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John and Margaret MarcsJanuary 11, 2011 <br /> 2969 E. Loomis Road Page 3 of 3 <br /> site closure summary report (SCSR) to the EHD within 60 days of receiving the analytical <br /> results. In addition to providing the information specified m of the Central Valle Arpendix A Y <br /> Regional Water Quality Control Board's Tri-Regional Guidelines, please also address the issues <br /> of concern identified above, provide a human health risk ;evaluation- by comparing residual <br /> concentrations in soil and groundwater to the San Francisco Bay Regional Water Quality <br /> and evaluate <br /> the potential risk posed <br /> Control Board's Environmental Screening Levels (FSCs) a p p <br /> by vapor intrusion. Finally, provide an estimate of the time required for impacted groundwater to <br /> achieve water quality objectives (WQOs)through natural attenuation. <br /> If you have any questions, please contact Vicki McCartney at (209) 468-9852 or by e-mail at <br /> vmccartneyCa)sicehd.com. <br /> Sincerely, <br /> I <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> -.Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Ms. Tamorah Bryant, PE, Geological Technics Inc., 1172 Kansas Avenue, Modesto, <br /> California 95351-1526 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central Valley <br /> Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br /> Mr. Kirk Larson, PG, California State Water Resources Control Board, PO Box 94244-2120, <br /> Sacramento, CA 94244-2120 <br /> I <br /> i <br /> I <br /> i <br /> i <br /> Confirmation Sampling Directive Letter and Request for No Further Action Request Report 0111 <br /> t <br />