Document q99RXQVYe4e35dwwbD1BwByE

DuPotit Fluoroproducts AR226-2612 DuPoat Pluofoproducts ''' Chestnut RUB Plaza P.O. Box 80711 . .. y; j,-^.,.. Wumittgton.DE 3%80.07n" December 3,2003 Mr. Steven E. Williams Hydrogeologigt State of Ohio Environmental Protection Agency Southeast District Office 2195 Front Street Logan,0hio 43138 VIA FACSIMILE AND CERTIFIED MAIL Dear Mr. Williams: Re: Utter of October 23, 2003 Sampling Investigation Results, Little Hocking Water Association (LHWA), Washington County, Ohio April 2003 ' vt'- '' This latter is in response to Ohio EPA's Request for Additional Investigation, as set forai in the above-identified letter to DuPont. In the letter, Ohio EPA recommends that DuPont conduct the following activities in the vicinity of the LHWA well field; Establish at least 8 locations to collect surface soil analysis for C-8, with the locations : .. *;.. , to be selected based upon air and ground water modeling and soil and ground water data already collected. Install at least 4 groimdwater monitoring wells within me LHWA well fidd to monitor the shallow portion of the saturated zone. Sample quarterly m conjunction with production well sampling, DuPont agrees to Ae above recommendations and in addition, offers Ihe following enhancements with respect to the recommended surface soil analysis: ' " Two soil sampling events will be conducted, one directly after a >0.5 inch rain .."^^ event and the other after 5 days of no precipitation. For each event, the following samples will be collected: Foliage layer sample (grass and root zone) Surface soil sample (depth interval to be determined) '""^'n^s^' :(? ASH027119 EID780399 EID780399 We. SteveE.WHKn December 3, 2003 : Vfyz^^'^ssftr Please advise whetfier this proposed enhancement to Ohio EPA's recommenctetiQnfor additional sampling is acceptable. I ttust that the details eoneerning this sampling effort will be determined between you and Andrew Haitten from DuPont. DuPont appreciates Ohio EPA's scientifically based approach to this matter and looks forward to our continued cooperative efforts. Veiy truly yours, David M.Rurale Safety, HeaMi, and Environmental Manager Global Business Managet, APTO DuPont Fluoroproducis CRPBld.711/2210-C P.O. Box 80711 Wilmington, Delawire 19880-0711 302-999-2415 (phone) 302-999-3095 (flx) ' .';:.. E-mail: David.M.RTOk.usa.duooiitcott f.iiir+ia'i;) ". cc: Mz. Mike Baker, Ohio EPA.DDAGW, CO 1 .,-*i|;t.. , >^T%^1-",.%.. ' 5' t1.^'1^^ ."^^ ^i^^.,,.fi.-.;,:i.. .^ :'^t';;i?>i "^ . ASH027120 EID780400 EID780400