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• Appendix A: Site Background Information Page 3 of 3 dispensers and associated product lines, within excavation Area A, were removed. Several utility lines supplying the dispensers and an electronic card reading machine located in the center island, could not be removed, and had to be left in place during the excavation. The excavation was performed by Elite IV of Stockton, California, under the supervision and direction of an AGE representative. Excavated soil was stockpiled on plastic sheeting and later transported to a licensed Class II disposal facility, for proper disposal. A total of eight soil samples were collected from the floor and sidewalls of excavation Area B, and sixteen soil samples were collected from the floor and sidewalls of excavation Area A: • TPH-d was reported in seven of the soil samples collected from excavation area B at concentrations ranging between 12 mg/kg and 13,000 mg/kg. • TPH-d were reported in four of the ten soil samples analyzed from excavation Area A at concentrations ranging between 86 mg/kg and 3,300 mg/kg. • One or more BTEX compounds were reported in five of the soil samples collected from excavation Area B at maximum concentrations of 0.28 mg/kg, 0.15 mg/kg, 1.0 mg/kg and 8.8 mg/kg. • BTEX compounds were not reported in any of the soil samples analyzed from excavation Area A. • TPH-d, ethylbenzene and xylenes were reported in the stockpile sample at concentrations of 3,600 mg/kg, 0.02 mg/kg and 0.176 mg/kg, respectively. The mass of petroleum hydrocarbons removed during soil excavation activity was estimated based upon the analytical results of the 4-point composite stockpile sample and from borings advanced during previous site assessment activities. An estimated 1,371 pounds or 220 gallons of diesel were removed from the site. Analytical results of excavation soil samples are summarized in Table A3. Field procedures,sample results and mass and volume calculations are outlined in the AGE-prepared Soil Excavation Report, dated 31 August 2010. Advanced GeoEnvironmenta4 Inc.