol. Adjusted for 12

- hour light/dark cycle; stable in dark control. Soil Water Partition Coefficient (Koc) 17.79 L Kg- 1 (mean of 4 values ) MRID 456972213 (

- enol) Mean Koc of Spirodiclofen

enol was used ,which represents least adsorption among parent and degradates. Application Method Ground Spray (Air blast) CAM § = 2 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR ----
Spray Efficiency 99% According to EFED’s input Guidelines ‡ Standard assumption
Spray Drift (air blast) 0.063 According to EFED’s input Guidelines ‡ Standard assumption


### CROP MANAGEMENT **Crop (Scenarios)**  **Pesticide application**  **rate Application Date**  **Sources Comments** 

Citrus (FL Citrus) 0.31lbs ai/A , 1 application May 15 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR No application date available.

Spring date used

Pome Fruits (OR apple and PA apple) 0.28 lbs ai/A , 1 application May 15 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR
Stone Fruits (GA Peaches) 0.28 lbs ai/A , 1 application May 15 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR
Grapes (CA Grapes) 0.53 lbs ai/A , 1 application May 15 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR

###   7   27

**Table 3. PRZ M/EXAMS Input Param** **eter s for spirodiclofen and its degradates (spirodiclofen** 
**- enol,**  **spirodiclofen -**  **ketohydroxy and spirodiclofen -** **dihydroxy )**  Tree Nut Crops (GA Pecan) 0.53lbs ai/A , 1 application May 15 Envidor ® 2 SC

Miticide Label ( EPA Reg. No. 3125

-LOR

‡ Guidance for selecting input parameters in modeling for environmental fate and transport of pesticides. Version II. February 28, 2002. § Chemical Application Method, PRZM 3.1 User manual (1997), National Exposure Research Laboratory, USEPA, Athens, GA.

**Table 4. SCIGROW Input Param eters for Spirodiclofen and its degradates (spirodiclofen** 
**- enol,**  **spirodiclofen -**  **ketohydroxy and spirodiclofen -** **dihydroxy )**  **Param eter**  **Values & Units Sources**  **Comments** Application Rate and frequency 0.53 lbs ai/A , 1 application Envidor ® 2 SC Miticide Label ( EPA Reg. No. 3125

-LOR Maximum application rate

Organic Carbon Partition Coefficient (median KOC) 15.68 L Kg- 1 (median of 4 values ‡ ) MRID 456972213 (

- enol) Median Koc of Spirodiclofen

enol was used ,which represents the least adsorption among parent and degradates. Aerobic Soil Metabolism Half

- Life 25.7 days (median value ‡ ) (Sandy loam 119.5 days Sandy loam 25.7 days Sand 46.8 days Loamy Sand 25.7 days Silt 17.6 days) MRIDs 45697

-204,

-20 8, &

-228 (parent) Half

- life of these soils were based on sum of spirodiclofen,

- enol,

- dihydroxy, and

- ketohydroxy.

‡ Guidance for selecting input parameters in modeling for environmental fate and transport of pesticides. Version II. February 28, 2002.

###   8   27 

## APPENDIX A

- 1. PRZM/EXAMS OUTPUT FILES
stored as FLcitrus.out Chemical: Spirodiclofen PRZM environment: FLcitrusC.txt EXAMS environment: ir298.exv Metfile: w12842.dvf **Water segment concentrations (ppb)** Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 1.39 1.35 1.26 1.08 0.96 0.35 1962 1.47 1.43 1.29 1.05 0.93 0.36 1963 0.88 0.86 0.80 0.75 0.70 0.29 1964 3.15 3.10 2.87 2.41 2.08 0.79 1965 2.88 2.82 2.57 2.07 1.77 0.73 1966 8.62 8.42 7.61 6.11 5.22 1.89 1967 1.34 1.31 1.24 1.07 0.97 0.52 1968 4.42 4.31 3.89 3.11 2.66 0.98 1969 27.20 26.55 24.11 19.24 16.35 5.75 1970 14.36 14.02 12.97 10.38 8.82 3.46 1971 44.15 43.10 38.98 31.12 26.48 9.39 1972 2.86 2.81 2.58 2.16 1.90 1.06 1973 0.86 0.83 0.75 0.67 0.60 0.25 1974 2.09 2.04 1.86 1.49 1.27 0.49 1975 1.43 1.39 1.27 1.03 0.93 0.37 1976 49.18 48.13 43.63 34.97 29.79 10.35 1977 3.46 3.40 3.16 2.68 2.37 1.34 1978 5.19 5.06 4.76 3.85 3.27 1.19 1979 7.46 7.28 6.57 5.22 4.50 1.67 1980 1.72 1.68 1.53 1.37 1.20 0.54 1981 4.43 4.32 4.05 3.33 2.85 1.04 1982 4.15 4.08 3.86 3.11 2.65 1.01 1983 27.45 26.78 24.20 19.28 16.39 5.72 1984 6.54 6.38 5.75 4.58 3.90 1.84 1985 10.83 10.60 9.60 7.65 6.50 2.35 1986 1.18 1.15 1.06 1.00 0.90 0.53 1987 9.66 9.43 8.51 6.79 5.76 2.01 1988 2.64 2.57 2.33 2.03 1.76 0.77 1989 1.29 1.26 1.13 0.91 0.85 0.37 1990 1.48 1.44 1.35 1.11 0.97 0.37 Sorted results Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 49.18 48.13 43.63 34.97 29.79 10.35 0.06 44.15 43.10 38.98 31.12 26.48 9.39 0.10 27.45 26.78 24.20 19.28 16.39 5.75 0.13 27.20 26.55 24.11 19.24 16.35 5.72 0.16 14.36 14.02 12.97 10.38 8.82 3.46 0.19 10.83 10.60 9.60 7.65 6.50 2.35 0.23 9.66 9.43 8.51 6.79 5.76 2.01

