December 3, 2009 Page 1 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Reviewer: Delpire 

 

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

Exposure Scenario1 Water Landfill Stack Air Fugitive Air 

Drinking Water Fish Ingestion 

ADR LADD ADR LADD 

7Q104 

CC=37 

PDM 

Days 

Exceeded

LADD ADR LADD ADR LADD 

Release activity(ies)2; 

exposure 

calculation(s)3

mg/kg/day mg/kg/day mg/kg/day mg/kg/day μg/l # Days mg/kg/day mg/kg/day mg/kg/day mg/kg/day mg/kg/day 

 max ADR, 

LADD, PDM 6.95E-04 4.79E-06 5.70E-04 1.45E-06 11.73 --- --- --- --- --- 

 max ADR, 

LADD, PDM 0.18 7.55E-04 8.99E-02 2.29E-04 3608.25 --- --- --- --- --- 

 max 

ADR, acute eco. 4.40E-02 --- 2.23E-02 --- 902.06 --- --- 8.68E-05 --- --- --- 

PDM --- --- --- --- 322.16 --- --- --- --- --- 

 max 

LADD --- 6.45E-05 --- 1.96E-05 --- --- 2.99E-05 --- 3.24E-07 --- --- 

max 

ADR, LADD, acute 

eco. 

2.83E-02 2.43E-06 

1.45E-02 7.37E-07

579.90 --- 1.13E-06 5.57E-05 1.22E-08 --- --- 

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 streamflow of 

the 7 consecutive days of lowest flow within a 10 year period. 

Remarks: 

Exposure Based Criteria 

Parameter Exp Based Persistent Exceedance Value 

Drinking (Surface) Water Dose (mg/kg/day) Yes Yes 0.18 

Fish Ingestion Dose (mg/kg/day) Yes Yes 8.99E-02 

Inhalation Dose (mg/kg/day) No No 

Groundwater Dose (mg/kg/day) No No 

Surface Water Release After Treatment (kg/yr) 

Total Release After Treatment (kg/yr) 
December 3, 2009 Page 2 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: Delpire 

ENVIRONMENTAL RELEASES 

 Scenario#:1 Number of Release Sites: 

 Release Activity: max ADR, LADD, PDM 

 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: 
December 3, 2009 Page 3 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER:1 RELEASE ACTIVITY: max ADR, LADD, PDM 

FACILITY NAME: 

FACILITY LOCATION: 

RECEIVING WATER NAME: 

REACH NUMBER: FACILITY ON REACH: DISCHARGE TYPE: 

NPDES PERMIT #: EXPOSED POPULATION:

WWT 

REMOVAL 

(%) 

RELEASE 

DAYS 

PRETREATMENT 

RELEASE 

(kg/site/day) 

POSTTREATMENT 

RELEASE 

(kg/site/day) 

DWT 

(%) BCF 

(L/kg) 

 0.00 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT 

FLOW (MLD) 

CONCENTRATION (μg/L) 4.48 8.32 11.73 14.60 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 4.79E-06 mg/kg/day 1.45E-06 mg/kg/day 

LADCpot 2.45E-04 mg/L 1.74E-02 mg/kg 

Acute 

ADRpot 6.95E-04 mg/kg/day 5.70E-04 mg/kg/day 

Surface Water Comments: 
December 3, 2009 Page 4 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO NUMBER: 1 RELEASE ACTIVITY: max ADR, LADD, PDM 

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 (%) 

37.00 
December 3, 2009 Page 5 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:2 Number of Release Sites: 

 Release Activity: max ADR, LADD, PDM 

 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: 
December 3, 2009 Page 6 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY max 

ADR, LADD, PDM 

SIC-CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

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 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

PLANT 

TYPE 

% ILE 

FACILITY 

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

Harmonic 

Mean 30Q5 7Q10 1Q10 

Harmonic 

Mean 30Q5 7Q10 1Q10 

ALL 50 288.00 123.84 78.18 66.05 97.22 226.10 358.15 423.92 

ALL 10 39.60 13.29 7.76 7.57 707.07 2106.85 3608.25 3698.81 

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 

LADDpot 1.04E-04 7.55E-04 mg/kg/day 3.15E-05 2.29E-04 mg/kg/day 

LADCpot 5.33E-03 3.87E-02 mg/L 0.38 2.74 mg/kg 

Acute 

ADRpot 1.89E-02 0.18 mg/kg/day 1.24E-02 8.99E-02 mg/kg/day 

SIC Code Comments: 
December 3, 2009 Page 7 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC CODE EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 2 RELEASE ACTIVITY: max ADR, LADD, PDM 

SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

ASSOCIATED SIC CODES: 4952 

SIC CODE RESULTS 

COC (μg/L) 

Percent of 

Year COC 

Exceeded 

Number of 

Days COC 

Exceeded 

Release 

days/year 

Loading 

(kg/site/day) 

Waste Water 

Treatment (%) 

High/Avg 

Analysis 

37.00 High 
December 3, 2009 Page 8 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:3 Number of Release Sites: 

 Release Activity: : max ADR, acute eco. 

