+----------------+-----------------------------------------------------+
| ![](med        | Number range CHAPTER**UNITED STATES ENVIRONMENTAL   |
| ia/image1.wmf) | PROTECTION AGENCY**                                 |
|                |                                                     |
|                | WASHINGTON D.C., 20460                              |
|                |                                                     |
|                | OFFICE OF                                           |
|                |                                                     |
|                | PREVENTION, PESTICIDES AND                          |
|                |                                                     |
|                | TOXIC SUBSTANCES                                    |
+----------------+-----------------------------------------------------+

Number range CHAPTER February 14, 2008

PC Code: 122001

DP Barcode D334277

**MEMORANDUM**

Subject: Tier I Sulfometuron Methyl Drinking Water Assessment for
Reregistration Eligibility Decision Document (slightly revised)

To: John Pates, Review Manager

Special Review and Reregistration Division (SRRD) (7505P)

From: Michael R. Barrett, Ph.D., Senior Chemist

Environmental Risk Branch V

> Environmental Fate and Effects Division (7507P)

Thru: Mah Shamim, Ph.D., Chief

Environmental Risk Branch V

> Environmental Fate and Effects Division (7507P)

This memo presents the Tier I Estimated Drinking Water Concentrations
(EDWCs) of sulfometuron methyl (CAS No. 74222-97-2), calculated using
FIRST (surface water) and SCI-GROW (ground water) for use in the human
health risk assessment. Exposure estimates have also been generated for
the total residues of sulfometuron methyl which include sulfometuron and
major degradates such as a pyrimidine amine, a sulfonamide degradate,
and saccharin (See Appendix 1 for full chemical names and structures).
Sulfometuron methyl is a non-selective herbicide for use in forestry
plantings, on rights-of-way, industrial sites, around buildings,
railroads, pipelines, etc.

Exposure to sulfometuron methyl parent and sulfometuron total residues
has been estimated with FIRST (FQPA Index Reservoir Screening Tool;
v.1.1.0; dated 1/1/2007) and SCI-GROW (Screening Concentration In GROund
Waterm v2.3), results are summarized below.

**[Parent Exposure estimates]{.underline}:**

For surface water, the acute value is **31.98 ppb** and the chronic is
**14.51 ppb**. The groundwater screening concentration is **0.33 ppb**.
These values represent upper-bound estimates of the concentrations that
might be found in surface water (a vulnerable reservoir) and ground
water due to the use of sulfometuron methyl at the maximum allowable
rate within the watershed.

**[Parent + Degradate exposure estimates]{.underline}:**

For surface water, the acute value is **32.35 ppb** and the chronic is
**21.82 ppb**. The groundwater screening concentration is **1.13 ppb**.
These values represent upper-bound estimates of the concentrations that
might be found in surface water (a vulnerable reservoir) and ground
water due to the use of sulfometuron methyl at the maximum allowable
rate within the watershed.

**Data Gaps**:

The available environmental fate studies do not provide sufficient data
for modeling of individual degradates of sulfometuron methyl that could
be of toxicological concern. Should such estimates be required in the
future, than additional environmental fate studies specific to the
degradates of concern may be required.

**Error Correction Note:**

This document replaces the October 31, 2007 Drinking Water Assessment.
The only revision is that a duplicate (and mislabeled) degradate entry
in Appendix 1 has been deleted.

#  

# Sulfometuron methyl drinking water assessment

## Nature of Chemical Stressor

Sulfometuron methyl, (2-\[\[\[\[(4,6-Dimethyl-2-pyrimidinyl) amino\]
carbonyl\] amino\] sulfonyl\] benzoic acid, methyl ester), is a
broad-spectrum pre- and post-emergence herbicide that is currently
registered for weed control in forestry and non-food crop situations,
including vegetative management in right of ways and railroads. It is
used to control a variety of broad-leaf weeds and grasses. Similar to
other sulfonylurea herbicides, the mode of action of sulfometuron methyl
involves inhibiting the activity of the enzyme acetolactate synthase
(ALS), which in turn inhibits the synthesis of selected amino acids that
are required for cell proliferation in plants.

Sulfometuron methyl is formulated as a water dispersible granule (WDG)
and applied using a variety of methods including helicopter, fixed-wing
aircraft, ground spray (boom and backpack) and spot treatment. It is
generally applied once per year for non-crop areas in years that
vegetation management is needed. In some instances (weed escapes) a
second application may be made, but all products limit the total
quantity of sulfometuron methyl that may be applied (from any source) to
6 ounces of active ingredient per acre per year (0.375 lb ai/A).
Therefore, application rates in general forestry, and for site
preparation and/or release in conifer, hardwood and Christmas tree
plantations, will vary significantly depending upon the specific purpose
of the application and the desirable tree species. In forestry, uses can
be similar to plantation sites, but may also include the maintenance of
access routes and fire breaks. It is further noted that use rates can
also vary with climate and soil type.

## Environmental Fate and Transport Characterization

The body of environmental fate data submitted demonstrate sulfometuron
is mobile and persistent in the environment (Appendix 2). Sulfometuron
methyl is more soluble in neutral and alkaline water than in acidic
water. The major route of dissipation for sulfometuron methyl is
believed to be aerobic and anaerobic degradation / metabolism in soil
and water (pseudo first-order degradation half-lives generally around 2
to 6 months), with hydrolysis potentially dominant under acidic
conditions. First-order rate aerobic soil metabolism half lives range
from 52 to 58 days in two laboratory studies (technically both with the
same soil type, but measured in two independent studies several years
apart). In comparison, dissipation half-lives in the field ranged from
44 to 128 days at four sites (when considering only the residues
remaining in the upper 15 cm of topsoil). The longer persistence of
residues in the soil at one field site indicates that degradation in
some soils is slower under some field conditions than observed in many
of the laboratory studies. Sulfometuron methyl is subject to hydrolysis
at environmental pHs; with significantly more rapid hydrolysis occurring
under acidic conditions (e.g., a hydrolysis half-life of 9 days at pH 5
and 139 days at pH 7). However, laboratory and field studies in soil or
sediment / water environments, albeit all at measured pHs somewhat
greater than 5, do not generally show as rapid degradation as measured
in the pH hydrolysis study.

.

Metabolism in the aquatic environment is variable, ranging from
half-life of 17 to 104 days in anaerobic conditions and 9 to 187 days
for aerobic conditions (the more rapid degradation with a 9-day total
system half-life took place in a test system with sediment pH of 5.4 and
water pH of 7.6). Although sulfometuron methyl persistence is expected
to generally increase with higher soil pH (rotational crop restrictions
for many other sulfonylureas, which are all weak acids, reflect this), a
consistent trend was not found in the available studies.

Soil retention of sulfometuron methyl is low, with Freundlich adsorption
K~F~ values ranging between 0.15 and 2.1 ml/g in four test soils with
soil organic carbon content ranging between 0.6 and 2.6 percent.

