PUBLIC HEALTH ASSESSMENT
OKLAHOMA REFINING COMPANY
CYRIL, CADDO COUNTY, OKLAHOMA
Figure 1. Oklahoma Refining Company
Figure 2. Site-Specific map of the ORC
Superfund Site indicating waste sources.
Figure 3. Location of LNAPL Detected in
Rush Springs Sandstone Aquifer
Figure 4. Oklahoma Refining Company -
Active Area
Figure 5. Oklahoma Refining Company -
Inactive Area
APPENDIX II
CONTAMINANT TABLES
Only contaminants at levels of concern for which there is a completed or potential exposure pathway are discussed in the contaminant tables. For purposes of these estimations, an adult is assumed to weigh 70 kg (150 pounds), and a child is assumed to weigh 10 kg (22 lbs.).
| = | Cancer Risk Evaluation Guide | |
| = | Environmental Media Evaluation Guide | |
| = | Minimum Detection Limit | |
| = | Not Detected | |
| = | parts per million | |
| = | parts per billion | |
| = | Reference Dose Media Evaluation Guide |
|
WASTES SOURCES: ON-SITE SOILS | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON
VALUE FOR INGESTION - REFERENCE ADULT | |
| ppm | ppm | Source | |
| Arsenic | ND - 200 | 0.4 | CREG |
| Barium | 1.5 - 546 | 49,000 | RMEG |
| Beryllium | ND - 1.3 | 0.16 | CREG |
| Chromium | 1.3 - 24,020 | 700,000* | RMEG |
| Lead | 5.1 - 20,530 | None | None |
* Assumes chromium III species in soil.
|
WASTES SOURCES: ON-SITE SOILS | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON VALUE FOR INGESTION - REFERENCE ADULT | |
| ppm | ppm | Source | |
| Benzene | ND - 40 | 24 | CREG |
| Benzo(a) anthracene |
ND - 300 | None | |
| Benzo(a)pyrene | ND - 280 | 0.096 | CREG |
| Benzo(b) fluoranthene |
ND - 120 | None | |
| Benzo(k) fluoranthene |
ND - 40 | None | |
| Chrysene | ND - 456 | None | |
| Dibenzo(ah) anthracene |
ND - 34 | None | |
| Indeno(1,2,3 cd)pyrene |
ND - 84 | None | |
|
ON-SITE SURFACE SOILS | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON
VALUE FOR INGESTION - REFERENCE ADULT | |
| ppm | ppm | Source | |
| Arsenic | ND - 345 | 0.4 | CREG |
| Barium | 46 - 1446 | 49,000 | RMEG |
| Beryllium | ND - 1.4 | 0.16 | CREG |
| Chromium | 5.5 - 310 | 700,000 | RMEG |
| Lead | 6.7 - 1119 | None | |
|
ON-SITE SURFACE SOILS | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON
VALUE FOR INGESTION - REFERENCE ADULT | |
| ppm | ppm | Source | |
| Benzene | ND - 0.09 | 24 | CREG |
| Benzo(a) anthracene |
ND - 5.3 | None | |
| Benzo(a)pyrene | ND - 3.5 | 0.096 | CREG |
| Benzo(b) fluoranthene |
ND - 6.5 | None | |
| Benzo(k) fluoranthene |
ND | None | |
| Chrysene | ND - 24 | None | |
| Dibenzo(ah) anthracene |
ND | None | |
| Indeno(1,2,3 cd) pyrene |
ND | None | |
|
ON-SITE SEDIMENT | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON
VALUE FOR INGESTION - REFERENCE ADULT | |
| ppm | ppm | Source | |
| Arsenic | ND - 23 | 0.4 | CREG |
| Barium | 36.00 - 236 | 49,000 | RMEG |
| Beryllium | 0.16 | 0.16 | CREG |
| Chromium | 4.60 - 1533 | 700,000 | RMEG |
| Lead | 8.3 - 130 | None | |
| Organic compounds of concern were not detected or did not exceed comparison values in on-site sediment. | |||
INORGANIC COMPOUNDS | ||
| CONTAMINANT |
CONCENTRATION RANGE | |
| Groundwater* | Surface water | |
| ppb | ppb | |
| Arsenic | ND - 4950 | ND - 96,550 |
| Barium | ND - 6820 | 20 - 1340 |
| Beryllium | ND - 70 | ND - 160 |
| Chromium | ND - 570 | ND - 1340 |
| Lead | ND - 24,520 | ND - 610 |
| * maximum values may represent concentrations floating on
the water table in LNAPLs or in the hydrocarbon layer.
No ATSDR comparison values are listed because groundwater and surface water were and are not being used by people as drinking water. | ||
ORGANIC COMPOUNDS | ||
| CONTAMINANT |
CONCENTRATION RANGE | |
| Groundwater* | Surface water: Drainage Ditch, Seeps | |
| ppb | ppb | |
| Benzene | ND - 13,000,000 | ND - 130 |
| Benzo(a)anthracene | ND | ND - 3 |
| Benzo(a)pyrene | ND | ND - 2 |
| Benzo(b) fluoranthene |
ND | ND |
| Benzo(k) fluoranthene |
ND | ND |
| Chrysene | ND | ND - 9 |
| Dibenzo(ah) anthracene |
ND | ND |
| Indeno(1,2,3 cd) pyrene |
ND | ND |
| * maximum values may represent concentrations floating on the water table in LNAPLs or in the hydrocarbon layer. | ||
|
OFF-SITE CREEK SEDIMENT | |||
1991 REMEDIAL INVESTIGATION REPORT | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON VALUE FOR INGESTION- PICA CHILD | |
| ppm | ppm | Source | |
| Arsenic* | 3.3 - 24.5 | 0.4 | CREG |
| Barium* | ND - 170 | 140 | RMEG |
| Chromium | 7 - 21 4.70 - 17 |
2000 | RMEG |
| Lead | ND - 25 ND - 20 |
None | None |
| * Local background concentrations of arsenic and barium in creek
sediment also exceed the comparison values.
