Superfund Record of Decision (EPA Region 8): Rocky Mountain Arsenal (Operable Unit 23), Adams County, Colorado (seventh remedial action), Final draft. March 1990

Technical Report · Thu Mar 01 04:00:00 EST 1990

OSTI ID:6400188

The 17,000-acre Rocky Mountain Arsenal (RMA) (Operable Unit 23) site is a former U.S. Army chemical warfare and incendiary munitions manufacturing and assembly plant in Adams County, Colorado. Operable Unit 23 (OU23), the Shell Section 36 Trenches, is one of several areas being addressed as part of the Other Contaminated Sources Interim Remedial Action. Approximately 31 trenches occupy an 8-acre area of Section 36 in the central portion of the RMA. From 1952 to 1965, liquid and solid waste including bulk or drummed process intermediates, off-specification product, laboratory sample filters, and other debris from the manufacture of pesticides was disposed of and buried in the trenches. Investigations by the Army from 1987 through 1989 have identified ground water contamination in a surficial unconsolidated sand aquifer underlying the site. A plume of dense non-aqueous phase liquids (DNAPLs) was also detected, and is believed to have originated from the Shell Section 36 trenches. The primary contaminants of concern affecting the soil and ground water are VOCs and other organics including pesticides.

• Research Organization: Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
• OSTI ID: 6400188
• Report Number(s): PB-91-921555/XAB; EPA/ROD/R--08-90/042
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AQUIFERS
COLORADO
CONTAMINATION
DEVELOPED COUNTRIES
FEDERAL REGION VIII
GROUND WATER
HAZARDOUS MATERIALS
HYDROGEN COMPOUNDS
LAWS
MANAGEMENT
MATERIALS
MATTER
NORTH AMERICA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PESTICIDES
PLUMES
POLLUTION
POLLUTION LAWS
REMEDIAL ACTION
SOILS
US SUPERFUND
USA
VOLATILE MATTER
WASTE DISPOSAL
WASTE MANAGEMENT
WATER