Sorption was not found to be strongly dependent on any of the major
properties of the tested soils in the registrant-submitted studies. The
pKa of sulfometuron methyl is 5.4, and theoretically, adsorption may
increase in very acidic soils where the methyl ester form of
sulfometuron would predominate. However, the pH range of the four test
soils in the batch equilibrium adsorption / desorption study was only
6.7 to 7.7. The published literature do seem to show more of a
relationship of sulfometuron methyl and other sulfonylureas to mobility
in soil; Weber et al. (2004) [^1]have reviewed the literature and
concluded that there is a consistent relationship between pH and
mobility of sulfonylureas ("NHSO~2~ acid herbicides" means sulfonylurea
herbicides):

> OM and pH were also the primary soil properties in best-fit *K*~d~
> equations obtained for five of the six NHSO~2~ acid herbicides, with
> all three soil properties utilized in the *K*~d~ equation for
> sulfometuron-methyl. Cl was also one component of the *K*~d~ equation
> for sulfometuron-methyl, but Cl and pH were also related soil
> properties. As was the case for the COOH acid herbicides, sorption
> increased as OM increased or as pH decreased.

Other abbreviations used in the above excerpt from the Weber et al.
article:

OM = Soil organic mater content

Cl = Chloride ion concentration

COOH acid herbicides = Herbicides with a carboxy acid functional group
such as 2,4-D and Imazethapyr

In terrestrial field dissipation studies at four US sites, leaching of
parent sulfometuron methyl occurred at measurable concentrations (\>10
ppb in depth increments from 15 to 90 cm) was noted at each test site.
Leaching of the degradates was not evaluated in the field dissipation
studies.

Sulfometuron persistence in water indicates that if, either via spray
drift or any runoff event, sulfometuron methyl reaches surface water, it
may persist for a few weeks to several months and present some concern
to surface water resources. The fairly low use rate (maximum annual rate
of 0.375 lb ai/A) and the apparent typical use pattern of applying in
only one or two years out of a several year period should limit the
actual exposure of sulfometuron methyl residues in surface water
(however, note that sulfometuron methyl could negatively affect certain
sensitive plants at very low exposure levels because it is such a potent
herbicide with respect to many plant species).

Volatility studies were not reported. However, based its chemical
properties, volatilization is not expected to be a route of dissipation
of sulfometuron methyl in water or soils.

Sulfometuron methyl degrades to CO~2~ under aerobic, non-sterile
conditions (relatively little mineralization occurs under sterile
conditions), but with significant accumulation of intermediate
degradates, including a sulfonamide and saccharin from the phenyl ring
part of the parent molecule and a pyrimidine amine from the pyrimidine
ring portion (see Appendix 1). For the phenyl ring labeled studies,
CO~2~ was up to 28 to 44 % of applied at study termination whereas for
the pyrimidine-ring labeled studies CO~2~ was up to 53% of applied at
study.

The only submitted studies directly evaluating the fate of sulfometuron
methyl degradates were adsorption / desorption studies on the pyrimidine
amine and saccharin. The soil retention characteristics of two of the
sulfometuron methyl degradates were studied in batch equilibrium
adsorption / desorption studies: saccharin K~f~s were 0.03 to 0.27 and
the pyrimidine amine K~f~s were 0.17 to 3.70 in the four test soils.
This means saccharin would be slightly more mobile and the pyrimidine
amine slightly less mobile than parent (K~f~s of 0.15 to 2.12 in the
same four soils)

## Drinking Water Exposure Estimation

While some monitoring data are available, the data are not targeted to
watersheds known to present the highest exposure potential for
sulfometuron methyl. Consequently, EFED's Tier I models were used for
this drinking water exposure assessment.

### Model Descriptions

*Surface Water:* The FIRST ([F]{.underline}QPA [I]{.underline}ndex
[R]{.underline}eservoir [S]{.underline}creening [T]{.underline}ool,
Version 1.1.0) model by the Environmental Fate and Effects Division
(EFED) of the USEPA Office of Pesticide Programs (OPP) was used to
assess potential for contamination of surface drinking water sources
from the proposed sulfometuron methyl use.

FIRST is a single-event model (one runoff event), but can account for
spray drift from multiple applications. FIRST is hardwired to represent
the Index Reservoir, a standard water body used by the Office of
Pesticide Programs to assess drinking water exposure (Office of
Pesticide Programs, 2002). It was based on a real reservoir, Shipman
City Lake in Illinois, which was known to be vulnerable to pesticide
contamination (with ample confirmation from pesticide monitoring data).
The single runoff event moves a maximum of 8% of the applied pesticide
into the reservoir. This amount can be reduced due to degradation on the
field and the effects of binding to soil in the field. FIRST also uses a
Percent Cropped Area (PCA) factor to adjust for the area within the
watershed that is planted to the modeled crop. The national default PCA
of 0.87 was applied in this assessment.

*Ground Water:* Sulfometuron methyl concentrations in ground water were
estimated by the Screening Concentration in Ground Water (SCI-GROW v2.3,
Jul. 29, 2003) model. SCI-GROW is a regression model used as a screening
tool to estimate pesticide concentrations found in groundwater used as
drinking water. 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. Groundwater 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. The output of SCI-GROW
represents the concentrations sulfometuron methyl residues that might be
expected in shallow unconfined aquifers under sandy soils.

Further information on these models can be found at the EFED water model
website at http://
[www.epa.gov/oppefed1/models/water/html](http://www.epa.gov/oppefed1/models/water/html).

### Model Inputs and Results (Drinking Water Estimated Concentrations)

Key inputs for FIRST modeling, including data sources and parameter
estimation methods (if applicable) are summarized in Table 1 and results
for parent sulfometuron methyl are given in Table 3 and for the total
residues in Table 4. These are conservative estimates, in most cases the
potential exposure will be lower because the fraction of watershed land
which represents legally possible sulfometuron methyl use sites, and
furthermore, represents actual sulfometuron methyl use sites in any
given year is smaller than 0.87, the default percent crop (or use site)
area that needs to be used.

For ground water, SCI-GROW modeling inputs are presented in Table 2 and
Tier I estimated concentrations for drinking water arising from ground
water are provided for parent compound in Table 3 and for total residues
in Table 4. The predicted exposure levels are lower than for surface
water sources for drinking water.

[]{.mark}

Care needs to be used in assessing risk to sulfometuron total residues
including degradates from the DWECs presented here. The nature of the
total residue modeling method means that the total residues are
estimated as parent equivalents. Similar weight / volume drinking water
estimated concentrations for individual degradates which arise from
fractionation of the parent molecule would be substantially less (if
they could be calculated from the available environmental fate data).
Given the limited environmental fate data on the degradates, no
estimation of individual degradate concentrations is possible at this
time. The DWECs in these tables cannot be manipulated to provide
separate degradate and parent concentrations.

