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1.5 LANDFILL GAS MONITORING 0 Forward is currently installing additional landfill gas extraction wells, and working to optimize the efficiency of the landfill gas extraction system. During the fourth quarter 2006 monitoring period, methane was measured at concentrations less than five percent in perimeter soil -pore gas probes, suggesting that the landfill gas extraction system is effectively reducing methane concentrations along the perimeter of the Forward Landfill. A copy of the landfill gas monitoring probe data is provided in Appendix A. 2.1.1 Sampling and Laboratory Analyses During the fourth quarter 2006, depth -to -water measurements were recorded in all groundwater monitoring wells on November 27, 2006 and the groundwater monitoring wells were sampled by ATC Associates (ATC), on November 28, 2006. Surface water stations were inspected on November 28, 2006 and found to be dry, therefore, no surface water samples were collected. All lysimeters were inspected and a vacuum was set on each on December 1, 2006. The lysimeters were checked for soil -pore liquid on December 21, 2006, and samples were collected from lysimeters W-1, LY -A, LY -BG 1, and FU -03-1. A single sample set was collected from each point containing sufficient liquid and submitted to BC Laboratories, Inc. (BC) of Bakersfield, California, a state certified laboratory under contract to Forward. Samples were analyzed for the parameters stipulated in RWQCB Order No. R5-2003-0049. Table 2-1 summarizes site monitoring parameters, analytical methods, and monitoring frequency. Water quality samples were also analyzed in the field for dissolved oxygen, turbidity, temperature, specific conductance, and pH and recorded'on well data sheets. The groundwater monitoring wells, surface water monitoring points, and leachate monitoring points were sampled in accordance with the sampling and analysis procedures detailed in Appendix B. The well data sheets, laboratory data, certificates of analyses, and chain -of -custody records for the sampling program are included in Appendix C. The laboratory analyses and field results for groundwater monitoring wells, lysimeter and leachate sampling stations are summarized in Tables 2-2 through 2-6. 2.1.2 QA/QC Results The QA/QC program completed for the fourth quarter 2006 water quality monitoring event included analyses of four field blanks, four trip blanks, four laboratory method blanks, and one duplicate sample. The trip, field, equipment, and laboratory method blanks were analyzed for volatile organic compounds (VOCs) by EPA Method 8260. The results of the QA/QC program indicate that six VOCs (bromodichloromethane, • D:X2003_021\ForwardAostin_N16.doc\ 4 Geologic Associates