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i <br /> Hazardous Waste Tank System July <br /> Written Assessment per CCR Title 22 <br /> Tracy'Foyota, 2895 Naglee Road,Tracy, CA 905304 2014 <br /> Tank Integrity: The tank has been in service for 13 years with no evidence of <br /> leaking. <br /> i <br /> y <br /> 1 <br /> Ultrasonic Thickness Measurements: <br /> UTG Measurement -The Survey Name: TTOYWA1 <br /> Waste Antifreeze Tank <br /> Data Point ID Thickness Units <br /> 01 0.370 IN <br /> 02 0.370 IN <br /> 03 0.370 IN <br /> 04 0.370 IN <br /> 05 0.370 IN <br /> 06 0.370 1 N <br /> 07 0.370 1 N <br /> 08 0.360 1N <br /> 09 0.360 1N <br /> 10 0.350 IN <br /> Average 0.366 IN <br /> Std. Dev. 0.007 IN <br /> Hydrostatic Calculation <br /> Hydrostatic Calculation: Waste Antifreeze Tank <br /> Tank wall thickness, in 0.31 <br /> Tank Dia. In. 36.00 <br /> Depth of fluid in tank, ft 3.68 <br /> S.G. of Fluid 1.05 <br /> Pressure of fluid at bottom of tank, psi 1.67 <br /> hoop stress at bottom of shell, psi 97.09 <br /> HDLPE, Strength, Tensile, PSI 4550.00 <br /> effective allowable stress psi 2593.50 <br /> Safety Factor 26.71 <br /> Strandberg Associates 1(866) 388-0401 rwater U _rwatergLty.Com 22 <br />