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### POST-FOCUS EXPOSURE REPORT This assessment was updated based on the Post-Focus Draft Revision 2 dated 7/8/2014 Chemical ID: P-14-0364 Reviewer: Bevington/BC

Results Table: Dose, Concentration, and Days Exceeded Results Summary

Exposure Scenario 1 Water Landfill Stack Air Fugitive Air
Drinking Water Fish Ingestion ADR LADD ADR LADD 7Q10 4 CC = 170 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

MFG: max acute eco --- --- --- --- 2.23E+02 --- --- --- --- --- ---

PROC: max acute eco --- --- --- --- 1.31E+01 --- --- --- --- --- ---

1 Exposure scenario titles consist of release activity followed by exposure calculation abbreviation. 2 Release activities are from engineering report's Manufact uring (Mfg), Processing (Proc) and Use release activity labels. Multiple release activities are combined in one exposu re 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: Submitter states on-site WWTP used, but not assessed.7/30/2014 Page 2 of 5

POST-FOCUS EXPOSURE REPORT

Chemical ID: P-14-0364 Assessor: Bevington/BC
ENVIRONMENTAL RELEASES
Scenario#:1 Number of Release Sites: 1. Release Activity: MFG:USE1: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: 11.30 N/A N/A N/A (kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr: 2.00 0.00/0.00 N/A N/A
Per Site Release: 5.65 N/A/0.00 N/A N/A (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

Remarks:7/30/2014 Page 3 of 5

POST-FOCUS EXPOSURE REPORT
Chemical ID: P-14-0364 SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO NUMBER:1 RELEASE ACTIVITY: MFG:USE1: Max ADR FACILITY NAME: WCRSA/LO WER REEDY RIVER PLANT
FACILITY LOCATION: GREENVILLE SC 29607
RECEIVING WATER NAME: REEDY R REACH NUMBER: 03050109053 FACILITY ON REACH: Yes DISCHARGE TYPE: Direct NPDES PERMIT #: SC0024261 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg) 50. 2. 5.65 2.83 0.00 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
FLOW DESCRIPTOR Harmonic Mean 30Q5 7Q10 1Q10 PLANT FLOW (MLD) 65.81 21.37 12.68 12.68 NA CONCENTRATION ( μ g/L) 42.92 132.22 222.79 222.79 NA

DRINKING WATER INGESTION AND FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Drinking Water Results Drinking Water Units Fish Ingestion Results Fish Ingestion Units
Cancer
LADD pot 1.83E-06 mg/kg/day 0.00 mg/kg/day
LADC pot 9.41E-05 mg/L 0.00 mg/kg
Acute
ADR pot

1.10E-02 mg/kg/day 0.00 mg/kg/day

Surface Water Comments:7/30/2014 Page 4 of 5

POST-FOCUS EXPOSURE REPORT

Chemical ID: P-14-0364 Assessor: Bevington/BC
ENVIRONMENTAL RELEASES
Scenario#:2 Number of Release Sites: 20. Release Activity: PROC:USE3: Max ADR Release Description: WATER LANDFILL Non-sludge/Sludge STACK FUGITIVE

Total Releases: 21.00 N/A N/A N/A (kg/yr) (kg/yr) (kg/yr) (kg/yr)

Non-sludge/Sludge Release Days/yr: 5.00 0.00/0.00 N/A N/A
Per Site Release: 0.21 N/A/0.00 N/A N/A (kg/site/day) (kg/site/day) (kg/site/day) (kg/site/day)

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POST-FOCUS EXPOSURE REPORT
Chemical ID: P-14-0364
SIC-CODE BASED HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES
SCENARIO #: 2 Number of Sites: 20 RELEASE ACTIVITY:PROC:USE3: Max ADR SIC-CODE DESCRIPTION: Plastic Resins & Synthetic Fiber Manufacture SIC-CODE (S): 2821,2823,2824 EXPOSED POPULATION: Adult

WWT REMOVAL (%) RELEASE DAYS PRETREATMENT RELEASE (kg/site/day) POSTTREATMENT RELEASE (kg/site/day) DWT (%) BCF (L/kg) 50.00 5. 0.21 0.10 0.00 0.00

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER
PLANT TYPE % ILE FACILITY STREAM FLOW (MLD) STREAM CONC. ( μ g/l)

Harmonic

Mean 30Q5 7Q10 1Q10 Harmonic Mean 30Q5 7Q10 1Q10
ALL 50 1321.81 604.40 403.46 328.18 7.94E-02 0.17 0.26 0.32
ALL 10 44.53 13.72 8.02 7.44 2.36 7.65 13.09 14.11

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
LADD pot 8.49E-09 2.52E-07 mg/kg/day 0.00 0.00 mg/kg/day
LADC pot 4.35E-07 1.29E-05 mg/L 0.00 0.00 mg/kg
Acute
ADR pot 1.45E-05 6.40E-04 mg/kg/day 0.00 0.00 mg/kg/day

SIC Code Comments: