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FEB-2S-05 11 :04 AM M LEE, ARCHITECT 916 3 8512 P. 01 <br /> )MRMS-3 <br /> CORPORATION <br /> February 17, 2005 <br /> Mike Lee CC: Michael Walton <br /> Mike Lee, Architect Walton Engineering, Inc. <br /> 3600 Seymore Ave. P.O. Box 1025 <br /> West Sacramento, CA 95691 W. Sacramento, CA 95691 <br /> Fax: 916-373-1172 <br /> BIII Robbins <br /> Fax: 925-283-4709 <br /> Re: One (1) Xerxes' 10 Foot 15,000-gallon DWT-II w/brine <br /> One (1) Xerxes' 10 Foot 8,000 x 7,000-gallon DWT-II w/brine <br /> 99 Shell, 7700 Moreland Ct, Stockton, CA 95212 <br /> Dear Mr. Lee, <br /> We have summarized the buoyancy data you requested. All of the calculations <br /> are based on the site data you have provided to us and on nominal engineering <br /> values for the physical parameters. <br /> All of the calculations are based on standard engineering practice. Xerxes uses <br /> approaches in a manner similar to the protocols presented in the PEI/RP 100- <br /> 2000 manual to calculate the underground tank Buoyancy Safety Factors. <br /> It Is the tank owner's responsibility to determine the suitability and applicability <br /> of 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 water table at finished grade, buried to a depth of <br /> 5.75 feet and unanchored) the Buoyancy Safety Factors are as follows: <br /> f <br /> 10 Foot 15 000- allon DWT-II 1.30:1 <br /> 10 Foot $ 000 x 7,000-gallon DWT-II 1.22:1 <br /> Pape 1 of 2 <br /> CORPORATE OFFICE7901 xERXE3 AVENUE SOUTH,MINNEAPOLIS,MINNESOTA 55431 <br /> PHONE(952)887.1890 FAX(952)B87-1870 <br />