Document ID: EPA-HQ-OPP-2007-0114-0007
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2007-12-28T05:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D. C.  20460

		

	OFFICE OF

PREVENTION, PESTICIDES

AND TOXIC SUBSTANCES

September 26, 2007

									PC Code: 128968

									DP Barcode: 336179

MEMORANDUM

SUBJECT: 	Drinking Water Assessment for Fluroxypyr New Uses on Pome
Fruit and Millet

FROM: 	Jonathan Angier, Ph.D.

		Environmental Risk Branch 2

		Environmental Fate and Effects Division (7507C)	

		

TO:		Daniel Rosenblatt, Chief

		Room 05

		Registration Division (7505C)

THRU:	Dana Spatz, Acting Branch Chief		

		Environmental Risk Branch 2

		Environmental Fate and Effects Division (7507C)	

This memorandum evaluates the impact of new uses for Fluroxypyr
(marketed as STARANE®) on drinking water resources, based upon proposed
application rates.  The new uses include: Pome Fruit (including, but not
limited to: Apple, Pear, Asian Pear, Quince, Crabapple, Loquat, and
Mayhaw), Millet, Proso Millet, and Pearl Millet.

Results from this evaluation can be compared with previous Drinking
Water Assessments (DWA) for other uses – including new use for Onion
(5/30/06, DP Barcode #314020) and use for Rangeland and Permanent Grass
Pasture (8/13/03, DP Barcode #292471).  Thus far, the highest modeled
Environmental Exposure Concentrations (EECs) for surface water drinking
water result from uses on rangeland, with a peak EEC value of 32.9 ppb,
annual mean value of 3.28 ppb, and a 36-year overall mean of 1.76 ppb.

This assessment utilizes known physical/chemical characteristics of
fluroxypyr-MHE (the applied chemical) and the degradate fluroxypyr acid
(the active ingredient).  The OPP/EFED Tier 2 surface water model
PRZM-EXAMS was used in this assessment.  Percent Cropped Area (PCA)
corrections of 87% were applied for these crops.  A screening assessment
for the impact of fluroxypyr on potential groundwater drinking water
sources, using the Tier 1 groundwater model SciGrow, has also been
conducted.  Results and conclusions are contained herein.  

STARANE® (Fluroxypyr-MHE) is an herbicide intended for postemergent
selective control of broadleaf weeds.  It is currently registered for
use on wheat, barley, oats, corn, sorghum, fallow cropland, non-cropland
(i.e., rangeland), and others.  This Drinking Water Assessment regards
the proposed new uses on pome fruit and millet.

Fluroxypyr-MHE is formulated as an emulsifiable concentrate that is
mixed with water and applied as ground or aerial spray.  It may be
applied as broadcast or banded, or even as spot treatment by hand
application.  STARANE® can be used for pre-plant or post-emergent
broadleaf weed suppression. 

The proposed new uses for Fluroxypyr-MHE are: Pome Fruit, Group 11;
Millet; Proso Millet; and Pearl Millet.  The proposed new use label for
Pome Fruit includes potentially higher maximum rates for this use
(specifically, application rates for “Weeds Suppressed”) than for
most already approved uses.  The proposed new use label states: “Do
not apply more than 2 2/3 pints per acre (0.5 lb ai/acre) per year.” 
This assessment reflects a high-exposure scenario by assuming the
maximum application amount of 0.5 lb ai/A is used per year.

