UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
WASHINGTON D.C., 20460
                                   OFFICE OF
                              CHEMICAL SAFETY AND
                             POLLUTION PREVENTION

                                                                               
                                                                               
                                                                PC Code: 046679
                                                            DP Barcode: D409837
                                                                 								415146
      		
Date: September 18, 2013
      
MEMORANDUM
      
SUBJECT:	Fenamidone: Drinking Water Assessment for the Proposed New Uses on Potato Seed, Ginseng, Bulb Onion (Crop Subgroup 3-07A), Green Onion (Crop Subgroup 3-07B), and Succulent Beans for Reason[(R)] 500 SC (44.4% fenamidone) (EPA Reg. No. 264-695)  and Fenamidone Technical EPA Reg. No. 264-693)
            CAS Name: (5S)-3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3-(phenylamino)-4H-imidazol-4-one
			CAS Reg. No.: 161326-34-7
			
	
	FROM:	James K. Wolf, Ph.D., Environmental Scientist
            Environmental Risk Branch III
			Environmental Fate and Effects Division (7507P)
			

THROUGH:	James A Hetrick, Ph.D., Senior Scientist 
            Rosanna Louie-Juzwiak, RAPL
            Dana S. Spatz., Branch Chief 
            Environmental Risk Branch III
			Environmental Fate and Effects Division (7507P)

TO:		Ideliz Encarnacion, Ph.D.
            Michael Metzger, Ph.D., Branch Chief
			Risk Assessment Branch7
            Health Effects Division (7509P)
				
      Barbara Madden, RM 05
			RIMUERB
			Registration Divison (7505P)

The registrant (Bayer Corporation) is seeking to amend the fenamidone label to allow for the potato seed treatment use to replace one of the registered foliar applications for potatoes and the IR-4 is requesting the addition of ginseng, succulent bean, and the expansion of bulb vegetables uses (Crop Subgroups 3-07A and 3-07B, Table 1) to the fenamidone label. The maximum annual fenamidone application rate remains 0.80 lb a.i./A per season [year] for potatoes. Fenamidone is registered for use as a broad spectrum foliar fungicide for control of certain pathogenic fungal diseases in a variety of crops including potatoes and other tuberous and corm vegetables, tomatoes, onions and other bulb vegetables, lettuce, leafy vegetables, Brassica vegetables, tobacco, fruiting vegetables, carrots, cucurbit crops, and treatment of cotton and sunflower seeds as well as in-furrow application before planting of the seeds.

This memo summarizes the Tier II PRZM/EXAMS, PRZM-GW and Tier I SCI-GROW estimated drinking water concentrations (EDWCs) of fenamidone plus its degradation products (i.e., total fenamidone residues of concern or total toxic residues) in surface water and in groundwater for the proposed new uses and label amendments. The metabolites/degradation products, RPA-412636, RPA-412708, RPA-411639, RPA-413255, RPA-409446, and RP- 410995, included in the drinking water total fenamidone residues of concern are listed in Appendix 1 Table 1. The degradation products tend to be more persistent and exhibit greater mobility than parent fenamidone, suggesting the increased potential for degradates leaching to groundwater.

The drinking water EDWCs recommended for use in the human health dietary risk assessment are those estimated for groundwater.  The highest daily total fenamidone residue concentration in shallow groundwater estimated by PRZM-GW is 207ug/L and the average concentration after breakthrough was 139 ug/L (Table 8) for the Central Sands Region of Wisconsin from 30 years of continuous use.  These estimates represent potential exposure to private drinking water well in a highly vulnerable pesticide use area where numerous pesticide residues have been detected in groundwater.

The surface water EDWCs estimated by PRZM/EXAMS are 49.19 ug/L and 12.96 ug/L, for the 1-in-10 year daily peak and annual mean total fenamidone residues concentration, respectively. The 30-year annual mean is 8.21 ug/L (Table 7). 

Previously, total fenamidone residues in surface source drinking water (PRZM/EXAMS) for the 1-in-10 year daily peak and annual mean concentration were 41.66 ug/L and 11.88 ug/L, respectively, and the 30-year annual mean concentration 5.99 ug/L. The estimated total fenamidone residue concentration in shallow groundwater was with SCI-GROW was 178 ug/L (Table 9).


Use Characterization

Fenamidone (REASON 500 SC Fungicide) is the active ingredient (a.i.), in the broad-spectrum foliar fungicide that is applied by ground, chemigation, and/or aerial equipment, and seed treatment (sunflower and tobacco). Currently, the maximum application rate is 0.267 lb a.i./A with a maximum seasonal [annual] rate of 0.80 lb a.i./A, with a minimum 5-day reapplication interval. A previous drinking water assessment was conducted for this maximum use rate.

IR-4 has proposed that fenamidone be applied at rates up to 0.267 lb a.i./A, with a 5 day minimum reapplication interval, and a maximum seasonal rate not to exceed 0.80 lb a.i./A for ginseng and succulent beans (Table 1). For bulb vegetables the maximum application rate for fenamidone is 0.178 lb a.i./A, seasonal maximum rate of 0.71 lb a.i./A per season with a minimum reapplication interval of 5 days. For these uses, the application methods remain ground and aerial spray and chemigation. The registrant (Bayer Corporation) is also seeking to amend the fenamidone label to allow for the potato seed treatment (Table 1) use to replace one of the registered foliar applications for potatoes. The proposed maximum annual fenamidone application rate remains 0.80 lb a.i./A per season for potatoes. Application rates and frequency of application for the proposed amended uses are shown in Table 1. This assessment assumes that 1 season is synonymous with yearly, which is one crop per year.

Table 1. Fenamidone use and application information obtained from the proposed new uses label and the current potato rate for Reason[(R)] 500 SC (44.4% fenamidone) (EPA Reg. No. 264-695).
                                      Use
                            Max. Single App. Rate 
                                  (lb a.i./A)
                                  # of App./
                                    Season
                        Seasonal Max. Rate (lb a.i./A)
                         Minimum App. Interval (days)
 Proposed new uses and label amendment by the IR4 REASON[(R)] 500 SC Fungicide 
              EPA Reg. No. 264-695 (44.4% ai; 4.13 lb ai/gallon)
Bean, Succulent
                                       
                                  Bean, lima
                                  Bean, snap
                                     0.267
                                   NS (3)[a]
                                     0.80
                                       7
Ginseng
                                     0.267
                                   NS (3)[a]
                                     0.80
                                      14
                        Expansion to Full Crop Groups 
Onion bulb, 
                              Sub-group 3-07A[b]
                                     0.178
                                   NS (4)[a]
                                     0.71
                                      5 
Onion, green, 
                              Sub-group 3-07B[b]
                                       
                                       
                                       
                                       
Proposed amendment by Bayer CropScience REASON[(R)] 500 SC Fungicide EPA Reg. No. 264-695 
                        (44.4% ai; 4.13 lbs ai/gallon) 
Potato Seed Treatment[c]
                                   0.237[d]
                        (0.15 fl oz/100 lb seed potato)
                                    See[f]
                                    0.80[e]
                                    5[f]  
Potato Foliar Application
       Currently Approved Label (EPA Reg. No. 264-695: as of 10/27/2011)
Potatoes 
                                     0.267
                                   NS (3)[a]
                                    0.80[e]
                                       5
[a] NS-is not specified (number = maximum growing season rate/maximum rate)
[b] Bulb vegetables: Chive, fresh leaves; Chinese, fresh leaves; daylily, bulb; elegans hosta; fritillaria, bulb; fritillaria, leaves; garlic, bulb; garlic, great-headed, bulb; garlic, serpent, bulb; kurrat; lady's leek; leek; leek, wild; lily, bulb; onion, Beltsville bunching; onion, bulb; onion, Chinese, bulb; onion, fresh, green; onion, macrostem; onion, pearl; onion, potato, bulb; onion, tree, tops; onion, Welsh, tops; shallot, bulbs; shallot, fresh leaves; cultivars, varieties, and/or hybrids of these.
[c] Potato seed-piece treatment (Use rate = 0.15 fl oz per 100 lbs of seed pieces).
[d] 4.13 lb ai/gallon * 1gallon/128 fl oz =  0.03227 lb ai/fl oz
   0.15 fl oz/100 lb psp (potato seed piece) * 0.03227 lb ai/fl oz = 0.004842 lb ai/100 lb psp
   Planting rate 1000 to 4900 lb psp/ac; 0.004842 lb ai/100 lb psp * 4900 lb psp/ac = 0.237 lb a.i./A; could be as high as 0.245 lb a.i./A (MRID 4897701)
[e] Maximum amount of fenamidone per season (year) is 0.80 lb a.i./A.
[f] Additional fenamidone may still applied foliarly, at maximum rate of 0.267 lb a.i./A, with a annual rate not to exceed 0.80 lb a.i./A.

Potato Seed Pieces -  Seed Treatment

The proposed potato seed treatment rate is 0.15 fluid ounces per 100 pounds (cwt) of seed pieces. Potato seed planting rates vary from 1,800 to 4,900 lb potato seed pieces per acre according to information submitted by the registrant (Petition to Establish a Seed Piece Treatment Use with Fenamidone on Potatoes, MRID 48977101).  BEAD reports seed potato rates ranging from 2,100 to 2,700 lb potato seed per acre. Depending upon the seeding rate for the potato pieces, the fenamidone application rate could range from about 0.10 to 0.245 lb a.i./A (Table 2). This assessment uses the maximum rate of 0.245 lb a.i./A as proposed by Bayer CropScience as a conservative maximum application rate for this assessment (MRID 48977101).


