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r, <br /> A <br /> i'4Zi <br /> INC. ��ETTLERRYQN <br /> June 9, 2003 <br /> G-R Job#180288 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway Avenue <br /> Sacramento, California 95818 <br /> RE: Second Quarter Event of May 14, 2003 <br /> Groundwater Monitonng & 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 fieldwork 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 /> 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 /> 0 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 /> ASincr , * , <br /> Deanna L Harding <br /> Project Coordinator G 0, <br /> 0 <br /> 7k W No 7285 <br /> Robert C Mallory Exp 01 <br /> Registered Geologist,No 7285 <br /> L!!)t�DF CAL�F��� <br /> Figure 1 Potentiometnc Map <br /> Figure 2 Concentration Map <br /> Table I 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- Shell <br /> Attachments Standard Operating Procedure- Groundwater Sampling <br /> Field Data Sheets <br /> 11 192ni <br /> 6747 Serra Court , Suite J • Dublin , California 94568 ( 925) 551 - <br />