4/24/2013 Page 1 of 116



### Chemical ID: P-11-0487 Review er: Flessner/SD
REVISED STANDARD REVIEW EXPOSURE REPORT

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 = 1000 PDM Days Exceede d 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 mg/kg/day mg/kg/day mg/kg/day

Max ADR 4.97E-03 --- --- - -- 101.8 --- - -- 3.38E-04 --- - -- ---

Max LADD --- --- --- --- --- --- --- --- 1.08E-07 --- ---

PDM1 --- --- --- --- 6.44 --- --- --- --- ---

Max ADR: max acut e eco 2.65E-02 --- --- - -- 543.81 --- - -- 4.25E-03 --- - -- ---

Max LADD --- 1 .13E-05 --- --- --- --- 7 .65E-06 --- 3.52E-06 --- ---

PDM1 --- --- --- --- 6.44 --- --- --- --- ---

Max ADR:
ma x acute eco 2.62E-02 --- --- --- 5.74E+02 --- --- 2.22E-05 --- --- ---

Max LADD --- 4 .68E-06 --- --- --- --- 4 .24E-08 --- 1.96E-08 --- --- Max ADR:
ma x acute eco 1.82E-04 --- --- --- 3.74E+00 --- --- 3.58E-05 --- --- ---

Max LADD --- 1 .56E-08 --- --- --- --- 1 .71E-08 --- 7.87E-09 --- --- Max ADR: ma x acute eco 9.02E-02 --- --- --- 2.02E+03 --- --- --- --- --- ---

Max LADD --- 2.60E-06 --- --- --- --- --- --- --- --- ---

Max ADR:
ma x acute eco 9.48E-04 --- --- --- 2.08E+01 --- --- 2.72E-05 --- --- ---

Max LADD --- 4 .23E-08 --- --- --- --- 1 .30E-08 --- 5.97E-09 --- --- Max ADR: ma x acute eco 6.93E-02 --- --- --- 1.55E+03 --- --- --- --- --- ---

Max LADD --- 2.00E-06 --- --- --- --- --- --- --- --- ---

Max ADR:
ma x acute eco 3.15E-02 --- --- --- 6.46E+02 --- --- 1.24E-05 --- --- ---4/24/2013 Page 2 of 116

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air Drinking Water Fish Ingestion ADR LADD ADR LADD 7Q10 4 CC = 1000 PDM Days Exceede d LADD ADR LADD ADR LADD

PDM1 --- --- --- --- 6.46E+02 --- --- --- --- --- Max LADD --- 5 .41E-05 --- --- --- --- 1 .18E-07 --- 5.43E-08 --- --- Max ADR: max acut e eco 2.33E-02 --- --- --- 4.78E+02 --- --- 9.16E-06 --- --- ---

Max LADD --- 4 .00E-06 --- --- --- --- 8 .72E-09 --- 4.02E-09 --- --- Max ADR: max acut e eco 2.44E-02 --- --- --- 5.35E+02 --- --- 2.11E-05 --- --- ---

Max LADD --- 3 .27E-06 --- --- --- --- 3 .00E-08 --- 1.38E-08 --- ---

Max ADR: max acut e eco 6.22E-03 --- --- --- 1.28E+02 --- --- 6.10E-01 --- --- ---

Max LADD --- 5 .34E-07 --- --- --- --- 2 .89E-04 --- 1.33E-04 --- --- Max ADR: max acut e eco 8.80E-03 --- --- --- 1.80E+02 --- --- 8.80E-01 --- --- ---

Max LADD --- 7 .55E-07 --- --- --- --- 4 .19E-04 --- 1.93E-04 --- Max ADR; max acut e eco 3.58E-03 --- --- --- 78.30 --- --- 2.21E-03 --- --- ---

Max LADD --- 1 .60E-07 --- --- --- --- 1 .05E-06 --- 4.84E-07 --- --- 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. 

