Document ID: EPA-HQ-OPP-2007-0325-0008
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2008-04-02T04:00Z

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

	WASHINGTON, D.C.  20460

OFFICE OF PREVENTION, PESTICIDES AND TOXIC SUBSTANCES

May 31, 2005							DP Barcode: 317705

PC Code: 029801, 029806, 129043

MEMORANDUM 

SUBJECT: Drinking water assessment for Dicamba on sugarcane.

TO:		Susan Lewis, Branch Chief

Kendra Tyler, CRM

Special Review and Reregistration Division   (7508C)

	

FROM:	Ibrahim Abdel-Saheb, Environmental Scientist

Environmental Risk Branch II

Environmental Fate and Effects Division

THRU:	Dana Spatz, Senior Chemist

Environmental Risk Branch II

Environmental Fate and Effects Division

Tom Bailey, Branch Chief

Environmental Risk Branch II

Environmental Fate and Effects Division

CONCLUSIONS

This drinking water assessment is for the herbicide active ingredient
Dicamba (Chemical Name: 3,6-Dichloro-o-anisic acid), and its degradate
dichlorosalicylic acid (DCSA).  Dicamba acid is formed by the
dissociation of the following dicamba salts: dimethylamine, sodium,
diglycolamine, isopropylamine, and potassium.  Results from an
acceptable dissociation rate study (MRID# 43288001) showed that dicamba
salts reach essentially 100% dissociation within 75 seconds of the time
of mixing with pure water.  Thus, this water memo reflects the exposure
EECs resulting from the use of any of the dicamba salt formulations.

 ADVANCE \d4 Dicamba is a benzoic acid herbicide.  It can be applied to
the leaves or to the soil. Dicamba controls annual and perennial
broadleaf weeds in grain crops and grasslands, and it is used to control
brush and bracken in pastures.  In combination with a phenoxyalkanoic
acid or other herbicide, dicamba is used in pastures, range land, and
non-crop areas such as fence-rows and roadways to control weeds. 
Dicamba is absorbed by leaves and roots, and moves throughout the plant.
 In some plants, it may accumulate in the tips of leaves.  Dicamba acts
as a growth regulator.  Some plants can metabolize or break down
dicamba. 

The Tier II screening models PRZM1 and EXAMS2 with the Index Reservoir
and Percent Crop Area adjustment (IR-PCA PRZM/EXAMS) were used to
determine estimated surface water concentrations of Dicamba acid and its
degradate DCSA.

Based on PRZM/EXAMS modeling, the surface water Expected Environmental
Concentrations (EEC) of  Dicamba acid and its degradate DCSA for the use
on sugarcane are shown in table 1.

Table 1. Estimated drinking water concentrations to be used for exposure
to Dicamba acid,  and its degradate dichlorosalicylic acid (DCSA) in
drinking water derived from Surface Water.

Crop	

Model EECs  (μg/L)

              Dicamba

	

DCSA

	

use(s) modeled	

PCA

	

Acute	

One-in-10-year annual mean	

36 year overall mean	

Acute	

One-in-10-year annual mean	

36 year overall mean	

One application @ 2.8 lbai/A (parent); and 0.446 lbai/A (DCSA)	

0.87

FL-Sugarcane (Ground)	

357	

13.0	

5.23	

10.1	

0.75	

0.40

FL-Sugarcane (Aerial)	

346	

12.9	

5.38	

10.9	

8.13	

0.47

LA-Sugarcane (Ground)	

233	

9.74	

3.13	

8.79	

0.66	

0.32

LA-Sugarcane (Aerial)	

230	

9.74	

3.44	

9.74	

0.73	

0.39

Ground Water	

0.016

	

0.008

Environmental Fate Assessment:

Aerobic soil metabolism is the main degradative process for dicamba.  A
single observed half-life for dicamba was six days, with formation of
the intermediate non-persistent degradate DCSA.  DCSA degraded at
roughly the same rate as dicamba; the final metabolites were carbon
dioxide and microbial biomass. Dicamba is stable to abiotic hydrolysis
at all pH's and photodegrades slowly in water and on soil.  Dicamba is
more persistent under anaerobic soil:water systems in the laboratory,
with a half-life of 141 days.  The major degradate under anaerobic
conditions was DCSA, which was persistent, comprising > 60% of the
applied after 365 days of anaerobic incubation.  No other anaerobic
degradates were present at > 10% during the incubation.   There are no
acceptable data for the aerobic aquatic metabolism of dicamba;
supplemental information indicates that dicamba degrades more rapidly in
aquatic systems when sediment is present. 

Dicamba is very soluble (6100 ppm) and very mobile (Koc = 13.4) in the
laboratory.  Because dicamba is not persistent under aerobic conditions,
very little dicamba could be expected to leach to groundwater.  If any
dicamba did reach anaerobic ground water, it would be somewhat
persistent (due to its anaerobic half-life of 141 days); any DCSA that
reached ground water would be expected to persist.  Results from two
acceptable field dissipation studies conducted with dimethylamine salt
of dicamba, indicated that dicamba dissipated with a half-life range of
4.4 to 19.8 days.  The DCSA was the major degradate in both studies.
Both, dicamba and its degradate (DCSA) were found in soil segments
deeper than 10 cm.

Dicamba is not expected to bioaccumulate in aquatic organisms because it
is an anion at environmental pHs (pKa = 1.9).

Monitoring data

Monitoring data were not used to refine this Tier I assessment. 
However, monitoring data are available in the Pesticides in Ground Water
Database [Hoheisel et al. 1991] for dicamba (3,172 wells sampled) and
5-hydroxy dicamba (87 wells sampled). Out of the wells sampled, there
were no reports of residues greater than the stated MCL (200 µg/L
lifetime).  However, the detection limits are unknown, and it is not
known if wells were sampled in areas where dicamba was used.  STORET
contains records for sampling for dicamba in samples from lakes, ocean,
estuary, canal, or reservoir sites.  The data have not been extensively
evaluated; in addition, it is uncertain what the actual detection limits
were for the samples and whether samples were taken from areas where
dicamba was not in use.  The US Geological Survey National Water Quality
Assessment program (NAWQA) is not currently analyzing for dicamba in
their samples, and they do not have analytical methods for this chemical
in place.

SURFACE WATER

PRZM-EXAMS simulations were conducted for Dicamba acid and its degradate
DCSA use on sugarcane to evaluate the cumulative probability
distribution for peak and annual mean EECs. Selective PRZM/EXAMS
modeling inputs are shown in Tables 2 and 3. The input and output files
for these runs are in Appendix I.



Table 2. Surface Water Exposure Inputs for PRZM/EXAMS for Dicamba acid.

Input variable (Units)	

Input value & calculations	

Source

Crop name	

sugarcane	

EPA Reg. No. 7969-140

application rate (lb ai/acre)	

2.8	

EPA Reg. No. 7969-140

Interval between appl. (d)	

N/A	

EPA Reg. No. 7969-140

Application efficiency	

0.95 (aerial); 0.99 (ground)

	

Input parameters guideline (2/28/2002).

Spray drift fraction	

0.16 (aerial); 0.064 (ground)	

Input parameters guideline (2/28/2002).

DWRATE (day-1)	

0.038 (6 d x 3)	

MRID # 43245207; Input parameters guideline (2/28/2002). 

DSRATE (day-1)	

0.038	

MRID # 43245207; Input parameters guideline (2/28/2002).

Koc (mL/g)	

13.4 (average)	

MRID# 42774101; Input parameters guideline (2/28/2002).

Henry's Law Const. (atm.m3/mole)

	

1.6X10-9	

calculated

KBACW (h-1)	

0.058 (6X2=12 d) 	

No data; aerobic soil metabolism half-life rate X 0.5; Input parameters
guideline (2/28/2002).

KBACS (h-1)	

0.0016 (141X3=423 d)	

MRID# 43245208; Input parameters guideline (2/28/2002). 

KDP (h-1)	

0.00076 (914.4) 	

MRID# 42774102; Input parameters guideline (2/28/2002). 

KBH, KNH, KAH (h-1)	

stable	

MRID# 40547902; Input parameters guideline (2/28/2002). 

KPS (mL/g) 	

13.4 (average)	

MRID# 42774101; Input parameters guideline (2/28/2002).

MWT (g/mole)	

221	

SANDOZE Safety Data Sheet (Nov, 1989).

Solubility @ 25 0C (mg/L)	

6100	

SANDOZE Safety Data Sheet (Nov, 1989).

Vapor pressure (torr)	

3.41X10-5	

SANDOZE Safety Data Sheet (Nov, 1989).

Table 3. Surface Water Exposure Inputs for PRZM/EXAMS for DCSA.

Input variable (Units)	

Input value & calculations	

Source

Crop name	

sugarcane	

EPA Reg. No. 7969-140

application rate (lb ai/acre)	

0.446*	

EPA Reg. No. 7969-140

Interval between appl. (d)	

N/A	

EPA Reg. No. 7969-140

Application efficiency	

0.95 (aerial); 0.99 (ground)

	

Input parameters guideline (2/28/2002).

Spray drift fraction	

0.16 (aerial); 0.064 (ground)	

Input parameters guideline (2/28/2002).

DWRATE (day-1)	

0.0282 (8.2 d x3)	

MRID # 43245207; Input parameters guideline (2/28/2002). 

DSRATE (day-1)	

0.0282 (8.2 d x3)	

MRID # 43245207; Input parameters guideline (2/28/2002).

Koc (mL/g)	

1208 (average)	

MRID# 43095301; Input parameters guideline (2/28/2002).

Henry's Law Const. (atm.m3/mole)

	

1.6X10-9	

calculated for dicamba

KBACW (h-1)	

0.058 (8.2X2=16.4 d) 	

No data; aerobic soil metabolism half-life rate X 0.5; Input parameters
guideline (2/28/2002).

KBACS (h-1)	

stable	

MRID# 43245208; Input parameters guideline (2/28/2002). 

KDP (h-1)	

0.00076 (914.4) 	

For dicamba; MRID# 42774102; Input parameters guideline (2/28/2002). 

KBH, KNH, KAH (h-1)	

stable	

For dicamba; MRID# 40547902; Input parameters guideline (2/28/2002). 

KPS (mL/g) 	

1208 (average)	

MRID# 43095301; Input parameters guideline (2/28/2002).

MWT (g/mole)	

207	

Product Chemistry Info.

Solubility @ 25 0C (mg/L)	

2112	

MRID# 43095301

Vapor pressure (torr)	

3.41X10-5	

For dicamba; SANDOZE Safety Data Sheet (Nov, 1989).

GROUND WATER

The SCI-GROW model is based on scaled ground water concentration from
ground water monitoring studies, environmental fate properties (aerobic
soil half-lives and organic carbon partitioning coefficients-Koc 's) and
application rates. The model is based on permeable soils that are
vulnerable to leaching and on shallow ground water (10-30 feet).
SCI-GROW version 2.3 (executable file dated 08/05/2003) was used to
estimate concentrations of Dicamba acid,  and its degradate
dichlorosalicylic acid (DCSA) that could be found in drinking water
derived from ground water, using the input values listed in the tables 4
and 5. 

Table 4. Ground Water Exposure Inputs for SCI-GROW for  Dicamba acid.

MODEL INPUT VARIABLE	

INPUT VALUE

	

COMMENTS

Application Rate

(lbs. ai/A)	

2.8	

EPA Reg. No. 7969-140

Maximum No. of

Applications	

1	

EPA Reg. No. 7969-140

Koc (mL/g)	

3.45	

Lowest value; MRID# 42774101; Input guideline2, 2002. 

Aerobic Soil

Metabolic Half-life

(days)	

6	

MRID MRID # 43245207; Input guideline2, 2002. 



Table 5. Ground Water Exposure Inputs for SCI-GROW for  DCSA.

MODEL INPUT VARIABLE	

INPUT VALUE

	

COMMENTS

Application Rate

(lbs. ai/A)	

0.446	

EPA Reg. No. 7969-140

Maximum No. of

Applications	

1	

EPA Reg. No. 7969-140

Koc (mL/g)	

242.4	

Lowest value; MRID# 43095301; Input guideline2, 2002. 

Aerobic Soil

Metabolic Half-life

(days)	

8.2	

MRID MRID # 43245207; Input guideline2, 2002. 

Results from the SCI-GROW screening model predict that the maximum
chronic and acute concentration of parent Dicamba acid,  and its
degradates the dichlorosalicylic acid (DCSA) in shallow ground water is
not expected to exceed 0.016 µg/L, and 0.0081µg/L, respectively, for
the current maximum seasonal use rate on sugarcane. 

