September 24, 2003

INITIAL REVIEW EXPOSURE REPORT

Case Number: P030793 Assessor: Kennedy

ENVIRONMENTAL RELEASES

Scenario#: 1 Number of Release Sites: 

Release Activity:

Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE

Total Releases: 468.00 0.00 0.00 0.00 53.04

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

Release Days/yr: 78. 78. 

Per Site Release: 3.00 0.00 0.00 0.00 0.34

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

Remarks:

Consumer use expected? No, consumer use is not expected.
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

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

SCENARIO #:1 RELEASE ACTIVITY:

SIC-CODE DESCRIPTION: Plastic Products Manufacture

SIC-CODE (S):3079 EXPOSED POPULATION:Adult

WASTE WATER

TREATMENT REMOVAL 

(%)

COC

(μg/L)

RELEASE

DAYS

PRE-TREATMENT

RELEASE 

(kg/day)

POST-TREATMENT

RELEASE 

(kg/day)

BCF

(L/kg)

99. 10.00 78. 3. 3.00E-02 3.16

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT

TYPE

% ILE

FACILITY

STREAM FLOW (MLD) STREAM CONC. (:g/l)

Harmonic

MEAN 30Q5 7Q10 1Q10

Harmonic

MEAN 30Q5 7Q10 1Q10

ALL 50 421.74 151.70 99.55 81.26 7.11E-02 0.20 0.30 0.37

ALL 10 36.05 10.75 6.43 5.35 0.83 2.79 4.67 5.61

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 1.19E-07 1.39E-06 mg/kg/day 1.61E-09 1.88E-08 mg/kg/day

LADCpot 6.08E-06 7.11E-05 mg/L 1.92E-05 2.25E-04 mg/kg

Chronic Non-Cancer

ADDpot 2.96E-07 3.47E-06 mg/kg/day 4.01E-09 4.70E-08 mg/kg/day

ADCpot 1.52E-05 1.78E-04 mg/L 4.80E-05 5.62E-04 mg/kg

Acute

ADRpot 1.65E-05 2.33E-04 mg/kg/day 4.04E-07 4.72E-06 mg/kg/day
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER: P030793

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 1 RELEASE ACTIVITY:

SIC CODE DESCRIPTION: Plastic Products Manufacture

ASSOCIATED SIC CODES: 3079

SIC CODE RESULTS

COC (:g/L) % yr exceeded Days/yr

exceeded

Release

days/year

Loading

(kg/site/day)

Waste Water

Treatment (%)

High/Avg

Analysis

10.00 0.75 3 78 3.00 99.00 High
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

INHALATION EXPOSURE ESTIMATES FROM FUGITIVE RELEASES

SCENARIO #:1 RELEASE ACTIVITY:

RELEASE DESCRIPTION:

METHOD OF CALCULATION:Turner

EXPOSED POPULATION:Adult

NUMBER OF

SITES % TREATMENT TYPE OF REMOVAL

PRE-TREAT RELEASE

(kg/yr)

POST-TREAT RELEASE

(kg/yr)

2. 0.00 None 53.04 53.04

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

Inh. Rate

(m3

/hr)

Cancer

LADDpot (mg/kg/day) 9.75E-06 30.00 75.00 71.80 0.55

LADCpot (mg/m3

) 5.30E-05 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 2.44E-05 30.00 30.00 71.80 0.55

ADCpot (mg/m3

) 1.33E-04 30.00 30.00 NA NA
INITIAL REVIEW EXPOSURE REPORT

Case Number: P030793 Assessor: Kennedy

ENVIRONMENTAL RELEASES

Scenario#: 2 Number of Release Sites: 2. 

Release Activity: - Fina, Dow

Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE

Total Releases: 1396.56 0.00 0.00 0.00 45.54

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

Release Days/yr: 33. 33. 

Per Site Release: 21.16 0.00 0.00 0.00 0.69

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

Remarks: Assumed water release of 18.157 kg/site/day over 33 days overlaps with release of 3

kg/site/day over 78 days. Assumed air release of 0.3466 kg/site/day over 33 days overlaps

with release of 0.3426 kg/site/day over 78 days.

 
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

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

SCENARIO #:2 RELEASE ACTIVITY: - Fina,

Dow

SIC-CODE DESCRIPTION:Plastic Products Manufacture

SIC-CODE (S):3079 EXPOSED POPULATION:Adult

WASTE WATER

TREATMENT REMOVAL 

(%)

COC

(μg/L)

RELEASE

DAYS

PRE-TREATMENT

RELEASE 

(kg/day)

POST-TREATMENT

RELEASE 

(kg/day)

BCF

(L/kg)

99. 10.00 33. 21.16 0.21 3.16

AQUATIC EXPOSURE ESTIMATES - SURFACE WATER

PLANT

TYPE

% ILE

FACILITY

STREAM FLOW (MLD) STREAM CONC. (:g/l)

Harmonic

MEAN 30Q5 7Q10 1Q10

Harmonic

MEAN 30Q5 7Q10 1Q10

ALL 50 421.74 151.70 99.55 81.26 0.50 1.39 2.13 2.60

ALL 10 36.05 10.75 6.43 5.35 5.87 19.68 32.91 39.55

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 3.54E-07 4.14E-06 mg/kg/day 4.79E-09 5.61E-08 mg/kg/day

LADCpot 1.81E-05 2.12E-04 mg/L 5.73E-05 6.71E-04 mg/kg

Chronic Non-Cancer

ADDpot 8.84E-07 1.03E-05 mg/kg/day 1.20E-08 1.40E-07 mg/kg/day

ADCpot 4.54E-05 5.31E-04 mg/L 1.43E-04 1.68E-03 mg/kg

Acute

ADRpot 1.17E-04 1.64E-03 mg/kg/day 2.85E-06 3.33E-05 mg/kg/day
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER: P030793

SIC CODE EXPOSURES TO SURFACE WATER RELEASES

SCENARIO #: 2 RELEASE ACTIVITY: - Fina, Dow

SIC CODE DESCRIPTION: Plastic Products Manufacture

ASSOCIATED SIC CODES: 3079

SIC CODE RESULTS

COC (:g/L) % yr exceeded Days/yr

exceeded

Release

days/year

Loading

(kg/site/day)

Waste Water

Treatment (%)

High/Avg

Analysis

10.00 2.36 9 33 21.16 99.00 High
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

INHALATION EXPOSURE ESTIMATES FROM FUGITIVE RELEASES

SCENARIO #:2 RELEASE ACTIVITY:- Fina, Dow

RELEASE DESCRIPTION:

METHOD OF CALCULATION:Turner

EXPOSED POPULATION:Adult

NUMBER OF

SITES % TREATMENT TYPE OF REMOVAL

PRE-TREAT RELEASE

(kg/yr)

POST-TREAT RELEASE

(kg/yr)

2. 0.00 None 45.54 45.54

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

Inh. Rate

(m3

/hr)

Cancer

LADDpot (mg/kg/day) 8.37E-06 30.00 75.00 71.80 0.55

LADCpot (mg/m3

) 4.55E-05 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 2.09E-05 30.00 30.00 71.80 0.55

ADCpot (mg/m3

) 1.14E-04 30.00 30.00 NA NA
INITIAL REVIEW EXPOSURE REPORT

Case Number: P030793 Assessor: Kennedy

ENVIRONMENTAL RELEASES

Scenario#: 3 Number of Release Sites: 1. 

Release Activity: - Exxon, Baytown

Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE

Total Releases: 234.00 0.00 0.00 0.00 26.52

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

Release Days/yr: 78. 78. 

Per Site Release: 3.00 0.00 0.00 0.00 0.34

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

Remarks:

 
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER: P030793

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES:

LAKES, BAYS, ESTUARIES, AND OCEANS

SCENARIO #: 3 RELEASE ACTIVITY:Exxon,

Baytown

This is an active site

FACILITY NAME: EXXON CHEMICAL CO USA(BAYTOWN)

FACILITY LOCATION: BAYTOWNTX77522

RECEIVING WATER NAME: GALVESTON BAY

REACH NUMBER: 12040203003 FACILITY ON REACH: No DISCHARGE TYPE: Direct

NPDES PERMIT #: TX0077887 DATA SOURCE: FacSrch EXPOSED POPULATION: Adult

WWT REMOVAL

(%) RELEASE DAYS

PLANT FLOW

(MLD)

PRE-TREAT REL

(kg/day)

POST-TREAT REL

(kg/day)

BCF

(L/kg)

99. 78. 8.03 3. 3.00E-02 3.16

AQUATIC EXPOSURE ESTIMATES

MIXING ZONE DILUTION FACTOR WATER CONC (:g/l)

ACUTE SCENARIO 3.30 1.13

CHRONIC SCENARIO 12.50 0.30

FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

IR

 (g/day)

Cancer

LADDpot (mg/kg/day) 6.75E-09 30.00 75.00 71.80 6.00

LADCpot (mg/kg) 8.08E-05 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 1.69E-08 30.00 30.00 71.80 6.00

ADCpot (mg/kg) 2.02E-04 30.00 30.00 NA NA

Acute

ADRpot (mg/kg/day) 6.43E-06 1.00 day 1.00 day 71.80 129.00
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