### Results Table: Exposure Based (X B)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value Drinking (Surface) Wate r Dose (mg/kg/day) NA No Fish Ingestion Dose (mg/kg/day) NA No Inhalation Dose (mg/kg/day) NA No Groundwater Dose (mg/kg/day) NA No Surface Water Release After Treatment (kg/yr) Total Release After Treatment (kg/yr) Consumer Use? No



### Fate test recommendations:4/24/2013 Page 3 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
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/day)

Remarks:4/24/2013 Page 4 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 1 Number of S ites: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 2.74 6.38 10.10 11.96
ALL 10 39.60 13.29 7.76 7.57 19.95 59.44 101.80 104.36

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 5.28E-07 3.84E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.71E-05 1.97E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 5.33E-04 4.97E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 5 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 1 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 1.01E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 1.84 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 7.43E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 4.04E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 3.38E-04 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 6 of 116

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 m4/24/2013 Page 7 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#: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:4/24/2013 Page 8 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 2 Number of S ites: RELEASE ACTIVITY: PDM1 SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 0.17 0.40 0.64 0.76
ALL 10 39.60 13.29 7.76 7.57 1.26 3.76 6.44 6.61

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 8.90E-08 6.48E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.57E-06 3.32E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.37E-05 3.14E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 9 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 2 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)
ASSOCIATED SIC CODES: Subset of 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

1000.00 High4/24/2013 Page 10 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:3 Number of Release Sites: Release Activity: 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:4/24/2013 Page 11 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 3 Number of S ites: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 5.83E-07 4.24E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.99E-05 2.18E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 12 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 3 RELEASE ACTIVI TY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 1.47E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.08E-07 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 5.88E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 13 of 116

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 m4/24/2013 Page 14 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:4 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/day)

Remarks:4/24/2013 Page 15 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 4 Number of S ites: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 14.65 34.08 53.98 63.89
ALL 10 39.60 13.29 7.76 7.57 106.57 317.53 543.81 557.46

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 9.39E-07 6.83E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.82E-05 3.50E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 2.85E-03 2.65E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 16 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 4 RELEASE ACTI VITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 3.80E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 23.10 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 2.79E-06 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.52E-05 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 4.25E-03 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 17 of 116

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 m4/24/2013 Page 18 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:5 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:4/24/2013 Page 19 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 5 Number of S ites: RELEASE ACTIVITY: PDM1 SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 0.17 0.40 0.64 0.76
ALL 10 39.60 13.29 7.76 7.57 1.26 3.76 6.44 6.61

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 8.90E-08 6.48E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.57E-06 3.32E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.37E-05 3.14E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 20 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 5 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)
ASSOCIATED SIC CODES: Subset of 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

1000.00 High4/24/2013 Page 21 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:6 Number of Release Sites: Release Activity: 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:4/24/2013 Page 22 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 6 Number of S ites: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 1.55E-06 1.13E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 7.93E-05 5.77E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 23 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 6 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 7.65E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 3.92E-04 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 24 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 6 RELEASE ACTI VITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 4.79E-02 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 3.52E-06 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.92E-05 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 25 of 116

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 m4/24/2013 Page 26 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:7 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/day)

Remarks:4/24/2013 Page 27 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 7 Number of Sites: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: 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

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 4.84 13.81 22.69 26.99
ALL 10 11.11 1.94 1.06 0.96 54.73 313.40 573.58 633.33

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 4.14E-07 4.68E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.12E-05 2.40E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.15E-03 2.62E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 28 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:8 Number of Release Sites: Release Activity: 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:4/24/2013 Page 29 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 8 Number of Sites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 4.14E-07 4.68E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.12E-05 2.40E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 30 of 116

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 8 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 4.24E-08 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.17E-06 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 31 of 116

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 8 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 2.66E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.96E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.06E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 32 of 116

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 m4/24/2013 Page 33 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:9 Number of Release Sites: Release Activity: 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:4/24/2013 Page 34 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 9 Number of Sites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 4.14E-07 4.68E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.12E-05 2.40E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 35 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:10 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/day)

Remarks:4/24/2013 Page 36 of 116

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 10 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 2.66E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.12 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.96E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.06E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 2.22E-05 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 37 of 116

