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1 KL EINFEL DER \\ Bnght Feople.Fight SOlut,o,s. TABLE 2 GROUNDWATER SAMPLING RESULTS Sample Sample TPH-D TPH-MO B T E X Oxygenates` VOC's MtBE Location Date mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L B-1 (water) 9/2/10 14 ND ND ND ND ND ND 1, 2, 3 ND '= MTBE, TBA, DIPE, TAME, EtBE mg/L= milligrams per liter(parts per million) ug/L= microgram per liter(parts per billion) ND = analyte not detected at or above the laboratory reporting limit B= benzene, T=Toluene, E=ethylbenzene, X=Total Xylenes MtBE=Methyl tert-butyl Ether 1=sec-butylbenzene, 8.4 ug/L 2=tert-butylbenzene, 2.7 ug/L 3=lsopropylbenzene, 1.1 ug/L The laboratory reports are shown in attachment A. CONCLUSIONS There were no detectable concentrations of TPH-D, BTEX compounds, MtBE, DIPE, EtBE, TAME, or TBA in any soil samples analyzed during this assessment. Former Waste Oil Drum Storage Building The analyses of the soil samples collected from within the former waste oil drum storage building (B-1 through B-4) indicated TPH-MO was detected in 8 of the 12 soil samples collected and analyzed. Location B-1 showed the TPH-MO concentrations at the 5-foot bgs depth at 340 mg/kgs which decreased to 48 mg/kg at 15 feet bgs. At location B-2 (approximately 7 feet south of B-1), the TPH-MO concentration was relatively low (72 mg/kgs) at 1/2 foot bgs but increased markedly to 3,800 mg/kg at 5 feet bgs and then was non-detectable at 10 feet bgs. At location B-3 (approximately 10 feet southeast of 13-1), the highest concentration was noted at �/2 foot bgs with 4,300 mg/kg TPH-MO, decreasing to 92 mg/kg at 5 feet bgs and non-detectable at 10 feet bgs. Similarly, the highest concentration of TPH-MO seen in B-4 (located approximately 10 feet southeast of B-3) was observed at 1/2 foot bgs (520 mg/kg) followed by non- detectable concentrations at 5 and 10 feet bgs. 112884.1/ST010R366R Page 6 of 10 October 1, 2010 Copyright 2010 Kleinfelder Revision 1, dated November 22,2010