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WALLACE • KUHL' <br /> &ASSOCIATES INC. <br /> January 3, 1995 <br /> Mr. Michael Infurna <br /> 1 <br /> San Joaquin County <br /> Public-Health Services <br /> P.O. Box 388 <br /> Stockton, California 95201-0388 <br /> WORKPLAN ADDENDUM . RECEIVED <br /> 781 SWIFT' WAY <br /> Stockton, California 95206 iA'N 0 4 1995 <br /> WKA No. 1735.03 'INVIOQNMOTAL HEALTH <br /> PERMIT/SERVICES <br /> Introduction <br /> We are submitting this workplan addendum for the continued ground water <br /> investigation at the above referenced site (Plate 1). The purpose of our work <br /> will be to further evaluate ground water quality westerly of the former tank <br /> excavation. <br /> j <br /> Geotechnical Engineering <br /> Quarterly ground water'measurements obtained December 16, 1992 through <br /> Engineering Geology <br /> September 6, 1994 from the three existing ground water monitoring wells, <br /> Environmental Consulting indicate ground water flow directions which vary almost 360° (Table 1). <br /> Because no ground water quality data is available northerly, southerly, or <br /> Remediation Services <br /> westerly of the former tanks, San Joaquin County Public Health Services in <br /> y Construction Inspection their letter of October 19, 1994 required that additional ground water <br /> monitoring'wells be installed in these directions. <br /> Materials Testing <br /> Based on the San Joaquin County requirements, we propose the installation of <br /> two additional monitoring wells beyond the single, southwesterly well <br /> 3050 Industrial Blvd. proposed in our August 19, 1994 Workplan. Plate 2 shows the location of <br /> existing ground water monitoring wells (MW 1 through MW3) and the location <br /> `» West Sacramento ' <br /> �€ of three proposed monitoring wells (MW4 through MW6). <br /> 1, <br /> CA 95691 <br /> Fax 916.372.2565 <br /> 916.372.1434 <br /> L <br /> Aec7cled ranrr . <br />