ARCHIVED REPORTS_2009_12 - Laserfiche WebLink

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The first quarter 2009 concentration of bicarbonate at AMW-1 (630 mg/L) is comparable to concentrations observed at that well intermittently since August 2003. The first quarter 2009 concentration of bicarbonate at AMW-5R (440 mg/L) is comparable to concentrations observed at that well consistently for the past six monitoring events. The first quarter 2009 concentration of bicarbonate at AMW-18 (340 mg/L) is comparable to concentrations observed at that well consistently since November 2004. The first quarter 2009 concentration of chloride at AMW-5R (110 mg/L) is comparable to concentrations previously observed at AMW-5, and is below the National Secondary Drinking Water Standard (250 mg/L). The first quarter 2009 concentration of nitrate at AMW-4 (2.7 mg/L) is comparable to concentrations observed at AMW-4 intermittently since March 1996, and is below the National Primary Drinking Water Standard(10 mg/L). The first quarter 2009 concentration of nitrate at AMW-5R (25 mg/L) is comparable to concentrations observed at AMW-5R during the past six monitoring events. The first quarter 2009 concentration of sodium at AMW-5R (70 mg/L) is comparable to concentrations observed at that well during the past five monitoring events. The first quarter 2009 field specific conductance value at AMW-1 (1,200 umhos/cm) is comparable to values observed at that well intermittently since July 1999. The first quarter 2009 field specific conductance value at AMW-5R (1,350 umhos/cm) is comparable to values observed at AMW-5 intermittently since November 2003. The first quarter 2009 concentration of strontium at AMW- 18 (1 mg/L) is comparable to concentrations observed at that well consistently since August 2004. The first quarter 2009 concentration of sulfate at AMW-5R (67 mg/L) is comparable to concentrations observed at that well (or AMW-5) consistently since July 2001, and is well below the National Secondary Drinking Water Standard (250mg/L). The first quarter 2009 concentration of sulfate at -10 (67 mg/L) is comparable to concentrations observed at that well since May 2006, and is well below the National Secondary Drinking Water Standard (250 mg/L). The first quarter 2009 concentration of TDS at AMW-5R (880 mg/L) is comparable to concentrations observed at AMW-5 intermittently since August 2007. The first quarter 2009 field turbidity value at AMW-5R (66 NTUs) is the lowest field turbidity value observed at that well since the first sampling event in August 2007. The first quarter 2009 field turbidity value at AMW-10 (7 NTUs) is comparable to values observed at that well intermittently since July 1998. The first quarter 2009 field turbidity value at AMW-19 (883 NTUs)is the lowest value observed at that well since November 2006. Sen's Slope analysis identified decreasing trends in the following inorganic parameters: barium at AMW-4, bicarbonate at AMW-4, calcium at AMW-4, AMW-10, and AMW-11, carbonate at AMW-18, chloride at AMW-4, AMW-10, AMW-11, and AMW-18, magnesium at AMW-4, AMW-10, and AMW-11, nitrate at AMW-1, AMW-10, and AMW-18, field pH at AMW-1 and AMW-18, potassium at AMW-4, AMW-10, AMW-11, and AMW-18, sodium at AMW-4, AMW-10, AMW-18 and AMW-19, strontium at AMW-4, AMW-10 and AMW-11, field specific conductance at AMW-4 and AMW-11, sulfate at AMW-1, AMW-18, and AMW-19, TDS at AMW-4 and AMW-11, field temperature at AMW-4 and AMW-11, and field turbidity at AMW- 1 and AMW-18. The field pH value observed at AMW-1 during the first quarter 2009 (6.98 s.u.) is comparable to pH values observed at that well intermittently since March 1996, and is within the National Secondary Drinking Water Standard range (6.5 - 8.5 s.u.). The first quarter 2009 field pH value at AMW-1 is the highest pH value observed at that well since February 2007. The field pH value observed at AMW-18 during the first quarter 2009(7.2 s.u.)is comparable to pH values observed 4