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 m4/24/2013 Page 38 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:11 Number of Release Sites: Release Activity: 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:4/24/2013 Page 39 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 11 Number of Sites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 4.14E-07 4.68E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.12E-05 2.40E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 40 of 116

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:12 Number of Release Sites: Release Activity: 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:4/24/2013 Page 41 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 12 Number of Sites: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 2.15E-09 1.56E-08 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.10E-07 8.03E-07 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 42 of 116

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 12 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.71E-08 30.00 75.00 71.80 1.40 LADC pot (mg/L) 8.76E-07 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 43 of 116

INITIAL REVIEW EX POSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 12 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 1.07E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 7.87E-09 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 4.28E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 44 of 116

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 m4/24/2013 Page 45 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:13 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/day)

Remarks:4/24/2013 Page 46 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 13 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION:
SIC-CODE 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 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 3.53 9.52 15.18 18.43
ALL 10 121.64 1079.55 2021.28 2021.28

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 7.55E-08 2.60E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.87E-06 1.33E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 7.96E-04 9.02E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 47 of 116

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:14 Number of Release Sites: Release Activity: 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:4/24/2013 Page 48 of 116

INITIAL REVIEW EX POSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 14 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION:
SIC-CODE 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 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 N/A N/A N/A N/A
ALL 10 N/A N/A N/A N/A

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 7.55E-08 2.60E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.87E-06 1.33E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 49 of 116

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:15 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/day)

Remarks:4/24/2013 Page 50 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 15 Number of Site s: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: 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

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 0.18 0.50 0.82 0.98
ALL 10 11.11 1.94 1.06 0.96 1.98 11.34 20.75 22.92

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 3.74E-09 4.23E-08 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.92E-07 2.17E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 4.18E-05 9.48E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 51 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 15 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 8.12E-05 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.15 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 5.97E-09 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 3.25E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 2.72E-05 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 52 of 116

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 m4/24/2013 Page 53 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:16 Number of Release Sites: Release Activity: 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:4/24/2013 Page 54 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 16 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 3.74E-09 4.23E-08 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.92E-07 2.17E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 55 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 16 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.30E-08 30.00 75.00 71.80 1.40 LADC pot (mg/L) 6.64E-07 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 56 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 16 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 8.12E-05 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 5.97E-09 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 3.25E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 57 of 116

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 m4/24/2013 Page 58 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:17 Number of Release Sites: Release Activity: 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:4/24/2013 Page 59 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 17 Number of Site s: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: SIC-CODE (S): 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 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 N/A N/A N/A N/A
ALL 10 N/A N/A N/A N/A

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 5.80E-08 2.00E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.98E-06 1.02E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 60 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:18 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/day)

Remarks:4/24/2013 Page 61 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 18 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 17.40 40.46 64.08 75.85
ALL 10 39.60 13.29 7.76 7.57 126.52 376.98 645.62 661.82

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 7.43E-06 5.41E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.81E-04 2.77E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.38E-03 3.15E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 62 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 18 RELEASE AC TIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 7.38E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 6.74E-02 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 5.43E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.95E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 1.24E-05 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 63 of 116

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 m4/24/2013 Page 64 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:19 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:4/24/2013 Page 65 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 19 Number of Site s: RELEASE ACTIVITY: PDM1 SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 17.40 40.46 64.08 75.85
ALL 10 39.60 13.29 7.76 7.57 126.52 376.98 645.62 661.82

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 7.43E-06 5.41E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.81E-04 2.77E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 3.38E-03 3.15E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 66 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487

SIC CODE EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 19 RELEASE ACTIVITY: PDM1 SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.)
ASSOCIATED SIC CODES: Subset of 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

1000.00 High4/24/2013 Page 67 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:20 Number of Release Sites: Release Activity: 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:4/24/2013 Page 68 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 20 Number of Site s: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 7.43E-06 5.41E-05 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.81E-04 2.77E-03 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 69 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 20 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.18E-07 30.00 75.00 71.80 1.40 LADC pot (mg/L) 6.04E-06 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 70 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 20 RELEASE AC TIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 7.38E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 5.43E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.95E-07 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 71 of 116

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 m4/24/2013 Page 72 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:21 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/day)

Remarks:4/24/2013 Page 73 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 21 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 12.87 29.93 47.42 56.12
ALL 10 39.60 13.29 7.76 7.57 93.61 278.93 477.71 489.70

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 5.50E-07 4.00E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.82E-05 2.05E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 2.50E-03 2.33E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 74 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 21 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 5.46E-05 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 4.98E-02 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 4.02E-09 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.18E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 9.16E-06 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 75 of 116

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 m4/24/2013 Page 76 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:22 Number of Release Sites: Release Activity: 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:4/24/2013 Page 77 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 22 Number of Site s: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 5.50E-07 4.00E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 2.82E-05 2.05E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 78 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 22 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 8.72E-09 30.00 75.00 71.80 1.40 LADC pot (mg/L) 4.47E-07 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 79 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 22 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 5.46E-05 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 4.02E-09 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.18E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 80 of 116

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 m4/24/2013 Page 81 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:23 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/day)

Remarks:4/24/2013 Page 82 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 23 Number of Sites: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: 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

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 4.52 12.88 21.16 25.17
ALL 10 11.11 1.94 1.06 0.96 51.04 292.27 534.91 590.63

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 2.89E-07 3.27E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.48E-05 1.68E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.08E-03 2.44E-02 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 83 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 23 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 1.88E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 0.12 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.38E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 7.52E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 2.11E-05 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 84 of 116

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 m4/24/2013 Page 85 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:24 Number of Release Sites: Release Activity: 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:4/24/2013 Page 86 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 24 Number of Sites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 2.89E-07 3.27E-06 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 1.48E-05 1.68E-04 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 87 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 24 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 3.00E-08 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.54E-06 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 88 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 24 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 1.88E-04 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.38E-08 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 7.52E-08 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 89 of 116

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 m4/24/2013 Page 90 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:25 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/day)

Remarks:4/24/2013 Page 91 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 25 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 3.44 7.99 12.66 14.99
ALL 10 39.60 13.29 7.76 7.57 25.00 74.49 127.58 130.78

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 7.35E-08 5.34E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.77E-06 2.74E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 6.68E-04 6.22E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 92 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 25 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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): 1.81 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 3310.00 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.33E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 7.24E-04 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 0.61 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 93 of 116

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 m4/24/2013 Page 94 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:26 Number of Release Sites: Release Activity: 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:4/24/2013 Page 95 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 26 Number of Site s: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 7.35E-08 5.34E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 3.77E-06 2.74E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 96 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 26 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 2.89E-04 30.00 75.00 71.80 1.40 LADC pot (mg/L) 1.48E-02 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 97 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 26 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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): 1.81 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.33E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 7.24E-04 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 98 of 116

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 m4/24/2013 Page 99 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:27 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/day)

Remarks:4/24/2013 Page 100 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 27 Number of Site s: RELEASE ACTIVITY: Max ADR SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 4.86 11.30 17.91 21.20
ALL 10 39.60 13.29 7.76 7.57 35.35 105.34 180.41 184.94

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 1.04E-07 7.55E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 5.33E-06 3.87E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 9.45E-04 8.80E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 101 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 27 RELEASE AC TIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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): 2.63 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 4790.00 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.93E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.05E-03 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 0.88 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 102 of 116

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 m4/24/2013 Page 103 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:28 Number of Release Sites: Release Activity: 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:4/24/2013 Page 104 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 28 Number of Site s: RELEASE ACTIVITY: Max LADD SIC-CODE DESCRIPTION: POTW (Indust., incl udes POTWs which receive ind. disch.) SIC-CODE (S): Subset of 49 52 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 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 50 288.00 123.84 78.18 66.05 N/A N/A N/A N/A
ALL 10 39.60 13.29 7.76 7.57 N/A N/A N/A N/A