	



APPENDIX I

IR-PCA PRZM/EXAMS INPUT & OUTPUT FILES

DICAMBA

FL-Sugarcane (Ground)

stored	as	DicaFLGr.out

Chemical:	dicamba

	PRZM	environment:	FLsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w12844.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	9.964	8.696	6.909	5.306	3.801	0.943

1962	87.71	75.51	45.4	21.47	14.8	3.664

1963	490	427	246	106	71.57	17.7

1964	89.42	77.5	47.63	24.72	16.79	4.143

1965	20.89	17.95	10.75	7.108	5.768	1.451

1966	9.576	8.448	5.791	4.438	3.249	0.8084

1967	39.41	33.75	24	10.68	7.983	2.04

1968	34.53	30.81	22.7	12.46	8.648	2.137

1969	249	226	131	56.09	38.38	9.496

1970	153	134	76.58	32.17	22.31	5.576

1971	90.64	78	51.97	27.52	19.29	4.781

1972	390	339	208	90.06	60.62	14.93

1973	69.17	59.06	33.84	15.6	10.96	2.72

1974	21.67	19.13	12.59	6.741	4.958	1.235

1975	12.59	11.75	8.947	5.771	4.11	1.021

1976	64.42	58.27	42.85	20.12	13.88	3.426

1977	301	260	151	67.27	46.02	11.39

1978	49.28	42.92	34.64	17.17	11.69	2.894

1979	395	344	202	89.16	60.4	14.93

1980	126	111	67.87	33.68	22.87	5.641

1981	37.37	31.96	24.49	14.13	10.09	2.504

1982	307	266	160	70.13	47.44	11.72

1983	9.783	8.575	5.729	4.73	3.511	0.875

1984	139	120	71.76	30.67	21.4	5.337

1985	157	137	83.94	41.26	27.85	6.883

1986	26.61	22.85	13.95	9.008	7.043	1.771

1987	99.88	85.67	60.66	27.55	19.08	4.723

1988	412	358	207	89.3	60.6	14.95

1989	511	449	266	114	76.47	18.89

1990	35.28	30.72	19.69	10.94	7.553	1.872

Sorted	results

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

0.032258	511	449	266	114	76.47	18.89

0.064516	490	427	246	106	71.57	17.7

0.096774	412	358	208	90.06	60.62	14.95

0.129032	395	344	207	89.3	60.6	14.93

0.16129	390	339	202	89.16	60.4	14.93

0.193548	307	266	160	70.13	47.44	11.72

0.225806	301	260	151	67.27	46.02	11.39

0.258065	249	226	131	56.09	38.38	9.496

0.290323	157	137	83.94	41.26	27.85	6.883

0.322581	153	134	76.58	33.68	22.87	5.641

0.354839	139	120	71.76	32.17	22.31	5.576

0.387097	126	111	67.87	30.67	21.4	5.337

0.419355	99.88	85.67	60.66	27.55	19.29	4.781

0.451613	90.64	78	51.97	27.52	19.08	4.723

0.483871	89.42	77.5	47.63	24.72	16.79	4.143

0.516129	87.71	75.51	45.4	21.47	14.8	3.664

0.548387	69.17	59.06	42.85	20.12	13.88	3.426

0.580645	64.42	58.27	34.64	17.17	11.69	2.894

0.612903	49.28	42.92	33.84	15.6	10.96	2.72

0.645161	39.41	33.75	24.49	14.13	10.09	2.504

0.677419	37.37	31.96	24	12.46	8.648	2.137

0.709677	35.28	30.81	22.7	10.94	7.983	2.04

0.741935	34.53	30.72	19.69	10.68	7.553	1.872

0.774194	26.61	22.85	13.95	9.008	7.043	1.771

0.806452	21.67	19.13	12.59	7.108	5.768	1.451

0.83871	20.89	17.95	10.75	6.741	4.958	1.235

0.870968	12.59	11.75	8.947	5.771	4.11	1.021

0.903226	9.964	8.696	6.909	5.306	3.801	0.943

0.935484	9.783	8.575	5.791	4.73	3.511	0.875

0.967742	9.576	8.448	5.729	4.438	3.249	0.8084

0.1	410.3	356.6	207.9	89.984	60.618	14.948

	Average	of	yearly	averages:	6.015047

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DicaFLGr

Metfile:	w12844.dvf

	PRZM	scenario:	FLsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	221.04	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	6100	mg/L

	Kd	Kd	mg/L

Koc	Koc	13.4	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	12	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	423	days	Halfife

Aerobic	Soil	Metabolism	asm	18	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	3.14	kg/ha

Application	Efficiency:	APPEFF	0.99	fraction

Spray	Drift	DRFT	0.064	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

FL-Sugarcane (Aerial)

stored	as	DicaFLAr.out

Chemical:	dicamba

	PRZM	environment:	FLsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w12844.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	18.33	15.8	10.04	7.651	5.367	1.329

1962	86.93	74.83	45.05	23.21	15.96	3.949

1963	473	413	238	103	70.4	17.41

1964	89.79	77.81	48.41	26.21	17.78	4.387

1965	21.41	18.4	10.99	9.053	7.211	1.806

1966	18.34	16.04	10.64	6.861	4.867	1.208

1967	38.03	32.57	23.15	10.3	9.375	2.381

1968	34.93	31.24	23.2	14.51	10.01	2.473

1969	242	219	127	56.16	38.53	9.531

1970	147	130	73.76	30.99	23.04	5.754

1971	88.21	75.9	51.57	29.01	20.27	5.022

1972	382	333	204	88.97	59.88	14.75

1973	68.21	58.24	33.35	17.45	12.18	3.021

1974	21.95	19.43	12.7	8.979	6.444	1.601

1975	18.34	15.94	9.747	8.066	5.644	1.4

1976	65.29	59.14	42.97	21.92	15.07	3.72

1977	291	251	146	66.55	45.85	11.35

1978	53.23	46.41	36.27	19	12.92	3.196

1979	385	335	197	88.07	59.68	14.75

1980	130	114	69.71	34.97	23.73	5.851

1981	37.99	32.5	24.53	16.02	11.34	2.81

1982	300	260	157	69.78	47.19	11.66

1983	19.95	17.44	11.46	7.139	5.117	1.271

1984	134	115	69.24	29.6	22.32	5.561

1985	162	142	86.46	42.16	28.46	7.032

1986	26.92	23.12	14.07	10.57	8.531	2.137

1987	98.43	84.42	59.47	29.18	20.15	4.987

1988	399	346	200	87.66	59.86	14.76

1989	502	441	261	112	75.06	18.54

1990	39.81	34.66	21.89	13.02	8.935	2.213

Sorted	results

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

0.032258	502	441	261	112	75.06	18.54

0.064516	473	413	238	103	70.4	17.41

0.096774	399	346	204	88.97	59.88	14.76

0.129032	385	335	200	88.07	59.86	14.75

0.16129	382	333	197	87.66	59.68	14.75

0.193548	300	260	157	69.78	47.19	11.66

0.225806	291	251	146	66.55	45.85	11.35

0.258065	242	219	127	56.16	38.53	9.531

0.290323	162	142	86.46	42.16	28.46	7.032

0.322581	147	130	73.76	34.97	23.73	5.851

0.354839	134	115	69.71	30.99	23.04	5.754

0.387097	130	114	69.24	29.6	22.32	5.561

0.419355	98.43	84.42	59.47	29.18	20.27	5.022

0.451613	89.79	77.81	51.57	29.01	20.15	4.987

0.483871	88.21	75.9	48.41	26.21	17.78	4.387

0.516129	86.93	74.83	45.05	23.21	15.96	3.949

0.548387	68.21	59.14	42.97	21.92	15.07	3.72

0.580645	65.29	58.24	36.27	19	12.92	3.196

0.612903	53.23	46.41	33.35	17.45	12.18	3.021

0.645161	39.81	34.66	24.53	16.02	11.34	2.81

0.677419	38.03	32.57	23.2	14.51	10.01	2.473

0.709677	37.99	32.5	23.15	13.02	9.375	2.381

0.741935	34.93	31.24	21.89	10.57	8.935	2.213

0.774194	26.92	23.12	14.07	10.3	8.531	2.137

0.806452	21.95	19.43	12.7	9.053	7.211	1.806

0.83871	21.41	18.4	11.46	8.979	6.444	1.601

0.870968	19.95	17.44	10.99	8.066	5.644	1.4

0.903226	18.34	16.04	10.64	7.651	5.367	1.329

0.935484	18.34	15.94	10.04	7.139	5.117	1.271

0.967742	18.33	15.8	9.747	6.861	4.867	1.208

0.1	397.6	344.9	203.6	88.88	59.878	14.759

	Average	of	yearly	averages:	6.195333

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DicaFLAr

Metfile:	w12844.dvf

	PRZM	scenario:	FLsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	221.04	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	6100	mg/L

	Kd	Kd	mg/L

Koc	Koc	13.4	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	12	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	423	days	Halfife

Aerobic	Soil	Metabolism	asm	18	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	3.14	kg/ha

Application	Efficiency:	APPEFF	0.95	fraction

Spray	Drift	DRFT	0.16	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

LA-Sugarcane (Ground)

stored	as	DicaLAgr.out

Chemical:	dicamba

	PRZM	environment:	LAsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w13970.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	126	111	75.6	35.68	24.59	6.098

1962	280	254	154	68.29	46.64	11.54

1963	7.339	6.47	4.387	2.152	1.459	0.3649

1964	28.67	25.42	20.75	10.25	6.939	1.711

1965	64.03	56.64	35.34	16.39	11.1	2.746

1966	163	145	97.6	46.11	31.27	7.733

1967	59.42	52.24	36.16	19.41	13.17	3.259

1968	11.07	9.798	6.269	3.793	2.582	0.6382

1969	14.86	13.26	9.358	5.353	3.634	0.8987

1970	127	113	73.27	35.87	24.28	6.003

1971	10.61	9.571	5.986	4.157	2.903	0.7218

1972	22.58	19.72	12.25	7.334	5.06	1.25

1973	342	313	212	98.02	66.21	16.36

1974	38.95	34.73	22.72	11	7.443	1.845

1975	55.59	49.14	30.31	14.55	9.987	2.474

1976	31.13	27.59	17.56	9.345	6.621	1.641

1977	92.03	82.21	54.58	25.29	17.08	4.223

1978	88.5	76.73	54.45	24.73	17.04	4.22

1979	344	314	205	94.67	64.27	15.9

1980	46.46	41.66	31.82	15.53	10.5	2.595

1981	12.45	10.99	8.261	4.293	2.908	0.7198

1982	33.3	30.09	20.22	9.737	6.571	1.624

1983	54.43	49.28	32.33	16.54	11.35	2.812

1984	14.03	12.28	8.154	5.122	3.593	0.8903

1985	7.334	6.537	4.35	2.661	1.818	0.4501

1986	78.9	70.31	44.45	20.81	14.09	3.482

1987	17.11	14.87	8.895	5.306	3.705	0.9197

1988	38.27	34.17	22.49	10.73	7.267	1.792

1989	56.18	49.03	29.01	13.69	9.465	2.345

1990	15.63	13.98	9.067	5.107	3.466	0.8577

Sorted	results

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

0.032258	344	314	212	98.02	66.21	16.36

0.064516	342	313	205	94.67	64.27	15.9

0.096774	280	254	154	68.29	46.64	11.54

0.129032	163	145	97.6	46.11	31.27	7.733

0.16129	127	113	75.6	35.87	24.59	6.098

0.193548	126	111	73.27	35.68	24.28	6.003

0.225806	92.03	82.21	54.58	25.29	17.08	4.223

0.258065	88.5	76.73	54.45	24.73	17.04	4.22

0.290323	78.9	70.31	44.45	20.81	14.09	3.482

0.322581	64.03	56.64	36.16	19.41	13.17	3.259

0.354839	59.42	52.24	35.34	16.54	11.35	2.812

0.387097	56.18	49.28	32.33	16.39	11.1	2.746

0.419355	55.59	49.14	31.82	15.53	10.5	2.595

0.451613	54.43	49.03	30.31	14.55	9.987	2.474

0.483871	46.46	41.66	29.01	13.69	9.465	2.345

0.516129	38.95	34.73	22.72	11	7.443	1.845

0.548387	38.27	34.17	22.49	10.73	7.267	1.792

0.580645	33.3	30.09	20.75	10.25	6.939	1.711

0.612903	31.13	27.59	20.22	9.737	6.621	1.641

0.645161	28.67	25.42	17.56	9.345	6.571	1.624

0.677419	22.58	19.72	12.25	7.334	5.06	1.25

0.709677	17.11	14.87	9.358	5.353	3.705	0.9197

0.741935	15.63	13.98	9.067	5.306	3.634	0.8987

0.774194	14.86	13.26	8.895	5.122	3.593	0.8903

0.806452	14.03	12.28	8.261	5.107	3.466	0.8577

0.83871	12.45	10.99	8.154	4.293	2.908	0.7218

0.870968	11.07	9.798	6.269	4.157	2.903	0.7198

0.903226	10.61	9.571	5.986	3.793	2.582	0.6382

0.935484	7.339	6.537	4.387	2.661	1.818	0.4501

0.967742	7.334	6.47	4.35	2.152	1.459	0.3649

0.1	268.3	243.1	148.36	66.072	45.103	11.1593

	Average	of	yearly	averages:	3.603807

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DicaLAgr

Metfile:	w13970.dvf

	PRZM	scenario:	LAsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	221.04	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	6100	mg/L

	Kd	Kd	mg/L

Koc	Koc	13.4	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	12	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	423	days	Halfife

Aerobic	Soil	Metabolism	asm	18	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	3.14	kg/ha

Application	Efficiency:	APPEFF	0.99	fraction

Spray	Drift	DRFT	0.064	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

LA-Sugarcane (Aerial)

stored	as	DicaLAAr.out

Chemical:	dicamba

	PRZM	environment:	LAsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w13970.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	127	115	78.11	38.31	26.37	6.537

