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H. KLEIN FELDER & ASSOCIATES <br /> 3.2 SOIL SAMPLING PROCEDURES <br /> ' Soil samples will be collected continuously beginning at ground surface <br /> (just below asphalt/concrete) until ground water is encountered at <br /> approximately 43 feet below grade. Either a 5—foot long continuous <br /> sampler, 18—inch log Modified Porter sampler, or comparable devices will <br /> be used to obtain relatively undisturbed continuous samples. Soil <br /> samples, which are representative of each 2—foot interval, will be removed <br /> from the sampler ad placed in a polyethylene sample container. The <br /> remaining portion of each sample will be placed in a "zip—lock" type <br /> storage bag. Both sample storage devices will be labeled and <br /> appropriately marked with job number, boring number, sample depth, <br /> samplers initials, date, etc. <br /> Selected soil samples will be submitted under chain—of—custody to a DOHS <br /> certified laboratory for chemical and physical analyses. The DOHS and <br /> RWQCB will also obtain split samples for analyses by an independent <br /> laboratory. The remaining samples will be retained onsite for a minimum <br /> ' of one year after SI closure in the event that further testing is <br /> required. <br /> The following summary presents the sample selection process we will use to <br /> select samples for chemical and physical analyses: <br /> ' CLOSURE SAMPLES <br /> ' o Four samples will be selected randomly from the suite of samples <br /> collected at each boring locations. Therefore, a total of 12 <br /> samples will be selected. <br /> o One sample, from each set of four samples, will be split to <br /> >r <br /> ' provide a duplicate sample for QA/QC purposes. Thus, three <br /> duplicate samples will be selected. <br /> o The DOHS and RWQCB will be provided with splits of samples they <br /> select. <br /> 51-87-413 4 <br />