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t <br /> STATE OF CAOFORNIA---HEALTH AND WELFARE AGfNCY GfO*GE NVIWAAN, Go"~ <br /> DEPARTMENT OF HEALTH SERVICES — — --- - - <br /> TOXIC SUBSTANCES CONTROL DIVISION <br /> NORTHERN CALIFORNIA SCCTiON <br /> 4230 POWER INN AOS 0 <br /> SACRAMENTo,CA 901126 <br /> (916)739-3145 <br /> 21 July 1988 <br /> Christopher Vais A TY <br /> o I <br /> Woodward-Clyde Consultants _ ` <br /> 500 12th Street, Suite 100 1 ice': <br /> Oakland, CA 94607-4014 F4i"J <br /> Dear Chris: ENVIROmE"iTAL HEALTH <br /> FERI,III-/SERVICES <br /> CONFERENCE CALL AGREEMENTS, LIKA CORPORATION (NAVY DRIVE) , <br /> SAN JOAQUIN COUNTY <br /> On 7 July, we met via telephone with you and LIKA Corporation's <br /> counsel . This letter confirms the results of that discussion. <br /> The focus of the meeting centered on additional work requested by <br /> us as part of the site investigation. Woodward-Clyde agreed to <br /> install a deeper well screened in a permeable horizon and paired <br /> with monitoring well 14 . You also requested installation of a <br /> deeper well paired with monitoring well 16 (upgxadient) . To this <br /> the Department agreed. <br /> The need for continued monitoring of groundwater elevations was <br /> raised. We agreed that all shallow wells at the site would be <br /> monitored on a monthly basis. <br /> The issue of groundwater quality monitoring was discussed. It <br /> was agreed that quarterly sampling of nine wells would be <br /> conducted by Woodward-Clyde for TDS, lead, and conductivity. It <br /> was assumed by the Department that field measurements of <br /> temperature and pH would be conducted for all groundwater quality <br /> sampling. The exact location of wells to be sampled for water <br /> quality was to be determined after review of investigations to <br /> date. Samples will be collected using a peristaltic pump and an <br /> in-line filter. Sampling for this effort would begin with the <br /> first round of elevation monitoring. <br /> Gradation analysis for the additional wells was mentioned as an <br /> area of concern. It was agreed that sieve samples would be <br /> collected and analyzed prior to well installation. <br /> i <br /> d >✓0 S I � i6I ��I "' <br /> I.Ii i�J J I <br />