1962	275	249	151	68.46	46.82	11.59

1963	18.34	16.17	10.38	4.824	3.258	0.8095

1964	36.65	32.49	25.27	12.69	8.586	2.117

1965	70.22	62.12	38.76	18.58	12.58	3.11

1966	164	147	99.13	47.26	32.04	7.923

1967	68.31	60.06	40.81	21.4	14.51	3.592

1968	18.34	16.29	12.4	6.557	4.446	1.098

1969	20.57	18.61	15.4	8.122	5.499	1.36

1970	133	118	76.61	37.32	25.25	6.244

1971	18.34	16.45	10.8	7.099	4.887	1.212

1972	24.49	21.38	14.34	9.937	6.809	1.681

1973	338	310	210	97.16	65.62	16.22

1974	48.68	43.4	28.27	13.47	9.11	2.257

1975	58.29	51.53	31.91	17.03	11.66	2.886

1976	32.4	28.71	18.55	12.03	8.426	2.086

1977	96.31	86.15	57.28	27.24	18.39	4.546

1978	88.78	76.98	54.21	26.67	18.32	4.538

1979	337	309	201	93.71	63.71	15.76

1980	51.06	45.79	36.09	17.92	12.11	2.991

1981	18.84	17.58	14.15	6.987	4.725	1.169

1982	39.95	36.02	25.43	12.3	8.292	2.049

1983	60.16	54.47	35.73	19.13	13.1	3.243

1984	18.34	16.37	10.58	7.913	5.473	1.354

1985	18.34	16.34	10.64	5.514	3.742	0.9257

1986	84.13	74.98	47.4	22.9	15.49	3.829

1987	18.87	16.46	10.81	8.13	5.605	1.389

1988	46.22	41.26	27.31	13.29	8.995	2.218

1989	57.55	50.21	29.7	16.11	11.09	2.745

1990	20.69	18.51	14.4	7.868	5.322	1.316

Sorted	results

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

0.032258	338	310	210	97.16	65.62	16.22

0.064516	337	309	201	93.71	63.71	15.76

0.096774	275	249	151	68.46	46.82	11.59

0.129032	164	147	99.13	47.26	32.04	7.923

0.16129	133	118	78.11	38.31	26.37	6.537

0.193548	127	115	76.61	37.32	25.25	6.244

0.225806	96.31	86.15	57.28	27.24	18.39	4.546

0.258065	88.78	76.98	54.21	26.67	18.32	4.538

0.290323	84.13	74.98	47.4	22.9	15.49	3.829

0.322581	70.22	62.12	40.81	21.4	14.51	3.592

0.354839	68.31	60.06	38.76	19.13	13.1	3.243

0.387097	60.16	54.47	36.09	18.58	12.58	3.11

0.419355	58.29	51.53	35.73	17.92	12.11	2.991

0.451613	57.55	50.21	31.91	17.03	11.66	2.886

0.483871	51.06	45.79	29.7	16.11	11.09	2.745

0.516129	48.68	43.4	28.27	13.47	9.11	2.257

0.548387	46.22	41.26	27.31	13.29	8.995	2.218

0.580645	39.95	36.02	25.43	12.69	8.586	2.117

0.612903	36.65	32.49	25.27	12.3	8.426	2.086

0.645161	32.4	28.71	18.55	12.03	8.292	2.049

0.677419	24.49	21.38	15.4	9.937	6.809	1.681

0.709677	20.69	18.61	14.4	8.13	5.605	1.389

0.741935	20.57	18.51	14.34	8.122	5.499	1.36

0.774194	18.87	17.58	14.15	7.913	5.473	1.354

0.806452	18.84	16.46	12.4	7.868	5.322	1.316

0.83871	18.34	16.45	10.81	7.099	4.887	1.212

0.870968	18.34	16.37	10.8	6.987	4.725	1.169

0.903226	18.34	16.34	10.64	6.557	4.446	1.098

0.935484	18.34	16.29	10.58	5.514	3.742	0.9257

0.967742	18.34	16.17	10.38	4.824	3.258	0.8095

0.1	263.9	238.8	145.813	66.34	45.342	11.2233

	Average	of	yearly	averages:	3.95984

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DicaLAAr

Metfile:	w13970.dvf

	PRZM	scenario:	LAsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	221.04	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	6100	mg/L

	Kd	Kd	mg/L

Koc	Koc	13.4	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	12	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	423	days	Halfife

Aerobic	Soil	Metabolism	asm	18	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	3.14	kg/ha

Application	Efficiency:	APPEFF	0.95	fraction

Spray	Drift	DRFT	0.16	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

DCSA

FL-Sugarcane (Ground)

stored	as	DCSAFLgr.out

Chemical:	dicamba

	PRZM	environment:	FLsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w12844.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	1.243	1.138	0.7954	0.5673	0.4676	0.1382

