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Well Increasing Trends Decreasing Trends
<br /> Number
<br /> AMW-4 Nitrate-N Barium,Bicarbonate,Calcium,Chloride,
<br /> Magnesium,Potassium,Sodium,
<br /> Strontium,Specific Conductance,TDS,
<br /> 1,1-DCA, 1,4-Dichlorobenzene,cis-1,2-
<br /> DCE,DCDFM,PCE,Vinyl Chloride
<br /> AMW-5/5R Barium,Bicarbonate,Chloride,Nitrate-N, PCE
<br /> pH, Sodium,Specific Conductance,
<br /> Sodium, Sulfate,TDS
<br /> AMW-10 Sulfate,cis-1,2-DCE Calcium,Chloride,Magnesium,Nitrate-N,
<br /> Potassium,Sodium,Strontium, 1,1-DCA,
<br /> DCDFM
<br /> AMW-11 None Apparent Calcium,Chloride,Magnesium,
<br /> Potassium,Strontium,Specific
<br /> Conductance TDS,cis-1,2-DCE,
<br /> Chloroform,DCDFM,PCE,TCE
<br /> AMW-18 Bicarbonate,Strontium Carbonate,Chloride,Nitrate-N,pH,
<br /> Potassium,Sulfate,Sodium
<br /> AMW-19 I PCE,TCE Sodium,Sulfate
<br /> The increasing trend exhibited by vinyl chloride and/or cis-1,2-DCE suggests reductive
<br /> dechlorination is occurring in the vicinity of wells AMW-1 and AMW-10.
<br /> 3.1.6 Domestic Well Monitoring
<br /> Two domestic wells (7898-A and 8106-A) were sampled on February 9, 2009. Table 3-3
<br /> summarizes the current analytical results for the domestic well samples collected. As
<br /> shown on Table 3-3, two trace-level VOCs (l,l-DCA and cis-1,2-DCE) were detected in
<br /> the sample collected from domestic well 8106-A; and three VOCs (DCDFM, PCE, and
<br /> TCE) were measured above the PQL in the samples collected from both domestic wells
<br /> 7898-A and 8106-A.
<br /> 3.1.7 Surface Water Monitoring
<br /> During the first quarter 2009 monitoring period,no surface-water was observed at
<br /> monitoring stations ASW-1 and ASW-2, and as a result, surface water samples were not
<br /> collected.
<br /> 3.1.8 Leachate Monitoring
<br /> According to the Operations Manager,no leachate was taken off site during the first
<br /> quarter 2009. The leachate collection system,which collects leachate from the north face
<br /> of the landfill, has been operational since November 1996. WQPS (concentration limits)
<br /> are not required for leachate because it is collected and removed for disposal, rather than
<br /> discharged. According to the Operations Manager, the LCRS operated effectively during
<br /> the first quarter 2009.
<br /> D:\2009_0017\FA_1Q09.doc
<br /> 12 Geologic Associates
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