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Kennedy/Jenks Consultants Chapter 2: Groundwater Characterization Work Plan This work plan presents an outline for characterization of groundwater at The Wine Group and was prepared by Kennedy/Jenks in response to Item 2.a of the CAO. 2.1 Introduction The objective of Chapter 2, the Groundwater Characterization Work Plan (GWC Work Plan) is to describe a plan to evaluate the quality of water upgradient, beneath, and downgradient of the Facility, and to protect the beneficial uses of groundwater and satisfy the provisions of WDR No. 95-097 (CRWQCB, 1995A), MRP Order No. 95-097 (CRWQCB, 1995B), and the Revised MRP Order No. 95-097 (CRWQCB, 2001). The GWC Work Plan includes a compilation of the onsite and offsite groundwater data, a plan for acquiring additional water quality data both onsite and offsite, and an overview of the reports that will be prepared to present the results of the investigations. 2.2 Onsite Groundwater Quality The purpose of this section is to discuss the strategy and methods and source of information for evaluating the groundwater quality beneath the Facility. Onsite groundwater quality data and subsurface stratigraphic information are derived from production, irrigation, and monitoring wells that are located at the Facility. The available information is briefly summarized below. 2.2.1 Production and Irrigation Wells Five production wells currently exist at the Facility; the locations of these wells are shown in Figure 2. Production well numbers (Nos.) 1, 2, 3, and 5 are currently producing groundwater, while production well No. 4 is no longer used at the Facility. Production well No. 1 supplies the majority of the Facility's water needs. The Facility has water meters to measure water usage. Production well water is used mainly for wine production processes and for sanitation of equipment, floors, and process areas. Drinking water for the Facility consists of bottled water supplied by The Wine Group. Prior to use for winemaking processes, production well water that is relatively hard (Total Hardness ranging from 180 mg/I to 910 mg/I as CaCO3) is softened utilizing various sodium cation exchangers. Water supply produced from Well No. 2 is treated prior to use with granular activated carbon contained in pressure vessels. In addition, there are five irrigation wells (40A, 4013, 41, 42, and 43) that are used for vineyard irrigation, as needed. 2.2.1.1 Well Construction Details Table 2 highlights pertinent construction details for nine wells at the Facility that were drilled during the period from 1951 to 1992. The wells are equipped with 8- to 14-inch diameter casings Groundwater Protection Work Plan, The Wine Group Page 2-1 Franzia Winery, Ripon, California � s9-Wadmii!j;E "+v 1 ].,r�ey iG �'"P✓L.woYryannai�zttla