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r A <br />NOTE: Seismograph was set -up on Tunnel Drive outside the lower gate entrance to our shop at <br />201 Tunnel Drive. Seismograph registered .24 in /s @ 21 HZ (peak particle velocity) and .004 PSI <br />@ 7.1 HZ (air blast) at 4:59pm on June 7, 2013. <br />Hole Depth <br />High Explosives(lbs) <br />k(average) <br />• <br />booster) <br />• • ' <br />NOTE: Seismograph was set -up on Tunnel Drive outside the lower gate entrance to our shop at <br />201 Tunnel Drive. Seismograph registered .24 in /s @ 21 HZ (peak particle velocity) and .004 PSI <br />@ 7.1 HZ (air blast) at 4:59pm on June 7, 2013. <br />