Table 2. Conversion of Fenamidone Rate to Potato Seed Piece per 100 lbs to Application Rate on a Pounds ai per acre basis.
                              fl oz/100 lb psp[a]
                                lb ai/fl oz[b]
                               lb ai/100 lb psp
                                 lb psp/ac[c]
                                   lb a.i./A
                                     0.15
                                    0.03227
                                    0.00484
                                     2000
                                     0.097
                                     0.15
                                    0.03227
                                    0.00484
                                     3000
                                     0.145
                                     0.15
                                    0.03227
                                    0.00484
                                     4000
                                     0.194
                                     0.15
                                    0.03227
                                    0.00484
                                     4900
                                   0.237[d]
[a] psp = potato seed piece.
b Reason[(R)] 500 SC 264-695 density = 4.13 lb ai/gallon ; 1 gallon = 128 fl oz; 0.03227 = 4.13/128.
[c] MRID 48977101
[d] Difference between 0.237 and 0.245 lb a.i./A is due rounding during unit conversion calculations.

Fenamidone Chemistry, Environmental Fate and Transport Characterization

Fenamidone is member of the chemical family of fungicides, the imidazolinones (Figure 1). Fenamidone is the S-enantiomer of the racemic mixture A5-Methyl-2- methylthio-5-phenyl-3-phenylamino-3,5-dihydroamino-4-one (IUPAC). The S-enantiomer is claimed to be the fungicide active enantiomer. The amount of S-enantiomer in the active ingredient is greater than 98%. Reason[(R)] 500 SC is a soluble concentrate formulation containing 44.4% fenamidone as the active ingredient, containing 4.13 lbs of fenamidone per gallon of product.


                                       
                                       
                                       
                                       
                             Fenamidone Structure
                                              Chemical Abstracts Registry Number (CAS): 161326-34-7
                                              Empirical Formula: C17H17N3OS
Chemical Abstract Registry Names:
  (S)-3,5-dihydro-5-methyl-2-methylthio-5-phenyl-3- phenylamino-4H-imidazole-4-one;
  (+)-(4S)-4-Methyl-2-methylthio-4-phenyl-(1H)-1-phenylamino-2- imidazolin-5-one
  (5S)-3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3-(phenylamino)-4H-imidazol-4-one
IUPAC Names:
  (+)-4-methyl-2-methylthio-4-phenyl-1-phenylaminoimidazol-1H-5-one;
  (S)-5-Methyl-2- methylthio-5-phenyl-3-phenylamino-3,5-dihyroimidazol-4-one 
  (S)-1-anilino-4-methyl-2-methylthio-4-phenylimidazolin-5-one
USEPA/OPP Chemical Database:
  Imidazol-4-one,3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3- (phenylamino)-, (5S)-)
Other Names:
  4H-Imidazol-4-one, 3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3-(phenylamino)-, (5S)-
  4H-Imidazol-4-one, 3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3-(phenylamino)-, (S)-
  S-5-Methyl-2-methylthio-5-phenyl-3-phenylamino-3,5-dihydro-4H-imidazol-4-one
Figure 1 Chemical Structure, CAS No., Empirical Formula, and Chemicals for Fenamidone.


Environmental Fate Summary

The environmental fate for fenamidone is discussed in detailed in the new chemical assessment USEPA (2002) and is summarized below.

The major route of degradation for fenamidone in the environment is biotransformation under aerobic conditions. Fenamidone is moderately mobile and appears to degrade faster in aerobic soils (half-lives 5 to 8 days) than in aerobic water-sediment systems (half-lives 67 to 128 days). Fenamidone is very stable in anaerobic sediments (half-lives > 1,000 days). In the environmental pH range of 5 to 9, fenamidone is stable towards abiotic hydrolysis. Although direct photolysis occurred rapidly in laboratory studies (half-lives 5 to 6 days) direct photolysis in natural water would be only significant in clear, shallow water. The role of indirect photolysis is not known. Fenamidone poses low concern for volatilization from soil or water and is unlikely to bioaccumulate in fish.

The major, terminal metabolite is the cleavage product (S)-Methyl-5-phenylimidazolidine-2,4-dione (RPA-412636). It can form in aerobic water, aerobic soils, and water-sediment systems, and is a persistent chemical species (aerobic soil half-lives as long as 462 days). In addition, RPA-412636 and its immediate precursor RPA-417208 (cleavage product) are very mobile in soil and can leach to groundwater or be transported to surface water by runoff or spray drift, where they predominantly partition into the water column. The degradates of concern [and studies where they are formed] are RPA-412636, RPA-411639, RPA-413255 [aerobic soil metabolism, aerobic water-sediment systems, and terrestrial field dissipation], RPA-412708  [hydrolysis @ pH 4; 9 and photolysis], and RPA-409446 and RP- 410995 [aerobic soil metabolism]. The summary of degradation processes are found in Appendix 1, Table 1, and the structures are shown in Appendix 1, Table 2.

Hydrolysis was determined not a major degradation pathway, but it is faster at pHs below 5 and above 9 (New Chemical Review, D282668, October 2, 2002).  Assuming pseudo first order kinetics the half-lives of 41.8 days, 223 days, 407 days, and 27.2 days at pH 4, 5, 7, and 9, respectively, were estimated (MRID 453858-29).  EFED has observed that PRZM-GW is more sensitive to pH, even with long half-lives, compared to surface water (PRZM/EXAMS).

The fenamidone degradation products exhibit properties in common with other pesticide residues that are known to dissolve in runoff water to reach surface water bodies and leach to groundwater. Furthermore, fenamidone residues may also reach surface water bodies via erosion or through spray drift. 


Residues of Concern

Throughout this document, fenamidone and its metabolites/ degradates (Appendix 1 Table 1) are named by the company code assigned only to the S-enantiomer. The company code for fenamidone is RPA 407213. On May 25, 2004, the Metabolism Assessment Review Committee (MARC) recommended that, besides parent fenamidone, the additional metabolites/degradation products RPA-412636, RPA-412708, RPA-411639, RPA-413255, RPA-409446, and RP- 410995 [i.e., total fenamidone residues] should be included in the drinking water assessment (Appendix 1 Tables 1 and 2).

Drinking Water Modeling

EFED exposure models were used to estimate the drinking water exposure concentrations for use in the dietary risk assessment of fenamidone. The estimated drinking water concentrations (EDWC) for fenamidone and its residues (total fenamidone residues, TTR) of concern in surface water (Table 7) were estimated using Tier II models (linked PRZM and EXAMS by PE5). 

Tier I and II groundwater EDWCs for fenamidone residues for the proposed new uses were derived with PRZM-GW (Pesticide Root Zone Model for Groundwater, version 1.0, August 31, 2012), using the GW-GUI (Graphical User Interface, version 1.0, August 31, 2012).  PRZM-GW is a one-dimensional, finite-difference model that estimates the concentrations of pesticides in groundwater.  It accounts for pesticide fate in the crop root zone by simulating pesticide transport and degradation through the soil profile after a pesticide is applied to an agricultural field. PRZM-GW permits the assessment of multiple years of pesticide application (up to 30 years) on a single site. Six standard scenarios, each representing a different region known to be vulnerable to groundwater contaminations, are available for use with PRZM-GW for risk assessment purposes. In the PRZM-GW simulations, each of these standard scenarios was used.  PRZM-GW output values represent pesticide concentrations in a vulnerable groundwater supply that is located directly beneath a rural agricultural field. Note that, unlike in surface water modeling, PCAs are not used with PRZM-GW per EFED guidance.  Estimates from PRZM-GW are presented in Table 8.

For comparison purposes, EDWCs were also calculated (Table 9) using the Screening Concentration in Ground Water model (SCI-GROW v2.3, compiled 08/08/03).  SCI-GROW was developed by fitting a linear model to ground water concentrations with the Relative Index of Leaching Potential (RILP) as the independent variable.  Ground water concentrations were taken from 90-day average high concentrations from Prospective Ground Water studies.  The RILP is a function of aerobic soil metabolism and the soil-water partition coefficient.  There is no PCA adjustment for SCI-GROW.  The output of SCI-GROW represents the concentrations of fenamidone total residues that might be expected in shallow unconfined aquifers under sandy soils. 

The input parameters were selected from the physical/chemical properties and environmental fate data submitted by the registrant to support registration of fenamidone. Input parameters were selected in accordance with US EPA-OPP EFED water model parameter selection guidelines, Guidance for Selecting Input Parameters in Modeling the Environmental Fate and Transport of Pesticides and PRZM-GW Input Parameter Guidance. Detailed information about the models, selection of input parameters and scenarios can be obtained from http://www.epa.gov/oppefed1/models/water/index.htm

The drinking water exposure assessment for total fenamidone residues is based on modeling. Modeling for individual residues was not conducted due to lack of environmental fate data. Monitoring data were not available to assess total fenamidone residue concentrations in surface and ground source waters. Because the modeling approach requires use of the cumulative residue degradation half-lives as well as the lowest soil:water partitioning coefficient for fenamidone, the estimated concentration in drinking water are expected to be conservative. 
Fenamidone Total Residues Modeling Input Parameters

The modeling of total fenamidone residues, or total toxic residues (TTR), requires recalculation of cumulative fenamidone residue half-lives from laboratory degradation studies. Recalculation of aerobic soil metabolism half-lives was conducted (see USEPA, 2007) using the summed concentration (expressed as % of applied parent) for parent fenamidone and its degradation products (RPA-412636, RPA-412708, RPA-411639, RPA-413255, RPA-409446, RPA- 410995)[6,]. 