1962	3.359	2.916	1.769	0.9972	0.8673	0.2724

1963	9.561	8.737	5.32	2.532	1.836	0.5195

1964	6.828	5.997	4.049	2.797	2.135	0.6127

1965	2.901	2.509	1.79	1.103	0.8277	0.2934

1966	3.094	2.685	1.9	1.368	1.027	0.3388

1967	4.058	3.56	2.58	1.531	1.139	0.3715

1968	6.505	5.663	4.866	3.061	2.283	0.6771

1969	5.996	5.224	3.769	2.362	1.826	0.5535

1970	4.595	3.97	3.276	2.027	1.462	0.4496

1971	5.078	4.559	2.703	1.59	1.311	0.3958

1972	13.48	11.72	7.929	5.287	3.84	1.067

1973	2.425	2.097	1.424	1.135	0.9363	0.3161

1974	1.066	0.9318	0.6087	0.4622	0.463	0.1782

1975	2.152	1.865	1.362	0.9197	0.7765	0.2476

1976	6.27	5.566	3.522	2.329	1.776	0.5192

1977	11.14	9.675	7.088	4.229	3.034	0.8698

1978	2.115	1.827	1.169	1.053	0.9648	0.3199

1979	18.2	15.9	9.859	4.988	3.598	0.9962

1980	3.612	3.145	2.295	1.574	1.258	0.3905

1981	2.74	2.372	1.645	1.059	0.87	0.2811

1982	11.7	10.54	7.088	3.865	2.911	0.8083

1983	2.462	2.226	1.923	1.025	0.8424	0.2724

1984	7.875	6.915	4.308	2.494	1.816	0.5499

1985	2.43	2.133	1.374	1.11	0.8724	0.2908

1986	2.015	1.796	1.338	0.9378	0.7002	0.2479

1987	4.987	4.319	2.852	1.546	1.226	0.3647

1988	8.004	7.033	4.393	3.095	2.378	0.6995

1989	10.33	9.641	6.104	2.817	2.013	0.5715

1990	3.093	2.675	1.71	1.109	0.9423	0.309

Sorted	results

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

0.032258	18.2	15.9	9.859	5.287	3.84	1.067

0.064516	13.48	11.72	7.929	4.988	3.598	0.9962

0.096774	11.7	10.54	7.088	4.229	3.034	0.8698

0.129032	11.14	9.675	7.088	3.865	2.911	0.8083

0.16129	10.33	9.641	6.104	3.095	2.378	0.6995

0.193548	9.561	8.737	5.32	3.061	2.283	0.6771

0.225806	8.004	7.033	4.866	2.817	2.135	0.6127

0.258065	7.875	6.915	4.393	2.797	2.013	0.5715

0.290323	6.828	5.997	4.308	2.532	1.836	0.5535

0.322581	6.505	5.663	4.049	2.494	1.826	0.5499

0.354839	6.27	5.566	3.769	2.362	1.816	0.5195

0.387097	5.996	5.224	3.522	2.329	1.776	0.5192

0.419355	5.078	4.559	3.276	2.027	1.462	0.4496

0.451613	4.987	4.319	2.852	1.59	1.311	0.3958

0.483871	4.595	3.97	2.703	1.574	1.258	0.3905

0.516129	4.058	3.56	2.58	1.546	1.226	0.3715

0.548387	3.612	3.145	2.295	1.531	1.139	0.3647

0.580645	3.359	2.916	1.923	1.368	1.027	0.3388

0.612903	3.094	2.685	1.9	1.135	0.9648	0.3199

0.645161	3.093	2.675	1.79	1.11	0.9423	0.3161

0.677419	2.901	2.509	1.769	1.109	0.9363	0.309

0.709677	2.74	2.372	1.71	1.103	0.8724	0.2934

0.741935	2.462	2.226	1.645	1.059	0.87	0.2908

0.774194	2.43	2.133	1.424	1.053	0.8673	0.2811

0.806452	2.425	2.097	1.374	1.025	0.8424	0.2724

0.83871	2.152	1.865	1.362	0.9972	0.8277	0.2724

0.870968	2.115	1.827	1.338	0.9378	0.7765	0.2479

0.903226	2.015	1.796	1.169	0.9197	0.7002	0.2476

0.935484	1.243	1.138	0.7954	0.5673	0.4676	0.1782

0.967742	1.066	0.9318	0.6087	0.4622	0.463	0.1382

0.1	11.644	10.4535	7.088	4.1926	3.0217	0.86365

	Average	of	yearly	averages:	0.46407

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DCSAFLgr

Metfile:	w12844.dvf

	PRZM	scenario:	FLsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	207	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	2112	mg/L

	Kd	Kd	mg/L

Koc	Koc	1208	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	16.4	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	0	days	Halfife

Aerobic	Soil	Metabolism	asm	24.6	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	0.45	kg/ha

Application	Efficiency:	APPEFF	1	fraction

Spray	Drift	DRFT	0.064	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

FL-Sugarcane (Aerial)

stored	as	DCSAFLar.out

Chemical:	dicamba

	PRZM	environment:	FLsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w12844.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	2.62	2.272	1.392	0.9495	0.7321	0.2084

1962	3.77	3.276	2.007	1.387	1.138	0.3458

1963	9.989	9.138	5.567	2.915	2.101	0.5916

1964	7.414	6.509	4.362	3.102	2.396	0.6835

1965	2.939	2.545	1.826	1.131	1.03	0.3644

1966	3.149	2.738	1.942	1.412	1.288	0.4123

1967	4.097	3.598	2.615	1.563	1.322	0.4439

1968	6.579	5.73	4.935	3.15	2.55	0.7497

1969	6.419	5.62	4.012	2.482	2.089	0.6252

1970	4.641	4.013	3.336	2.068	1.717	0.5192

1971	5.284	4.741	2.819	1.878	1.582	0.469

1972	14.05	12.22	8.383	5.612	4.103	1.139

1973	2.718	2.353	1.583	1.381	1.196	0.3865

1974	2.64	2.306	1.399	0.8208	0.7255	0.2494

1975	2.633	2.299	1.419	1.145	1.041	0.3195

1976	6.364	5.655	3.604	2.527	2.047	0.5928

1977	11.53	10.02	7.303	4.378	3.298	0.9415

1978	2.67	2.34	1.686	1.341	1.228	0.3915

1979	18.99	16.59	10.28	5.224	3.864	1.069

1980	3.724	3.245	2.383	1.949	1.53	0.4643

1981	2.834	2.456	1.703	1.345	1.128	0.3512

1982	12.53	11.26	7.531	4.145	3.17	0.8785

1983	2.669	2.343	1.976	1.2	1.112	0.3453

1984	7.969	7	4.371	2.542	2.034	0.6239

1985	4.004	3.513	2.218	1.497	1.141	0.3636

1986	2.639	2.319	1.435	0.9666	0.9627	0.3218

1987	5.241	4.542	3.059	1.92	1.506	0.4406

1988	8.563	7.522	4.692	3.241	2.639	0.7711

1989	11.91	11.01	6.931	3.192	2.272	0.6417

1990	3.187	2.759	1.774	1.374	1.204	0.3798

Sorted	results

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

0.032258	18.99	16.59	10.28	5.612	4.103	1.139

0.064516	14.05	12.22	8.383	5.224	3.864	1.069

0.096774	12.53	11.26	7.531	4.378	3.298	0.9415

0.129032	11.91	11.01	7.303	4.145	3.17	0.8785

0.16129	11.53	10.02	6.931	3.241	2.639	0.7711

0.193548	9.989	9.138	5.567	3.192	2.55	0.7497

0.225806	8.563	7.522	4.935	3.15	2.396	0.6835

0.258065	7.969	7	4.692	3.102	2.272	0.6417

0.290323	7.414	6.509	4.371	2.915	2.101	0.6252

0.322581	6.579	5.73	4.362	2.542	2.089	0.6239

0.354839	6.419	5.655	4.012	2.527	2.047	0.5928

0.387097	6.364	5.62	3.604	2.482	2.034	0.5916

0.419355	5.284	4.741	3.336	2.068	1.717	0.5192

0.451613	5.241	4.542	3.059	1.949	1.582	0.469

0.483871	4.641	4.013	2.819	1.92	1.53	0.4643

0.516129	4.097	3.598	2.615	1.878	1.506	0.4439

0.548387	4.004	3.513	2.383	1.563	1.322	0.4406

0.580645	3.77	3.276	2.218	1.497	1.288	0.4123

0.612903	3.724	3.245	2.007	1.412	1.228	0.3915

0.645161	3.187	2.759	1.976	1.387	1.204	0.3865

0.677419	3.149	2.738	1.942	1.381	1.196	0.3798

0.709677	2.939	2.545	1.826	1.374	1.141	0.3644

0.741935	2.834	2.456	1.774	1.345	1.138	0.3636

0.774194	2.718	2.353	1.703	1.341	1.128	0.3512

0.806452	2.67	2.343	1.686	1.2	1.112	0.3458

0.83871	2.669	2.34	1.583	1.145	1.041	0.3453

0.870968	2.64	2.319	1.435	1.131	1.03	0.3218

0.903226	2.639	2.306	1.419	0.9666	0.9627	0.3195

0.935484	2.633	2.299	1.399	0.9495	0.7321	0.2494

0.967742	2.62	2.272	1.392	0.8208	0.7255	0.2084

0.1	12.468	11.235	7.5082	4.3547	3.2852	0.9352

	Average	of	yearly	averages:	0.536133

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DCSAFLar

Metfile:	w12844.dvf

	PRZM	scenario:	FLsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	207	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	2112	mg/L

