| Report Year: 2009 |
| Beaver Lake, Dallas County |
| Carbon Balance Table |
| Parameter | 7/13/2009 | 6/8/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 110 | 185 | 147.5 | - | - | - | 105.7 | 119.0 | 84.2 | 111.7 | 127.7 | 155.0 |
| Dissolved Organic Carbon (mM) | 0.36 | 0.45 | 0.40 | - | - | - | 0.32 | 0.99 | 0.87 | 0.74 | - | - |
| Temperature (oC) | 23.7 | 19.8 | 21.7 | - | - | - | 23.8 | 22.2 | 22.2 | 23.9 | 24.6 | 25.2 |
| Specific Conductivity (μS/cm) | 290.0 | 320.0 | 305.00 | - | - | - | 262.56 | 278.84 | 311.18 | 287.01 | 314.85 | 349.89 |
| pH | 8.8 | 8.3 | 8.6 | - | - | - | 9.0 | 8.8 | 8.7 | 8.6 | 7.5 | 8.1 |
| I (Ionic Strength ?) | 0.0508 | 0.0560 | 0.0534 | - | - | - | 0.0459 | 0.0488 | 0.0545 | 0.0502 | 0.0551 | 0.0612 |
| Dissolved Inorganic Carbon (mM) | 2.07 | 3.66 | 2.86 | - | - | - | 1.94 | 2.07 | 1.57 | 2.15 | 2.67 | 3.09 |
| pCO2 (μatm) | 132 | 791 | 461.9 | - | - | - | 96.2 | 340.7 | 233.4 | 301.0 | 3996.4 | 1601.6 |
| Equilibrium CO2 | 13.15 | 14.75 | 13.95 | - | - | - | 13.17 | 13.78 | 13.78 | 13.16 | 12.90 | 12.60 |
| CO2 (μM) | 4.71 | 31.55 | 18.13 | - | - | - | 3.58 | 13.38 | 8.47 | 11.23 | 134.98 | 52.50 |
| Δ CO2 from Equilibrium | -8.441 | 16.803 | 4.18 | - | - | - | -9.58 | -0.40 | -5.32 | -1.93 | 122.08 | 39.90 |