PUBLIC HEALTH ASSESSMENT
ROCKY MOUNTAIN ARSENAL
ADAMS COUNTY, COLORADO
CERCLIS NO. CO5210020769
September 30, 1996
Prepared by
AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY
Division of Health Assessment and Consultation
Federal Programs Branch
Defense Facilities Assessment Section
ENVIRONMENTAL CONTAMINATION AND OTHER HAZARDS
APPENDIX A: ATSDR PUBLIC HEALTH HAZARD CONCLUSION CATEGORIES
APPENDIX B: DISCUSSION OF TOXICOLOGIC EVALUATION FOR TABLES 13 AND 14
APPENDIX C: ADDITIONAL INFORMATION RELATING TO COMMUNITY HEALTH CONCERNS
APPENDIX D: PUBLIC COMMENTS
LIST OF FIGURES
Figure 1 - Location of Rocky Mountain Arsenal
Figure 2 - The Onpost and Offpost Operable Units (OU)
Figure 3 - The Onpost Operable Unit: Site Facilities and Locations
Figure 4 - Rocky Mountain Arsenal Wind Rose
Figure 5 - The generalized extent of groundwater contamination plumes in the Offpost
Study Area, Rocky Mountain Arsenal
Figure 6 - Distribution of DIMP in the Offpost Study Area, 1990.
Figure 7 - Distribution of Dieldrin in the Offpost Study Area, 1990.
Figure 8 - General Trend for the Nitrate Levels in the RMA Offpost Study Area
Figure 9 - Historical Decline in the Concentration of DIMP, Offpost Study Area, RMA
Figure 10 - Access Restriction Areas, RMA
LIST OF TABLES
Table 1 - Contaminated Sites and Interim Response Actions
Table 2 - Interim Response Actions (IRAs) and Boundary Containment Systems (BCSs)
Table 3 - Rocky Mountain Arsenal Population and Housing Data Table
Table 4 - Summary of Remaining Pathways - Environmental Media and Mitigative Measures
Table 5A - Alluvial/Unknown Aquifer Drinking Water Contaminants of Potential Concern - Offpost Study Area
Table 5B - Denver/Arapahoe Aquifer Drinking Water Contaminants of Potential Concern - Offpost Study Area
Table 6 - Contaminants of Potential Concern: Onpost Alluvial Aquifer Groundwater Contributing to Irondale/Western Plume
Table 7 - Contaminants of Potential Concern: Off-Post Alluvial Aquifer Groundwater - Irondale/Western Plume
Table 8 - Contaminants of Potential Concern: Surface Water
Table 9 - Contaminants of Potential Concern: Surface Soil
Table 10 - Contaminants of Potential Concern: Sediment
Table 11 - Contaminants of Potential Concern: Air
Table 12A - Historical Range of Contaminants Detected in On- and Offpost Biota
Table 12B - Onpost contaminant accumulation: 1994 Biomonitoring Program
Table 13 - Recent (1991-1996) detections of drinking water well contaminants at levels
of potential concern: Alluvial/Unknown Aquifer
Table 14 - Recent detections of drinking water well contaminants at levels of potential
concern: Arapahoe Aquifer
Table 15 - Completed Exposure Pathways
Table 16 - Onpost surface soil contamination above comparison values
Table 17 - Detections of irrigation well contaminants at levels of potential concern:
Alluvial/Unknown Aquifer
Table 18 - Potential Present and Future Exposure Pathways
Table 19 - Offpost Study Area Wells of Public Health Concern, April 1994
GLOSSARY
| 111TCE 112TCE 12DCE 11DCLE 12DCLE ac ALDRN Army AS Atm ATSDR ATZ BCHPD BCS BEMA BDL °C CAR CCL4 CD CDM CDPHE CERCLA cfs CFS CHCL3 CL6CP CLC6H5 CLDAN cm CMP CO COC CPMS CPMSO CPMS02 CR CREG CRL CSC CU CV DBCP DCPD DCA DCE 12DCLE DCPD DDE DDT DDVP DIMP DITH DL DLDRN DMMP DOD DOJ dscm EA EBASCO EMEG EMPA ENDRN EPA ESA ESE °F FFA FS FS ft ft2 FY g GB GC GWTF HARP HASC HASP HG HLA IBCS ICP ICP metals ICS IMPA IRA A IRA IRDMIS IRP IWTP kg lbs LTHA L-THA MCL MCLG µg µg/dL µg/l mg mg/L ml ml/g MKE MRL MW m MS msl N/A ND NBCS NCSA ng NIT NWBCS NPL OAS OCP ONC OPHGB OPHP OSCH OSCM OSHA OU PAH PB PMRMA PAH PCB pH PHA ppb ppm PRL QA QAP QC RAB RDA RfC RfD RfDC RI RIC RI/FS RISR RLSA RMA RMACCPMT RMAED RMEG SSAB SACWSD SAR Shell SHO SPSA sq sq mi SVOC SA TAL TCA TCHD TCL TCLEE TIC TMP TRCLE Tri-County TSP USAEC USDA-SCS UFS USFWS USCS USGS UST UXO VAO VHC VHO VOC WSA yd2 yd3 |
