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Health Assessment for Martin Marietta-Denver Aerospace (Martin Marietta Astronautics Group), Jefferson County, Colorado, Region 8. CERCLIS No. 08C0D001704790

机译:马里兰玛丽埃塔 - 丹佛航空航天公司(马里埃玛丽塔航天集团)的健康评估,科罗拉多州杰斐逊县,地区8. CERCLIs No. 08C0D001704790

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Martin Marietta-Denver Aerospace, renamed Martin Marietta Astronautics Group (MMAG) in 1988, is a 5200-acre site located six miles south of the Denver County line in southern Jefferson County, Colorado. The study focused on four inactive waste disposal ponds and an inactive landfill area. A limited on-site soil survey revealed contamination by 1,1,1-trichloroethane (350 micro g/kg), petroleum hydrocarbons (33.6 micro g/kg), and detectable concentrations of other contaminants, such as hexavalent chromium, sulfate, sodium, aluminum, PCBs, and phthalate acid esters. Groundwater studied identified on-site contamination of alluvial and bedrock aquifers by organic and inorganic chemicals. Organic contaminants include cyanides (80 micro g/L), trichloroethylene (TCE)(53,000 micro g/L), trans-1,2-dichloroethylene (2,500 micro g/L), n-nitrosodimethylamine (NDMA)(17 micro g/L), and other organic compounds. Inorganic contaminants include hydrazine (14 micro g/L) and hexavalant chromium (52 micro g/L). Under present control, the potential public health hazard is limited to specific workers within the estimated 9,000 MMAG employees and possibly those individuals consuming fish and game from the area.

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