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/O'T H t 1 WINE GROUP 13 January 2026 Mr. Johnnie Tucker California Regional Water Quality Control Board, Central Valley Region 11020 Sun Center Drive#200 Rancho Cordova, CA 95670 Subject: Response To: Report of Recent Inspection, Franzia Winery D.B.A. The Wine Group, San - Joaquin County Dear Mr. Tucker: The Wine Group (TWG) received the recent Report of Recent Inspection following the site visit from the Central Valley Regional Water Quality Control Board (CRWQCB) on 9 September 2025. The letter includes the following requirement. Additionally, as discussed immediately prior to the inspection, based on a review of the quarterly monitoring reports several of the groundwater monitoring wells have been reported as dry or as having insufficient water to sample for several quarters. Failure to maintain the groundwater monitoring network prevents you from complying with the monitoring and reporting requirements in Monitoring and Reporting Program 95-097. As agreed to, by 15 January 2026, please submit a Groundwater Monitoring Network Evaluation Report (Report) The Report shall evaluate if there is a sufficient number of groundwater monitoring wells that contain sufficient water to evaluate changes in water quality at the site. If the Report concludes that additional groundwater monitoring wells are necessary, then the Report shall include a Monitoring Well Installation Work Plan and proposed schedule to complete the work. TWG has conducted an initial review of the groundwater monitoring network information that is summarized in quarterly reports submitted to the CRWQCB. Attachment A shows the locations of the five existing groundwater monitoring wells at the site. Monitoring wells MW-3 and MW-5 have been dry since 2018, while MW-4 has been dry intermittently over the last several years. The figure below shows time duration on the X-Axis and groundwater elevation in feet above mean sea level (AMSL) on the Y- Axis for MW-3, MW-4, and MW-5. The figure also shows the elevation of the bottom of the screened interval for each well. This graph shows overall decline in water levels in the regional aquifer and TWG proposes to replace the three dry wells. The replacement wells will likely be located adjacent to the existing dry wells as the location of the existing network is appropriate to monitor groundwater upgradient and downgradient of the land application area. The replacement wells will have deeper screened intervals that will be determined based on water level information available for the regional aquifer.