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Corrective Action Plan <br /> Page 36 <br /> spread not previously sampled) until sufficient have been analyzed Conversely, if the field <br /> data shows that the number of samples may be decreased while maintaining the statistical <br /> confidence of the evaluation as to the cleanliness of the treated soil, the number of samples <br /> gather in any subsequent sampling rounds will be adjusted downward as appropriate <br /> When the samples of the aerated soil have been analyzed, the results will be reviewed to <br /> determine whether or not they show that the cleanup criteria has been met with sufficient <br /> statistical confidence If it has not, the spread soil will be subjected to further rototilling <br /> and left to aerate for a further period and then re-sampled (Note In any second, or <br /> subsequent, sampling that may be required, the sub-area of the spread from which samples <br /> will be taken will be selected randomly except that any sub-area that was sampled in a <br /> previous round and the sample from which contained no detectable components of <br /> gasoline will be orrutted from the population of sub-areas from which new random <br /> sampling Iocations are selected <br /> The procedure for recovery of specimens of the treated soil from the <br /> randomly selected sampling locations will be as described below <br /> At each sampling point a small pit will be excavated so that its bottom is at least 3 in <br /> below the surface of the spread soil A clean, 2 in , diameter by 6 in long, brass, sampling <br /> tube will be driven into the wall at the bottom of the sampling pit until the tube is <br /> 1Pcompletely filled with soil <br /> Followingrecovery,sample p 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 chain-of-custody control and packed on chemical ice for transport, within 24 hours, <br /> to a laboratory certified by the CEPA <br /> Each sample of aerated soil submitted to the laboratory will be analyzed for the following <br /> suite of 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 />