CORRESPONDENCE_2007-2012 - Laserfiche WebLink

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Supplemental Noise Analysis: Wood Grinding: In 1993, an analysis concluded that there was 73 dBA at 250 feet for a wood grinder, or 52 dBA at the residencies at 600 feet away, and that there were no impacts or mitigation needed. Today, the nearest wood grinder is 840 feet to a residency, which is greater than 600 feet, where the noise should be lower than 52 dBA. Based on General Plan Update underway, 70 dB Ldn is considered normally acceptable for agricultural and industrial lands, and 80 dB Ldp, is considered conditionally acceptable for agricultural and industrial lands. Today, there still would be no impacts or mitigation needed. MRF Expansion: The MRF Expansion will be enclosed down in the gravel pit, where the 1993 EIR concluded and that there were no impacts or mitigation needed for an enclosed MRF. Today, there still would be no impacts or mitigation needed. Mixed C&D Processing: The proposed activity would be the relocation of the mixed C&D Processing Facility to the south of the MRF as shown on the Study Map, about 2,500 feet from the nearest residency. The greater amount of noise from C&D Processing would be the associated wood grinding activity there. In 1993, an analysis concluded that there was 73 dBA at 250 feet for a wood grinder, or 52 dBA at the residencies at 600 feet away, and that there were no impacts or mitigation needed. Today, the nearest wood grinder is 2,500 feet to a residency, which is greater than 600 feet, where the noise should be lower than 52 dBA. Based on General Plan Update underway, 70 dB Ldn is considered normally acceptable for agricultural and industrial lands, and 80 dB Ldn is considered conditionally acceptable for agricultural and industrial lands. Today, there still would be no impacts or mitigation needed. Inert Processing: Current activity includes concrete crushing that has been underway for years, such as occurring at the aggregate mining/inert crushing companies to the north and west, as shown on the attached Noise Study Map, which is 1,180 feet to the nearest residency. The Lonestar Aggregate Plan in Sacramento has noise levels of 59.5 dBA at 1,200 feet up to 10:30 pm at night. Based on the General Plan Update underway, 70 dB Ldn is considered normally acceptable for agricultural and industrial lands, and 80 dB Ldn is considered conditionally acceptable for agricultural and industrial lands. Today, at less than 60 dBA, there still would be no impacts or mitigation needed. Mobile equipment has mufflers to minimize noise impacts. Inert processing equipment used at the facility meets OSHA standards for noise and safety. Ear protection devices are worn by all employees subject to excessive noise levels in the facility.