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1.0 Surface Water Monitoring 0
<br /> Surface water samples at the Austin Road Landfill were collected during the first quarter 2009
<br /> monitoring event from Littlejohns Creek, as the upstream monitoring point (ASW-1) and
<br /> downstream monitoring point(ASW-2)were reportedly dry.
<br /> The historical surface water data are presented in Appendix A. The data are graphed on time
<br /> series concentration plots,presented in Appendix B.
<br /> Historical data from the surface water monitoring points were evaluated for temporal trend using
<br /> Sen's Slope trend analysis. Graphs of the Sen's Slope analyses for surface water monitoring
<br /> points are presented in Appendix B. There were no constituents that exhibited a statistically
<br /> significant upward trend. Sen's Slope analysis identified decreasing trends in chemical oxygen
<br /> demand at ASW-1, nitrate at ASW-2, field specific conductance at ASW-1, TDS at ASW-1 and
<br /> 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 /> Groundwater samples were collected by ATC Associates, Inc. during the first quarter 2009
<br /> monitoring event from the detection monitoring and corrective action wells at the site.
<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, and AMW-19 are designated as corrective action monitoring
<br /> wells. Corrective action monitoring well AMW-5R is a replacement for corrective action
<br /> monitoring well AMW-5. The analytical results from samples collected at the corrective action
<br /> wells are used to evaluate improvements in groundwater quality as a result of previously
<br /> implemented corrective action measures.
<br /> ATC Associates, hic. reported that corrective action monitoring well AMW-3 has been
<br /> abandoned.
<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
<br /> hydrocarbons, hexavalent chromium, magnesium, nitrate, oil and grease, potassium, sodium,
<br /> strontium,sulfate,TDS,and VOCs).
<br /> 2.1 Detection Monitoring
<br /> Groundwater samples were collected from the background well (AMW-2) and detection
<br /> monitoring wells(AMW-6,AMW-7,AMW-12,AMW-13,and AMW-14)during the first quarter
<br /> 2009 monitoring event. The field results provided by ATC Associates, hic. and laboratory results
<br /> provided by BC Laboratories, Inc. for the first quarter 2009 detection monitoring sampling are
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