+---------------------+--------------+---------------------------------+
| Table 1. FIRST      |              |                                 |
| input parameters    |              |                                 |
| for modeling        |              |                                 |
| (DWECs).            |              |                                 |
+=====================+==============+=================================+
| ***Input            | *            | ***Reference***                 |
| Parameter***        | **Value\**** |                                 |
+---------------------+--------------+---------------------------------+
| **Molecular Weight  | 364.38       | MRID: 416728-02                 |
| (gram mole ^-1^)**  |              |                                 |
+---------------------+--------------+---------------------------------+
| **Vapor Pressure    | 5.4x10^-16^  |                                 |
| (torr)**            |              |                                 |
+---------------------+--------------+---------------------------------+
| **Aerobic Soil      | 61           | 90% Upper Confidence Limit of   |
| Metabolism          |              | the mean of measured values     |
| Half-life (days)**  |              | (MRIDs 42091401; 43174102 and   |
|                     |              | 245375)                         |
+---------------------+--------------+---------------------------------+
| **Water column      | 292          | 90% Upper Confidence Limit of   |
| Half-life (days)**  |              | the mean of measured values     |
|                     |              | (MRIDs 42091403 and 43174103 )  |
| **(Aerobic Aquatic  |              |                                 |
| Metabolism          |              |                                 |
| half-life)**        |              |                                 |
+---------------------+--------------+---------------------------------+
| **Benthic sediment  | 76           | 90% Upper Confidence Limit of   |
| Half-life (days)**  |              | the mean of measured values     |
|                     |              | (MRIDs 43174102, 245375,        |
| **(Anaerobic        |              | 42091402, and 43188601)         |
| Aquatic Metabolism  |              |                                 |
| half-life)**        |              |                                 |
+---------------------+--------------+---------------------------------+
| **Application Rate  | Up to 0.375  | Efficiency= 0.99 for ground     |
| (lb a.i. / A)**     |              | spray, 0.95 for aerial.         |
+---------------------+--------------+---------------------------------+
| **Application       | One, two or  | Product Label; typical use.     |
| Number (Method of   | three        | Maximum annual rate of 0.375 lb |
| application)**      |              | ai/ A was used in each case.    |
+---------------------+--------------+---------------------------------+
| **Application       | Aerial: NA   | Product Label; typical use.     |
| method; Depth of    |              |                                 |
| Incorporation       | Ground: 0    |                                 |
| (cm)**              |              |                                 |
+---------------------+--------------+---------------------------------+
| **Spray Drift       | 0.16 (GS),   | Default values for the FIRST    |
| (fraction)**        | 0.064        | model. (GS= ground spray) --    |
|                     | (aerial)     | Not a user input.               |
+---------------------+--------------+---------------------------------+
| **Solubility        | 244          | Highest solubility was recorded |
| (ppm)**             |              | for alkaline water (12,500 ppm  |
|                     |              | at pH 8.6). However, experience |
|                     |              | from other studies indicates    |
|                     |              | these experimental values are   |
|                     |              | too high.                       |
+---------------------+--------------+---------------------------------+
| **K~oc~ (L          | 35           | Lowest Koc value of the three   |
| Kg^-1^)**           |              | non-sand soils tested (MRID     |
|                     |              | 42789301). Koc model was        |
|                     |              | determined to be appropriate.   |
+---------------------+--------------+---------------------------------+
| **Hydrolysis        | 139 days     | MRID 42715201.                  |
| Half-life @ pH 7    |              |                                 |
| (days)**            |              |                                 |
+---------------------+--------------+---------------------------------+
| **Direct Aqueous    | Stable       | Maximum dark control corrected  |
| Photolysis          |              | value (MRIDs 42182401 and       |
| Half-life(days)**   |              | 43174101)                       |
+---------------------+--------------+---------------------------------+

Fate data values are as per Guidance for Selecting Input Parameters in
Modeling the Environmental Fate and Transport of Pesticides; Version II
February 28, 2002.

+---------------------+----------------+-------------------------------+
| Table 2. SCI-GROW   |                |                               |
| modeling inputs.    |                |                               |
+=====================+================+===============================+
| ***Input            | ***Value\****  | ***Reference***               |
| Parameter***        |                |                               |
+---------------------+----------------+-------------------------------+
| **Aerobic Soil      | 55.2           | Mean of measured values       |
| Metabolism          |                | (MRIDs 42091401; 43174102 and |
| Half-life (days)**  | (136 for total | 245375)                       |
|                     | residues)      |                               |
+---------------------+----------------+-------------------------------+
| **Application Rate  | 0.41           | Maximum permitted single (and |
| (Kg a.i. / ha)**    |                | annual) rate.                 |
+---------------------+----------------+-------------------------------+
| **Application       | One            | Typical use.                  |
| Number (Method of   |                |                               |
| application)**      |                |                               |
+---------------------+----------------+-------------------------------+
| **K~oc~ (L          | 73.4           | Median of four values (MRID   |
| Kg^-1^)**           |                | 42789301).                    |
|                     | (same for      |                               |
|                     | total          |                               |
|                     | residues)      |                               |
+---------------------+----------------+-------------------------------+

  ------------------- ----------------- --------- ---------- ------------------------- -------------------------
  Table 3. Tier I                                                                      
  EDWCs for                                                                            
  sulfometuron methyl                                                                  
  from forestry or                                                                     
  rights of way uses.                                                                  

  **Chemical**        **Application**                        **Peak Day (Acute)**      **Annual Average
                                                                                       (Chronic)**

  **Surface Water**   Rate (lb a.i./A)  Number    Interval   Concentration (µg/L)      

  Aerial              0.375             1         NA         31.96                     **[14.51]{.underline}**

  Ground              0.375             1         NA         **[31.98]{.underline}**   14.50

  Aerial              0.188             2         30         27.57                     12.52

  Aerial              0.125             3         90         16.53                     7.5

  Aerial              0.125             3         45         21.39                     9.7

  **Ground Water**                                                                     

  Aerial or ground    0.375             1         NA         0.33                      0.33
  ------------------- ----------------- --------- ---------- ------------------------- -------------------------

  ------------------- ----------------- --------- ---------- ------------------------- -------------------------
  Table 4. Tier I                                                                      
  EDWCs for                                                                            
  sulfometuron total                                                                   
  residues from                                                                        
  forestry or rights                                                                   
  of way uses\*.                                                                       

  **Chemical**        **Application**                        **Peak Day (Acute)**      **Annual Average
                                                                                       (Chronic)**

  **Surface Water**   Rate (lb a.i./A)  Number    Interval   Concentration (µg/L)      

  Aerial              0.375             1         NA         **[32.35]{.underline}**   **[21.82]{.underline}**

  Aerial              0.188             2         30         30.21                     20.38

  **Ground Water**                                                                     

  Aerial or ground    0.375             1         NA         1.13                      1.13
  ------------------- ----------------- --------- ---------- ------------------------- -------------------------

\* Includes sulfometuron methyl, sulfometuron free acid, sulfometuron
pyrimidine amine, sulfometuron sulfonamide, and saccharin.

## Review of Monitoring Data

[]{.mark}

In the most widespread monitoring survey available, sulfometuron methyl
was detected only rarely (2 of 132 samples from 52 sites -- mostly
Midwestern US streams and rivers, but including some reservoirs as
well); see Battaglin et al. (2000)[^2]. The maximum concentration of
sulfometuron methyl detected was 0.018 ug/L; but it is not known how
much sulfometuron methyl usage was associated with the watersheds
included in this monitoring survey.

