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i <br /> Curtiss Pontiac-Cadillac Page 2 <br /> 2450 Toste Road July 10, 2008 <br /> Tracy, CA j <br /> f <br /> The addendum is due for submittal to the EHD no later than August 1, 2008. <br /> In the Report AGE states that they consider the dissolved contamination at this site to be <br /> undefined, and recommend installation of additional groundwater monitoring wells. The <br /> EHD does not agree with this determination or recommendation. The vertical extent of <br /> the groundwater contamination has been defined by monitoring wells MW-1A, which has a <br /> screen interval from 23-28 bsg,1and MW-7, with a screen interval from 36-41 feet bsg. <br /> The lateral extent of the shallow,groundwater contamination is defined by wells MW-2A, <br /> MW-3, MW-5, MW-6 and GLMW-3. In the early phases of the site investigation direct <br /> push soil boring were advanced onsite to collect soil and grab groundwater samples for <br /> analysis. Results of the groundwater analysis indicate the dissolved contamination <br /> extended beyond the area of the MW-1A, MW-1B and MW-7 cluster, but not as far as the <br /> lateral well locations. The EHD considers the sum of the site investigation results already <br /> available to be sufficient for planning the groundwater remediation. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> Lori Duncan, REHS Margar�ioR <br /> Senior Registered Environmental Health Specialist Program Coordinator <br /> c: James Barton, CVRWQCB, 11620 Sun Center Drive #200, Rancho Cordova, CA 95670 <br /> Lauren Cardinelli, AGE, 837 Shaw Avenue, Stockton CA 95215 <br /> , <br />