3/26/2014 Page 1 of 14



### POST FOCUS EXPOSURE REPORT

Che mical ID: P -13-0674 Reviewer: Kwon/SD

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 = 11 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

USE: Max ADR 1. 15 E

- 04

--- 2.72 E

- 06

--- 2.03

--- --- --- --- 4.40E

- 01

---

USE: PDM1

--- --- --- --- 2.03

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

USE: Max LADD

--- 2.56 E- 06

--- 3.46 E- 08

--- --- 4.32E

- 02

--- --- --- 9.56E

- 03

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

2 Release activities are from engineering report's Manufacturing (Mfg), Processing (Proc) and Use release

activity labels. Multiple release activities are combined in one exposure scenario if their releases occur at

same location.

3 Expo sure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and

Probabilistic Dilution Model (PDM). There may be one, two, or all three exposure calculations per exposure

scenario.CC is the aquatic concentration of concern.

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

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

Remarks:



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

Parameter Exp Based Persistent Exceedance Value

Drinking (Surface) Water Dose (mg/kg/day) No NA

Fish Ingestion Dose (mg/kg/day) No NA

Inhalation Dose (mg/kg/day) Yes NA 9.56E

- 03

Groundwater Dose (mg/kg/day) Yes NA 4.32E

- 02

Surface Water Release Afte r Treatment (kg/yr)

Total Release After Treatment (kg/yr)

Consumer Use? No



### Fate test recommendations?: (default is NA)3/26/2014 Page 2 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID : P- 13

- 0674 Assessor: Kwon/SD

ENVIRONMENTAL REL EASES

Scenario#: 1 Number of Release Sites:

Release Activity: USE: 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:3/26/2014 Page 3 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID : P- 13 -0 674

SI TE

- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 1 RELEASE ACTIVITY: USE: Max ADR

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: F ACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 3.16

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 0.48 1.37 2.03 2.50 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 2.56E

- 06 mg/kg/day 3.46 E- 08 mg/kg/day

LADC pot 1.31E

- 04 mg/L 4.14E

- 04 mg/kg

Acute

ADR pot 1.15E

- 04 mg/kg/day 2.72E

- 06 mg/kg/day

Surface Water Comments:3/26/2014 Page 4 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID: P

- 13

- 0674

SITE

- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SU RFACE WATER RELEASES

SCENARIO NUMBER: 1 RELEASE ACTIVITY: USE: Max ADR

FACILITY NAME:

FACILITY LOCATION:

RECEIVING STREAM NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPD ES PERMIT NUMBER: GAGING STATION ID:

GAGING STATION

PERIOD OF RECORD: GAGING STATION

NUMBER OF

OBSERVATIONS: NUMBER OF STATIONS ON

REACH:

50 %ile FLOW (MLD): 10 %ile FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

COC (μg/L) Percent of Year

COC Exceeded Number of Days

COC Exceeded Release

days/year Pre

- treatment

Loading

(kg/site/day) Waste Water

Treatment (%)

11.003/26/2014 Page 5 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID: P

- 13

- 0674

INHALATION EXPOSURE EST IMATES (POST

- TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY:USE: 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

M ax Annual Average Air Concentration

(Fugitive): 130.00 μg/m 3

Max 24 Hour Average Air

Concentration(Fugitive): 2390.00 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 Concentration (Stack): 0.00 μg/m 3

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

Exposure Units R esults

(Stack) Results

(Fugitive) ASSUMPTIONS

ED

(years) AT

(years) BW

(kg) Inh. Rate

(m 3 /hr)

Cancer

LADD pot (mg/kg/day) N/A 9.56E

- 03 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 5.20E

- 02 30.00 75.00 NA NA

Acute

ADR pot (mg/kg/day) N/A 0.44 NA 1 day 71.80 0.55

Inhalation Comments:3/26/2014 Page 6 of 14

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 Release Height: 3.00 m

Inside Stack

Diameter: 0.10 Length of Release

Opening: 10.00 m

Stack Gas Exit

Velocity: 0.10 Width of Release

Opening: 10.00 m

Stack Gas

Temperature: 293.00

Meteorological and Terrain Information:

Surrounding Land Use: Rural

Terrain Height: 0.00 m

Distance to Residence of Interest: 100.00 m

Meteoro logical Class: Full

Stability Class: NA

Wind Speed: NA

Downwash Information:

Facility Length: NA m

Facility Width: NA m

Facility Height: NA m3/26/2014 Page 7 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID : P- 13

- 0674 Assessor: Kwon/SS

ENVIRONMENTA L RELEASES

Scenario#: 2 Number of Release Sites:

Release Activity: USE: PDM1

Release Description: WATER LANDFILL

Non

- sludge/Sludge STACK FUGITIVE

Total Releases:

