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Corrective Action Plan Page 20 <br /> Soil Sampling in Remedial Excavation <br /> As the excavation to remove contaminated soil proceeds, the exposed soil will be <br /> monitored for visual and olfactory signs of components of gasoline When the excavation <br />' has locally reached such depth and areal extent that no traces of gasoline appear to be <br /> present in the soil in the walls and floor of the excavation, or the extent of the excavation <br /> has reached the limits established above, an excavator will be used to remove blocks of <br />' soil from the walls and floor of the pit and raise them to the surface for sampling <br />' To obtain a sample, the surface of the block of soil in the bucket of the excavator will be <br /> cut with a trowel to expose an undisturbed surface A clean, 2 in diameter by 6 in long, <br /> brass, sampling tube will be driven into the cut soil face until the tube is completely filled <br />' with soil <br /> Following sample recovery, each sample tube will be cleaned externally, its ends covered <br />' with aluminum foil and closed with tightly fitting plastic caps The caps will be secured <br /> with adhesiveless tape Each sample tube will then be labeled for identification, entered <br /> into cham-of-custody control and packed on chemical ice for transport, within 24 hours, <br /> to the laboratory certified by the CEPA <br /> Each soil sample submitted to the laboratory will be analyzed for the following suite of <br /> analytes <br /> Analyte Method of Analysis <br />' Total Petroleum Hydrocarbons EPA Method 5030/8015 <br />' (as Gasoline) <br /> Benzene EPA Method 8020 <br /> Toluene EPA Method 8020 <br /> Ethyl Benzene EPA Method 8020 <br /> Total Xylenes EPA Method 8020 <br /> If the analyses of the soil samples indicate that components of gasoline are present at <br /> detectable concentrations, the depth or lateral extent of the remedial excavation will be <br />' extended, within the limits imposed by the previously established safety criteria, and the <br /> walls and floor re-sampled when remaining traces of gasoline are fudged to have been <br /> removed from the subsurface in the subject area Successive rounds of sampling and <br /> excavation will proceed, as necessary, until the floor and bottom of the pit are free of <br /> gasoline or the depth and lateral extent of the excavation has reached the pernnssible <br /> limas <br />