No volatile or semivolatile organic compounds exceeded comparison values for the pica child. If there is no reported concentration range for a contaminant from the 1991 RI, it was analyzed for but did not exceed a comparison value. | |||
1984 MONITORING PROGRAM: Arsenic and chromium mean conc. only 1991 REMEDIAL INVESTIGATION: Not listed because Conc. < MDL | |||
| CONTAMINANT | CONCENTRATION RANGE |
COMPARISON VALUE FOR INGESTION* | |
| ppb | ppb | Source | |
| Arsenic | ND - 280 14.03 - 67.81 |
0.02 | CREG |
| Barium | ND - 3210 | 700 | RMEG |
| Beryllium | <MDL | 0.0081 | CREG |
| Chromium | ND <CV |
10,000 | RMEG |
| Lead | <MDL | None | None |
| * Based on use as drinking water ** Local background concentrations of arsenic and barium in creek water also exceed the comparison values. No organic compounds in the 1991 RI for creek water exceeded comparison values for the pica child. | |||
PATHWAYS
TABLE I. COMPLETED EXPOSURE PATHWAYS
| PATHWAY NAME | TIME | ||||
| SOURCE | POINT(S) OF EXPOSURE |
ROUTE OF EXPOSURE |
EXPOSED POPULATION | ||
| Creek Water | Oklahoma Refining Co. (ORC) | Off site in Gladys Creek & tributaries | Incidental Ingestion, Dermal Contact |
Children/adults using (or playing in) the creek | Past* |
| Creek Sediment | ORC | Off site in Gladys Creek & tributaries | Incidental
Ingestion, Dermal Contact |
Children/adults using (or playing in) the creek | Past* |
| Ambient Air-
General air quality may be poor because of industries. |
ORC and others | On site, Off site |
Inhalation | All historical on-site workers and off-site residents in the general vicinity of the refinery during its operation | Past** |
| * Exposure could also occur in the present or future if on-site traps release contaminants to the creek or if
preventative measures are not taken during remedial activities.
** Possible current and future exposures due to the active refinery. | |||||
TABLE II. POTENTIAL EXPOSURE PATHWAYS *
| PATHWAY NAME |
TIME* | ||||
| SOURCE | POINT OF EXPOSURE | ROUTE OF EXPOSURE | EXPOSED POPULATION | ||
| Waste Material | Oklahoma Refining Co. (ORC) | On-site pits, ponds, traps | Inhalation, Ingestion, Dermal Contact |
Site workers, Trespassers |
Primarily Past |
| Sediment | ORC | On-site drainage ditch & banks above Gladys Creek | Ingestion, Dermal Contact |
Site workers, Trespassers |
Primarily Past |
| Soils | ORC | near tanks, north of railroad, exclusive of waste impoundments | Ingestion, Dermal Contact, Inhalation |
Site workers, Trespassers |
Primarily Past |
| Surface Water | ORC | On-site ponds & traps | Dermal Contact | Site workers, Trespassers |
Primarily Past |
| Groundwater | ORC | Residences | Dermal Contact, Inhalation |
Residents | Future** |
| Food Chain | ORC | Off site in nearby fields irrigated with creek water. On site. | Ingestion | Those eating crops or cattle fed crops from lands irrigated by Gladys Creek water during the ORC operation. | Past |
| * During remedial activities at the site, we have assumed that on-site remedial workers will be adequately protected and
that appropriate measures and controls will be used to insure the protection of public health. We have also assumed that
appropriate deed restrictions will be applied to prevent future exposure to on-site contaminants.
**Future exposures could occur if contamination migrated off-site and private wells in the contaminated area were still used for non-potable purposes. | |||||
TABLE III. ESTIMATED POPULATION FOR COMPLETED AND POTENTIAL EXPOSURE PATHWAYS
| Exposed Populations and Potentially Exposed Populations | Affected by a Completed or Potential Exposure Pathway* For: | |||
| Location | Approx. No. of Persons |
Heavy Metals (lead, chromium etc.) | PAHs | |
| Residents downstream of ORC on Gladys Creek Past | 20 | Creek Sediment |
No record | |
| Other nearby residents during operation of ORC | with on-site exposure (intruders) |
25 | Air Soil Surface Water Food chain |
Air Soil Surface Water |
| without on-site exposure | 500 | Air Soil Food chain |
Air | |
| Previous Refinery Workers | 250 | Air Soil Surface Water |
Air Soil Surface Water | |
| Current Refinery Workers | 100? | Possibly Air, Soil Surface Water |
Possibly Air, Soil Surface Water | |
* potential exposure pathways are shown in italics
PUBLIC HEALTH EDUCATION FACT SHEET
The following section was not availablein electronic format for conversion to HTML at the time of preparation of this document. To obtain a hard copy of the document, please contact:
Agency for Toxic Substances and Disease Registry
Division of Health Assessment and Consultation
Attn: Chief, Program Evaluation, Records, and Information Services
Branch, E-56
1600 Clifton Road NE, Atlanta, Georgia 30333
