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INC.06 6ETTLER - RYAN <br /> September 24, 2003 <br /> G-R Job #280054 <br /> Page 1 of 2 <br /> Mr Bob Hopkins <br /> Union Oil Company of California <br /> 276 Tank Farm Road <br /> San Luis Obispo, California 93406 <br /> RE Third Quarter Event of August 26 and 27, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Former Unocal Service Station #2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br /> Dear Mr Hopkins <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 /> • <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 Potentiometric 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 /> Si erely, <br /> 1 <br /> J <br /> Deanna L Harding <br /> Project Coordinator QROFESS/p� <br /> OV KFyo�� <br /> cm � 2m <br /> Hagop Kevork L+ No C 55734 rn <br /> P E No C55734 * Exp <br /> ��9TF <br /> CIV t. <br /> OF <br /> F `s`P <br /> F C Al-� O <br /> 6747 Sierra Court, Suite J Dublin, CA 94568 - (925) 551-7555 - Fax (925) 551-7888 <br /> 3140 Gold Camp Drive, Suite 170 - Rancho Cordova, CA 95670 • (916) 631-1300 • Fax (916) 631-1317 <br /> 1364 N McDowell Blvd , Suite B2 - Petaluma, CA 94954 • (707) 789-3255 - Fax (707) 789-3218 <br />