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John M. Minney, Considltriing lagi%ee 17 <br /> 11976 Road 37 <br /> JMM Madera Ranchos, CA 93638 <br /> (209)275-5937 (209)645-1437 <br /> January 29, 1999 JOB 96017 <br /> Anne Ogrey <br /> Spreckels Sugar , <br /> P O Box 60 <br /> Tracy CA 95378 <br /> SUBJECT: -WLair <br /> Underground Tank Closure <br /> Site B <br /> Tracy, California <br /> Dear Anne . <br /> As requested, I met with Harlin Knoll of San Joaquin County pursuant <br /> to an underground tank closure at Site B on the Tracy facility. Site <br /> B is shown on the attached Site Plan, Figure 1 . <br /> Site B is a former underground storage tank site where the tank was <br /> removed, a partial soil cleanup performed, soil and groundwater <br /> testing performed, and a new facility has been constructed. <br /> The purpose of the workplan is to present a scope of work sufficient <br /> for the County to determine that no further action is required at the <br /> site <br /> You currently perform an ongoing monitoring program on Well B, with <br /> recent test results attached The depth to groundwater is about ten <br /> feet and the direction of flow is towards Sugar Cut . Well B is <br /> therefore a shallow, downgradient monitoring well . Well B is also so <br /> close to the release that it is likely inside the zone of soil <br /> contamination The last two results are summarized in the following <br /> table . For some constituents, there were two separate tests run on <br /> the same sample Only those constituents which were detected are <br /> listed in the table <br /> Constituent 9-24-98 12-11-98 <br /> mg/l mg/l <br /> Benzene 0 8/0 . 65 1 .3/0 . 096 <br /> Toluene 0 .041/0 .022 0 .067 <br /> Xylene 0 .097 0 .21 <br /> Ethylbenzene 0 .12/0 .09 0 .3/0 .2 <br /> MTBE 0 .062 <br /> n-propylbenzene 0 .008 <br /> 1, 2 ,4-Trimethylbenzene 0 .005 0 .02 <br /> Xylene 0 .055 0 . 11 <br /> Chloroform 0 . 02 <br /> TPH(g) 2 1 3 .6 <br />