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trend in well AMW-1 suggests that active reductive dechlorination is occurring in the <br /> vicinity of these wells. <br /> 4.0 ANNUAL SUMMARY <br /> 4.1 GENERAL <br /> During the 2012 monitoring year, groundwater elevations and groundwater and surface <br /> water sampling was performed at the Forward Landfill on a quarterly basis. The <br /> groundwater and surface water samples were analyzed for the monitoring parameters <br /> summarized in Table 2-1, and a tabular summary of the 2012 annual monitoring data is <br /> provided in Appendix C. Time-series plots and piper diagrams depicting groundwater <br /> and surface water constituent concentrations,prepared by Herst, are presented in <br /> Appendix D. In addition, well hydrographs illustrating historical groundwater elevations, <br /> well screen elevations, and pump intake elevations are also included in Appendix D. <br /> According to the Forward Landfill Operations Manager, Forward Landfill received a total <br /> of 859,731 tons of solid waste during the 2012 monitoring year. Figure 1-2 shows the <br /> approximate location of waste placement during 2012 monitoring year. The following <br /> types of waste were received: <br /> Non-hazardous solid waste— 845,053 tons <br /> Asbestos—3,787 tons <br /> Sewage and wastewater treatment sludge— 10,891 tons <br /> 4.2 LANDFILL GAS MONITORING <br /> The CEHD performs monthly inspections at the Forward Landfill for methane <br /> concentrations in perimeter soil-pore gas probes. No perimeter gas probes exceeded the <br /> regulatory limit of 5 percent at the Forward Landfill during the 2012 monitoring year. In <br /> accordance with CCR 27, Section 20937(a) (1), methane monitors are installed in all <br /> buildings at the site to protect public health and safety and the environment. During the <br /> 2012 monitoring year, no methane was detected in any of the facilities buildings. <br /> .3 COMPLIANCE RECORD <br /> A NOV was issued during the May 18, 2012 inspection for the construction of a <br /> perimeter road within the buffer area which violated the terms and conditions of the solid <br /> waste facility permit. Forward corrected the NOV, and no other NOVs were noted <br /> during the monitoring year. <br /> .4 FORWARD UNIT <br /> Groundwater <br /> Groundwater elevations measured during the 2012 monitoring year were variable, <br /> reflecting seasonal precipitation patterns. The variable pattern in groundwater elevations <br /> c:\2012-0025\FA 4Q12.duc 14 Geo-Logic Associates <br />