Blomquist et al. (2001) in a monitoring study of 12 reservoir systems
across the United States found sulfometuron methyl occurred above the
minimum reporting limit of 0.05 ug/L in 12% of the samples collected
with a maximum concentration of 0.16 ug/L and a 95^th^ percentile
concentration of 0.10 ug/L.[^3] This study focused on drinking water
supplies and the results are directly relevant to this drinking water
assessment; however these data cannot be used for a conservative
(protective) estimate of drinking water exposure since there is no basis
to conclude that the study sites represent watersheds where exposure to
sulfometuron methyl is the highest.

[]{.mark}

[]{.mark}

[]{.mark}

[]{.mark}

[]{.mark}

# APPENDIX 1: Structures and Chemical Names of Sulfometuron methyl Metabolites

+-----------------------------------+-----------------------------------+
| Chemical Structures               |                                   |
|                                   |                                   |
| Trivial or common names           |                                   |
|                                   |                                   |
| Company id or similar alternate   |                                   |
| names                             |                                   |
|                                   |                                   |
| Full chemical names               |                                   |
+-----------------------------------+-----------------------------------+
| ![](me                            | ![](media/image3.j                |
| dia/image2.jpeg){width="2.9375in" | peg){width="1.6972222222222222in" |
| height="1.7090277777777778in"}    | height="1.3993055555555556in"}    |
|                                   |                                   |
| Sulfometuron methyl               | Saccharin                         |
|                                   |                                   |
| DPX-T5648; DPX-5648; IN-T5648; IN | IN-581                            |
| T5648-18                          |                                   |
|                                   | 1,2-Benzisothiazol-3(2H)-one,     |
| Methyl                            | 1,1-dioxide                       |
| 2-(4,6-dimethylpyrimidi           |                                   |
| n-2-ylcarbamoylsulfamoyl)benzoate |                                   |
+-----------------------------------+-----------------------------------+
| ![](media/image4.j                | ![](media/image5.j                |
| peg){width="1.3472222222222223in" | peg){width="1.5416666666666667in" |
| height="1.375in"}                 | height="1.8194444444444444in"}    |
|                                   |                                   |
| Sulfometuron pyrimidine amine     | Sulfometuron sulfonamide          |
|                                   |                                   |
| IN-X0993; IN-X993; PA             | IN-D5803; SA; methyl              |
|                                   | phenylsulfonamide                 |
| 4,6-Dimethyl-2-pyrimidinamine     |                                   |
|                                   | Methyl 2-(aminosulfonyl)benzoate. |
| 4,6-dimethyl-2-pyrimidinamine     |                                   |
|                                   | 2-(Aminosulfonyl)-benzoic acid,   |
|                                   | methyl ester                      |
+-----------------------------------+-----------------------------------+
| ![](media/image6                  | ![](media/image7.                 |
| .png){width="2.020138888888889in" | jpeg){width="2.688888888888889in" |
| height="1.8694444444444445in"}    | height="1.5583333333333333in"}    |
|                                   |                                   |
| Pyrimidine-ol                     | Sulfometuron free acid            |
|                                   |                                   |
| IN-11859                          | FA-SM; IN-T6385                   |
|                                   |                                   |
| 4,6-Dimethyl-2-pyrimidinol        | 2-\[\[\[\[(4,6                    |
|                                   | -Dimethyl-2-pyrimidinyl)amino\]ca |
|                                   | rbonyl\]amino\]sulfonyl\]-benzoic |
|                                   | acid                              |
+-----------------------------------+-----------------------------------+
| ![](media/image8.                 |                                   |
| wmf){width="1.5868055555555556in" |                                   |
| height="1.875in"}                 |                                   |
|                                   |                                   |
| Free acid Sulfonamide             |                                   |
|                                   |                                   |
| FA-Sulfonamide; Free acid;        |                                   |
| IN-D5119                          |                                   |
|                                   |                                   |
| 2-(Aminosulfonyl)benzoic acid     |                                   |
+-----------------------------------+-----------------------------------+

