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pi <br /> AAW <br /> 2 October 1989 T <br /> WI7d3N1nd1N��N0�1 nN3 <br /> Ms. Eleanor Ratliff <br /> Registered Environmental Health Specialist <br /> Environmental Health Division <br /> Q <br /> San Joaquin County <br /> Department of Public Health Services <br /> P.O. Box 2009 <br /> Stockton CA 95201 <br /> GRUP£ DEVELOPMENT COMPANY, BROOKSIDE DEVELOPMENT SITE, AREA 3, Skald Jq) 0 ?91N <br /> COUNTY, PROPOSED GROUND WATFR MONITORING WELLS <br /> We have reviewed the work plan prepared by Levine-Fricke, dated 25 August <br /> 1989, for the installation of monitoring wells at this site. The proposal <br /> includes installation and sampling of five ground water monitoring wells to <br /> investigate the quality of ground water in the vicinity of a former above- <br /> ground diesel tank and a former drum storage area. <br /> the proposed monitoring well locations and depths appear adequate for this <br /> phase of the investigation. However, we recommend that prior to report <br /> preparation, a second round of sampling be conducted to verify the initial <br /> results. Because the specific types of materials stored in the drum storage <br /> area are not known, we request that the proposed analytical procedures be <br /> modified to include total dissolved solids, general minerals and nitrates. If <br /> contaminants are detected in the initial rounds of samples obtained from the <br /> monitoring wells, additional investigation may be warranted. <br /> Based on telephone conversations between Regional Board staff Grupe <br /> Development Company's consultant, we understand there are other areas of this <br /> property where discharges to ground water may have occurred. We request that <br /> all available information on contaminants in other areas of the property be <br /> submitted to this office. Areas of concern include underground storage tank <br /> locations and the "garbage pit" identified on the site plan. Please note that <br /> this garbage pit may be subject to other monitoring and closure requirements. <br /> Any information regarding depth of this pit and types of wastes disposed of <br /> should be submitted to this office for review by the appropriate regulatory <br /> Section. <br /> If' you should have any questions, please call me at (916) 361-5731 . <br /> THOMAS D, NLLIIER <br /> Engineering Geologist <br /> TDP/tdp <br /> it <br />