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Standard Operating Procedure <br /> Sonic Drilling <br /> Document Number SWE-FSOP-302 <br /> Revision 0 <br /> Department Ahtna Southwest Operations <br /> Previous Document Number Original Document <br /> Originally Released April 1, 2022 <br /> Effective Date April 1, 2022 <br /> Approvals <br /> April 1, 2022 <br /> Christopher Ohland Date <br /> SWE Quality Assurance Manager <br /> &, --- {� April 1, 2022 <br /> Bruce Wilcer Date <br /> SWE Field Quality Control Manager <br /> Filename:m:��FSOP-302.00 <br />