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- <br /> OWLAM- ] <br /> '►AKA 06. 111$1.01 <br /> May 24, 1961 <br /> Page 4 <br /> r.' <br /> excavation at a depth of 14 feet within 15 minutes after the hold-down slab was removed. <br /> A ground water sanoe (E 1) was Coen of this water after enough water had infiltrated the <br /> excavation. Loo646tis of thegear water sarle and soil samples collected during the <br /> excavation and summary of their analytical results are presented on Plate 2 and Table 1, <br /> respectively. <br /> Product,Piping TLengh Sgils Ex v iron <br /> Excavation consisted of removing approximately 25 cubic yards of soil from the vicinity of the <br /> product piping to depths of seven feet below grade using a backhoe. The soil removed was <br /> stockpiled onsite for later sampling. Soil samples were collected at depths of 7.4, 3.5 and <br /> ;. 7 feet (Samples P1, P2 and P3, respectively). locations of soil samples collected during the <br /> excavation and summary of their analytical results are presented on Plate 2 and Table 1 , <br /> respectively. <br /> Upon completion of the two excavations, and prior to backfilling, four samples from each of <br /> the two stockpiles of excavated material were collected and composited in the laboratory <br /> (STK/C - composite sample from tank excavation stockpile; STK1 - composite sample from <br /> product piping excavation stockpile) to determine if the stockpiled soils were clean and <br /> a, p p p 9 <br /> •. suitable for re-use as backfill material. Laboratory test results revealed both stockpiled soils <br /> to contain non-detectable-levels.of the svbstances tested for Based,on these results the soils <br /> ix removed from thi <br />