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4 i <br /> 6ETTLER - RYAN INC. <br /> July 11, 2002 <br /> G-R Job#180288 <br /> Mr Edward C Ralston <br /> Phillips 66 Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville, California 95661 <br /> RE: Second Quarter Event of May 31,2002 <br /> Groundwater Monitoring &Sampling Report <br /> Tosco(Former BP) Service Station#1 1192 <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 ground warter monitoring event was scheduled but not conducted on the <br /> same date with the Former Shell 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 l 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 /> Sincerely, <br /> 6Q, <br /> Deanna L Harding <br /> Project Coordinator QROFESS/p� <br /> r CO <br /> j ; <br /> W No C 55734Cc <br /> , <br /> Hagop Kevork Exp <br /> �3 <br /> P E No C55734 'ir <br /> s�q� <br /> Figure I Potentiometric Map CIW_ <br /> F F � <br /> Figure 2 Concentration Map oC ALSF <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results - Oxygenate Compounds <br /> • Table 3 Dissolved Oxygen Concentrations <br /> Table 4 Joint Groundwater Monitoring Data- Shell <br /> Attachments Standard Operating Procedure - Groundwater Sampling <br /> Field Data Sheets <br /> i 1192 yml Chain of Custody Document and Laboratory Analytical Repoi is <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />