COMPLIANCE INFO_2010 - 2011 - Laserfiche WebLink

Home Browse Search

P4ge 2 of 3 May 13, 2010 Chevron Service Station 30-7709 20,000 gallon UST containing diesel fuel and supreme gasoline, six fuel dispensers and associated product lines. Main features of the site are shown on Figure 2. Soil Sampling Activities WPI personnel collected six soil samples from beneath the product dispensers on May 4, 2010 during dispenser upgrade activities. The samples were obtained from a depth of approximately four feet. Sampling locations are shown on Figure 2. Work was performed at the direction of Inspector Garret Backus of the San Joaquin Environmental Health Department (SJEHD). A copy of the SJEHD permit is in Attachment A. Soil samples obtained from beneath the dispensers were collected using a hand auger. All samples were packed into stainless steel tubes. The tube ends were covered with Teflon sheets and sealed with plastic end caps. Samples were labeled, recorded on a chain -of -custody document, and placed in cold storage until analyzed by a state -certified laboratory. All sampling equipment was washed with an approved non -phosphate detergent and water, double -rinsed, and air dried prior to the collection of soil samples at each location. Soil sampling activities and report generation were conducted under the supervision of a California Professional Geologist. Analytical Test Methods Soil samples were delivered to Kiff Aanlytical in Davis, California, and analyzed for total petroleum hydrocarbons as gasoline (TPH-G) using EPA Method 8015M and for benzene, toluene, ethylbenzene and xylenes (BTEX), and oxygenated compounds using EPA Method 8260B. Additionally, samples D-3 and D-5 were analyzed for TPH-D (diesel fuel) using EPA Method 8015M. Analytical Results TPH-G, TPH-D. BTEX and oxygenated compounds were not detected in any of the soil samples collected. Analytical results are in Table 1 and shown on Figure 2. A copy of the laboratory report and chain -of -custody documentation is provided in Attachment B. Conclusions and Recommendations Based on analytical results obtained by this investigation, it is concluded that petroleum fuel hydrocarbons have not impacted soil beneath the product dispensers and therefore no further actions are recommended.