The mobility of total fenamidone residues (TTR) is based on the compound with the lowest soil:water partitioning coefficient. This approach was used to provide a conservative assessment of mobility for the fenamidone residues. Batch equilibrium partition coefficients of fenamidone and its degradation products are shown in Table 3. The batch equilibrium partition coefficient for RPA-412636 was used to represent mobility of total fenamidone residues.

Table 3: Batch Equilibrium Coefficients for Fenamidone and Its Degradation Products
                                 Company Code
                                 Average Koc 
                                   (mL/goc)
                                  Data Source
                                  Fenamidone
                                      368
                                 MRID 45385823
                                  RPA-412636
                                      26
                                 MRID 45385824
                                 RPA-412708[a]
                                      31
                                 MRID 45385825
                                  RPA-411639
                                      611
                                 MRID 45385826
                                  RPA-413255
                                      458
                                 MRID 45385827
                                  RPA-409446
                                    No Data
                                  RPA- 410995
                                    No Data
  [a] May be referred to RPA-412108 in some EFED documents.	

 The environmental fate data used for model inputs (Table 4) are the same as used in the previous drinking water assessment (USEPA, 2007) and followed EFED input guidance.
 
 Table 4. PRZM/EXAMS and PRZM-GW Input Parameters for Total Toxic Fenamidone Residues
                                Model Parameter
                                     Value
                                   Reference
Molecular Weight (g/moles)
                                     311.4
Calculated (MRID 45385704)
Henry's Law Constant (atm-m3/mol)
                                   1.37E-10
Estimated used value for parent
Vapor Pressure (torr)
                                    2.6E-9
Product Chemistry Data used value for parent
Solubility (mg/L)
                                      7.8
Product Chemistry Data used value for parent
Koc (L/mg-OC)[a]
                                     26[a]
MRID 45385824
Photolysis Half-life (days)
                                      5.4
MRID 45385830, 45385831
Hydrolysis @ pH 7 (days)[a]
                                    407[a]
MRID 45385829
Aerobic Soil Half-life (days) ( for TTR)[a]
                                   Stable[a]
MRID 45385819
Aerobic Aquatic Half-life (days)
                                    137.78
MRID 45385821, 45385822
Anaerobic Aquatic Half-life (days)
                                    1386.29
MRID 4540003
[a]  Inputs considered in PRZM-GW.[.]


Previous Drinking Water Assessments 

A drinking water assessment [January 28, 2004 (DP D294195, D 292900)] was previously conducted for uses on lettuce, potato, sweet potato, tomato, bulb vegetables, and cucurbits. This assessment considered fenamidone and its major metabolite RPA-412636. On May 25, 2004 the Metabolism Assessment Review Committee (MARC) recommended that, besides parent fenamidone, additional metabolites should be included in the drinking water assessment (Appendix 1 Table 1). A follow-up drinking water assessment for total fenamidone residues was conducted in 2007 [USEPA, May 14, 2007] to include the additional metabolites/degradates using the total toxic residues (TTR). Total fenamidone residues (or TTR) in surface source drinking water for were 41.66 ug/L and 11.88 ug/L, the 1-in-10 year daily peak and annual mean concentration, respectively, and 5.99 ug/L the 30-year annual mean concentrations. The total fenamidone residue concentration in shallow groundwater was estimated with SCI-GROW to be 178 ug/L. 

The environmental fate values and the maximum fenamidone application rates used for modeling were the same for this assessment and the previous assessment. Since the application rates are the same, the increase in EDWCs for surface water is for the proposed succulent bean use and is likely due to differences in the scenarios, pesticide application dates, and the occurrence of rainfall events rather than being related to a specific crop. Additionally, the maximum default PCA increased slightly from 0.87 to 0.91 in the recent update (USEPA, 2012). For groundwater the PRZM-GW model considers 30 years of use whereas SCI-GROW only considers one year of pesticide use and did not allow for spatial or temporal differences.


Surface Water

The PRZM scenarios used are summarized in Table 5. The application rates, reapplication intervals, and date first application are also given. The proposed modification to the potato label would allow for the application of fenamidone as a potato seed treatment in addition to the foliar applications. A non-standard modeling approach was used to assess this seed treatment use on potato pieces followed with two foliar applications. The modeling of potato seed use would be expected to be similar to that of an in-furrow application of a granular pesticide (no spray drift) so it is assumed that application efficiency is 100 percent and spray drift loss is zero and the model setting to account for placement at a specified depth using PRZM chemical application method (CAM) is 8. Depth of potato seed plant varied in literature from about 2 inches to 4 inches (5 to 10 cm). For an incorporation depth of 3-cm or more when PRZM CAM = 8 the surface water EDWCs were 0. The foliar applications would assume standard assumptions (spray drift and incorporation depth) for ground or aerial spray applications.  

To evaluate the difference between application method, a single application of fenamidone assuming treated potato seed (CAM=8 and incorporation depth was 2 cm) was compared to a single foliar application (Table 7). It can be seen that the concentrations from the seed treatment application (e.g., 0.84 ug/L) are less than the foliarly applied applications (e.g., 11.78) (Table 7).  

Therefore, qualitatively it would be expected that a the yearly application of fenamidone to potatoes with one application as a seed treatment and two by aerial spray applications would result in lower EDWCs then with three aerial or ground applications. 

Table 5. Crop management PRZM/EXAMS inputs used in aquatic exposure modeling for Fenamidone.
                          PRZM/EXAMS Input Parameter
                             Input Value and Unit
Labeled Crop 
Crop Scenarios
Application Rate
Yearly Rate (Number of Applications) Retreatment Time Interval 
Application Date (month-day) 
Potato Foliar
FL Potato, ME Potato
* Application Rate: 0.267 lb a.i./A (0.299 kg ai/ha
* 0.80 lb a.i./A per year (3 applications @ max rate)
* 5 days between applications
* First Application Date (month-day):
* FL: 03-04
ME: 07-15

Potato Seed Treatment and Foliar Potato
FL Potato, ME Potato
* Potato Seed: 0.245 lb ai./ac (0.274 kg ai/ha)[a]
* Foliar Application Rate: 0.267 lb a.i./A (0.299 kg ai/ha)
* (1 seed treatment + 2 foliar applications per season)
* 0.80 lb a.i./A per year 
* 5 days between applications
* Planting Date:
* 1[st] Application and 2[nd] Application Date: 
FL: 01-01           FL: 03-04 
FL: 01-01           FL: 03-09
FL: 01-01           FL: 03-14
ME: 07-15         ME : 07-20

Potato Seed Treatment vs Single Foliar Application[b]
FL Potato, ME Potato
* Potato Seed: 0.267 lb ai./ac (0.299 kg ai/ha)[a]
* Foliar Rate: 0.267 lb a.i./A (0.299 kg ai/ha)
* (1 applications per season)
* Planting Date:
* 1[st] Application Date: 
FL: 01-01
      ME: 04-25

Onions, Bulb Vegetables
GA Onion, CA Onion, WA Onion
   * Application Rate: 0.178 lb a.i./A (0.199 kg ai/ha)
   * 0.71 lb a.i./A per year (4 applications @ max rate)
   * 5 days between applications
   * First Application Date: 
GA: 04-15
CA: 02-01
WA: 07-30

Beans, Succulent
MI Bean, OR Snapbean
* Application Rate: 0.267 lb a.i./A (0.299 kg ai/ha)
* 0.80 lb a.i./A per year (3 applications per season)
* 5 days between applications
* First Application Dates:
MI: 08-01
OR: 07-01

Ginseng
MN Sugarbeet
   * Application Rate: 0.267 lb a.i./A (0.299 kg ai/ha)
   * 0.80 lb a.i./A per year (3 applications @ max rate)
   * 3 applications per season at maximum rate
   * 14 days between applications
   * First Application Date: 08-15

MI Asparagus
   * Application Rate: 0.267 lb a.i./A ( 0.299 kg ai/ha)
   * 0.80 lb a.i./A per year (3 applications @ max rate)
   * 3 applications per season at maximum rate
   * 14 days between applications
   * First Application Date: 08-15
Chemical Application Method (CAM)[c]
Aerial and Ground Applications
CAM = 2, linear foliar based on crop canopy
CAM = 8[d] for potato seed treatment; Incorporation depth set as 2 cm
Application Efficiency
Aerial Applications = 0.95
Ground Applications = 0.99
Potato Seed Piece Treatment = 1.0 (same as granular)
Spray Drift Fraction 
Aerial Applications = 0.16
Ground Applications = 0.064
Potato Seed Piece Treatment = 0.00 (same as granular)
[a] Potato seed treatment rate (0.274 kg ai/ha) based upon estimate provide by Registrant (MRID 48977101, pages 6 and 7) EFED estimated a potato seed treatment rate of 0.266 kg ai/ha).
[b] Single application potato seed treatment and aerial foliar application means to evaluate significance of spray drift.
[c] CAM also required for PRZM-GW
[d] Potatoe seed are planted at a depth of 5 to 10 cm, when CAM = 8 was used, any  incorporation (planting depth) of > 3 cm, EDWCs were 0.

GROUNDWATER

Total fenamidone residues were also estimated in groundwater.  Tier I and II groundwater EDWCs for fenamidone residues use were derived with PRZM-GW (Pesticide Root Zone Model for Groundwater, version 1.0, August 31, 2012), using the GW-GUI (Graphical User Interface, version 1.0, August 31, 2012).  

