Railroad Avenue GW Contamination OU1 Site, RI/FS, RD, and LTRA, Ogallala OU1 Site

Project Name

Location

West Des Moines, Iowa

Client

EPA Region 7

The Railroad Avenue site consists of chlorinated volatile organic compound (CVOC) groundwater contaminant plumes caused by historical releases of PCE and TCE that have occurred at the site. The data produced during the RI identified two separate source areas that are currently managed as two operable units (OUs): the northern plume (OU1) and the southern plume (OU2). The source area of the OU1 plume was approximately located along Railroad Avenue in West Des Moines, Iowa. Results of investigations by Black & Veatch at the OU1 site indicate that the source PCE and TCE has subsequently attenuated to cis-1, 2-DCE and vinyl chloride which are the more prevalent contaminants of concern at the OU1 northern plume site. Black & Veatch completed the Remedial Investigation/Feasibility Study (RI/FS) for the VOC groundwater contamination plume including budgeting, scheduling, and technical direction. Efforts performed included early identification of preliminary remedial alternatives resulting in saved effort and schedule for completing remedial action objectives for contaminants of concern (PCE, TCE, cis-1, 2-DCE, and VC).

The work included:

Directed the Remedial Design/ Remedial Action (RD/RA) for the OU1 VOC groundwater contamination plume including budgeting, scheduling, and technical direction.
Accomplished early identification of preliminary remedial alternatives which saved effort and schedule for completing remedial action objectives.
Evaluated site data for the OU1 plume to support MNA as a potential remedial alternative for the eastern portion of the northern plume.
Performed Long-Term Response Action (LTRA) for the OU1 VOC groundwater contamination plume including budgeting, scheduling, and technical direction where MNA was selected as the remedial technology for the contaminants of concern (PCE, TCE, cis-1, 2-DCE, and VC). Coordination with multiple site stakeholders included EPA, Iowa Department of Natural Resources (IDNR), City of West Des Moines, local residents, local businesses, impacted property owners, and the Iowa Department of Transportation were instrumental to meet EPA objectives and task order budgetary requirements.