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Spreckels Sugar Tracy, California JOB 96017 <br /> All of the detected constituents are related to gasoline, for which <br /> there is a closer release to account for their presence. There is no <br /> indication from the tests that Bunker C is present <br /> Bunker C fuel oil is non-hazardous, not soluble in groundwater, <br /> contains no carcinogenic components, and has extremely limited <br /> mobility in soil . <br /> The vault is located between the railroad tracks and the molasses <br /> tank It is not possible to put a drill rig downgradient of the <br /> vault <br /> In order to achieve a determination that no further action is <br /> required, the following items will be evaluated <br /> (1) There should be a monitoring well in the downgradient direction in <br /> the shallow groundwater which shows no significant concentrations of <br /> Bunker C hydrocarbon constituents. Well B will be used for that <br /> purpose An additional sample will be tested specifically for Bunker <br /> C components This will be accomplished by giving the certified <br /> laboratory a sample of Bunker C oil to use as the calibration standard <br /> for the Total Petroleum Hydrocarbon test . <br /> (2) There should be an additional soil boring to establish the point <br /> at which Bunker C is no longer present in the soil Based upon my <br /> experience with Bunker C oil, that distance is 30 feet A test hole <br /> would therefore be hand augered at a distance of 30 feet from the <br /> vault in the downgradient direction, as shown on Figure 2 . During the <br /> hand augering, undisturbed soil samples would be taken at 51 , 101 , and <br /> 15 " deep The soil samples would be submitted to a certified <br /> laboratory for the Total Petroleum Hydrocarbon test using Bunker C as <br /> the calibration standard. In the event that it was in the zone of <br /> impacted soil, we would move out 30 more feet and redrill . The soil <br /> boring would be logged by a licensed geotechnical engineer <br /> (2) At the time the monitoring well was sampled, the groundwater <br /> elevation at all the wells would be established. The groundwater <br /> contour map would be prepared. I am licensed to perform surveys in <br /> the State of California <br /> (3) The well would be purged of at least 5 well volumes before <br /> sampling A teflon bailer would be used to sample The person would <br /> be a Class A Title 22 sampler. The samples would be placed in bottles <br /> provided by the testing laboratory. The samples would be kept in an <br /> ice chest with blue ice for delivery to the certified laboratory in 24 <br /> hours . Chain of custody would be established. <br /> (4) APPL Laboratories of Fresno would be the certified laboratory <br />` performing the testing. The groundwater sample would be tested for <br /> TPH calibrated against a Bunker C standard. <br /> • 2 <br />