 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: 
December 3, 2009 Page 9 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 3 Number of Sites: RELEASE 

ACTIVITY : max 

ADR, acute eco. 

SIC-CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

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 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

PLANT 

TYPE 

% ILE 

FACILITY 

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

Harmonic 

Mean 30Q5 7Q10 1Q10 

Harmonic 

Mean 30Q5 7Q10 1Q10 

ALL 50 288.00 123.84 78.18 66.05 24.31 56.52 89.54 105.98 

ALL 10 39.60 13.29 7.76 7.57 176.77 526.71 902.06 924.70 

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 

LADDpot 5.19E-07 3.78E-06 mg/kg/day 1.58E-07 1.15E-06 mg/kg/day 

LADCpot 2.66E-05 1.94E-04 mg/L 1.89E-03 1.37E-02 mg/kg 

Acute 

ADRpot 4.72E-03 4.40E-02 mg/kg/day 3.09E-03 2.25E-02 mg/kg/day 

SIC Code Comments: 
December 3, 2009 Page 10 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 3 RELEASE ACTIVITY: : max ADR, acute eco. 

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/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

0.00 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): 2.58E-04 μg/m3

Max 24 Hour Average Air Concentration (Stack): 0.47 μg/m3

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 1.90E-08 N/A 30.00 75.00 71.80 0.55 

LADCpot (mg/m3) 1.03E-07 N/A 30.00 75.00 NA NA 

Acute 

ADRpot (mg/kg/day) 8.68E-05 N/A NA 1 day 71.80 0.55 

Inhalation Comments: 
December 3, 2009 Page 11 of 25 

 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 
December 3, 2009 Page 12 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:4 Number of Release Sites: 

 Release Activity: : PDM 

 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: 
December 3, 2009 Page 13 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 4 Number of Sites: RELEASE 

ACTIVITY: PDM 

SIC-CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

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 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

PLANT 

TYPE 

% ILE 

FACILITY 

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

Harmonic 

Mean 30Q5 7Q10 1Q10 

Harmonic 

Mean 30Q5 7Q10 1Q10 

ALL 50 288.00 123.84 78.18 66.05 8.68 20.19 31.98 37.85 

ALL 10 39.60 13.29 7.76 7.57 63.13 188.11 322.16 330.25 

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 

LADDpot 8.53E-06 6.21E-05 mg/kg/day 2.59E-06 1.88E-05 mg/kg/day 

LADCpot 4.38E-04 3.18E-03 mg/L 3.10E-02 0.23 mg/kg 

Acute 

ADRpot 1.69E-03 1.57E-02 mg/kg/day 1.10E-03 8.03E-03 mg/kg/day 

SIC Code Comments: 
December 3, 2009 Page 14 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC CODE EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 4 RELEASE ACTIVITY: PDM 

SIC CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

ASSOCIATED SIC CODES: 4952 

SIC CODE RESULTS 

COC (μg/L) 

Percent of 

Year COC 

Exceeded 

Number of 

Days COC 

Exceeded 

Release 

days/year 

Loading 

(kg/site/day) 

Waste Water 

Treatment (%) 

High/Avg 

Analysis 

37.00 High 
December 3, 2009 Page 15 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:5 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: 
December 3, 2009 Page 16 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 5 Number of Sites: RELEASE 

ACTIVITY: : max 

LADD 

SIC-CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

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 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

PLANT 

TYPE 

% ILE 

FACILITY 

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

Harmonic 

Mean 30Q5 7Q10 1Q10 

Harmonic 

Mean 30Q5 7Q10 1Q10 

ALL 50 288.00 123.84 78.18 66.05 414.93 964.95 1528.52 1809.24 

ALL 10 39.60 13.29 7.76 7.57 3017.68 8991.72 1.54E+04 1.58E+04

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 

LADDpot 8.87E-06 6.45E-05 mg/kg/day 2.69E-06 1.96E-05 mg/kg/day 

LADCpot 4.55E-04 3.31E-03 mg/L 3.22E-02 0.23 mg/kg 

SIC Code Comments: 
December 3, 2009 Page 17 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c 

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES 

SCENARIO #: 5 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 

 

ASSUMPTIONS 

 Exposure Units Results ED 

(years) 

AT 

(years) 

BW 

(kg) 

IR 

 (L/day) 

Cancer 

LADDpot (mg/kg/day) 2.99E-05 30.00 75.00 71.80 1.40 

LADCpot (mg/L) 1.53E-03 30.00 75.00 NA NA 

REMARKS: 

 
December 3, 2009 Page 18 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 5 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/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

0.00 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): 4.41E-03 μg/m3

Max 24 Hour Average Air Concentration (Stack): 8.05 μg/m3

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 3.24E-07 N/A 30.00 75.00 71.80 0.55 

LADCpot (mg/m3) 1.76E-06 N/A 30.00 75.00 NA NA 

Inhalation Comments: 
December 3, 2009 Page 19 of 25 

 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 
December 3, 2009 Page 20 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:6 Number of Release Sites: 

 Release Activity: : max ADR, LADD, acute eco. 

 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: 
December 3, 2009 Page 21 of 25 

POST-FOCUS EXPOSURE REPORT 

 Chemical ID: P090447c 

SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 6 Number of Sites: RELEASE 

ACTIVITY: max 

ADR, LADD, acute eco. 

SIC-CODE DESCRIPTION: POTW (Indust., includes POTWs which receive ind. disch.) 

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 70.80 

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER 

PLANT 

TYPE 

% ILE 

FACILITY 

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

Harmonic 

Mean 30Q5 7Q10 1Q10 

Harmonic 

Mean 30Q5 7Q10 1Q10 

ALL 50 288.00 123.84 78.18 66.05 15.62 36.34 57.56 68.13 

ALL 10 39.60 13.29 7.76 7.57 113.64 338.60 579.90 594.45 

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 

LADDpot 3.34E-07 2.43E-06 mg/kg/day 1.01E-07 7.37E-07 mg/kg/day 

LADCpot 1.71E-05 1.25E-04 mg/L 1.21E-03 8.82E-03 mg/kg 

Acute 

ADRpot 3.04E-03 2.83E-02 mg/kg/day 1.99E-03 1.45E-02 mg/kg/day 

SIC Code Comments: 
December 3, 2009 Page 22 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c 

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES 

SCENARIO #: 6 ACTIVITY: : max ADR, LADD, acute eco. 

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 

 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 

 

ASSUMPTIONS 

 Exposure Units Results ED 

(years) 

AT 

(years) 

BW 

(kg) 

IR 

 (L/day) 

Cancer 

LADDpot (mg/kg/day) 1.13E-06 30.00 75.00 71.80 1.40 

LADCpot (mg/L) 5.78E-05 30.00 75.00 NA NA 

REMARKS: 

 
December 3, 2009 Page 23 of 25 

POST-FOCUS EXPOSURE REPORT 

Chemical ID: P090447c 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 6 RELEASE ACTIVITY : max ADR, LADD, acute eco. 

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/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

0.00 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): 1.66E-04 μg/m3

Max 24 Hour Average Air Concentration (Stack): 0.30 μg/m3

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 1.22E-08 N/A 30.00 75.00 71.80 0.55 

LADCpot (mg/m3) 6.64E-08 N/A 30.00 75.00 NA NA 

Acute 

ADRpot (mg/kg/day) 5.57E-05 N/A NA 1 day 71.80 0.55 

Inhalation Comments: 
December 3, 2009 Page 24 of 25 

 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 
December 3, 2009 Page 25 of 25 

LEGEND FOR NEW CHEMICALS EXPOSURE REPORT 

This new chemicals exposure report was prepared by the Exposure Assessment Branch (EAB) of the Economics, 

Exposure and Technology Division, Office of Pollution Prevention and Toxics, USEPA. 

The goals of these reports are to calculate conservative (protective) estimates of exposure endpoints for consumers, 

the general population, and the environment. 

For each exposure scenario to industrial releases, the following three endpoints are calculated: 

(1) maximum possible acute concentrations and doses 

(2) maximum possible chronic concentrations and doses 

(3) for water releases ≥ 20 days, the probability of exceedance of the aquatic concentration of concern 

These endpoints are identified by abbreviations on the Release Activity line, e.g., (1) max ADR, (2) max 

LADD, (3) max PDM. Depending on the release inputs, these endpoints may be calculated and presented on 

the same page or different pages. That is, a release activity ID of mfg; max ADR, max PDM, max LADD

indicates that all the exposure endpoints were calculated from common manufacturing release values; 

conversely, a release activity ID of mfg &proc; max ADR indicates that only the maximum acute exposure 

values were calculated for manufacturing and processing releases that occurred at the same site. 

For each consumer product use exposure scenario, whether exposure is to the user directly or to the general 

population/environment, the maximum exposure values are calculated and presented together. 

In addition to the exposure values above, EPA policy directs that exposure and release values be compared to 

criteria threshold values for Exposure-based and PBT Exposure-based cases. 

Exposure-based (YX) cases (those with ≥ 100,000 kg/yr production volume) 

Criteria are exceeded under the following conditions: 

 Presence in consumer product with likely exposure 

≥ 3E-3 mg/kg/d exposure via air, fish ingestion or drinking water 

≥ 10,000 kg/yr release to environment (post-treatment) 

≥ 1,000 kg/yr release to water (post-treatment) 

Persistent, Bioaccumulative, Toxic (PBT) chemicals of P2B2 rating or higher and production volume ≥ 20,000 kg/yr 

Criteria are exceeded as for YX cases, with the following differences: 

≥ 2,000 kg/yr release to environment (post-treatment) 

≥ 200 kg/yr release to water (post-treatment) 

Bolding rules in the Report: Values for endpoints above that are also health or eco concerns are bolded.