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ja--6ETTLER - RYAN INC. <br /> November 7,2002 � <br /> G-R Job#180138 <br /> Mr Edward C Ralston i <br /> Phillips 66 Company <br /> 1380 Lead Hill Road,Suite 120 <br /> Roseville, California 95661 <br /> RE. Third Quarter Event of September 30, 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 perfonned 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 Potentiometnc 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 /> Si rely, <br /> Deanna L Harding <br /> Project CoordinatorAG�gE�Q� <br /> G 'Y OC�'�t <br /> O 0 <br /> Na 72$5 � * <br /> Exp o► o <br /> Robert C Mallory <br /> Registered Geologist, No 7285 �OFCA1-��O <br /> Figure 1 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 qml Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925) 551 -7555 <br />