3/13/2013 Page 1 of 10

INITIAL REVIEW EXPOSURE REPORT (IRExR)

Chemical ID: P-13-0292 Reviewer: Kwon/SD 

 

 

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 = 

1000

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

Use: Max 

ADR

9.35E+00 --- 1.10E-01 --- --- --- --- 2.70E-01 --- --- ---

Use: Max 

LADD

--- 6.27E-02 --- 8.49E-04 --- --- 1.92E-02 --- 8.82E-03 --- ---

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: 

Results Table: Exposure Based (XB)/Persistent (P2B2) Criteria

Parameter Exp Based Persistent Exceedance Value

Drinking (Surface) Water Dose (mg/kg/day) Yes NA 6.27E-02

Fish Ingestion Dose (mg/kg/day) No NA

Inhalation Dose (mg/kg/day) Yes NA 8.82E-03

Groundwater Dose (mg/kg/day) Yes NA 1.92E-02

Surface Water Release After Treatment (kg/yr) NA

Total Release After Treatment (kg/yr) NA

Consumer Use? No

Fate test recommendations?: (default is NA)
3/13/2013 Page 2 of 10

 INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-13-0292 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#:1 Number of Release Sites: 

Release Activity: 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: 
3/13/2013 Page 3 of 10

INITIAL REVIEW EXPOSURE REPORT

 Chemical ID: P-13-0292

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

SCENARIO #: 1 Number of Sites: RELEASE ACTIVITY:Use: Max 

ADR

SIC-CODE DESCRIPTION: POTW's (All facilities)

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 3.16

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 50 125.56 44.02 26.80 22.53 1728.26 4929.58 8097.01 9631.60

ALL 10 11.11 1.94 1.06 0.96 1.95E+04 1.12E+05 2.05E+05 2.26E+05

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 3.69E-05 4.17E-04 mg/kg/day 5.00E-07 5.65E-06 mg/kg/day

LADCpot 1.89E-03 2.14E-02 mg/L 5.98E-03 6.76E-02 mg/kg

Acute

ADRpot 0.41 9.35 mg/kg/day 9.81E-03 0.11 mg/kg/day

SIC Code Comments: 
3/13/2013 Page 4 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-13-0292

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 1 RELEASE ACTIVITY: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):

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): 0.80 μg/m3

Max 24 Hour Average Air Concentration (Stack): 1460.00 μg/m3

Exposure Units

Results

(Stack)

Results

(Fugitive)

ASSUMPTIONS

ED

(years) 

AT

(years)

BW

(kg)

Inh. Rate 

(m3/hr)

Cancer

LADDpot (mg/kg/day) 5.89E-05 N/A 30.00 75.00 71.80 0.55

LADCpot (mg/m3) 3.20E-04 N/A 30.00 75.00 NA NA

Acute

ADRpot (mg/kg/day) 0.27 N/A NA 1 day 71.80 0.55

Inhalation Comments: 
3/13/2013 Page 5 of 10

 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
3/13/2013 Page 6 of 10

 INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-13-0292 Assessor: Kwon/SD

ENVIRONMENTAL RELEASES

Scenario#:2 Number of Release Sites: 

Release Activity: 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: 
3/13/2013 Page 7 of 10

INITIAL REVIEW EXPOSURE REPORT

 Chemical ID: P-13-0292

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

SCENARIO #: 2 Number of Sites: RELEASE ACTIVITY:Use: Max 

LADD

SIC-CODE DESCRIPTION: POTW's (All facilities)

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 3.16

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 50 125.56 44.02 26.80 22.53 N/A N/A N/A N/A

ALL 10 11.11 1.94 1.06 0.96 N/A N/A N/A N/A

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 5.55E-03 6.27E-02 mg/kg/day 7.51E-05 8.49E-04 mg/kg/day

LADCpot 0.28 3.22 mg/L 0.90 10.16 mg/kg

Acute

ADRpot N/A N/A mg/kg/day N/A N/A mg/kg/day

SIC Code Comments: 
3/13/2013 Page 8 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-13-0292

DRINKING WATER EXPOSURE ESTIMATES FROM LANDFILL RELEASES

SCENARIO #: 2 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)

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 

 

 Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

IR

(L/day)

Cancer

LADDpot (mg/kg/day) 1.92E-02 30.00 75.00 71.80 1.40

LADCpot (mg/L) 0.98 30.00 75.00 NA NA

REMARKS:

 
3/13/2013 Page 9 of 10

INITIAL REVIEW EXPOSURE REPORT

Chemical ID: P-13-0292

INHALATION EXPOSURE ESTIMATES (POST-TREATMENT)

SCENARIO #: 2 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/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): 120.00 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) 8.82E-03 N/A 30.00 75.00 71.80 0.55

LADCpot (mg/m3) 4.80E-02 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: 
3/13/2013 Page 10 of 10

 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