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TABLE 2 <br />TOTAL RECOVERABLE PETROLEUM HYDROCARBONS IN SOIL <br />EPA METHOD 418.1 <br />mg/Kg (ppm) <br />BORING DEPTH <br />SAMPLE - <br />. ID <br />TRPH trig/Kg <br />(141111) <br />B-3 0.5' B3-0.5 140 <br />B-3 13.5' B3-13.5 160 <br />B-4 0.5' B4-0.5 190 <br />B-5 0.5' B5-0.5 180 <br />B-6 0.5' B6-0.5 190 <br />B-6 8.0' B6-8.0 110 <br />B-7 0.5' B7-0.5 120 <br />B-7 13.0' B7-13.0 130 <br />MW-1 0.5' MW-1B/0.5 29 <br />MW-1 10.0' MW-1A/10.0 44 <br />MW-4 10.0' MW--4B/10.0 33 <br />As indicated in Table 2, detections of TRPH in Parcel III are not limited to the near surface soils. <br />TRPH in relatively low concentrations was detected in all samples collected from the capillary fringe in <br />Parcel III. However, TRPH was not detected above the detection limit of 20 ppm in a duplicate sample <br />collected from the capillary fringe in MW-1 (MW-1B/10.0). There is currently no regulatory criteria for <br />TRPH in soil. Action levels for TRPH in soil are generally evaluated by the Leaking Underground Fuel <br />Tank (LUFT) guidelines. The LUFT guidelines are specific for gasoline or diesel range hydrocarbons <br />and take into account the nature of the soil, depth to groundwater, precipitation, and the presence or <br />absence of volatile organic compounds (VOCs). EPA Method 418.1 is a gross screening method for <br />hydrocarbons and does not differentiate the type of hydrocarbons present. The concentrations of TRPH <br />detected in Parcel HI soils are generally low for the analytical method. <br />SAC28.013 <br />11 December 20, 1991 <br />N! ES Nt. Mt.71(1ZZI: