| Report Year: 2009 |
| Little Spirit Lake, Dickinson County |
| Carbon Balance Table |
| Parameter | 6/3/2009 | 7/7/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 243 | 238 | 240.5 | - | 182.8 | 202.0 | 207.5 | 233.5 | 197.3 | 230.8 | 182.7 | 204.7 |
| Dissolved Organic Carbon (mM) | 0.89 | 0.95 | 0.92 | - | 2.20 | 0.79 | 0.77 | 1.66 | 1.66 | 2.14 | - | - |
| Temperature (oC) | 19.4 | 24.4 | 21.9 | - | 24.1 | 25.2 | 22.3 | 21.8 | 21.7 | 22.8 | 23.0 | 24.7 |
| Specific Conductivity (μS/cm) | 500.0 | 540.0 | 520.00 | - | 419.12 | 467.38 | 500.47 | 549.30 | 548.29 | 635.44 | 524.47 | 487.54 |
| pH | 8.4 | 8.7 | 8.6 | - | 8.9 | 9.3 | 8.8 | 9.0 | 8.9 | 8.7 | 9.1 | 8.7 |
| I (Ionic Strength ?) | 0.0875 | 0.0945 | 0.0910 | - | 0.0733 | 0.0818 | 0.0876 | 0.0961 | 0.0960 | 0.1197 | 0.0918 | 0.0853 |
| Dissolved Inorganic Carbon (mM) | 4.75 | 4.48 | 4.62 | - | 3.36 | 3.39 | 3.79 | 4.18 | 3.65 | 4.42 | 3.24 | 3.96 |
| pCO2 (μatm) | 727 | 345 | 536.2 | - | 226.9 | 89.9 | 587.6 | 316.9 | 191.5 | 572.8 | 114.9 | 473.8 |
| Equilibrium CO2 | 14.94 | 12.85 | 13.90 | - | 13.06 | 12.62 | 13.77 | 14.10 | 14.06 | 13.33 | 13.50 | 13.46 |
| CO2 (μM) | 29.38 | 11.98 | 20.68 | - | 8.48 | 3.17 | 24.27 | 10.93 | 7.31 | 21.70 | 4.29 | 17.33 |
| Δ CO2 from Equilibrium | 14.436 | -0.871 | 6.78 | - | -4.58 | -9.45 | 10.51 | -3.17 | -6.75 | 8.37 | -9.21 | 3.87 |