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Stockton Dodge, Waste Oil & Waste Antifreeze Tank Assessment (2010) <br /> Seismic/Anchoring findings: The tank as designed and oper t d, and the <br /> containment area in which it is located are adequately anchor nd are <br /> seismically sound. Initials: <br /> Leak Test: <br /> The tank has been in service for 5 years and shows no evidence of <br /> leakage. <br /> Hydrostatic Calculation: Waste Antifreeze Tank <br /> Tank wall thickness, in 0.25 <br /> Tank Dia. In. 36.00 <br /> Depth of fluid in tank, ft 3.70 <br /> S.G. of Fluid 1.03 <br /> Pressure of fluid at bottom of tank, psi 1.65 <br /> hoop stress at bottom of shell, psi 118.90 <br /> Yield Stress steel unknown, psi 2175.00 <br /> joint effeciency, butt weld unknown 1.00 <br /> effective allowable stress, psi 2175.00 <br /> Safety Factor 1 18.29 <br /> Waste Antifreeze Primary <br /> Point ID Thickness <br /> 1.00 20.93 0.82 <br /> 2.00 22.68 0.89 <br /> 3.00 22.89 0.90 <br /> 4.00 17.45 0.69 <br /> 5.00 17.89 0.70 <br /> 6.00 18.78 0.74 <br /> 7.00 17.37 0.68 <br /> 8.00 17.27 0.68 <br /> 9.00 16.44 0.65 <br /> 10.00 17.61 0.69 <br /> average 18.93 0.75 <br /> Standard Deviation 2.36 0.09 <br /> Corrected Average 6.26 0.25 <br /> Corrected SD 1 0.78 0.03 <br /> Integrity testing findings: Based on the above note tegrity test and the <br /> results obtained from that test, the tank has sufficient grity for its intended <br /> use. Initials: <br /> Strandberg Associates 1(866) 388-0404 (650) 329-8918 rwatergu r�anrwaterguy.corn 28 <br />