3/4/2015 Page 1 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 Reviewer: Kwon/SD 

 

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

Exposure Scenario1 Water Landfill Stack Air Fugitive Air 

Release activity(ies)2; 

exposure calculation(s)3

Drinking Water Fish Ingestion 7Q104 

CC =30

PDM 

Days 

Exceeded

LADD ADR LADD ADR LADD 

ADR LADD ADR LADD 

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: max 

acute eco 9.30E-05 --- 1.98E-05 --- 3.63E+00 --- --- 3.66E-02 --- 5.31E-02 --- 

 PDM1 --- --- --- --- 3.63E+00 --- --- --- --- --- 

 Max LADD --- 1.05E-06 --- 2.40E-08 --- --- 3.40E-05 --- --- --- --- 

 Max ADR: max 

acute eco 2.07E-04 --- 2.62E-05 --- 8.08E+00 --- --- --- --- 1.30E-01 --- 

 PDM1 --- --- --- --- 8.08E+00 --- --- --- --- --- 

 Max LADD --- 2.79E-06 --- 6.36E-08 --- --- 1.65E-04 --- 3.37E-04 --- 9.21E-04

1

 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufacturing (Mfg), Processing (Proc) and Use release activity labels. 

 Multiple release activities are combined in one exposure scenario if their releases occur at same location. 

3

 Exposure calculations are Acute Dose Rate (ADR), Lifetime Average Daily Dose (LADD), and Probabilistic Dilution 

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

 CC is the aquatic concentration of concern. 

4

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

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

Remarks: 
3/4/2015 Page 2 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 3 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:1 RELEASE ACTIVITY: Max ADR 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: 

NPDES PERMIT #: EXPOSED POPULATION: Adult 

WWT 

REMOVAL 

(%) 

RELEASE 

DAYS 

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) 1.79 2.46 3.63 3.63 NA 

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES 

Exposure Units 

Drinking Water 

Results 

Drinking Water 

Units 

Fish Ingestion 

Results 

Fish Ingestion 

Units 

Cancer 

LADDpot 1.05E-06 mg/kg/day 2.40E-08 mg/kg/day 

LADCpot 8.11E-05 mg/L 2.56E-04 mg/kg 

Acute 

ADRpot 9.30E-05 mg/kg/day 1.98E-05 mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 4 of 23 

POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 

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): 

2.45 μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

290.00 μg/m3

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): 0.54 μg/m3

Max 24 Hour Average Air Concentration (Stack): 200.00 μg/m3

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) 

ASSUMPTIONS 

ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 4.17E-05 1.90E-04 33.00 78.00 80.00 0.61 

LADCpot (mg/m3) 2.28E-04 1.04E-03 33.00 78.00 NA NA 

Acute 

ADRpot (mg/kg/day) 3.66E-02 5.31E-02 NA 1 day 80.00 0.61 

Inhalation Comments: 
3/4/2015 Page 5 of 23 

 Stack Parameter Data Fugitive Parameter Data 

Stack Height 10.00 m Release Height: 3.00 m 

Inside Stack 

Diameter: 

0.10 m Length of Release 

Opening: 

10.00 m 

Stack Gas Exit 

Velocity: 

0.10 m/sec Width of Release 

Opening: 

10.00 m 

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 
3/4/2015 Page 6 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 7 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:2 RELEASE ACTIVITY: PDM1 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH 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) 1.79 2.46 3.63 3.63 NA 

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES 

Exposure Units 

Drinking Water 

Results 

Drinking Water 

Units 

Fish Ingestion 

Results 

Fish Ingestion 

Units 

Cancer 

LADDpot 1.05E-06 mg/kg/day 2.40E-08 mg/kg/day 

LADCpot 8.11E-05 mg/L 2.56E-04 mg/kg 

Acute 

ADRpot 9.30E-05 mg/kg/day 1.98E-05 mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 8 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER: 2 RELEASE ACTIVITY: 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 

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 (%) 

30.00 
3/4/2015 Page 9 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 10 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:3 RELEASE ACTIVITY: Max LADD 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: 

NPDES PERMIT #: EXPOSED POPULATION: Adult 

WWT 

REMOVAL 

(%) 

RELEASE 

DAYS 

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 

LADDpot 1.05E-06 mg/kg/day 2.40E-08 mg/kg/day 

LADCpot 8.11E-05 mg/L 2.56E-04 mg/kg 

Acute 

ADRpot N/A mg/kg/day N/A mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 11 of 23 

POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES 

SCENARIO #: 3 ACTIVITY: Max LADD 

RELEASE DESCRIPTION: 

EXPOSED POPULATION: Adult 

NUMBER 

OF 

SITES 

NON-SLUDGE 

LANDFILL 

RELEASE AND 

DAYS OF 

RELEASE 

(kg/site/day)/(days) 

