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GETTLER - RYAN INC. <br /> March 29, 2002 <br /> G-R Job#280045 <br /> Mr Nick Nickerson Page l of 2 <br /> Union Oil Company of California <br /> 8788 Elk Grove Boulevard <br /> Building 3, Suite 15 <br /> Elk Grove, California 95624 <br /> RE. First Quarter Event of February 25,26 and 27,2002 <br /> Groundwater Monitoring& Sampling Report <br /> Former Unocal Service Station #0187 <br /> 437 East Miner Avenue <br /> Stockton, California <br /> Dear Mr Nickerson <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan Inc <br /> (G-R)at the referenced site All field work was conducted in accordance with G-R Standard Operating Procedure- <br /> Groundwater Sampling (attached) A Joint monitoring event was scheduled with Vintage Car Wash located at 601 <br /> i East Miner Avenue, Stockton, California Joint monitoring data is not included in the report <br /> 7 Static groundwater levels were measured and all wells were checked for the presence of separate-phase hydrocarbons <br /> Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater elevations are <br /> summarized in Table 1 Potentiometnc Maps are included as Figures 1, 2 and 3 <br /> Groundwater samples were collected from the monitoring wells as specified by G-R Standard Operating Procedure- <br /> Groundwater Sampling (attached) The field data sheets are also attached The samples were analyzed by Sequoia <br /> Analytical Analytical results are summarized in Tables 1 through 5 Concentration Maps are included as Figures 4,5 <br /> and 6 Chain of custody documents and laboratory analytical reports are also attached <br /> Sincerely, <br /> t <br /> �R�G GE <br /> Deanna L Harding S ,LAS C(O <br /> Project Coordinator <br /> No 6882 <br /> 4DougJ <br /> Senior Geologist, R G No 6882 IFOF CAI.��O� <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />