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Walker <br />From: <br />Sent: <br />To: <br />Cc: <br />Subject: <br />Walker, Byron <br />Friday, August 22, 2003 10:11 AM <br />Crellin Scott (KEC) (E-mail) <br />Hernandez, Dan <br />Review of Blast Report, Blast of February 12, 2003 <br />\1~~~.. <br />NJ <br />C-i4'SI-c(q 2,nr~r,-~-K <br />Dear Mr. Scott, thank you for the information (hole depths and holes [hat were wet) of August 21, 2003, 1:06 PM (e-mail <br />and fax). From this and previous information, please find attached my reconstruction of the blast. As reported on the blast <br />record, a maximum of two holes went off within any 8-millisecond time period. There were 31 incidences where two holes <br />went off during 8-ms time periods during the blast, with the maximum amount of explosives in any one of the sets being <br />4568 pounds (4566 on the printout corrected for 1 each extra primer in two deep holes). This is below the 6112 pounds <br />permissible. A maximum of 5309 pounds within an 8-millisecond time period is indicated on the blast record (a difference <br />of 16%). The analysis also indicates that the total weight of explosive used was 218,931 pounds, including the primers. <br />The blast record indicates 224, 837 pounds (2.7% difference). The analysis indicates that 160,809 pounds of anfo was <br />used. The blast record indicates that 164,229 pounds of anfo were used (2% difference). The analysis indicates that <br />57,912 pounds of emulsion was used, the blast record indicates that 60,668 were used (5% difference). Please review the <br />reconstruction for accuracy and, as you have done before, let me know if you find any errors. Yours truly, Byron G. Walker <br />EPS <br /> <br />2 12 03 Colovryo Feb 12 2003 blast <br />blast analysis... analysis.bs... <br />