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E T T L E R - YA <br /> March 7, 2001 . <br /> G-R Job#180137 <br /> Mr Edward C Ralston - <br /> Tosco Marketing Company <br /> 1380 Lead Hill Road, Suite 120 <br /> =Roseville, California 95661 = - <br /> - =RE = First QuarterEventof February=5 and-6,2001- <br /> Groundwater <br /> nd=6,2001Groundwater Monitoring &Sampling Report <br /> Tosco (Unocal) Service Station#5886 <br /> 2701 West March Lane <br /> Stockton, California <br /> Dear Mr Ralston <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc (G-R) at the referenced site All field work was conducted in accordance with G-R Standard Operating <br /> Procedure- 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 <br /> groundwater 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 Standard Operating Procedure <br /> - Groundwater Sampling (attached) The field data sheets are also attached The samples were analyzed by <br /> Sequoia Analytical Analytical results are summarized in Tables 1 and 2 A Concentration Map is included as <br /> Figure 2 The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> BRED GEC <br /> eanna L Hardin �,�O�t;LAS ��c�s� <br /> Project Coordinator p F <br /> No 6882 <br /> Doug )eologist, <br /> e <br /> Senior R G No 6$82 ��T�OF C �,�OQ-�` <br /> Figure 1 Potentiometric Map-Shallow Zone <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> 5886 qmt Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 (925) 551 - 7555 <br />