 LANDFILLED 

SLUDGE1 

AND DAYS OF 

RELEASE 

(kg/site/day)/(days)

MIGRATION 

DESCRIPTOR2

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 

LADDpot (mg/kg/day) 3.40E-05 33.00 78.00 80.00 1.04 

LADCpot (mg/L) 2.62E-03 33.00 78.00 NA NA 

REMARKS: 

 
3/4/2015 Page 12 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 13 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:4 RELEASE ACTIVITY: Max ADR 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: 

NPDES PERMIT #: EXPOSED POPULATION: Adult 

WWT 

REMOVAL 

(%) 

RELEASE 

DAYS 

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) 2.37 5.47 8.08 9.96 NA 

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES 

Exposure Units 

Drinking Water 

Results 

Drinking Water 

Units 

Fish Ingestion 

Results 

Fish Ingestion 

Units 

Cancer 

LADDpot 2.79E-06 mg/kg/day 6.36E-08 mg/kg/day 

LADCpot 2.15E-04 mg/L 6.78E-04 mg/kg 

Acute 

ADRpot 2.07E-04 mg/kg/day 2.62E-05 mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 14 of 23 

POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 4 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): 

11.90 μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

700.00 μg/m3

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/m3

Max 24 Hour Average Air Concentration (Stack): 0.00 μg/m3

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) 

ASSUMPTIONS 

ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) N/A 9.21E-04 33.00 78.00 80.00 0.61 

LADCpot (mg/m3) N/A 5.03E-03 33.00 78.00 NA NA 

Acute 

ADRpot (mg/kg/day) N/A 0.13 NA 1 day 80.00 0.61 

Inhalation Comments: 
3/4/2015 Page 15 of 23 

 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 

Meteorological Class: Full 

Stability Class: NA 

Wind Speed: NA 

 

 Downwash Information: 

Facility Length: NA m 

Facility Width: NA m 

Facility Height: NA m 
3/4/2015 Page 16 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 17 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:5 RELEASE ACTIVITY: PDM1 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH 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) 2.37 5.47 8.08 9.96 NA 

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES 

Exposure Units 

Drinking Water 

Results 

Drinking Water 

Units 

Fish Ingestion 

Results 

Fish Ingestion 

Units 

Cancer 

LADDpot 2.79E-06 mg/kg/day 6.36E-08 mg/kg/day 

LADCpot 2.15E-04 mg/L 6.78E-04 mg/kg 

Acute 

ADRpot 2.07E-04 mg/kg/day 2.62E-05 mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 18 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER: 5 RELEASE ACTIVITY: 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: 

MEAN FLOW (MLD): 7q10 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 (%) 

30.00 
3/4/2015 Page 19 of 23 

 POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 Assessor: Kwon/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: 
3/4/2015 Page 20 of 23 

POST FOCUS EXPOSURE REPORT 

 Chemical ID: P-15-0036 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:6 RELEASE ACTIVITY: Max LADD 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: 

NPDES PERMIT #: EXPOSED POPULATION: Adult 

WWT 

REMOVAL 

(%) 

RELEASE 

DAYS 

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 

LADDpot 2.79E-06 mg/kg/day 6.36E-08 mg/kg/day 

LADCpot 2.15E-04 mg/L 6.78E-04 mg/kg 

Acute 

ADRpot N/A mg/kg/day N/A mg/kg/day 

Surface Water Comments: 
3/4/2015 Page 21 of 23 

POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 

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 

SLUDGE1 

AND DAYS OF 

RELEASE 

(kg/site/day)/(days)

MIGRATION 

DESCRIPTOR2

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 

LADDpot (mg/kg/day) 1.65E-04 33.00 78.00 80.00 1.04 

LADCpot (mg/L) 1.27E-02 33.00 78.00 NA NA 

REMARKS: 

 
3/4/2015 Page 22 of 23 

POST FOCUS EXPOSURE REPORT 

Chemical ID: P-15-0036 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 6 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): 

11.90 μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

N/A μg/m3

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): 4.35 μg/m3

Max 24 Hour Average Air Concentration (Stack): N/A μg/m3

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) 

ASSUMPTIONS 

ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 3.37E-04 9.21E-04 33.00 78.00 80.00 0.61 

LADCpot (mg/m3) 1.84E-03 5.03E-03 33.00 78.00 NA NA 

Acute 

ADRpot (mg/kg/day) N/A N/A NA 1 day 80.00 0.61 

Inhalation Comments: 
3/4/2015 Page 23 of 23 

 Stack Parameter Data Fugitive Parameter Data 

Stack Height 10.00 m Release Height: 3.00 m 

Inside Stack 

Diameter: 

0.10 m Length of Release 

Opening: 

10.00 m 

Stack Gas Exit 

Velocity: 

0.10 m/sec Width of Release 

Opening: 

10.00 m 

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