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r+ lP.�Yir iP EV2Myn1� <br /> 1 <br /> 1A <br /> E <br /> _ 7-Eleven/Stockton 4 <br /> November 1990 <br /> o Monitored on-site and off-site wells for depth-to-water <br /> and depth-to-product on three separate occasions. <br /> o sampled groundwater from twelve monitoring wells, two <br /> - <br /> monitoring well clusters, and one recovery well in <br /> August, 199U. <br /> o Sampled groundwater from domestic wells TMG, 1912, <br /> 1927, 8968, 9140, 9156, and 9172 on three occasions. <br /> Sampled groundwater from the domestic well 9150 on two <br /> y occasions. <br /> o Maintained the groundwater-treatment system through <br /> early August 1990, including monthly sampling and <br /> ». analyses of the groundwater-treatment system influent <br /> and effluent. <br /> GROUNDWATER MONITORING <br /> -� Monitoring of the groundwater elevation in the monitoring <br /> wells was conducted three times during the reporting period, on <br /> July 19., August 24, and September 24, 1990. These monitoring <br /> data are presented in Appendix A. Groundwater monitoring was <br /> performed in accordance with Groundwater Technology Standard <br /> Operating Procedure (SOP) 8 (Appendix B) . <br /> - rrr <br /> Analysis of the groundwater monitoring data indicates that <br /> groundwater elevations have decreased an average of 2.19 feet <br /> during this three-month reporting period. The depth-to- <br /> groundwater at the site is approximately 48-feet below ground <br /> surface. The groundwater-':able elevation is approximately <br /> 36•-feet below mean sea level (msl) <br /> .-. A GROUNDWATER!� <br /> 3 ECHNOLOCY,LNC. <br />