UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION,+ i'ITLANTA FEDERAL CENTER f31 FORSYTH STREEf AfL.ANTA, GEORGIA 30303·8960 

# JUN 1 72013 Mr. Andy Binford Division ofRemediation Tennessee Department ofEnvironment

and Conservation -J.OI Church Street, 4111 Floor L&C Annex Nashville, Tennessee 37243

Dear Mr. Binford:

The purpose ofthis letter is to solicit the support ofthe State ofTennessee on the listing ofthe Walker Machine Products Site (Site), located in Collierville, Shelby County, on the National Priorities List (NPL). The U.S. Environmental Protection Agency and the Tennessee Department ofEnvironment and Conservation (TDEC) have evaluated the Site tor releases ofhazardous substances, pollutants or contaminants under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The results ofthe site evaluation contirmedthat there has been a release ofhazardous substances to soil and groundwater at the Site, and TDEC and the EPA believe the Site poses a significant threat to pub!ic health or the environment.

Walker Machine produced automated machine screw products.The companywas in operation from 1953 until approximately 2002. Walker Machine Products used chlorinated solvents, includingtetrachloroethene (PCE) and 1,1,1-trichloroethane (TCJ\), to clean the finished products. i\ 1987Tennessee Occupational Safetyand Health Administration (OSHA) Inspection Report stated the companywas draining spentsolventonto the ground and into the sewerdrain in the

rear ofthe building. An oiljwater separatorwas used byWalker Machine Productswhich received solventwaste as well. The primary source ofsoil and ground water contamination is tound in the area ofthe oil/water separator.
Soil and groundwater belowthe site has been contaminated with PCE, TCA and theirdegradation products. The groundwatercontaminantplume has migrated off-site under the adjacent industrial property-Witt International.The City ofCollierville provides drinkingwaterto residents from 5 drinkingwater plants thatpump water from 12 differentwells. Well field #1, consistingof3 wells, is approximately 

### Vz mile from the Site, and only Y4 mile from the documented edge ofthe groundwatercontaminant plume. This well field services 12,284 residents. Long-term action is needed to remediate risks at the Site, and the EPA is only able to obtain funds tor long-term remedial actions. or for oversight ofprivate parties pertorming these long term remedial actions, ifthose sites are
on the NPL.
rhe EPA is completing the Hazard Ranking System documentation record tor the Walker Machine Products Site, establishing that this Site qualifies tor the NPL. TDEC and the EPA have maintained close communicationthroughout the Superfund evaluation process. To further coordinate with the State

on the NPL listing decision process, we are soliciting the State·s written support tor the EPA to proceed \Vith the NPL listing process for this Site. This letter, therefore, solicits from the Governor ofthe State of

Internet Address (URL) • http://www.epa.gov 1:.\::-c,.',elLRecyclable • PnntecJ w1th**V~?getable** Ud Based Inks on Recycled P:1per**~~,JlifliiPum** 30 '/;, Po=>tcon':;LmV:''r)**l'enn~:ssee,** or a delegated representative, the State's position on proposing the Walker Machine Products Site to the 

### NPL Pkase respond to:

!'vk A. Stanley Meiburg Acting Regional Administrator U.S. EPA Region 4 61 Forsyth Street, SW Atlanta, Georgia 30303-3104

We appreciate a prompt response so that the EPA may move forward expeditiously in the listing process. In order to stay on schedule to propose the Site in the next NPL update (anticipated to occur in October, :2013), we must receive State concurrence by July 3 L 2013. We look forward to working with your staffto promote our common goal ofprotecting human health and the environment. Should you desire any additional intormation, please do not hesitate to contact me at (404) 562-8599, or have your staffcontact Jennifer Wendel, Region 4 NPL Coordinator, at (404) 562-8799.

Superfund Division

cc: Mr. Terry Jeng, EPA-OSRTI Mr. Robert Myers, EPA-OSRTI