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ffy <br /> 1'y fi" <br /> 7--Eleven/Stackton q <br /> October 1988 <br /> f*• <br /> efficiency of the remediation systems, a new recovery well was <br /> installed and improvements were made on the existing treatment <br /> equipment during the month of February 1988. <br /> A more detailed account of the previous site work as well as <br /> a description of the site geology and hydrogeology were presented <br /> in GTI's reports titled ' Project Update Report, 7-Eleven Store, <br /> 911.0 Thornton Road, Stockton, California" dated September 1987 <br /> and April 1988. <br /> SCCPE OF WORK <br /> Services performed by GTI during this reporting period <br /> consisted primarily of regularly scheduled operation and <br /> maintenance of the remediation system, and monitoring and <br /> sampling of the groundwater. This work was performed to continue <br /> to remove hydrocarbon contamination which has adsorbed to the <br /> t; soil, dissolved in the groundwater and accumulated as free <br /> product on the water table. The monitoring and sampling was f <br /> conducted to determine the levels of dissolved hydrocarbons in <br /> the groundwater and to verify that nearby domestic wells have not <br /> i6 been impacted with gasoline hydrocarbon contamination. <br /> s� Specifically, the following services were performed by GTI since <br /> ' the previous update report in April 1988: <br /> s� <br /> a Monitored on-site and off-site wells. <br /> ' Sampled groundwater from monitoring wells without <br /> free product and nearby domestic wells for <br /> laboratory analysis. <br /> . . Recorded the volume of product in the underground <br /> storage tank. <br /> '.... :.GROt'NOWATF.H <br /> TF:CkrNuLtx}'.I\C. <br />