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6ETTLER - RYAN INC. <br /> September 15, 2003 <br /> G-R Job #180288 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway Avenue <br /> Sacramento,California 95818 <br /> RE• Third Quarter Event of August 14,2003 <br /> Groundwater Monitoring& Sampling Report <br /> Tosco(Former BP) Service Station #11192 <br /> 1403 Country Club Boulevard <br /> Stockton, California <br /> Dear Mr Ralston <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 groundwater monitoring event was conducted with the Former Shell <br /> Service Station, located at 1267 Country Club Boulevard, Stockton, California <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase <br /> r hydrocarbons Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater <br /> ' elevations are summarized in Table 1 Field Measurements are summarized in Table 3 and a Potentiometnc Map is <br /> included as Figure 1 <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 A Concentration Map is included as Figure 2 The chain of custody document and laboratory analytical <br /> report are also attached <br /> ti <br /> ncerely, n <br /> Deanna L Harding <br /> Project Coordinatory � <br /> �G � <br /> � � a <br /> * No7285 <br /> Robert C Mallory d!klExA <br /> Registered Geologist,No 7285 9 <br /> OF <br /> Figure 1 Potentiometnc Map <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Table 3 Field Measurements and Analytical Results <br /> Table 4 Joint Groundwater Monitoring Data and Analytical Results-Steell <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> 11 192-qM] 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 9 (707) 789-3255 9 Fax (707) 789-3218 <br />