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GAVIN NEWSOM <br /> ;OVFRNOR <br /> e•trewwA YANA GARCIA <br /> W SECRETARY FOR <br /> Water Boards <br /> ENVIRONMENTAL PROTECTION <br /> Central Valley Regional Water Quality Control Board <br /> 5 February 2025 <br /> And erson-Barngrover Ranch Company <br /> Go David Taylor <br /> 1997 Calusa Trail <br /> Middleburg, FL 32068 <br /> REQUEST TO COMPLETE MONITORING WELL INSTALLATION; <br /> ANDERSON-BARNGROVER RANCH, 14290 EAST COMSTOCK ROAD, LINDEN, <br /> SAN JOAQUIN COUNTY; CASE #392009, GLOBAL ID #T10000020864 <br /> Central Valley Water Board staff (Staff) reviewed the Work Plan for Installation of <br /> Additional Groundwater Monitoring Well (Work Plan) dated 24 January 2025. This <br /> document was submitted on your behalf by Brusca Associates Inc. (Brusca) for the <br /> And erson-Barngrover Ranch underground storage tank (UST) petroleum release case at <br /> 14290 East Comstock Road in Linden (Site). <br /> In the Work Plan, Brusca proposes to install a groundwater monitoring well (MW-4) <br /> approximately 570 feet west of existing Site well MW-3. The proposed location is <br /> approximately 190 feet east of an agricultural irrigation supply well (Ag Well) on the <br /> adjacent property. Brusca proposes installing MW-4 in order to delineate the plume to the <br /> west and as a sentry well for petroleum hydrocarbons migrating west toward the Ag Well. <br /> Brusca proposes to install the well as follows: <br /> Time between Time between <br /> Sand development <br /> Well Total Screened Pack Bentonite Soil Sampling installation and <br /> Depth Interval Thickness and <br /> Interval development groundwater <br /> sampling <br /> ftbs) I (ftbs ft ftbs hours hours <br /> 5-80 <br /> MW-4 80 60-80 58-80 1-2 (5ft intervals, >_72 >_24 <br /> litholo onl <br /> ft= feet; bgs= below ground surface; >_= greater than or equal to <br /> Staff concurs. By 9 May 2025, please complete the well installation, development, and <br /> sampling and submit a well installation report. <br /> In a 16 January 2025 directive letter, Staff requested that you submit a well installation <br /> work plan and an evaluation of the risk to Main Well from the Site release by <br /> MARK BRADFORD, CHAIR I PATRICK PULUPA, EsQ., EXECUTIVE OFFICER <br /> 11020 Sun Center Drive#200, Rancho Cordova,CA 95670 1 www.waterboards.ca.gov/centralvalley <br />