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Ann Arney <br /> Page 2 <br /> During sampling of the monitoring wells on November 25, .1991, it <br /> was noted by PHS/EHD'I,jstaff that the blue ice in the cooler used <br /> to cool'; the water samples was not frozen and the cooler was not <br /> cold. These samples Iwere also sent from California to the lab in <br /> Washington which is not documented on the ;Chain of Custody. <br /> PHS/EHDIis not confident that the water sample results are <br /> representative of the groundwater contents. Quarterly sampling <br /> of the groundwater should be conducted and reports submitted <br /> using the format outlined in Appendix A Tri-Regional Board Staff <br /> Recommendations. Also EDB should be included in the constituents <br /> tested for and a detection limit of . 02; parts per billion ', should <br /> be used: <br /> Future reports should contain a site map of the actual locations <br /> of the monitoring wells at this site, gradient determinations, <br /> survey data, and recommendation for future work. <br /> If you have any questions contact Margaret. Lagorio, Senior REHS, <br /> at (209) 468-3449. i <br /> Jogi Kh'� n M.D. M P.H. <br /> HeO icer <br /> a rie A.•, Cotulla, REHS, Program Manager <br /> vironmental Health ;;Division <br /> LAC/ML: lb <br /> C. CVRWQCB - Elizabeth Thayer <br /> C. Steffen, Robertson and Kirsten (U.S. ) Inc. <br /> 15311 NE 90th Street j <br /> Redmond, WA 980.52 <br /> J <br /> i <br /> a S <br />