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

N on

- sludge/Sludge

Release Days/yr:

Per Site Release:

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

Remarks:3/26/2014 Page 8 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID : P- 13

- 0674

SI TE

- SPE CIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 2 RELEASE ACTIVITY: USE: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

REACH NUMBER: FACILITY ON REAC H: DISCHARGE TYPE:

NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 3.16

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 0.48 1.37 2.03 2.50 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 2.56E

- 06 mg/kg/day 3.46 E- 08 mg/kg/day

LADC pot 1.31E

- 04 mg/L 4.14E

- 04 mg/kg

Acute

ADR pot 1.15E

- 04 mg/kg/day 2.72E

- 06 mg/kg/day

Surface Water Comments:3/26/2014 Page 9 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID: P

- 13

- 0674

SITE

- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SU RFACE WATER RELEASES

SCENARIO NUMBER: 2 RELEASE ACTIVITY: USE: PDM1

FACILITY NAME:

FACILITY LOCATION:

RECEIVING STREAM NAME:

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT NUMBER: GAGING STATION ID:

GAGING STATION

PERIOD OF RECORD: GAGING STATION

NUMBER OF

OBSERVATIONS: NUMBER OF STATIONS ON

REACH:

50 %ile FLOW (MLD): 10 %ile FLOW (MLD): EFFLUENT FLOW (MLD):

RESULTS

C OC (μg/L) Percent of Year

COC Exceeded Number of Days

COC Exceeded Release

days/year Pre

- treatment

Loading

(kg/site/day) Waste Water

Treatment (%)

11.003/26/2014 Page 10 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID : P- 13

- 0674 Assessor: Kwon /SS

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites:

Release Activity: USE: Max LADD

Release Description: WATER LANDFILL

Non

- sludge/Sludge STACK FUGITIVE

Total Releases:

(kg/yr) (kg/y r) (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:3/26/2014 Page 11 of 14

POST FOCUS EXPOSURE REPO RT

Chemical ID : P- 13

- 0674

SI TE

- SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES

SCENARIO NUMBER: 3 RELEASE ACTIVITY: USE: Max LADD

FACILITY NAME:

FACILITY LOCATION:

RECEIVING WATER NAME:

RE ACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE:

NPDES PERMIT #: EXPOSED POPULATION: Adult

WWT

REMOVAL

(%) RELEASE

DAYS PRETREATMENT

RELEASE

(kg/site/day) POSTTREATMENT

RELEASE

(kg/site/day) DWT

(%) BCF

(L/kg)

0.00 3.16

AQUATIC EXPOSURE ESTIMATES

- SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) N/A N/A N/A N/A NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water

Results Drinking Water

Units Fish Ingestion

Results Fish Ingestion

Units

Cancer

LADD pot 2.56E

- 06 mg/kg/day 3.46E

- 08 mg/kg/day

LADC pot 1.31E

- 04 mg/L 4.14E

- 04 mg/kg

Acute

ADR pot N/A mg/kg/day N/A mg/kg/day

Surface Water Comments:3/26/2014 Page 12 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID: P

- 13

- 0674

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 3 ACTIVITY: USE: Max LADD

RELEASE DESCRIPTION:

EXPOSED POPULATION: Ad ult

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) 4.32E

- 02 30.00 75.00 71.80 1.40

LADC pot (mg/L) 2.22 30.00 75.00 NA NA

REMARKS:3/26/2014 Page 13 of 14

POST FOCUS EXPOSURE REPORT

Chemical ID: P

- 13

- 0674

INHALATION EXPOSURE ESTIMATES (POST

- TREATMENT)

SCENARIO #: 3 RELEASE ACTIVITY:USE: Max LADD

RELEASE DESCRIPTION:

METHOD OF CALCULATION: Screen3

EXPOSED POPULATION: Adult

Number of Sites:

Per Site Fugitive Relea se: kg /site/day

Fugitive Release Days per Year: da ys

% Removal via Fugitive Release: %

T otal Fugitive Release: kg/yr

M ax Annual Average Air Concentration

(Fugitive): 130.00 μg/m 3

Max 24 Hour Average Air

Concentration(Fugitiv e): 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 Concentration (Stack): 0.00 μg/m 3

Max 24 Hour Average Air Concentratio n (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) N/A 9.56E

- 03 30.00 75.00 71.80 0.55

LADC pot (mg/m 3 ) N/A 5.20E

- 02 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:3/26/2014 Page 14 of 14

Stack Parameter Data Fugitive Parameter Data

Stack Height 10.00 Release Height: 3.00 m

Inside Stack

Diamete r: 0.10 Length of Release

Opening: 10.00 m

Stack Gas Exit

Velocity: 0.10 Width of Release

Opening: 10.00 m

Stack Gas

Temperature: 293.00

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