| Report Year: 2009 |
| Lake of the Hills, Scott County |
| Carbon Balance Table |
| Parameter | 6/23/2009 | 7/28/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 160 | 147 | 153.5 | - | 136.6 | 173.7 | 176.7 | 147.5 | 110.0 | 145.2 | 150.0 | 149.7 |
| Dissolved Organic Carbon (mM) | 0.41 | 0.33 | 0.37 | - | 0.40 | 0.45 | 0.63 | 0.33 | 0.61 | 0.58 | - | - |
| Temperature (oC) | 28.2 | 24.9 | 26.6 | - | 25.4 | 25.1 | 27.4 | 25.6 | 24.5 | 26.3 | 26.5 | 25.2 |
| Specific Conductivity (μS/cm) | 420.0 | 410.0 | 415.00 | - | 369.31 | 500.21 | 492.82 | 399.15 | 414.34 | 557.35 | 416.19 | 417.12 |
| pH | 8.5 | 8.5 | 8.5 | - | 8.5 | 8.4 | 8.6 | 8.5 | 8.7 | 8.5 | 8.9 | 8.5 |
| I (Ionic Strength ?) | 0.0735 | 0.0718 | 0.0726 | - | 0.0646 | 0.0875 | 0.0862 | 0.0699 | 0.0724 | 0.0975 | 0.0728 | 0.0730 |
| Dissolved Inorganic Carbon (mM) | 3.09 | 2.84 | 2.96 | - | 2.64 | 3.39 | 3.36 | 2.82 | 2.13 | 2.79 | 2.77 | 2.91 |
| pCO2 (μatm) | 406 | 364 | 384.7 | - | 471.9 | 686.0 | 535.5 | 839.5 | 330.9 | 341.7 | 159.2 | 465.8 |
| Equilibrium CO2 | 11.54 | 12.69 | 12.12 | - | 12.52 | 12.67 | 11.84 | 12.47 | 12.17 | 12.21 | 12.25 | 12.58 |
| CO2 (μM) | 12.65 | 12.48 | 12.57 | - | 16.28 | 22.90 | 18.06 | 30.17 | 10.88 | 11.34 | 5.44 | 15.84 |
| Δ CO2 from Equilibrium | 1.109 | -0.213 | 0.45 | - | 3.76 | 10.23 | 6.22 | 17.70 | -1.28 | -0.87 | -6.81 | 3.27 |