Laserfiche WebLink
ABOVEGROUND STORAGE TANK ASSESSMENT CALCULATIONS <br /> MOUNTAIN VALLEY EXPRESS <br /> 1019 Bessemer Avenue, Manteca, California <br /> The 550-gallon (gal) aboveground storage tank (AST) has parameters as indicated on Figure 3. <br /> AST WEIGHT <br /> The AST has a weight of 930 pounds (lb) when empty and a laden weight of approximately 5,517 Ib when full with <br /> waste oil.The weight of 550-gal of waste oil,using a conversion factor of 8.34 lb per gallon,is 4,587 lb.The AST empty <br /> weight is 930 Ib (per AST manufacturer). <br /> HORIZONTAL SHEAR CALCULATION <br /> V = 0.7 x Ca x I x Total AST Empty Weight, where: V = Horizontal Shear <br /> Cs= Seismic Coefficient(Table 16-Q, 1997 Uniform <br /> Building Code (UBC)) <br /> I = Occupancy Importance Factor(Table 16-k, 1997 UBC)) <br /> V= 0.7 x 0.36 x 1.0 x 930 pounds force (lb,) <br /> = 234 Ib, <br /> The horizontal shear is calculated at approximately 234 Ib,. <br /> OVERTURN MOMENT CALCULATION <br /> OT= [V x Tank Height(HP)x 0.5]-[Total AST Em pty W eight x Tank Width (W,)x 0.5],where: OT=Overturn Moment <br /> HP = Tank Height <br /> = 48 inch <br /> W P= Tank Width <br /> = 48 inch <br /> OT = [234 Ib,x 48 in x (1 ft/12 in)x 0.5] - [930 Ib,x 48 in x (1 ft/12 in) x 0.5] = 468 Ib,ft- 1,860 Ib,ft <br /> _ - 1,392 Ib,ft <br /> The tank overturn moment is calculated at approximately- 1,392 lb,ft.which is less than zero, therefore the tank will <br /> not overturn. <br /> SAFETY FACTOR CALCULATION <br /> SF = [(Total AST Empty Weight x WP x 0.5)] _ [V x Tank Height (HP) x 0.5], where: SF= Safety Factor <br /> SF = [( 930 Ib,x 48 in x (1 ft a 12 in) x 0.5)] _ [234 Ib,x 48 in x (1 ft/12 in)x 0.5] = 1,860 Ib,ft= 468 Ib,ft <br /> = 4 <br /> The safety factor was calculated at approximately 4 which is greater than 1,therefore the safety factor is sufficient to <br /> not overturn. <br /> Advanced GeoEnvironmental,Inc. <br />