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Blasting Plan Colorado Rose Red Page 2 <br /> declined participation in the survey. In the third step, the <br /> owners that choose to participate in the survey will be contacted <br /> by Colorado Rose Red to make arrangements for a representative of <br /> Colorado Rose Red, Inc . to perform the inspection. <br /> The applicant will commit to conducting seismic monitoring for <br /> each blasting event and retaining records of any results recorded <br /> by the monitoring device . In addition, at structure owners <br /> requests, the same type of monitoring equipment will be place <br /> near their structure during a blasting event . Records of each <br /> shot monitored will be documented as noted on "o. " below. The <br /> peak partial velocities will be recorded in three mutually <br /> perpendicular directions for all shots . <br /> Please refer to the Figure - BP for additional information on <br /> shot layout patterns and other technical aspects used. <br /> All blasting will take place during daylight hours only and <br /> typically one shot per day is planned. Shots will be designed to <br /> have a maximum peak particle velocity (MPPV) no greater than 1 . 0 <br /> inch/second at a point between the shot and the nearest <br /> structure, at a point where a straight line from the hole to the <br /> structure intersects the structure owners property line . <br /> Each three (3) inch by 18 foot deep hole will be loaded with 30 <br /> lbs . of blasting agent and stemming will be placed over the <br /> powder charge . This is approximately 500 or the amount of <br /> blasting agent allowed as calculated using the following table <br /> provided by the Division of Reclamation Mining and Safety. <br /> Distance (D) Maximum Allawuhle Scaled-Distance <br /> from the Blasting Site Peak Particle Factor to he <br /> tin feet) Velocity (V max) Applied without <br /> for Ground Vibration Seismic Monitoring <br /> tin inchc%/,wcondtl) (Dsl) <br /> 0 to A(X) 1,25 50 <br /> 301 u) 5000 1.00 55 <br /> 5001 and hryolnd 0.75 65 <br /> 11 Ground vcloctty shall he nicasured a% the particle velocity. Peak <br /> particle Selo citic+ N tall he rccorLled in three mutually perpendicular <br /> directions from the blasting, site. The tnaximutn peak particle velocity <br /> %hall he the largest of any of the three tttcasuretnents. <br /> There may be a time when 2 holes are detonated very close <br /> together (8 ms separation) as two lines are sequentially shot . <br /> This will keep the air overpressure number at less then 133 dB at <br /> a point between the shot and the nearest structure as noted <br /> above . This is the same point where the seismic monitoring <br /> equipment will be located. The following table will also provide <br /> the blasting contractor with air overpressure levels we must <br /> maintain at the mine . <br />