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' Libbey Owens Ford Co. <br /> Site Investigation <br /> August 23, 1996 <br /> ' Page-4- <br /> 2.4 Diesel Product Removal <br /> On August 2, 1996, Condor and Oil Equipment Service of San Andreas, California installed a <br /> ' one (1) inch, air powered, diaphragm pump and product recovery piping at the site. An oiless air <br /> compressor, provided by LOF, was used to power the diaphragm pump. Diesel product was measured. <br /> ' at the bottom of the excavation from 9 feet to 10.5 feet bgs. The excavation had slumped slightly . <br /> since the initial soil removal during the previous week. The pump intake pipe was placed within the <br /> ' excavation to a depth of approximately 10 feet bgs. The discharge piping was routed to a portable <br /> 800-gallon steel tank. Pumping commenced at a rate of approximately eight (8) gallons per minute <br /> and continued for approximately one (1) hour. Pumping was terminated when the product level <br /> dropped below the intake pipe. Approximately 520 gallons of diesel were pumped during the initial <br /> product removal. On August 8, 1996, Evergreen, Inc. of Newark, California, pumped the product <br /> from the tank, including an additional 225-gallons directly from the excavation, and transported the <br /> diesel product to their facility in Newark for recycling. Periodic pumping of the excavation has been <br /> ' conducted since the initial product recovery. To date, 1850 gallons of product have been pumped and <br /> removed from the site. Evergreen will continue to transport the pumped product to Newark until the <br /> ' product is no longer recoverable. <br /> ' 3.0 CONCLUSIONS <br /> Based on the field observations and laboratory analyses an unquantified'volume of diesel fuel <br /> ' has been released in the vicinity of the underground product piping. The product piping is no longer <br /> in service. The soil beneath the piping has been impacted by diesel fuel from approximately 1 foot <br /> ' bgs down to.the water table at approximately 13 feet bgs. Soil concentrations indicate that the lighter <br /> and more mobile fractions of the diesel fuel (i.e., BTEX) have migrated downward ahead of the main- <br /> plume. Free phase, floating diesel product was observed within the excavation. The diesel fuel has <br /> been dyed red for off-highway use and is easily distinguished. A Material Safety Data Sheet (MSDS) <br /> ' for a red dye typically used for this application reported the dye to be non-water soluble. The <br /> ' `+ CONDOR <br />