###   9   27 0.26 8.62 8.42 7.61 6.11 5.22 1.89 0.29 7.46 7.28 6.57 5.22 4.50 1.84 0.32 6.54 6.38 5.75 4.58 3.90 1.67 0.35 5.19 5.06 4.76 3.85 3.27 1.34 0.39 4.43 4.32 4.05 3.33 2.85 1.19 0.42 4.42 4.31 3.89 3.11 2.66 1.06 0.45 4.15 4.08 3.86 3.11 2.65 1.04 0.48 3.46 3.40 3.16 2.68 2.37 1.01 0.52 3.15 3.10 2.87 2.41 2.08 0.98 0.55 2.88 2.82 2.58 2.16 1.90 0.79 0.58 2.86 2.81 2.57 2.07 1.77 0.77 0.61 2.64 2.57 2.33 2.03 1.76 0.73 0.65 2.09 2.04 1.86 1.49 1.27 0.54 0.68 1.72 1.68 1.53 1.37 1.20 0.53 0.71 1.48 1.44 1.35 1.11 0.97 0.52 0.74 1.47 1.43 1.29 1.08 0.97 0.49 0.77 1.43 1.39 1.27 1.07 0.96 0.37 0.81 1.39 1.35 1.26 1.05 0.93 0.37 0.84 1.34 1.31 1.24 1.03 0.93 0.37 0.87 1.29 1.26 1.13 1.00 0.90 0.36 0.90 1.18 1.15 1.06 0.91 0.85 0.35 0.94 0.88 0.86 0.80 0.75 0.70 0.29 0.97 0.86 0.83 0.75 0.67 0.60 0.25 0.10 27.43 26.76 24.19 19.28 16.39 5.74 Average of yearly averages: 1.93

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: FLcitrus Metfile: w12842.dvf PRZM scenario: FLcitrusC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol Henry's Law Const. henry atm
- m^3/m ol Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic kbacw 151.6 days Halfife

###   10   27

Aquatic Metabolism

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life Method: CAM 2 integer See PRZM manual Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.35 kg/ha Application Efficiency: APPEFF 0.99 fraction Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)
stored as PAapple.out Chemical: Spirodiclofen PRZM environment: PAappleC.txt EXAMS environment: ir298.exv Metfile: w14737.dvf **Water segment concentrations (ppb)** Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 0.76 0.75 0.71 0.61 0.62 0.30 1962 1.50 1.47 1.38 1.20 1.09 0.58 1963 0.94 0.93 0.88 0.77 0.70 0.43 1964 1.10 1.08 1.02 0.91 0.86 0.46 1965 0.91 0.90 0.84 0.80 0.73 0.41 1966 0.84 0.83 0.80 0.71 0.64 0.35 1967 6.36 6.26 5.88 5.12 4.64 2.00

