5/11/2010 Page of

IN ITIAL REVIEW EXPOSU RE REPORT (IRExR)

Chemical ID: P090038 Reviewer: Delpire

Results Table: Dose, Concentration, and Days Exceeded Results Summary

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air Drinking Water Fish Ingestion

ADR LADD ADR LADD 7Q10 CC=1 PDM Days Exceeded LADD ADR LADD ADR LADD Release activity(ies) 2 ; exposure calculation(s) 3 mg/kg/day mg/kg/day mg/kg/day mg/kg/day μ g/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day MFG/PROC: max acute eco --- --- 1247.69 --- --- --- --- MFG/PROC: max PDM1 --- --- --- --- 323.48 94 --- --- --- --- --- MFG/PROC: max PDM2 --- --- 36.97 190 --- --- USE: max PDM1, ADR, LADD 1650.94 48 7.54E-02 1.65E-03

USE: max PDM2 --- --- --- --- 188.68 242 --- --- --- --- ---
1 Exposure scenario titles consist of release activ ity followed by exposure calculation abbreviation.
2 Release activities are from engineering report's Manufactur ing (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposure scenario if their releases occur at same location.
3 Exposure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution Model (PDM). There may be one, two, or all three exposure calculations per exposure scenario. CC is the aquatic concentration of concern.

Remarks:5/11/2010 Page of

IN ITIAL REVIEW EXPOSU RE REPORT (IRExR)

Summary Table: Endpoints assessed

Endpoints-Assessed Table Reasons for not assessing releases

Endpoints/Assessment Cycles 1 Releases Assessed in NCEM2? No XB Testing Required No Hazard Concern No Releases Release Below Acute Threshold 5 Release Below Chronic Threshold 5 Other

Ingestion Surface water N NA X NA NA Ground water (landfill) N NA X NA Consumer Use: DtD 2 N NA NA NA No Consumer use Inhalation Air: incineration (stack) N NA X X Air: fugitive Y NA Consumer Use: CEM 3 N NA NA NA No Consumer use Dermal Consumer Use: CEM N NA NA NA No Consumer use Eco Surface water: ADR conc and/or PDM 4 Y NA NA NA

Consumer Use: DtD N NA NA NA No Consumer use

1 Assessment cycles are endpoint concentrations and dose calculations within the NCEM2 model.
2 Down-the-Drain Module
3 Consumer Exposure Module
4 Probabilistic Dilution Model
5 The threshold values for assessing endpoints are 1 mg/day for acute doses and 1 mg/year for chronic doses.

Remarks:5/11/2010 Page of

IN ITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090038 Assessor: Delpire

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: MFG/PROC: max acute eco
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: N/A 0.00 0.00
(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr: 0.00/0.00 0.00 0.00

Per Site Release: N/A/0.00 0.00 0.00
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:5/11/2010 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY:MFG/PROC: max
acute eco
SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture
SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

6.75 0.00 1.33

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 2825.61 935.49 634.16 514.20 2.39 7.22 10.64 13.13

ALL 10 50.57 9.38 5.41 4.53 133.48 719.62 1247.69 1490.07

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units
50% 10% 50% 10%

Cancer

LADD pot 5.10E-07 2.85E-05 mg/kg/day 2.91E-09 1.63E-07 mg/kg/day

LADC pot 2.62E-05 1.46E-03 mg/L 3.48E-05 1.95E-03 mg/kg

Acute

ADR pot 6.03E-04 6.01E-02 mg/kg/day 5.71E-06 3.19E-04 mg/kg/day

SIC Code Comments:5/11/2010 Page of

IN ITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090038 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: . Release Activity: MFG/PROC: max PDM1
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: N/A 0.00 0.00
(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr: 0.00/0.00 0.00 0.00

Per Site Release: N/A/0.00 0.00 0.00
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:5/11/2010 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY:MFG/PROC: max PDM1
SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture
SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

. 1.75 0.00 1.33

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 2825.61 935.49 634.16 514.20 0.62 1.87 2.76 3.40

ALL 10 50.57 9.38 5.41 4.53 34.61 186.57 323.48 386.31

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units
50% 10% 50% 10%

Cancer

LADD pot 1.27E-06 7.10E-05 mg/kg/day 7.24E-09 4.05E-07 mg/kg/day

LADC pot 6.52E-05 3.64E-03 mg/L 8.67E-05 4.84E-03 mg/kg

Acute

ADR pot 1.56E-04 1.56E-02 mg/kg/day 1.48E-06 8.27E-05 mg/kg/day

SIC Code Comments:5/11/2010 Page of

IN ITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: MFG/PROC: max PDM1
SIC CODE DESCRIPTION: Orga nic Chemicals Manufacture
ASSOCIATED SIC CODES: 2865,2869

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

1.00 26 94 High

Remarks: COC exceeded for > 20 days.5/11/2010 Page of

IN ITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090038 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: . Release Activity: MFG/PROC: max PDM2
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: N/A 0.00 0.00
(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr: 0.00/0.00 0.00 0.00

Per Site Release: N/A/0.00 0.00 0.00
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:5/11/2010 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY:MFG/PROC: max PDM2
SIC-CODE DESCRIPTION: Orga nic Chemicals Manufacture
SIC-CODE (S): 2865,2869 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

0.20 0.00 1.33

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 2825.61 935.49 634.16 514.20 7.08E-02 0.21 0.32 0.39

ALL 10 50.57 9.38 5.41 4.53 3.95 21.32 36.97 44.15

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units
50% 10% 50% 10%

Cancer

LADD pot 3.78E-07 2.11E-05 mg/kg/day 2.16E-09 1.20E-07 mg/kg/day

LADC pot 1.94E-05 1.08E-03 mg/L 2.58E-05 1.44E-03 mg/kg

Acute

ADR pot 1.79E-05 1.78E-03 mg/kg/day 1.69E-07 9.45E-06 mg/kg/day

SIC Code Comments:5/11/2010 Page of

IN ITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 RELEASE ACTIVITY: MFG/PROC: max PDM2
SIC CODE DESCRIPTION: Orga nic Chemicals Manufacture
ASSOCIATED SIC CODES: 2865,2869

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

1.00 52 190 High

Remarks: COC exceeded for > 20 days.5/11/2010 Page of

IN ITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090038 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: . Release Activity: USE: max PDM1, max ADR, LADD
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: N/A
(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr: 0.00/0.00

Per Site Release: N/A/0.00
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:5/11/2010 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 Number of Sites: RELEASE ACTIVITY:USE: max PDM1, max ADR, LADD

SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

1.75 0.00 1.33

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 13.94 39.75 65.30 77.67

ALL 10 11.11 1.94 1.06 0.96 157.52 902.06 1650.94 1822.92

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units
50% 10% 50% 10%

Cancer

LADD pot 1.43E-05 1.62E-04 mg/kg/day 8.15E-08 9.21E-07 mg/kg/day

LADC pot 7.33E-04 8.29E-03 mg/L 9.75E-04 1.10E-02 mg/kg

Acute

ADR pot 3.32E-03 7.54E-02 mg/kg/day 3.33E-05 3.76E-04 mg/kg/day

SIC Code Comments:5/11/2010 Page of

IN ITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 RELEASE ACTIVITY: USE: max PDM1, max ADR, LADD

SIC CODE DESCRI PTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

1.00 13 48 High

Remarks: COC exceeded for > 20 days.5/11/2010 Page of

IN ITIAL EXPOSURE REVIEW REPORT Chemical ID: P090038

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 4 RELEASE ACTIVITY:USE: max PDM1, max ADR, LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Number of Sites:

. Per Site Fugitive Release: kg/site/day
Fugitive Release Days per Year: days
% Removal via Fugitive Release: %
Total Fugitive Release: kg/yr
Max Annual Average Air Concentration (Fugitive): 22.50 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 410.00 μg/m 3

Per Site Stack Release: kg/site/day
Stack Release Days per Year: days

% Removal via Stack Release: %

Total Stack Release: kg/yr
Max Annual Average Air Concen tration (Stack): 6.02E-03 μg/m 3

Max 24 Hour Average Air Concentration (Stack): 0.23 μg/m 3

ASSUMPTIONS
Exposure Units Results (Stack) Results (Fugitive) ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 1.65E-03 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 9.00E-03 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) N/A 7.54E-02 NA 1 day 71.80 0.55

Inhalation Comments:5/11/2010 Page of

Stack Parameter Data Fugitive Parameter Data Stack Height 10.00 m Release Height: 3.00 m

