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=nv=7 r,c; 334 <br /> 17. Within two years of the issuance of this permit American Stone Company shall complete Ll <br /> the installation of baffling equipment in accordance with the guidelines and in general <br /> conformance with the National Scone Association's Community Noise Manual for me <br /> purpose of reducing plant noise. <br /> I8.American Stone Company shall continue its current"hemming"practices that were <br /> implemented in 1997.This change represents son increase by 10%over prior levels ofthe <br /> aunt of"lemming material"used on the top two benches of the existing and expanded <br /> quarry pit. <br /> 19. American Stone Company shall construct a 20'high berm, landscaped with grass and trees <br /> as recommended in the National Stone Association's Community Noise Manual,between <br /> the pit and relocated SRI 104 as shown on the submitted Plans for the purpose of <br /> reducing noise in the buffer area surrounding the edge of We quarry.In all instances,the <br /> berm adjacent to the mine shall be expanded ahead of the mine expansion <br /> 20. Prior to commencing blaming operations on the east side of the curzeM location of SR 1104 <br /> and in all events no later than Ihree years from fire date the issuance of this permit, <br /> American Stone Company shall begin to enclose equipment used in the secondary portion of <br /> the plant operations including the crushing and screening towers following the guidelines <br /> and in general conformance with the National Stone Association's Community Noise <br /> Manual and shell complete the enclosures within four years from the date the permits are <br /> issued. <br /> 21. Within scorn 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 want <br /> (a) American Stone Company shall use the most current, amorously accepted blasting <br /> techniques available and will inform the County Manager,or designm,before changing <br /> Wasting labrdques. <br /> (b) American Shine Company shell adhere to the fallowing limits to be measured by <br /> seismograph at the nearest property line of pmparry under control of American Stone <br /> Company during the mining process; <br /> (i) Air blast limit of 325 decibels. <br /> (it) Maximum peak particle velocity of 0.6 inches per second,provided that <br /> American Stone Company will arrive for a maximum peak panicle 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 emsher)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 limitblaslingcharges ton maximumof325 powdsper <br /> delay,and at least 80%of its blasts will be less than 300 pounds par delay. <br />