11/24/2010 Page 1 of 9



### INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P -11- 0060 Reviewer: Cinalli/BC

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

Exposure

Scenario 1 Water Land fill Stack Air Fugitive Air

Drinking Water Fish Ingestion

ADR LADD ADR LADD 7Q10 4

CC =

61 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 μg/l # Days mg/kg/day mg/kg/day m g/kg/day mg/kg/day mg/kg/day

max

acute eco --- --- --- --- 7.74E+02

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

PDM1

--- --- --- --- 7.74E+02

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

PDM2

--- --- --- --- 1.89E+02

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

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation.

2 Release activities are from engineering report's Manufacturing (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 t he

aquatic concentration of concern.

4 This column displays concentration values for the 7Q10 streamflow, which is defined as the average daily

streamflow of the seven consecutive days of lowest flow within a ten year period.

Remarks:11/24/2010 Page 2 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060 Assessor: Cinalli/BC

ENVIRONMENTAL RELEASES

Scenario#: 1 Number of Release Sites:

Release Activity: 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/da y)

Remarks:11/24/2010 Page 3 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY: Max

ADR

SIC

- CODE DESCRIPTION: POTW's (Al l facilities)

SIC

- CODE (S): 4952 EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

AQUATIC EXPOSURE EST IMATES

- SURFACE WATER

PLANT

TYPE % ILE

FACILITY STREAM FLOW (MLD) STREAM CONC. (μg/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic

Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 6.53 18.63 30.60 36.40

ALL 10 11.11 1.94 1.06 0.96 73.81 422.68 773 .58 854.17

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 3.35E

- 06 3.79E

- 05 mg/kg/day 0.00 0.00 mg/kg/d ay

LADC pot 1.72E

- 04 1.94E

- 03 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.56E

- 03 3.53E

- 02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:11/24/2010 Page 4 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060 Assessor: Cinalli/BC

ENVIRONMENTAL RELEASES

Sce nario#: 2 Number of Release Sites:

Release Activity: PDM1

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:11/24/2010 Page 5 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY

PDM1

SIC

- CODE DESCRIPTION: POTW's (All facilities)

SIC

- CODE (S): 4952 EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMEN T

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

FACILITY STREAM FLOW (MLD) STREAM CONC. (μg/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic

Mean 30Q5 7Q10 1Q10

ALL 50 125.56 44.02 26.80 22.53 6.53 18.63 30.60 36.40

ALL 10 11.11 1.94 1.06 0.96 73.81 422.68 773.58 854.17

DRINKING WATER AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking

Water Units Fish Ingestion Results Fish

Ingestion

Units

50% 10% 50% 10%

Cancer

LADD pot 3.35E

- 06 3.79E

- 05 mg/kg/day 0.00 0.00 mg/kg/day

LADC pot 1.72E

- 04 1.94E

- 03 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 1.56E

- 03 3.53E

- 02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:11/24/2010 Page 6 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 11

- 0060

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 2 RELEASE ACTIVITY: : PDM1

SIC CODE DESCRIPTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

Exceeded Number of

Days COC

Exceeded Release

days/year Loading

(kg/site/day) Waste Water

Treatment (%) High/Avg

Analysis

61.00 Hig h11/24/2010 Page 7 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060 Assessor: Cinalli/BC

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites:

Release Activity: PDM2

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/s ite/day) (kg/site/day)

Remarks:11/24/2010 Page 8 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID : P- 11

- 0060

SIC

- CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 3 Number of Sites: RELEASE ACTIVITY

PDM2

SIC

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

SIC

- CODE (S): 4952 EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 0.00

AQU ATIC EXPOSURE ESTIMATES

- SURFACE WATER

PLANT

TYPE % ILE

FACILITY STREAM FLOW (MLD) STREAM CONC. (μg/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 INGESTION 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 0.0 0 0.00 mg/kg/day

LADC pot 4.36E

- 04 4.93E

- 03 mg/L 0.00 0.00 mg/kg

Acute

ADR pot 3.80E

- 04 8.61E

- 03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:11/24/2010 Page 9 of 9

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P- 11

- 0060

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO # : 3 RELEASE ACTIVITY: : PDM2

SIC CODE DESCRIPTION: POTW's (All facilities)

ASSOCIATED SIC CODES: 4952

SIC CODE RESULTS

COC (μg/L) Percent of

Year COC

Exceeded Number of

Days COC

Exceeded Release

days/year Loading

(kg/site /day) Waste Water

Treatment (%) High/Avg

Analysis

61.00 High