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Xerxes recommends a minimum Buoyancy Safety Factor of 1.20:1. I have included <br /> copies of the worksheets for your files. <br /> If we can be of additional assistance, please feel free to contact us. <br /> Yours truly, <br /> 9 � <br /> Jeffrey Lexvold <br /> Sales Engineer <br /> Attachments-3 <br /> *On the RST-H units, with the assumptions of water table to finished grade and <br /> minimum cover of 18"(the "worst-case"scenario) the resulting Buoyancy Safety <br /> Factor for the Xerxes' 1,500-gallon RST-77 is 1.39:1. Therefore, provided that an RST- <br /> II is buried to the required minimum burial depth, the Buoyancy Safety Factor for the / <br /> tank will exceed Xerxes'recommended Buoyancy Safety Factor of 1.20:1. Additional l <br /> cover from top of tank to finished grade (deeper burial) would only increase these <br /> Buoyancy Safety Factors. I have included a copy of the document for your files. <br /> Page 2 of 2 <br /> Xerxes Corporation 7901 Xerxes Avenue South, Minneapolis, MN 55431-1288 <br /> Telephone 952-887-1890 Facsimile 952-887-1870 <br />