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BACKFILL AND GRADING <br />Backfilhng and grading was m progress behind the pit <br />EXPLOSIVES <br />Explosives are not stored on the site. They are delivered from a nearby supplier when needed <br />During the inspection I observed an overburden blast and the operators placement of seismographs <br />at each of the two residences nearest the blast. A photograph of one of the seismograph installations <br />is shown below. The distances from the blasting site to the residences were within the 301 to 5000 ft. <br />category of 4 08 4(10). The readouts from the seismographs indicated the peak particle velocity was <br />significantly less than the mawmum allowable hind of 1.00 inch/second. The operator properly <br />sounded blast warning signals and all-clear signals. <br /> <br />,r; <br />•~~,,. <br />-+T,~ <br />Vii' ~ ~• ~ i~ <br />SUPPORT FACILITIES <br />No problems were found in the facilities area. Spill barriers surround above-surface fuel tanks. <br />AIR RESOURCE PROTECTION <br />The blast observed during the inspection did not cause fugitive dust to leave the permit area Isee <br />photo below) <br />