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<br />Lupton Lakes Sand and Gravel Mine - Ft. Lupton, Colorado <br />Water Quality Monitoring Summary <br />Sample Date:July 2008 <br />Groundwater quality monitoring as required by the Division of Minerals and Geology Permit #M-2004-078 <br /> <br /> Wells <br /> Test Proposed <br /> limits by Reporting Baseline <br /> Parameters Units CDPHE' 2 Limits Levels CRMW-01 CRMW-04 CRMW-06 CRMW-09 CRMW-16 CRMW-41 <br />?c <br />w Fluoride mg/L 4 0.09 1.4 1.30 1.19 1.38 1.18 1.33 1.64 <br /> <br />*C O 3 Nitrate-N mg/L 10 0.04 29.9 16.06 3.29 14.03 <0.04 6.94 16.53 <br /> Chloride mg/L 250 0.01 158 132.60 47.29 102.42 208.98 101.59 138.91 <br /> Iron - Dissolved mg/L 0.3 0.005 0.63 0.202 0.121 0.180 0.171 0.167 0.160 <br /> Conductivity NS -- -- ---- 1018 470 958 1419 863 1094 <br />CO <br />pH <br />units <br />8.5 <br />- <br />- <br />8.00 <br />6.90 <br />7.99 <br />7.85 <br />8.16 <br />8.27 <br />co Sulfate mg/L 250 0.01 237 207.01 83.00 173.74 271.57 192.02 197.00 <br />o Total Dissolved Solids m /L 1.25-Baseline 5.0 1075 605 376 730 1067 617 910 <br /> Bicarbonate mg/L - 0.1 384 293.5 141.8 267.2 498.0 256.6 304.8 <br />S Calcium - Dissolved mg/L -- 0.40 139 116.1 46.3 103.3 154.5 96.5 122.5 <br />. <br />Carbonate <br />mg/L --- <br />0.1 <br />0 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /> Magnesium - Dissolved mg/L ---- 0.1 44 27.1 10.2 23.2 37.1 22.6 32.1 <br /> Sodium - Dissolved mg/L - 0.1 150 126.7 59.7 120.7 153.1 122.8 152.3 <br />w <br />a Total Alkalinity ----- 0.1 - 240.6 116.2 219.0 408.2 210.3 249.8 <br /> CaC03 <br /> Total Suspended Solids mg/L --- 5.0 8015 3987 1145 1296 192 4390 389 <br />a Turbidity NTU - 0.0 - 1763.00 802.00 1438.00 132.00 4040.00 168.00 <br />Secondary Drinking Water Standards - Suggested Limits by CDPHE. The secondary maximum contaminant levels are intended as guidelines. <br />' Colorado Department of Public Health and Environment (CDPHE) maximum contaminant level (MCL) for Drinking Water <br />-Laboratory results shown in RED HIGHLIGHT exceed MCL or suggested sitewide limits but not individual well limits <br />Page 1 of 1 Prepared by Civil Resources, LLC