| Report Year: 2009 |
| Easter Lake, Polk County |
| Carbon Balance Table |
| Parameter | 7/20/2009 | 6/15/2009 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 |
| Alkalinity as CaCO3 (mg/L) | 151 | 153 | 152.0 | - | 128.5 | 121.5 | 106.7 | 119.4 | 81.3 | 100.3 | 123.7 | 112.0 |
| Dissolved Organic Carbon (mM) | 0.34 | 0.32 | 0.33 | - | 0.34 | 0.39 | 0.45 | 0.32 | 0.65 | 0.78 | - | - |
| Temperature (oC) | 23.6 | 21.6 | 22.6 | - | 26.7 | 26.2 | 27.0 | 23.7 | 25.3 | 28.0 | 25.1 | 24.5 |
| Specific Conductivity (μS/cm) | 450.0 | 460.0 | 455.00 | - | 431.29 | 477.56 | 381.01 | 429.54 | 425.53 | 417.19 | 460.58 | 326.26 |
| pH | 8.3 | 8.0 | 8.1 | - | 8.2 | 8.0 | 9.0 | 8.7 | 8.7 | 8.8 | 8.8 | 8.1 |
| I (Ionic Strength ?) | 0.0788 | 0.0805 | 0.0796 | - | 0.0755 | 0.0836 | 0.0667 | 0.0752 | 0.0745 | 0.0730 | 0.0806 | 0.0571 |
| Dissolved Inorganic Carbon (mM) | 2.98 | 3.08 | 3.03 | - | 2.54 | 2.42 | 1.89 | 2.24 | 1.53 | 1.87 | 2.31 | 2.23 |
| pCO2 (μatm) | 679 | 1392 | 1035.2 | - | 1031.8 | 2059.2 | 185.5 | 174.8 | 130.4 | 163.2 | 184.7 | 1143.3 |
| Equilibrium CO2 | 13.17 | 13.96 | 13.56 | - | 12.13 | 12.23 | 12.00 | 13.19 | 12.62 | 11.63 | 12.78 | 12.85 |
| CO2 (μM) | 24.16 | 52.49 | 38.33 | - | 34.25 | 67.75 | 6.57 | 6.27 | 4.64 | 5.21 | 6.76 | 40.43 |
| Δ CO2 from Equilibrium | 10.990 | 38.535 | 24.76 | - | 22.12 | 55.53 | -5.44 | -6.91 | -7.98 | -6.43 | -6.03 | 27.58 |
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