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I _ <br /> Groundwater Sampling Procedure <br /> 1 . Remove all casing caps from the groundwater monitoring wells. Allow the water <br /> levels to stabilize. <br /> 2. Using the oil/water interface probe, measure the depth to water (DTW) and total <br /> depth (TD) in each well. <br /> Ta. Start with the least contaminated well (MW-3) . <br /> b. Measure the depths from the top of casing (TOC) . <br /> c. Decontaminate the probe after each well. <br /> d. Record the results in Table 2: Well Measurements. <br /> e. The depths should be recorded to the nearest 0.01 foot. <br /> Al <br /> Table 2 : Well Measurements <br /> Well Number DTW (ft. ) TD (ft.) <br /> MW- 1 <br /> MW-2 <br /> MW-3 <br /> MW-4 <br /> f. For MW-2, measure the free product thickness. FPT: <br /> g. Calculate the corrected depth to water using the following equation and <br /> record. <br /> CDTW = DTW — (FPT * SG) <br /> E <br /> where, CDTW = Corrected Depth to Water <br /> DTW = Original Depth to Water <br /> FPT = Free Product Thickness <br /> SG = Specific Gravity (Fuel Oil =0. 82 — 0. 95) <br /> CI <br /> 3 . Note the condition of each well in Table 3 : Well Condition. <br /> Table 3 : Well Condition <br /> Well Number Seal at Grade Well Cap Additional <br /> MW- 1 <br /> MW-2 <br /> MW-3 <br /> 2 <br /> t � <br />