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SENT 2X:ARCO . 907-9.1 1:lOPM ENVIRONMENTAL ENG- <br /> 916 852 6688;* 2 <br /> PUBLIC, HEALTH SERACES . 1AIN �2 <br /> SAN JOAQUIN COUNTY <br /> JOGIKHANNA M.D..M.P.H. <br /> Health Officer <br /> p.O.Box 2009 a(1601 East Hazelton Avcndc)a Swcluas� ca0 n 1 �� <br /> 952ot tc <br /> (209)4683400 <br /> AUG 3 4 1991 <br /> RECO S E P Q 1991 <br /> KYLE C1-IRISTIH <br /> ARCO PRODUCTS CO <br /> P0BOX sail <br /> SAN A•tATEO CA 94402 <br /> RE: Arca Station #6100 IN REPLY REFER TO SITE CODE: 1708 <br /> 25775 Patteson Pass <br /> Tracy, CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division has reviewed the Work Plate <br /> dated August 5, 1991, prepared by Applied Geosysterns,Inc., and we have the following cammenn. <br /> 1. Per the telephone conversation of August 23, 1991 with David Swank of Applied <br /> i <br /> GeoSystems, eight vapor extraction wells will be installed. Screened interval of each vapor <br /> emacrion well will vary according to location of the well (subsurface chamccaristic). <br /> 2. Soil samples should be collected at five foot intervals or changes in lithology. <br /> 3. Sot1 samples should be tested for Total Lead using Medved 7421 not Organic Lead. <br /> 4. Submit as an addendum to the work Platt placement and storage of the sail tom the <br /> borings during the time disposal options are being evaluated. <br /> 5. Submit as an addendum to he work plan how soil samples will be selected for lab analysis. <br /> 6. Soil samples are to be maintained at 4oC until delivered to the laboratory. <br /> 7. Please provide this office with 48 hours notice prior w any site activity. <br /> If you have any quesdom, contact Margaret Lagorio, Senior REHS, of my staff at (209)468-3449. <br /> Logi Khanna,M.D., bLP.H. <br /> ealth Officer <br /> Laurie A. Cotulla, RENS gram Manager <br /> Environn ental Health Division <br /> LAQ I&:nr <br /> c: Applied Geo9yster s,Inc. <br /> A Diviaon of�)onquie Gomry Hcal[h Gua Semen \� <br /> i�? <br />