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12803301 2.1.3 Monitoring Times The noise monitoring was performed at two different times during a 30- day period. The first monitoring event occurred on September 11, 2002, and the second monitoring event occurred on October 1, 2002. 2.1.4 Monitoring Methods Sound level meters (SLM) were positioned at each monitoring location. The instrument height was approximately five feet above the ground. The SLM monitored sound levels using an "A"weighting and the slow meter response. The meters were calibrated before and after each monitoring event. 2.2 Particulate Sampling and Visual Observation 2.2.1 Applicable Regulations According to LEA Conditions provided in the permit for the MRF, the operator will monitor for dust to verify compliance with State minimum standards. According to the San Joaquin County Environmental Health Department the State standard is provided in 14 CCR 17407.4, which states: "The operator shall take adequate measures to minimize the creation, emission, or accumulation of excessive dust and particulates, and prevent other safety hazards to the public caused by obscured visibility." To help quantify the requirements of 14 CCR 17407.4, PM10 monitoring was conducted. The State PM10 standard for ambient air quality is 50 micrograms (averaged over a 24-hour period) of particulate, with an aerodynamic diameter of 10 microns or less, per cubic meter of air (µg/M). 2.2.2 Sampling Locations Four PM10 monitoring locations were selected along the property lines nearest the (MRF). The monitoring locations are shown in Figure 2 (see Appendix A). 2.2.3 Sampling Times The 24 hour samples were collected twice within a 30-day period on a day when the MRF activity was at or above normal. Noise,Particulate,and Vibration Report WM-CVWS Project 128-03 Page 3 October 30,2002