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pf_03616
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Last modified
7/17/2007 2:38:22 PM
Creation date
6/6/2006 3:59:54 PM
Metadata
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Template:
Planning Files
Planning Files - Planning File #
3616
Planning Files - Type
Interim Use Permit
Address
2880 WALNUT ST
Applicant
Shafer Contracting
Status
Approved
PIN
082923320001
Date Final City Council Action
12/28/2005
Planning Files - Resolution #
10281
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<br /> <br />a more <br /> <br /> <br />structures <br /> <br />near <br /> <br /> <br />a concern. Because <br /> <br /> <br /> <br />to perform vibration <br />rock crusher. <br /> <br />at <br /> <br /> <br />primary rock crusher and <br /> <br />to <br /> <br />were at <br /> <br />I, 1 <br /> <br /> <br />200' <br /> <br />of rock crushing activities. <br /> <br />PROCEDURES AND RESULTS <br /> <br />Ground vibrations were monitored on December 2,2004, using an Instantel DS477 Blastmate III <br />seismograph. The seismograph consists of a geophone, keyboard, plotter, and liquid crystal <br />display. The unit was programmed to self trigger if the peak particle velocity (PPV) exceeded <br />0.005 inches per second (in/s) at any time during our monitoring. Monitoring was performed at <br />each of the selected distances for time periods of two to five minutes, <br /> <br />Prior to each monitoring period, the geophone was aligned and leveled on the ground surface, and <br />the monitor was turned on. Peak particle velocities and frequencies were recorded for each <br />monitoring period and printed in hard copy, The resultant data was reviewed and the highest peak <br />particle velocity from each monitored distance have been listed in the following tabulations. <br /> <br />Table L Vibration Monitoring Results on December 2, 2004 <br /> Primary Rock Crusher <br />Time PPV Frequency Approximate distance to <br /> ( in/ s ) (Hz) rock crusher (ft) <br />10:12 AM 0.068 13 50 <br />10: 15 AM 0.054 14 100 <br />10:20 AM 0.038 14 150 <br />10:26 AM 0.039 13 200 I <br />
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