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5608 N PERSHING AVE <br /> PAGE 11 <br /> PIPING <br /> The confirmation soil sample obtained from the over-excavation of the piping area of P-1 at <br /> a depth of 5.5' BGS did not detect TPH as gasoline or BTEX at detection limits of 1.0 ppm <br /> and 0.005 ppm, respectively. <br /> DISPENSER AREA <br /> The soil sample obtained from approximately 1.5' BGS in the area just west of the former <br /> western dispenser area (that had visual and olfactory evidence of contamination at the time <br /> of the asphalt removal) did not detect TPH as gasoline or BTEX at detection limits of 1.0 <br /> ppm and 0.005 ppm, respectively. <br /> WASTE OIL PIT <br /> The two bottom and five sidewall confirmation soil samples obtained from the finished <br /> excavation showed nondetect for TPH as gasoline, TPH as diesel, TOG, and BTEX at <br /> detection limits of 1.0 ppm, 1.0 ppm, 5.0 ppm, and 0.005 ppm, respectively. Cadmium, <br /> chromium, nickel and zinc were detected in all samples at various low levels. Lead was not <br /> detected in any of the samples at a detection limit of 5.0 ppm. <br /> FUEL TANK PIT <br /> Three confirmation bottom samples were obtained and all three did not detect TPH as <br /> gasoline or BTEX at a detection limit of 1.0 ppm and 0.005 ppm, respectively. The eleven <br /> sidewall confirmation samples did not detect TPH as gasoline or BTEX contamination at <br /> detection limits of 1.0 ppm and 0.005 ppm,respectively,except for samples TX-26 and TX-27 <br /> which showed TPH as gasoline and BTEX at 6.0 ppm, less than 0.005 ppm,less than 0.005 <br /> ppm, 0.010 ppm, and 0.016 ppm, respectively, for TX-26, and 3.0 ppm, less than 0.005 ppm, <br /> less than 0.005 ppm, 0.006 ppm, and less than 0.005 ppm, respectively, for TX-27. <br /> SOIL SPOIIS <br /> The contaminated soil removed from the waste oil tank pit area and the gasoline tank pit <br /> area was removed from the site and taken to Forward Landfill for treatment and disposal. <br /> Any soil from these two tank pit areas ultimately used as backfill was discreetly sampled every <br /> 25 cubic yards and was determined to be nondetect for TPH as gasoline and BTEX at <br /> detection limits of 1.0 ppm and 0.005 ppm, respectively. <br /> 07-15-93 Meeting held this date between RP, PO and PHS/EHD. The results of the over-excavation <br /> and any remaining work needed for closure were discussed. The PO has a potential new <br /> lessee for the site and they will need to destroy some of the monitoring wells at the site to <br /> build a building. It was determined that at least two additional groundwater sampling events <br /> will be conducted prior to the need to destroy the wells. <br /> 07-30-93 PHS/EHD issues permit #93-1483 this date to destroy monitoring wells MW#1, MW#2, <br /> MW#2A, MW#3, MW#4, MW#5, MW#5A AND MW#6. <br /> 08-03-93 The wells noted above were destroyed this date. Soil samples were obtained from the bottom <br /> of the shallow wells at approximately 33' BGS. No odors or soil discoloration noted during <br /> the overdrilling activities. <br /> 08-23-93 PHS/EHD receives groundwater monitoring report for sampling conducted in June 1993. <br /> Depth to.eater ranged from approx.29.69'BGS to 36.22' BGS. Groundwater flow direction <br /> was consistent to the north northeast. Water was sampled from monitoring wells MW#4A, <br /> MW#5, MW#5A, MW#8,MW#9, MW#10,and MW#11. All wells showed nondetect for <br />