###   11   27 1968 3.30 3.25 3.08 2.70 2.44 1.59 1969 1.31 1.29 1.22 1.13 1.04 0.68 1970 1.22 1.20 1.14 1.01 0.92 0.49 1971 1.20 1.19 1.13 0.98 0.92 0.48 1972 7.22 7.13 6.72 5.87 5.28 2.30 1973 2.65 2.62 2.47 2.15 1.98 1.37 1974 1.81 1.78 1.71 1.49 1.34 0.80 1975 1.35 1.33 1.25 1.11 1.04 0.61 1976 0.89 0.88 0.84 0.78 0.72 0.41 1977 1.79 1.76 1.65 1.43 1.29 0.64 1978 2.07 2.05 1.93 1.74 1.58 0.80 1979 5.85 5.78 5.48 4.79 4.32 1.96 1980 1.43 1.42 1.36 1.25 1.16 0.86 1981 4.10 4.04 3.83 3.34 3.01 1.37 1982 6.31 6.24 5.92 5.19 4.68 2.26 1983 1.82 1.80 1.72 1.54 1.39 1.03 1984 5.86 5.78 5.62 4.96 4.47 2.00 1985 1.43 1.42 1.35 1.24 1.15 0.87 1986 3.71 3.66 3.46 3.02 2.73 1.26 1987 1.18 1.16 1.10 1.00 0.92 0.65 1988 6.75 6.66 6.29 5.48 4.92 2.15 1989 6.07 5.99 5.77 5.12 4.63 2.39 1990 5.83 5.76 5.41 4.70 4.23 2.25 Sorted results Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 7.22 7.13 6.72 5.87 5.28 2.39 0.06 6.75 6.66 6.29 5.48 4.92 2.30 0.10 6.36 6.26 5.92 5.19 4.68 2.26 0.13 6.31 6.24 5.88 5.12 4.64 2.25 0.16 6.07 5.99 5.77 5.12 4.63 2.15 0.19 5.86 5.78 5.62 4.96 4.47 2.00 0.23 5.85 5.78 5.48 4.79 4.32 2.00 0.26 5.83 5.76 5.41 4.70 4.23 1.96 0.29 4.10 4.04 3.83 3.34 3.01 1.59 0.32 3.71 3.66 3.46 3.02 2.73 1.37 0.35 3.30 3.25 3.08 2.70 2.44 1.37 0.39 2.65 2.62 2.47 2.15 1.98 1.26 0.42 2.07 2.05 1.93 1.74 1.58 1.03 0.45 1.82 1.80 1.72 1.54 1.39 0.87 0.48 1.81 1.78 1.71 1.49 1.34 0.86 0.52 1.79 1.76 1.65 1.43 1.29 0.80 0.55 1.50 1.47 1.38 1.25 1.16 0.80 0.58 1.43 1.42 1.36 1.24 1.15 0.68 0.61 1.43 1.42 1.35 1.20 1.09 0.65 0.65 1.35 1.33 1.25 1.13 1.04 0.64 0.68 1.31 1.29 1.22 1.11 1.04 0.61 0.71 1.22 1.20 1.14 1.01 0.92 0.58 0.74 1.20 1.19 1.13 1.00 0.92 0.49 0.77 1.18 1.16 1.10 0.98 0.92 0.48

###   12   2 7 0.81 1.10 1.08 1.02 0.91 0.86 0.46 0.84 0.94 0.93 0.88 0.80 0.73 0.43 0.87 0.91 0.90 0.84 0.78 0.72 0.41 0.90 0.89 0.88 0.84 0.77 0.70 0.41 0.94 0.84 0.83 0.80 0.71 0.64 0.35 0.97 0.76 0.75 0.71 0.61 0.62 0.30 0.10 6.35 6.26 5.91 5.18 4.68 2.26 Average of yearly averages: 1.12

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: PAapple Metfile: w14737.dvf PRZM scenario: PAappleC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol Henry's Law Const. henry atm
- m^3/m ol Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic Aquatic Metabolism kbacw 151.6 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life Method: CAM 2 integer See PRZM manual Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.31 kg/ha Application Efficiency: APPEFF 0.99 fraction Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm

###   13   27

Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)
stored as ORapple.out Chemical: Spirodiclofen PRZM environment: ORappleC.txt EXAMS environment: ir298.exv Metfile: w24229.dvf **Water segment concentrations (ppb)**  Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 0.71 0.70 0.68 0.61 0.56 0.26 1962 0.85 0.84 0.81 0.74 0.68 0.38 1963 0.88 0.88 0.84 0.76 0.71 0.41 1964 0.90 0.89 0.85 0.78 0.72 0.43 1965 0.90 0.89 0.86 0.78 0.72 0.42 1966 0.90 0.89 0.85 0.80 0.77 0.46 1967 0.92 0.91 0.88 0.79 0.73 0.44 1968 2.12 2.10 2.07 1.90 1.76 0.91 1969 1.17 1.16 1.11 1.02 0.95 0.67 1970 0.96 0.95 0.91 0.82 0.76 0.48 1971 0.92 0.91 0.87 0.79 0.74 0.48 1972 0.94 0.94 0.90 0.82 0.76 0.46 1973 0.90 0.89 0.85 0.77 0.71 0.42 1974 0.89 0.88 0.85 0.77 0.71 0.41 1975 0.89 0.88 0.85 0.77 0.71 0.41 1976 0.89 0.88 0.85 0.77 0.71 0.42 1977 0.99 0.98 0.95 0.90 0.85 0.49 1978 0.94 0.93 0.89 0.81 0.75 0.46 1979 0.90 0.89 0.85 0.77 0.71 0.45 1980 0.94 0.93 0.90 0.85 0.80 0.48 1981 0.91 0.90 0.87 0.85 0.79 0.47 1982 0.91 0.90 0.87 0.78 0.72 0.43 1983 0.89 0.88 0.84 0.76 0.71 0.42 1984 0.94 0.93 0.90 0.85 0.80 0.46 1985 2.16 2.14 2.05 1.83 1.68 0.89 1986 1.18 1.16 1.12 1.01 0.94 0.68 1987 0.97 0.96 0.92 0.83 0.77 0.48 1988 0.90 0.89 0.85 0.81 0.75 0.44 1989 1.12 1.11 1.07 0.97 0.92 0.52 1990 0.94 0.93 0.90 0.83 0.77 0.47 Sorted results

