CO0020059 - Laserfiche WebLink

Home Browse Search

Y C Mr.Bob Gondek A M B R I A March 11, 2004 removed the oil with vacuum trucks. As soon as it was safe and feasible,Foss and MP vacuumed oil directly from the rupture, instead of via the trench and pit. Wet and muddy surface conditions impeded access by wheeled vehicles, so CPL pulled the vacuum trucks across the field and to the release site with a bulldozer. Between December 4 and 5, 2003, approximately 400 bbl (16,800 gallons) of free flowing crude oil were recovered via the receiving pit, directly from the pipeline puncture, and from puddles of standing oil surrounding the puncture. Recovered crude oil was returned to Chevron's Kettleman facility. Copies of the bills of lading are included as Attachment B. Each truckload was estimated to contain 100 bbl of oil. © Removal of Standing Oil. On December 5, 2003, Cambria directed the removal of standing oil in the locations shown on Figure 2. Standing oil was removed by excavating the puddles and loading the oil-saturated soil into trucks for offsite disposal. As necessary, adjacent and less oil- saturated soil was utilized to contain free oil. Photographs 5 through 7 show standing oil prior to excavation. Approximately 158 cubic yards of soil were removed and disposed of at Altamont Landfill.Landfill weight tags are included as Attachment C. Based on the sizes of the oil puddles, Cambria estimates that several hundred gallons of oil were removed through this process. Preliminary Assessment The native surface soil was brown in color, and contrasted with the dark brown to black color of oil-impacted soil (Photograph 9). The color differences allowed for visual identification of oil- impacted soils. To delineate the crude oil impact, Cambria: 1) mapped the lateral extent of crude oil in surface soils; 2) excavated test pits in areas where vertical migration was suspected; and 3) sampled soil beneath the KLM pipeline. Cambria Project Geologist Albert Simmons performed all field mapping and sampling,and directed test pit excavation. Lateral Extent of Crude Oil. On December 5, 2003, Cambria mapped the surface extent of crude oil impact and collected sample CEX-0.5' from apparently oil-saturated soil. Figure 2 shows the approximate lateral extent of crude oil impact. Cambria analyzed sample CEX-0.5' for total petroleum hydrocarbons (TPH) in the gasoline range (C4-C12),TPH as diesel (CIO-C23), TPH as motor oil (Cls+),and TPH as bunker oil (CIO+)by EPA Method 8015M, and for benzene,toluene, ethylbenzene, xylenes (BTEX) by EPA Method 8021. The analytical laboratory reported 620 mg/kg TPH (C4- C12), 1,700 mg/kg TPH(CIO- C73), 1,800 mg/kg TPH (Cis+), and 2,800 mg/kg TPH (CIO+), and 0.44 mg/kg benzene. Soil sample results are summarized in Table 1 and the analytical laboratory reports are included as Attachment D. Vertical Extent Assessment. On December 5, 2003, Cambria investigated soils in the northeast portion of the impact area (Figure 2) to 6 ft bgs using a push rod. To further characterize the vertical extent of crude oil,Cambria excavated test pits in the locations shown on Figure 2. Crude oil had vertically infiltrated to between 5 and 9 ft bgs in the test pit locations. Vertical migration 4