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Hazardous Waste Tank System <br /> Written Assessment per CCR Title 22 February <br /> Jiffy Lube Store#3808, 3276 W. Grant Line Rd. <br /> Tracy, CA 95304 2019 <br /> Ultrasonic Thickness Gauge Measurements <br /> Ultrasonic Thickness - Used Oil Tank <br /> Data Point Thickness Units <br /> 01 0.142 IN <br /> 02 0.139 IN <br /> 03 0.140 IN <br /> 04 0.150 IN <br /> 05 0.143 IN <br /> 06 0.155 IN <br /> 07 0.140 IN <br /> 08 0.142 IN <br /> 09 0.143 IN <br /> 10 0.141 IN <br /> Average 0.144 IN <br /> Std. Dev. 0.005 IN <br /> Hydrostatic Calculation <br /> Hydrostatic Calculation - Used Oil Tank <br /> Rectangular <br /> Material of Construction Steel <br /> Yield Strength, psi 30000.00 <br /> Design Yield Strength, psi 25000.00 <br /> Weld Efficiency 0.70 <br /> Effective Yield Strength, psi 17500.00 <br /> Depth of Liquid, in 49.50 <br /> Area of wetted wall, ft2 39.88 <br /> S.G Contents 0.95 <br /> Average Pressure, Ib/ft2 122.27 <br /> Resultant Force, lbs 4875.32 <br /> Location of Resultant Force, from bottom, in 16.50 <br /> Moment, ftlbf of R 6703.56 <br /> Resisting Moment at top of tank, B 6703.56 <br /> Resisting Moment arm at B, ft 4.58 <br /> Resisting Force at B 1462.60 <br /> Resisting Force at bottom of tank at A 3412.72 <br /> Area of tank bottom under tension, in2 16.24 <br /> Tensile stress at tank wall bottom corner, psi 210.14 <br /> Effective Yield Strength > Applied Tensile Stress <br /> Factor of Safety 83.28 <br /> Strandberg Associates 1(866) 388-0404 12 <br />