31B - CUP - 1901 NORTH FAIRVIEW ST

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City of Santa Ana Environmental Checklist The results of the attended short -term sound level measurements are summarized in Table 3 -14. As shown, the measured noise levels during daytime hours in and around the project site ranged from 61 to 63A- weighted decibels (dBA) equivalent continuous noise level (Leq). Table 3 -14. Existing Noise Volumes Regulatory Background: Noise Standards and Thresholds of Significance The proposed project is subject to the policies and standards contained in the Noise Element of the City of Santa Ana's General Plan and the City's Noise Ordinance. Table 1 of the City's General Plan Noise Element sets interior and exterior noise limits for residential land uses at 45 dBA and 65 dBA CNEL4, respectively. The City's General Plan Noise Element also requires that "all Residential uses should be protected with sound insulation over and above that 4 Community Noise Equivalent Level, is the average sound level over a 24 hour period, with a penalty of 5 dB added between 7 p.m. and 10 p.m. and a penalty of 10 dB added for the nighttime hours of 10 p.m. to 7 a.m. The Academy Charter High School June 2012 Initial Study /Mitigated Negative Declaration 3 72 1cF00914.11 M - •11 �� Distant Aircraft, Distant Children Noise Measurement Results Playing Measurement Period 3:35 (dBA) Site Measurement Strawberry Start Duration Lane and Sidney of Strawberry ID Location Date Time (mni:ss) Noise Sources LeQ1 Lalax LMi„ Lgo Lso L10 ST -1 Wintersberg 1/24/2012 1:20 10:00 Traffic along 68.5 75.6 52.1 61.5 67.6 71.4 School, 12752 Presbyterian Distant Aircraft, p.m. Fairview Street ST -5 Park Glen 1/26/2012 10:30 Church, 2000 Apartment p.m. Fait-view Complex 1811 Avenue, Distant Fairview Street Landscaping, Distant Aircraft ST -2 2229 Cotter 1/24/2012 2:36 10:00 Traffic along 59.0 69.6 48.4 50.8 56.9 62.5 Street p.m. Trask Avenue, Regulatory Background: Noise Standards and Thresholds of Significance The proposed project is subject to the policies and standards contained in the Noise Element of the City of Santa Ana's General Plan and the City's Noise Ordinance. Table 1 of the City's General Plan Noise Element sets interior and exterior noise limits for residential land uses at 45 dBA and 65 dBA CNEL4, respectively. The City's General Plan Noise Element also requires that "all Residential uses should be protected with sound insulation over and above that 4 Community Noise Equivalent Level, is the average sound level over a 24 hour period, with a penalty of 5 dB added between 7 p.m. and 10 p.m. and a penalty of 10 dB added for the nighttime hours of 10 p.m. to 7 a.m. The Academy Charter High School June 2012 Initial Study /Mitigated Negative Declaration 3 72 1cF00914.11 M - •11 �� Distant Aircraft, Distant Children Playing ST -3 2706 1/24/2012 3:35 10:00 Traffic along 53.4 67.4 44.3 45.3 48.3 56.9 Strawberry p.m. Strawberry Lane (Corner Lane and Sidney of Strawberry Street Lane and Sidney Street ST -4 Leroy L. Doig 1/26/2012 8:5S 10:00 Traffic along 59.7 682 49.5 51.3 56.1 64.3 Intermediate p.nl. Trask Avenue, School, 12752 Distant Aircraft, Trask Avenue Birds ST -5 Park Glen 1/26/2012 10:30 10:00 Traffic on 56.6 67.4 48.5 50.3 53.4 56.1 Apartment p.m. Fait-view Complex 1811 Avenue, Distant Fairview Street Landscaping, Distant Aircraft r The 10- minute duration, energy - averaged noise level Leq is commonly accepted as being representative of a 1 -hour average in urban and suburban environments. It is used as the basis for community noise equivalent level calculations. Regulatory Background: Noise Standards and Thresholds of Significance The proposed project is subject to the policies and standards contained in the Noise Element of the City of Santa Ana's General Plan and the City's Noise Ordinance. Table 1 of the City's General Plan Noise Element sets interior and exterior noise limits for residential land uses at 45 dBA and 65 dBA CNEL4, respectively. The City's General Plan Noise Element also requires that "all Residential uses should be protected with sound insulation over and above that 4 Community Noise Equivalent Level, is the average sound level over a 24 hour period, with a penalty of 5 dB added between 7 p.m. and 10 p.m. and a penalty of 10 dB added for the nighttime hours of 10 p.m. to 7 a.m. The Academy Charter High School June 2012 Initial Study /Mitigated Negative Declaration 3 72 1cF00914.11 M - •11 ��