Currently, the environmental fate input parameters are limited to aerobic soil metabolism half-life, hydrolysis, and sorption (Koc) in PRZM-GW (Table 4). Pesticide usage information is limited to rate and number of applications, date of application, and chemical application method (CAM), foliar or soil applied applications. Spray drift and efficiency are not considered. However, wash-off is considered for a foliar application in the same manner as surface water. The six scenarios (Table 8), currently available with PRZM-GW, developed to represent conditions known to be vulnerable to groundwater contamination were also used in this assessment.

Previously, concentrations of total residues in groundwater were estimated using the Screening 
Concentration In Ground Water model (SCI-GROW) (Version 2.3). For comparison purposes, EDWCs were also calculated using the Screening Concentration in Ground Water model (SCI-GROW v2.3, compiled 08/08/03).  

Input parameters for SCI-GROW modeling are shown in Table 6.  SCI-GROW does not differentiate between method of application, but only considers numbers and rate of application.


 Table 6. SCI-GROW Input Parameters for Total Fenamidone
                                Model Parameter
                                     Value
                                   Reference
Koc (L/mg-OC)
                                      26
MRID 45385824
Aerobic Soil Half-life (days)
                                 1000 days[a]
MRID 45385819
[a] Because the SCI-GROW model requires an input value, a half-life of 1000 days was used as a surrogate half-life for total fenamidone residues.


Modeling Results

The EDWCs for total fenamidone residues in surface water for the proposed new uses are predicted to be no greater than 49.19 ug/L and 12.96 ug/L, the 1-in-10 year daily peak and annual mean concentration, respectively, or 8.21 ug/L the 30-year annual mean concentrations (Table 7). The total fenamidone concentrations vary depending upon the application dates and the method of application (e.g., seed treatment or aerial spray) and scenario. The 1-in-10 year peak EDWCs ranged from 6.85 to 49.19 ug/L, the 1-in-10 year average concentrations ranged from 2.71 to 12.96 ug/L, and the 30 year average concentration ranged from 1.80 to 8.21 ug/L. Representative model outputs are included in Appendix 3.


Table 7. PRZM/EXAMS Surface Water EDWCs (with PCA = 0.91)
                                  Modeled Use
                                   Scenario
                            #apps/rate (lb a.i./A)
                                 1-in-10 year
                                30-year average
                                       
                                       
                                       
                                     Peak
                                 10 yr average
                                       
      Comparison of Seed Potato Treatment vs. a Single Foliar Application
                                    [ug/L]
                          Potato (seed treatment)[a]
                                   FL Potato
                                   1 @ 0.267
                                     0.76
                                     0.11
                                     0.03
                              Potato (foliar)[b]
                                   FL Potato
                                   1 @ 0.267
                                     10.72
                                     1.63
                                     0.86
                          Potato (seed treatment)[a1]
                                   ME Potato
                                   1 @ 0.267
                                     0.56
                                     0.15
                                     0.05
                          Potato (seed treatment)[a2]
                                   ME Potato
                                   1 @ 0.267
                                     9.92
                                     2.68
                                     1.26
                              Potato (foliar)[b1]
                                   ME Potato
                                   1 @ 0.267
                                     10.53
                                     2.90
                                     1.48
                              Potato (foliar)[b2]
                                   ME Potato
                                   1 @ 0.267
                                     9.92
                                     2.68
                                     1.26
                  Proposed New Uses and Potato Seed Treatment
                                       
                               Potato (foliar)c 
                                   FL Potato
                                   3 @ 0.267
                                     30.98
                                     5.26
                                     2.78
                              Potato (foliar)[d]
                                   FL Potato
                                   3 @ 0.267
                                     27.69
                                     5.14
                                     2.79
                              Potato (foliar)[e]
                                   FL Potato
                                   3 @ 0.267
                                     36.31
                                     5.36
                                     2.72
                          Potato (foliar no drift)[f]
                                   FL Potato
                                   3 @ 0.267
                                     35.38
                                     4.97
                                     2.19
                          Potato (foliar no drift)[g]
                                   ME Potato
                                   3 @ 0.267
                                     16.53
                                     5.80
                                     2.32
                              Potato (foliar)[h]
                                   ME Potato
                                   3 @ 0.267
                                     19.85
                                     6.93
                                     1.80
                              Potato (foliar)[i]
                                   FL Potato
                                   3 @ 0.267
                                     42.82
                                     5.93
                                     2.28
                          Potato (foliar no drift)[j]
                                   FL Potato
                                   3 @ 0.267
                                     44.10
                                     6.27
                                     2.80
                                       
                                       
                                       
                                       
                           Onions (Bulb Vegetables)
                                   CA Onion
                                  4 @ 0.178 
                                     6.85
                                     2.71
                                     1.99
                                      "
                                   GA Onion
                                  4 @ 0.178 
                                     26.20
                                     4.08
                                     1.98
                                      "
                                   WA Onion
                                  4 @ 0.178 
                                     9.62
                                     4.55
                                     2.93
                               Beans (Succulent)
                                    MI Bean
                                   3 @ 0.267
                                     49.19
                                    12.96 
                                     8.21 
                                      "
                                 OR Snap bean
                                   3 @ 0.267
                                     23.40
                                     5.23
                                     2.45
                                    Ginseng
                                 MN Sugarbeet
                                   3 @ 0.267
                                     31.23
                                     10.70
                                     7.23
                                      "
                                 MI Asparagus
                                   3 @ 0.267
                                     9.80
                                     4.94
                                     3.48
[a] Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[b] Applied via CAM = 2; drift =0.16 and application efficiency = 0.95
[a1] Application Date: 07-15; Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[a2] Application Date: 04-25; Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[b1] Application Date: 07-15; Treated potato seed applied via CAM = 2, 2 cm depth of incorporation; drift=0.16 and application efficiency = 0.95.
[b2] Application Date: 04-25; Treated potato seed applied via CAM = 2, 2 cm depth of incorporation; drift=0.16 and application efficiency = 0.95.
[c] Application dates 01-01; 01-06; 01-11; CAM = 2; drift = 0.16 and application efficiency 0.95.
[d] Application dates 01-01; 03-04; 03-09; CAM = 2; drift = 0.16 and application efficiency 0.95.
[e] Application dates 01-01; 03-09; 03-14; CAM = 2; drift = 0.16 and application efficiency 0.95.
f Application dates 01-01; 03-14; 03-19; CAM = 2; drift = 0.00 and application efficiency 1.00.
g Application dates 07-15; 07-20; 07-25; CAM = 2; drift = 0.00 and application efficiency 1.00.
h Application dates 07-15; 07-20; 07-25; CAM = 2; drift = 0.16 and application efficiency 0.95.
i Application dates 03-04; 03-09; 03-14; CAM = 2; drift = 0.16 and application efficiency 0.95.
j Application dates 03-04; 03-09; 03-14; CAM = 2; drift = 0.00 and application efficiency 1.00.

The highest daily total fenamidone residue concentration in shallow groundwater estimated by PRZM-GW is 207 ug/L (Table 8). PRZM-GW estimates for peak concentration ranged from 41.5 to 207.0 ug/L. The post-breakthrough averages (after equilibrium is established) ranged from 25.1 to 139 ug/L. Average time to breakthrough ranged from 430 days to 1415 days. Date of application had little influence on predicted groundwater EDWCs. 

Table 8. PRZM-GW Estimates of Groundwater EECs [ug/L] 
                                  Groundwater
                                   Scenario
                               Application Rate
                                  #apps/rate 
                             Highest daily value 
                           Post Breakthrough Average
                           Average Breakthrough Time
                                    (days)
                                   Delmarva
                                   3 @ 0.267
                                      185
                                      120
                                      429
                               FL Central Ridge
                                   3 @ 0.267
                                      143
                                     95.5
                                      450
                                   FL Potato
                                   3 @ 0.267
                                      111
                                     71.5
                                      792
                               GA Coastal Plain
                                   3 @ 0.267
                                     41.5
                                     25.1
                                     1415
                               NC Coastal Plain
                                   3 @ 0.267
                                     84.2
                                     59.7
                                     1263
                               WI Central Sands
                                   3 @ 0.267
                                     207 
                                      139
                                      859
The estimated groundwater concentrations from SCI-GROW, which are being presented as a comparison to the PRZM-GW estimates during the first year of PRZM-GW implementation, are the same as the previous drinking water assessment, i.e., total residue concentration of 178 ug/L, as no additional environmental fate data are available and the yearly maximum applications rates have remained the same. The probable reason that the SCI-GROW estimate and the PRZM-GW results are similar is that PRZM-GW includes hydrolysis which is not considered in SCI-GROW.  


Table 9. SCI-GROW Estimated Exposure Concentrations of Total Residues in Drinking Water Drawn from Groundwater (previous DWA[1]) and Current Assessment
                                 Use Scenario
                            Total Application Rate 
                                  (lbs ai/A)
                     Total Residues Concentration (ug/L)
                             Potato (3 foliar)[1]
                                    0.80[1]
                                      178
                      Potato (3 apps) current assessment
                                     0.80
                                      178
1 USEPA, 2007; D332878, D316085, D316083, D339503	



Appendix 1. Metabolite Company Code (ID), Chemical Names, Degradation Process and Study where Degradate was observed and Structures.

