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To quantify the existing ambient noise environment at these two representative locations, continuous ambient noise level measurements were conducted at Sites A and B (Figure 1) from September 27 through October 2, 2008, Larson Davis Laboratories (LDL) Model 820 precision integrating sound level meters were used for the ambient noise level measurement survey. The meters were calibrated before and after use with an LDL Model CAL200 acoustical calibrator to ensure the accuracy of the measurements. The equipment used meets all pertinent specifications of the American National Standards Institute. The results of the ambient noise measurement survey are summarized in Table 5. The data presented in Table 5 data are provided as averages over the entire daytime and nighttime periods to reflect an overview of the ambient noise environment for those time periods, However, because the County's noise standards are qualified in terms of one-hour periods for Leq and individual single-events for Lmax, a complete listing of the tabular ambient noise measurement results and a graphical representation of those data are provided in Appendices A & B, respectively, for each individual hour of the noise surveys. Table 5 Continuous Ambient Noise Monitoring Results Nearest Residences to Munn & Perkins Project Site September 27 through October 2, 2008 Daytime (7 am to 10 pm) Nighttime (10 pm to 7 am) Average Maximum Average Maximum Location Date (Leq) (Lmax) (Leq) (Lmax) Ldn Site A September 27 45 69 45 67 51 September 28 43 62 45 70 51 September 29 45 70 42 70 49 September 30 50 67 45 68 52 October 1 51 77 46 69 53 October 2 - with harvest 61 82"' 43 68 60 October 2 - w/o harvest 46 68 43 68 50 Site B September 27 50 71 46 70 53 September 28 48 67 47 72 53 September 29 50 81 44 72 52 September 30 55 75 46 70 55 October 1 56 88 46 71 56 October 2 - with harvest 74 104" 45 74 72 October 2 -w/o harvest 48 73 45 72 52 Source: Bollard Acoustical Consultants, Inc. Noise measurement locations are identified on Figure 1. Noise level data shown are averages for each site. A-Note that a very high noise level was registered at this location on October 2 (104 dB) This is believed to be due to local harvesting activities occurring in the almond orchards near the noise level meter. Environmental Noise Analysis Munn &Perkins Expanded Hours of Operations—Sao Joaquin County Page 12