# APPENDIX 2: Environmental Fate Summary Table

+----------+--------------------------------------------------+--------+
| Table 5. |                                                  |        |
| Key      |                                                  |        |
| results  |                                                  |        |
| of       |                                                  |        |
| sulf     |                                                  |        |
| ometuron |                                                  |        |
| methyl   |                                                  |        |
| envir    |                                                  |        |
| onmental |                                                  |        |
| fates    |                                                  |        |
| studies. |                                                  |        |
+==========+==================================================+========+
| ***Para  | ***Value^1^***                                   | *      |
| meter*** |                                                  | **MRID |
|          |                                                  | (s)*** |
| ***\[G   |                                                  |        |
| uideline |                                                  |        |
| #\]***   |                                                  |        |
+----------+--------------------------------------------------+--------+
| Hy       | **t~½~= 8.8 days (LL)** @ 25 ^o^C, pH 5;         | 42     |
| drolysis |                                                  | 715201 |
|          | **t~½~=139 days (LL)** @ 25 ^o^C, pH 7;          |        |
| \        |                                                  |        |
| [161-1\] | **t~½~= 224 days (LL)** @ 25 ^o^C, pH 9.         |        |
|          |                                                  |        |
|          | **Major degradates (from cleavage of the         |        |
|          | sulfonylurea bridge):**                          |        |
|          |                                                  |        |
|          | Sulfonamide -- only in acidic water              |        |
|          |                                                  |        |
|          | Saccharin -- all pH levels                       |        |
|          |                                                  |        |
|          | Pyrimidine amine -- all pH levels                |        |
+----------+--------------------------------------------------+--------+
| Direct   | **Combined labels results:**                     | 42     |
| ph       |                                                  | 182401 |
| otolysis | **t~½~= 428 days (LL)** @ 24 ^o^C, pH 5;         |        |
| in water |                                                  | 43     |
|          | **t~½~= stable** @ 24 ^o^C, pH 7;                | 174101 |
| \        |                                                  |        |
| [161-2\] | **t~½~= stable** @ 24 ^o^C, pH 9.                |        |
|          |                                                  |        |
|          | (calculated by the difference in degradation     |        |
|          | rates between irradiated and dark controls and   |        |
|          | adjusting for typical light levels on sunny      |        |
|          | days)                                            |        |
|          |                                                  |        |
|          | **Major degradates (irradiated water):**         |        |
|          |                                                  |        |
|          | pH 5: sulfonamide, pyrimidine amine;             |        |
|          |                                                  |        |
|          | pH 7: none;                                      |        |
|          |                                                  |        |
|          | pH 9: none.                                      |        |
+----------+--------------------------------------------------+--------+
| Ph       | **t~½~= 72.1 days (LL)** @ 25 ^o^C,              | 41     |
| otolysis |                                                  | 420601 |
| on soil  | Study duration was 33 days, substantial          |        |
|          | degradation occurred in dark controls and the    |        |
| \        | calculated photolysis half-life represents the   |        |
| [161-3\] | difference in the dissipation rate in the        |        |
|          | irradiated and the dark control samples.         |        |
|          |                                                  |        |
|          | **Major degradates (from cleavage of the         |        |
|          | sulfonylurea bridge):**                          |        |
|          |                                                  |        |
|          | Saccharin reached a maximum of 48.4% of the      |        |
|          | applied at 33 days (study termination.)          |        |
|          |                                                  |        |
|          | Pyrimidine amine reached a maximum of 53.1% at   |        |
|          | 33 days (study termination.)                     |        |
|          |                                                  |        |
|          | There was no substantial difference in the       |        |
|          | degradation pathway of sulfometuron methyl       |        |
|          | between the irradiated- and the dark control     |        |
|          | soil.                                            |        |
|          |                                                  |        |
|          | No other degradate accounted for \>4% of the     |        |
|          | applied radioactivity regardless of whether the  |        |
|          | phenyl ring or the pyrimidine ring was           |        |
|          | ^14^C-labeled.                                   |        |
+----------+--------------------------------------------------+--------+
| Aerobic  | [Study with \[pyrimidine-2-^14^C\] Sulfometuron  | 42     |
| soil     | Methyl]{.underline}                              | 091401 |
| me       |                                                  |        |
| tabolism | **Soil: Keyport Silt loam (pH 6.3, 1.6% O.C.)    |        |
|          | from Delaware**                                  |        |
| \        |                                                  |        |
| [162-1\] | First Order **t~½~**: 57.8 days (LL) (r^2^ =     |        |
|          | 0.9239).                                         |        |
|          |                                                  |        |
|          | Observed DT50: 23 days.                          |        |
|          |                                                  |        |
|          | Observed DT90: 110 days.                         |        |
|          |                                                  |        |
|          | Sterile soil First Order **t~½~**: 364 days (LL) |        |
|          |                                                  |        |
|          | Major transformation products:                   |        |
|          |                                                  |        |
|          | > Pyrimidine amine (maximum 41.0% of the         |        |
|          | > applied)                                       |        |
|          | >                                                |        |
|          | > Pyrimidine-ol (maximum 10.5% of the applied).  |        |
|          |                                                  |        |
|          | CO~2~ (maximum 53.1% of applied).                |        |
|          |                                                  |        |
|          | Minor transformation products:                   |        |
|          |                                                  |        |
|          | > Free acid sulfometuron methyl.                 |        |
|          | >                                                |        |
|          | > Pyrimidine urea.                               |        |
+----------+--------------------------------------------------+--------+
| Aerobic  | [Study with U- ^14^C-phenyl-labeled Sulfometuron | 43     |
| soil     | Methyl]{.underline}                              | 174102 |
| me       |                                                  | and    |
| tabolism | **Soil: Keyport Silt loam (pH 6.4, 1.6 % O.C.)   | 245375 |
|          | from Delaware (0.12 mg a.i./kg).**               |        |
| \        |                                                  |        |
| [162-1\] | First Order **t~½~**: 52.5 days (LL) (r^2^ =     |        |
|          | 0.9239).                                         |        |
|          |                                                  |        |
|          | Observed DT50: 29 days.                          |        |
|          |                                                  |        |
|          | Observed DT90: 162 days.                         |        |
|          |                                                  |        |
|          | Major transformation products:                   |        |
|          |                                                  |        |
|          | > Sulfonamide.                                   |        |
|          | >                                                |        |
|          | > Saccharin.                                     |        |
|          | >                                                |        |
|          | > Free acid sulfonamide plus urea (1.0 mg        |        |
|          | > a.i./Kg only).                                 |        |
|          |                                                  |        |
|          | CO~2~.                                           |        |
|          |                                                  |        |
|          | Minor transformation products:                   |        |
|          |                                                  |        |
|          | > Free acid sulfonamide plus urea (0.12 mg       |        |
|          | > a.i./Kg only)                                  |        |
+----------+--------------------------------------------------+--------+
| A        | Study performed with \[pyrimidine-2-^14^C\]      | 42     |
| naerobic | Sulfometuron Methyl                              | 091402 |
| aquatic  |                                                  | and    |
| me       | **Matrix: Bradenton Pond water-sand sediment.**  | 43     |
| tabolism |                                                  | 188601 |
|          | First Order **t~½~**: 37.4 days (LL) (r^2^ =     |        |
| \        | 0.6125).                                         |        |
| [162-3\] |                                                  |        |
|          | Observed total system DT50: 22 to 61 days        |        |
|          | (inconsistent decline data).                     |        |
|          |                                                  |        |
|          | Observed total system DT90: 102 days.            |        |
|          |                                                  |        |
|          | **Matrix: Landenberg Pond water-sandy loam       |        |
|          | sediment.**                                      |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 17.1 days    |        |
|          | (LL) (r^2^ = 0. 0.6394).                         |        |
|          |                                                  |        |
|          | Observed total system DT50: 6.1 days.            |        |
|          |                                                  |        |
|          | Observed total system DT90: 21.7 days.           |        |
|          |                                                  |        |
|          | Major transformation products (both systems):    |        |
|          |                                                  |        |
|          | > free acid sulfometuron methyl.                 |        |
|          | >                                                |        |
|          | > pyrimidine amine.                              |        |
|          |                                                  |        |
|          | Minor identified transformation products:        |        |
|          |                                                  |        |
|          | > pyrimidine-ol.                                 |        |
|          | >                                                |        |
|          | > CO~2~.                                         |        |
+----------+--------------------------------------------------+--------+
| A        | Study with \[phenyl-U-^14^C\] Sulfometuron       | 4413   |
| naerobic | Methyl                                           | 010-20 |
| aquatic  |                                                  | (1     |
| me       | **Matrix: Pond water-sandy loam sediment from    | 43540) |
| tabolism | Bradenton, Florida.**                            |        |
|          |                                                  |        |
| \        | **(water pH 5.5 . Sediment: pH 5.1; O.C. = 5.9   |        |
| [162-3\] | %).**                                            |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 104 days     |        |
|          | (LL) (r^2^ = 0.4883)\*.                          |        |
|          |                                                  |        |
|          | Observed DT50 in total system: *ca.* 21 days.    |        |
|          |                                                  |        |
|          | Sterile **t~½~**; total system: 44 days (LL)     |        |
|          |                                                  |        |
|          | *\* Based upon limited and inconsistent data.*   |        |
|          |                                                  |        |
|          | **Matrix: Pond water-silt loam sediment from     |        |
|          | Landenberg, Pennsylvania.**                      |        |
|          |                                                  |        |
|          | **(water pH 5.8 . Sediment: pH 5.6; O.C. = 2.1   |        |
|          | %).**                                            |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 87 days (LL) |        |
|          | (r^2^ = 0.3577).                                 |        |
|          |                                                  |        |
|          | Observed DT50 in total system: *ca.* 28 days.    |        |
|          |                                                  |        |
|          | Sterile **t~½~**; total system: 175 days (LL)    |        |
|          |                                                  |        |