###   14   27 Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 2.16 2.14 2.07 1.90 1.76 0.91 0.06 2.12 2.10 2.05 1.83 1.68 0.89 0.10 1.18 1.16 1.12 1.02 0.95 0.68 0.13 1.17 1.16 1.11 1.01 0.94 0.67 0.16 1.12 1.11 1.07 0.97 0.92 0.52 0.19 0.99 0.98 0.95 0.90 0.85 0.49 0.23 0.97 0.96 0.92 0.85 0.80 0.48 0.26 0.96 0.95 0.91 0.85 0.80 0.48 0.29 0.94 0.94 0.90 0.85 0.79 0.48 0.32 0.94 0.93 0.90 0.83 0.77 0.48 0.35 0.94 0.93 0.90 0.83 0.77 0.47 0.39 0.94 0.93 0.90 0.82 0.77 0.47 0.42 0.94 0.93 0.89 0.82 0.76 0.46 0.45 0.92 0.91 0.88 0.81 0.76 0.46 0.48 0.92 0.91 0.87 0.81 0.75 0.46 0.52 0.91 0.90 0.87 0.80 0.75 0.46 0.55 0.91 0.90 0.87 0.79 0.74 0.45 0.58 0.90 0.89 0.86 0.79 0.73 0.44 0.61 0.90 0.89 0.85 0.78 0.72 0.44 0.65 0.90 0.89 0.85 0.78 0.72 0.43 0.68 0.90 0.89 0.85 0.78 0.72 0.43 0.71 0.90 0.89 0.85 0.77 0.71 0.42 0.74 0.90 0.89 0.85 0.77 0.71 0.42 0.77 0.89 0.88 0.85 0.77 0.71 0.42 0.81 0.89 0.88 0.85 0.77 0.71 0.42 0.84 0.89 0.88 0.85 0.77 0.71 0.41 0.87 0.89 0.88 0.84 0.76 0.71 0.41 0.90 0.88 0.88 0.84 0.76 0.71 0.41 0.94 0.85 0.84 0.81 0.74 0.68 0.38 0.97 0.71 0.70 0.68 0.61 0.56 0.26 0.10 1.17 1.16 1.12 1.02 0.95 0.68 Average of yearly averages: 0.49

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: ORapple Metfile: w24229.dvf PRZM scenario: ORappleC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol Henry's Law Const. henry atm
- m^3/m ol

###   15   27

Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic Aquatic Metabolism kbacw 151.6 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life Method: CAM 2 integer See PRZM manual Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.31 kg/ha Application Efficiency: APPEFF 0.99 fraction Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)

stored as GAPecan.out Chemical: Spirodiclofen PRZM environment: GAPecansC.txt EXAMS environment: ir298.exv Metfile: w93805.dvf **Water segment concentrations (ppb)** Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 1.36 1.30 1.18 0.92 0.76 0.25 1962 1.37 1.32 1.16 1.02 0.87 0.29 1963 7.05 6.86 6.09 4.61 3.80 1.23 1964 2.65 2.56 2.24 1.71 1.51 0.56 1965 2.73 2.64 2.33 1.78 1.56 0.56

###   16   27 1966 7.32 7.10 6.26 4.75 3.91 1.28 1967 17.53 17.00 14.93 11.29 9.30 3.03 1968 1.48 1.43 1.36 1.07 0.89 0.40 1969 2.59 2.51 2.22 1.69 1.39 0.45 1970 1.48 1.43 1.31 1.11 0.93 0.32 1971 2.10 2.04 1.80 1.41 1.17 0.39 1972 3.86 3.75 3.33 2.56 2.11 0.68 1973 4.88 4.73 4.17 3.15 2.59 0.88 1974 14.20 13.77 12.11 9.19 7.58 2.45 1975 2.97 2.89 2.57 1.98 1.64 0.61 1976 2.23 2.16 1.92 1.51 1.26 0.43 1977 5.55 5.38 4.71 3.54 2.91 0.99 1978 1.40 1.36 1.23 0.96 0.79 0.30 1979 5.28 5.12 4.51 3.51 2.92 0.97 1980 2.85 2.78 2.46 1.88 1.57 0.54 1981 1.38 1.34 1.18 0.92 0.77 0.27 1982 2.77 2.69 2.39 1.86 1.59 0.53 1983 16.86 16.36 14.42 10.96 9.02 2.88 1984 3.50 3.43 3.04 2.31 1.95 0.74 1985 1.64 1.59 1.42 1.17 0.98 0.34 1986 2.71 2.63 2.31 1.79 1.49 0.49 1987 5.83 5.65 4.98 3.80 3.13 1.01 1988 1.39 1.35 1.20 0.91 0.75 0.27 1989 3.50 3.40 3.00 2.28 1.92 0.63 1990 1.38 1.34 1.18 0.92 0.77 0.27 Sorted results Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 17.53 17.00 14.93 11.29 9.30 3.03 0.06 16.86 16.36 14.42 10.96 9.02 2.88 0.10 14.20 13.77 12.11 9.19 7.58 2.45 0.13 7.32 7.10 6.26 4.75 3.91 1.28 0.16 7.05 6.86 6.09 4.61 3.80 1.23 0.19 5.83 5.65 4.98 3.80 3.13 1.01 0.23 5.55 5.38 4.71 3.54 2.92 0.99 0.26 5.28 5.12 4.51 3.51 2.91 0.97 0.29 4.88 4.73 4.17 3.15 2.59 0.88 0.32 3.86 3.75 3.33 2.56 2.11 0.74 0.35 3.50 3.43 3.04 2.31 1.95 0.68 0.39 3.50 3.40 3.00 2.28 1.92 0.63 0.42 2.97 2.89 2.57 1.98 1.64 0.61 0.45 2.85 2.78 2.46 1.88 1.59 0.56 0.48 2.77 2.69 2.39 1.86 1.57 0.56 0.52 2.73 2.64 2.33 1.79 1.56 0.54 0.55 2.71 2.63 2.31 1.78 1.51 0.53 0.58 2.65 2.56 2.24 1.71 1.49 0.49 0.61 2.59 2.51 2.22 1.69 1.39 0.45 0.65 2.23 2.16 1.92 1.51 1.26 0.43 0.68 2.10 2.04 1.80 1.41 1.17 0.40 0.71 1.64 1.59 1.42 1.17 0.98 0.39

###   17   27 0.74 1.48 1.43 1.36 1.11 0.93 0.34 0.77 1.48 1.43 1.31 1.07 0.89 0.32 0.81 1.40 1.36 1.23 1.02 0.87 0.30 0.84 1.39 1.35 1.20 0.96 0.79 0.29 0.87 1.38 1.34 1.18 0.92 0.77 0.27 0.90 1.38 1.34 1.18 0.92 0.77 0.27 0.94 1.37 1.32 1.18 0.92 0.76 0.27 0.97 1.36 1.30 1.16 0.91 0.75 0.25 0.10 13.51 13.10 11.53 8.75 7.21 2.34 Average of yearly averages: 0.80

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: GAPecan Metfile: w93805.dvf PRZM scenario: GAPecansC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol Henry's Law Const. henry atm
- m^3/m ol Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic Aquatic Metabolism kbacw 151.6 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life Method: CAM 2 integer See PRZM manual Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.59 kg/ha Application Efficiency: APPEFF 0.99 fraction

###   18   27

Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)

stored as GApeach.out Chemical: Spirodiclofen PRZM environment: GAPeachesC.txt EXAMS environment: ir298.exvMetfile: w03813.dvf

