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cs <br /> �. samples have been collected, the samples will be delivered to the <br /> laboratory along with the accompanying chain-of-custody forms. <br /> - Samples of first aquifer formation will be collected for sieve analysis <br /> and permeability testing. Samples of any underlying clay will also be <br /> V collected for permeability testing. <br /> Wim Of CMk=iMtRd&=kni_'gd Soil <br /> Approximately 100 samples of the contaminated stockpiled soil will <br /> be collected(2 samples for each. 50 yards of the estimated 2500 yards <br /> presently stockpiled) to characterize the soil for purposes of <br /> remediation permitting procedures. These samples will be taken <br /> throughout the length of the pile of contaminated soil at a minimum <br /> depth of 1 foot below the surface. Every 10 sample�j.will be composited <br /> to produce a total of 10 samples for analysis. Each'composite sample <br /> will represent a different section of the pile as depicted in Figure 2-1. <br /> Cu <br /> . A <br /> y" Drill cuttings will be segregated and stockpiled along with the <br /> r <br /> .; existing stockpiled soil. <br /> ,.j <br /> '�✓ <br /> All bore holes will be backfilled with a grout mix consisting of sand, <br /> cement, bentonite powder, and clean water in the following ratios: <br /> One 94 lb sack of Portland cement; <br /> Two sacks of Lonestar 120 sand; <br /> } 5 lbs of bentonite powder;and <br /> • 4.5 to 6.5 gallons of clean water. <br /> — Water L wlI.eynl N[e&% entg <br /> ___Groundwater-elevations will-be-measured in-three-of-the-open-bore = ----- <br /> —.---------------Groundwater <br /> - holes in relation to a permanent on-site reference point. If bore holes <br /> do not remain open, then water levels will be taken in three of the <br /> hydropunch locations through the hydropunch probe. Nater Ievels <br /> will be determned using the wetted tape method. All water Ievels <br /> will be measured at the same time 24 hours after boring installation. <br /> The water elevations will be used to determine the groundwater <br /> — gradient and direction of flow. <br /> 2,4 <br />