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GETTLER - RYAN INC. <br /> July 19, 2002 <br /> G-R Job#180138 <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 June 6 and 7, 2002 <br /> Groundwater Monitoring&Sampling Report <br /> Former Tosco (Unocal) Service Station#6981 <br /> 4707 Pacific Avenue <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) <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 A Potentiometric Map is 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 /> LWJMW <br /> i 6 <br /> Deanna L Harding <br /> Project Coordinator QprjFESS/Oy <br /> CO <br /> Q M <br /> LUNO C Zo <br /> 5� m <br /> Hagap Kevork cc <br /> Exp. n� <br /> P E No C55734 <br /> Figure 1 Potentiometric Map jF oCIVI\I <br /> Figure 2 Concentration Map F C AL <br /> Table l Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results -Oxygenate Compounds <br /> Table 3 Groundwater Analytical Results <br /> . Attachments Standard Operating Procedure - Groundwater Sampling <br /> Field Data Sheets <br /> 6981 qm1 Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J . Dublin , California 94568 ( 925 ) 551 -7555 <br />