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Brusca <br /> Associates, Inc. <br /> Environmental Engineering Geology <br /> December 20, 2023 <br /> Murphy Austin Adams Schoenfeld LLP <br /> Attention: Russell Austin <br /> 555 Capitol Mall, Suite 850 <br /> Sacramento, CA 95814 <br /> WORKPLAN <br /> INSTALLATION OF GROUNDWATER MONITORING WELLS <br /> ANDERSON BARNGROVER RANCH PROPERTY <br /> APN 091-030-130 <br /> 14290 East Comstock Road <br /> Linden, San Joaquin County, California <br /> Brusca Reference No. 260-004 <br /> INTRODUCTION <br /> In accordance with your request, we have prepared this Workplan for the installation of a <br /> network of groundwater monitoring wells to further evaluate groundwater impacts attributable to <br /> a former approximate 1,000-gallon diesel underground storage tank (UST) that was removed <br /> from the subject property in November 2022. The requirements for submittal a Workplan for <br /> additional site assessment and groundwater monitoring wells installation were presented in a <br /> letter by the Central Valley Regional Water Quality Control Board (CVRWQCB) dated <br /> December 12, 2023.1 The purpose of the planned groundwater monitoring wells is to evaluate <br /> the groundwater flow direction, plume stability, the extent of the plume to the west, and whether <br /> non-aqueous phase liquid (NAPL) is present. This Workplan presents a description of the <br /> planned groundwater monitoring well installation and initial sampling activities. This Workplan <br /> will be submitted to the CVRWQCB for review and approval prior to implementing the work. <br /> A Vicinity Map showing the location of the subject property is presented as Plate 1. A Site Map <br /> showing the layout of the entire subject parcel with respect to nearby roadways is presented as <br /> Plate 2. A map showing the onsite farm facility where the UST was formerly located along with <br /> past boring locations is presented as Plate 3. The inferred configuration of the diesel <br /> groundwater plume along with the locations of the planned groundwater monitoring wells is <br /> presented as Plate 4. <br /> 1 CVRWQCB; "Closure Denial and Request for Additional Assessment, Anderson-Barngrover Ranch, 14290 East <br /> Comstock Road,Linden, San Joaquin County;Case#292009, Global ID#T10000020864";December 12,2023. <br /> BruscaAssociates.com 9 P.O.Box 332,Roseville, CA 95661 9 Phone(916)677-1470 <br />