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% 10 Swift Transportation Page 2 Aboveground Tank Inspection TES # 21097.001 Neither of the tank sections have a normal vent. Each tank section should have a 2" diameter pipe extending upward with a normal vent on top at a minimum of 12' above grade. The normal vent allows air to enter or vent from the tank during filling or removal of liquids to prevent excessive pressure or vacuum which could cause damage and/or failure of the tank. There are three emergency vents on the tank, a 6" diameter vent on each tank section and an 8" diameter vent for the secondary space. All three vents are Morrison Brothers 8 oz Figure 244. According to the Morrison Venting Guide, the Figure 244, 6" diameter 8 oz emergency vent has a venting capacity of 246,130 CFH @ 2.5 psi which exceeds the requirement of 154,350 CFH for a 1,500 gallon tank. The tag on the tank states that the secondary space requires an emergency venting capacity of 249,600 CFH. The 8" vent installed on the secondary space has a venting capacity of 462,000 CFH which exceeds the minimum venting capacity required. The capacity of the emergency vents is acceptable, and a visual inspection and manual operation indicate they are operating properly. The float level gauge on the waste oil tank was verified with a tape when the manhole cover was off. The liquid level in the tank was measured at 1'-4" which indicates the gauge is reasonable accurate. The gauge on the new oil tank also appeared to be working properly. The liquid level gauge located in a two inch diameter pipe at the east end of the tank for checking the secondary containment, or annular space, was broken and should be replaced. The bottom of the tank in the annular space was checked for water or other liquid using a steel weight with water finding paste. No liquids were found in the bottom of the annular space. Also while the manhole cover was off the waste oil section of the tank, the bottom of the tank was checked for water in the bottom of the tank, also using water finding paste. No water was noted in the tank. There is no external piping for the tank as the normal use is through rubber hoses between the top of the tank and a pneumatic pump on top of the tank for the new oil, and a pump from inside the building for pumping the waste oil into the tank. The tank is grounded to the adjacent building. The size of the screw in the building may be an issue, but will be addressed in the report from Mr. Michael Jundt. Once the tank is brought up to code, and per the requirements of STI SP001 Table 5.5 your designated inspector is required to provide periodic inspections of the tank. Section 4.1 states that the inspector shall be knowledgeable of the tank, its operations, associated components, and the characteristics of the liquid stored. Attached is a copy of a suggested Monthly Inspection Checklist. You may use this checklist, or use it as guide to create your own inspection checklist. This report addresses the inspection requirements of STI SP001, however it may not address all requirements pertaining to above ground tank operation, inspection and registration as required by the Certified Unified Program Agency (CUPA). Further inspections or tests may be required in the future as requested by the CUPA, or as required by your Spill Prevention Control and Countermeasures (SPCC) Plan. The federal, state and county codes and requirements should