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INC.(JETTLER - RYAN N <br /> r, April 6, 2001 <br /> G-R Job#280047 <br /> Mr Nick Nickerson <br /> Unocal -DBG/AMG <br /> 8788 Elk Grove Boulevard <br /> Building 3, Suite 15 <br /> Elk Grove, California 95624 <br /> RE: First Quarter Event of March 21, 2001 <br /> Groundwater Monitoring &Sampling Report <br /> Former Unocal Service Station #0123 <br /> 1034 Central Avenue <br /> Tracy, California <br /> Dear Mr Nickerson <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 hydrocarbons <br /> • Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater elevations are <br /> 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 through 4 A Concentration Map is included as Figure 2 <br /> The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> LmAt,'I� 4 <br /> Q4pF7rSS�p�q <br /> Deanna L Harding �� OP KE ! <br /> Project Coordinator � �� V4,p�2c <br /> Z <br /> rn <br /> No C 5573 m <br /> Hagop Kevork * Exp <br /> PE No C55734 `rl CIV11- <br /> Figure 1 Potentiometric Map 9TF OF CAI�F�¢ <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results <br /> Table 3 Groundwater Analytical Results- Oxygenate Compounds <br /> Table 4 Groundwater Analytical Results(EPA Method 8010) <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 0121 yml <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />