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Hazardous Waste Tank System <br /> Written Assessment per CCR Title 22 February <br /> Jiffy Lube Store#3808, 3276 W. Grant Line Rd. <br /> Tracy, CA 95304 2019 <br /> Tank Integrity: The tank has been in service for 1 year and shows no evidence <br /> of leakage. <br /> Ultrasonic Thickness Gauge Measurements <br /> UTG Measurement - Used Antifreeze Tank <br /> Data Point Thickness Units <br /> 01 0.177 IN <br /> 02 0.176 IN <br /> 03 0.174 IN <br /> 04 0.177 IN <br /> 05 0.170 IN <br /> 06 0.175 IN <br /> 07 0.179 IN <br /> 08 0.181 IN <br /> 09 0.189 IN <br /> 10 0.206 IN <br /> Average 0.180 IN <br /> Std. Dev. 0.010 IN <br /> Hydrostatic Calculation <br /> Hydrostatic Calculation Used Antifreeze Tank <br /> Tank wall thickness, in 0.18 <br /> Tank Dia. In. 29.00 <br /> Depth of fluid in tank, ft 2.93 <br /> S.G. of Fluid 1.05 <br /> Pressure of fluid at bottom of tank, psi 1.33 <br /> hoop stress at bottom of shell, psi 107.21 <br /> Yield Strength HDPE 3000.00 <br /> effective allowable stress, psi 1197.00 <br /> Safety Factor 11.17 <br /> Strandberg Associates 1(866) 388-0404 iohn(@strandbergassociates.com 21 <br />