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Hazardous Waste Tank System September <br /> Written Assessment per CCR Title 22 p <br /> Tracy Mazda, 2680 Auto Plaza Way,Tracy, CA 95304 2018 <br /> Tank Integrity: The tank is a single walled tank in service for 9 years. The <br /> inspection of the tank found it free of leaks and damage. <br /> Ultrasonic Thickness Measurements <br /> Ultrasonic Thickness Measurements <br /> Used Antifreeze Tank <br /> Data Point Thickness Units <br /> 01 0.371 IN <br /> 02 0.353 IN <br /> 03 0.353 IN <br /> 04 0.333 IN <br /> 05 0.335 IN <br /> 06 0.354 IN <br /> 07 0.338 IN <br /> 08 0.356 IN <br /> 09 0.338 IN <br /> 10 0.337 IN <br /> Average 0.347 IN <br /> Std. Dev. 0.012 IN <br /> Hydrostatic Calculation <br /> Hydrostatic Calculation Used Antifreeze Tank <br /> Tank wall thickness, in 0.35 <br /> Tank Dia. In. 32.00 <br /> Depth of fluid in tank, ft 3.00 <br /> S.G. of Fluid 1.05 <br /> Pressure of fluid at bottom of tank, psi 1.37 <br /> hoop stress at bottom of shell, psi 62.40 <br /> Yield Strength HDPE 3000.00 <br /> effective allowable stress, psi 1197.00 <br /> Safety Factor 19.18 <br /> Strandberg Associates 1(866) 388-0404 rwaterguy(a)rwaterguy.com 23 <br />