|          | **Matrix: Pond water-loam sediment from          |        |
|          | Saskatoon, Canada. (water pH 8.3 . Sediment: pH  |        |
|          | 7.8; O.C. = 0.9 %).**                            |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 77 days (LL) |        |
|          | (r^2^ = 0.5853).                                 |        |
|          |                                                  |        |
|          | Observed DT50 in total system: *ca.* 70 days.    |        |
|          |                                                  |        |
|          | Sterile **t~½~**; total system: 399 days (LL)    |        |
|          |                                                  |        |
|          | **Matrix: Pond water-silt loam sediment from     |        |
|          | Walnut Grove, Tennessee. (water pH 5.5 .         |        |
|          | Sediment: pH 5.1; O.C. = 0.5 %).**               |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 73 days (LL) |        |
|          | (r^2^ = 0.5691).                                 |        |
|          |                                                  |        |
|          | Observed DT50 in total system: *ca.* 28 days.    |        |
|          |                                                  |        |
|          | Sterile **t~½~**; total system: 95 days (LL)     |        |
|          |                                                  |        |
|          | Major transformation products:                   |        |
|          |                                                  |        |
|          | saccharin.                                       |        |
|          |                                                  |        |
|          | free acid sulfonamide.                           |        |
|          |                                                  |        |
|          | Minor identified transformation products:        |        |
|          |                                                  |        |
|          | Methyl-2-aminocarbonyl(aminosulfonyl)benzoate.   |        |
+----------+--------------------------------------------------+--------+
| Aerobic  | Study performed with \[pyrimidine-2-^14^C\]      | 42     |
| aquatic  | Sulfometuron Methyl                              | 091403 |
| me       |                                                  | and    |
| tabolism | **Matrix used: Pond water-silt loam sediment     | 43     |
|          | (****Landenberg, acidic system).**               | 174103 |
| \        |                                                  |        |
| [162-4\] | First Order **t~½~**; total system: 9.2 days     |        |
|          | (LL) (r^2^ = 0.94).                              |        |
|          |                                                  |        |
|          | Observed DT50 in total system: 15 days.          |        |
|          |                                                  |        |
|          | Observed DT90 in total system: 31 days           |        |
|          | (extrapolated).                                  |        |
|          |                                                  |        |
|          | Major transformation products:                   |        |
|          |                                                  |        |
|          | > Pyrimidine amine (pyrimidine label).           |        |
|          | >                                                |        |
|          | > Hydroxymethyl-pyrimidine sulfometuron methyl.  |        |
|          | >                                                |        |
|          | > Free acid sulfonamide (phenyl label).          |        |
|          | >                                                |        |
|          | > Sulfonamide (phenyl label).                    |        |
|          |                                                  |        |
|          | Minor identified transformation products:        |        |
|          |                                                  |        |
|          | > CO~2~.                                         |        |
|          |                                                  |        |
|          | **Matrix used: Pond water-sand sediment          |        |
|          | (Bradenton, alkaline system).**                  |        |
|          |                                                  |        |
|          | First Order **t~½~**; total system: 187.3 days   |        |
|          | (LL) (r^2^ = 0.5713).                            |        |
|          |                                                  |        |
|          | Observed DT50 in total system: \>39 days.        |        |
|          |                                                  |        |
|          | Major transformation products:                   |        |
|          |                                                  |        |
|          | > Pyrimidine amine (pyrimidine label).           |        |
|          | >                                                |        |
|          | > Free acid sulfonamide (phenyl label).          |        |
|          |                                                  |        |
|          | Minor identified transformation products:        |        |
|          |                                                  |        |
|          | > Hydroxymethyl-pyrimidine sulfometuron methyl.  |        |
|          | >                                                |        |
|          | > Sulfonamide (phenyl label).                    |        |
|          | >                                                |        |
|          | > CO~2~.                                         |        |
+----------+--------------------------------------------------+--------+
| Ads      | **[Parent sulfometuron methyl]{.underline}:**    | 42     |
| orption/ |                                                  | 789301 |
|          | Soil type: Chino Sandy loam; pH 7.1, organic     |        |
| De       | carbon 1.0%.                                     |        |
| sorption |                                                  |        |
|          | Adsorption K~d~: 0.35.                           |        |
| (K~d~    |                                                  |        |
| and      | Adsorption K~oc~: 35.                            |        |
|          |                                                  |        |
| *        | Freundlich adsorption K~F~: 0.153.               |        |
| *K~oc~** |                                                  |        |
| in L     | Freundlich adsorption K~Foc~: 14.7.              |        |
| Kg^-1^)  |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | Soil type: Fargo silt loam ; pH 7.7, organic     |        |
|          | carbon 2.6%.                                     |        |
|          |                                                  |        |
|          | Adsorption K~d~: 2.07.                           |        |
|          |                                                  |        |
|          | Adsorption K~oc~: 79.6.                          |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 2.12.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 83.2.              |        |
|          |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | Soil type: Miaka Sand ; pH 7.0, organic carbon   |        |
|          | 0.6%.                                            |        |
|          |                                                  |        |
|          | Adsorption K~d~: Not applicable.                 |        |
|          |                                                  |        |
|          | Adsorption K~oc~: Not applicable.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.508.               |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 87.6.              |        |
|          |                                                  |        |
|          | Soil type: Tama Silt loam ; pH 6.7, organic      |        |
|          | carbon 1.5%.                                     |        |
|          |                                                  |        |
|          | Adsorption K~d~: 0.79.                           |        |
|          |                                                  |        |
|          | Adsorption K~oc~: 52.7.                          |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.974.               |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 67.2.              |        |
|          |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | []{.mark}                                        |        |
+----------+--------------------------------------------------+--------+
| Ads      | [Number range CHAPTER**Pyrimidine                | 42     |
| orption/ | amine**]{.underline}                             | 789301 |
|          |                                                  |        |
| De       | []{.mark}                                        |        |
| sorption |                                                  |        |
|          | Soil type: Chino Sandy loam.                     |        |
| Of       |                                                  |        |
| **[D     | Freundlich adsorption K~F~: 3.3.                 |        |
| egradate |                                                  |        |
| s]{.unde | Freundlich adsorption K~Foc~: 315.               |        |
| rline}** |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | Soil type: Fargo Silt loam.                      |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 3.7.                 |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 145.               |        |
|          |                                                  |        |
|          | Soil type: Miaka Sand.                           |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.17.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 29.4.              |        |
|          |                                                  |        |
|          | Soil type: Tama Silt loam.                       |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 2.9.                 |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 203.               |        |
|          |                                                  |        |
|          | Number range CHAPTER**Results Synopsis:          |        |
|          | \[^14^C\]Saccharin**                             |        |
|          |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | Soil type: Chino Sandy loam.                     |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.11.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 10.5.              |        |
|          |                                                  |        |
|          | []{.mark}                                        |        |
|          |                                                  |        |
|          | Soil type: Fargo silt loam.                      |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.27.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 10.6.              |        |
|          |                                                  |        |
|          | Soil type: Miaka Sand.                           |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.033.               |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 5.73.              |        |
|          |                                                  |        |
|          | Soil type: Tama Silt loam.                       |        |
|          |                                                  |        |
|          | Freundlich adsorption K~F~: 0.13.                |        |
|          |                                                  |        |
|          | Freundlich adsorption K~Foc~: 8.72.              |        |
+----------+--------------------------------------------------+--------+
| Ter      | Greenville, MS silty clay loam soil: pH 6.7,     | N      |
| restrial | 0.6% O.C.                                        | umbers |
| Field/L  |                                                  | 43     |
| ysimeter | Half-life: 49.2 days (LL) (based on 0- to        | 212101 |
|          | 359-day data);                                   | and    |
| Dis      |                                                  | 43     |
| sipation | 12.2 days (LL) (based on 0- to 91-day data).     | 637101 |
| ^2^      |                                                  |        |
|          | DT90: 32 days                                    |        |
|          |                                                  |        |
|          | Major transformation products detected (\>0.01   |        |
|          | ppm):                                            |        |
|          |                                                  |        |
|          | Sulfometuron free acid (SFA)                     |        |
|          |                                                  |        |
|          | Pyrimdine amine (PYA)                            |        |
|          |                                                  |        |
|          | Sulfonamide IN-D5803 (SFN)                       |        |
|          |                                                  |        |
|          | Saccharin IN-581 (SCC)                           |        |
|          |                                                  |        |
|          | Rochelle, IL silty clay loam soil: pH 6.8, 1.0%  |        |
|          | O.C.                                             |        |
|          |                                                  |        |
|          | Half-life: 128 days (based on 0- to 723-day      |        |
|          | data, residues in 0-15 cm depth only);           |        |
|          |                                                  |        |
|          | 14.4 days (based on 0- to 90-day data).          |        |
|          |                                                  |        |
|          | DT90: 35 days                                    |        |
|          |                                                  |        |
|          | Major transformation products detected (\>0.01   |        |
|          | ppm):                                            |        |
|          |                                                  |        |
|          | PYA, SFN, and SCC                                |        |
|          |                                                  |        |
|          | Uvale, TX clay soil: pH 7.9, 1.3% O.C.           |        |
|          |                                                  |        |
|          | Half-life: 53.3 days (LL) (based on 0- to        |        |
|          | 447-day data);                                   |        |
