PUBLIC HEALTH ASSESSMENT
NAVAL AIR WARFARE CENTER
[a/k/a NAVAL AIR DEVELOPMENT CENTER (8 WASTE AREAS)]
WARMINSTER TOWNSHIP, BUCKS COUNTY, PENNSYLVANIA
EPA FACILITY ID: PA6170024545
September 25, 2002
Prepared by:
Federal Facilities Assessment Branch
Division of Health Assessment and Consultation
Agency for Toxic Substances and Disease Registry
TABLE OF CONTENTS
- Site Description
Operational History
Remedial and Regulatory History
ATSDR Involvement
Land Use and Demographics
Quality Assurance and Quality Control
EVALUATION OF ENVIRONMENTAL CONTAMINATION AND POTENTIAL EXPOSURE PATHWAYS
- Evaluation of Groundwater Exposure Pathway
- Hydrogeology
On-Base NAWC Water Supply Wells
Off-Base Municipal Supply Wells
Off-Base Private Wells
Off-Base Municipal and Private Wells Affected by Off-Base Sources
- Land Use
Soil Contamination Sites Located in Restricted Areas
Soil Contamination Sites Located in the Shenandoah Woods Housing Complex
- APPENDIX A: Site Evaluation Table
APPENDIX B: Comparison Values
APPENDIX C: Estimated Exposures and Health Effects
APPENDIX D: Estimated Exposures and Health Effects for the Casey Village Neighborhood
APPENDIX E: ATSDR Plain Language Glossary of Environmental Health Terms (Revised December 1999)
APPENDIX F: Responses to Public Comments
Table 1. Population and Housing Data Table
Table 2. Completed Exposure Pathways at NAWC Warminster
Table 3. Completed Exposure Pathways from Water Supplies Affected by Off-Base Sources
Table 4. NAWC Past and Current Water Supply Wells
Table 7. Summary of Surface Soil Data that Exceed Comparison Values
Table 8. Summary of Surface Water Data that Exceed Comparison Values
Table 9. Summary of Sediment Data that Exceed Comparison Values
Figure 2: NAWC, Area Designations, and Surrounding Neighborhoods
Figure 3: Demographic Statistics
Figure 4: ATSDR's Exposure Evaluation Process
Figure 5: Fracture Trace Location Map
| ATSDR | Agency for Toxic Substances and Disease Registry |
| bgs | below ground surface |
| BTEX | benzene, toluene, ethylbenzene, and xylenes |
| BRAC | Base Realignment and Closure |
| CERCLA | Comprehensive Environmental Response, Compensation, and Liability Act |
| CPF | cancer potency factor |
| CREG | cancer risk evaluation guide |
| CV | comparison value |
| 1,1-DCE | 1,1-dichloroethene |
| cis-1,2-DCE | cis-1,2-dichloroethene |
| EMEG | environmental media evaluation guide |
| EPA | U.S. Environmental Protection Agency |
| FFTA | Fire-Fighting Training Area |
| FS | feasibility study |
| HWA | Hatboro Water Authority |
| LOAEL | lowest-observed-adverse-effect-level |
| MCL | maximum contaminant level |
| MCS | medium-specific concentrations |
| mg/kg/day | milligram contaminant per kilogram body weight per day |
| MRL | minimal risk level |
| NAWC | Naval Air Warfare Center |
| NOAEL | no-observed-adverse-effect-level |
| NPL | National Priorities List |
| OSHA | Occupational Safety and Health Administration |
| OU | operable unit |
| PADEP | Pennsylvania Department of Environmental Protection |
| PADOH | Pennsylvania Department of Health |
| PAH | polyaromatic hydrocarbon |
| PCB | polychlorinated biphenyl |
| PCE | tetrachloroethylene |
| PHA | public health assessment |
| PHAP | public health action plan |
| ppb | parts per billion |
| ppm | parts per million |
| RAB | Restoration Advisory Board |
| RBC | risk-based concentrations |
| RCRA | Resource Conservation and Recovery Act |
| RfD | reference dose |
| RI | remedial investigation |
| RMEG | reference media evaluation guide |
| ROD | record of decision |
| SMWA | Upper Southampton Municipal Water Authority |
| SSL | EPA soil screening level |
| TCE | trichloroethylene |
| USGS | U.S. Geological Survey |
| VOC | volatile organic compound |
| WHDC | Warminster Heights Development Corporation |
| WMWA | Warminster Municipal Water Authority |


