WORK PLANS - Laserfiche WebLink

Home Browse Search

I Site Background Information: Vanco Truck&Auto laza Page 2of6 Construction Company; excavated .soil was stoc piled.-on-site for .evaluation prior to transport-to Forward Landfill for-disposal. DurinQ the excavation, soil samples were collected by an AGE representative from the fl' r of the piping excavation; the fuel dispenserexcavation,and the soil stockpiles for ana ysis..The laboratory analysis reported total petroleum hydrocarbons quantified as gasoline and diesel (TPH-gr 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. i PREVIOUS SITE ASSESSMENTS On 30 and,31 October 2003, seven soil probe borings (131 though 87)were advanced at the site.A total of 19�soil samples from the seven so('borings were analyzed for-petroleum hydrocarbon-products. TPH-g-and TPH-d-were detected in soil samples collected from boring B3 atl0 feet bsg(B3-10)and-15 feet bsg(B -1'5)and bonng:B7 at 30 feet bsg.(137- 30); at maximum concentrations in sample 83=1`5 1.47 milligrams,per kilogram (mg/kg) TPH-g, and-=110 mg/kg TPH ,, Laboratory ch �matograms show that; the- TPH-g concentrations were-detected within the diesel-ran a spectrum, indicating that the TPH-g may actually be degraded diesel fuel.MTBE and xy rtes were detected in soil sample 133- 15 at concentrations of,0.045 mg/kg and 0.10 mg/kg, respectively. Grab ground water samples collected from six of th 3 seven soil borings were analyzed for petroleum hydrocarbon products. TPH-g:and T -H=d were detected,in ground,water samples.collected from borings B2 and-134,-at-ma(imum concentrations in boring B4°of 190,000 micrograms per liter (pg/I) TPH-g ,an .2,200,000 pg/I TPH-d. Laboratory chromatograms show that'the TPH-g concentration were detected within the diesel-range spectrum, indicating that,the TPHag may actually-be-degraded diesel fuel. MTBE was detected in ground.water-samples collected-from boring 85 at a maximum concentration of 15 pg/l.•No other target analytes were detected ati 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 ground water monitoring wells MIN-1-through MW-3. No constituents of- concern were detected at or above laboratory detection limits in the soil 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, andsoil and-,grab groundwater samples from selected depths were collected from an immediately adjacenttwin'boring.Two soil samples were collected from CPT-1. In the soil sample collected at 60 feet bsg (CPT-1-60),TPH-g, ethylbenzene,and total xylenes were detected at-co ncentrations of-2.1'mglkg;0.008,mg/kg and 0.017 mg/kg,respectively. In the soil sample collected at 90 feet bsg(CPT1-90),TPH- g, TPH-d, ethylbenzene, and total xylenes were detected at concentrations of 6.3 mg/kg; Advanced GeoEnvironntental,Inc.