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Water Quality Monitoring Report Forward Landfill 1.0 INTRODUCTION On behalf of Forward Inc. (Forward), this report presents water quality monitoring data generated during the fourth quarter 2017 monitoring period for the Forward Landfill in San Joaquin County, California. This report also presents an annual summary for the site. Monitoring was performed in accordance with requirements listed in the Central Valley Regional Water Quality Control Board (RWQCB) Order No. 115-2014-0006. For reporting purposes,the water quality monitoring network consists of two units: the Forward Unit and the Austin Unit. Section 1 provides a description of the monitoring network, site inspections, and standard observations; Sections 2 and 3 include discussions of water quality data for the Forward and Austin Units, respectively. 1.1 Monitoring Network The water quality monitoring network at the Forward Unit currently includes 15 groundwater monitoring wells (five of which are dual depth well pairs), one domestic well, two surface water monitoring stations, and 10 lysimeters (Figure 1-1). Monitoring wells at the Forward Unit have been constructed to monitor groundwater at the facility as follows: FORWARD UNIT GROUNDWATER MONITORING NETWORK MONITORING POINT MONITORING POINT I.D. Groundwater Monitoring MW-22,MW-23R,MW-24 Wells—Background Groundwater Monitoring MW-1A/13,MW-2A/B,MW-3A/B,MW-10, MW-13A/13, MW-14A/13, Wells—Compliance MW-15, MW-16,MW-17,MW-18,MW-19,MW-21 Domestic Well DW-9690 Piezometers* MW-1B,MW-2B,MW-36,MW-1313,MW-14B Surface Water Stations FSW-1, FSW-2 Lysimeters E-1, E-2,W-1,W-2, LY-A,LY-BG1, D-93A,WMW-D-01N, WMW-D-01S,WMW-D-02 Note: * Piezometers are sampled in the event that the"A"well in the dual depth well pairs is dry. As presented on the following table, the monitoring network at the Austin Unit currently includes 35 groundwater monitoring wells, two domestic wells, two surface water monitoring stations, and seven lysimeters (Figure 1-1). The detection monitoring program (DMP) wells are used to detect for a potential release from the landfill, while the corrective action program (CAP) wells are used to evaluate changes in water quality and the effectiveness of the corrective action measures. Project No.5017.1030 I Water Quality Monitoring Report 1 January 2018