Laserfiche WebLink
ENVIRONMENTAL HEALTH DEPARTMENT <br /> c SAN J <br /> _• OAQUIN COUNTY <br /> ..o <br /> .• �,,,� .i Unit Supervisors <br /> Z Donna K.Heran,R.E.H.S. Carl Bor man,R.E.H.S. <br /> N: Director 304 East Weber Avenue, Third Floor g <br /> I' Mike Huggins,R.E.H.S.,R.D.I. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> • c•. a Manager M <br /> Program <br /> q��Fo.Ri'• g g Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> A R AND M E GLOVER FEB 17 2004 <br /> FAYETTE MANUFACTURING CORPORATION <br /> P O BOX 61 <br /> TRACY CA 95378 <br /> RE: Fayette Manufacturing Corporation SITE CODE: 2233 <br /> 7675 Eleventh Street <br /> Tracy, California <br /> The San Joaquin County Environmental HealtFi Department (EHD) has received <br /> and reviewed First Quarter 2004 Groundwater Monitoring Report for the Fayette <br /> Manufacturing Site (QR), dated 27 January 2004, prepared by your consultant <br /> ATC Associates, Inc. (ATC). The QR includes a brief site description, site release <br /> and investigation history, and the methods and results for the January 2004 <br /> ground water monitoring event. <br /> Between 12 November 2003 and 08 January 2004, criteria for site closure <br /> consideration were discussed during several telephone conversations between the <br /> EHD and Ms. Jeanne Homsey of ATC. The EHD requested that a current round of <br /> ground water monitoring be conducted and that the laboratory analysis of the <br /> samples include 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) as <br /> analytes. During the 08 January 2004 conversation, the EHD informed Ms. <br /> Homsey that a potential problem for closure consideration may be the lack of <br /> vertical delineation of the plume of impacted ground water and the potential for <br /> impacted ground water to migrate in the down-gradient direction undetected <br /> between monitoring wells MW-4 and MW5, both of which are somewhat oblique to <br /> the general ground water flow direction from the former underground storage tank <br /> (UST) pit. <br /> The recent QR shows that the known extent of impacted ground water includes <br /> only monitoring wells MW-2 and MW-3, the obliquely down-gradient wells MW-4 <br /> and MW-5 are not impacted. Although the reporting limit for 1,2-DCA at 2 <br /> microgams per liter (µg/1) exceeds the maximum contaminant level (MCL) (0.5 <br /> µg/1), the results suggest that the compound is not likely to be a serious concern. <br /> Contaminants detected in water samples from MW-2 and MW-3 had <br /> concentrations that fell within the general range previously encountered in these <br /> well samples, a bit at the low end in MW-2 and a bit at the high end in MW-3. <br />