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# • maintenance shop in the oil change bay. The tank is located against the south wall out of the way from traffic. Waste oil is pumped pneumatically from the oil change service pit inside the shop through a series of transfer hosing into the storage tank. There were no signs of defective hoses, pumps or other ancillary equipment associated with the tank system. According to Terry Smith, Fleet Maintenance Shop Manager, Evergreen removes approximately 200 gallons of waste oil per month for recycling. There were no obvious weld cracks, seam cracks, scraps of protective coating or signs of corrosion associated with the tank noted during the on site visual observations of the tank. There were no apparent oil stains indicative of leaks or overfilling of the tank. The tank, secondary containment, piping, pumps or other ancillary equipment were considered to be in good condition, and the immediate area to the tank was neat and orderly. There were no cracks noted with the concrete pavement supporting the tank. Refer to Photograph Log, Attachment A. The secondary containment system does not have an automated leak detection system; however, the tank is visually inspected daily and the inspections are documented accordingly. There was no sight `fill' gauge installed on the primary tank. The tank was not secured to the floor or to the wall. There were no emergency contact names and phone numbers posted on or near the tank. The following summary describes the findings of the tank assessment regarding the required components of a Waste Tank Assessment Report: (1)Design Standards There were no design standards available for review at the time of the site visit to assess the tank. However, subsequently Terry Smith contacted Mosier Brothers and obtained design specifications and pressure testing results. Refer to Attachment B, Mosier Brothers correspondence(4/27/2009). (2)Hazardous Characteristics of Waste Oil The tank is used to store used oil, which is a hazardous waste that is considered flammable under certain conditions, and may contain metals. The steel tank and the secondary containment system are compatible with hazardous characteristics of waste oil and metals. (3)Existing Corrosion Protection Measures The interior of the carbon steel tank is compatible with waste oil. The exterior surface of the tank was coated with a corrosion resistant industrial paint. The tank is located within liau+rAota Waste Oil Tank Assessment Report 1 NES.Inc. Waste Management,Inc.—Stockton Scavenger Facility NES Project Number 289.EC743.00 Stockton,California