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0 <br />San Joaquin County <br />Environmental Health Department <br />600 East Main Street <br />Stockton, California 95202-3029 <br />Website: www.sjgov.org/ehd <br />Phone: (209) 468-3420 <br />Fax: (209) 464-0138 <br />IJAN 0 2 206 <br />PETER & MINH BUI <br />4004 MADDIE CIRCLE <br />STOCKTON CA 95209 <br />RE: Ralph's Square <br />2122 S. Airport Way <br />Stockton CA 95206 <br />DIRECTOR <br />Donna Heran, REHS <br />ASSISTANT DIRECTOR <br />Laurie Cotulla, REHS <br />PROGRAM COORDINATORS <br />Carl Borgman, REHS <br />Mike Huggins, REHS, RDI <br />Margaret Lagorio, REHS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Kasey Foley, REHS <br />RALPH LEE WHITE <br />2230 S AIRPORT WAY <br />STOCKTON CA 95206 <br />SITE CODE: 1004 <br />San Joaquin County Environmental Health Department (SJC/EHD) has reviewed <br />Additional Site Assessment Work Plan — December 2007 (Work Plan) dated <br />December 21, 2007, submitted on your behalf by Advanced GeoEnviron mental, Inc. <br />(AGE) and has the following comments. <br />In the Work Plan AGE proposes to continue the investigation of the vertical extent of <br />the contamination at this site with the installation of one deep groundwater monitoring <br />well with a screen interval at approximately 100-110 feet below surface grade (bsg), <br />and the lateral extent of the contamination with four additional shallow groundwater <br />monitoring wells and one soil boring installed to total depth of 50 feet bsg. <br />SJC/EHD approves the installation of a deep screened monitoring well. The boring for <br />the monitoring well should be continuously cored at depth to ensure placement of the <br />screen over an appropriate water bearing interval. <br />SJC/EHD approves the installation of the proposed shallow soil boring and shallow <br />groundwater monitoring wells, but recommends proposed MW -8 and MW -9 be moved <br />further northwest and southwest respectively, to the edges of the paved area of the <br />property. <br />If you have any questions please call Lori Duncan at (209) 468-0337. <br />Donna Heran, REHS, Director <br />Environmental Health Department <br />Lori Duncan, Senior REHS <br />LOP/Site Mitigation Unit IV <br />cc: James Barton, PG, CVRWQCB <br />Rebecca Natal, AGE <br />Nuel C. Henderson, Jr., PG <br />LOP/Site Mitigation Unit IV <br />