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GEQCHEfvAC/1L+(;EUICCI iNICAL•GNVIRQNhnENiAI <br /> August 4, 1990 F <br /> Mr. Steve Schneider �O <br /> San Joaquin County Public Health Services ,Fpj <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, Calf fornia 95201. <br /> Re: Addendum to soil remediation plan, Waterloo School, <br /> 7007 North Pezzi Road, Stockton, CA <br /> Dear Steve: <br /> As per your request, I am writing to addend Our May 18, 1990 soil <br /> remediation plan at Waterloo School. Prior to selecting a soil <br /> remediation alternative, the Schoo;. District has agreed to drill <br /> soil borings around the <br /> vr?rtipal extent of soil cformer tank Pit to define the lateral and <br /> _ ontamination. <br /> To define the extent of soil contamination 3-30 :Coot boring$ will <br /> be drilled around the pit to define the lateral extent of <br /> contamination (see attached figure), A boring <br /> drilled in the cwill also be <br /> c rater of the former pit and advanced to either <br /> the saturated zone (approximately 70 feet) or when two samples in <br /> row are determined to be clean. Ti, detQrminatSon will be <br /> made by field observations and by testing the soil with a <br /> photoionization detector and later confIrined by laboratory <br /> analysis. Soil samples will be collected every five feet and <br /> selected samples will be analyzed for benzene <br /> ethylbenzene, xylenes (STE%) and total petroleum hydrocarbonsnas <br /> gasoline (TpyiG). The samples will be analyzed by B.G. <br /> Laboratories in Bakersfield, California. <br /> The drilling spoils will be stored on plastic and covered with <br /> the same until, the laboratory results are received. The borings <br /> will be abandoned with neat cement. <br /> A letter report will be prepared that includes boring log,, <br /> laboratory results, and Conclusions and recommendations. <br /> 1710 MAIN Sh7EET • ESCAION,CA 95324 {?40)tl38.35QJ <br /> FRESNO.CA(209)222.3495 • RENO.NV(702) 788.0830 <br /> V/t'd <br />