Once fluroxypyr MHE is applied to the environment, it is expected to
degrade to its herbicidal active ingredient, fluroxypyr acid.  The fate
of fluroxypyr-MHE in the environment is complicated by uncertainty in
the formation rate and distribution of the initial degradate fluroxypyr
acid (active ingredient in STARANE® fluroxypyr-MHE) following spray
application.  Fluroxypyr-MHE application rates are established based
upon acid equivalents (ae) pursuant to fluroxypyr acid as the active
ingredient (ai).  However, the solubility of fluroxypyr-MHE is much
lower (~0.1 mg/L) than fluroxypyr acid (~8,000 mg/L); according to
mixing/application instructions, the tank must be agitated before and
during applications to allow undissolved material to remain in
suspension.  In neutral or low pH aqueous conditions, fluroxypyr-MHE is
sufficiently stable such that spray distributed on a target zone will
initially contain mostly the fluroxypyr-MHE form.  Under field
conditions it is likely that most of the MHE will convert to the active
ingredient (fluroxypyr acid) in the course of several days or weeks.  In
the EFED models, it is assumed that the initial spray contains all the
active ingredient, and that degradation rates for the ai commence
immediately after spraying.  However, there may be initial on-site
exposure to the MHE after spraying, with degradation occurring first
from the MHE to acid form, then to other (less-toxic) forms.  Actual
exposure could then potentially be longer than assessed.  Conversely,
this effect may also attenuate the impact of the active ingredient, as
it will be introduced onto the site more gradually (according to
degradation rates).  In high-pH conditions, though, degradation of both
MHE and acid forms are expected to occur more rapidly.  For the purpose
of EFED assessments, the most conservative fate and effects input
parameters are used where available; in this instance, it is more
conservative to use the values for fluroxypyr acid.  Furthermore, in the
case of potential drinking water exposure, fate parameters for
fluroxypyr acid were selected also because this compound is both more
soluble in water and more likely to be transported in an aquatic medium.

Values for the fluroxypyr acid form were used where possible, as this is
the active ingredient degradation product for which these uses are
intended.  Regardless, modeling acid-only versus MHE-only forms yielded
insignificant differences in predicted Environmental Exposure
Concentrations (EECs) for EFED baseline-assessment models (PRZM-EXAMS,
SciGrow).  

‘TX Sorghum’ was used as a surrogate scenario for millet because
sorghum is very similar to millet in terms of crop type and production
methods, and is grown predominantly in the southern plains region of the
U.S. (Texas being one of the major producers of millet).  Below are the
model results for predicted surface water concentrations (using the
PRZM-EXAMS model) and groundwater concentrations (using SciGrow).  

SURFACE WATER DRINKING WATER CONCENTRATIONS FOR FLUROXYPYR ACID, MODELED
USING PRZM-EXAMS (PCA = 87%)

Scenario	Peak (acute)	1 in 10 Year Annual Mean		30 Year Overall Mean

NCapple 

(Pome Fruit):	  18.97	ppb		   0.2507 ppb				0.090171 ppb

TXsorghum 

(Millet):	  15.42	ppb		   0.2121 ppb				0.065419 ppb

TXalfalfa

(Rangeland):	  32.9 ppb		   3.28 ppb				1.76 ppb

Results for estimated (high-end) groundwater fluroxypyr concentrations
from SciGrow were obtained using the maximum proposed application rates.

GROUND WATER DRINKING WATER CONCENTRATIONS FOR FLUROXYPYR RESULTING FROM
PRPOSED NEW USES – MODELED USING SCIGROW

SciGrow output for Pome Fruit use = 0.0503 ppb

SciGrow output for Millet, Proso Millet, Pearl Millet use = 0.0252 ppb

FATE PARAMETERS USED FOR MODELING FLUROXYPYR ACID

Parameter	Value	Comments

Molecular Weight	255.03 g/mol

	Vapor Pressure	9.4×10-7 mmHg

	Henry’s Law Constant	0.0005 atm/mol.m3

	Solubility	7950 mg/L

	Koc	68	MRID 42137319 – average of 4 values from 4 different soils

Hydrolysis	pH 5: Stable

pH 7: Stable

pH 9: Stable	

MRID 40244539

Aqueous Photolysis	Stable	MRID 44080342

Aerobic Aquatic	42 days	MRID 44080345– 3X single soil (silt loam)
value of 14 days

Anaerobic Aquatic	24 days	MRID 44080344 – 3X single soil (silt loam)
value of 8 days

Aerobic Soil	14 days	MRID 42137317 – median value for 4 soil types

Application Rate: Sorghum	0.125 lb ai/A	Label

Application Method: Sorghum	Aerial Spray	Label

Number of Applications / Intervals: Sorghum	2 per year / 14 days	Label

Application Rate: Pome Fruit	0.5 lb ai/A	Label

Application Method: Pome Fruit	Ground Spray	Label

Number of Applications / Intervals: Pome Fruit	1 per year	Label

Physical/Chemical properties of both fluroxypyr-MHE (Starane®) and
fluroxypyr acid (active ingredient) are listed in the tables below.	

