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0 <br />Praxair Services, Inc. <br />IR 3755 N. Business Center Drive <br />Tucson, AZ 85705 <br />Praxair Services,Inc. Tel: (800) 394-9929 <br />Fax: (520) 293-1306 <br />NEW CONSTRUCTION ENHANCED LEAK DETECTION (CELD) <br />FINAL TEST RESULTS <br />Testing was performed 7/12-14/2006 using hand-held detectors and on-site lab analysis. Leak <br />simulation established a tracer soil migration time of 3.5 hours; backfill samples were collected and <br />analyzed a minimum of 3.5 hours from system inoculation. The multiple leaks detected were repaired <br />by contractor and re -tested tight before the end of the testing event. See attached leak log for details. <br />QA Summary: Test data and information has been reviewed and conforms to ELD procedure and <br />protocol. Results have been verified; all systems tested pass. <br />Reviewed By: Drew Burk 7/28/2006 <br />Signature: 6,Lk,. <br />: Attached Leak Log described issues encountered and repaired during test duration <br />2 of 2 39092NC QA Final DB.xls <br />