4/8/2015 Page 1 of 7

INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P-15-0356 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 = 1

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

PROC+USE: Max ADR --- --- --- --- --- --- --- 1.10E-07 --- 1.08E-06 ---

PROC+USE: Max 

LADD --- --- --- --- --- --- --- --- 4.41E-09 --- 8.05E-09

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: 
4/8/2015 Page 2 of 7 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0356 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: 

Release Activity: PROC+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: 
4/8/2015 Page 3 of 7 

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0356

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY:PROC+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

Max Annual Average Air Concentration 

(Fugitive):

4.12E-05 μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive):

5.88E-03 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): 1.05E-05 μg/m3

Max 24 Hour Average Air Concentration (Stack): 6.02E-04 μg/m3

Exposure Units

Results

(Stack)

Results

(Fugitive)

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

Inh. Rate 

(m3/hr)

Cancer

LADDpot (mg/kg/day) 8.13E-10 3.19E-09 33.00 78.00 80.00 0.61

LADCpot (mg/m3) 4.44E-09 1.74E-08 33.00 78.00 NA NA

Acute

ADRpot (mg/kg/day) 1.10E-07 1.08E-06 NA 1 day 80.00 0.61

Inhalation Comments: 
4/8/2015 Page 4 of 7

 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
4/8/2015 Page 5 of 7 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0356 Assessor: Bevington/SD

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: 

Release Activity: PROC+USE: 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: 
4/8/2015 Page 6 of 7 

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-15-0356

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 RELEASE ACTIVITY:PROC+USE: 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):

1.04E-04 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): 5.70E-05 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) 4.41E-09 8.05E-09 33.00 78.00 80.00 0.61

LADCpot (mg/m3) 2.41E-08 4.40E-08 33.00 78.00 NA NA

Acute

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

Inhalation Comments: 
4/8/2015 Page 7 of 7

 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