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1.0 Surface Water Monitoring
<br /> During the third quarter 2009 monitoring event, surface water monitoring was performed at the
<br /> Austin Road Landfilll by ATC Associates, Inc. Littlejohns Creek was sampled at background
<br /> (upstream) monitoring point ASW-1. Downstream monitoring point ASW-2 was dry during the
<br /> third quarter 2009 monitoring event. Surface water samples are scheduled to be analyzed
<br /> quarterly for field parameters (pH, specific conductance, temperature, and turbidity) and
<br /> monitoring parameters (bicarbonate, calcium, carbonate, chemical oxygen demand [COD],
<br /> chloride, magnesium, nitrate, oil and grease, potassium, sodium, sulfate, total dissolved solids
<br /> [TDS], total organic carbon [TOC], and volatile organic compounds [VOCs])when surface water
<br /> is present.
<br /> The field results provided by ATC Associates, Inc. and laboratory results provided by BC
<br /> Laboratories, Inc. for the third quarter 2009 surface water monitoring event are summarized on
<br /> Table 2.1. The historical surface water data are presented in Appendix A. Times series
<br /> concentration plots of historical surface water data are presented in Appendix B.
<br /> There were no VOCs detected at surface water monitoring point ASW-1 during the third quarter
<br /> 2009 monitoring event.
<br /> Historical data from the surface water monitoring points were evaluated for temporal trends using
<br /> Sen's Slope trend analysis. Graphs and summary table of the Sen's Slope analyses for surface
<br /> water monitoring points are presented in Appendix B. There were no constituents that exhibited
<br /> a statistically significant upward trend. Sen's Slope analysis identified decreasing trends in
<br /> chloride at ASW-1, chemical oxygen demand at ASW-1, nitrate at ASW-2, field specific
<br /> conductance at ASW-1,TDS at ASW-1 and ASW-2, and TOC at ASW-1.
<br /> Site personnel reported that soil cover has been placed over the waste material to prevent ponding
<br /> of stormwater and to protect surface water. In addition, down drains and a perimeter ditch direct
<br /> stormwater to a basin in the southwest corner of the site. Inspection and maintenance procedures
<br /> for these stormwater control structures are provided in the site's Stormwater Pollution Prevention
<br /> Plan,prepared by CH2M Hill and revised June 1997.
<br /> 2.0 Groundwater Monitoring
<br /> During the third quarter 2009 monitoring event, groundwater detection monitoring and corrective
<br /> action monitoring were performed at the Austin Road Landfill by ATC Associates, Inc.
<br /> Monitoring well AMW-2, which is upgradient from the landfill, is the designated background
<br /> well. Monitoring wells AMW-6, AMW-7, AMW-12, AMW-13, and AMW-14 are currently
<br /> designated as detection monitoring wells. Monitoring wells AMW-1, AMW-3, AMW-4, AMW-
<br /> 5R, AMW-10, AMW-11, AMW-18, AMW-19, and AMW-19BR are designated as corrective
<br /> action monitoring wells. ATC Associates, Inc. has reported that corrective action monitoring
<br /> well AMW-3 has been abandoned. Corrective action monitoring well AMW-5R is a replacement
<br /> for corrective action monitoring well AMW-5. Corrective action monitoring well AMW-19BR is
<br /> a replacement for corrective action monitoring well AMW-1913. The analytical results from
<br /> samples collected at the corrective action wells are used to evaluate improvements in
<br /> groundwater quality as a result of previously implemented corrective action measures.
<br /> Groundwater samples are scheduled to be analyzed quarterly for field parameters (groundwater
<br /> elevation, pH, specific conductance, temperature, and turbidity) and monitoring parameters
<br /> (arsenic, barium, bicarbonate, calcium, carbonate, chloride, gasoline-range petroleum
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