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Hazardous Waste Tank System <br />Written Assessment per CCR Title 22 <br />Interstate Truck Center, 2110 S Sinclair Ave. Stockton, CA 95215 <br />June <br />2019 <br /> <br /> <br />Strandberg Associates 1(866) 388-0404 rwaterguy@rwaterguy.com 13 <br /> <br />Ultrasonic Thickness Gauge Measurements <br /> <br /> <br />Ultrasonic Thickness <br />Used Oil Tank <br />Data Point Thickness Units <br />01 0.134 IN <br />02 0.137 IN <br />03 0.140 IN <br />04 0.124 IN <br />05 0.126 IN <br />06 0.127 IN <br />07 0.127 IN <br />08 0.125 IN <br />09 0.126 IN <br />10 0.125 IN <br />average 0.129 IN <br />std. dev. 0.006 IN <br /> <br /> <br />Hydrostatic Calculation <br /> <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 40.22 <br />S.G Contents 0.95 <br />Average Pressure, lb/ft2 122.27 <br />Resultant Force, lbs 4917.35 <br />Location of Resultant Force, from bottom, in 16.50 <br />Moment, ftlbf of R 6761.35 <br />Resisting Moment at top of tank, B 6761.35 <br />Resisting Moment arm at B, ft 4.58 <br />Resisting Force at B 1475.20 <br />Resisting Force at bottom of tank at A 3442.14 <br />Area of tank bottom under tension, in2 15.21 <br />Tensile stress at tank wall bottom corner, psi 226.31 <br />Effective Yield Strength > Applied Tensile Stress <br />Factor of Safety 77.33 <br /> <br />