ARCHIVED REPORTS_XR0003001 - Laserfiche WebLink

Home Browse Search

2.2 _. on July 20, , 1990, Semen removed one 2,000 gallon underground gasoline storage tank and one 1,000 gallon underground waste oil. tank from the above described property. soil samples were collected beneath the east and west ends of both tanks. The samples from beneath the gasoline tank were analyzed for total petroleum hydrocarbons as gasoline (TPH) and for benzene, toluene, ethylbenzene and total xylenes (BTEX). TPH was detected at 260 parts per million (ppm) beneath the east end and 12 ppm beneath the' west end. Benzene was detected at 0.2 ppm beneath the east end and at 0.1 pps' beneath the west end. Concentrations of gasoline and benzene were in excess of state and county guidelines. The soil samples that were collected from beneath the este of tank were analyzed for TPH as gasoline, diesel, kerosene, an mo or oil, for STEX, for total lead, for the CAN 17 metals, for volatile 4;jV organic halogens (VOH) , and for PCB's. TPH as motor oil was i detected at 3,600 pps beneath the west end of the tank, BTEX constituents were detected at low concentrations below the west end, lead was not detected, and the CAN 17 metals were detected at ations below the Total Threshold Limit Concentrations v (TFCC of the volatile organic halogens, PCE was detected at 0.16 neath the west and of the tank. Ko PCB's were..detected. Given the concentrations of motor oil and PCE, additional site i characterization was warranted. Zamora/Wondries Group, contracted with Aqua Geosciences, Inc. to prepare a workplan, implement this site characterization study, and prepare this report of findings. f Activitim '-' 3.0 AnuMDAUMMto Field Activities for this phase included advancing six borings on April 2 and April 3, 1991 to assess the lateral and vertical extent of soil impaction. Soil boring TH-2 was advanced through the east end of the former location of the gasoline tank to a depth of 20 feet to assess the vertical limits of impacted soil. Borings TH-1, _. and TH-3, were drilled to enable assessment of the lateral extent of impacted soil in the product tank area. Boring TH-4 was advanced to a depth of 25 feet, through the west end of the former -- location of the waste oil tank to assess the vertical limit of soil impacted by waste-oil and boring TH-5 and TH-6 were advanced to assess the lateral extent (Exhibit 2). i Boring TH-1 was drilled through the western end of the former gasoline tank cavity and TH-3 was drilled approximately seven feet northeast of TH-2. Borings TH-5 and TH-6 were advanced approximately five and ten feet from TH-4 (Exhibit 2) . W r.awyou.rbc " 2 y •