June 24, 2009 FINAL Page of 

INITIAL REVIEW EXPOSURE REPORT (IRExR) 

 Chemical ID: P090411 Reviewer: Kwon 

 

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=? 

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 

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: 

Fate test recommendations?: (default is NA) 
June 24, 2009 FINAL Page of 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P090411 Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:1 Number of Release Sites: 

 Release Activity: 

 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: 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 1 RELEASE ACTIVITY: 

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): μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 

LADCpot (mg/m3) 

Acute 

ADRpot (mg/kg/day) 

Inhalation Comments: 
June 24, 2009 FINAL Page of 

 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 
June 24, 2009 FINAL Page of 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P090411 Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:2 Number of Release Sites: 

 Release Activity: 

 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: 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 2 RELEASE ACTIVITY: 

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): μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 

LADCpot (mg/m3) 

Acute 

ADRpot (mg/kg/day) 

Inhalation Comments: 
June 24, 2009 FINAL Page of 

 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 
June 24, 2009 FINAL Page of 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P090411 Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:3 Number of Release Sites:. 

 Release Activity: 

 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: 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 3 RELEASE ACTIVITY: 

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): μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 

LADCpot (mg/m3) 

Inhalation Comments: 
June 24, 2009 FINAL Page of 

 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 
June 24, 2009 FINAL Page of 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P090411 Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:4 Number of Release Sites: 

 Release Activity: 

 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: 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 4 RELEASE ACTIVITY: 

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): μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 

LADCpot (mg/m3) 

Acute 

ADRpot (mg/kg/day) 

Inhalation Comments: 
June 24, 2009 FINAL Page of 

 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 
June 24, 2009 FINAL Page of 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P090411 Assessor: 

ENVIRONMENTAL RELEASES 

 Scenario#:5 Number of Release Sites: 

 Release Activity: 

 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: 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES 

SCENARIO #: 5 ACTIVITY: 

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 

 (%) 

 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) 

LADCpot (mg/L) 

REMARKS: 

 
June 24, 2009 FINAL Page of 

INITIAL EXPOSURE REVIEW REPORT 

Chemical ID: P090411 

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT) 

SCENARIO #: 5 RELEASE ACTIVITY: 

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): μg/m3

Max 24 Hour Average Air 

Concentration(Fugitive): 

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): μg/m3

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

ASSUMPTIONS 

Exposure Units 

Results 

(Stack) 

Results 

(Fugitive) ED 

(years) 

AT 

(years) 

BW 

(kg) 

Inh. Rate 

(m3/hr) 

Cancer 

LADDpot (mg/kg/day) 

LADCpot (mg/m3) 

Inhalation Comments: 
June 24, 2009 FINAL Page of 

 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 
June 24, 2009 FINAL Page of 

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 exceedence 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.