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ABOVEGROUND STORAGE TANK ASSESSMENT CALCULATIONS MOUNTAIN VALLEY EXPRESS 1019 Bessemer Avenue, Manteca, California The 550-gallon (gal) aboveground storage tank (AST) has parameters as indicated on Figure 3. AST WEIGHT The AST has a weight of 930 pounds (lb)when empty and a laden weight of approximately 5,517 Ib when full with waste oil.The weight of 550-gal of waste oil,using a conversion factor of 8.34 Ib per gallon,is 4,587 Ib.The AST em pty weight is 930 Ib (per AST manufacturer). HORIZONTAL SHEAR CALCULATION V = 0.7 x Ca x I x Total AST Empty Weight, where:V = Horizontal Shear C5= Seismic Coefficient(Table 16-Q, 1997 Uniform Building Code (UBC)) I = Occupancy Importance Factor(Table 16-k, 1997 UBC)) V= 0.7 x 0.36 x 1.0 x 930 pounds force (lb,) = 234 Ib, The horizontal shear is calculated at approximately 234 lbf. OVERTURN MOMENT CALCULATION OT= [V x Tank Height(HP)x 0.5]-[Total AST Em pty W eight x Tank Width (W P)x 0.5],where:OT=Overturn Moment HP = Tank Height = 48 inch WP= Tank Width = 48 inch 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 0.51 =468 Ib,ft- 1,860 Ib,ft _ - 1,392 Ib,ft The tank overturn moment is calculated at approximately- 1,392 Ib,ftwhich is less than zero,therefore the tank will not overturn. SAFETY FACTOR CALCULATION SF = [(Total AST Empty Weight x WP x 0.5)] _ [V x Tank Height(HP)x 0.5], where: SF= Safety Factor SF = [( 930 Ib,x 48 in x (1 ft_ 12 in)x 0.5)] _ [234 Ib,x 48 in x (1 ft/12 in)x 0.5] = 1,860 Ibfft_468 Ib,ft = 4 The safety factor was calculated at approximately 4 which is greater than 1,therefore the safety factor is sufficient to not overturn. Advanced GeoEnvironcnental,Inc.