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p <br /> S <br /> filter pack will extend from a depth 2 feet above the top of the <br /> screen to 1 foot below the bottom of the casing, except where <br /> depths to watertlare less than 10 feet. The filter pack will be <br /> sealed with a minimum of 3 feet of bentonite pellets and a neat <br /> cement grout to the surface. The top of each well will- be <br /> completed and secured with a wat.a.r-t.i ght• #-ra-f f i ; ).;x that can be <br /> opened only with a special wrench, and a locked well cap will be <br /> installed to further discourage unauthorized access and <br /> vandalism. A tag with the well number, well type, depth of well, <br /> perforated intervals, and well diameters will be attached to the <br /> interior of the! well cover. <br /> If no ground water is encountered or if ground-water monitoring <br /> is not desired, i each soil boring will be Completely sealed. Neat <br /> cement will be used to grout <br /> r�C�r1�the <br /> ,' boring from ground surface to <br /> - <br /> the bottom of the boring. t �LA is I'S FTL <br /> Fftlt- vu�� Yf s <br /> During drilling; undisturbed soil samples will be acquired at <br /> 5-foot intervals from the surface down to the total depth of the <br /> bore hole, using a California modified split-spoon sampler with <br /> brass liner . Although sampling below the water table is not <br /> required, it will be done if it is deemed useful in the <br /> characterization of the soil profile. The required sample at the <br /> termination of a dry boring will, be taken, regardless of the <br /> sampling interval. . Before each sample the downhole equipment <br /> jwill be steam-cleaned or washed with a trisodium phosphate <br /> 3 <br /> detergent and then rinsed with tap water, distilled water, and <br /> acetone, in that order. <br /> # All soil samples will be screened for hydrocarbon content with an <br /> organic vapor analyzer (OVA) . After collection and screening, <br /> the sample will be capped with aluminum foil. and PVC caps and <br /> placed on ice. Selected samples will be shipped to a state- <br /> certified analytical laboratory within 24 hours. The soil <br /> samples collected from just above the water table and samples <br /> with OVA-detectable fuel contamination will be analyzed for total <br /> f <br /> c12/10118 . 04 2 <br />