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4zi 6ETTLER - RYAN INC. , <br /> June 20, 2003 <br /> G-R Job #280054 <br /> Pagel 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 19, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Former Unocal Service Station#2859 <br /> 1665 Pacific Avenue <br /> Stockton,California <br /> Dear Mr Nickerson <br /> This report documents the most recent quarterly groundwater monitoring and sampling event performed by Gettler- <br /> Ryan Inc (G-R) All field work was conducted in accordance with G-R Standard Operating Procedure-Groundwater <br /> Sampling(attached) <br /> 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 Dissolved Oxygen Concentrations are summarized in Table 6 Potentiometnc Maps are <br /> included as Figures 1 and 2 <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 /> A Concentration Map is included as Figure 3 The chain of custody document and laboratory analytical report are also <br /> attached <br /> Sincerely, <br /> �P/LGcx�C, <br /> FW_ - <br /> Deanna L Harding <br /> Project Coordinator <br /> ��RED GE�I <br /> Robert C Mallory �r °C No 7 85 �r <br /> Registered Geologist, No 7285 �, Exp °1 Q- <br /> ���F CA�1F�Q� <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 -7555 <br />