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XERXES <br /> CORPORATION <br /> August 26, 2019 <br /> Bill Robbins <br /> E-mail: wmrobbinc@comcast.net <br /> Re: One 8-foot-diameter 5,000-gallon Single-Wall Tank <br /> Buoyancy Calc - Grindstone Joe's, 14900 W. Highway 12#90, Lodi CA <br /> Dear Bill: <br /> We have summarized the buoyancy data you requested. All of the calculations are <br /> based on the site data you have provided to us and on nominal engineering values <br /> for the physical parameters. <br /> All of the calculations are based on standard engineering practice. We use <br /> approaches in a manner similar to the protocols presented in the PEI/RP 100-17 <br /> manual to calculate the underground tank Buoyancy Safety Factors. <br /> It is the tank owner's responsibility to determine the suitability and applicability of <br /> installation. Our sole responsibility in any installation is as stated in our Limited <br /> Warranty. <br /> Our calculations show that, given the installation parameters that you have <br /> provided to us (calculated with the tank empty, the water table at the same <br /> elevation as the finished grade, burial depth of 2 feet, and anchored using factory- <br /> supplied deadmen) the Buoyancy Safety Factor is 1.25:1. We recommend a <br /> minimum Buoyancy Safety Factor of 1.20:1. I have included a copy of the <br /> worksheet for your files. <br /> If we can be of additional assistance, please feel free to contact us. <br /> Sincerely, <br /> S <br /> ___ <br /> Teji der Singh <br /> Design Engineer - Sales Support <br /> Attachment <br /> 7901 Xerxes Avenue South • Minneapolis • Minnesota• United States• 55431-1288 <br /> Ph: 952-887-1890 • Fax: 952-887-1870 •Web: www.zcl.com <br />