2006-03-20_PERMIT FILE - M2006028

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Noise Mitigation i iii~ii iiiii iii~~i i~~i uii~~i iii iiiiiii ~~i ii~ii iiii ~i~i 599942 01/27/2006 01:53P Ann Eddins 5 of 7 R 36.00 D 0.00 Delta Cty, CO Clerk & Rec 10. (a) To the extent appliceble, and except as set forth herein, § 25-12-103, C.R.S. (Maximum Permissible Noise Levels), shall be and hereby is incorporated herein as set forth in its entirety. This development shall be conducted in a manner so that any noise produced is not objectionable due to intermittence, beat frequency or shrillness. The commercial classification of the statutory noise standards is most appropriate for this area, the sourxi levels of noise radiating from the property line, attributhble to AppGcartt's mining andfor crushing operations, wherein the development is located at a distance of twenty-five (25) feet or more therefrom in excess of the db(A) set forth below for the following time periods shall constitute prima facie evidence chat such noise is a public nuisance. (1) 7:00 a.m. to the next 7:00 p.m., Monday through Friday: 60 db(A) (2) 7:00 p.m. to the next 7:00 a.m., Monday through Friday and at all times on weekends: 55 db(A) (3) In the hours between 7:00 a.m. and the Went 7:00 p.m., the noise levels pemtitted herein may be increased by ten (10) db(A) for a period not to exceed fifteen (15) minutes in any one-hour period. (b) At any point 200 feet beyond the Applicant's property line, the noise level shall not exceed 55 db as provided for in Colorado Revised Statutes for Residential Areas. (See § 25-12-103, C.R.S.) In the hours between 7:00 a.m. and the next 7:00 p.m., the noise levels permitted herein may be increased by ten (10) db(A) for a period not to exceed fifteen minutes in any one-hour period. if this standard cannot be met, then the development will not be authorized to proceed. 11. Noise reduang measures may inlude the following: (a) If a generator is used to provide power to the crusher, ft may be housed in an insulated modular or nrobile structure, may incorporate the use of a residential or a large industrial muffler, for purposes of sound mitigation, and maybe paced in such a directlon to minimize noise emanating from the gravel operation site. (b) All other equipment powered by internal combustion engines operating on the site maybe equipped with functional industrial mufners. (c) Applicant may use existing barriers, may construct a berm along the full length of the western property line at a height of eight (8) feet and provide adequate vegetation to minimize erosion of the berm, and may create and maintain stockpiles to the extent necessary to prelude to the greatest extent possible the movement of sound towards residences in the area. (d) Rubberized material may be used to line dump points on the crusher. 12. If and when distance-activvated backup alarms are used on County equipment in Delta County gravel pits, such alarms shall be installed on applicable equipment used in this mining operation.