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27 August 2012 <br /> AGE-NC Project No. 12-2181 <br /> Page 5 of 6 <br /> 4.2. HYDROSTATIC EVALUATION RESULTS <br /> The collected hydrostatic evaluation data was reported at an average 4 psi and 3.5 psi for <br /> the primary and secondary annular spaces, respectively. Results indicated both the primary <br /> and secondary AST shells did not leak at the time of the evaluation. Evaluation results are <br /> provided in Table 4. <br /> 5.0. SEISMIC ANALYSIS <br /> A seismic analysis is provided to verify the AST will not tip or turn over during a seismic <br /> event. Seismic calculations are included as Appendix A. <br /> 5.1. SEISMIC CALCULATION <br /> The seismic analysis is calculated by using AST specifications and finding the horizontal <br /> shear, the over turn moment and the safety factor the AST will withstand during a seismic <br /> event. Seismic calculations are included as Appendix A. <br /> 5.1.1. AST Specifications <br /> The 550-gallon AST primary and secondary compartment materials of manufacture are <br /> discussed in Sections 2.1.3 and 3.1.The AST weighs approximately 930 pounds(Ibs)when <br /> empty. Waste oil is temporarily stored within the tank; 550-gallons of waste oil weighs <br /> approximately 4,587 lbs. The total seismic load of the tank is calculated to be 930 Ib force <br /> (Ib)when empty and 5,517 Ib,when full. <br /> 5.1.2. Seismic Calculation Results <br /> The pounds of horizontal shear are calculated at approximately 234 Ibf. The tank overturn <br /> moment is calculated at approximately-1,392 Ibf foot(ft). The safety factor was calculated <br /> at approximately 4. The tank, without additional components, is of sufficient weight to not <br /> spill during a potential seismic event for this area. Figure 3 shows the AST top and north <br /> east sides with dimensions. The seismic calculations are included as Appendix A. <br /> Advanced GeoEnvironmental,Inc. <br />