Appendix 1. Table 1. Recommended metabolites for inclusion in the DWA for proposed new uses.
Company Code (ID)
Chemical Name 
Degradation Process and Study where observed
RPA-412636
(S)-Methyl-5-phenylimidazolidine-2,4-dione
CAS Reg. No. 27539-12-4
Cleavage of the -N-N- bond of fenamidone and elimination of the methylthio group
Aerobic soil and aerobic water-sediment systems; Field
RPA-412708
(5S)-3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-4H-imidazole-4-one
CAS Reg. No. 332855-82-0
Cleavage of the -N-N- bond of fenamidone. This metabolite may be considered as the immediate precursor to RPA- 412636
Aerobic soil and aerobic water-sediment systems; Hydrolysis (pH 4; 9); Photolysis
RPA-411639
	
(5S)-3,5-5-methyl-2-(methylthio)-3-[(4-nitrophenyl)amino]-5-phenyl-4H-imidazole-4-one

Nitration of the -N-phenyl (anilo) group at the C-4 position .Bridge-intact product
Can form RPA- 412708 by cleavage of the 
-N-N- bond
Aerobic soil and aerobic water-sediment systems;
RPA-413255

(5S)-3,5-5-methyl-2-(methylthio)-3-[(2-nitrophenyl)amino]-5-phenyl-4H-imidazole-4-one

Nitration of the -N-phenyl (anilo) group at the C-2 position . Bridge-intact product. Can form RPA- 412708 by cleavage of the -N-N- bond
Aerobic soil and aerobic water-sediment systems;
RPA-409446
5-Methyl-3-[(4-nitrophenyl)amino-5 -- 2,4-imidazolidinedione
(The code for the S-enantiomer is RPA-221607)
Nitration of the -N-phenyl (anilo) group at C-2 position Bridge-intact product; Elimination of the methylthio group. Can form RPA- 412636 by cleavage of the 
-N-N- bond
Aerobic soil metabolism
RP- 410995
5-Methyl-3-[(2-nitrophenyl)amino-5 -- 2,4-imidazolidinedione
(The code for the S-enantiomer is RPA-221701)
Nitration of the -N-phenyl (anilo) group at C-2 position Bridge-intact product; Elimination of the methylthio group. Can form RPA- 412636 by cleavage of the -N-N- bond
Aerobic soil metabolism

Appendix 1. Table 2. Chemical Structures
Name
                                   Structure
fenamidone; RPA 407213

(5S)-3,5-dihydro-5-methyl-2-(methylthio)-5-phenyl-3-(phenylamino)-4H-imidazol-4-one
                                       

                                       
                           [14]C-N-phenyl-fenamidone
                                       
                          [1][4]C-C-phenyl-fenamidone
RPA 408056 (racemic mixture)
RPA 412708 (S-enantiomer)
{note some documents have ID this as RPA 412108}

5-methyl-2-methylthio-5-phenyl-3,5-dihydroimidazol-4-one
                                       
RPA 405862 (racemic mixture)
RPA 410193 (S enantiomer)

5-methyl-5-phenyl-3-phenylamino-imidazolidin-2,4-dione


                                       
RPA 717879 (racemic mixture)
RPA 412636 (S-enantiomer)

5-methyl-5-phenylimidazolidine-2,4-dione
                                       
RPA 413255

(5S)-5-methyl-2-(methylthio)-3-[(2-nitrophenyl)amino]-5-phenyl-3,5-dihydro-4H-imidazol-4-one

RPA 410914 (racemic mixture)
                                       
RPA 411639

(5S)-5-methyl-2-(methylthio)-3-[(4-nitrophenyl)amino]-5-phenyl-3,5-dihydro-4H-imidazol-4-one

RPA 406012 (racemic mixture)
                                       
RPA 410995

(5S)-5-methyl-3-[(2-nitrophenyl)amino]-5-phenylimidazolidine-2,4-dione
                                       
RPA 409446

(5S)-5-methyl-3-[(4-nitrophenyl)amino]-5-phenylimidazolidine-2,4-dione
                                       
RPA 407213-dimer

(5S,5'S)-3,3'-(1,2-diphenylhydrazine-1,2-diyl)bis[5-methyl-2-(methylthio)-5-phenyl-3,5-dihydro-4H-imidazol-4-one]
                                       
aniline
                                       
























Appendix 2. Modeling Assumptions and Concentrations not adjusted by PCA.

PE5 does not easily allow for mixed application methods (seed treatment with foliar applications) although PRZM does). To qualitatively evaluate the difference, one application of fenamidone as a potato seed (chemical application method (CAM) = 8, incorporation depth = 2 cm, drift = 0.0, efficiency = 100%) and one foliar application as an aerial spray (CAM = 2, drift = 0.16 an application efficiency = 95%) were run for each potato scenario (Appendix 2 Table 1). CAM = 8 allows for the placement (incorporation) of the pesticide (i.e., seed potato) at a specified depth.  When CAM =8, incorporation depths greater than 4 cm results in EDWCs of 0.0 concentration.  As expected the concentrations from the seed treatments (0.84 and 0.77 ug/L) are less than the singular foliar application (11.78 and 11.57 ug/L). To considered the different application dates associated with the different methods of application (seed treatment vs foliar) combinations of different application dates were also considered (Appendix 2 Table 1).    

PRZM/EXAMs total fenamidone concentrations not adjusted by the PCA are given in Appendix 2 Table 1.


Appendix 2 Table 1. PRZM/EXAMS Surface Water EECs [ug/L](without PCA)
                                     Crop
                                   Scenario
                            #apps/rate (lb a.i./A)
                                 1-in-10 year
                                   Long-term
                                       
                                       
                                       
                                     Peak
                                    Average
                                30-year Average
       Comparison of Potato Seed Treatment vs Single Foliar Application
                          Potato (seed treatment)[a]
                                   FL Potato
                                   1 @ 0.267
                                                                           0.84
                                     0.12
                                     0.03
                              Potato (foliar)[b]
                                   FL Potato
                                   1 @ 0.267
                                                                          11.78
                                     1.79
                                     0.94
                          Potato (seed treatment)[a1]
	ME Potato
                                   1 @ 0.267
                                                                           0.77
                                     0.19
                                     0.08
                         Potato (seed treatment)[a][2]
                                  ME Potato 
                                   1 @ 0.267
                                                                           0.62
                                     0.16
                                     0.05
                             Potato (foliar)[b][1]
                                   ME Potato
                                   1 @ 0.267
                                                                          11.57
                                     3.19
                                     1.63
                              Potato (foliar)[b2]
                                   ME Potato
                                   1 @ 0.267
                                     10.90
                                     2.95
                                     1.38
                                                                               
                              Potato (foliar)[c] 
                                   FL Potato
                                   3 @ 0.267
                                                                          34.04
                                                                           5.78
                                                                           3.06
                              Potato (foliar)[d]
                                   FL Potato
                                   3 @ 0.267
                                                                          30.43
                                                                           5.65
                                                                           3.07
                              Potato (foliar)[e]
                                   FL Potato
                                   3 @ 0.267
                                                                          39.90
                                                                           5.89
                                                                           2.99
                          Potato (foliar no drift)[f]
                                   FL Potato
                                   3 @ 0.267
                                                                          38.88
                                                                           5.46
                                                                           2.41
                          Potato (foliar no drift)[g]
                                   ME Potato
                                   3 @ 0.267
                                                                          18.16
                                                                           6.37
                                                                           2.55
                              Potato (foliar)[h]
                                   ME Potato
                                   3 @ 0.267
                                                                          21.81
                                                                           7.62
                                                                           1.98
                              Potato (foliar)[i]
                                   FL Potato
                                   3 @ 0.267
                                                                          47.06
                                                                           6.52
                                                                           2.51
                          Potato (foliar no drift)[j]
                                   FL Potato
                                   3 @ 0.267
                                                                          48.46
                                                                           6.89
                                                                           3.08
                       Three Aerial Foliar Applications
                           Onions (Bulb Vegetables)
                                   CA Onion
                                  4 @ 0.178 
                                                                           7.53
                                                                           2.98
                                                                           2.19
                                      "
                                   GA Onion
                                  4 @ 0.178 
                                                                          28.79
                                                                           4.48
                                                                           2.18
                                      "
                                   WA Onion
                                  4 @ 0.178 
                                                                          10.57
                                                                           5.00
                                                                           3.22
                               Beans (Succulent)
                                    MI Bean
                                   3 @ 0.267
                                                                          54.05
                                                                          14.24
                                                                           9.02
                                      "
                                 OR Snap bean
                                   3 @ 0.267
                                                                          25.71
                                                                           5.75
                                                                           2.69
                                    Ginseng
                                 MN Sugarbeet
                                   3 @ 0.267
                                                                          34.32
                                                                          11.76
                                                                           7.94
                                      "
                                 MI Asparagus
                                   3 @ 0.267
                                                                          10.77
                                                                           5.43
                                                                           3.82
a Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[b] Applied via CAM = 2; drift =0.16 and application efficiency = 0.95
[a1] Application Date: 07-15; Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[a2] Application Date: 04-25; Treated potato seed applied via CAM = 8, 2 cm depth of incorporation; no drift and application efficiency = 1.0.
[b1] Application Date: 07-15; Treated potato seed applied via CAM = 2, 2 cm depth of incorporation; drift=0.16 and application efficiency = 0.95.
[b2] Application Date: 04-25; Treated potato seed applied via CAM = 2, 2 cm depth of incorporation; drift=0.16 and application efficiency = 0.95.
[c] Application dates 01-01; 01-06; 01-11; CAM = 2; drift = 0.16 and application efficiency 0.95.
[d] Application dates 01-01; 03-04; 03-09; CAM = 2; drift = 0.16 and application efficiency 0.95.
[e] Application dates 01-01; 03-09; 03-14; CAM = 2; drift = 0.16 and application efficiency 0.95.
f Application dates 01-01; 03-14; 03-19; CAM = 2; drift = 0.00 and application efficiency 1.00.
g Application dates 07-15; 07-20; 07-25; CAM = 2; drift = 0.00 and application efficiency 1.00
h Application dates 07-15; 07-20; 07-25; CAM = 2; drift = 0.16 and application efficiency 0.95.
i Application dates 03-04; 03-09; 03-14; CAM = 2; drift = 0.16 and application efficiency 0.95.
j Application dates 03-04; 03-09; 03-14; CAM = 2; drift = 0.00 and application efficiency 1.00.



