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APPENDIX A ABOVEGROUND STORAGE TANK ASSESSMENT CALCULATIONS QUALITY FLEET SERVICE CENTER VAN DE POL ENTERPRISES, INC. 4899 South Airport Way, Stockton, California The 1,000 -gallon (gal) aboveground waste oil tank (AST) has parameters as indicated on Figure 3. AST WEIGHT The 1,000 -gallon AST (AST,,000) has a weight found by examining the tank thickness, volume and utilizing a known tank weight for a 1,000 -gal, double walled AST . The AST1,00o has a weight of 1,895 pounds (lb) when empty and a laden weight of approximately 9,395 Ib. The weight of 1,000 -gal of waste oil, using a conversion factor of 7.5 Ib per gallon, is 7,500 Ib. The AST1,000 weight is found to be 1,895 Ib. HORIZONTAL SHEAR CALCULATION V = 0.7 x Ca x I x Total AST Empty Weight where: V = Horizontal Shear CS = 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 1,895 pounds force (Ibf) = 477.5 Ibf The horizontal shear is calculated at approximately 477.5 lb. OVERTURN MOMENT CALCULATION OT = [V x Tank Height (HP) x 0.5] - [Total AST Empty Weight x Tank Width (WP) x 0.5] where: OT = Overturn Moment HP = Tank Height = 60 in WP = Tank Width = 34 in OT = [477.5 Ibf x 63 in x (1 ft /12 in) x 0.5] - [1,895 Ib x 36 in x (1 ft /12 in) x 0.5] _ = 1,253.4 Ib — 2,842.5 Ib = - 1,590.1 Ibf ft The tank overturn moment is calculated at approximately — 1,590.1 Ibf ft. which is less than zero, therefore the tank will not overturn.