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GETTLER - RYAN INC. <br /> June 27, 2003 <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: Second Quarter Event of May 27,28, 29, and 30, 2003 <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 Former Vintage Car Wash,located <br /> at 601 East Miner Avenue, Stockton,California. <br /> . Static groundwater levels were measured and all wells were checked for the presence of separate-phase <br /> hydrocarbons. Separate-phase hydrocarbons were not present in the wells. Static water level data and groundwater <br /> elevations are summarized in Table 1. Joint Groundwater Monitoring Data and Analytical Results are presented in <br /> Table 6. Potentiometric 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 <br /> below. Concentration Maps are included as Figures 4, 5 and 6. The chain of custody document and laboratory <br /> analytical report are also attached. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br /> Sincerely, <br /> Deanna L. Harding V <br /> Project Coordinator <br /> GE0/ <br /> o a, <br /> o � <br /> * No.T 85Exp <br /> 7F <br /> dIL <br /> 1 <br /> Robert C. Mallory } <br /> Registered Geologist No. 7285 9�OFCAl1F� <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />