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Hazardous Waste Tank System <br />Written Assessment per CCR Title 22 <br />Valley Quick Lube, Tracy <br />October <br />2018 <br /> <br />Strandberg Associates 1(866) 388-0404 rwaterguy@rwaterguy.com 14 <br />Tank Integrity: The tank is a double walled tank without signs of damage or <br />leaks. <br /> <br />UTG Thickness - Used Oil Tank <br />Data Point Thickness Inches <br />01 0.147 IN <br />02 0.149 IN <br />04 0.150 IN <br />05 0.151 IN <br />06 0.150 IN <br />07 0.150 IN <br />08 0.146 IN <br />09 0.147 IN <br />10 0.149 IN <br />average 0.149 IN <br />std. dev. 0.002 IN <br /> <br /> <br />Hydrostatic Calculation <br /> <br />Hydrostatic Calculation- Used Oil <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 56.70 <br />Area of wetted wall, ft2 23.63 <br />S.G Contents 0.95 <br />Average Pressure, lb/ft2 140.05 <br />Resultant Force, lbs 3308.66 <br />Location of Resultant Force, from bottom, in 18.90 <br />Moment, ftlbf of R 5211.14 <br />Resisting Moment at top of tank, B 5211.14 <br />Resisting Moment arm at B, ft 5.25 <br />Resisting Force at B 992.60 <br />Resisting Force at bottom of tank at A 2316.06 <br />Area of tank bottom under tension, in2 8.40 <br />Tensile stress at tank wall bottom corner, psi 275.72 <br />Effective Yield Strength > Applied Tensile Stress <br />Factor of Safety 63.47 <br />