12/15/08 Page of

INITIAL REVIEW EXPOSU RE REPORT (IRExR)

Chemical ID: P090004 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: max ADR

MFG: max LADD

USE: max PDM1,

ADR USE: max PDM2,

LADD

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:

Fate test recommendations: None Exposure Based Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Water Do se (mg/kg/day) N/A No Fish Ingestion Dose (mg/kg/day) N/A No Inhalation Dose (mg/kg/day) N/A No Groundwater Dose (mg/kg/day) N/A No Surface Water Release After Treatment (kg/yr) N/A No Total Release After Treatment (kg/yr) N/A No12/15/08 Page of

INITIAL 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 Ground water (landfill) N NA X

Consumer Use: DtD 2 N NA

Inhalation Air: incineration (stack) N NA Air: fugitive N NA

Consumer Use: CEM 3 N NA

Dermal

Consumer Use: CEM N NA

Eco

Surface water: ADR
conc and/or PDM 4 Y NA

Consumer Use: DtD N NA

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:12/15/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090004 Assessor: Delpire

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites:

Release Activity: MFG: max ADR

Release Description: WATER LANDFILL

Non-sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge

Release Days/yr:

Per Site Release:

(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:12/15/08 Page of

INITIAL EXPOSURE REVIEW REPORT

Chemical ID: P090004

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY:MFG: max ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

ASSUMPTIONS

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

Cancer

LADD pot (mg/kg/day) 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 30 .00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) NA 1 day 71.80 0.55

Inhalation Comments:12/15/08 Page of

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 m Release Height: N/A

Inside Stack

Diameter: 0.10 m Length of Release Opening: N/A

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

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 m12/15/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090004 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites:

Release Activity: MFG: max LADD

Release Description: WATER LANDFILL

Non-sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge

Release Days/yr:

Per Site Release:

(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:12/15/08 Page of

INITIAL EXPOSURE REVIEW REPORT

Chemical ID: P090004

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY:MFG: max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

ASSUMPTIONS

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

Cancer

LADD pot (mg/kg/day) 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 30 .00 75.00 NA NA

Acute

ADR pot

(mg/kg/day)

Inhalation Comments:12/15/08 Page of

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 m Release Height: N/A

Inside Stack

Diameter: 0.10 m Length of Release Opening: N/A

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

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 m12/15/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090004 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites:

Release Activity: USE: max PDM1, ADR

Release Description: WATER LANDFILL

Non-sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge

Release Days/yr:

Per Site Release:

(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:12/15/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090004

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

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY:USE: max PDM1, ADR

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)

0.00

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

ALL 10 11.11 1.94 1.06 0.96

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 mg/kg/day mg/kg/day

LADC pot mg/L mg/kg

Acute

ADR pot mg/kg/day mg/kg/day

SIC Code Comments:12/15/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090004

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 RELEASE ACTIVITY: USE: max PDM1, ADR

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 High

Remarks: COC exceeded for > 20 days.12/15/08 Page of

INITIAL EXPOSURE REVIEW REPORT

Chemical ID: P090004

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 3 RELEASE ACTIVITY:USE: max PDM1, ADR

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

ASSUMPTIONS

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

Cancer

LADD pot (mg/kg/day) 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 30 .00 75.00 NA NA

Acute

ADR pot

(mg/kg/day) NA 1 day 71.80 0.55

Inhalation Comments:12/15/08 Page of

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 m Release Height: N/A

Inside Stack

Diameter: 0.10 m Length of Release Opening: N/A

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

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 m12/15/08 Page of

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P090004 Assessor:

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites:

Release Activity: USE: max PDM2, LADD

Release Description: WATER LANDFILL

Non-sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge

Release Days/yr:

Per Site Release:

(kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:12/15/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090004

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

SCENARIO #: 4 Number of Sites: RELEASE ACTIVITY:USE: max PDM2, 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)

0.00

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

ALL 10 11.11 1.94 1.06 0.96

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 mg/kg/day mg/kg/day

LADC pot mg/L mg/kg

Acute

ADR pot mg/kg/day mg/kg/day

SIC Code Comments:12/15/08 Page of

INITIAL REVIEW EX POSURE REPORT

Chemical ID: P090004

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 RELEASE ACTIVITY : USE: max PDM2, 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 High

Remarks: COC exceeded for > 20 days.12/15/08 Page of

INITIAL EXPOSURE REVIEW REPORT

Chemical ID: P090004

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 4 RELEASE ACTIVITY:USE: max PDM2, LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

ASSUMPTIONS

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

Cancer

LADD pot (mg/kg/day) 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) 30 .00 75.00 NA NA

Acute

ADR pot

(mg/kg/day)

Inhalation Comments:12/15/08 Page of

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 m Release Height: N/A

Inside Stack

Diameter: 0.10 m Length of Release Opening: N/A

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

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 m12/15/08 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.