7/26/2013 Page 1 of 8 

INITIAL REVIEW EXPOSURE REPORT (IRExR) 

 Chemical ID: P-13-0453 Reviewer: Tobias/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 = 5 

PDM 

Days 

Exceede

d 

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: max 

acute eco 

2.18E-03 --- 1.09E-02 --- 4.76E+01 --- --- --- --- --- --- 

USE: PDM1 --- --- --- --- 4.70E-01 1 --- --- --- --- --- 

USE: Max 

LADD 

--- 1.01E-06 --- 5.80E-06 --- --- --- --- --- --- --- 

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: 
7/26/2013 Page 2 of 8 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0453 Assessor: Tobias/BC 

ENVIRONMENTAL RELEASES 

 Scenario#:1 Number of Release Sites: 6. 

 Release Activity: USE: Max ADR 

 Release Description: WATER LANDFILL 

Non-sludge/Sludge 

STACK FUGITIVE 

Total Releases: 9.70 N/A N/A N/A 

 (kg/yr) (kg/yr) (kg/yr) (kg/yr) 

 

 Non-sludge/Sludge 

Release Days/yr: 8.00 0.00/0.00 N/A N/A 

Per Site Release: 0.20 N/A/0.00 N/A N/A 

 (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day) 

Remarks: 
7/26/2013 Page 3 of 8 

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-13-0453 

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

SCENARIO #: 1 Number of Sites: 6 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) 

75.00 8. 0.202 5.05E-02 0.00 1340.00 

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 50 125.56 44.02 26.80 22.53 0.40 1.15 1.88 2.24 

ALL 10 11.11 1.94 1.06 0.96 4.55 26.03 47.64 52.60 

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 6.88E-08 7.77E-07 mg/kg/day 3.95E-07 4.46E-06 mg/kg/day 

LADCpot 3.53E-06 3.99E-05 mg/L 4.73E-03 5.34E-02 mg/kg 

Acute 

ADRpot 9.59E-05 2.18E-03 mg/kg/day 9.68E-04 1.09E-02 mg/kg/day 

SIC Code Comments: 
7/26/2013 Page 4 of 8 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0453 Assessor: Tobias/BC 

ENVIRONMENTAL RELEASES 

 Scenario#:2 Number of Release Sites: 6. 

 Release Activity: USE: PDM1 

 Release Description: WATER LANDFILL 

Non-sludge/Sludge 

STACK FUGITIVE 

Total Releases: 3.00 N/A N/A N/A 

 (kg/yr) (kg/yr) (kg/yr) (kg/yr) 

 

 Non-sludge/Sludge 

Release Days/yr: 250.00 0.00/0.00 N/A N/A 

Per Site Release: 2.00E-03 N/A/0.00 N/A N/A 

 (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day) 

Remarks: 
7/26/2013 Page 5 of 8 

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-13-0453 

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

SCENARIO #: 2 Number of Sites: 6 RELEASE ACTIVITY:USE: 

PDM1 

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) 

75.00 250. 0.002 5.00E-04 0.00 1340.00 

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 50 125.56 44.02 26.80 22.53 3.98E-03 1.14E-02 1.87E-02 2.22E-02

ALL 10 11.11 1.94 1.06 0.96 4.50E-02 0.26 0.47 0.52 

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 2.13E-08 2.40E-07 mg/kg/day 1.22E-07 1.38E-06 mg/kg/day 

LADCpot 1.09E-06 1.23E-05 mg/L 1.46E-03 1.65E-02 mg/kg 

Acute 

ADRpot 9.49E-07 2.15E-05 mg/kg/day 9.59E-06 1.08E-04 mg/kg/day 

SIC Code Comments: 
7/26/2013 Page 6 of 8 

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-13-0453 

SIC CODE EXPOSURES TO SURFACE WATER RELEASES 

SCENARIO #: 2 RELEASE ACTIVITY: USE: PDM1 

SIC CODE DESCRIPTION: POTW's (All facilities) 

ASSOCIATED SIC CODES: 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 

5.00 0 1 250.00 2.00E-03 75.00 High 
7/26/2013 Page 7 of 8 

 INITIAL REVIEW EXPOSURE REPORT 

Chemical ID: P-13-0453 Assessor: Tobias/BC 

ENVIRONMENTAL RELEASES 

 Scenario#:3 Number of Release Sites: 6. 

 Release Activity: USE: Max LADD 

 Release Description: WATER LANDFILL 

Non-sludge/Sludge 

STACK FUGITIVE 

Total Releases: 12.60 N/A N/A N/A 

 (kg/yr) (kg/yr) (kg/yr) (kg/yr) 

 

 Non-sludge/Sludge 

Release Days/yr: 1.00 0.00/0.00 N/A N/A 

Per Site Release: 2.10 N/A/0.00 N/A N/A 

 (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day) 

Remarks: 
7/26/2013 Page 8 of 8 

INITIAL REVIEW EXPOSURE REPORT 

 Chemical ID: P-13-0453 

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

SCENARIO #: 3 Number of Sites: 6 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) 

75.00 1. 2.1 0.53 0.00 1340.00 

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 50 125.56 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 8.93E-08 1.01E-06 mg/kg/day 5.13E-07 5.80E-06 mg/kg/day 

LADCpot 4.58E-06 5.18E-05 mg/L 6.14E-03 6.94E-02 mg/kg 

Acute 

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

SIC Code Comments: