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operation, it is recommended that the applicant be required to install aleft-tum lane on Louis Avenue as a condition of approval. The County Department of Public Works recommends that the improvements and permits within the City of Manteca's portion of Louise Avenue be as required by the City. Noise The applicant has indicated that the loudest machine will not produce sound levels greater than 50 dB at the property line. County noise performance standards require that sound levels be below 70 dB at the property line during the day and 65 dB during the night. In a graduated scale (see Table 9-1025.9 of the Development Title, attached), noise levels at the property line may not exceed 50 dB for over 30 minutes in any hour during the daytime and 45 dB for over 30 minutes in any hour during the nighttime. The project must meet the County's noise performance standards. The nearest noise receptors are the offices of the Manteca Un Pied School District located adjacent to this site on the east. Other potentially sensitive noise receptors include residences to the northeast, east, west, and the agricultural land to the south, which is designated for residential development in the City of Manteca's General Plan. The nearest residence is approximately 1/3 mile from the existing buildings. Projected 2005 noise contours for Louise Avenue indicate 70 dB CNEL at 123 feet from the edge of pavement. Because this project must meet County noise performance standards, and because this project is not likely to produce noise greater than the noise from Louise Avenue, this project is not expected to have a significant noise impact. Dust/Air Quality Because County Ordinance requires that all processing be done indoors, dust will be kept to a minimum. The vermiculture operation and wholesale nursery require moisture and are not likely to generate significant levels of dust. In addition, water trucks will be on the site to reduce dust from wind rows. Parking and major circulation areas will be paved. Trailer storage areas will be graveled, and minor use areas will be chip sealed. The San Joaquin Valley Unified Air Pollution Control District noted that a Negative Declaration is appropriate from an air quality perspective. The District noted that air impacts will be associated with the construction phase of the project and provided the applicant with applicable regulations. Stormwater Drainage The applicant is proposing natural or existing drainage. The applicant has indicated that some of the drainage now flows into the South San Joaquin Irrigation District Drainage Canal on the west side of the project site. The District has stated that the applicant will not be allowed to discharge drain water of any kind into District facilities without approval of the District. The applicant has been informed that obtaining approval from the District is not assured. If terminal drainage is not available, any increase in drainage caused by new development shall be retained on the site. San Joaquin County UP-95-8/Rouse Community Development Page 6