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TABLE 2.05.3(6)(a) -1 AIR -BLAST LIMITS <br />Low- Frequency Limit of Measuring <br />Maximum Level <br />System, in Hz ( ±3dB) <br />in dB <br />0.1 Hz or lower -Flat response <br />134 peak <br />2 Hz or lower - Flat response <br />133 peak <br />6 Hz or lower - Flat response <br />129 peak <br />C - Weighted, Slow response <br />105 C <br />NHN Mine seismographs record at the 2Hz or lower level. <br />MAXIMUM PEAK PARTICLE VELOCITY LIMITS <br />Distance (D) <br />Maximum Allowable <br />Scaled- Distance <br />from the Blasting Site <br />Peak Particle <br />Factor to be <br />(in feet) <br />Velocity (PPVmax) <br />Applied without <br />for Ground Vibration <br />Seismic Monitoring <br />(In inches /second +) <br />(DS + +) <br />0 -300 <br />1.25 <br />50 <br />301 to 5000 <br />1.00 <br />55 <br />5001 and beyond <br />0.75 <br />65 <br />+ Ground velocity shall be measured as the particle velocity. Peak particle velocity shall be <br />recorded in three mutually perpendicular directions from the blasting site. The maximum peak <br />particle velocity shall be the largest of any of the three measurements. <br />++ Applicable to the scaled- distance equation of Rule 4.08.4(10)(c)(i): W= (D /DS)2. WFC uses <br />seismic monitoring, so a modified Scaled- Distance factor is used. See subsection 4.0. <br />SECTION 2.05.3(6)(a) PAGE - 14 - JULY 2013 <br />lR -6 "-7 <br />'J opvwd <br />l 7 -1 uj- 2--01 -5 <br />