| Report Year: 2009 |
| Nelson Park Lake, Crawford County |
| Carbon Balance Table |
| Parameter | 7/15/2009 | 6/10/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 219 | 217 | 218.0 | - | 209.3 | 197.2 | 215.3 | 178.5 | 141.7 | 188.8 | 203.3 | 191.0 |
| Dissolved Organic Carbon (mM) | 0.39 | 0.35 | 0.37 | - | 0.39 | 0.52 | 0.43 | 0.40 | 0.70 | 0.75 | - | - |
| Temperature (oC) | 25.3 | 20.2 | 22.7 | - | 25.2 | 25.7 | 24.3 | 20.0 | 23.7 | 26.4 | 22.8 | 25.5 |
| Specific Conductivity (μS/cm) | 460.0 | 450.0 | 455.00 | - | 450.45 | 404.70 | 460.05 | 416.31 | 424.46 | 499.68 | 413.99 | 390.42 |
| pH | 7.5 | 8.2 | 7.8 | - | 8.1 | 9.0 | 8.6 | 8.8 | 8.6 | 8.6 | 8.6 | 8.9 |
| I (Ionic Strength ?) | 0.0805 | 0.0788 | 0.0796 | - | 0.0788 | 0.0708 | 0.0805 | 0.0729 | 0.0743 | 0.0874 | 0.0724 | 0.0683 |
| Dissolved Inorganic Carbon (mM) | 4.60 | 4.30 | 4.45 | - | 4.17 | 3.51 | 4.14 | 3.39 | 2.72 | 3.61 | 3.90 | 3.50 |
| pCO2 (μatm) | 6919 | 1090 | 4004.5 | - | 1570.6 | 183.2 | 485.5 | 250.8 | 314.2 | 373.8 | 991.4 | 187.9 |
| Equilibrium CO2 | 12.53 | 14.60 | 13.56 | - | 12.64 | 12.43 | 12.96 | 14.68 | 13.19 | 12.21 | 13.62 | 12.49 |
| CO2 (μM) | 234.37 | 43.01 | 138.69 | - | 54.82 | 5.90 | 16.79 | 9.95 | 10.92 | 12.42 | 41.29 | 6.42 |
| Δ CO2 from Equilibrium | 221.839 | 28.413 | 125.13 | - | 42.17 | -6.52 | 3.84 | -4.73 | -2.28 | 0.21 | 27.67 | -6.07 |