Inside Stack Diameter: 0.10 m Length of Release Opening: 10.00 m

Stack Gas Exit Velocity: 0.10 m/sec Width of Release Opening: 10.00 m

Stack Gas Temperature: 293.00 K

Meteorological and Terrain Information:

Surrounding Land Use: Rural
Terrain Height: 0.00 m

Distance to Residence of Interest: 100.00 m Meteorological Class: Full
Stability Class: NA
Wind Speed: NA

Downwash Information:

Facility Length: NA m Facility Width: NA m Facility Height: NA m5/11/2010 Page of

IN ITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090038 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: Release Activity: USE: max PDM2
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: N/A 0.00 0.00
(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge
Release Days/yr: 0.00/0.00 0.00 0.00

Per Site Release: N/A/0.00 0.00 0.00
(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:5/11/2010 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 5 Number of Sites: RELEASE ACTIVITY:USE: max PDM2

SIC-CODE DESCRIPTION: POTW's (All facilities)
SIC-CODE (S): 4952 EX POSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg)

0.20 0.00 1.33

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 1.59 4.54 7.46 8.88

ALL 10 11.11 1.94 1.06 0.96 18.00 103.09 188.68 208.33

DRINKING WATER AND FISH IN GESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion

Units
50% 10% 50% 10%

Cancer

LADD pot 8.51E-06 9.62E-05 mg/kg/day 4.85E-08 5.48E-07 mg/kg/day

LADC pot 4.36E-04 4.93E-03 mg/L 5.80E-04 6.56E-03 mg/kg

Acute

ADR pot 3.80E-04 8.61E-03 mg/kg/day 3.81E-06 4.30E-05 mg/kg/day

SIC Code Comments:5/11/2010 Page of

IN ITIAL REVIEW EX POSURE REPORT

Chemical ID: P090038

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 5 RELEASE ACTIVITY: USE: max PDM2

SIC CODE DESCRI PTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

SIC CODE RESULTS

COC ( μ g/L) Percent of Year COC Exceeded Number of Days COC Exceeded Release days/year Loading (kg/site/day) Waste Water Treatment (%) High/Avg Analysis

1.00 66 242 High Remarks: COC exceeded for > 20 days.5/11/2010 Page of



## LEGEND FOR NEW CHEMICAL S EXPOSURE REPORT

This new chemicals exposure report wa s prepared by the Exposure Assessment Branch (EAB) of the Economics, Exposure and Technology Division, Office of Pollution Prevention and Toxics, USEPA.

The goals of these reports are to calcula te conservative (protective) estimates of exposure endpoints for consumers, the general population, and the environment.

For each exposure scenario to industrial releases, the following three endpoints are calculated: (1) maximum possible acute concentrations and doses (2) maximum possible chronic concentrations and doses (3) for water releases ≥ 20 days, the probability of exceedence of the aquatic concentration of concern These endpoints are identified by abbreviati ons on the Release Activity line, e.g., (1) max ADR , (2) max LADD , (3) max PDM . Depending on the release inputs, these e ndpoints may be calculated and presented on the same page or different pages. That is, a release activity ID of mfg; max ADR, max PDM, max LADD indicates that all the exposure endpoints were cal culated from common manufacturing release values; conversely, a release activity ID of mfg &proc; max ADR indicates that only the maximum acute exposure values were calculated for manufacturing and proce ssing releases that occurred at the same site.

For each consumer product use exposure scenario, whether exposure is to the user directly or to the general population/environment, the maximum exposure values are calculated and presented together.

In addition to the exposure values above, EPA policy dir ects that exposure and release values be compared to criteria threshold values for Exposure-based and PBT Exposure-based cases.

Exposure-based (YX) cases (those with ≥ 100,000 kg/yr production volume) Criteria are exceeded under the following conditions: Presence in consumer product with likely exposure ≥ 3E-3 mg/kg/d exposure via air, fish ingestion or drinking water ≥ 10,000 kg/yr release to environment (post-treatment) ≥ 1,000 kg/yr release to water (post-treatment)

Persistent, Bioaccumulative, Toxic (PBT) chemical s of P2B2 rating or hi gher and production volume ≥ 20,000 kg/yr Criteria are exceeded as for YX cases, with the following differences: ≥ 2,000 kg/yr release to environment (post-treatment) ≥ 200 kg/yr release to water (post-treatment)

Bolding rules in the Report: Values for endpoints above th at are also health or eco concerns are bolded.