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plunger operated on the rear top of the Baker Box, which connects to the interior of the overfill bucket thru which spilled or line residual fuel can be returned to the tank. The Baker Box had approximately '/ in. of product in the bottom. The manual return plunger was operated, determined to be in good working condition and suitable for continued use. There is substantial corrosion on all parts of the Backer Box system, which should be part of the preventative maintenance operations. Owner/Operator has been advised that the Baker Box should regularly be checked to avoid standing fuel in the containment and that both the Baker Box and the return plunger device should be addressed for corrosion and operating issues. Also, at the time of the inspection, the overfill/fill location was unlocked and easily opened. This fill location should be padlocked when not in use, although the entire yard is secured. Vents: The Modem Welding Fireguard ASTs each have a 2 inch atmospheric vent which are in operating condition and are unobstructed. The atmospheric vents go thm the roof area and terminate approximately 8ft. above the top of the tanks, which precludes atmospheric flammable congregating at the tops of the tanks and creating an explosive or combustible condition. Each of the Modern Welding Fireguard 25,000 gallon tanks has an 8 inch emergency vent for the primary vessel, and also an 8 inch emergency vent for the secondary containment area of the tank. The vents are Morrison Bros. vents, and are located next to each other and also next to the bolted 28 inch man way. The emergency vents, each actuate at 2 Y, psi. All emergency vents were inspectedand tested and found to be in good working condition. The Morrison Bros emergency vents are sized to the volume of the AST for each AST. The atmospheric vents on the 2 inch pipe risers did not appear to have any obstructions to the outflow of vapors and are suitable for continued use. Bonding/Grounding: All electrical conduits and electrical equipment in the Class I Division I areas appear to be explosion proof or intrinsically safe with no defects. Corrosion Control Systems (Cathodic Protection) The tanks are all elevated and do not require cathodic protection. Off load piping does not routinely contain product and therefore does not require cathodic protection. There are no Sections of this piping that lay on the secondary containment floor and while there is minimal evidence of corrosion there are no serious signs of corrosion requiring remedial action.