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Hazardous Waste Tank System June <br /> Written Assessment per CCR Title 22 <br /> Zoom Car Wash 3434 East Hammer Lane Stockton, CA 95212 2019 <br /> Ultrasonic Thickness Gauge Measurements <br /> UTG Measurement -Used Oil Tank <br /> Data Point Thickness Units <br /> 01 0.180 IN <br /> 02 0.200 IN <br /> 03 0.200 IN <br /> 04 0.240 IN <br /> 05 0.180 IN <br /> 06 0.190 IN <br /> 07 0.220 IN <br /> 08 0.220 IN <br /> 09 0.150 — IN <br /> 10 0.200 IN <br /> Average 0.198 IN <br /> Std. Dev. 0.025 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 59.40 <br /> Area of wetted wall, ft2 49.50 <br /> S.G Contents 0.95 <br /> Average Pressure, Ib/ft2 146.72 <br /> Resultant Force, Ibs 7262.54 <br /> Location of Resultant Force, from bottom, in 19.80 <br /> Moment, ftlbf of R 11983.19 <br /> Resisting Moment at top of tank, B 11983.19 <br /> Resisting Moment arm at B, ft 5.50 <br /> Resisting Force at B 2178.76 <br /> Resisting Force at bottom of tank at A 5083.78 <br /> Area of tank bottom under tension, in2 24.00 <br /> Tensile stress at tank wall bottom corner, psi 211.82 <br /> Effective Yield Strength >Applied Tensile Stress <br /> Factor of Safety 82.62 <br /> Strandberg Associates 1(866) 388-0404 rwaterquy(c)rwaterquy.com 11 <br />