General Environmental Fate and Physico-chemical Properties of
Fluroxypyr-MHE

  tc "Table 1.  General Environmental Fate and Physico-chemical
Properties of Terbacil " \f D  CAS Number	

8140637-3

Molecular Formula	C7H5Cl2FN2O3

Parameter	Value	Source

Molecular Weight	367 g/mol	OPP/Pesticide Fact Sheet/1998

Melting Point	N/A

	log Kow	3.788	OPP/Pesticide Fact Sheet/1998

Water Solubility 	0.1 mg/L  @ pH 7	OPP/Pesticide Fact Sheet/1998

Vapor Pressure (25o C)	1.07 X 10-7 mm Hg 	OPP/Pesticide Fact Sheet/1998

Henry’s Law Constant	 5.75 X 10-7 atm m3/mol 	Calculated

Hydrolysis Half-life (25o C)	pH 5

pH 5

pH 7	pH 7

pH 9

	pH 9	

stable

stable

3.2 days	

MRID 40244539

Aqueous Photolysis Half-life 	Stable	MRID 44080342

Aerobic Soil Metabolism Half-life	silt loam soil: 12 days

sandy loam soil: 23 days

loam soil: 13 days

silty clay soil: 7 days

	MRID 42137317

Anaerobic Aquatic Metabolism Half-life	silt loam soil: 8 days

	MRID 44080344

Aerobic Aquatic Metabolism Half-life	silt loam sediment: 5.1 days	MRID
44080345

Soil Photolysis Half-life	152.7 days	MRID 44080343

Adsorption/Desorption	                             Kads         Koc 

loam                     1.9           62

sandy loam          0.11          51               

silt loam              1.7            78

silty clay loam     1.0            81	MRID 42137319

General Environmental Fate and Physico-chemical Properties of Fluroxypyr
Acid

  tc "Table 1.  General Environmental Fate and Physico-chemical
Properties of Terbacil " \f D  CAS Number	

69377-81-7

Molecular Formula	C7H5Cl2FN2O3

Parameter	Value	Source

Molecular Weight	255.03 g/mol	OPP/Pesticide Fact Sheet/1998

Melting Point	57.5 0C	OPP/Pesticide Fact Sheet/1998

log Kow	5.04 @ pH 7	OPP/Pesticide Fact Sheet/1998

Water Solubility 	7950 mg/L  	OPP/Pesticide Fact Sheet/1998

Vapor Pressure (25o C)	9.42X10-7 mmHg	MERCK

Henry’s Law Constant	 0.00050 atm m3/mol 	Calculated

Hydrolysis Half-life (25o C)	pH 5

pH 5

pH 7	pH 7

pH 9

	pH 9	

stable

stable

stable	

MRID 40244539

Aqueous Photolysis Half-life 	Stable	MRID 44080342

Aerobic Soil Metabolism Half-life	silt loam soil: 12 days

sandy loam soil: 23 days

loam soil: 13 days

silty clay soil: 7 days

	MRID 42137317

Anaerobic Aquatic Metabolism Half-life	silt loam soil: 8 days

	MRID 44080344

Aerobic Aquatic Metabolism Half-life	silt loam sediment: 14 days	MRID
44080345

Soil Photolysis Half-life	152.7 days	MRID 44080343

Adsorption/Desorption	                             Kads         Koc 

loam                     1.9           62

sandy loam          0.11          51               

silt loam              1.7            78

silty clay loam     1.0            81	MRID 42137319

PRZM-EXAMS RUN FOR FLUROXYPYR USE ON POME FRUIT (NC Apple scenario)

stored as STAR-DWa.out

Chemical: fluroxypyr

PRZM environment: NCappleC.txt	modified Satday, 12 October 2002 at
16:09:36

EXAMS environment: ir298.exv	modified Thuday, 29 August 2002 at 15:34:12

Metfile: w03812.dvf	modified Wedday, 3 July 2002 at 09:05:50

Water segment concentrations (ppb)

Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1965	1.291	0.8738	0.3243	0.1342	0.08995	0.02219

