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1 <br /> Hazardous Waste Tank System October <br /> Final Assessment per CCR Title 22 <br /> Premier Hyundai of Tracy, 3480 Naglee Dr. Tracy, CA 95304 2014 <br /> Tank Integrity: The tank has been in service for 24 years and shows no <br /> evidence of leakage. The tank is built to the UL 142 standard but not listed. <br /> Ultrasonic Thickness Gauge Measurements <br /> Waste Oil Tank <br /> UTG Measurement <br /> Data point ID Thickness Units <br /> 01 0.150 IN <br /> 02 0.110 IN <br /> 03 0.110 IN <br /> 04 0.120 IN <br /> 05 0.120 IN <br /> 06 0.110 IN <br /> 07 0.110 IN <br /> 08 0.110 IN <br /> 09 0.130 IN <br /> Average 0.119 IN <br /> Standard Deviation 0.014 IN <br /> Hydrostatic Calculation <br /> i <br /> Tank, Waste Oil Tank <br /> Rectangular <br /> Material of Construction Steel <br /> Yield Strength, psi 30000.00 <br /> I <br /> Design Yield Strength, psi 25000.00 <br /> Weld Efficiency 0.70 <br /> Effective Yield Strength, psi 17500.00 <br /> f <br /> Depth of Liquid, in 36.90 <br /> 1 Area of wetted wall, ft2 18.71 <br /> S.G Contents 0.95 <br /> Average Pressure, Iblft2 91.14 <br /> Resultant Force, lbs 1704.94 <br /> Location of Resultant Force, from bottom, in 12.30 <br /> Moment, ftlbf of R 1747.57 <br /> Resisting Moment at top of tank, B 1747.57 <br /> Resisting Moment arm at B, ft 3.42 <br /> Resisting Force at B 511.48 <br /> Resisting Force at bottom of tank at A 1193.46 <br /> Area of tank bottom under tension, in2 8.76 <br /> Tensile stress at tank wall bottom corner, psi 136.24 <br /> Effective Yield Strength >Applied Tensile Stress <br /> Factor of Safety 128.45 <br /> Strandberg Associates 1(866) 388-0404 rwaterguy0ywaterguy com 13 <br /> I <br />