RAILROAD AVENUE GROUND WATER CONTAMINATION SITE IOWA EPA ID# IA00G1610963 EPA Region 7 City: West Des Moines County: Polk Other Names: 06/10/2008 SITE DESCRIPTION The Railroad Avenue site consists of an area of ground water contamination which includes 22 municipal water supply wells that historically or currently supply water to the residents of West Des Moines, Iowa, and the potential source areas of the contamination . West Des Moines, a suburb of Des Moines, Iowa, is located in southwest Polk County in south-central Iowa. The site occupies portions of Sections 10, 11, 14, 15, 16, 21, and 22, T78N, R25W. Site Responsibility: This site is being addressed through Federal, State and PRP actions NPL LISTING HISTORY Proposed Date: 09/13/2001 Final Date: 09/05/2002 Deleted Date: THREATS AND CONTAMINANTS The ground water has been contaminated with trichloroethylene (TCE), cis-l,2-dichloroethylene (cis-l,2-DCE), and vinyl chloride. Contamination in the ------- ground water has been detected in several of the municipal water supply wells, and 5 of these were historically taken off-line, but have since been returned to service subsequent to interim response action. CLEANUP APPROACH Response Action Status Cleanup Ongoing: A Site Investigation and Expanded Site Investigation were completed for the site. As a result, the site was divided into two operable units. OU1 covers the northern of the two separate plumes of ground water contamination at the site. This OU is being remediated as a fund-lead project, because no PRP's were identified for the contamination. A Record of Decision was completed for the western portion of the plume on September 26, 2003, and a Record of Decision was completed for the eastern portion of the plume on September 19, 2005. OU2 was established for the southern plume, which has a PRP. A consent order was signed with this PRP to conduct further investigations and removal actions for the southern plume. The remedial investigation for OU 1 was completed in March 2004. The removal action at OU2 constructed new aerators at the water plant to provide treatment for the contaminants in the plume before use of the water for drinking water supply. The same action provides treatment for the contaminants in the western portion of the northern plume. The initial RA on OU1, incorporating air stripping via the aerators at the water plant, was completed on September 12, 2007. Ground water in both plumes is extracted using existing municipal water supply wells. An Action Memorandum for the removal was signed on September 26, 2003, and the removal has been completed. A second removal action for the southern plume, prompting installation and operation of sparging wells in the most contaminated portion of the plume, was approved on April 19, 2005, by an Action Memorandum. A Record of Decision was completed on September 11, 2006, for OU2 and calls for continued operation of the sparge wells and monitored natural attenuation. The ground water associated with OU2 continues to be monitored and shows a trend of decreasing contamination. The site achieved NPL Construction Complete, and ground water migration was considered under control as of the end of FY 2007. For OU1, the second RA for monitored natural attenuation, started on November 15, 2006. This second OU1 RA is scheduled to be completed by September 2008. The PRP started their RD on OU2 on July 12, 2007. It is scheduled for completion on June 30, 2008. The Consent Decree on OU2 was entered on October 15, 2007. ------- Site Facts: ENVIRONMENTAL PROGRESS Remedial Investigations have been completed for both plumes. Construction of new aerators has been completed and they are currently operating successfully for the southern plume and the western portion of the northern plume. A sparging well system was installed to remediate the southern plume in addition to monitored attenuation. The eastern portion of the northern plume is being remediated by monitored natural attenuation. COMMUNITY INVOLVEMENT 11/99 - Fact Sheet updating information on investigation of soil and ground water contamination. 6/00 - Fact Sheet explaining continuation of evaluation of information received during sampling. 10/00 - Fact Sheet announcing Public Availability session. Meeting held 10/24/00. Display Ad in the Des Moines Register. 10/01 - Fact Sheet announces Proposal to List site on the NPL and comment period. Display ad in the Des Moines Register. Press Release sent to media outlets. 7/02 - Community notified of Technical Assistance Grant through direct mailing, display ad published in Des Moines Register 9/02 - Press Release announcing Final Listing of the site to the NPL sent to media outlets. 2/03 - Conducted community interviews to use in creating the Community Involvement Plan, final dated 5/29/03. 8/03 - Fact Sheet announcing Proposed Plan for Interim Remedial Action and public meeting to take public comments. Display Ad in the Des Moines Register. 9/03 - Fact Sheet sent out re: Useful Property Information. 10/03 - Fact Sheet announcing ROD for Interim Remedial Action. 6/05 - Fact Sheet announcing Proposed Plan and Public Meeting to take public comment. Display Ad in the Des Moines Register. 9/05 - Fact Sheet announcing ROD for Northern Plume. Display Ad announcing ROD. 7/06 - Fact Sheet announcing Proposed Plan and Public Meeting to take public comment for ------- ROD for Southern Plume. Display Ad in the Des Moines Register. 10/06- Fact Sheet announcing ROD for Southern Plume. Display Ad announcing ROD. ------- SITE REPOSITORY West Des Moines Public Library 4000 George M. Mills Civic Parkway West Des Moines, Iowa Superfund Records Center 901 N. 5th St. Kansas City, KS 66101 Mail Stop SUPR (913)551-7166 REGIONAL CONTACTS SITE MANAGER: E-MAIL ADDRESS: PHONE NUMBER: COMMUNITY INVOLVEMENT COORDINATOR: PHONE NUMBER: E-MAIL ADDRESS: STATE CONTACT: PHONE NUMBER: Bill Gresham gresham.bill@epa.gov (913)551-7804 Beckie Himes (913)551-7253 himes.beckie@epa.gov Bob Drustrup, IDNR (515)281-8900 MISCELLANEOUS INFORMATION STATE: IA CONGRESSIONAL DISTRICT: 3 EPA ORGANIZATION: SFD-IANE MODIFICATIONS Created by: Bill Created Date: 06/13/2002 03:57 PM Gresham/SUPR/R7/USEPA/ US Last Modified by: Beckie Last Modified Date: 06/10/2008 03:03 PM Himes/R7/USEPA/US ------- |