**Water segment concentrations (ppb)** Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 0.71 0.70 0.67 0.60 0.55 0.24 1962 2.54 2.51 2.36 2.05 1.85 0.86 1963 2.72 2.68 2.53 2.21 2.00 1.08 1964 1.13 1.12 1.06 0.92 0.84 0.59 1965 0.88 0.87 0.83 0.76 0.70 0.40 1966 1.01 1.00 0.95 0.85 0.77 0.41 1967 1.44 1.42 1.34 1.18 1.08 0.58 1968 6.67 6.59 6.27 5.51 5.00 2.29 1969 1.75 1.74 1.69 1.58 1.50 1.07 1970 0.98 0.96 0.92 0.81 0.73 0.45 1971 5.03 4.97 4.72 4.13 3.73 1.66 1972 1.65 1.63 1.55 1.36 1.33 0.96 1973 2.53 2.50 2.36 2.06 1.86 0.97 1974 4.10 4.05 3.83 3.37 3.06 1.52 1975 1.44 1.42 1.35 1.21 1.11 0.80 1976 4.55 4.50 4.32 3.84 3.48 1.63 1977 1.40 1.39 1.31 1.15 1.07 0.80 1978 0.91 0.90 0.86 0.76 0.69 0.40 1979 0.84 0.83 0.79 0.70 0.64 0.34 1980 0.83 0.82 0.78 0.68 0.61 0.32 1981 1.94 1.91 1.78 1.54 1.39 0.68 1982 1.04 1.02 0.99 0.88 0.79 0.50 1983 1.53 1.51 1.43 1.24 1.11 0.58 1984 2.13 2.11 1.98 1.73 1.56 0.81 1985 1.03 1.02 0.96 0.84 0.76 0.49 1986 0.85 0.84 0.80 0.69 0.62 0.34 1987 0.83 0.81 0.77 0.74 0.69 0.36 1988 0.85 0.84 0.80 0.71 0.65 0.36 1989 0.84 0.83 0.79 0.69 0.63 0.34

###   19   27 1990 0.83 0.82 0.78 0.68 0.61 0.32 Sorted results Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 6.67 6.59 6.27 5.51 5.00 2.29 0.06 5.03 4.97 4.72 4.13 3.73 1.66 0.10 4.55 4.50 4.32 3.84 3.48 1.63 0.13 4.10 4.05 3.83 3.37 3.06 1.52 0.16 2.72 2.68 2.53 2.21 2.00 1.08 0.19 2.54 2.51 2.36 2.06 1.86 1.07 0.23 2.53 2.50 2.36 2.05 1.85 0.97 0.26 2.13 2.11 1.98 1.73 1.56 0.96 0.29 1.94 1.91 1.78 1.58 1.50 0.86 0.32 1.75 1.74 1.69 1.54 1.39 0.81 0.35 1.65 1.63 1.55 1.36 1.33 0.80 0.39 1.53 1.51 1.43 1.24 1.11 0.80 0.42 1.44 1.42 1.35 1.21 1.11 0.68 0.45 1.44 1.42 1.34 1.18 1.08 0.59 0.48 1.40 1.39 1.31 1.15 1.07 0.58 0.52 1.13 1.12 1.06 0.92 0.84 0.58 0.55 1.04 1.02 0.99 0.88 0.79 0.50 0.58 1.03 1.02 0.96 0.85 0.77 0.49 0.61 1.01 1.00 0.95 0.84 0.76 0.45 0.65 0.98 0.96 0.92 0.81 0.73 0.41 0.68 0.91 0.90 0.86 0.76 0.70 0.40 0.71 0.88 0.87 0.83 0.76 0.69 0.40 0.74 0.85 0.84 0.80 0.74 0.69 0.36 0.77 0.85 0.84 0.80 0.71 0.65 0.36 0.81 0.84 0.83 0.79 0.70 0.64 0.34 0.84 0.84 0.83 0.79 0.69 0.63 0.34 0.87 0.83 0.82 0.78 0.69 0.62 0.34 0.90 0.83 0.82 0.78 0.68 0.61 0.32 0.94 0.83 0.81 0.77 0.68 0.61 0.32 0.97 0.71 0.70 0.67 0.60 0.55 0.24 0.10 4.50 4.45 4.27 3.79 3.44 1.62 Average of yearly averages: 0.74

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: GApeach Metfile: w03813.dvf PRZM scenario: GAPeachesC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol

###   20   27

Henry's Law Const. henry atm
- m^3/m ol Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic Aquatic Metabolism kbacw 151.6 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.31 kg/ha Application Efficiency: APPEFF 0.99 fraction Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)

stored as CAgrape.out Chemical: Spirodiclofen PRZM environment: CAgrapesC.txt EXAMS environment: ir298.exv Metfile: w93193.dvf

