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Hazardous Waste Tank System September <br /> Final Written Assessment per CCR Title 22 2012 <br /> Pro Lube,808 S Cherokee Lane,Lodi,CA 95240 <br /> Tank Wall Ultrasonic Thickness Measurements. <br /> ULTRASONIC THICKNESS DATA <br /> TANK: Used Oil Tank <br /> Reading Thickness Inches <br /> 1 0.144 <br /> 2 0.134 <br /> 3 0.139 <br /> 4 0.139 <br /> 5 0.135 <br /> 6 0.144 <br /> 7 0.138 <br /> 8 0.139 <br /> 9 0.138 <br /> 10 0.138 <br /> Average 0.139 <br /> Std Dev 0.003 <br /> Hydrostatic Strength Calculation <br /> Tank, Used Oil <br /> Rectangular <br /> Material of Construction Steel <br /> Yield Strength, psi 30000.00 <br /> Design Yield Strength, psi 25000.00 <br /> Weld Efficient 0.70 <br /> Effective Yield Strength, psi 17500.00 <br /> Depth of Liquid, in 44.10 <br /> Area of wetted wall, ft2 33.08 <br /> S.G Contents 0.95 <br /> Average Pressure, Ib/ft2 108.93 <br /> Resultant Force lbs 3602.76 <br /> Location of Resultant Force from bottom, in 14.70 <br /> Moment, ftlbf of R 4413.38 <br /> Resisting Moment at top of tank, B 4413.38 <br /> ResistingMoment arm at B, ft 4.08 <br /> ResistingForce at B 1080.83 <br /> ResistingForce at bottom of tank aE <br /> 2521.93 <br /> Area of tank bottom under tension, 14.98 <br /> Tensile stress at tank wall bottom cE 168.35 <br /> Effective Yield Strength > Applied Tensile Stress <br /> Factor of Safety 103.95 <br /> Strandberg Associates 1(886? 388-0404 rva°erauH'n'r:raterquv,co:_ 10 <br />