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Water Quality Monitoring Report Forward Landfill ® 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 D. The well data sheets, raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are included in Appendix E. 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 E. 2.1.2 QA/QC Results The quality assurance/quality control (QA/QC) program completed for the first quarter 2015 water quality monitoring event included analyses of laboratory method blanks, and one duplicate sample (MW-14). The 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 method blanks. Inorganic constituents including calcium, magnesium, and sodium were measured at trace concentrations in method blanks analyzed with groundwater samples. However, at these very low concentrations, these constituents did not affect the interpretation of primary sample ® results. The results of the duplicate sample collected from well MW-14 yielded good correlation with a relative percent difference (RPD) of seven percent or less for quantifiable results. Review of the sampling dates and laboratory analytical certificates indicates that 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 first quarter 2015 monitoring period are acceptable and the water quality samples collected from the Forward Unit appear to be representative of water quality at the site. 2.1.3 Groundwater Elevations and Contours Prior to purging and sampling, each well was sounded for water depth using a weighted electronic sounder to an accuracy of 0.01 foot, and the static water level was recorded on a Well Data Sheet (Appendix E). The groundwater elevations were calculated for each well by subtracting the depth-to-water measurement from the top-of-casing reference elevation. The current groundwater elevation data for the Forward Unit is summarized in Table 2-3. The groundwater elevation data obtained on February 23, 2015, were used to generate the groundwater elevation contour map shown on Figure 2-1 for the first quarter 2015 monitoring period, which indicates that groundwater beneath the eastern and southeastern portions of the Forward Unit flows to the northwest at a hydraulic gradient of 0.002 ft/ft; groundwater beneath the southwestern and central portions of M:\2015.0014\FA 1Q15.docx 5 4/27/2015,Rev.0