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Kennedy/Jenks Consultants <br /> Section 1 : Introduction <br /> 1.1 Introduction and Objectives <br /> This Hydrogeologic Investigation and a Groundwater Sampling and Analysis Work Plan, Sutter <br /> Home Lodi Winery (Work Plan) is submitted by Kennedy/Jenks Consultants (Kennedy/Jenks) <br /> on behalf of Sutter Home Lodi Winery (Sutter Home) for Sutter Home's Westside Lodi Facility <br /> (herein referred to as the facility) located at 18667 Jacob Brack Road, Lodi in San Joaquin <br /> County, California (Figure 1). <br /> On 13 August 2009, the California Regional Water Quality Control Board (CRWQCB) issued <br /> Waste Discharge Requirements Order No. R5-2009-0073 (WDRs) for the facility. Provision 1 (d) <br /> of the WDRs requires a hydrogeologic investigation to further characterize shallow background <br /> groundwater quality and to evaluate the variability of groundwater quality. The objective of this <br /> Work Plan is to provide the scope and methods for an investigation to satisfy this requirement. <br /> 1.1.1 Assessment of Background Groundwater Quality <br /> Further assessment of background groundwater quality is needed to evaluate whether facility <br /> operations impact groundwater quality. State Water Resources Control Board (State Board) <br /> Resolution No. 68-16 requires an antidegradation analysis for an increased volume or <br /> concentration of waste. The antidegradation analysis comprises various considerations <br /> including background water quality. The facility is located in an area with a long history of <br /> agricultural activity (e.g., dairy production including land application of manure), such that <br /> background groundwater quality is influenced by historical, as well as on-going, offsite land <br /> uses. <br /> One objective of the proposed hydrogeologic investigation described in this Work Plan is to <br /> obtain groundwater data upgradient of the facility in order to estimate background groundwater <br /> quality. Spatial variability in upgradient groundwater quality as well as the direction of <br /> groundwater flow will be evaluated. The proposed hydrogeologic investigation will include <br /> examination of historical land use, nearby surface water bodies, and the potential that <br /> agricultural operations have impacted groundwater at or near the facility. Offsite conditions may <br /> change over time; therefore, the temporal variability in upgradient groundwater,quality will also <br /> be evaluated. <br /> The proposed hydrogeologic investigation will also evaluate baseline groundwater quality <br /> conditions for the expanded LAAs in order to assess impacts, if any, to groundwater quality from <br /> future process wastewater application. <br /> 1.1.2 Assessment of Variability in Groundwater Quality <br /> Groundwater data collected at the facility indicate that the groundwater quality is variable; <br /> however, the reasons for the variability are not fully understood. Probable causes of this <br /> variability in groundwater quality include the flat groundwater gradient, historical land use in the <br /> area, localized discharge of both high and low quality wastewater/stormwater, and leakage from <br /> Hydrogeologic Investigation and Groundwater Sampling and Analysis Work Plan, Page 1 <br /> Sutter Home Lodi Winery, Lodi, California <br /> g:Vs-ryaup�atlinnyo0I0810865005.�sNYrhame109tepMalwEr Wkalld hyft w plaftxtE <br />