| Report Year: 2009 |
| Littlefield Lake, Audubon County |
| Carbon Balance Table |
| Parameter | 7/13/2009 | 6/10/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 158 | 140 | 149.0 | - | 125.3 | 135.0 | 126.3 | 125.3 | 87.0 | 112.7 | 98.3 | 128.0 |
| Dissolved Organic Carbon (mM) | 0.29 | 0.45 | 0.37 | - | 0.39 | 0.44 | 0.31 | 0.40 | 0.80 | 0.90 | - | - |
| Temperature (oC) | 25.1 | 18.8 | 21.9 | - | 25.2 | 25.5 | 23.7 | 20.6 | 24.2 | 26.1 | 22.3 | 25.2 |
| Specific Conductivity (μS/cm) | 330.0 | 320.0 | 325.00 | - | 264.70 | 295.26 | 294.07 | 276.94 | 289.53 | 246.90 | 232.57 | 261.87 |
| pH | 8.3 | 7.8 | 8.1 | - | 8.5 | 9.2 | 8.6 | 8.0 | 8.8 | 9.2 | 9.4 | 8.6 |
| I (Ionic Strength ?) | 0.0578 | 0.0560 | 0.0569 | - | 0.0463 | 0.0517 | 0.0515 | 0.0485 | 0.0507 | 0.0401 | 0.0407 | 0.0458 |
| Dissolved Inorganic Carbon (mM) | 3.11 | 2.85 | 2.98 | - | 2.37 | 2.32 | 2.42 | 2.53 | 1.62 | 1.71 | 1.55 | 2.47 |
| pCO2 (μatm) | 699 | 1806 | 1252.2 | - | 943.7 | 120.3 | 362.2 | 1322.3 | 117.1 | 28.6 | 115.0 | 364.3 |
| Equilibrium CO2 | 12.62 | 15.20 | 13.91 | - | 12.66 | 12.49 | 13.23 | 14.47 | 13.01 | 11.35 | 13.95 | 12.61 |
| CO2 (μM) | 23.84 | 74.19 | 49.01 | - | 34.43 | 4.12 | 13.48 | 51.03 | 4.06 | 0.88 | 5.15 | 12.24 |
| Δ CO2 from Equilibrium | 11.211 | 58.987 | 35.10 | - | 21.78 | -8.37 | 0.24 | 36.57 | -8.95 | -10.47 | -8.80 | -0.37 |