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Tracy Mazda Waste Coil Tank 9 l Tank Assessment (2009) <br /> Leak Test: Tank is in service with no evidence of leaks. Secondary <br /> containment is dry. Tank wall thickness of 4.9 mm exceeds UL standard of <br /> 2.36 mm. <br /> Tracy Mazda <br /> Hydrostatic Calculation <br /> Waste Oil Tank <br /> Tank,Waste Oil Rectangular, Horizontal <br /> Material of Construction Steel <br /> Yield Strength, psi 36000.00 <br /> Design Tensile Strength, psi 33000.00 <br /> Depth of Oil 58.00 <br /> Area of wetted wall, ft2 28.20 <br /> S.G Contents 0.92 <br /> Average Pressure, Ib/ft2 138.74 <br /> Resultant Force, lbs 3912.36 <br /> Location of Resultant Force, from bottom, in 19.33 <br /> Moment, ftlbf of R 6303.24 <br /> Resisting Moment at top of tank, B 6303.24 <br /> Resisting Moment arm at B, ft 3.76 <br /> Resisting Force at B 1676.39 <br /> Resisting Force at bottom of tank at A, Ibf 2235.96 <br /> Area of tank bottom under tension, in2 11.77 <br /> Tensile stress at tank wall bottom corner, psi 190.01 <br /> Design Tensile Strength > Applied Tensile Strength <br /> Factor of Safety 173.68 <br /> Buckling <br /> b 71.00 <br /> d 34.00 <br /> b 1 70.60 <br /> d1 33.60 <br /> Ic 9375.85 <br /> F, lbs 4374.00 <br /> Moment Arm 32.00 <br /> Mp, in Ibf 139968.00 <br /> buckling stress, psi 253.79 <br /> design stress, psi 33000.00 <br /> design stress > applied stress, Tank will not buckle during quake <br /> Factor of Safety 1 130.03 <br /> Integrity testing findings: Based on the above noted integrity test and the <br /> results obtained from that test, the tank has sufficient integrity for its intended <br /> use. Initials: <br /> Strandberg Associates 1(866) 388-0404(650)329-8918 rwatergu a,rwater uguy.com 12 <br />