	Kd	Kd	mg/L

Koc	Koc	1208	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	16.4	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	0	days	Halfife

Aerobic	Soil	Metabolism	asm	24.6	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	0.45	kg/ha

Application	Efficiency:	APPEFF	1	fraction

Spray	Drift	DRFT	0.16	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

AL-Sugarcane (Ground)

stored	as	DCSALAgr.out

Chemical:	dicamba

	PRZM	environment:	LAsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w13970.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	3.41	3.034	2.489	1.464	1.137	0.3631

1962	9.88	9.092	5.763	2.991	2.257	0.6805

1963	1.106	0.9817	0.6356	0.3182	0.2755	0.1323

1964	3.022	2.659	2.024	1.152	0.8616	0.2692

1965	1.785	1.586	1.088	0.6734	0.5138	0.1679

1966	7.31	6.548	4.46	2.438	1.785	0.5322

1967	3.271	2.897	1.958	1.28	0.9692	0.3248

1968	1.078	0.9594	0.7175	0.4415	0.3233	0.1198

1969	1.064	0.9579	0.8035	0.5646	0.4229	0.1487

1970	3.634	3.311	2.143	1.474	1.093	0.336

1971	1.079	0.9678	0.6823	0.5786	0.4714	0.1747

1972	6.735	6.095	4.538	2.27	1.698	0.5165

1973	13.64	12.27	8.424	4.754	3.408	1

1974	1.361	1.219	0.8775	0.6956	0.5351	0.207

1975	6.814	6.052	4.03	2.182	1.649	0.5073

1976	3.647	3.278	2.184	1.222	0.9546	0.3221

1977	10.16	9.089	6.818	3.613	2.583	0.7698

1978	5.705	5.012	3.3	1.79	1.343	0.4513

1979	14.68	13.12	8.769	4.61	3.339	1.002

1980	3.817	3.489	2.335	1.556	1.254	0.4246

1981	3.106	2.756	1.816	1.172	0.9078	0.2875

1982	3.154	2.936	1.925	1.128	0.8256	0.2529

1983	2.437	2.163	1.568	1.153	1.01	0.3226

1984	1.09	0.9684	0.6545	0.5829	0.4563	0.1611

1985	1.063	0.9473	0.6173	0.4334	0.3691	0.1347

1986	2.489	2.224	1.46	1.326	1.036	0.3121

1987	1.474	1.3	0.8817	0.6433	0.5186	0.1888

1988	1.324	1.184	0.8736	0.5321	0.4162	0.1444

1989	5.491	4.981	3.839	2.698	2.067	0.6309

1990	1.106	0.9918	0.7739	0.6021	0.5198	0.1966

Sorted	results

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

0.032258	14.68	13.12	8.769	4.754	3.408	1.002

0.064516	13.64	12.27	8.424	4.61	3.339	1

0.096774	10.16	9.092	6.818	3.613	2.583	0.7698

0.129032	9.88	9.089	5.763	2.991	2.257	0.6805

0.16129	7.31	6.548	4.538	2.698	2.067	0.6309

0.193548	6.814	6.095	4.46	2.438	1.785	0.5322

0.225806	6.735	6.052	4.03	2.27	1.698	0.5165

0.258065	5.705	5.012	3.839	2.182	1.649	0.5073

0.290323	5.491	4.981	3.3	1.79	1.343	0.4513

0.322581	3.817	3.489	2.489	1.556	1.254	0.4246

0.354839	3.647	3.311	2.335	1.474	1.137	0.3631

0.387097	3.634	3.278	2.184	1.464	1.093	0.336

0.419355	3.41	3.034	2.143	1.326	1.036	0.3248

0.451613	3.271	2.936	2.024	1.28	1.01	0.3226

0.483871	3.154	2.897	1.958	1.222	0.9692	0.3221

0.516129	3.106	2.756	1.925	1.172	0.9546	0.3121

0.548387	3.022	2.659	1.816	1.153	0.9078	0.2875

0.580645	2.489	2.224	1.568	1.152	0.8616	0.2692

0.612903	2.437	2.163	1.46	1.128	0.8256	0.2529

0.645161	1.785	1.586	1.088	0.6956	0.5351	0.207

0.677419	1.474	1.3	0.8817	0.6734	0.5198	0.1966

0.709677	1.361	1.219	0.8775	0.6433	0.5186	0.1888

0.741935	1.324	1.184	0.8736	0.6021	0.5138	0.1747

0.774194	1.106	0.9918	0.8035	0.5829	0.4714	0.1679

0.806452	1.106	0.9817	0.7739	0.5786	0.4563	0.1611

0.83871	1.09	0.9684	0.7175	0.5646	0.4229	0.1487

0.870968	1.079	0.9678	0.6823	0.5321	0.4162	0.1444

0.903226	1.078	0.9594	0.6545	0.4415	0.3691	0.1347

0.935484	1.064	0.9579	0.6356	0.4334	0.3233	0.1323

0.967742	1.063	0.9473	0.6173	0.3182	0.2755	0.1198

0.1	10.132	9.0917	6.7125	3.5508	2.5504	0.76087

	Average	of	yearly	averages:	0.36938

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DCSALAgr

Metfile:	w13970.dvf

	PRZM	scenario:	LAsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	207	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	2112	mg/L

	Kd	Kd	mg/L

Koc	Koc	1208	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	16.4	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	0	days	Halfife

Aerobic	Soil	Metabolism	asm	24.6	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	0.45	kg/ha

Application	Efficiency:	APPEFF	1	fraction

Spray	Drift	DRFT	0.064	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,

AL-Sugarcane (Aerial)

stored	as	DCSALAar.out

Chemical:	dicamba

	PRZM	environment:	LAsugarcaneC.txt	modified	Satday,	12	October

EXAMS	environment:	ir298.exv	modified	Thuday,	29	August

Metfile:	w13970.dvf	modified	Wedday,	3	July	2002

Water	segment	concentrations	(ppb)

