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1 ttH�,ta.4satxsTwh MemoftsCh,racei, mw,zfSku wam Soil is a& AP112016 However, in some cases, samples were sullecrod at different depths within the bereholes: (p to sample soil located adjacent to metal debris, or (2) due to auger refusal at a depth shallower than 15 ❑, ere example, only two soil samples wert collectef fmm boreholes B-BOSA-302), -3036, and -3037 due to auger refusal All soil associated with metal debris was sampled and submitted for SVOCPAH, and PCB analyses. Table 1 includes the depths at which routine and duplicate sample were collected within each borehole, and the pregame of debris and/or soil staining. The Work Plan specified that a total of 40 subsurface soil samples, including 36 sail samples and four QC duplicate samples, would be collected for SVOC/PAH and PCB analysis. However, because a depth of 15 R could not be achieved in all potholes, a taw] of 35 soil samples and three QC duplicate soil samples were collected. SmUmek samples were remind in 2.5-inch (in) diameter x 6-in long boss or steel lines. One 6-in long sample was collected just above each sampling depths in each borehole nor VQC monitoring with a hand-held Organic Vapor Analyzm and was used by 0te drilling geologist to describe lithology. Two 6-in long samples were Collected at each sampling depths in each borehole for SVOCIPAH and PCB analysis. Where metal debris was encountered in the bomholes, samples from that depth were submitted for analysis. In addition,, a total of three duplicate subsurface soil samples were collected from different randomly selected boreholes for QC purposes. Each of these duplicate samples were split into two samples and placed in separate Qmpak jars once the soil had been llwmughly mixed and homogenized. Two of the splits were used for inter-laboratory comparisons and one used far lobo-laborory comparison. "I'he intm-laboratory splits were given surrogate sample identifications. All sample liners were marked and labeled (location, depth, damdime, ene.) and capped For laboratory analyse. Upon collection, the samples were placed in an use chest W maintain the required 4 degrees centigmde ("C) romped m. At the end of each day, the ice chests containing samples collated that day and accompanying chain-of-custody documentation were transferred rer for transport to the analytical labo re laboratories. Sample control and documentation we conducted in accordance with the procedures described in Appendix A of the Work Plan (Pert' a al., 2014). Analytical sample cusody and the analytical sample custody logbooks were handle) accoNirrgro LLNL SOP 42 Sample (bmral and Documentation (Goodrich and Lorega, 2012). The SVOCIPAII and PCB analytical results of the mutine and duplicate QC subsurface soil samples are discussed in Section 4. In addition to duplicate soil samples, other QC samples collected in the field included: • Trip blanks provided by the analytical laboratory that was submitted with each chainof- custody sheet. • A field blank poured at the sampling location to identify contamination that may aceur during the sample collection process. • lquipment (ragged blanks collected during the equipment decontamination prvselure. The analytical results for these additional Held QC samples are discussed in Section 3.5.