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wells after Lincoln Center voiced <br /> concerns that this activity could <br /> spread the plume to Wickland <br /> Properties . <br /> December 22, 1993 Vapor extraction system was off <br /> upon arrival of WEGE technician. <br /> Concurrently San Joaquin County <br /> PHS/EHD staff conducting field <br /> inspection, indicated that the VES <br /> was to remain off due to the <br /> Lincoln Center problem. System was <br /> not restarted. <br /> December 30, 1993 Date of letter from San Joaquin <br /> County PHS/EHD clarifying that the <br /> communications between PHS/EHD <br /> staff and WEGE technician was <br /> misconstrued and at our earliest <br /> convenience, please re-start the <br /> VES and in fact, the previous <br /> periodic ground water extraction <br /> was controlling the migration of <br /> the plume and the vapor extraction <br /> is decreasing the amount of <br /> hydrocarbons available to leach <br /> into groundwater <br /> February 18 , 1994 Date of letter from San Joaquin <br /> County PHS/EHD recommending we <br /> conduct a pump test and conduct <br /> additional analytical analysis (EPA <br /> Method 601) on wells closest to the <br /> Lincoln Property plume <br /> If you should have any questions, please call (916) 668--5300 . <br /> Sincerely yours, <br /> George L Converse <br /> Project Manager <br /> 7 <br />