	Year	Peak	96 hr	21 Day	60 Day	90 Day	Yearly

1961	4.042	3.595	3.001	1.926	1.461	0.4513

1962	10.69	9.821	6.223	3.372	2.567	0.7666

1963	2.682	2.374	1.51	0.7311	0.5628	0.2123

1964	3.623	3.202	2.565	1.576	1.157	0.3512

1965	3.014	2.675	1.973	1.097	0.8091	0.2503

1966	8.422	7.543	5.102	2.878	2.092	0.6179

1967	3.747	3.319	2.283	1.696	1.259	0.4061

1968	2.654	2.36	1.614	0.872	0.6233	0.2033

1969	2.635	2.363	1.711	1.002	0.7276	0.2335

1970	4.196	3.81	2.762	1.903	1.392	0.4196

1971	2.656	2.378	1.567	1.03	0.7867	0.2623

1972	7.041	6.384	4.777	2.698	1.996	0.5989

1973	15.05	13.53	9.303	5.204	3.722	1.087

1974	2.937	2.622	1.783	1.125	0.835	0.2907

1975	7.5	6.662	4.416	2.625	1.961	0.5942

1976	4.019	3.611	2.408	1.669	1.267	0.4095

1977	11.27	10.08	7.477	4.049	2.886	0.8543

1978	6.128	5.385	3.603	2.223	1.644	0.5349

1979	15.72	14.04	9.405	5.026	3.646	1.088

1980	4.067	3.711	2.483	1.997	1.56	0.5097

1981	3.567	3.167	2.173	1.598	1.204	0.37

1982	4.265	3.929	2.784	1.562	1.127	0.3365

1983	2.647	2.385	1.978	1.61	1.337	0.4137

1984	2.655	2.369	1.542	1.023	0.7634	0.2468

1985	2.639	2.351	1.523	0.8687	0.6725	0.2191

1986	3.661	3.269	2.365	1.757	1.336	0.3952

1987	2.654	2.377	1.565	1.086	0.8274	0.2747

1988	2.646	2.462	1.784	0.9711	0.7223	0.2292

1989	5.674	5.154	4.128	2.845	2.371	0.7153

1990	2.682	2.399	1.688	1.037	0.8219	0.2804

Sorted	results

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

0.032258	15.72	14.04	9.405	5.204	3.722	1.088

0.064516	15.05	13.53	9.303	5.026	3.646	1.087

0.096774	11.27	10.08	7.477	4.049	2.886	0.8543

0.129032	10.69	9.821	6.223	3.372	2.567	0.7666

0.16129	8.422	7.543	5.102	2.878	2.371	0.7153

0.193548	7.5	6.662	4.777	2.845	2.092	0.6179

0.225806	7.041	6.384	4.416	2.698	1.996	0.5989

0.258065	6.128	5.385	4.128	2.625	1.961	0.5942

0.290323	5.674	5.154	3.603	2.223	1.644	0.5349

0.322581	4.265	3.929	3.001	1.997	1.56	0.5097

0.354839	4.196	3.81	2.784	1.926	1.461	0.4513

0.387097	4.067	3.711	2.762	1.903	1.392	0.4196

0.419355	4.042	3.611	2.565	1.757	1.337	0.4137

0.451613	4.019	3.595	2.483	1.696	1.336	0.4095

0.483871	3.747	3.319	2.408	1.669	1.267	0.4061

0.516129	3.661	3.269	2.365	1.61	1.259	0.3952

0.548387	3.623	3.202	2.283	1.598	1.204	0.37

0.580645	3.567	3.167	2.173	1.576	1.157	0.3512

0.612903	3.014	2.675	1.978	1.562	1.127	0.3365

0.645161	2.937	2.622	1.973	1.125	0.835	0.2907

0.677419	2.682	2.462	1.784	1.097	0.8274	0.2804

0.709677	2.682	2.399	1.783	1.086	0.8219	0.2747

0.741935	2.656	2.385	1.711	1.037	0.8091	0.2623

0.774194	2.655	2.378	1.688	1.03	0.7867	0.2503

0.806452	2.654	2.377	1.614	1.023	0.7634	0.2468

0.83871	2.654	2.374	1.567	1.002	0.7276	0.2335

0.870968	2.647	2.369	1.565	0.9711	0.7223	0.2292

0.903226	2.646	2.363	1.542	0.872	0.6725	0.2191

0.935484	2.639	2.36	1.523	0.8687	0.6233	0.2123

0.967742	2.635	2.351	1.51	0.7311	0.5628	0.2033

0.1	11.212	10.0541	7.3516	3.9813	2.8541	0.84553

	Average	of	yearly	averages:	0.454083

	Inputs	generated	by	pe4.pl	-	8-Aug-03

	Data	used	for	this	run:

Output	File:	DCSALAar

Metfile:	w13970.dvf

	PRZM	scenario:	LAsugarcaneC.txt

EXAMS	environment	file:	ir298.exv

	Chemical	Name:	dicamba

Description	Variable	Name	Value	Units	Comments

	Molecular	weight	mwt	207	g/mol

Henry's	Law	Const.	henry	1.60E-09	atm-m^3/mol

Vapor	Pressure	vapr	3.41E-05	torr

Solubility	sol	2112	mg/L

	Kd	Kd	mg/L

Koc	Koc	1208	mg/L

	Photolysis	half-life	kdp	38.1	days	Half-life

	Aerobic	Aquatic	Metabolism	kbacw	16.4	days	Halfife

Anaerobic	Aquatic	Metabolism	kbacs	0	days	Halfife

Aerobic	Soil	Metabolism	asm	24.6	days	Halfife

Hydrolysis:	pH	7	0	days	Half-life

	Method:	CAM	2	integer	See	PRZM	manual

Incorporation	Depth:	DEPI	0	cm

Application	Rate:	TAPP	0.45	kg/ha

Application	Efficiency:	APPEFF	1	fraction

Spray	Drift	DRFT	0.16	fraction	of	application

Application	Date	Date	15-04	dd/mm	or	dd/mmm

Record	17:00	FILTRA

	IPSCND	1

	UPTKF

	Record	18:00	PLVKRT

	PLDKRT

FEXTRC	0.5

Flag	for	Index	Res.	Run	IR	IR

Flag	for	runoff	calc.	RUNOFF	total	none,



                           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:dicamba

 time is  6/ 1/2005  14:59:35

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

  Application      Number of       Total Use    Koc      Soil Aerobic

  rate (lb/acre)  applications      (lb/acre/yr)  (ml/g)   metabolism
(days)

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

      2.800              1.0                  2.800      3.45E+00       
6.0

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

 groundwater screening cond (ppb) =   1.61E-02 

 ***********************************************************************
*

 

                           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:DCSA

 time is  6/ 1/2005  15: 0:52

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

  Application      Number of       Total Use    Koc      Soil Aerobic

  rate (lb/acre)  applications      (lb/acre/yr)  (ml/g)   metabolism
(days)

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

      0.446                 1.0                 0.446      2.42E+02     
  8.2

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

 groundwater screening cond (ppb) =   8.01E-03 

 ***********************************************************************
*

 PAGE  3