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U fj'Ju� - 17 . 2003` 9 : 34AM' ""'GIaoi Enviro�me�taI �uxr, No, 0915 P . j9DI,,
<br /> XEFMS(!D
<br /> CORPORATION
<br /> June 17, 2003
<br /> Mr. Steve Mlbs C: aim Anderson
<br /> Glacier Environmental Xerxes Corp.
<br /> Fax; (425) 290-9 .86 Fax: (714) 632-7133
<br /> Re: Xerxes 8', 10,000-gallon DWT-Ii (w/ brine)
<br /> Xerxes 81, 15,000-gallon DWT'-II (w/ brine)
<br /> 7-Eleven #19976, Manteca, Califomla
<br /> Dear Mr. Mibs,
<br /> We have summarized the buoyancy data you requested. All of the calculations are based on the
<br /> site data that you have provided to us and on standard engineering values for the physical
<br /> parameters, which you provided for the site.
<br /> All of the calculations have been made In accordance with the protocols presented in the PEI
<br /> manual RP-100/2000, These protocols present an analysis of underground tank buoyancy,
<br /> which Is based on sound engineering practice.
<br /> It Is the tank owner's responsibility to determine the suitability and applicability of Installation.
<br /> Our sole responsibility In any installation Is that presented In our standard warranty.
<br /> Our calculations show that, given the Installation parameters that you have provided to us
<br /> (water table at mid-tank, standard Xerxes deadmen), the Buoyancy Safety Factors are as
<br /> follows;
<br /> Tank Ty
<br /> 8', 10K DWT-II,,,,,,,,,,,,,,,,,,,,,,,,,,,, 5.25:1
<br /> 8'0 15K DWT-II............................ 5.02:1
<br /> Xerxes recommends 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, I hereby Ge City that this plan, speciticatlon,or
<br /> report was prepared by me or under my direct
<br /> supervision and that 1 am a duly ws of the
<br /> professional Eno4near un e
<br /> State of Minne John p Burwsll
<br /> 30hn Burwell, P � � I- Reg,No a4879
<br /> Manager, Eng1nelering Services ate
<br /> Attachments
<br /> CORPORATE OFFICE/7901 XERXES AVENUE SOUTH,MINNEAPOLIS, MINNESOTA$5431
<br /> PHONE(852)887.1890 FAX(962)887-1870
<br />
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