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• LGSC: Parameter Mean aea Range Max. Min. Max at Min at Trend Lab H 8.00 0.23 2.4 8.5 6.1 08/19/91 05/14/9] Level Lab Cond. 1689.91 326.59 2659 2820 161 01/19/93 06/23/92 Increasin TDS 1329.15 362.96 3330 4050 720 11/08/00 05/23/95 Increasin Sulfate 656.99 161.98 685 945 260 12/04/89 05/20/97 Decreasin Calcium 141.03 26.08 140 208 68 12/28/89 3/13/84 Increasin Iron 0.61 0.64 4.24 4.27 0.03 04/27/98 02/01/88 Level Ma nesium 146.26 29.68 149.4 226 76.6 12/04/89 05/20/97 Increasin Sodium 71.31 25.99 144.3 164 19.7 10/08/98 04/17/00 Increasin Flow rate 4.35 5.62 46.94 47 0.06 04/27/98 12/06/99 Decreasin LTC: • Parameter Mean aea Range Max. Min. Max at Min at Trend Lab H 8.09 0.27 1.6 8.6 7 02/25/91 02/22/89 Level Lab Cond. 1592.35 438.92 3370 3570 200 06/06/98 02/28/90 Increasin TDS 1127.76 355.76 1786 1930 144 12/05/89 02/28/90 Increasin Sulfate 512.25 211.36 1109 1128 19 10/05/89 02/28/90 Increasin Calcium 90.86 25.92 108.2 134 25.8 02/24/86 02/05/01 Decreasin Iron 4.94 18.67 131.99 132 0.01 02/28/90 09/13/95 Level Ma nesium 116.88 45.65 230 238 8 10/12/88 02/28/90 Increasin Sodium 92.79 36.07 168 174 6 10/05/89 02/28/90 Increasin Flow rate 0.56 .98 6.3 6.3 0 04/29/86 12/13/02 Decreasin Colowyo currently samples each ground water site for a variety of quality parameters. Of all the pazameters that are analyzed for, several key indicator parameters aze identified. These aze lab pH, lab conductivity, TDS, sulfate, calcium, iron, magnesium, sodium and elevation. Statistical analysis is completed and illustrates historical trends for each parameter in Exhibit 2B. Ground Water Data -The R2 value for linear regression is indicated below. Site Id Lab H Lab Conductivi TDS Sulfate Calcium Irou Maguesium Sodium Elevation feet A-6 0.0526 0.0242 0.1256 0.0324 0.0100 0.1597 0.0093 0.0009 0.0069 I NGSW 0.0431 0.0722 0.0797 0.2245 0.1646 0.1817 0.0927 0.0287 0.0075 Gossazd 0.1685 0.4481 0.6508 0.5132 0.2479 0.0524 0.2387 0.0067 0.2909 i CF 4.3 2003