| Report Year: 2009 |
| Eldred Sherwood Lake, Hancock County |
| Carbon Balance Table |
| Parameter | 6/25/2009 | 7/30/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 228 | 175 | 201.5 | - | 180.4 | 208.5 | 172.0 | 186.9 | 131.0 | 184.3 | 185.3 | 200.0 |
| Dissolved Organic Carbon (mM) | 0.33 | 0.47 | 0.40 | - | 0.43 | 0.40 | 0.47 | 0.56 | 0.66 | 0.80 | - | - |
| Temperature (oC) | 22.9 | 22.3 | 22.6 | - | 24.3 | 22.5 | 25.4 | 22.5 | 21.9 | 22.7 | 21.3 | 23.0 |
| Specific Conductivity (μS/cm) | 570.0 | 500.0 | 535.00 | - | 449.18 | 518.69 | 497.72 | 516.24 | 517.33 | 644.86 | 551.39 | 520.80 |
| pH | 8.2 | 8.4 | 8.3 | - | 8.6 | 8.7 | 8.9 | 8.7 | 8.6 | 8.5 | 8.6 | 8.6 |
| I (Ionic Strength ?) | 0.0998 | 0.0875 | 0.0936 | - | 0.0786 | 0.0908 | 0.0871 | 0.0903 | 0.0905 | 0.1129 | 0.0965 | 0.0911 |
| Dissolved Inorganic Carbon (mM) | 4.51 | 3.41 | 3.96 | - | 3.45 | 3.91 | 3.18 | 3.55 | 2.52 | 3.55 | 3.55 | 3.85 |
| pCO2 (μatm) | 1211 | 540 | 875.6 | - | 455.5 | 376.1 | 209.6 | 550.6 | 299.6 | 458.6 | 468.2 | 455.7 |
| Equilibrium CO2 | 13.44 | 13.68 | 13.56 | - | 12.92 | 13.73 | 12.51 | 13.61 | 13.96 | 13.51 | 14.27 | 13.43 |
| CO2 (μM) | 44.00 | 19.97 | 31.98 | - | 16.59 | 13.15 | 7.18 | 19.90 | 11.19 | 16.70 | 16.67 | 16.65 |
| Δ CO2 from Equilibrium | 30.555 | 6.293 | 18.42 | - | 3.67 | -0.59 | -5.33 | 6.29 | -2.77 | 3.19 | 2.41 | 3.22 |