1,1,1-Trichloroethane 1,1,2-Trichloroethane 1,1-Dichloroethene 1,1-Dichloroethane 1,2-Dichloroethane acre(s) Aldrin U.S. Department of the Army Arsenic atmosphere/s Agency for Toxic Substances and Disease Registry Atrazine Bicycloheptadiene Boundary Containment System Bald Eagle Management Area below detection limit degrees Celsius Contamination Assessment Report Carbon tetrachloride Cadmium Camp, Dresser, and McKee, Inc. Colorado Department of Public Health & Environment Comprehensive Environmental Response, Compensation and Liability Act cubic feet per second confined flow system Chloroform Hexachlorocyclopentadiene Chlorobenzene Chlordane centimeters Comprehensive Monitoring Plan Colorado contaminants of concern Chlorophenylmethyl sulfide Chlorophenylmethyl sulfoxide Chlorophenylmethyl sulfone Chromium Cancer Risk Evaluation Guide certified reporting limit Chemical Sales Company Consumptive Use (Study) Comparison Value Dibromochloropropane Dicyclopentadiene Dichloroethane Dichloroethene l,2-Dichloroethene Dicyclopentadiene 2,2-bis(para-chlorophenyl)- 1-dichloroethene 2,2-bis(para-chlorophenyl)- 1,1-trichloroethane Vapona Diisopropylmethyl phosphonate Dithiane detection limit Dieldrin dimethylmethyl phosphonate U.S. Department of Defense U.S. Department of Justice dry standard cubic meter endangerment assessment Ebasco Services, Inc. Environmental Media Evaluation Guide Ethylmethyl phosphonic acid Endrin U.S. Environmental Protection Agency Eastern Study Area Environmental Science and Engineering, Inc. degrees Farenheit Federal Facility Agreement Feasibility Study feasibility study foot, feet square foot/feet fiscal year gram Nerve agent Sarin gas chromatography Groundwater Task Force Health Activities Recommendation Panel House Armed Services Committee Health and Safety Plan Mercury Harding Lawson Associates Irondale Boundary Containment System inductively coupled plasma metals analyzed for by ICP: including cadmium, chromium, copper, lead and zinc Irondale Containment System Isopropylmethyl phosphonic acid Groundwater Intercept and Treatment System North of RMA Interim Response Action Installation Restoration Data Management Information System Installation Restoration Program Industrial Wastewater Treatment Plant kilogram pounds Lifetime Health Advisory Longer-term Health Advisory Maximum Contaminant Level (drinking water) Maximum Contaminant Level Goal (drinking water) microgram/s micrograms per deciliter micrograms per liter milligram/s milligrams per liter milliliter/s milliliter per gram Morrison-Knudsen Engineering Maximum Risk Level Monitoring Well meter mass spectroscopy mean sea level not applicable not detected North Boundary Containment System North Central Study Area nanogram Nitrate-nitrite, non-specific Northwest Boundary Containment System National Priorities List Organizations and State (EPA, Shell, Army, USFWS, and the State) organochlorine pesticide organonitrogen compounds organophosphorous compounds, GB-related organophosphorous compounds, pesticide-related organosulfur compounds, herbicide-related organosulfur compounds, mustard-agent-related Occupational Safety and Health Administration operable unit polynuclear aromatic hydrocarbons Lead Program Manager for Rocky Mountain Arsenal Polycyclic Aromatic Hydrocarbon Polychlorinated Biphenyl measure of acidity or alkalinity Public Health Assessment Parts Per Billion Parts Per Million Potential Release Location quality assurance Quality Assurance Plan quality control Restoration Advisory Board Rcommended Daily Allowance Reference Concentration Reference Dose Reference Dose Concentration Remedial Investigation Rocky Mountain Information Center Remedial Investigation/Feasibility Study Remedial Investigation Summary Report R.L. Stollar Associates Rocky Mountain Arsenal Rocky Mountain Arsenal Contamination Control Program Management Team Rocky Mountain Arsenal Environmental Database Reference Dose Media Evaluation Guide Site-Specific Advisory Board South Adams County Water and Sanitation District Study Area Report Shell Chemical Company/Shell Oil Company semivolatile halogenated organics South Plants Study Area square square mile/s semivolatile organic compound Study Area Target Analyte List Trichloroethane Tri-County Health Department Target Compound List Tetrachloroethene (PCE) tentatively identified compound Transition Monitoring Program Trichloroethene/trichloroethylene (TCE) Tri-County Health Department total suspended particulates U.S. Army Environmental Center U.S. Department of Agriculture-Soil Conservation Service unconfined flow system U.S. Fish and Wildlife Service Unified Soil Classification System United States Geological Survey Underground Storage Tank Unexploded Ordinance volatile aromatic organics volatile hydrocarbons volatile halogenated organics volatile organic compound Western Study Area square yard/s cubic yard/s |
