9/4/2013 Page 1 of 5 

INITIAL REVIEW EXPOSURE REPORT (IRExR) 

 Chemical ID: P-13-0839 Reviewer: Wong/BC 

 

 

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 = 

1 

PDM 

Days 

Exceede

d 

LADD ADR LADD ADR LADD 

Release 

activity(ies)2

; exposure 

calculation(s)

3 

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

USE: Max 

LADD 

--- --- --- --- --- --- 9.24E-04 --- 5 .41E-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: 
9/4/2013 Page 2 of 5 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0839 Assessor: Wong/BC 

ENVIRONMENTAL RELEASES 

 Scenario#:1 Number of Release Sites: 

 Release Activity: USE: Max LADD 

 Release Description: WATER LANDFILL 

Non-sludge/Sludge 

STACK FUGITIVE 

Total Releases: 

 (k g/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: 
9/4/2013 Page 3 of 5 

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0839 

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES 

SCENARIO #: 1 ACTIVITY: USE: 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)

 Negl igible 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) 9.24E-04 30.00 75.00 71.80 1.40 

LADCpot (mg/L) 4.74E-02 30.00 75.00 NA NA 

REMARKS: 

 
9/4/2013 Page 4 of 5 

INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0839 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 1 RELEASE ACTIVITY: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): 

0.00 μg/ m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): 7.35 μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 5.41E-04 N/A 30.00 75.00 71.80 0.55 

LADCpot (mg/m3) 2.94E-03 N/ A 30.00 75.00 NA NA 

Acute 

ADRpot (mg/kg/day) N/A N/A NA 1 day 71.80 0.55 

Inhalation Comments: 
9/4/2013 Page 5 of 5 

 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 

 

 Do wnwash Information: 

Facility Length: NA m 

Facility Width: NA m 

Facility Height: NA m