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Water Quality Monitoring Report Forward Landfill 2.0 FORWARD UNIT 2.1 Water Quality Monitoring 2.1.1 Sampling and Laboratory Analyses During the fourth quarter 2017, Del-Tech Geotechnical Support Services (Del-Tech) measured depth-to-water (DTW) from all Forward Unit wells on November 9, 2017. Samples were collected from all Forward Unit wells, between November 9 and 13, 2017; the compost facility retention basin and leachate pond were sampled on November 10, 2017; and pan lysimeters were sampled on December 30, 2017. Of note, surface water monitoring stations were checked on multiple occasions and reported dry during the monitoring period. Samples were collected by Del-Tech from each sample point containing sufficient liquid and submitted to BC Laboratories (BC) of Bakersfield, California, a state certified laboratory under contract to Forward. The fourth quarter 2017 samples were analyzed for the monitoring parameters stipulated in RWQCB Order No. 115-2014-0006. Table 2-1 summarizes site monitoring parameters, analytical methods, and monitoring frequency. Water quality samples were also analyzed in the field for oxygen reduction potential (ORP), turbidity, temperature, specific conductance, and pH and recorded on well data sheets. The groundwater monitoring wells and leachate monitoring points were sampled in accordance with the sampling and analysis plan detailed in Appendix E. The well data sheets, raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix F. Field and laboratory analyses are summarized in Tables 2-2 through 2-7 and cumulative tabulated data for all monitoring points and constituents for groundwater, unsaturated zone, leachate, and surface water are presented in Appendix F. 2.1.2 QA/QC Results The quality assurance/quality control (QA/QC) program completed for the fourth quarter 2017 water quality monitoring event included analyses of two trip blanks, one equipment blank, one field blank, laboratory method blanks, and one duplicate sample (MW-3). The blank samples were analyzed for VOCs by EPA Method 8260 and method blanks were analyzed for all of the analytes included in the monitoring program. The results of the QA/QC program indicate that no VOCs were detected in the trip, field, equipment, or method blanks. Inorganic constituents (calcium, magnesium, potassium, and sodium) were measured at estimated trace concentrations in one or more of the method blanks analyzed with groundwater samples. However, these inorganic constituent concentrations did not affect the interpretation of primary sample results. The results of the duplicate sample collected from well MW-3 (Table 2- 2) yielded good correlation with a relative percent difference (RPD) less than 6 percent. Review of the sampling dates and laboratory analytical certificates indicates that with the exception of nitrate as nitrogen in a lysimeter sample, all laboratory analyses were completed within required holding times. Based on the results of the laboratory QA/QC analyses, it is concluded that the laboratory data generated for the fourth quarter 2017 monitoring period are /0 Project No.5017.1030 I Water Quality Monitoring Report 5 January 2018