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�.I <br /> PUBLrC HEALTH SERVICES )_07 <br /> SAN JOAQL:f N COC:VTY r. <br /> JOG[ KHANNA M.D.,M.P H. <br /> He3ith Officer P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> (209) 46&3400 <br /> F <br /> r <br /> MR BUD GOOD J <br /> SOUTHLAND CORPORATION IUL 0 199 <br /> 5820 STONE RIDGE RD STE 310 <br /> PLEASONTON CA 94566 <br /> RE: 9110 Thornton Rd. SITE CODE: 1886 <br /> Public Health Services Environmental Health Division (PHS/EHD) <br /> has reviewed both the Proposal for Site Cleanup Confirmation <br /> dated May 5, 1992 and the Project Quarterly Update Report dated <br /> May 11, 1992. The following comments will address issues which <br /> have arisen as a result of the contents of these documents. <br /> 1. The low petroleum hydrocarbon concentrations which were <br /> detected in nine of the groundwater samples collected <br /> on February 24, 1992 and mentioned in the narrative <br /> sections of both documents were not supported with <br /> laboratory data sheets. All testing and copies of <br /> laboratory data sheets (including method blanks) and <br /> the corresponding "Chain of Custody" shall be included <br /> in reports to PHS/EHD and Central Valley Regional Water <br /> Quality Control Board (CVRWQCB) . Please provide this <br /> missing data under addendum within 30 days of the date <br /> that appears on this letter. <br /> 2 . During the collection of water samples, each well <br /> should be purged until temperature, conductivity and pH <br /> stabilize as outlined in Appendix C of the Leaking <br /> Underground Fuel Tank (LUFT) field manual. These <br /> parameters should be recorded by the sampler and <br /> available upon request from either PHS/EHD or CVRWQCB. <br /> 3 . The quarterly report indicates that a well-water bailer <br /> was lost in MW 9. Efforts to remove the lost bailer or <br /> replace this well need to be addressed prior to the <br /> next sampling event. <br /> 4 . The Chain of Custody Record 119370, with six domestic <br /> well samples, was not signed by the relinquishing <br /> sampler. Please provide a signed copy under the <br /> earlier mentioned addendum. <br /> A Division of San Joaquin County Health Care Services <br />