4/22/2015 Page 1 of 19

INITIAL REVIEW EXPOSURE REPORT (IRExR) 

 Chemical ID: P-15-0382 Reviewer: Bevington/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 = 500

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 acute eco --- --- --- --- 1.12E+01 --- --- --- --- --- ---

 PDM1 --- --- --- --- 1.12E+01 --- --- --- --- ---

: max acute 

eco

--- --- --- --- 1.03E+01 --- --- --- --- 3.66E-02 ---

 PDM1 --- --- --- --- 1.03E+01 --- --- --- --- ---

 PDM2 --- --- --- --- 2.58E+00 --- --- --- --- ---

: Max 

LADD --- --- --- --- --- --- --- --- --- --- 8.67E-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. 
4/22/2015 Page 2 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/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: 
4/22/2015 Page 3 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382

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 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 2.36 6.63 11.18 13.42 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 2.46E-06 mg/kg/day 0.00 mg/kg/day

LADCpot 1.89E-04 mg/L 0.00 mg/kg

Acute

ADRpot 2.51E-04 mg/kg/day 0.00 mg/kg/day

Surface Water Comments: 
4/22/2015 Page 4 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/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: 
4/22/2015 Page 5 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382

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 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT

FLOW (MLD)

CONCENTRATION (μg/L) 2.36 6.63 11.18 13.42 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 2.46E-06 mg/kg/day 0.00 mg/kg/day

LADCpot 1.89E-04 mg/L 0.00 mg/kg

Acute

ADRpot 2.51E-04 mg/kg/day 0.00 mg/kg/day

Surface Water Comments: 
4/22/2015 Page 6 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382

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: 

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 (%)

4.00 90.00
4/22/2015 Page 7 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:3 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: 
4/22/2015 Page 8 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382 

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

SCENARIO #: 3 Number of Sites: RELEASE 

ACTIVITY: : Max 

ADR

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

SIC-CODE (S): Subset of 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. (μg/l)

Harmonic 

Mean 30Q5 7Q10 1Q10

Harmonic 

Mean 30Q5 7Q10 1Q10

ALL 50 288.00 123.84 78.18 66.05 0.28 0.65 1.02 1.21

ALL 10 39.60 13.29 7.76 7.57 2.02 6.02 10.31 10.57

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 1.38E-07 1.00E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADCpot 1.06E-05 7.73E-05 mg/L 0.00 0.00 mg/kg

Acute

ADRpot 2.45E-05 2.28E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments: 
4/22/2015 Page 9 of 19

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 3 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):

11.20 μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive):

200.00 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 8.67E-04 33.00 78.00 80.00 0.61

LADCpot (mg/m3) N/A 4.74E-03 33.00 78.00 NA NA

Acute

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

Inhalation Comments: 
4/22/2015 Page 10 of 19

 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
4/22/2015 Page 11 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:4 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: 
4/22/2015 Page 12 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382 

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

SCENARIO #: 4 Number of Sites: RELEASE 

ACTIVITY: : PDM1

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

SIC-CODE (S): Subset of 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. (μg/l)

Harmonic 

Mean 30Q5 7Q10 1Q10

Harmonic 

Mean 30Q5 7Q10 1Q10

ALL 50 288.00 123.84 78.18 66.05 0.28 0.65 1.02 1.21

ALL 10 39.60 13.29 7.76 7.57 2.02 6.02 10.31 10.57

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 1.38E-07 1.00E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADCpot 1.06E-05 7.73E-05 mg/L 0.00 0.00 mg/kg

Acute

ADRpot 2.45E-05 2.28E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments: 
4/22/2015 Page 13 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 4 RELEASE ACTIVITY: PDM1

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

ASSOCIATED SIC CODES: Subset of 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

4.00 High
4/22/2015 Page 14 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:5 Number of Release Sites: 

Release Activity: PDM2

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: 
4/22/2015 Page 15 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382 

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

SCENARIO #: 5 Number of Sites: RELEASE 

ACTIVITY: PDM2

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

SIC-CODE (S): Subset of 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. (μg/l)

Harmonic 

Mean 30Q5 7Q10 1Q10

Harmonic 

Mean 30Q5 7Q10 1Q10

ALL 50 288.00 123.84 78.18 66.05 6.94E-02 0.16 0.26 0.30

ALL 10 39.60 13.29 7.76 7.57 0.51 1.50 2.58 2.64

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 2.62E-07 1.90E-06 mg/kg/day 0.00 0.00 mg/kg/day

LADCpot 2.01E-05 1.46E-04 mg/L 0.00 0.00 mg/kg

Acute

ADRpot 6.12E-06 5.70E-05 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments: 
4/22/2015 Page 16 of 19

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-15-0382

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 5 RELEASE ACTIVITY: PDM2

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

ASSOCIATED SIC CODES: Subset of 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

4.00 High
4/22/2015 Page 17 of 19

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382 Assessor: Bevington/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: 
4/22/2015 Page 18 of 19

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0382

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):

11.20 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): 0.00 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) N/A 8.67E-04 33.00 78.00 80.00 0.61

LADCpot (mg/m3) N/A 4.74E-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: 
4/22/2015 Page 19 of 19

 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