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•San Joaquin County • DIRECTOR <br /> Donna Heran,REHS <br /> pP°'� N . c Environmental Health Department ASSISTANT DIRECTOR <br /> _. � .0G Laurie Cotulla,REHS <br /> .z 600 East Main Street <br /> a < Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> r .-- P Website: www.sjgov.org/ehd MargaretLagorio,REHS <br /> "q C%F p'FtRobert McClel Ion, REHS <br /> Phone: (209) 468-3420 Jeff Carruesco,REHS,RDI <br /> Fax: (209) 464-0138 Kasey Foley,REHS <br /> MABEL KEIR JUL 2 3 2007 <br /> 1103 GRANTLINE CT <br /> MODESTO CA 95330 <br /> RE: Lopez Properties SITE CODE: 0001525 <br /> 1601 Turnpike <br /> Stockton, CA 95206 <br /> On July 9, 2007, San Joaquin County Environmental Health Department (EHD) and Advanced <br /> GeoEnvironmental, Inc. (AGE) discussed by telephone the placement for the screened interval for <br /> -referenced site. hi Additional Site Assessment Work Plan— <br /> proposed deep well (MW9) at the above <br /> Monitoring Well Installation dated May 21, 2007, AGE had proposed placing the well's screen <br /> between 110 and 120 feet below surface grade (bsg). By letter dated July 5, 2007, EHD had <br /> recommended the well's screen be placed between 80 and 90 feet bsg based on soil lithology <br /> generated during the installation of monitoring well MW-13 on the adjacent property at 1607 <br /> Turnpike Road. AGE explained that heaving sand had been encountered during the installation for <br /> MW-13 and the lithology generated for this well could not be considered reliable information. <br /> Therefore, EHD approves AGE's proposed screened interval between 110 and 120 feet bsg for <br /> MW-9. <br /> Please provide clarification for the screen intervals (55 to 65 feet bsg or 60 to 65 feet bsg) for <br /> proposed wells MW-10 and MW-11, and indicate whether MW-11 will be installed approximately <br /> twenty-five feet south/southeast of existing well MW-6 as shown on Figure 2 of the work plan. <br /> Please respond to EHD's comments presented in this letter by August 23, 2007. If you have any <br /> questions, please contact Vicki McCartney at (209) 468-9852 or by electronic mail at <br /> vmccar-tney@sjcehd.com. <br /> Donna Heran, REHS,Director <br /> Environmental Health Department <br /> v�rl&k Nuel C. Henderson,Jr.,PG <br /> Victoria L. McCartney, Senior REHS <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> LOP/Site Mitigation Unit IV <br /> c: James L.L. Barton,PG-CVRWQCB <br /> Ally L. Colavita-AGE <br />