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Tracy t..azda Waste Anti-Freeze Tank Assessment k�009) <br /> The tank has been in service for four years and there is no evidence of <br /> leakage from the tank. Hydrostatic calculations show the tank is suitably <br /> designed for its present use. <br /> Tracy Mazda <br /> Hydrostatic Calculation <br /> Thin walled Tanks <br /> Tank: Waste Antifreeze Cylindrical Vertical <br /> Material of Construction LDPE <br /> Tensile Strength, psi 1700.00 i <br /> Design Strength, psi 970.00 <br /> Diameter, inches 30.00v <br /> Height of shell, inches 40.00 <br /> Max s.g. of contents 1.05 <br /> Max pressure, psi 1.52 <br /> tank wall thickness, in 0.25 <br /> hoop stress on wall, psi 91.00 <br /> hoop stress is less than design strength <br /> tank is okay for hydrstatic <br /> Tank Buckling <br /> Modulus of Elasticity, psi 42000.00 <br /> poisson's ratio 0.50 <br /> buckling stress, psi 933.33 <br /> Buckling Force, lbs 21980.00 <br /> Horizontal Seismic Force, lbs 768.00 <br /> Design Seismic Force < Buckling Force <br /> Tank is okay for buckling <br /> :4�';fa a <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: <br /> Strandberg Associates 1(866) 388-0404(650) 329-8918 rwaterguy a,rwaterguy com 11 <br />