|          |                                                  |        |
|          | 13.0 days (LL) (based on 0- to 90-day data).     |        |
|          |                                                  |        |
|          | DT90: 25 days                                    |        |
|          |                                                  |        |
|          | Major transformation products detected (\>0.01   |        |
|          | ppm):                                            |        |
|          |                                                  |        |
|          | PYA, SFN, and SCC                                |        |
|          |                                                  |        |
|          | Maldera, CA sandy loam soil: pH 7.8, 0.7% O.C.   |        |
|          |                                                  |        |
|          | Half-life: 44.1 days (LL) (based on 0- to        |        |
|          | 420-day data);                                   |        |
|          |                                                  |        |
|          | 22.9 days (LL) (based on 0- to 180-day data).    |        |
|          |                                                  |        |
|          | DT90: 55 days                                    |        |
|          |                                                  |        |
|          | Major transformation products detected (\>0.01   |        |
|          | ppm):                                            |        |
|          |                                                  |        |
|          | PYA, SFN, and SCC                                |        |
+----------+--------------------------------------------------+--------+
| ^1^ LL = |                                                  |        |
| "Log     |                                                  |        |
| -linear" |                                                  |        |
| deg      |                                                  |        |
| radation |                                                  |        |
| rate     |                                                  |        |
| calc     |                                                  |        |
| ulation; |                                                  |        |
| process  |                                                  |        |
| of       |                                                  |        |
| cal      |                                                  |        |
| culating |                                                  |        |
| deg      |                                                  |        |
| radation |                                                  |        |
| rates    |                                                  |        |
| and      |                                                  |        |
| ha       |                                                  |        |
| lf-lives |                                                  |        |
| from     |                                                  |        |
| linear   |                                                  |        |
| re       |                                                  |        |
| gression |                                                  |        |
| of       |                                                  |        |
| log-tra  |                                                  |        |
| nsformed |                                                  |        |
| conce    |                                                  |        |
| ntration |                                                  |        |
| meas     |                                                  |        |
| urements |                                                  |        |
| over     |                                                  |        |
| time.    |                                                  |        |
| This     |                                                  |        |
| provides |                                                  |        |
| a        |                                                  |        |
| fir      |                                                  |        |
| st-order |                                                  |        |
| type of  |                                                  |        |
| mea      |                                                  |        |
| surement |                                                  |        |
| of       |                                                  |        |
| p        |                                                  |        |
| esticide |                                                  |        |
| decline. |                                                  |        |
|          |                                                  |        |
| ^2^ For  |                                                  |        |
| these    |                                                  |        |
| field    |                                                  |        |
| dis      |                                                  |        |
| sipation |                                                  |        |
| studies, |                                                  |        |
| dif      |                                                  |        |
| ferences |                                                  |        |
| between  |                                                  |        |
| ha       |                                                  |        |
| lf-lives |                                                  |        |
| measured |                                                  |        |
| over     |                                                  |        |
| various  |                                                  |        |
| time     |                                                  |        |
| d        |                                                  |        |
| urations |                                                  |        |
| ap       |                                                  |        |
| parently |                                                  |        |
| reflect  |                                                  |        |
| both     |                                                  |        |
| slowing  |                                                  |        |
| of       |                                                  |        |
| deg      |                                                  |        |
| radation |                                                  |        |
| at lower |                                                  |        |
| temp     |                                                  |        |
| eratures |                                                  |        |
| and a    |                                                  |        |
| large    |                                                  |        |
| var      |                                                  |        |
| iability |                                                  |        |
| in       |                                                  |        |
| measured |                                                  |        |
| concent  |                                                  |        |
| rations; |                                                  |        |
| also, a  |                                                  |        |
| 2-com    |                                                  |        |
| partment |                                                  |        |
| deg      |                                                  |        |
| radation |                                                  |        |
| model    |                                                  |        |
| for      |                                                  |        |
| adsorbed |                                                  |        |
| and      |                                                  |        |
| d        |                                                  |        |
| issolved |                                                  |        |
| sulf     |                                                  |        |
| ometuron |                                                  |        |
| is quite |                                                  |        |
| pos      |                                                  |        |
| sibility |                                                  |        |
| more     |                                                  |        |
| app      |                                                  |        |
| ropriate |                                                  |        |
| (little  |                                                  |        |
| dis      |                                                  |        |
| sipation |                                                  |        |
| of the   |                                                  |        |
| r        |                                                  |        |
| emaining |                                                  |        |
| residues |                                                  |        |
| in the   |                                                  |        |
| topsoil  |                                                  |        |
| occurred |                                                  |        |
| during   |                                                  |        |
| the      |                                                  |        |
| second   |                                                  |        |
| year of  |                                                  |        |
| these    |                                                  |        |
| studies, |                                                  |        |
| for      |                                                  |        |
| e        |                                                  |        |
| xample). |                                                  |        |
| A        |                                                  |        |
| 2-com    |                                                  |        |
| partment |                                                  |        |
| model    |                                                  |        |
| was not  |                                                  |        |
| used to  |                                                  |        |
| r        |                                                  |        |
| epresent |                                                  |        |
| dis      |                                                  |        |
| sipation |                                                  |        |
| rate     |                                                  |        |
| here     |                                                  |        |
| because  |                                                  |        |
| the data |                                                  |        |
| are not  |                                                  |        |
| su       |                                                  |        |
| fficient |                                                  |        |
| robust   |                                                  |        |
| (e.g.,   |                                                  |        |
| very     |                                                  |        |
| high     |                                                  |        |
| var      |                                                  |        |
| iability |                                                  |        |
| between  |                                                  |        |
| r        |                                                  |        |
| eplicate |                                                  |        |
| measur   |                                                  |        |
| ements), |                                                  |        |
| the      |                                                  |        |
| effects  |                                                  |        |
| of       |                                                  |        |
| weather  |                                                  |        |
| changes  |                                                  |        |
| on       |                                                  |        |
| deg      |                                                  |        |
| radation |                                                  |        |
| rate     |                                                  |        |
| cannot   |                                                  |        |
| easily   |                                                  |        |
| be       |                                                  |        |
| i        |                                                  |        |
| solated, |                                                  |        |
| and the  |                                                  |        |
| amount   |                                                  |        |
| of       |                                                  |        |
| residues |                                                  |        |
| lost     |                                                  |        |
| through  |                                                  |        |
| dis      |                                                  |        |
| sipation |                                                  |        |
| out of   |                                                  |        |
| the      |                                                  |        |
| topsoil  |                                                  |        |
| also     |                                                  |        |
| cannot   |                                                  |        |
| be       |                                                  |        |
| s        |                                                  |        |
| eparated |                                                  |        |
| from the |                                                  |        |
| amount   |                                                  |        |
| lost to  |                                                  |        |
| degr     |                                                  |        |
| adation. |                                                  |        |
+----------+--------------------------------------------------+--------+

# APPENDIX 3: Modeling Input and Output

## FIRST Modeling Input and Output Files

**[Sulfometuron methyl parent, Single application,
Aerial]{.underline}**.

RUN No. 1 FOR Sulfometuron met ON Forest \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.375( .375) 1 1 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

61.00 2 N/A .00- .00 292.00 292.00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

31.962 14.508

**[Sulfometuron methyl parent, Single application,
Ground]{.underline}**.

RUN No. 3 FOR Sulfometuron met ON Forest - G \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.375( .375) 1 1 35.0 244.0 GROUND( 6.4) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

61.00 2 N/A .00- .00 292.00 292.00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

31.980 14.500

**[Sulfometuron methyl parent, 2 applications, Aerial]{.underline}**.

RUN No. 8 FOR Sulfometuron met ON Forest - A \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.188( .321) 2 30 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

61.00 2 N/A .00- .00 292.00 292.00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

27.573 12.519

**[Sulfometuron methyl parent, 3 applications, 90-day interval,
Aerial]{.underline}**.

RUN No. 10 FOR Sulfometuron met ON Forest - a \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.125( .186) 3 90 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

61.00 2 N/A .00- .00 292.00 292.00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

16.532 7.512

**[Sulfometuron methyl parent, 3 applications, 45-day interval,
Aerial]{.underline}**.

RUN No. 11 FOR Sulfometuron met ON Forest aer \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.125( .245) 3 45 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

61.00 2 N/A .00- .00 292.00 292.00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

389. 9.715

**[Sulfometuron methyl total residues, Single application,
Aerial]{.underline}**.

RUN No. 12 FOR Sulfometuron Tot ON Forest \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.375( .375) 1 1 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

136.00 2 N/A .00- .00 .00 .00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

32.354 21.819

**[Sulfometuron methyl total residues, 2 applications, 30 day interval,
Aerial]{.underline}**.

RUN No. 13 FOR Sulfometuron Tot ON Forest \* INPUT VALUES \*

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

RATE (#/AC) No.APPS & SOIL SOLUBIL APPL TYPE %CROPPED INCORP

ONE(MULT) INTERVAL Koc (PPM ) (%DRIFT) AREA (IN)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

.188( .348) 2 30 35.0 244.0 AERIAL(16.0) 87.0 .0

FIELD AND RESERVOIR HALFLIFE VALUES (DAYS)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

METABOLIC DAYS UNTIL HYDROLYSIS PHOTOLYSIS METABOLIC COMBINED

(FIELD) RAIN/RUNOFF (RESERVOIR) (RES.-EFF) (RESER.) (RESER.)

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

136.00 2 N/A .00- .00 .00 .00

UNTREATED WATER CONC (MICROGRAMS/LITER (PPB)) Ver 1.1.0 JAN 1, 2007

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

PEAK DAY (ACUTE) ANNUAL AVERAGE (CHRONIC)

CONCENTRATION CONCENTRATION

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

30.208 20.375

## SCI-GROW Modeling Input and Output Files

SCIGROW VERSION 2.3

ENVIRONMENTAL FATE AND EFFECTS DIVISION

OFFICE OF PESTICIDE PROGRAMS

U.S. ENVIRONMENTAL PROTECTION AGENCY

SCREENING MODEL

FOR AQUATIC PESTICIDE EXPOSURE

**[Parent Compound]{.underline}:**

SciGrow version 2.3

chemical:Sulfometuron Total Resides

time is 10/31/2007 12:30:46

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

Application Number of Total Use Koc Soil Aerobic

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

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

0.375 1.0 0.375 7.34E+01 55.2

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

groundwater screening cond (ppb) = 3.29E-01

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

**[Total Residues]{.underline}:**

SciGrow version 2.3

chemical:Sulfometuron Total Residues

time is 10/ 4/2007 14:16:15

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

Application Number of Total Use Koc Soil Aerobic

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

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

0.375 1.0 0.375 7.34E+01 136.0

\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\--

groundwater screening cond (ppb) = 1.13E+00

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

[^1]: Weber, J.B., G.G. Wilkersona and C.F. Reinhardt. 2004 Calculating
    pesticide sorption coefficients (Kd) using selected soil properties.
    Chemosphere 55:157--166

[^2]: Battaglin, WA, Furlongb, ET, Burkhardt, MR, Peter, CJ. 2000.
    Occurrence of sulfonylurea, sulfonamide, imidazolinone, and other
    herbicides in rivers, reservoirs and ground water in the Midwestern
    United States. *Sci. Tot. Environ.* 248: 123-133

[^3]: Blomquist, J.D., Denis, J.M., Hetrick, J.A., Jones, R.D., and
    Birchfield, N.B. (2001) Pesticides in selected water-supply
    reservoirs and finished drinking water, 1999-2000; summary of
    results from a pilot monitoring program: U.S. Geological Survey
    Open-File Report 01-0456, 65 p.