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r <br /> 7-Eleven/Stockton ]9 <br /> August 1989 <br /> Domestic Wells <br /> Well Y.D. Sampling Freguency <br /> TMG Monthly <br /> 1912 Monthly <br /> 1927 Monthly <br /> 8968 Monthly <br /> 9160 Monthly <br /> 9140 Quarterly <br /> 9156 Quarterly <br /> 9159 Quarterly <br /> 9167 Quarterly <br /> During this reporting period five monitoring wells were not <br /> �p available for groundwater monitoring and sampling. Prolonged <br /> r regional drought conditions have caused groundwater; levels to <br /> ' decline sharply. As a result, MW-2, MW-3 and MW-4 have gone dry. <br /> Monitoring well MW-6 is no longer in service, since it was <br /> -.r abandoned in September 1986 due to the reconstruction of Thornton <br /> Road. MW-12 is also no longer available, because a stuck pump <br /> has obstructed it since January 1987. <br /> REMEDIATION SYSTEMS <br /> E ; <br /> cue <br /> The remediation systems currently operating at the site <br /> ? ' consist of a groundwater-extraction system and a soil-vent <br /> system. The groundwater-extraction system consists of pumping <br /> wells designed to depress the water table and remove free product <br /> and an air stripper designed to treat the dissolved constituents <br /> I '' <br /> in the groundwater. The soil-vent system was installed to <br /> control hydrocarbon vapors and to aid in reducing the adsorbed <br /> contamination in the vadose-zone soils near the tank pit. <br /> �"� c�H�rl.E�ttul.Er - <br /> ' �Li!!\nl r rr.t Int <br />