1966	33.45	22.8	7.638	2.717	1.812	0.447

1967	8.673	6.719	2.376	0.8917	0.5951	0.1469

1968	14.06	9.459	3.14	1.131	0.7546	0.1857

1969	0.9485	0.6518	0.2821	0.1223	0.0816	0.02015

1970	2.211	1.503	0.5033	0.1907	0.1292	0.03232

1971	1.119	0.7596	0.2782	0.103	0.06915	0.01706

1972	3.907	2.642	0.8693	0.3621	0.2533	0.06234

1973	19.16	12.81	4.14	1.526	1.018	0.251

1974	17.49	11.97	4.026	1.437	0.9581	0.2363

1975	1.313	0.8942	0.3248	0.1457	0.09733	0.02403

1976	2.651	1.808	1.033	0.4137	0.2762	0.06794

1977	4.973	3.365	1.108	0.4489	0.2996	0.07393

1978	7.95	5.389	1.958	0.7061	0.4709	0.1162

1979	1.335	0.9138	0.3083	0.1286	0.08621	0.02128

1980	1.145	0.7872	0.2672	0.1159	0.0831	0.02045

1981	0.2584	0.1833	0.06918	0.025	0.02087	0.007089

1982	0.2043	0.1384	0.07964	0.03508	0.0314	0.007982

1983	2.822	1.955	0.7099	0.267	0.1794	0.04426

1984	2.705	1.846	1.075	0.4285	0.286	0.07038

1985	15.74	10.73	3.584	1.293	0.8626	0.2128

1986	2.283	1.558	0.5586	0.227	0.1514	0.03737

1987	2.071	1.428	0.4901	0.1884	0.1268	0.03129

1988	0.6665	0.4602	0.1756	0.07826	0.05716	0.0141

1989	9.96	6.725	2.456	0.9103	0.6073	0.1498

1990	27.97	19.12	6.37	2.278	1.52	0.3749

Sorted results

Prob.	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

0.037037037037037	33.45	22.8	7.638	2.717	1.812	0.447

0.0740740740740741	27.97	19.12	6.37	2.278	1.52	0.3749

0.111111111111111	19.16	12.81	4.14	1.526	1.018	0.251

0.148148148148148	17.49	11.97	4.026	1.437	0.9581	0.2363

0.185185185185185	15.74	10.73	3.584	1.293	0.8626	0.2128

0.222222222222222	14.06	9.459	3.14	1.131	0.7546	0.1857

0.259259259259259	9.96	6.725	2.456	0.9103	0.6073	0.1498

0.296296296296296	8.673	6.719	2.376	0.8917	0.5951	0.1469

0.333333333333333	7.95	5.389	1.958	0.7061	0.4709	0.1162

0.37037037037037	4.973	3.365	1.108	0.4489	0.2996	0.07393

0.407407407407407	3.907	2.642	1.075	0.4285	0.286	0.07038

0.444444444444444	2.822	1.955	1.033	0.4137	0.2762	0.06794

0.481481481481481	2.705	1.846	0.8693	0.3621	0.2533	0.06234

0.518518518518518	2.651	1.808	0.7099	0.267	0.1794	0.04426

0.555555555555556	2.283	1.558	0.5586	0.227	0.1514	0.03737

0.592592592592593	2.211	1.503	0.5033	0.1907	0.1292	0.03232

0.62962962962963	2.071	1.428	0.4901	0.1884	0.1268	0.03129

0.666666666666667	1.335	0.9138	0.3248	0.1457	0.09733	0.02403

0.703703703703704	1.313	0.8942	0.3243	0.1342	0.08995	0.02219

0.740740740740741	1.291	0.8738	0.3083	0.1286	0.08621	0.02128

0.777777777777778	1.145	0.7872	0.2821	0.1223	0.0831	0.02045

0.814814814814815	1.119	0.7596	0.2782	0.1159	0.0816	0.02015

0.851851851851852	0.9485	0.6518	0.2672	0.103	0.06915	0.01706

0.888888888888889	0.6665	0.4602	0.1756	0.07826	0.05716	0.0141

0.925925925925926	0.2584	0.1833	0.07964	0.03508	0.0314	0.007982

0.962962962962963	0.2043	0.1384	0.06918	0.025	0.02087	0.007089

0.1	21.803	14.703	4.809	1.7516	1.1686	0.28817

					Average of yearly averages:	0.103644653846154

Inputs generated by pe4.pl - 8-August-2003

Data used for this run:

Output File: STAR-DWa

Metfile:	w03812.dvf

PRZM scenario:	NCappleC.txt

EXAMS environment file:	ir298.exv

Chemical Name:	fluroxypyr

Description	Variable Name	Value	Units	Comments

Molecular weight	mwt	255.03	g/mol

Henry's Law Const.	henry	0.0005	atm-m^3/mol

Vapor Pressure	vapr	9.4E-7	torr

Solubility	sol	7950	mg/L

Kd	Kd		mg/L

Koc	Koc	68	mg/L

Photolysis half-life	kdp	0	days	Half-life

Aerobic Aquatic Metabolism	kbacw	42	days	Halfife

Anaerobic Aquatic Metabolism	kbacs	24	days	Halfife

Aerobic Soil Metabolism	asm	14	days	Halfife

Hydrolysis:	pH 5	0	days	Half-life

Hydrolysis:	pH 7	0	days	Half-life

Hydrolysis:	pH 9	0	days	Half-life

Method:	CAM	2	integer	See PRZM manual

Incorporation Depth:	DEPI		cm

Application Rate:	TAPP	0.56	kg/ha

Application Efficiency:	APPEFF	0.99	fraction

Spray Drift	DRFT	0.01	fraction of application rate applied to pond

Application Date	Date	1-8	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)

PRZM-EXAMS RUN FOR FLUROXYPYR USE ON POME FRUIT (TX Sorghum scenario)

stored as STAR-DWs.out

Chemical: fluroxypyr

PRZM environment: TXsorghumOP.txt	modified Satday, 12 October 2002 at
17:29:44

EXAMS environment: ir298.exv	modified Thuday, 29 August 2002 at 15:34:12

Metfile: w13958.dvf	modified Wedday, 3 July 2002 at 09:06:24

Water segment concentrations (ppb)

Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	0.9481	0.5964	0.3973	0.1629	0.1087	0.02679

1962	0.8397	0.5682	0.3276	0.189	0.126	0.03108

1963	0.8417	0.5337	0.2962	0.1207	0.08048	0.01985

1964	1.463	0.9327	0.411	0.1634	0.109	0.0268

1965	11.92	7.972	3.028	1.136	0.7578	0.1869

1966	3.253	2.221	0.897	0.3276	0.2184	0.05391

1967	2.385	1.522	0.5791	0.2735	0.1824	0.04499

1968	4.27	2.742	1.664	0.6689	0.446	0.1097

1969	1.616	1.05	0.6666	0.2591	0.1729	0.04264

1970	23.34	15.16	4.717	1.72	1.147	0.2829

1971	0.8411	0.5319	0.2823	0.1262	0.0846	0.02089

1972	20.65	13.5	4.376	1.569	1.046	0.2573

1973	0.9383	0.601	0.3401	0.1396	0.09314	0.02297

1974	5.68	3.597	1.409	0.509	0.3393	0.08384

1975	2.48	1.637	0.6949	0.3408	0.2272	0.05603

1976	3.324	2.179	1.066	0.4258	0.284	0.06984

1977	0.8453	0.5449	0.3117	0.1434	0.09562	0.02363

1978	9.338	5.933	1.979	0.7688	0.5126	0.1264

1979	12.28	7.986	2.593	1.547	1.031	0.2543

1980	1.308	0.9315	0.6496	0.2436	0.1624	0.03999

1981	2.89	1.858	0.998	0.4105	0.2737	0.0675

1982	2.233	1.428	0.8142	0.3275	0.2184	0.05385

1983	4.512	2.938	1.208	0.4796	0.3198	0.07886

1984	0.8416	0.5345	0.3034	0.1227	0.0818	0.02012

1985	0.8515	0.548	0.294	0.1234	0.08235	0.02031

1986	18.92	12.28	4.985	1.836	1.224	0.3019

1987	1.503	1.089	0.5636	0.2394	0.1596	0.03937

1988	1.824	1.186	0.5194	0.2441	0.1627	0.04002

1989	4.877	3.199	1.904	0.7291	0.4861	0.1199

1990	9.112	5.756	1.914	0.6928	0.4621	0.1139

Sorted results

Prob.	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

0.032258064516129	23.34	15.16	4.985	1.836	1.224	0.3019

0.0645161290322581	20.65	13.5	4.717	1.72	1.147	0.2829

0.0967741935483871	18.92	12.28	4.376	1.569	1.046	0.2573

0.129032258064516	12.28	7.986	3.028	1.547	1.031	0.2543

0.161290322580645	11.92	7.972	2.593	1.136	0.7578	0.1869

0.193548387096774	9.338	5.933	1.979	0.7688	0.5126	0.1264

0.225806451612903	9.112	5.756	1.914	0.7291	0.4861	0.1199

0.258064516129032	5.68	3.597	1.904	0.6928	0.4621	0.1139

0.290322580645161	4.877	3.199	1.664	0.6689	0.446	0.1097

0.32258064516129	4.512	2.938	1.409	0.509	0.3393	0.08384

0.354838709677419	4.27	2.742	1.208	0.4796	0.3198	0.07886

0.387096774193548	3.324	2.221	1.066	0.4258	0.284	0.06984

0.419354838709677	3.253	2.179	0.998	0.4105	0.2737	0.0675

0.451612903225806	2.89	1.858	0.897	0.3408	0.2272	0.05603

0.483870967741936	2.48	1.637	0.8142	0.3276	0.2184	0.05391

0.516129032258065	2.385	1.522	0.6949	0.3275	0.2184	0.05385

0.548387096774194	2.233	1.428	0.6666	0.2735	0.1824	0.04499

0.580645161290323	1.824	1.186	0.6496	0.2591	0.1729	0.04264

0.612903225806452	1.616	1.089	0.5791	0.2441	0.1627	0.04002

0.645161290322581	1.503	1.05	0.5636	0.2436	0.1624	0.03999

0.67741935483871	1.463	0.9327	0.5194	0.2394	0.1596	0.03937

0.709677419354839	1.308	0.9315	0.411	0.189	0.126	0.03108

0.741935483870968	0.9481	0.601	0.3973	0.1634	0.109	0.0268

0.774193548387097	0.9383	0.5964	0.3401	0.1629	0.1087	0.02679

0.806451612903226	0.8515	0.5682	0.3276	0.1434	0.09562	0.02363

0.838709677419355	0.8453	0.548	0.3117	0.1396	0.09314	0.02297

0.870967741935484	0.8417	0.5449	0.3034	0.1262	0.0846	0.02089

0.903225806451613	0.8416	0.5345	0.2962	0.1234	0.08235	0.02031

0.935483870967742	0.8411	0.5337	0.294	0.1227	0.0818	0.02012

0.967741935483871	0.8397	0.5319	0.2823	0.1207	0.08048	0.01985

0.1	18.256	11.8506	4.2412	1.5668	1.0445	0.257

					Average of yearly averages:	0.0878826666666667

Inputs generated by pe4.pl - 8-August-2003

Data used for this run:

Output File: STAR-DWs

Metfile:	w13958.dvf

PRZM scenario:	TXsorghumOP.txt

EXAMS environment file:	ir298.exv

Chemical Name:	fluroxypyr

Description	Variable Name	Value	Units	Comments

Molecular weight	mwt	255.03	g/mol

Henry's Law Const.	henry	0.0005	atm-m^3/mol

Vapor Pressure	vapr	9.4E-7	torr

Solubility	sol	7950	mg/L

Kd	Kd		mg/L

Koc	Koc	68	mg/L

Photolysis half-life	kdp	0	days	Half-life

Aerobic Aquatic Metabolism	kbacw	42	days	Halfife

Anaerobic Aquatic Metabolism	kbacs	24	days	Halfife

Aerobic Soil Metabolism	asm	14	days	Halfife

Hydrolysis:	pH 5	0	days	Half-life

Hydrolysis:	pH 7	0	days	Half-life

Hydrolysis:	pH 9	0	days	Half-life

Method:	CAM	2	integer	See PRZM manual

Incorporation Depth:	DEPI		cm

Application Rate:	TAPP	0.14	kg/ha

Application Efficiency:	APPEFF	0.95	fraction

Spray Drift	DRFT	0.16	fraction of application rate applied to pond

Application Date	Date	1-5	dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1	interval	14	days	Set to 0 or delete line for single app.

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)