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4.Environmental Analysis _ TABLE 4.5-2 _ LONG-TERM NOISE MONITORING DATA Noise Levels (dBA) Friday Saturday Sunday LocationfStatistical Descriptors September 5 September 6 September 7 Measurement A: Near Residence on Blewett Road^ L.Nighttime 10 PM-7 AM(not penalized) 48 48 43 L.Daytime 7 AM-10 PM 58 46 49 L.Evening Commute Peak-Hour 4 PM-6 PM 45 43 48 L,24-Hour 57 47 47 DNL: 10 dBA penalty for noise between 10 PM and 7 AM 58 54 51 CNEL: 5 dBA penally for noise between 7 PM and 10 PM and 58 54 51 10 dBA penalty for noise between 10 PM and 7 AM Wednesday Thursday Friday September 10 September 11 September 12 Measurement B: Koster Road Bridge over Delta-Mendota Canalb L,Nighttime 10 PM-7 AM(not penalized) 51 51 52 L,Daytime 7 AM-10 PM 54 54 52 — Lea Evening Commute Peak-Hour 4 PM-6 PM 53 52 51 L,24-Hour 53 53 52 DNL: 10 dBA penalty for noise between 10 PM and 7 AM 58 58 58 CNEL: 5 dBA penalty for noise between 7 PM and 10 PM and 58 58 58 10 dBA penalty for noise between 10 PM and 7 AM Locations correspond to those illustrated in Figure 4.5-2. _ Noise measurement data presented here reflects hourly averages collected at this location in September of 2003, using a Type 2,Metrosonics dB-308 sound level meter,calibrated prior to use. SOURCE: Environmental Science Associates,2003 • Result in exposure of persons to or generation of noise levels in excess of standards _ established in any applicable San Joaquin County plan or noise ordinance, or applicable MSHA standards. • Result in a substantial permanent increase in ambient noise levels in the project vicinity — above levels existing without the project. • Result in a substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project. RMC Pacific Vernalis Quarry Mining and Reclamation Project 4.5-10 ESA!203015 Draft Environmental Impact Report May 2006