Laserfiche WebLink
RM M. <br /> RIM MW <br /> IF <br /> K <br /> 7 <br /> r� <br /> �I <br /> I <br /> r a <br /> ` Woodward-ClYdie Consuftants 3 <br /> F.� <br /> a <br /> +y <br /> *„ 4.0 <br /> CONCLUSIONS <br /> The investigation described in this report evaluated the extent of petroleum hydrxarbnf <br /> i. contamination and its impact (if any) on the soil and groundwater ne<sr the gasoline tank <br /> excavation. The following paragraphs present our conclusions related ti)our investigation. s <br /> 4.1 SOIL <br /> S TPH. Elevated levels of TPH(gasoline)were not encountered in the analyzed soil samples <br /> - collected during the subsurface soil investigation. The analytical results for these samples <br /> were below the detection limit of the analysis (0.5 mglkf;). No evidence of TP1"1 (gasoline) <br /> soil conta.�ninaticn was detected in the sm samples collected during this investigation in the <br /> area adjacent to the gasoline tank excavation. <br /> BTEX. Elevated levels of toluene and ethyl benzene were not encountered in the soil <br /> samples analyzed. The analytical results for these samples were below the detection limit <br /> f ` of the analysis (5 µg/kg for both toluene and ethyl benzene). Detect«ble levels at'benzene 3 <br /> were encountered in four of the nine samples analyzed. The highest concentration of <br /> benzene encountered in each boring correspvnds to the sail sample with the highest <br /> �-� headspace VOC concentration. These samples were rollected at ad epth of 51.1 to 51.5 feet <br /> 1+ in MW-1 (30 pglkg),50.6 to 51.0 feet in MNV-2 (6 lAgfkg)and 55.6 and 56.0 feet in MW-3 <br /> -n (76 ug/kg). Detectable levels of total xylenes wee encountered in three of nine samples s <br /> i <br /> ., analyzed, in two of the borings(v'iW-1 and MW-3). These samples;were collected:in MW-1 <br /> ;., at a depth interval of 51,i to 51.5 feet (33 ug/kg)and in MW-3 at depth intervals of 4 1.1 <br /> to 41.5 feet(270µg/kg)and 55.6 and 56.0 feet(42 pg/kg). No elevated level of B iFEX was <br /> encountered in any of the soil samples collected just above the groundwater interface. <br /> Lead. The analytical results for lead ranged from 2.8 mg/kg to 9.7 mglkg. These -` <br /> concentrations are believed to correspond to naturally occurring lead levels in the soil, <br /> 11 <br /> 1 � <br /> i 91CO2]SAdIdAlOAh1ART.WP 111-Q9.91lF'n.[S <br /> 4-1 <br /> w <br /> NIMBI <br />