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FROM : CVRWQCB TEL: 916 255 3015 } OCT. 9. 1998 12:13 PM F 2 <br /> �: r� torni eglOnal 'Water Qu 6�. ontrol Board <br /> celtnd vale ZgSLO.s <br /> po"sil> Rooaes sada Minh alk. <br /> �lemar Aar, : F4WwwW WndW&S t-nWi .� 1��.BcLmbat <br /> MikmmmAd JU43 ReudwX0 d.Salle A.8wmmmw tifoW:' 95827-38x3 chak <br /> I� <br /> 0 ' MNM(916)x35-SM•FAX{916)253.3015 <br /> 9 October 1998 <br /> f <br /> Mr.Ronald Alunan <br /> r 651 Owway Boulevard#790 <br /> South San Francisco,CA 94808 <br /> 1 reviewed the 13 July 1998 report Excavadort for One Soil Boring. (report)submitted on your behalf by <br /> GlaoSoly,LLC. The report presents a summary of the soilboring and sampling activities completed at <br /> your site between 26 June and 1 July 1998. `The analytical iicsulti'of the single groundwater sample <br /> revealed elevated concentrations of TPHg,benzene and toluene. <br /> Based on the analytical results of the groundwater sample collected from boring B7,the extent of <br /> groundwater impact must be determined below your site. Pleasic Aub mita workplan to San Joaquin <br /> County Environmental Health Division and the Regional Board,to address drilling three soil borings to <br /> groundwater,sampling soil from the capillary fringe and ssturated'izone.,and collecting one groundwater <br /> sample from each soil boring, All soil and Smudwater samples must be analyzed for TPffg,BTEX and <br /> the fuel oxygenated lining FPA Methods 80151802.0 and 8260. 'lite groundwater samples must be <br /> collected using a technology that provides samples represenfative,of chemical and hydrogeologic <br /> conditions(please see enclosed memo). The alternative to using appropriate sampling technology is to <br /> install three monitoring wells and to begin a groundwater monitoring program. <br /> The report also provides a calculation for groundwater flow dlreciion and hydraulic gradient. The source <br /> of the groundwater elevation data Is not appropriate for these cslcuas <br /> lations(please see edclosed memo). <br /> Because no monitoring wells are located at the site or in the,vicinity of the site, a more reliable hydraulic <br /> gradient arta flow direction for the area may be obtained freta regional groundwater maps or through the <br /> San Joaquin County Environmental Health Division, <br /> If you have any questions,please contact me at(916)'255-3132. <br /> OR- <br /> AFT <br /> MARK R.LIST <br /> Engineering Geologist <br /> ce: Ms. Pamela Rarick,Stale Water Resources Control Board,UST Cleanup Fund,Sacramento <br /> Mr.Jeff Wong,San Joaquin County Environmental Health Division,Stockton <br /> Mr.Frank Goldman,GeoSoly,LLC.,Sonoma <br /> CaWornfa Env[ronmental PratacHon agency <br /> xreyrleaPgper <br />