PUBLIC HEALTH ASSESSMENT
NORTON AIR FORCE BASE
NORTON AIR FORCE BASE, SAN BERNARDINO, CALIFORNIA
EPA FACILITY ID: CA4570024345
May 29, 1998
Prepared by:
Federal Facilities Assessment Branch
Division of Health Assessment and Consultation
Agency for Toxic Substances and Disease Registry
TABLE OF CONTENTS
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Site Description and Operational History
Remedial and Regulatory History
Site Visits and Community Concerns
Demographics and Land Use
Quality Assurance and Quality Control
COMMUNITY HEALTH CONCERNS AND POTENTIAL EXPOSURE PATHWAYS
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Introduction
1. Concern: TCE in groundwater
2. Concern: Radioactivity in groundwater
3. Concern: Exposure to contaminated soil
4. Concern: Other Public Health Concerns
APPENDIX D: RESPONSES TO PUBLIC COMMENTS
Table 2: Population Data: Norton AFB and Surrounding Areas, 1990
Table 3: Housing Data: Norton AFB and Surrounding Areas, 1990
Table 4: Wells on and in the Vicinity of the Norton AFB TCE Plume Area
Table 5: Potential Exposure Pathways Associated With Norton AFB
Table 6: Summary of Contaminants in Norton On-Base Drinking Water Wells
Table 7: Summary of Contaminants in Riverside Municipal Drinking Water Wells
Table 8: Summary of Contaminants in Norton AFB On- Base and Off-Base Monitoring Wells
Figure 1: Regional map showing location of Norton AFB
Figure 2: Location of Installation Restoration Program Sites and Area of Concern Sites
Figure 3: Norton AFB abandoned wells and excavation locations
Figure 5: ATSDR's exposure evaluation process
Figure 6: Production wells on and in the vicinity of Norton AFB
Figure 7: Hydrostratigraphy of the Bunker Hill Groundwater Basin
Figure 8: TCE contaminant plume - August 1993
Figure 9: TCE contaminant plume - April 1995
| AAVS | Aerospace Audiovisual Services |
| ACCS | Air Combat Camera Services |
| AFB | Air Force Base |
| AOC | area of concern |
| AT | averaging time |
| ATSDR | Agency for Toxic Substances and Disease Registry |
| bgs | below ground surface |
| BW | body weight |
| CBA | Central Base Area |
| CPF | cancer potency factor |
| CREG | ATSDR's Cancer Risk Evaluation Guide |
| DCB | 1,2-dichlorobenzene |
| DCE | dichloroethylene |
| DDT | 4,4-dichlorodiphenyltrichloroethane |
| ED | exposure dose |
| EE/CA | engineering evaluation/cost analysis |
| EF | exposure frequency |
| EMEG | ATSDR's Environmental Media Evaluation Guide |
| EPA | U.S. Environmental Protection Agency |
| GAC | granular activated carbon |
| GCA | Gage Canal Area |
| GPR | ground penetrating radar |
| IR | ingestion rate |
| IRP | Installation Restoration Program |
| IWTP | Industrial Waste Treatment Plant |
| MCL | EPA's Maximum Contaminant Level |
| µg/L | micrograms per liter |
| mg/kg/day | milligram per kilogram per day |
| MLW | multilevel well |
| MRL | ATSDR's Minimal Risk Level |
| MW | monitoring well |
| NPL | National Priorities List |
| PAH | polycyclic aromatic hydrocarbon |
| PCBs | polychlorinated biphenyls |
| pCi/L | picocuries per liter |
| PCE | tetrachloroethylene |
| PHAP | public health action plan |
| ppb | parts per billion |
| ppm | parts per million |
| RAB | Restoration Advisory Board |
| RCRA | Resource Conservation and Recovery Act |
| RI | remedial investigation |
| RMEG | ATSDR's Reference Dose Media Evaluation Guide |
| SVE | soil vapor extraction |
| SWAP | satellite waste accumulation point |
| sVOC | semi-volatile organic compound |
| 1,1,1-TCA | trichloroethane |
| TCE | trichloroethylene |
| TCG | target cleanup goal |
| TCLP | Toxicity Characteristic Leaching Procedure |
| THE | total extractable hydrocarbon |
| TPH | total petroleum hydrocarbon |
| UST | underground storage tank |
| UTL | upper tolerance limit |
| VOC | volatile organic compound |