| Report Year: 2009 |
| Avenue of the Saints Lake, Bremer County |
| Carbon Balance Table |
| Parameter | 7/29/2009 | 6/24/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 83 | 76 | 79.5 | - | - | - | 90.3 | 89.7 | 74.3 | 109.2 | 87.0 | 116.0 |
| Dissolved Organic Carbon (mM) | 0.59 | 0.56 | 0.58 | - | - | - | 0.73 | 0.55 | 0.89 | 0.85 | - | - |
| Temperature (oC) | 26.2 | 25.7 | 25.9 | - | - | - | 25.5 | 22.6 | 23.3 | 24.3 | 24.1 | 23.6 |
| Specific Conductivity (μS/cm) | 300.0 | 230.0 | 265.00 | - | - | - | 224.78 | 318.69 | 275.25 | 327.85 | 196.72 | 270.26 |
| pH | 8.4 | 9.2 | 8.8 | - | - | - | 9.4 | 8.8 | 8.4 | 8.2 | 9.2 | 8.4 |
| I (Ionic Strength ?) | 0.0525 | 0.0403 | 0.0464 | - | - | - | 0.0393 | 0.0558 | 0.0482 | 0.0574 | 0.0344 | 0.0473 |
| Dissolved Inorganic Carbon (mM) | 1.63 | 1.31 | 1.47 | - | - | - | 1.46 | 1.64 | 1.46 | 2.16 | 1.52 | 2.26 |
| pCO2 (μatm) | 306 | 31 | 168.1 | - | - | - | 55.6 | 178.3 | 295.7 | 869.1 | 141.3 | 1206.7 |
| Equilibrium CO2 | 12.21 | 12.41 | 12.31 | - | - | - | 12.49 | 13.57 | 13.35 | 12.94 | 13.31 | 13.17 |
| CO2 (μM) | 10.08 | 1.03 | 5.56 | - | - | - | 1.98 | 6.66 | 10.78 | 31.35 | 6.38 | 43.34 |
| Δ CO2 from Equilibrium | -2.125 | -11.382 | -6.75 | - | - | - | -10.51 | -6.91 | -2.57 | 18.41 | -6.94 | 30.17 |