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NfImRXES <br /> BY SHAWCOR <br /> March 15, 2022 <br /> Tim Budniewski CC : Jay Boston <br /> E - mail : tim budniewski@nwpump . com <br /> Re : One 10400t-diameter 12 , 000 x 8 ,000 -gallon -gallon Double-Wall <br /> One 10 -foot-diameter 16 , 000 x 6 ,000-gallon Double-Wall <br /> Buoyancy Calc - Ripon - Northwest Pump <br /> Dear Tim : <br /> We have summarized the buoyancy data you requested . All of the calculations are based on <br /> the site data you have provided to us and on nominal engineering values for the physical <br /> parameters . <br /> All of the calculations are based on standard engineering practice . We use approaches in a <br /> manner similar to the protocols presented in the PEI/RP 100 - 20 manual to calculate the <br /> underground tank Buoyancy Safety Factors . <br /> It is the tank owner' s responsibility to determine the suitability and applicability of installation . <br /> Our sole responsibility in any installation is as stated in our Limited Warranty . <br /> Our calculations show that, given the installation parameters that you have provided to us <br /> (calculated with the tank empty, burial depth of 4 feet, the water table at the same elevation <br /> as the top of the tank, and no secondary anchorage) the Buoyancy Safety Factors are as <br /> follows : <br /> Tank Buoyancy Safety Factor <br /> 12, 000 x 8, 000 1 . 45 : 1 <br /> 16 , 000 x 6 , 000 1 . 42 : 1 <br /> We recommend a minimum Buoyancy Safety Factor of 1 . 20 : 1 . I have included copies of the <br /> worksheets for your files . <br /> If we can be of additional assistance, please feel free to contact us . <br /> Sincerely, <br /> Je rey Lexvoid <br /> Senior Applications Engineer <br /> Attachments - 2 <br /> 7901 Xerxes Avenue o + 1 952-887-1890 <br /> South, Suite 201 <br /> Minneapolis, MN xerxes.com I Shawcor.com <br /> 55431 -1288 <br />