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Kennedy/Jenks Consultards 2.2.2.2 Groundwater Sampling and Analysis Groundwater samples historically have been collected from the three groundwater monitoring wells. The constituents that were analyzed are: NO3 as N, total Kjeldahl nitrogen (TKN), total nitrogen (TN), TDS, fixed dissolved solids (FDS), volatile dissolved solids (VDS), pH, EC, Na, K, _ Cl, Ca, Mg, SO4,iron (Fe), boron (B), and phosphorus (P), and Table 7 summarizes available analytical results for the time period from November 1995 through April 2003. Figures 6 through 12 provide graphical representations of historical concentrations for various constituents of concern in groundwater. Monitoring wells MW-1, MW-2, and MW-3 are sampled on a quarterly basis. As specified in revised MRP Order No. 95-097, the following constituents are analyzed for groundwater monitoring: Nitrate as N, TKN, TDS, FDS, pH and standard minerals. 2.3 Offsite Groundwater Quality Although process water historically has been applied to land at the Facility's vineyards, other significant sources of the constituents of concern may also exist, such as releases at neighboring industrial or agricultural sites. Groundwater may also have been affected on a regional basis by common past agricultural and wastewater disposal practices. The purpose of this section is to discuss the strategy and methods and sources of information for evaluating the groundwater quality upgradient and downgradient of the Facility. This section provides a preliminary assessment of possible cause(s) of elevated constituent concentrations in groundwater at the Facility on the basis of review and evaluation of available information. In _ addition, this section outlines the rationale and proposed steps to continue to evaluate the offsite groundwater conditions. 2.3.1 Identify Offsite Land Owners and Land Uses Upgradient of Site The Preliminary Groundwater Evaluation Report identified and summarized nearby historical and/or existing sources or practices that may have contributed to elevated concentrations of constituents of concern. Graphical representations of concentrations of key constituents in groundwater indicate that the concentrations of EC, TDS, Mg, and Cl in the "upgradient"well MW-2 generally have risen since 1996 (Figures 6 - 10). The list presented below provides properties and businesses (by distance and direction from the Facility) that have been or are located nearby (within 3.2 miles of the Facility) based on information obtained from Environmental Database Resources, Inc. (EDR), an environmental database-records search firm. These properties have land use activities, permits, spills and/or violations that may be relevant to the proper identification and assessment of potential sources of groundwater degradation, if any. The locations of these properties and businesses are shown in Figure 13. • M.K.T. Farms located at 19171 East Mello Road, approximately 3 miles southeast. • Plant owned by M.K.T. Farms located at 18666 Mello Road, approximately 3 miles southeast. • Home ranch owned by Frank Miller Inc. located at 18800 Mello Road, approximately 3 miles southeast. Groundwater Protection Work Plan, The Wine Group Page 2-3 Franzia Winery, Ripon, California