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Also in March 2000, two borings, B-10 and B-11, were advanced to investigate areas of potential envirorunental impact east of the CSMS building Bonng B-10 was located at a former hazardous materials stoiage shed A trace concentration of hydraulic oil-weight petroleum hydiocatbon was detected at a depth of ten feet bgs, no other COCl, including VOCs in soil vapor, were detected Boring B-11 was ad-vanced where sand blasting activities may have resulted in a heavy metals impact to the subsurface The CVRVIQCB recorninended that shallower samples be collected in these areas to complete their assessment 1.13 01.15 I Environmental issues at the following locations at this facility were identified and initially investigated by Versai in March 2000 1 14 Fuehng Area One 5,000-gallon diesel UST, one 10,000-gallon gasoline UST, and a dispenser island with two dispensers were used for OMS operations vehicle fueling The USTs were removed in April 1996 (Sew and Schreder Construction, 1996) Releases of diesel fuel and gasoline appear to have occuixed from the two UST, although benzene and toluene were not detected in soil samples collected at the tune of UST removal The highest concentrations of TPH-d and TPH as gasoline (TPH-g) detected in soil were 12.000 mg/kg and 7,100 mg/k-, respectively The highest concentrations of the worriatic hydiocarbons ethylbenzene and total xylene isorneis, detected in • soil ci ere 62 ma/kc, and 580 mg/kg, iespectn ely No MTBE was detected in soil samples collected fioni the Site The highest lead concentiation detected in soil 'was 10 mg/kg Veisai advanced two borings in Maich 2000 at the former location of the two USTs The borings were advanced to 25 feet in depth and sampled at 10, 15 and 20 feet bgs for petroleum hydrocarbons as gasoline and diesel fuel TPH-g and TPH-d were detected in each boring at a depth of 25 feet One boring contained soil concentrations of TPH-g and TPH-d of 25 4 mg/kg and 209 mg/kg, respectively The second boring contained soil concentrations of TPH-g and TPH-d of 5 9 mg/kg and 8 13 mg/kg. respectively 1.15 Vehicle Inspection Rack Versai detected petroleum. hydrocarbons 1n March 2000 in shallow soil in the area of the vehicle inspection rack Jet fuel-weight petroleum hydrocarbons were detected at a concentration of 10 500 mg/kg at the south end of the vehicle inspection rack The release appeals to n-rapact soil to depths greater than 10 feet bgs and inay. therefore, present a potential impact to groundwater 011-weight petroleum hydrocarbons were also detected in soil at this location at a concentration of 153 mg/kg TPH-g and TPH-d were detected at concentrations of 9 24 mg/kg and 14 2 ing/kg respectively Volatile oigatnc compounds (VOCs) were not detected in soil Napor 104700 4766 230/08s1=PT2004 J