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XERXES <br /> CORPORATION <br /> August 7, 2020 <br /> Nathan Groover CC: Rick Whately <br /> E- mall : naroover(uldimensiongrouo. com <br /> Re : One 10-foot- diameter 20, 000- gallon Double- Wall <br /> One 10- foot- diameter 12, 000 x 8,000- gallon Double- Wall MCT <br /> Buoyancy Calc - 7- Eleven #41342, 1233 E Charter Way, Stockton, CA <br /> Dear Nathan : <br /> We have summarized the buoyancy data you requested . All of the calculations are based <br /> on the site data you have provided to us and on nominal engineering values for the <br /> physical parameters. <br /> All of the calculations are based on standard engineering practice. We use approaches <br /> In a manner similar to the protocols presented in the PEI/RP 100 - 17 manual to calculate <br /> 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 provided to <br /> us (calculated with the tank empty, burial depth of 5 feet and 3 Inches, the water table <br /> at the same elevation as finished grade , and anchored using factory- supplied deadmen) <br /> the Buoyancy Safety Factors are as follows : <br /> Tank Buoyancy Safety Factor <br /> 20, 000- gallon Tank 1. 60 : 1 <br /> 12, 000 x 8, 000- gallon MCT 1. 53 : 1 <br /> We recommend a rrdnimum Buoyancy Safety Factor of 1 . 20 : 1 . I have included copies of <br /> the worksheets for your files . <br /> If we can be of additional assistance, please feel free to contact us. <br /> Sincerely, <br /> ( s4 <br /> Te inder Singh <br /> Design Engineer-Sales Support <br /> Attachments - 2 <br /> 7901 Xeres Avenue South • Minneapolis • Minnesota • United States • 55431 -1288 <br /> Ph: 952-887-1890 • Fax: 952-887-1870 9 Web: www. zcl.com <br />