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0 0 <br />09 March 1999 <br />AGE -NC Project No. 98-0513 <br />Page 2 of 3 <br />Prior to removal of the USTs, the tanks were triple rinsed by AGE, using a pressure washer and <br />an alconox solution. The liquid contents of the USTs were removed. Approximately 250 gallons <br />of rinseate were transported under manifest to Industrial Services Oil Company in Los Angles, <br />California (State Manifest Document No. 98891618) by Norcal Oil of Turlock, California. <br />An inspector from the City of Stockton Fire Department was on site to oversee the tank removal <br />activities. After being removed, the tanks were visually inspected and appeared to be intact, with <br />no holes or extensive corrosion noted. <br />Due to limitations of the excavator used to excavate the USTs, a mobile crane was used to lift the <br />USTs onto waiting transportation vehicles to be delivered for treatment and disposal. The tanks <br />were subsequently transported to West Coast Equipment Company of Turlock for disposal. <br />Soil removed to uncover the tank was replaced and compacted back into the UST excavation. <br />Pea gravel was used to backfill the remaining portion of the UST excavation. <br />SOIL SAMPLING <br />Following removal of the tanks, an excavator was used to collect soil samples from 2 feet below <br />the ends of the former USTs (Figure 2). A total of four soil samples were collected from the base <br />of the USTs. Three soil samples were collected from the soil stockpile. One soil sample was <br />collected from the former dispenser area. Each soil sample was collected with a metric soil <br />sampling hammer, loaded with a pre -cleaned brass sleeve. The ends of the soil -filled brass <br />sleeves were sealed with a Teflon plastic and plastic end caps were tapped over the ends of each <br />sample sleeve. <br />Samples were collected by Precision Enviro-Tech (PET) of Stockton, a State of California <br />Department of Health Services (DHS) -certified laboratory. The samples were labeled and placed <br />in a chilled container. The samples were transported under chain -of -custody to PET. The date <br />and time the soil samples were collected were noted on the chain -of -custody form included with <br />the attached laboratory report and quality control data. <br />The soil samples were analyzed for: <br />• Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in <br />accordance with EPA Method 8015 Modified, <br />Advanced GeoEnvironmental, Inc. <br />