INHALATION EXPOSURE ESTIMATES FROM FUGITIVE RELEASES

SCENARIO #:3 RELEASE ACTIVITY: - Exxon, Baytown

RELEASE DESCRIPTION:

METHOD OF CALCULATION:Turner

EXPOSED POPULATION:Adult

NUMBER OF

SITES % TREATMENT TYPE OF REMOVAL

PRE-TREAT RELEASE

(kg/yr)

POST-TREAT RELEASE

(kg/yr)

1. 0.00 None 26.52 26.52

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

Inh. Rate

(m3

/hr)

Cancer

LADDpot (mg/kg/day) 9.75E-06 30.00 75.00 71.80 0.55

LADCpot (mg/m3

) 5.30E-05 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 2.44E-05 30.00 30.00 71.80 0.55

ADCpot (mg/m3

) 1.33E-04 30.00 30.00 NA NA
INITIAL REVIEW EXPOSURE REPORT

Case Number: P030793 Assessor: Kennedy

ENVIRONMENTAL RELEASES

Scenario#: 4 Number of Release Sites: 1. 

Release Activity: - Exxon, Baytown

Release Description: WATER LANDFILL INCINER LAND/INCIN FUGITIVE

Total Releases: 698.28 0.00 0.00 0.00 22.77

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

Release Days/yr: 33. 33. 

Per Site Release: 21.16 0.00 0.00 0.00 0.69

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

Remarks: Assumed water release of 18.157 kg/site/day over 33 days overlaps with release of 3

kg/site/day over 78 days. Assumed air release of 0.3466 kg/site/day over 33 days overlaps

with release of 0.3426 kg/site/day over 78 days.

 
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER: P030793

SITE-SPECIFIC HUMAN AND AQUATIC EXPOSURES TO SURFACE WATER RELEASES:

LAKES, BAYS, ESTUARIES, AND OCEANS

SCENARIO #: 4 RELEASE ACTIVITY: Exxon,

Baytown

This is an active site

FACILITY NAME: EXXON CHEMICAL CO USA(BAYTOWN)

FACILITY LOCATION: BAYTOWNTX77522

RECEIVING WATER NAME: GALVESTON BAY

REACH NUMBER: 12040203003 FACILITY ON REACH: No DISCHARGE TYPE: Direct

NPDES PERMIT #: TX0077887 DATA SOURCE: FacSrch EXPOSED POPULATION: Adult

WWT REMOVAL

(%) RELEASE DAYS

PLANT FLOW

(MLD)

PRE-TREAT REL

(kg/day)

POST-TREAT REL

(kg/day)

BCF

(L/kg)

99. 33. 8.03 21.16 0.21 3.16

AQUATIC EXPOSURE ESTIMATES

MIXING ZONE DILUTION FACTOR WATER CONC (:g/l)

ACUTE SCENARIO 3.30 7.99

CHRONIC SCENARIO 12.50 2.11

FISH INGESTION EXPOSURE ESTIMATES

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

IR

 (g/day)

Cancer

LADDpot (mg/kg/day) 2.01E-08 30.00 75.00 71.80 6.00

LADCpot (mg/kg) 2.41E-04 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 5.03E-08 30.00 30.00 71.80 6.00

ADCpot (mg/kg) 6.03E-04 30.00 30.00 NA NA

Acute

ADRpot (mg/kg/day) 4.54E-05 1.00 day 1.00 day 71.80 129.00
INITIAL REVIEW EXPOSURE REPORT

CASE NUMBER:P030793

INHALATION EXPOSURE ESTIMATES FROM FUGITIVE RELEASES

SCENARIO #:4 RELEASE ACTIVITY: - Exxon, Baytown

RELEASE DESCRIPTION:

METHOD OF CALCULATION:Turner

EXPOSED POPULATION:Adult

NUMBER OF

SITES % TREATMENT TYPE OF REMOVAL

PRE-TREAT RELEASE

(kg/yr)

POST-TREAT RELEASE

(kg/yr)

1. 0.00 None 22.77 22.77

Exposure Units Results

ASSUMPTIONS

ED

(years)

AT

(years)

BW

(kg)

Inh. Rate

(m3

/hr)

Cancer

LADDpot (mg/kg/day) 8.37E-06 30.00 75.00 71.80 0.55

LADCpot (mg/m3

) 4.55E-05 30.00 75.00 NA NA

Chronic Non-Cancer

ADDpot (mg/kg/day) 2.09E-05 30.00 30.00 71.80 0.55

ADCpot (mg/m3

) 1.14E-04 30.00 30.00 NA NA