| Report Year: 2009 |
| Ingham Lake, Emmet 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) | 171 | 144 | 157.5 | - | 103.4 | 137.0 | 123.7 | 120.7 | 96.2 | 134.0 | 156.7 | 155.7 |
| Dissolved Organic Carbon (mM) | 1.15 | 1.00 | 1.07 | - | 1.78 | 0.94 | 0.73 | 1.63 | 1.77 | 0.77 | - | - |
| Temperature (oC) | 20.9 | 25.7 | 23.3 | - | 23.5 | 24.8 | 24.1 | 22.3 | 21.2 | 23.7 | 24.4 | 24.9 |
| Specific Conductivity (μS/cm) | 460.0 | 450.0 | 455.00 | - | 406.99 | 428.03 | 421.55 | 461.51 | 446.17 | 545.02 | 545.88 | 446.26 |
| pH | 8.7 | 8.6 | 8.6 | - | 8.6 | 9.1 | 8.8 | 9.0 | 8.8 | 8.9 | 8.7 | 8.6 |
| I (Ionic Strength ?) | 0.0805 | 0.0788 | 0.0796 | - | 0.0712 | 0.0749 | 0.0738 | 0.0808 | 0.0781 | 0.1026 | 0.0955 | 0.0781 |
| Dissolved Inorganic Carbon (mM) | 3.27 | 2.75 | 3.01 | - | 1.97 | 2.42 | 2.30 | 2.17 | 1.80 | 2.44 | 2.92 | 2.89 |
| pCO2 (μatm) | 301 | 275 | 288.0 | - | 323.4 | 80.3 | 142.3 | 81.1 | 125.7 | 215.9 | 453.6 | 458.9 |
| Equilibrium CO2 | 14.27 | 12.41 | 13.34 | - | 13.26 | 12.74 | 13.13 | 13.84 | 14.26 | 12.91 | 12.94 | 13.23 |
| CO2 (μM) | 11.61 | 9.22 | 10.41 | - | 11.80 | 2.81 | 5.00 | 2.99 | 4.67 | 7.80 | 16.16 | 17.04 |
| Δ CO2 from Equilibrium | -2.665 | -3.184 | -2.92 | - | -1.46 | -9.93 | -8.13 | -10.85 | -9.59 | -5.11 | 3.22 | 3.81 |