WORK PLANS - Laserfiche WebLink

Home Browse Search

Site Background Information: Vanco Truck&Auto PlaEa Page 2 of 6 disposal.During the excavation,soil samples were collec ed by an AGE representative from the floor of the piping excavation, the fuel dispenser excavation and the soil stockpiles for analysis. The laboratory analysis reported total petroleum hydrocarboin s quantified as gasoline and diesel(TPH-g and TPH-d,respectively),benzene,toluene,ethylbenzene,and xylenes(BTEX),and the fuel additive methyl tertiary-butyl ether(MTBE) from the areas of the former piping and fuel dispensers. PREVIOUS SITE ASSESSMENTS On 30 and 31 October 2003,seven soil probe borings(I i though B7)were advanced at the site.A total of 19 soil samples from the seven soil borings N rere analyzed for petroleum hydrocarbon products. TPH-g and TPH-d were detected in soil samp es collected from boring B3 at 10 feet bsg (B3-10)and 15 feet bsg(B3-15)and boring B7 at 30 fee bsg(B7-30),at maximum concentrations in sample B3-15 of 47 milligrams per kilogram(mg/kg)TPH-g and 110 mg/kg TPH-d.Laboratory chromatograms show that the TPH-g concentrations were detected within the diesel-range spectrum, indicating that the TPH-g may actually be degraded diesel fuel. MTBE and xylenes were detected in soil sample B3-15 at concentrations of 0.045 mg/kg and 0.10 mg/kg,respectively. Grab ground water samples collected from six of the seven soil borings were analyzed for petroleum hydrocarbon products. TPH-g and TPH-d were detected in ground water samples collected from borings B2 and B4,at maximum concentrations in boring B4 of 190,000 micrograms per liter(µg/1) TPH-g and 2,200,000µg/1 TPH-d. Laboratory chromato prams show that the TPH-g concentrations were detected within the diesel-range spectrum,indicatin g that the TPH-g may actually be degraded diesel fuel. MTBE was detected in ground water samples collected from boring B5 at a maximum concentration of 15 µg/l. No other target analytes were detected at or above laboratory detection limits in any other of the samples analyzed. On 26 and 27 July 2004, three pilot soil borings were: advanced to 35 feet bsg at the site and completed as groundwater monitoring wells MW-1 throe MW-3.No constituents ofconcern were detected at or above laboratory detection limits in the so it samples analyzed. On 05 August 2004, one cone penetration test (CPT) boring (CPT-1) paired with a hydropunch boring was advanced to 100 feet bsg on-site; lithologic data was collected from the initial boring utilizing CPT technology, and soil and grab ground water samples from selected depths were collected from an immediately adjacent twin boring.Two soil samples were collected from CPT-1. In the soil sample collected at 60 feet bsg(CPT 1-60),TP H-g,ethylbenzene,and total xylenes were detected at concentrations of 2.1 mg/kg, 0.008 mg/kg and 0.017 mg/kg, respectively. In the soil sample collected at 90 feet bsg(CPT1-90), TPH-g, TP -d, ethylbenzene, and total xylenes were detected at concentrations of 6.3 mg/kg, 110 mg/kg,0.0 17 mg/kg,and 0.037.mg/kg, respectively. A total of three grab ground water samples were collected from soil boring CPT-1.No constituents of concern were detected at or above laboratory detection limits in the grab ground water samples Advanced GeoEnvlronnwntal,Inc.