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 1.04E-07 7.55E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 5.33E-06 3.87E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 105 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 28 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 4.19E-04 30.00 75.00 71.80 1.40 LADC pot (mg/L) 2.15E-02 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 106 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 28 RELEASE AC TIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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): 2.63 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 1.93E-04 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 1.05E-03 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 107 of 116

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 m4/24/2013 Page 108 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:29 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/day)

Remarks:4/24/2013 Page 109 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 29 Number of Sites: RELEASE ACTIVITY: Max ADR
SIC-CODE DESCRIPTION: 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

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 0.66 1.89 3.10 3.68
ALL 10 11.11 1.94 1.06 0.96 7.47 42.78 78.30 86.46

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 1.41E-08 1.60E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 7.24E-07 8.19E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.58E-04 3.58E-03 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments:4/24/2013 Page 110 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 29 RELEASE ACTIVITY: Max ADR
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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): 0.00 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 Concentr ation (Stack): 6.58E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): 12.00 μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 4.84E-07 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.63E-06 N/A 30.00 75.00 NA NA Acute
ADR pot

(mg/kg/day) 2.21E-03 N/A NA 1 day 71.80 0.55

Inhalation Comments:4/24/2013 Page 111 of 116

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 m4/24/2013 Page 112 of 116

POST FOCUS EXPOSURE REPORT

Chemical ID: P-11-0487 Assessor: Flessner/SD
ENVIRONMENTAL RELEASES
Scenario#:30 Number of Release Sites: Release Activity: 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:4/24/2013 Page 113 of 116

POST FOCUS EXPOSURE REPORT
Chemical ID: P-11-0487
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 30 Number of Sites: RELEASE ACTIVITY: Max LADD
SIC-CODE DESCRIPTION: 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

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 N/A N/A N/A N/A
ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 1.41E-08 1.60E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 7.24E-07 8.19E-06 mg/L 0.00 0.00 mg/kg
Acute
ADR pot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments:4/24/2013 Page 114 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES
SCENARIO #: 30 ACTIVITY: Max LADD
RELEASE DESCRIPTION: EXPOSED POPULATION: Adult

NUMBER OF SITES NON-SLUDGE LANDFILL RELEASE AND DAYS OF RELEASE (kg/site/day)/(days) LANDFILLED SLUDGE 1 AND DAYS OF RELEASE (kg/site/day)/(days) MIGRATION DESCRIPTOR 2 ADSORPTION TO WASTEWATER SLUDGE (%) DRINKING WATER TREATMENT (%)

0.00 0.00

1 Landfilled sludge equals the fraction adsorbed to wastewater treatment sludge times the surface water pre-treatment release.

2 Migration Descriptor Log Koc Groundwater Concentration (GWC) (mg/L per kg release) Negligible no migration None Negligible to slow > 4.5 3.21E-6 Slow <4.5 to 3.5 2.67E-5 Moderate <3.5 to 2.5 5.95E-5 Rapid <2.5 7.55E-5

Exposure Units Results ASSUMPTIONS ED (years) AT (years) BW (kg) IR (L/day) Cancer LADD pot (mg/kg/day) 1.05E-06 30.00 75.00 71.80 1.40 LADC pot (mg/L) 5.38E-05 30.00 75.00 NA NA

REMARKS:4/24/2013 Page 115 of 116

POST FOCUS EXPOSURE REPORT Chemical ID: P-11-0487
INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)
SCENARIO #: 30 RELEASE ACTIVITY: Max 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): 0.00 μg/m 3

Max 24 Hour Average Air Concentration(Fugitive): N/A 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 Concentr ation (Stack): 6.58E-03 μg/m 3 Max 24 Hour Average Air Concentration (Stack): N/A μg/m 3

Exposure Units Results (Stack) Results (Fugitive) ASSUMPTIONS
ED (years) AT (years) BW (kg) Inh. Rate (m 3 /hr)
Cancer
LADD pot (mg/kg/day) 4.84E-07 N/A 30.00 75.00 71.80 0.55
LADC pot (mg/m 3 ) 2.63E-06 N/A 30.00 75.00 NA NA Acute
ADR pot

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

Inhalation Comments:4/24/2013 Page 116 of 116

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 m