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INITIAL STUDY (ATTACHMENT A) PA-1600212 Sanchez/Harvest Power(c/o Baumbach & Piazza) PROJECT DESCRIPTION: A Use Permit application for the expansion of an existing composting facility that processes urban green waste, wood, and agricultural residue to include the composting of commercial food and dilgestate. The prosect includes an increase in the processed tonnage from 156,000 tons per year to 182,000 tons per year and an increase in the protect area from 20 acres to 40 acres. The proiect also includes the construction of a second truck scale near the egress driveway for trucks. The existing truck scale, silo, shed, office, and scale house will remain on-site. No now structures are proposed. (Use Type: Major Impact Services). The property has General Plan designations of General Agriculture (A/G), and a zoning of General Agriculture with a 40-acre minimum (AG-40). There was a Previously approved Mitigation Monitoring Plan (Attachment B) for the existing facility. The proposed project will be subject to the Mitigation Monitoring Plan, and all previous conditions of Use Permit application No. PA-1200011 will still apply. The parcel is located on the south side of W. Frewert Road, 6,600 feet west of Manthey Road, north of Lathrop. Environmental Issues 1. Water 1. a. The project site is located in the Flood Zone X Protected By Levees flood designation and may contain potential wetlands. The project has been referred to the Army Corps of Engineers {ACOS) and the Department of Public Works (PW). If approved, any new development will have to comply with Development Title Section 9-1605 regarding flood hazards and shall comply with any regulations from the ACOE regarding wetlands. In addition, the project has been referred to the Central Valley Regional Water Quality Control Board (CVRWQCB), the Environmental Health Department(EHD), and the San Joaquin County Mosquito and Vector Control District for review. This project shall be required to comply with the CVRWQCB, EHD, and San Joaquin County Mosquito and Vector Control District regulations regarding groundwater and surface water to ensure that there is no impact from the project. Development Title Section 9-1135 also requires that stormwater created by the project shall be retained on-site and not flow onto neighboring properties. 2. Earth 2.c. The Soil Survey of San Joaquin County classifies the soil on the parcel as Bisgani loamy coarse sand, partially drained, 0 to 2 percent slopes and Grangeville clay loam, partially drained, 0 to 2 percent slopes. Bisgani loamy coarse sand's permeability is rapic and available water capacity is low. This unit is suited to irrigated row and field crops. Bisgani loamy coarse sand has a storie index rating of 30 and a land capability of lVw if nonirrigated and lllw if irrigated. Grangeville clay loam's permeability is moderately rapid and available water capacity is moderate. This unit is suited to irrigated row and field crops. Grangeville clay loam has an average storie index rating of 65 and a land capability of lVw if nonirrigated and 11w if irrigated. This project site will encompass a 40-acre parcel,which currently has an existing 20-acre composting facility for processing urban green waste, wood and agricultural residue with four(4) accessory buildings and one (1)truck scale. The surrounding land uses are primarily agricultural with scattered residences, and the Zoning and General Plan for the project site will continue to Initial Study -7- Rev 5-00