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216 N. California Street February 23, 2010 <br /> page 2 <br /> At this time the reported analytical results from the grab groundwater samples must be <br /> verified by groundwater monitoring wells. The EHD approves the proposed installation of <br /> one well near the former tank pit area, but does not approve any further work at this time <br /> by CPT. Per the California Code of Regulations, Title 23, Section 2725, the vertical and <br /> lateral extent of the contamination must be defined, in both soil and groundwater. The <br /> EHD strongly urges the City to use the next mobilization for fieldwork to install at least <br /> three groundwater monitoring wells. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> Lori Duncan, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive #200, Rancho Cordova CA 95670 <br /> Alex Dewitt, Condor, 188 Frank West Circle, Suite 1, Stockton CA 95206 <br />