Appendix 3.  Representative Model Outputs for PRZM/EXAMS (PE5), PRZM-GW, and SCI-GROW.



stored as MIbean.out
Chemical: fenamidone
PRZM environment: MIbeansSTD.txt	modified Tueday, 29 May 2007 at 13:56:44
EXAMS environment: ir298.exv	modified Tueday, 26 August 2008 at 06:14:08
Metfile: w14826.dvf	modified Tueday, 26 August 2008 at 06:15:04
Water segment concentrations (ppb)

Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
1961	54.22	53.04	50.01	41.98	37.01	11.78
1962	16.68	16.43	15.42	13.41	12.11	6.878
1963	18.74	18.34	17.34	15.05	13.41	5.319
1964	14.26	13.97	13	11.67	10.66	5.283
1965	52.47	51.33	46.88	39.07	34.47	12.55
1966	15.19	14.96	14.05	12.22	11.01	8.032
1967	22.03	21.56	19.79	17.25	15.57	6.682
1968	134	131	120	99.04	87.18	29.88
1969	38.12	37.55	35.25	30.67	27.7	14.32
1970	30.33	29.66	27.31	23.98	21.51	8.795
1971	10.21	10.05	9.437	8.211	7.623	5.639
1972	17.98	17.59	16.15	13.79	12.27	5.358
1973	30.43	29.8	27.68	23.41	20.82	8.36
1974	12.28	12.09	11.35	9.862	9.273	6.706
1975	101	98.76	91.66	76.89	67.83	22.59
1976	30.78	30.31	28.46	24.75	22.3	13.52
1977	11.39	11.17	10.34	8.799	8.476	5.319
1978	12.57	12.37	11.55	10.55	9.857	4.762
1979	10.5	10.27	9.388	8.108	7.376	3.942
1980	12.52	12.24	11.42	10.21	9.256	4.038
1981	16.48	16.16	15.02	13.05	11.74	5.243
1982	20.57	20.12	18.45	16.14	14.41	6.403
1983	16.11	15.74	14.49	13.36	12.25	6.084
1984	15.94	15.58	14.67	13.08	12.04	5.719
1985	47.53	46.5	43.44	36.54	32.31	11.79
1986	38.69	37.86	35.49	30.73	27.35	13.24
1987	21.76	21.28	20.16	17.44	15.69	9.06
1988	28.1	27.45	25.46	21.48	19.1	8.353
1989	20.4	19.96	19.1	16.59	14.92	7.405
1990	24.77	24.22	22.26	19.24	17.09	7.406

Sorted results
Prob.	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
0.032258064516129	134	131	120	99.04	87.18	29.88
0.0645161290322581	101	98.76	91.66	76.89	67.83	22.59
0.0967741935483871	54.22	53.04	50.01	41.98	37.01	14.32
0.129032258064516	52.47	51.33	46.88	39.07	34.47	13.52
0.161290322580645	47.53	46.5	43.44	36.54	32.31	13.24
0.193548387096774	38.69	37.86	35.49	30.73	27.7	12.55
0.225806451612903	38.12	37.55	35.25	30.67	27.35	11.79
0.258064516129032	30.78	30.31	28.46	24.75	22.3	11.78
0.290322580645161	30.43	29.8	27.68	23.98	21.51	9.06
0.32258064516129	30.33	29.66	27.31	23.41	20.82	8.795
0.354838709677419	28.1	27.45	25.46	21.48	19.1	8.36
0.387096774193548	24.77	24.22	22.26	19.24	17.09	8.353
0.419354838709677	22.03	21.56	20.16	17.44	15.69	8.032
0.451612903225806	21.76	21.28	19.79	17.25	15.57	7.406
0.483870967741936	20.57	20.12	19.1	16.59	14.92	7.405
0.516129032258065	20.4	19.96	18.45	16.14	14.41	6.878
0.548387096774194	18.74	18.34	17.34	15.05	13.41	6.706
0.580645161290323	17.98	17.59	16.15	13.79	12.27	6.682
0.612903225806452	16.68	16.43	15.42	13.41	12.25	6.403
0.645161290322581	16.48	16.16	15.02	13.36	12.11	6.084
0.67741935483871	16.11	15.74	14.67	13.08	12.04	5.719
0.709677419354839	15.94	15.58	14.49	13.05	11.74	5.639
0.741935483870968	15.19	14.96	14.05	12.22	11.01	5.358
0.774193548387097	14.26	13.97	13	11.67	10.66	5.319
0.806451612903226	12.57	12.37	11.55	10.55	9.857	5.319
0.838709677419355	12.52	12.24	11.42	10.21	9.273	5.283
0.870967741935484	12.28	12.09	11.35	9.862	9.256	5.243
0.903225806451613	11.39	11.17	10.34	8.799	8.476	4.762
0.935483870967742	10.5	10.27	9.437	8.211	7.623	4.038
0.967741935483871	10.21	10.05	9.388	8.108	7.376	3.942

0.1	54.045	52.869	49.697	41.689	36.756	14.24
					Average of yearly averages:	9.0152

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:
Output File: MIbean
Metfile:	w14826.dvf
PRZM scenario:	MIbeansSTD.txt
EXAMS environment file:	ir298.exv
Chemical Name:	fenamidone
Description	Variable Name	Value	Units	Comments
Molecular weight	mwt	311.4	g/mol
Henry's Law Const.	henry	1.37e-10	atm-m^3/mol
Vapor Pressure	vapr	2.6e-9	torr
Solubility	sol	7.8	mg/L
Kd	Kd		mg/L
Koc	Koc	26	mg/L
Photolysis half-life	kdp	5.4	days	Half-life
Aerobic Aquatic Metabolism	kbacw	137.78	days	Halfife
Anaerobic Aquatic Metabolism	kbacs	1386.29	days	Halfife
Aerobic Soil Metabolism	asm	0	days	Halfife
Hydrolysis:	pH 7	407	days	Half-life
Method:	CAM	2	integer	See PRZM manual
Incorporation Depth:	DEPI		cm
Application Rate:	TAPP	0.299	kg/ha
Application Efficiency:	APPEFF	0.95	fraction
Spray Drift	DRFT	0.16	fraction of application rate applied to pond
Application Date	Date	1-8	dd/mm or dd/mmm or dd-mm or dd-mmm
Interval 1	interval	5	days	Set to 0 or delete line for single app.
app. rate 1	apprate	0.299	kg/ha
Interval 2	interval	5	days	Set to 0 or delete line for single app.
app. rate 2	apprate	0.299	kg/ha
Record 17:	FILTRA	
	IPSCND	1
	UPTKF	
Record 18:	PLVKRT	
	PLDKRT	
	FEXTRC	0.5
Flag for Index Res. Run	IR	Reservoir
Flag for runoff calc.	RUNOFF	total	none, monthly or total(average of entire run)




SEED TREATMENT CAM = 8, depth placement 3 cm
stored as FLpotatoST3.out
Chemical: fenamidone
PRZM environment: FLpotatoNMC.txt	modified Thuday, 14 June 2007 at 11:15:58
EXAMS environment: ir298.exv	modified Tueday, 26 August 2008 at 06:14:08
Metfile: w13889.dvf	modified Tueday, 26 August 2008 at 06:14:40
Water segment concentrations (ppb)

Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
1961	0	0	0	0	0	0
1962	0	0	0	0	0	0
1963	0	0	0	0	0	0
1964	0	0	0	0	0	0
1965	0	0	0	0	0	0
1966	0	0	0	0	0	0
1967	0	0	0	0	0	0
1968	0	0	0	0	0	0
1969	0	0	0	0	0	0
1970	0	0	0	0	0	0
1971	0	0	0	0	0	0
1972	0	0	0	0	0	0
1973	0	0	0	0	0	0
1974	0	0	0	0	0	0
1975	0	0	0	0	0	0
1976	0	0	0	0	0	0
1977	0	0	0	0	0	0
1978	0	0	0	0	0	0
1979	0	0	0	0	0	0
1980	0	0	0	0	0	0
1981	0	0	0	0	0	0
1982	0	0	0	0	0	0
1983	0	0	0	0	0	0
1984	0	0	0	0	0	0
1985	0	0	0	0	0	0
1986	0	0	0	0	0	0
1987	0	0	0	0	0	0
1988	0	0	0	0	0	0
1989	0	0	0	0	0	0
1990	0	0	0	0	0	0

Sorted results
Prob.	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
0.032258064516129	0	0	0	0	0	0
0.0645161290322581	0	0	0	0	0	0
0.0967741935483871	0	0	0	0	0	0
0.129032258064516	0	0	0	0	0	0
0.161290322580645	0	0	0	0	0	0
0.193548387096774	0	0	0	0	0	0
0.225806451612903	0	0	0	0	0	0
0.258064516129032	0	0	0	0	0	0
0.290322580645161	0	0	0	0	0	0
0.32258064516129	0	0	0	0	0	0
0.354838709677419	0	0	0	0	0	0
0.387096774193548	0	0	0	0	0	0
0.419354838709677	0	0	0	0	0	0
0.451612903225806	0	0	0	0	0	0
0.483870967741936	0	0	0	0	0	0
0.516129032258065	0	0	0	0	0	0
0.548387096774194	0	0	0	0	0	0
0.580645161290323	0	0	0	0	0	0
0.612903225806452	0	0	0	0	0	0
0.645161290322581	0	0	0	0	0	0
0.67741935483871	0	0	0	0	0	0
0.709677419354839	0	0	0	0	0	0
0.741935483870968	0	0	0	0	0	0
0.774193548387097	0	0	0	0	0	0
0.806451612903226	0	0	0	0	0	0
0.838709677419355	0	0	0	0	0	0
0.870967741935484	0	0	0	0	0	0
0.903225806451613	0	0	0	0	0	0
0.935483870967742	0	0	0	0	0	0
0.967741935483871	0	0	0	0	0	0

0.1	0	0	0	0	0	0
					Average of yearly averages:	0

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:
Output File: FLpotatoST3
Metfile:	w13889.dvf
PRZM scenario:	FLpotatoNMC.txt
EXAMS environment file:	ir298.exv
Chemical Name:	fenamidone
Description	Variable Name	Value	Units	Comments
Molecular weight	mwt	311.4	g/mol
Henry's Law Const.	henry	1.37e-10	atm-m^3/mol
Vapor Pressure	vapr	2.6e-9	torr
Solubility	sol	7.8	mg/L
Kd	Kd		mg/L
Koc	Koc	26	mg/L
Photolysis half-life	kdp	5.4	days	Half-life
Aerobic Aquatic Metabolism	kbacw	137.78	days	Halfife
Anaerobic Aquatic Metabolism	kbacs	1386.29	days	Halfife
Aerobic Soil Metabolism	asm	0	days	Halfife
Hydrolysis:	pH 7	407	days	Half-life
Method:	CAM	8	integer	See PRZM manual
Incorporation Depth:	DEPI	3	cm
Application Rate:	TAPP	0.299	kg/ha
Application Efficiency:	APPEFF	1.0	fraction
Spray Drift	DRFT	0	fraction of application rate applied to pond
Application Date	Date	1-1	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	Reservoir
Flag for runoff calc.	RUNOFF	total	none, monthly or total(average of entire run)














SEED TREATMENT, CAM = 8, Incorporation depth = 2 cm
stored as FLpotatoST.out
Chemical: fenamidone
PRZM environment: FLpotatoNMC.txt	modified Thuday, 14 June 2007 at 11:15:58
EXAMS environment: ir298.exv	modified Tueday, 26 August 2008 at 06:14:08
Metfile: w13889.dvf	modified Tueday, 26 August 2008 at 06:14:40
Water segment concentrations (ppb)

Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
1961	0.0192	0.01858	0.01592	0.01141	0.00908	0.002663
1962	0.1225	0.1179	0.1047	0.07567	0.06046	0.01779
1963	0.253	0.2446	0.2094	0.1552	0.126	0.03748
1964	0.1479	0.1433	0.1238	0.08952	0.07167	0.02113
1965	0.0192	0.01847	0.01622	0.0117	0.009315	0.00273
1966	0.003978	0.003871	0.003437	0.002708	0.002261	0.0006923
1967	0.1476	0.1434	0.1232	0.08876	0.07092	0.02084
1968	0.03033	0.0292	0.02496	0.01916	0.01574	0.004725
1969	0.1542	0.1484	0.1267	0.09189	0.07395	0.02191
1970	0.06951	0.06694	0.05741	0.04354	0.03516	0.01044
1971	0.2233	0.2153	0.1847	0.1329	0.1066	0.0316
1972	0.1867	0.1794	0.1567	0.1145	0.09169	0.02701
1973	0.1319	0.1269	0.1085	0.07828	0.06253	0.01851
1974	0.007785	0.007488	0.006387	0.004702	0.003836	0.001158
1975	0.04413	0.04243	0.03755	0.02717	0.02171	0.006398
1976	0.5496	0.5292	0.4535	0.3286	0.2624	0.07726
1977	0.3145	0.3031	0.2606	0.1893	0.1517	0.04495
1978	0.2102	0.2025	0.1845	0.1377	0.1109	0.03291
1979	1.021	0.9836	0.8691	0.6409	0.515	0.1527
1980	0.002787	0.002696	0.002483	0.001919	0.001631	0.0005435
1981	0.02415	0.02325	0.01992	0.01599	0.01331	0.004039
1982	0.1021	0.09822	0.08463	0.06093	0.05005	0.0151
1983	1.044	1.006	0.8832	0.6452	0.5181	0.1542
1984	0.008113	0.007853	0.006936	0.005131	0.004142	0.001315
1985	0.08296	0.07992	0.07129	0.05249	0.04194	0.01228
1986	0.1387	0.1343	0.1178	0.08517	0.06811	0.02011
1987	0.1826	0.1779	0.1529	0.1105	0.08855	0.02645
1988	0.8708	0.8402	0.7212	0.5219	0.418	0.1233
1989	0.02258	0.02172	0.01852	0.01544	0.01271	0.003869
1990	0.003979	0.003826	0.003259	0.002336	0.001862	0.0005491

Sorted results
Prob.	Peak	96 hr	21 Day	60 Day	90 Day	Yearly
0.032258064516129	1.044	1.006	0.8832	0.6452	0.5181	0.1542
0.0645161290322581	1.021	0.9836	0.8691	0.6409	0.515	0.1527
0.0967741935483871	0.8708	0.8402	0.7212	0.5219	0.418	0.1233
0.129032258064516	0.5496	0.5292	0.4535	0.3286	0.2624	0.07726
0.161290322580645	0.3145	0.3031	0.2606	0.1893	0.1517	0.04495
0.193548387096774	0.253	0.2446	0.2094	0.1552	0.126	0.03748
0.225806451612903	0.2233	0.2153	0.1847	0.1377	0.1109	0.03291
0.258064516129032	0.2102	0.2025	0.1845	0.1329	0.1066	0.0316
0.290322580645161	0.1867	0.1794	0.1567	0.1145	0.09169	0.02701
0.32258064516129	0.1826	0.1779	0.1529	0.1105	0.08855	0.02645
0.354838709677419	0.1542	0.1484	0.1267	0.09189	0.07395	0.02191
0.387096774193548	0.1479	0.1434	0.1238	0.08952	0.07167	0.02113
0.419354838709677	0.1476	0.1433	0.1232	0.08876	0.07092	0.02084
0.451612903225806	0.1387	0.1343	0.1178	0.08517	0.06811	0.02011
0.483870967741936	0.1319	0.1269	0.1085	0.07828	0.06253	0.01851
0.516129032258065	0.1225	0.1179	0.1047	0.07567	0.06046	0.01779
0.548387096774194	0.1021	0.09822	0.08463	0.06093	0.05005	0.0151
0.580645161290323	0.08296	0.07992	0.07129	0.05249	0.04194	0.01228
0.612903225806452	0.06951	0.06694	0.05741	0.04354	0.03516	0.01044
0.645161290322581	0.04413	0.04243	0.03755	0.02717	0.02171	0.006398
0.67741935483871	0.03033	0.0292	0.02496	0.01916	0.01574	0.004725
0.709677419354839	0.02415	0.02325	0.01992	0.01599	0.01331	0.004039
0.741935483870968	0.02258	0.02172	0.01852	0.01544	0.01271	0.003869
0.774193548387097	0.0192	0.01858	0.01622	0.0117	0.009315	0.00273
0.806451612903226	0.0192	0.01847	0.01592	0.01141	0.00908	0.002663
0.838709677419355	0.008113	0.007853	0.006936	0.005131	0.004142	0.001315
0.870967741935484	0.007785	0.007488	0.006387	0.004702	0.003836	0.001158
0.903225806451613	0.003979	0.003871	0.003437	0.002708	0.002261	0.0006923
0.935483870967742	0.003978	0.003826	0.003259	0.002336	0.001862	0.0005491
0.967741935483871	0.002787	0.002696	0.002483	0.001919	0.001631	0.0005435

0.1	0.83868	0.8091	0.69443	0.50257	0.40244	0.118696
					Average of yearly averages:	0.02982173

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:
Output File: FLpotatoST
Metfile:	w13889.dvf
PRZM scenario:	FLpotatoNMC.txt
EXAMS environment file:	ir298.exv
Chemical Name:	fenamidone
Description	Variable Name	Value	Units	Comments
Molecular weight	mwt	311.4	g/mol
Henry's Law Const.	henry	1.37e-10	atm-m^3/mol
Vapor Pressure	vapr	2.6e-9	torr
Solubility	sol	7.8	mg/L
Kd	Kd		mg/L
Koc	Koc	26	mg/L
Photolysis half-life	kdp	5.4	days	Half-life
Aerobic Aquatic Metabolism	kbacw	137.78	days	Halfife
Anaerobic Aquatic Metabolism	kbacs	1386.29	days	Halfife
Aerobic Soil Metabolism	asm	0	days	Halfife
Hydrolysis:	pH 7	407	days	Half-life
Method:	CAM	8	integer	See PRZM manual
Incorporation Depth:	DEPI	2	cm
Application Rate:	TAPP	0.299	kg/ha
Application Efficiency:	APPEFF	1.0	fraction
Spray Drift	DRFT	0	fraction of application rate applied to pond
Application Date	Date	1-1	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	Reservoir
Flag for runoff calc.	RUNOFF	total	none, monthly or total(average of entire run)
PRZM-GW OUTPUT
Wisconsin Central Sands

      
      Fenamidone (Total Toxic Residues)
      Outputs 
      Highest Dailey Value (ug/L) = 207 
      Simulation Average (ug/L) = 125
      Post-Breakthrough Average (ug/L) = 139
      Average Breakthrough Time = 958.93 days
      Throughputs 12.76
      Inputs
      Hydrolysis = 407 days
      Koc = 26 mL/goc
      Aerobic Soil Metabolism = 0 (stable)
      3 applications @ 0.267 lb a.i./A (0.299 kg a.i./ha)




PRZM-GW INPUT

7/10/2013 12:16:57 PM; Enter chemical name or descriptive information.; Wisconsin Corn - WI Central Sands
User Interface Version: PRZM-GW (Version 1.01)
***Record 3 
    0.76    0.36       0      18       1       1
***Record 6
       0
***Record 8
       1
***Record 9
       1    0.25      90     100       1  10  10  10       0     100
***Record 10
      30
***Record 11
  010561  210761  201061       1
  010562  210762  201062       1
  010563  210763  201063       1
  010564  210764  201064       1
  010565  210765  201065       1
  010566  210766  201066       1
  010567  210767  201067       1
  010568  210768  201068       1
  010569  210769  201069       1
  010570  210770  201070       1
  010571  210771  201071       1
  010572  210772  201072       1
  010573  210773  201073       1
  010574  210774  201074       1
  010575  210775  201075       1
  010576  210776  201076       1
  010577  210777  201077       1
  010578  210778  201078       1
  010579  210779  201079       1
  010580  210780  201080       1
  010581  210781  201081       1
  010582  210782  201082       1
  010583  210783  201083       1
  010584  210784  201084       1
  010585  210785  201085       1
  010586  210786  201086       1
  010587  210787  201087       1
  010588  210788  201088       1
  010589  210789  201089       1
  010590  210790  201090       1
***Record 12
Place Holder
***Record 13
      90       1       0       0
***Record 15
Place Holder
***Record 16
   1 561  0 1    4 0.299    1    0
  31 561  0 2    4 0.299    1    0
   5 661  0 2    4 0.299    1    0
   1 562  0 1    4 0.299    1    0
  31 562  0 2    4 0.299    1    0
   5 662  0 2    4 0.299    1    0
   1 563  0 1    4 0.299    1    0
  31 563  0 2    4 0.299    1    0
   5 663  0 2    4 0.299    1    0
   1 564  0 1    4 0.299    1    0
  31 564  0 2    4 0.299    1    0
   5 664  0 2    4 0.299    1    0
   1 565  0 1    4 0.299    1    0
  31 565  0 2    4 0.299    1    0
   5 665  0 2    4 0.299    1    0
   1 566  0 1    4 0.299    1    0
  31 566  0 2    4 0.299    1    0
   5 666  0 2    4 0.299    1    0
   1 567  0 1    4 0.299    1    0
  31 567  0 2    4 0.299    1    0
   5 667  0 2    4 0.299    1    0
   1 568  0 1    4 0.299    1    0
  31 568  0 2    4 0.299    1    0
   5 668  0 2    4 0.299    1    0
   1 569  0 1    4 0.299    1    0
  31 569  0 2    4 0.299    1    0
   5 669  0 2    4 0.299    1    0
   1 570  0 1    4 0.299    1    0
  31 570  0 2    4 0.299    1    0
   5 670  0 2    4 0.299    1    0
   1 571  0 1    4 0.299    1    0
  31 571  0 2    4 0.299    1    0
   5 671  0 2    4 0.299    1    0
   1 572  0 1    4 0.299    1    0
  31 572  0 2    4 0.299    1    0
   5 672  0 2    4 0.299    1    0
   1 573  0 1    4 0.299    1    0
  31 573  0 2    4 0.299    1    0
   5 673  0 2    4 0.299    1    0
   1 574  0 1    4 0.299    1    0
  31 574  0 2    4 0.299    1    0
   5 674  0 2    4 0.299    1    0
   1 575  0 1    4 0.299    1    0
  31 575  0 2    4 0.299    1    0
   5 675  0 2    4 0.299    1    0
   1 576  0 1    4 0.299    1    0
  31 576  0 2    4 0.299    1    0
   5 676  0 2    4 0.299    1    0
   1 577  0 1    4 0.299    1    0
  31 577  0 2    4 0.299    1    0
   5 677  0 2    4 0.299    1    0
   1 578  0 1    4 0.299    1    0
  31 578  0 2    4 0.299    1    0
   5 678  0 2    4 0.299    1    0
   1 579  0 1    4 0.299    1    0
  31 579  0 2    4 0.299    1    0
   5 679  0 2    4 0.299    1    0
   1 580  0 1    4 0.299    1    0
  31 580  0 2    4 0.299    1    0
   5 680  0 2    4 0.299    1    0
   1 581  0 1    4 0.299    1    0
  31 581  0 2    4 0.299    1    0
   5 681  0 2    4 0.299    1    0
   1 582  0 1    4 0.299    1    0
  31 582  0 2    4 0.299    1    0
   5 682  0 2    4 0.299    1    0
   1 583  0 1    4 0.299    1    0
  31 583  0 2    4 0.299    1    0
   5 683  0 2    4 0.299    1    0
   1 584  0 1    4 0.299    1    0
  31 584  0 2    4 0.299    1    0
   5 684  0 2    4 0.299    1    0
   1 585  0 1    4 0.299    1    0
  31 585  0 2    4 0.299    1    0
   5 685  0 2    4 0.299    1    0
   1 586  0 1    4 0.299    1    0
  31 586  0 2    4 0.299    1    0
   5 686  0 2    4 0.299    1    0
   1 587  0 1    4 0.299    1    0
  31 587  0 2    4 0.299    1    0
   5 687  0 2    4 0.299    1    0
   1 588  0 1    4 0.299    1    0
  31 588  0 2    4 0.299    1    0
   5 688  0 2    4 0.299    1    0
   1 589  0 1    4 0.299    1    0
  31 589  0 2    4 0.299    1    0
   5 689  0 2    4 0.299    1    0
   1 590  0 1    4 0.299    1    0
  31 590  0 2    4 0.299    1    0
   5 690  0 2    4 0.299    1    0
***Record 17
       0       1       0
***Record 18
       0       0     0.5
***Record 19
Place Holder
***Record 20
    1000           0   0   0   0   0   2   1   1   0
***Record 26
       0       0       0
***Record 27
       3     0.1     0.7     4.0
***Record 31
  0.2  0.2  0.2  0.2  0.2  0.2  0.2  0.2  0.2  0.2  0.2  0.2 0.97 10.0
***Record 32
  5.6  5.6  5.6  5.6  5.6  5.6  5.6  5.6  5.6  5.6  5.6  5.6
***Record 32A
    2.00    25.0
***Record 33
       8
*** Record 34,36,37 Horizon 1
       1      10    1.63   0.088       0       0       0
          0.0017       0       0
               1   0.088   0.034    0.46  0.1196
             5.6      95     2.3       0       0
*** Record 34,36,37 Horizon 2
       2      10    1.63   0.088       0       0       0
          0.0017       0       0
               5   0.088   0.034    0.46  0.1196
             5.6      95     2.3       0       0
*** Record 34,36,37 Horizon 3
       3      20    1.68   0.079       0       0       0
          0.0017       0       0
              20   0.079   0.025    0.14  0.0364
             5.6      96     2.5       0       0
*** Record 34,36,37 Horizon 4
       4      20    1.68   0.079       0       0       0
          0.0017       0       0
              20   0.079   0.025    0.09  0.0234
             5.6      96     2.5       0       0
*** Record 34,36,37 Horizon 5
       5      20    1.59   0.068       0       0       0
          0.0017       0       0
              20   0.068   0.016    0.09  0.0234
             5.6      97     1.7       0       0
*** Record 34,36,37 Horizon 6
       6      20    1.59   0.068       0       0       0
          0.0017       0       0
              20   0.068   0.016    0.08  0.0208
             5.6      97     1.7       0       0
*** Record 34,36,37 Horizon 7
       7     800    1.59   0.068       0       0       0
          0.0017       0       0
              50   0.068   0.016    0.07  0.0182
             5.6      97     1.7       0       0
*** Record 34,36,37 Horizon 8
       8     100    1.59   0.396       0       0       0
          0.0017       0       0
              50   0.396   0.001    0.07  0.0182
             5.6      97     1.7       0       0
*** Record 40
       0
*** Record 42
            YEAR      10            YEAR      10            YEAR      10   0
*** Record 45
       3    YEAR
*** Record 46
    DCON1   TAVE  33  34  1.0E3
    INFL    TCUM  33  33  0.0109
    IRRG    TSER





    				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:fenamidone
 time is  4/ 2/2013  15:13:37
 ------------------------------------------------------------------------
  Application      Number of       Total Use    Koc      Soil Aerobic
  rate (lb/acre)  applications   (lb/acre/yr)  (ml/g)   metabolism (days)
 ------------------------------------------------------------------------
      0.801           1.0           0.801      2.60E+01     1000.0
 ------------------------------------------------------------------------
 groundwater screening cond (ppb) =   1.78E+02 
 ************************************************************************

