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I r f <br /> 6 <br /> - 7-Eleven/Stockton <br /> August 1989 <br /> In March 1989, GTI submitted a work plan for further site <br /> ' assessment activitiese shallowAdditional <br /> ventplans <br /> pointswere <br /> and tomade <br /> exPandctheSe i <br /> flow rates through th <br /> soil-vent system to allow deeper influence and provide more <br /> - aggressive soil remediation. in April 1989, vacuum tests were <br /> conducted on existing and future soil-vent extraction wells. The <br /> feasibility of using a Catalytic Scavenger Incineration System <br /> for vapor treatment was confirmed. <br /> During this reporting period, groundwater levels have <br /> ed to decline. Subsequently, pumping rates have de- <br /> continued <br /> In May, 1989, pumping was discontinued in pW-1 due to <br /> pumping from RW-1 continued at a rate <br /> the lowered water levels. <br /> of 0.5 - 1.5 gallons per minute (gpm) • <br /> SCOPE of WORK <br /> - Services performed by <br /> GTI during this reporting period <br /> consisted primarily of regularly scheduled operation and <br /> maintenance of the remediation system, and monitoring and <br /> Specifically, the following <br /> sampling of the groundwater. P date <br /> Services have been conducted by <br /> GTI since the previous up <br /> report was submitted in May 1989: <br /> o Monitored on-site and off-site wells for depth-to- <br /> - water and depth-to-product on six separate occasions. <br /> o Sampled groundwater from thirteen monitoring wells and <br /> domestic wells for laboratory analyses- <br /> from ten nearby <br /> o r remediation and soil-vent <br /> Maintained the groundwate <br /> Systems, <br /> including sampling and analyses of the <br /> groundwater-treatment system influent and effluent. <br /> �ItN\HnGI �\� <br />