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1 <br /> SWT Engineering (SWT) is pleased to present the Site Characterization Work Plan (Work <br /> Plan) to the regulatory agencies identified below in support of a proposed Solar Panel <br /> Project on the closed Riverbank City Dump (SWIS No. 39-CR-0029). <br /> 1.0 BACKGROUND <br /> The entire 657 kW project consists of one 92.365-kW carport that is to be constructed over <br /> an area that was not used as a landfill and one 565-kW ballasted ground mount array to be <br /> placed on the old landfill area (Figure 1). The entire system would be located on the south <br /> end of the City of Riverbank Wastewater Treatment Plant (WWTP) property and potential <br /> disposal area (review of records section below), north of the Stanislaus River (Figure 2). The <br /> parcel the site is listed from the County of San Joaquin Assessor's parcel map register is <br /> listed as Assessor's Parcel Number (APN) 247-26-002. <br /> The Riverbank City Dump (Site) is a closed solid waste disposal site subject to California <br /> Department of Resources Recycling and Recovery (CalRecycle) regulations and is inspected <br /> periodically by the San Joaquin County Local Enforcement Agency (LEA) for compliance with <br /> applicable State Minimum Standards. The Solar Panel Project will require a Postclosure <br /> Land Use (PCLU) Plan to be submitted to the San Joaquin County Solid Waste Local <br /> Enforcement Agency (LEA) and the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) for review and approval. To support the PCLU Plan, a Site Characterization Work <br /> Plan needs to be completed. <br /> As part of a meeting held with the LEA in June 2023, the LEA indicated that the first step in <br /> this project would be preparation and submittal of a Work Plan to conduct a Site <br /> Characterization Report for the closed Riverbank City Dump for the regulatory agencies (i.e., <br /> LEA, CalRecycle, and CVRWQCB). The agencies would review and provide feedback with the <br /> goal of obtaining regulatory agency concurrence on the Site Characterization approach. <br /> CalRecycle guidance for site investigations and PCLU Plans used for this Work Plan include: <br /> ♦ Young, Glenn, P.E., July 2019, Landfill Development Requirements and <br /> Recommendations, CalRecycle, Closed, Illegal, and Abandoned Sites Program. <br /> ♦ Former Landfill and Disposal Site Investigations, 2020, California Department of <br /> Resources Recycling and Recovery (CalRecycle), Closed, Illegal, and Abandoned <br /> Sites Program, Publication #DRRR-2010-008. <br /> 2.0 AVAILABLE RECORDS <br /> SWT reviewed CalRecycle's Solid Waste Information System (SWIS) database and discussed <br /> with the LEA records for the Site. There are very few regulatory records and no documented <br /> history or record of previous investigations regarding the Site. LEA inspection reports were <br /> reviewed in addition to a completed Site Identification Form, dated June 20, 2011. The <br /> following historical aerial photographs were compiled and reviewed from online sources: <br /> ♦ 1957 March University of California at Santa Barbara (UCSB) <br /> ♦ 1957 July UCSB <br /> ♦ 1963 (Unknown Month) UCSB <br /> ♦ 1969 UCSB <br /> Site Characterization Work Plan SWT Engineering <br /> Z:\PROJECTS\SiteLoglQ\Site Characterization Work Plan\Text\Riverbank_Site Charac.Work Plan_072823.doc <br />