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The third quarter 2012 concentration of barium at AMW-1 (0.54 mg/L) is below the National • Primary Drinking Water Standard of 2 mg/L. The increasing trend for dissolved barium at AMW-1 is not observed when the data are limited to the period of February 2006 to August 2012, indicating that concentrations have stabilized in the past six years. The third quarter 2012 concentration of barium at AMW-19 (0.2 mg/L) is below the National Primary Drinking Water Standard of 2 mg/L. The increasing trend for dissolved barium at AMW-19 is not observed when the data are limited to the period of May 2004 to September 2012, indicating that concentrations have stabilized in the past eight years. The third quarter 2012 concentration of bicarbonate alkalinity at AMW-1 (770 mg/L) is within the range of concentrations observed at that well since June 1994 (264 to 1,300 mg/L). The increasing trend for bicarbonate at AMW-1 is not observed when the data are limited to the period of September 1994 to August 2012, indicating that concentrations have stabilized in the past eighteen years. The third quarter 2012 concentration of bicarbonate alkalinity at AMW-5R (470 mg/L) is within the range of concentrations observed at that well since March 1994 (148 to 550 mg/L). The increasing trend for bicarbonate at AMW-5R is not observed when the data are limited to the period of April 1995 to August 2012, indicating that concentrations have stabilized in the past seventeen years. The third quarter 2012 concentration of bicarbonate alkalinity at AMW-18 (350 mg/L) is within the range of concentrations observed at that well since March 2004 (28 to 370 mg/L). The increasing trend for bicarbonate at AMW-18 is not observed when the data are limited to the period of February 2005 to September 2012, indicating that concentrations have stabilized in the past seven years. The third quarter 2012 concentration of chloride at AMW-5R (110 mg/L) is within the range of concentrations observed at that well since March 1994 (1.24 to 130 mg/L), and is below the National Secondary Drinking Water Standard of 250 mg/L. The increasing trend for chloride at AMW-5R is not observed when the data are limited to the period of May 2000 to August 2012, indicating that concentrations have stabilized in the past twelve years. The third quarter 2012 concentration of chloride at AMW-19BR (69 mg/L) is higher than the range of concentrations observed at that well since November 2007 (38 to 56 mg/L), but is below the National Secondary Drinking Water Standard of 250 mg/L. The increasing trend for chloride at AMW-19BR is not observed when the data are limited to the period of February 2008 to September 2012, indicating that concentrations have stabilized in the past four years The third quarter 2012 concentration of nitrate at AMW-4 is non -detect (<0.1 mg/L). The increasing trend for nitrate at AMW-4 is not observed when the data are limited to the period of October 2001 to August 2012, indicating that concentrations have stabilized in the past eleven years. The third quarter 2012 concentration of nitrate at AMW-5R (29 mg/L) is within the range of concentrations observed at that well since March 1994 (<0.012 to 32 mg/L), but is above the National Primary Drinking Water Standard of 10 mg/L. However, the increasing trend for nitrate at AMW-5R is not observed when the data are limited to the period of February 2004 to August 2012, indicating that concentrations have stabilized in the past eight years. The third quarter 2012 field pH value at AMW-4 (7.56 s.u.) is within the range of values observed at that well since March 1996 (6.05 to 8.41 s.u.), and is within the National Secondary Drinking Water Standard range of 6.5 to 8.5 s.u. The increasing trend for field pH at AMW-4 is not observed when the data are limited to the period of February 2004 to August 2012, indicating that values have stabilized in the past eight years. The third quarter 2012 field pH value at AMW-5R (7.05 s.u.) is within the range of values observed at that well since March 1994 (6.00 to 7.72 s.u.), and is within the National Secondary Drinking Water Standard range of 6.5 to 8.5 s.u. The increasing trend for field pH at AMW-5R is not observed when the data are limited to the 7