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Sent By: RWOCB SACRAMENTO; 916 255 3015; Jan-13-00 1U:2u; rage i ;l <br /> California Regional Water Quality Control Board <br /> 13 Central Valley Region <br /> Steven T.Butter,Chair (iray Davie <br /> Wirw"a IL El iKw ciuveriwr <br /> sorretaryfW Silawnento lbIWA Office <br /> Fxvlrtw.menwf luremetAddrew h1ApjjWWW.5wtcb.c1Lxuv/.-rwg0b5 <br /> Proiectiwr 3.143 Router Ruad.Sultry A,3ammolo,(AlUoraia 95827.3003 <br /> Phuue(916)275-3000•FAX(916)255-3015 <br /> 13 January 2000 - 7671 Dam �P 1 <br /> Post-it"Fax Note <br /> From <br /> TOS � <br /> Go, <br /> WOW. fw <br /> Ph" <br /> FHxtl <br /> Ms, Margaret Russell <br /> c/o Mr.John Welch <br /> PA.Box 690757 JAN 1 2000 <br /> Stockton,CA 95269 <br /> MENTAL HEA <br /> WORK PLAN APPROVAL,FORMER KARISUN TRUCKING, EN PERMITlSERVICESLTH <br /> MANTECA,SAN JOAQUIN COUNTY <br /> I have reviewed the 6 December 1999 work plan for the former Karlson Trucking site in Manteca, The <br /> work plan proposes to install five borings and two monitoring wells to define the lateral and vertical <br /> extent of petroleum hydrocarbon pollution at the site. My comments on the work plan are presented <br /> below. <br /> 1. The detection limit of 5.0 mg/kg for total extractable petroleum hydrocarbons in soil is too high.The <br /> practical quantitation limit of the Board's contract laboratory is 0.3 mglkg. Your laboratory should <br /> be able to detect to that level. <br /> 2. Destmcdon of monitoring well(MW) 5 should comply with all local and state roquireTnents, <br /> 3. The two new MWr, and the existing MWS should have the same reference point. It may be a gooa <br /> idea to resurvey the existing wells to ascertain the uccuracy of their elevations. <br /> 4. The table of detection limits for groundwater should include total petroleum hydrocarbons as <br /> gasoline,benzene, toluene,ethylbenzene, and xylenol. <br /> The work plan is hereby approved providd that the items above air,mill meorto t(9 6}implementation 3081 or <br /> or are incorporated into the work plan. If you have .til uestions, y y <br /> e-mail at isorenp4rb5s.swrch.ca.gov. <br /> HII.LP S.ISOR .T <br /> Associate Engineer <br /> cc: Mr. Stephen M. Lankford, Geo-Phase Environmental Inc.,Modesto <br /> California Environmental Protection Agency <br /> Reayekd Pyper <br />