Accession Number : ADA288966

Title :   Dibromo-Chloropropane Source Definition, Rocky Mountain Arsenal, Colorado. Phase 1,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Whitten, Charlie B. ; Shamburger, John H.

PDF Url : ADA288966

Report Date : SEP 1984

Pagination or Media Count : 22

Abstract : In March 1980, Dibromo-Chioropropane (DBCP) or Nemagon was discovered in water wells in the Irondale community, which is located adjacent to the north- west boundary of Rocky Mountain Arsenal (RMA). The RMA and Shell Chemical Company (SCC) initiated a coordinated program to identify the DBCP plume influencing the wells at Irondale. In addition, the SCC constructed a control system along the northwest boundary to stop the DBCP from migrating offpost. This control system consists of a hydrologic barrier, rows of extraction and injection wells, and a treatment system. An evaluation program was implemented by RMA and SCC to determine the effectiveness of the control system which would also define the route of migration of DBCP. Two unconnected areas of high Nemagon concentrations were identified in existing wells during the evaluation study. One area is north of 7th Avenue with well 33-30 having the maximum concentration and the other area is south of 7th Avenue with well 5-23 showing the maximum concentration (Figure 1).A possible reason for these two areas to appear separated is because the moni- toring wells along 7th Avenue penetrate only 5 ft into the alluvial aquifer. Both areas are adjacent to railroad tracks where spills could have occurred and are underlain by a buried channel (Figure 1) that is incised in the T)enver formation. Purpose and Scope: The purpose of this study was to determine if the two areas of high Nemagon concentrations are from one source south of the railyard or if there are two sources - one south in the railyard area and a second source north of 7th Avenue.

Descriptors :   *CHLORINE, *PROPANE, *BROMINE, SOURCES, INJECTION, CONTROL SYSTEMS, SHELLS(STRUCTURAL FORMS), ALLUVIUM, BOUNDARIES, AQUIFERS, ORGANIC COMPOUNDS, EXTRACTION, NORTH(DIRECTION), BURIED OBJECTS, WEST(DIRECTION), CHANNELS, CHEMICAL COMPOUNDS, COLORADO, WATER WELLS, RAILROAD TRACKS.

Subject Categories : Organic Chemistry
      Logistics, Military Facilities and Supplies
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE