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GROUND ZERO ANALYSIS, INC. 1 711 <br /> 1714 Main Street n r T <br /> Escalon, California 95320-1927 �• j 5 <br /> Telephone (209)838-9888 <br /> Facsimde. (209)838-9883 <br /> September 13, 2001 <br /> Ms Lori Duncan <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject Confirmation Groundwater Sampling Report <br /> North Stockton Auto Service <br /> 8709 N Davis Road, Stockton, CA(Site Code 0786) <br /> Dear Ms Duncan <br /> This letter report presents the results of groundwater confirmation sampling activities at the subject site <br /> (Figure 1) The confirmation sampling was undertaken pursuant to your directive of August 2, 2001 <br /> SITE ACTIVITIES <br /> Activities at the site included surveying the 8709 N Davis Road site MW 1 casing elevation relative to <br /> the 8606 Thornton Road site (Circle K) well casing elevations, monitoring water level elevations and <br /> purging and sampling groundwater from well MW 1 Groundwater samples were analyzed for total <br /> petroleum hydrocarbons as gasoline (TPHg) by EPA Method 8015 modified and Volatile Organic <br /> Compounds, including oxygenated fuel additives, (VOC's)by EPA Method 8260 <br /> FIELDWORK <br /> Groundwater Monitoring and Sampling <br /> Fieldwork was conducted on August 22, 2001 in conjunction with monitoring by Gettler Ryan Inc at <br /> the adjacent Circle K site <br /> On August 22, 2001, a Ground Zero Analysis, Inc technician monitored and sampled well MW1, and <br /> surveyed the North Stockton Auto well MW 1 casing elevation relative to the same datum as the Circle <br /> K site wells Water levels were measured in North Stockton Auto well MW 1 and in Circle K well <br /> MW3 with Ground Zero's water level probe Water levels in all Circle K wells were then measured <br /> with Gettler-Ryan's probe Data were exchanged <br /> Nsautolreporu\consamplerpt doc <br />