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Project No. S8100-06-30- September 15, 1995 Page 2 1 Soil samples were obtained beneath the product piping at the elbow (Piping #1), beneath the unleaded fuel dispenser (Piping #2), and beneath the diesel dispenser (Piping #3) at depths that ranged from approximately 1.2 to 1.4 meters (4 to 4.5 feet) below ground surface (bgs). The piping samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), diesel (TPHd), motor oil (TPHmo), kerosene (TPHk), and benzene, toluene, ethylbenzene and total xylenes (BTEX). The results of laboratory tests indicated nondetected concentrations of the target compounds with the exception of 92 mg/kg TPHk detecied in soil sample Piping #3 which was collected at a depth of L2 meters (4 feet) bgs, beneath the diesel dispenser. Groundwater was not encountered within the UST and piping excavations. The excavations were subsequently backfilled and repaved with asphalt concrete. SCOPE OF SERVICES Outlined below is a summary of the scope of services performed by Geocon under Task Order 10-5F 1000-12. e Conducted a Prework Site Visit on Jul 13, 1995, attended b Mr. Saiyed Ali and Mr. Y Y Japtej Gill of Caltrans and Mr. John Juhrend of Geocon, to perform a preliminary survey ! of the work area and to mark the proposed boring locations. The Prework Site Visit Checklist and Completion Schedule were subsequently discussed and signed by.Mr.,John Juhrend and Mr. Japtej Gill. * Obtained a well permit from the SJCEHD. A copy of the permit is attached as Appendix A. © Contacted Underground Service Alert (USA Ticket No. 153557) on July 27, 1995, to a advise subscribing utility companies of the soil boring activities. o Prepared a site specific Health and Safety plan dated July 25, 1995, to provide guidelines on the use of personal protective equipment (PPE) and the health and safety procedures to be implemented during the field activities. D Retained a subcontractor,Western Strata Exploration, to drill eight exploratory soil borings (SBI through S138) to a maximum depth of 14.0 meters (46 feet) bgs utilizing a truck- mounted drill rig equipped with 203.2-mm (eight-inch) diameter hollow stem augers. G Submitted forty-five soil samples to Sparger Technology Incorporated (Sparger) for C chemical analysis following chain-of-custody protocol.