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091 6ETTLER - RYAN <br /> INC.IN <br /> September 20, 2002 <br /> G-R Job#280045 <br /> Page 1 of 2 <br /> Mr Nick Nickerson <br /> Union Oil Company of California <br /> 8788 Elk Grove Boulevard <br /> Building 3, Suite 15 <br /> Elk Grove,California 95624 <br /> RE- Third Quarter Event of August 12, 13 and 14, 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 conducted with Vintage Car Wash,located at 601 <br /> East Miner Avenue, Stockton, California <br /> iStatic 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 l Potentiometnc Maps are included as Figures 1, 2 and 3 <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory for <br /> analyses The field data sheets for this event are attached Analytical results are presented in the table(s)listed below <br /> Concentration Maps are included as Figures 4, 5 and 6 The chain of custody document and laboratory analytical <br /> report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> Sincerely, <br /> RED Gcg <br /> Deanna L Harding �Ca`OJGS J <br /> Project Coordinator <br /> No 6882 <br /> Doug s J e <br /> Senior eo gist, R G No 6882 �,9T�OF CA0Fprc�� <br /> i <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />