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Ll <br />A comparison of the 1993 EIR and the proposed Expansion Plan is listed below, along with the <br />proposed policies of the San Joaquin County General Plan Update <br />Issue <br />San Joaquin County General Plan — <br />Noise Section <br />Noise Environment <br />1993 EIR <br />Based on 2010 General Plan: <br />65 dB Ldn or less is considered <br />acceptable for residential <br />development. Minimize noise <br />impacts on neighboring noise <br />sensitive areas <br />2010 Expansion <br />Based on General Plan Update <br />underway: <br />70 dB Ldn is considered normally <br />acceptable for agricultural and <br />industrial lands. <br />80 d6 Ldn is considered conditionally <br />acceptable for agricultural and <br />industrial lands. <br />The current General Plan update provides additional threshold values up <br />to 80 dB Ldn as being conditionally acceptable. The area is zoned General <br />Agricultural where 80 dB Ldn as being conditionally acceptable. <br />Gravel operations, truck traffic, <br />and general aviation <br />Summary of 15 -minutes Ambient Varies up to 63 dB Ldn <br />Noise measurements <br />Significance criteria <br />Impacts <br />Mitigation <br />Noise at 55 dB Ldn at the two <br />mobile homes 600 feet to the <br />north. <br />Increase in traffic noise of 3 <br />dB Ldn if residency exceeds 65 <br />d6 Ldn. <br />Increase in transportation <br />noise of 5 dB Ldn if residency <br />exceeds 65 dB Ldn. <br />Construction noise exceeding <br />60 dB Ldn. Outside a residency. <br />73 dBA at 250 feet for a wood <br />grinder, or 52 dBA at the <br />residencies at 600 feet away <br />Traffic noise up 1 dBA during <br />peak hour <br />Construction activity <br />No mitigation was required or <br />recommended for wood <br />grinding <br />No mitigation was required or <br />recommended for traffic <br />No mitigation was required or <br />recommended for <br />construction activity <br />Same as 1993, with processing of <br />materials similar to gravel <br />operation in heavy equipment <br />None taken. <br />Based on General Plan Update <br />underway: <br />• 65dBA for transportation <br />noises upon sensitive receptors <br />• 50 dBA for stationary sources <br />at outdoor activity up to 10 pm <br />at night, and 45dBA from 10 <br />pm to 7 am, near noise - <br />sensitive uses. <br />• The nearest wood grinder is <br />840 feet to a residency. At 600 <br />feet, the noise level is 52 dBA. <br />• Same <br />• Same <br />• Same <br />• Same <br />• Same <br />