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70 <br />21. Within seven years of issuance of this permit, American Stone Company shall relocate <br />the primary crusher and related equipment to the pit. <br />22. American Stone Company shall request that the following conditions also be made <br />conditions of its amended mining permit: <br />(a) American Stone Company shall use the most current, generally accepted blasting <br />techniques available and will inform the County Manager, or designee, before changing <br />blasting techniques. <br />(b) American Stone Company shall adhere to the following limits to be measured by <br />seismograph at the nearest property line of property under control of American Stone <br />Company during the mining process; <br />(i) Air blast limit of 125 decibels. <br />(ii) Maximum peak particle velocity of 0.6 inches per second, provided that <br />American Stone Company will strive for a maximum peak particle velocity limit <br />of 0.5 inches per second. <br />(c) American Stone Company shall limit its continuous noise operations (plant <br />processing including the jaw crusher) at the boundary of the property encumbered by the <br />original special use permit and at the boundary of the property added to this modified <br />special use permit to 60 decibels. <br />23. American Stone Company shall limit blasting charges to a maximum of 325 pounds per <br />delay, and at least 80% of its blasts will be less than 300 pounds per delay. <br />24. American Stone Company shall take all reasonable precautions to prevent fly rock from <br />leaving its property. <br />25. When blasting east of the current location of SR 1104, American Stone Company shall <br />monitor each blast with two seismographs. One seismograph shall be located at the nearest <br />off site occupied structure as required by American Stone Company's North Carolina <br />Mining Permit.' The second seismograph shall be located at the nearest property line. <br />26. American Stone Company shall encourage all truck operators leaving the premises to be <br />mindful of lawful weight and safety of load practices, including the use of covers when <br />required by law. <br />27. American Stone Company will install a truck spray bar and rumble strips, and will require all <br />loaded trucks leaving the site to pass over the rumble strips, and will require all truck <br />operators with uncovered loads to wet their loads before leaving the site. <br />28.American Stone Company will post and maintain a notice in a prominent position visible to <br />all truck operators leaving the site encouraging them to keep their loads covered and advising <br />them that N. C. Gen. Stat.§ 20- 116(g) prohibits a vehicle from being driven on any highway <br />unless the vehicle is constructed or loaded so as to prevent any of its load from dropping, <br />sifting, leaking or otherwise escaping from the vehicle. <br />Isg: orangecounty \SpecialUsePerniitResolution #2 (geg revisions 4- 10 -01) <br />