###   21   27 **Water segment concentrations (ppb)** Year Peak 96 hr 21 Day 60 Day 90 Day Yearly 1961 1.36 1.34 1.30 1.18 1.09 0.54 1962 1.91 1.90 1.84 1.68 1.56 0.98 1963 1.90 1.89 1.83 1.68 1.57 0.99 1964 1.93 1.91 1.85 1.70 1.58 1.03 1965 2.02 2.00 1.93 1.78 1.66 1.09 1966 1.95 1.93 1.86 1.69 1.57 1.00 1967 1.91 1.89 1.83 1.67 1.54 0.96 1968 1.89 1.87 1.81 1.64 1.51 1.05 1969 2.19 2.17 2.09 1.92 1.78 1.21 1970 1.98 1.96 1.89 1.72 1.58 1.03 1971 2.08 2.07 2.00 1.88 1.75 1.11 1972 2.02 2.00 1.91 1.85 1.73 1.11 1973 1.99 1.97 1.90 1.71 1.58 1.04 1974 1.92 1.91 1.84 1.67 1.54 1.01 1975 2.05 2.03 1.96 1.79 1.66 1.10 1976 1.98 1.96 1.89 1.73 1.61 1.06 1977 1.97 1.96 1.90 1.72 1.59 1.02 1978 1.91 1.89 1.82 1.66 1.58 1.18 1979 2.28 2.26 2.17 1.97 1.81 1.26 1980 1.95 1.93 1.87 1.71 1.58 1.00 1981 1.88 1.87 1.80 1.61 1.47 0.91 1982 1.84 1.83 1.76 1.62 1.50 1.04 1983 2.16 2.14 2.07 1.88 1.74 1.18 1984 1.93 1.91 1.84 1.66 1.52 0.95 1985 1.82 1.81 1.74 1.56 1.43 0.87 1986 1.81 1.80 1.73 1.56 1.43 0.87 1987 5.97 5.92 5.69 5.14 4.77 2.45 1988 2.94 2.92 2.83 2.58 2.37 1.81 1989 2.12 2.10 2.03 1.85 1.70 1.20 1990 3.74 3.71 3.55 3.19 2.93 1.70 Sorted results Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly 0.03 5.97 5.92 5.69 5.14 4.77 2.45 0.06 3.74 3.71 3.55 3.19 2.93 1.81 0.10 2.94 2.92 2.83 2.58 2.37 1.70 0.13 2.28 2.26 2.17 1.97 1.81 1.26 0.16 2.19 2.17 2.09 1.92 1.78 1.21 0.19 2.16 2.14 2.07 1.88 1.75 1.20 0.23 2.12 2.10 2.03 1.88 1.74 1.18 0.26 2.08 2.07 2.00 1.85 1.73 1.18 0.29 2.05 2.03 1.96 1.85 1.70 1.11 0.32 2.02 2.00 1.93 1.79 1.66 1.11 0.35 2.02 2.00 1.91 1.78 1.66 1.10 0.39 1.99 1.97 1.90 1.73 1.61 1.09 0.42 1.98 1.96 1.90 1.72 1.59 1.06 0.45 1.98 1.96 1.89 1.72 1.58 1.05

###   22   27 0.48 1.97 1.96 1.89 1.71 1.58 1.04 0.52 1.95 1.93 1.87 1.71 1.58 1.04 0.55 1.95 1.93 1.86 1.70 1.58 1.03 0.58 1.93 1.91 1.85 1.69 1.58 1.03 0.61 1.93 1.91 1.84 1.68 1.57 1.02 0.65 1.92 1.91 1.84 1.68 1.57 1.01 0.68 1.91 1.90 1.84 1.67 1.56 1.00 0.71 1.91 1.89 1.83 1.67 1.54 1.00 0.74 1.91 1.89 1.83 1.66 1.54 0.99 0.77 1.90 1.89 1.82 1.66 1.52 0.98 0.81 1.89 1.87 1.81 1.64 1.51 0.96 0.84 1.88 1.87 1.80 1.62 1.50 0.95 0.87 1.84 1.83 1.76 1.61 1.47 0.91 0.90 1.82 1.81 1.74 1.56 1.43 0.87 0.94 1.81 1.80 1.73 1.56 1.43 0.87 0.97 1.36 1.34 1.30 1.18 1.09 0.54 0.10 2.88 2.85 2.76 2.52 2.32 1.66 Average of yearly averages: 1.12

Inputs generated by pe4.pl
- 8
-August
- 2003 Data used for this run: Output File: CAgrape Metfile: w93193.dvf PRZM scenario: CAgrapesC.txt EXAMS environment file: ir298.exv Chemical Name: Spirodiclofen Description Variable

Name Value Units Comments Molecular weight mwt 411.4 g/mol Henry's Law Const. henry atm
- m^3/m ol Vapor Pressure vapr 5.25E

- 07 torr Solubility sol 6000 mg /L Kd Kd mg /L Koc Koc 17.79 mg /L Photolysis half
- life kdp 25.4 days Half
- life Aerobic Aquatic Metabolism kbacw 151.6 days Halfife

Anaerobic Aquatic Metabolism kbacs days Halfife

Aerobic Soil Metabolism asm 75.8 days Halfife Hydrolysis: pH 7 0 days Half
- life

###   23   27

Method: CAM 2 integer See PRZM manual Incorporation Depth: DEPI 0 cm Application Rate: TAPP 0.59 kg/ha Application Efficiency: APPEFF 0.99 fraction Spray Drift DRFT 0.063 fraction of application rate applied to pond Application Date Date 15
- 5 dd/mm or dd/mmm or dd
- mm or dd
- mmm Record 17: FILTRA

