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M <br /> John M. Minney, Consulting Engineer <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: Workplan <br /> Vault Closure <br /> Bunker C Oil <br /> Tracy, California <br /> Dear Anne <br /> As requested, I met with Harlin Knoll of San Joaquin County pursuant <br /> to a fuel oil vault on the Tracy facility The vault is shown on the <br /> attached Site Plan, Figure 1 . <br /> The vault is a former Bunker C fuel oil site which has not been used <br /> in over 30 years . <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 125 feet <br /> from the release which is outside the zone of soil contamination which <br /> could result from Bunker C oil The last two results are summarized <br /> in the following table For some constituents, there were two <br /> separate tests run on the same sample Only those constituents which <br /> were detected are listed in the table. i <br /> 3 Constituent 9-24-98 12-11-98 <br /> mg/l mg/1 <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 /> i <br />