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Hazardous Waste Tank System January <br /> Written Assessment per CCR Title 22 <br /> Jiffy Lube Store#2322 500 E. Kettleman Lane, Lodi CA 95240 2020 <br /> Tank Integrity: The drum has been in service for 10 years and shows no <br /> evidence of leaking. <br /> Ultrasonic Thickness Gauge Measurements <br /> UTG Thickness - Used Antifreeze drum <br /> Data Point Thickness Units <br /> 1 0.212 IN <br /> 2 0.386 IN <br /> 3 0.218 IN <br /> 4 0.224 IN <br /> 5 0.226 IN <br /> 6 0.224 IN <br /> 7 0.226 IN <br /> 8 0.225 IN <br /> 9 0.226 IN <br /> 10 0.229 IN <br /> average 0.24 IN <br /> std. dev. 0.052 IN <br /> Hydrostatic Calculation <br /> Hydrostatic Calculation Used Antifreeze Drum <br /> Tank wall thickness, in 0.24 <br /> Tank Dia. In. 23.00 <br /> Depth of fluid in tank, ft 2.63 <br /> S.G. of Fluid 1.05 <br /> Pressure of fluid at bottom of tank, psi 1.19 <br /> hoop stress at bottom of shell, psi 57.23 <br /> Yield Strength HDPE 3000.00 <br /> effective allowable stress, psi 1197.00 <br /> Safety Factor 20.92 <br /> Integrity testing findings: Based on the above noted integrity test and the <br /> results obtained from that test, the tank has sufficient integrity for its intended <br /> use. Initials: JS <br /> Strandberg Associates 1(866) 388-0404 john@strandbergassociates.com 18 <br />