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24 March 2014 AGE Project No. 14-3034 Page 2 of 3 Once exposed, each tank was inspected to insure that residual fuel was not present. Prior to removal of the USTs, the tanks were triple rinsed by American Valley Waste Oil and L&B Environmental, using a pressure washer and alconox solution. Approximately 650 gallons of rinseate were extracted from the tanks with a vacuum truck and transported under manifest to DK-Dixon in Dixon, CA (State Manifest Document No. CAD983602251) by American Valley Waste Oil. Of Delhi, California (Attachment A). Dry ice was then applied to each UST. The lower explosive limit (LEL) and free oxygen was simultaneously measured to evaluate the risk of fire prior to UST handling and removal. The two tanks and associated piping were removed, transported and properly disposed of by Central Valley Demolition Company and Rake's Trucking of Modesto, California. The tank disposal receipt and Tank Closure Form are included in Attachment B. Soil removed from the piping excavation was placed on and covered with visqueen plastic and stockpiled on-site for future disposal. 2.1. SOIL SAMPLING On 11 March 2014, at the direction of an EHD representative, staff from AGE collected soil samples from the excavated stockpiles. On 12 March 2013, following the removal of backfilled UST soil, soil samples of native soil (silty clay) were collected at depth of 14.5 to 15 feet bsg. Soil samples were collected from the east, the center of tank and the west ends of the tank north tank (39-0181803) and south tank (39-0181804) (Figure 1). For soil samples collected from the excavation, the excavators bucket was used extract samples at depths of approximately 15 feet bsg. Once the bucket was at the surface staff from AGE collected samples from the bucket using a slide hammer and a two by six-inch steel sleeve; the slide hammer was also used to collect samples from the stockpiles. Upon collection, the end of each sample was covered with teflon tape and capped. Samples were then labeled with the sample location, date and time and were placed on ice until they were analyzed at CalTech Environmental Laboratory for the following constituents: Total petroleum hydrocarbons as gasoline (TPH-g) by EPA method 82608. Benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA method 82608. Advanced Ge Environmental,Inc.