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, . . . <br /> u . <br /> - <br /> . . . , <br /> . . - <br /> prepared by a North Carolina registered land surveyor 1.) <br /> • or engineer: - <br /> - <br /> 8.8.1.2 Standards of Evaluation <br /> - - <br /> The following standards shall be used in evaluating an <br /> application for a permit to conduct extraction of earth <br /> products:. . <br /> a) The applicant demonstrates that the extractive use <br /> • - operation fulfills primarily a local need as opposed <br /> . . <br /> to a regional need in terms of supplying sand and/or <br /> grave/ for building and construction purposes. <br /> b) All operations associated with extraction shall conform <br /> , to the following performance standards: <br /> 1) Direct illumination resulting from the operation <br /> shall not fall upon any land not covered by the <br /> application. <br /> - . <br /> 2) Equivalent sound levels at the boundaries of the <br /> extraction site shall not exceed the following <br /> . <br /> . standards: <br /> - ' - Between 7:00 a.m. and 7:00 p.m. 68dBA -- . <br /> ' 3 <br /> - Between 7: 00- p.m. and 7:00 a.m. 58dBA <br /> .- - <br /> 3) Vibration levels at the boundaries of the extraction <br /> : . site shall not exceed the following standards: <br /> 2 - Maximum Peak particle Velocity <br /> - Steady state 1.0 inches/second <br /> - Impact 2.0 inches/Second . . <br /> --- , - . Vote: The maximum particle velocity shall be the . <br /> 4.- -. - . - ' - product of two (2) times the frequency in <br /> ' cycles per second times the sum of three (3) <br /> mutually perpendicular displacement components <br /> recorded simultaneously. For purposes of this <br /> ordinance, steady state vibrations are vibrations <br /> -f _ which are continuous, or vibrations in discrete <br /> impulses more frequent than 60 per minute. <br /> - <br /> . - Discrete impulses which do not exceed 60 per <br /> - minute shall be considered impact vibrations. <br /> Maximum air blast vibration, measured at the <br /> lot lines of the zoning lot containing the <br /> extractive use, shall be 125 decibels on the -44. <br /> linear scale. • <br /> jo, : <br /> c) The Rehabilitation Plan shall be referred to the Orange <br /> County Soil and Water Conservation District for review <br /> . . <br />