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MAY-19-95 FR1 1MB CONDOR EARTH TECH . FAX NO, 2095320773 F, 92 <br /> CEA <br /> T <br /> CONDOR EARTH TECHNOLOGIES INC. <br /> 21663 Brian Lane <br /> 1$, X95 PQ Box 3935 <br /> Sonora, CR 95370 <br /> (209)532-0361 <br /> FAX(209)532-0T73 <br /> Mr. Steve Sasson <br /> Saar.Joaquin County Public HWItb Services <br /> Environmental Health Division <br /> 445 N. San Joaquin Street <br /> St ekton, CA 95201-0588 <br /> Srrbjed: Addendum to Groundwater Ltvesiiati(n Work Plan for 1444 Whrep Road, <br /> l athr+op, California.. <br /> Dear Mr. Sasson,; <br /> Ina letter dwell lanuuy 3D, 1995, the Sawn Jowp county Public Health Services, <br /> E vkonmental Health Divisi,uan MCPHS,EHD)VpMved, wA comments, th.e September 27, 1994, <br /> work plan prepared by Gondar Ea IL Technolugift,Inc., (Condor), for a groundwater investigation at <br /> the above referenced sites. The low of the Di Salvo W I,a2hrop site is shown in P%= 1, attached. <br /> This ltd proposes to amend the approved work plan. <br /> BACKGROUND <br /> CmWoes work plan outlined a phased inves6g ' n to evaluate groundwatef conditions at the <br /> site. 7be first phase of the investigation ended tate col a:tion of one grab groundwatar Sample near <br /> the cast end of the former location of T1K4 usipg a Hydropunch sling tool. Tbc purpose of <br /> collecting the groundwater sample was to evaluate if h turban pmeamination detected in the soil <br /> subsurface hal leached into the shallow water table at tbib site. Recent caneapancl M whit <br /> SJCPHS,ERD "indicated that regardless of'the results of the laboratwT anWys% of the grab <br /> groundwater sample, the installation of one monitor well within 10 feet and in the down gradient <br /> directim of the detected contaJminadon source would be equired. S3CPH'S,EHD also stated that iA <br /> laboxawy analyses of the groundwater sale collected om the monitor well indicate no "ence of <br /> hydrocarbon coutamirtatien at or above the reported laboratory tinction limit8 for two consecutive <br /> quarters and the soil corntamination deterred at the sim durft over-excgvatlon can be shown to parse <br /> no rids to human health, SXCPHS,EHD would issue site c1mure at the Di Salvo-Latbrop location. <br /> ENVIRONMENTAL a GEOLOGICAL ENGINEERING 43EOTECHNICAL <br />