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I43 FTTLFRc.YANN <br /> January 18, 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: Fourth Quarter Event of December 12 and 13,2001 <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 field work 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 as specified by G-R Standard Operating Procedure <br /> -Groundwater Sampling(attached) The field data sheets are also attached The samples were analyzed by Sequoia <br /> Analytical Analytical results are summarized in Tables 1, 2 and 3 A Concentration Map is included as Figure <br /> 2 The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> DeannaL Harding Q,?'oESS/ON <br /> q� <br /> Pi olect Coordmatoi ��t� QP KE1/0 F <br /> Co <br /> d No C 55734 m <br /> * Exp I�� <br /> Hagop Kevork Q. <br /> d, <br /> P E No C55734 �9TC1\P1 a\ <br /> F OF C AL1��� <br /> Figure l Potentiometric 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 Groundwater Analytical Results <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> 6981 yml Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925) 551 -7555 <br /> E <br />