P-0395 - No Fault Well Repair Fund Policy 06-04-2002-9a

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pc~~2387 ~ ~L~ 334 17. Within two years of the issuance of this pern~it American Stone Company shall complete 41 the. installation of baffling equipment in accordance with the guidelines and in general conformance with the National Stone Association's Community Noise Manual for the • purpose of reducing plant noise. 18. American Stone Company shall continue its current "stemming" practices that were • implemented in 1997. This change represents an increase by 10% over prior levels of the amount of "stemming material" used on the top two benches of the existing and expanded quarry pit. 19. American Stone Company shall construct a 20' high berm, landscaped with grass and trees as recommended in the National Stone Association's Community Noise Manual, between the pit and relocated SRl 104 as shown on the submitted Plans for the purpose of reducing noise in the buffer area surrounding the edge of the quarry. In all instances, the berm adjacent to the mine shall be expanded ahead of the mine expansion. 20. Prior to commencing blasting operations on the east side of the current location of SR 1104 and in all events no later than three years from the date the issuance of this permit, American Stone Company shall begin to enclose equipment used in the secondary portion of the plant operations including the crushing and screening towers following the guidelines and in general conformance with the National Stone Association's Community Noise Manual and shall complete the enclosures within four years from the date the permits are issued. 21. Within seven years of issuance of this permit, American Stone Company shall relocate the primary crusher and related equipment to the pit. 22. American Stone Company shall request that the following conditions also be made conditions of its amended mining permit: (a) American Stone Company shall use the most current, generally accepted blasting techniques available and will inform the County Manager, or designee, before changing blasting techniques. (b) American Stone Company shall adhere to the following limits to be measured by seismograph at the nearest property line of property under control of American Stone Company during the mining process; (i) Air blast limit of 125 decibels. (ii) Maximum peak particle velocity of 0.6 inches per second, provided that American Stone Company will strive for a maximum peak particle velocity limit of 0.5 inches. per second. (c) American Stone Company shall limit its continuous noise operations (plant processing including the jaw crusher) at the boundary of the property encumbered by the original special use permit and at the boundary of the property added to this modified • special use permit to 60 decibels. 23. American Stone Company shall limit blasting charges to a maximum of 325 pounds per . delay, and at least 80% of its blasts will be less than 300 pounds per delay.