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t KLE/NFELOER <br /> Bright People.Night Solutions. <br /> includes a summary of the proposed sampling and analyses plan (SAP). This table also <br /> includes sampling and analyses of two monitoring wells which is detailed further under <br /> Task 3. The attached table cross references Plate 1, which depicts proposed boring <br /> locations that are color-coded based on the general type of source contamination <br /> potential. <br /> Kleinfelder is proposing advancement of 33 shallow pushprobes to a depth of 5 feet <br /> below ground surface (bgs), with the exception of one boring which is proposed to a <br /> depth of 10 feet based on a former documented spill and anticipation that deeper <br /> depths may need to be evaluated. In all cases, field evidence of contamination at the <br /> 5-foot depth will indicate the need to advance borings to at least 10 feet or at such <br /> depth above groundwater in which evidence of contamination is no longer evident. <br /> These 33 probes will be advanced at locations shown on Plate 1, although actual <br /> pushprobe locations will be dependent on access, surface conditions, and potential <br /> interference with subsurface and above-ground utilities. Based on our experience, we <br /> expect groundwater to be approximately 33 feet bgs: therefore, we do not anticipate <br /> encountering groundwater at the proposed pushprobe locations. Kleinfelder anticipates <br /> that a truck or track mounted rig can be used on most of the locations, but that a limited <br /> access pushprobe rig and hand auger techniques will also be needed to explore the <br /> areas noted. <br /> Pushprobes will be advanced using a pneumatically driven steel probe. Soil samples <br /> will be obtained by inserting a sample barrel, lined with acetate liners, into the ground. <br /> The sample barrel will be lowered to the desired sampling interval and driven into the <br /> soil. Very limited access areas will be sampled by hand utilizing pre-cleaned stainless <br /> steel hand augers. Hand auger soil samples will be collected by slide-hammering a <br /> hardened steel sampler containing a stainless steel tube. Soil samples will be collected <br /> continuously during the advancement of the pushprobes and hand augers. Sample <br /> liners removed from the selected sampling intervals will be sealed with Teflon sheets <br /> and plastic end caps. <br /> The push probe core barrels and stainless steel hand augers will be decontaminated <br /> between sample locations with a LiquinoxO (laboratory-grade detergent) and potable <br /> water wash and a distilled water rinse. Care will be taken to remove and/or avoid <br /> sampling slough at the bottom of borings prior to collecting each discrete sample. <br /> During the advancement of the probes and borings, soil samples will also be collected <br /> for lithologic classification and qualitative field screening using a Photo Ionization <br /> Detector (PID). The PID measures ionizable compounds in air in parts per million by <br /> volume (ppmv). Lithologic classification will be based on the Unified Soil Classification <br /> System. <br /> Kleinfelder proposes collecting 2 soil samples in 32 of the 33 probes, with 3 soil <br /> samples collected in one boring (probe 1 SA). Soil samples will be collected at 1 and 5 <br /> feet bgs, with a 10 foot sample also collected from 1 SA for potential chemical analyses. <br /> 114050.WP/ST012P0580 Page 3 of 8 July 16, 2012 <br /> Copyright 2012 Kleinfelder <br />