| Report Year: 2009 |
| Lake Meyer, Winneshiek County |
| Carbon Balance Table |
| Parameter | 7/29/2009 | 6/24/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 154 | 155 | 154.5 | - | - | - | 150.7 | 145.7 | 106.8 | 158.8 | 137.7 | 183.3 |
| Dissolved Organic Carbon (mM) | 0.41 | 0.37 | 0.39 | - | - | - | 0.57 | 0.37 | 0.74 | 0.73 | - | - |
| Temperature (oC) | 22.9 | 25.0 | 24.0 | - | - | - | 26.5 | 23.2 | 22.8 | 23.9 | 22.2 | 22.9 |
| Specific Conductivity (μS/cm) | 440.0 | 430.0 | 435.00 | - | - | - | 413.85 | 385.87 | 417.85 | 486.75 | 378.54 | 431.18 |
| pH | 8.6 | 8.9 | 8.8 | - | - | - | 9.3 | 8.7 | 8.9 | 8.5 | 9.0 | 8.7 |
| I (Ionic Strength ?) | 0.0770 | 0.0753 | 0.0761 | - | - | - | 0.0724 | 0.0675 | 0.0728 | 0.0852 | 0.0662 | 0.0755 |
| Dissolved Inorganic Carbon (mM) | 2.95 | 2.87 | 2.91 | - | - | - | 2.50 | 2.76 | 1.96 | 3.07 | 2.74 | 3.49 |
| pCO2 (μatm) | 287 | 165 | 225.9 | - | - | - | 237.2 | 416.7 | 110.4 | 479.8 | 223.0 | 379.6 |
| Equilibrium CO2 | 13.46 | 12.63 | 13.05 | - | - | - | 12.14 | 13.35 | 13.08 | 13.10 | 14.12 | 13.46 |
| CO2 (μM) | 10.44 | 5.62 | 8.03 | - | - | - | 8.52 | 15.66 | 3.95 | 17.63 | 10.04 | 14.05 |
| Δ CO2 from Equilibrium | -3.017 | -7.008 | -5.01 | - | - | - | -3.62 | 2.31 | -9.13 | 4.53 | -4.07 | 0.59 |