IPSCND 1 UPTKF Record 18: PLVKRT

PLDKRT FEXTRC 0.5 Flag for Index Res. Run IR IR Flag for runoff calc. RUNOFF total none, monthly or total(average of entire run)

###   24   27



## Appendix A

- 2. Truncated PRZM/EXAMS Time

- Series Output
stored as FlcitrusTS.out Chemical: Spirodiclofen PRZM environment: FLcitrusC.txt EXAMS environment: ir298.exv
**Time**
**- Seris** 
**- Surface Water**  **Day Date**  **Conc**

**(m g/L)**  0 1/1/61 0.00E+00 1 1/2/61 0.00E+00 2 1/3/61 0.00E+00 3 1/4/61 0.00E+00 4 1/5/61 0.00E+00 5 1/6/61 0.00E+00 6 1/7/61 0.00E+00 7 1/8/61 0.00E+00 8 1/9/61 0.00E+00 9 1/10/61 0.00E+00 10 1/11/61 0.00E+00 11 1/12/61 0.00E+00 12 1/13/61 0.00E+00 13 1/14/61 0.00E+00 14 1/15/61 0.00E+00 15 1/16/61 0.00E+00 16 1/17/61 0.00E+00 17 1/18/61 0.00E+00 18 1/19/61 0.00E+00 19 1/20/61 0.00E+00 20 1/21/61 0.00E+00 21 1/22/61 0.00E+00 22 1/23/61 0.00E+00 23 1/24/61 0.00E+00 24 1/25/61 0.00E+00 25 1/26/61 0.00E+00 26 1/27/61 0.00E+00 27 1/28/61 0.00E+00 28 1/29/61 0.00E+00 29 1/30/61 0.00E+00 30 1/31/61 0.00E+00
**  
**  ** **
  ** 
**   10926 12/1/90 1.34E
- 04 10927 12/2/90 1.33E
- 04 10928 12/3/90 1.31E
- 04 10929 12/4/90 1.31E
- 04 10930 12/5/90 1.29E
- 04

###   25   27 ** Time**
**- Seris** 
**- Surface Water**  **Day Date**  **Conc**

**(m g/L)**  10931 12/6/90 1.28E
- 04 10932 12/7/90 1.26E
- 04 10933 12/8/90 1.25E
- 04 10934 12/9/90 1.24E
- 04 10935 12/10/90 1.23E
- 04 10936 12/11/90 1.21E
- 04 10937 12/12/90 1.20E
- 04 10938 12/13/90 1.19E
- 04 10939 12/14/90 1.17E
- 04 10940 12/15/90 1.17E
- 04 10941 12/16/90 1.16E
- 04 10942 12/17/90 1.14E
- 04 10943 12/18/90 1.13E
- 04 10944 12/19/90 1.12E
- 04 10945 12/20/90 1.10E
- 04 10946 12/21/90 1.10E
- 04 10947 12/22/90 1.09E
- 04 10948 12/23/90 1.08E
- 04 10949 12/24/90 1.06E
- 04 10950 12/25/90 1.05E
- 04 10951 12/26/90 1.04E
- 04 10952 12/27/90 1.04E
- 04 10953 12/28/90 1.03E
- 04 10954 12/29/90 1.01E
- 04 10955 12/30/90 1.00E
- 04 10956 12/31/90 9.92E
- 05 10957 1/1/91 9.83E
- 05

###   26   27 

## APPENDIX A

- 3. SCIGROW OUTPUT FILE

SCIGROW VERSION 2.3 ENVIRONMENTAL FATE AND EFFECTS DIVISION OFFICE OF PESTICIDE PROGRAMS U.S. ENVIRONMENTAL PROTECTION AGENCY SCREENING MODEL FOR AQUATIC PE STICIDE EXPOSURE SciGrow version 2.3 chemical:Spirodiclofen tim e is 12/ 7/2004 10:21:48

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

------------------------------------------------------------------------ 0.530 1.0 0.530 1.57E+01 25.7

---------------------------------------------------------- -------------- groundwater screening cond (ppb) = 4.35E
- 01 **************************************************************************27**



### APPENDIX B. Half

**- life Calculation Methods for Spirodiclofen Total Residue Analysis** 

**First**
**- order linear**  **regression analysis** Half

- lives were calculated using natural log

-transformed (weighted) concentration data from all samples that were greater than the detection limit and using all sampling intervals. A regression line is fitted for the data using the first
- order two

-parameter linear regression equation:
y = -bx + a where a is the y- intercept and b is the rate constant (slope). For spirdiclofen total residues of concern, the concentrations of spirodiclofen, and its

- enol,

- dihydroxy, and

-ketohydroxy transformation products were summed. Not all transformation products were identified and quantified in all studies.