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�Cc OAKLAND PO 7/1 <br /> J <br /> 8810197TWP CON-4 <br /> The soil cuttings from the borings will be stored on-site in 55-gallon <br /> drums, and appropriately labeled by WCC personnel pending the results of <br /> chemical analyses. If the chemical test results show that the soils and <br /> ground water encountered are not hazardous in accordance with state <br /> criteria, then they may be disposed of at the site. If the chemical test <br /> results show the soils are hazardous then they can remain in the drums at <br /> the site in a fenced area up to 90 days. Groundwater removed from the <br /> wells during sampling and development operations will be settled in 55- <br /> gallon drums and the supernatent disposed to the on-site acid waste <br /> treatment system during the weekend at rates not to exceed 2,000 gallons <br /> per. day. <br /> Relative surface elevations of the new monitoring wells will be accurately <br /> determined by surveying. An accurate site plan will then be prepared <br /> showing all monitoring well locations and elevations at the site. With <br /> this information, site hydrogeology would be determined and presented in <br /> plan and profile drawings. These drawings would include an accurate <br /> determination of shallow ground-water elevation contours, flow directions <br /> and gradients. They would also depict the presence of any substantial <br /> vertical ground-water barrier(s), e.g. , a clay aquitard, which may underlie <br /> the shallow ground-water zone. <br /> Soil and ground-water samples will be obtained following standard sampling <br /> and equipment decontamination procedures. Prior to and during all field <br /> exploration operations, the drilling equipment will be thoroughly cleaned <br /> using a high pressure steam cleaner. Between soil sampling intervals, <br /> sampling equipment will also be thoroughly cleaned using the steam <br /> cleaner. Brass soil sample tubes, glass VOA bottles and teflon bailers <br /> will be cleaned using an Alconox detergent solution followed by a triple <br /> deionized water rinse. Ground-water samples will be taken only after at <br /> least 3 to 5 well casing volumes of ground-water have been pumped from the�' <br /> t <br />