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PUBLIC HEALTH ASSESSMENT

CHEVRON CHEMICAL CO. (ORTHO DIVISION)
ORLANDO, ORANGE COUNTY, FLORIDA

CONCLUSIONS

We classify the Chevron Chemical Co. (Ortho Division) Superfund hazardous waste site as a public health hazard based on past exposures to pesticide-contaminated soil.

1. Since there was no air monitoring before 1992, we cannot assess the public health threat from inhalation of contaminated dust before 1992. Nearby residents breathed pesticide-contaminated dust during the 1992 site cleanup. We do not, however, expect any health effects because of this exposure. Because clean soil and grass cover the site, we do not expect any future exposure to pesticide-contaminated dust.

2. Contaminated ground water has spread under the Armstrong Trailer Park northeast of the site. Ground-water monitoring data, however, show that it has not reached Lake Fairview. We do not know of anyone drinking the contaminated ground water. Based on our estimates, adults would be at a low increased risk of liver cancer from chlordane if they drank the contaminated ground water over a lifetime.

3. Some long-term residents of the Armstrong Trailer Park may have for years unknowingly eaten very small amounts of chlordane-contaminated soil from their yards. People routinely eat very small amounts of soil (incidental ingestion) when they work in their yards or around the house and don't wash their hands before smoking, eating, etc. We estimate some of the long-term residents of the Armstrong Trailer Park have a moderately increased risk of liver cancer because of unknowingly having eaten very small amounts of chlordane-contaminated soil. Since Chevron cleaned up the chlordane-contaminated soil in 1994, we estimate the increased cancer risk from exposure since then is insignificant.

4. Some nearby residents are concerned that their health may have been affected by exposure to contaminated dust, ground water, and surface water. Since there is no air monitoring data, we do not know the public health threat from breathing contaminated dust before 1992. We do not expect any health effects from exposure to pesticide-contaminated dust during the 1992 site cleanup. Clean soil and grass now cover the site and we do not anticipate any future exposure to contaminated dust. We do not know of anyone drinking contaminated ground water at or near this site. Based on our estimates, some adults in the Armstrong Trailer Park would be at a low increased risk of cancer if they drank the chlordane-contaminated ground water over a lifetime. We did not estimate potential exposure from incidental ingestion and skin absorption of contaminants during swimming, boating, etc. in Lake Fairview. Ground-water monitoring data show that contamination has not reached Lake Fairview. Dilution, physical retardation, and biodegradation in the ground water make it impractical to predict future concentrations in this nearby lake. Without an estimate of contaminant concentration in the lake, we cannot estimate exposure or likely health effects.

RECOMMENDATIONS

Cease/Reduce Exposure Recommendations

1. Maintain the grass cover or suppress dust during any on-site activity. To prevent possible exposures to pesticide-contaminated dust, Chevron should maintain the grass cover or suppress dust during any on-site activity.

2. Prohibit any new private wells near this site or prohibit domestic use of the contaminated ground water until it meets state and federal drinking water standards for all contaminants. The Southwest Florida Water Management District should prohibit any new private wells near this site. Or, they should prohibit domestic use of the contaminated ground water until it meets all state and federal drinking-water standards.

Public Education Recommendations

3. Inform the long-term residents of the Armstrong Trailer Park that some may have a moderately increased risk of liver cancer because of unknowingly having eaten very small amounts of chlordane-contaminated soil. Inform all of the residents of the Armstrong Trailer Park that since Chevron cleaned up the chlordane-contaminated soil in 1994, we estimate the increased cancer risk from current exposure is insignificant. The Florida Department of Health and Rehabilitative Services (HRS) should educate the long-term residents of the Armstrong Trailer Park. Florida HRS should inform them that some may have a moderately increased risk of liver cancer because of unknowingly having eaten very small amounts of chlordane-contaminated soil. Florida HRS should also inform the residents of the Armstrong Trailer Park that since Chevron cleaned up the chlordane-contaminated soil in 1994, the increased cancer risk from exposure since that time is insignificant.

4. Inform the community of the results of this public health assessment. The Florida Department of Health and Rehabilitative Services should inform the community of the results of this public health assessment.

Health Activities Recommendation Panel (HARP) Recommendations

The Comprehensive Environmental Response Compensation and Liability Act of 1980 (CERCLA), as amended, requires the ATSDR to perform public actions needed at hazardous waste sites. To decide if the ATSDR should act, ATSDR's Health Activities Recommendation Panel (HARP) has evaluated the data and information developed in the Chevron Chemical Co. (Ortho Division) Public Health Assessment.

The Panel has decided that the following actions are needed at this site:

1. Community health education is needed to inform nearby residents of the long-term health risk from past exposure to contaminants from this site.

If information becomes available indicating exposure at levels of concern, the ATSDR will evaluate that information to decide what actions, if any, are necessary.

PUBLIC HEALTH ACTIONS

This section describes what the ATSDR and/or the Florida HRS will do at the Chevron Chemical Co. (Ortho Division) site after the completion of this public health assessment report. The purpose of a Public Health Action Plan is to reduce any existing health hazards and to prevent any from occurring in the future. The ATSDR and/or the Florida HRS will do the following:

1. The Florida Department of Health and Rehabilitative Services (HRS) will inform the long-term residents of the Armstrong Trailer Park that some may have a moderately increased risk of liver cancer because of unknowingly having eaten very small amounts of chlordane-contaminated soil. Florida HRS will also inform the residents of the Armstrong Trailer Park that since Chevron cleaned up the chlordane-contaminated soil in 1994, the increased cancer risk from exposure since that time is insignificant.

2. The Florida Department of Health and Rehabilitative Services will inform the community of the results of this public health assessment.

The ATSDR and/or the Florida HRS will reevaluate the Public Health Action Plan when new environmental, toxicological, or health outcome data are available.

PREPARER OF REPORT

E. Randall Merchant
Biological Administrator
Office of Toxicology and Hazard Assessment
Florida Department of Health and Rehabilitative Services

The ATSDR Technical Project Officer:

Richard Kauffman
Remedial Programs Branch
Division of Health Assessment and Consultation

The ATSDR Regional Representative:

Bob Safay
Regional Services
Office of the Assistant Administrator

CERTIFICATION

The Florida Department of Health and Rehabilitative Services (HRS) prepared this Chevron Chemical Co. (Ortho Divisioin) public health assessment under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR). Florida HRS followed approved methodology and procedures existing when they began this public health assessment.

Technical Project Officer, SPS, RPB, DHAC

The Division of Health Assessment and Consultation, ATSDR, has reviewed this public health assessment, and concurs with its findings.

Director, DHAC, ATSDR



REFERENCES

ACGIH 1993. American Conference of Governmental Industrial Hygienist. Guide to Occupational Exposure Values-1993. Cincinnati, Ohio.

ATSDR 1989a. Toxicological Profile for Chlordane. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service. ATSDR/TP-89/06.

ATSDR 1989b. Toxicological Profile for p,p'-DDT, p,p'-DDE, and p,p'-DDD. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service. ATSDR/TP-89/08.

ATSDR 1989c. Toxicological Profile for Heptachlor/Heptachlor Epoxide. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service. ATSDR/TP-88/16.

ATSDR 1990. Health Consultation from Dennis Jones to Chuck Pietrosewicz. January 16, 1990

ATSDR 1991. Memorandum from Chuck Pietrosewicz to Larry Brannen, EPA regarding soil cleanup goals at the Chevron Chemical Site, Orlando, Florida. April 11, 1991.

ATSDR 1992a. Public Health Assessment Guidance Manual (March). Atlanta, GA: U.S. Public Health Service, Agency for Toxic Substances and Disease Registry.

ATSDR 1992b. Draft Update Toxicological Profile for Chlordane. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service.

ATSDR 1992c. Draft Update Toxicological Profile for p,p'-DDT, p,p'-DDE, and p,p'-DDD. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service.

ATSDR 1992d. Public Health Assessment Guidance Manual (March). Atlanta, GA: U.S. Public Health Service, Agency for Toxic Substances and Disease Registry.

ATSDR 1993a. Update Toxicological Profile for Aldrin/Dieldrin. Agency for Toxic Substances and Disease Registry, U.S. Public Health Service. ATSDR/TP-92/01.

ATSDR 1993b. Update Toxicological Profile for Heptachlor/Heptachlor Epoxide. Agency forToxic Substances and Disease Registry, U.S. Public Health Service. ATSDR/TP-92/11.

ATSDR 1993c. Comparison Value Tables for Drinking Water, Soil, and Air (Expiring 12/31/94). Atlanta, GA: U.S. Public Health Service, Agency for Toxic Substances and Disease Registry.

ATSDR 1994. Comparison Value Tables for Drinking Water, Soil, and Air (Expiring 9/30/94). Atlanta, GA: U.S. Public Health Service, Agency for Toxic Substances and Disease Registry.

B&V 1994. Black & Veatch Waste Science and Technology Corp. Draft Baseline Risk Assessment for Chevron Orlando Site. Prepared for the Environmental Protection Agency, Region IV, contract no. 68-W9-005.

BOC 1990. Bureau of Census, U.S. Department of Commerce, Washington, D.C. 1990 Census Data Files.

Brown and Caldwell 1990a. Contamination Assessment Report for the Chevron Chemical Company Site, Orlando, Florida. December 1990.

Brown and Caldwell 1990b. Memorandum from Carolyn McCreedy and Russell Bowen to Nancy Starosciak, Chevron Chemical Company. June 13, 1990.

Brown and Caldwell 1992. Removal Action Report for the Chevron Chemical Site. December 17, 1992.

Chevron 1993a. Chevron Research and Technology. Memorandum to R.M. Wilkenfeld from L.M. Cook concerning soil concentration of chlordane. October 28, 1993.

Chevron 1993b. Progress Report #5, Chevron Chemical Company Site, Orlando, Florida. Submitted to EPA June 1, 1993.

Chevron 1994a. Progress Report #16, Chevron Chemical Company Site, Orlando, Florida. Submitted to EPA May 5, 1994.

Chevron 1994b. Progress Report #17, Chevron Chemical Company Site, Orlando, Florida. Submitted to EPA June 3, 1994.

Dames & Moore 1983. Confidential Report, Survey and Assessment of Former Agricultural Chemical Plant Site, Orlando, Florida for Chevron Chemical Company. January 10, 1983. 3818-068-09.

EPA 1990. Hazardous Substances in Our Environment; A Citizen's Guide to Understanding Health Risks and Reducing Exposure (September). Washington, DC: U.S. Environmental Protection Agency. EPA/230/09/90/081.

EPA 1991. Environmental Protection Agency. Site Analysis-Chevron Chemical. TS-PCI-90924.

Hayes et al. 1956. Hayes W, Durham W, Cueto C. 1956. The effect of known repeated oral doses of chlorinophenothane (DDT) in man. JAMA 162:890-897.

ICF Kaiser 1993. Draft Baseline Risk Assessment (December 13) for the Wingate Site [in] Fort Lauderdale, Florida. Fairfax, VA: ICF Kaiser Engineers, Inc, pp. 33-35, 64-68.

Jammal & Associates 1987. Preliminary Contamination Assessment, Central Florida Mack Truck Company, Orange County, Florida. January 15, 1987. Project No. 87-03001.

Kamrin 1988. Toxicology - A Primer on Toxicology Principles and Applications. Chelsea MI: Lewis Publishers, 11-12, 36-37.

Khasawinah and Grutsch 1989a. Chlordane thirty month tumorigenicity and chronic toxicity test in rats. Reg Toxicol Pharmacol 10:95-109.

Khasawinah and Grutsch 1989b. Chlordane 24-month tumorigenicity and chronic toxicity test in mice. Reg Toxicol Pharmacol 10:244-254.

NJDEP 1990. Improving Dialogue with Communities. New Jersey Department of Environmental Protection, Division of Science and Research, Trenton, NJ.

NUS 1990. NUS Corporation. Final Screening Site Inspection Report for Chevron Chemicals, Inc., Orange County, Florida. EPA ID#FLD004064242. July 2, 1990.

Orange CPHU 1993. Orange County Public Health Unit, Environmental Health Section. Personal Communication.

Orange CPHU 1994. Orange County Public Health Unit, Environmental Health Section. Personal Communication.

PTI 1993. PTI Environmental Services. Phase II Data Report. Orange Blossom Trail Site, Orlando, Florida. PTI Contract C460-03-01.

PTI 1994. PTI Environmental Services. Phase III Data Report: Trailer Park Soil Analyses. Orange Blossom Trail Site, Orlando, Florida. PTI Contract C460-04-01.

Task 1994a. TASK Environmental, Inc. Remedial Investigation, Superfund Accelerated Cleanup Model, Chevron Chemical Company Site, Orlando, Florida. May 31, 1994.

Task 1994b. TASK Environmental, Inc. Draft Feasibility Study. Chevron Chemical Company Site, Orlando, Florida. July 1994.

Vesicol 1983a. Thirty month chronic toxicity and tumorigenicity test in mice by chlordane technical. Unpublished study by Research Institute for Animal Science in Biochemistry and Toxicology (RIASBT), Japan.

Vesicol 1983b. Twenty-four month chronic toxicity and tumorigenicity test in mice by chlordane technical. Unpublished study by Research Institute for Animal Science in Biochemistry and Toxicology (RIASBT), Japan.

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