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i <br /> Working to Restore Nature <br /> 1710 Main Street <br /> Escalon,CA 95320 , -JAN <br /> Phone: (209)838-3507 <br /> FAX: (209) 838-3509 . ENVIRONMENTAL HEALTH <br /> PERM IfiJKRViC 65 January 4, 1993 <br /> Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Healy Property, 9172 Thornton Road, Stockton, California (Figure 1) <br /> Dear Ms. Lagorio: <br /> As we discussed via telephone on Thursday December 31, 1992 RESNA Industries, Inc. <br /> (RESNA) is writing to present an addendum to the letter workplan to address possible petroleum <br /> hydrocarbon contamination in the former underground storage tank area at the above referenced <br /> site. <br /> In response to your concerns: <br /> 1) Figure 1 depicts the former gasoline tank locations and pump island with the <br /> proposed boring location; <br /> 2) The boring will be drilled to 35 feet total depth using 6 inch hollow stem auger; <br /> 3) The boring will be abandoned with neat cement using the tremmie method; <br /> 4) The: oring will :be drilled by a licensed C-57 contractor; <br /> 5) The drill cuttings will be stored on site and covered with visqueen until laboratory <br /> analysis is complete and an appropriate disposal method can be developed; <br /> 6) The location of the boring will confirm the existence or previous removal of the <br /> product lines (Figure 1). The findings will be discussed in the summary report. <br /> Lr010493.FNL <br />