8/21/13 page of



### POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Reviewer: Tobias/SS
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 4
CC = 1 PDM Days Exceede d LADD ADR LADD ADR LADD

Release activity(ies) 2 ; exposure calculation(s) 3 mg/kg/day m g/kg/day mg/kg/day mg/kg/day μg/l # Days mg/kg/day m g/kg/day mg/kg/day m g/kg/day mg/kg/day

PROC: max ADR,
max acute eco --- --- 8.49E-03 --- 8.50E-01 --- --- --- --- --- ---

PROC: PDM1 --- --- --- --- 8.50E-01 --- --- --- --- --- --- PROC: Max LADD --- --- --- 5 .15E-05 --- --- --- --- --- --- --- USE: max ADR, max
acute eco --- --- 1.32E-02 --- 1.32E+00 --- --- --- --- --- ---

USE: PDM1 --- --- --- --- 1.32E+00 --- --- --- --- --- --- USE: Max LADD --- --- --- 5 .04E-06 --- --- --- --- --- --- --- 1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manuf acturing (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 (A DR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution Model (PDM). Th ere may be one, two, or all three exposure calculations per exposure scenario.CC is the aquatic concentration of concern. 4 This column displays concentration values for the 7Q 10 streamflow, which is defined as the average daily streamflow of the seven consecutive days of lowest flow within a ten year period.

Remarks:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: Release Activity: PROC: Max ADR
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 1 RELEASE ACTIVITY: PROC: Max ADR FACILITY NAME: FACILITY LOCATION: RECEIVING WATER REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 0.85 CHRONIC SCENARIO 0.85

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.15E-05 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 0.62 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 8.49E-03 NA 1 day 71.80 129.00 Lakes Comments:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

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

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 2 RELEASE ACTIVITY: PROC: PDM1 FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 0.85 CHRONIC SCENARIO 0.85

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.15E-05 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 0.62 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 8.49E-03 NA 1 day 71.80 129.00 Lakes Comments:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

Scenario#:3 Number of Release Sites: Release Activity: PROC: Max LADD
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 3 RELEASE ACTIVITY: PROC: Max LADD FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 101.33 CHRONIC SCENARIO 101.33

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.15E-05 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 0.62 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) N/A NA 1 day 71.80 129.00 Lakes Comments:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

Scenario#:4 Number of Release Sites: Release Activity: USE: Max ADR
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 4 RELEASE ACTIVITY: USE: Max ADR FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 1.32 CHRONIC SCENARIO 0.33

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.04E-06 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 6.03E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.32E-02 NA 1 day 71.80 129.00 Lakes Comments:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: Release Activity: USE: PDM1
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 5 RELEASE ACTIVITY: USE: PDM1 FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 1.32 CHRONIC SCENARIO 0.33

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.04E-06 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 6.03E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) 1.32E-02 NA 1 day 71.80 129.00 Lakes Comments:8/21/13 page of

POST FOCUS EXPOSURE REPORT

Chemical ID: P-13-0270 Assessor: Tobias/SS

ENVIRONMENTAL RELEASES

Scenario#:6 Number of Release Sites: Release Activity: USE: Max LADD
Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: (k g/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:8/21/13 page of

POST FOCUS EXPOSURE REPORT

CHEMICAL ID: P-13-0270

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES: LAKES, BAYS, ESTUARIES, AND OCEANS
SCENARIO #: 6 RELEASE ACTIVITY: USE: Max LADD FACILITY NAME: FACILITY LOCATION: RECEIVING WATER NAME: REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PLANT FLOW (MLD) PRETREAT RELEASE (kg/site/day) POST-TREAT RELEASE (kg/site/day) BCF (L/kg)

5550.00

AQUATIC EXPOSURE ESTIMATES MIXING ZONE DILUTION FACTOR WATER CONCENTRATION (ug/L) ACUTE SCENARIO 39.63 CHRONIC SCENARIO 9.91

FISH INGESTION EXPOSURE ESTIMATES ASSUMPTIONS Exposure Units Results ED (years) AT (years) BW (kg) IR (g/day) Cancer LADD pot (mg/kg/day) 5.04E-06 30.00 75.00 71.80 6.00 LADC pot (mg/kg) 6.03E-02 30.00 75.00 NA NA Acute ADR pot

(mg/kg/day) N/A NA 1 day 71.80 129.00 Lakes Comments: