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Table 1. Result of Quarterly Monitoring, GCC Rio Grande, Inc. Red Rock Plant and Limestone Mine. Sampling conducted July <br />10, 2008. <br />Anal to Method Units Basic Std.' MW-002 MW-003 MW-004 DUP-01 <br />DISSOLVED METALS <br />Aluminum 200.7 ICP m /L 5.0(6) <0.10 <0.10 <0.10 <0.10 <br />Barium 200.7 ICP m /L 2.0 0.0302 0.0211 0.0107 0.0315 <br />Beryllium 200.7 ICP m /L 0.004' <0.00045 <0.00045 <0.00045 <0.00045 <br />Boron 200.7 ICP m /L 0.75(6) 0.0986 0.150 0.221 0.0984 <br />Calcium 200.7 ICP m /L -- 145 288 242 150 <br />Chromium 200.7 ICP m /L 0.1 <0.010 <0.010 <0.010 <0.010 <br />Cobalt 200.7 ICP m /L 0.05(6) <0.0050 <0.0050 <0.0050 <0.0050 <br />Iron 200.7 ICP m /L 0.3(a) <0.070 <0.070 <0.070 0.134 <br />Lithium 200.7 ICP m /L 2.5(6) 0.0568 0.0852 0.137 0.0573 <br />Magnesium 200.7 ICP m /L -- 42.3 73.2 100 43.1 <br />Manganese 200.7 ICP m /L 0.05(x) 0.425 0.0950 0.193 0.432 <br />Nickel 200.7 ICP m /L 0.1 <0.030 <0.030 <0.030 <0.030 <br />Potassium 200.7 ICP m /L -- 4.57 3.96 5.61 4.76 <br />Silver 200.7 ICP m /L 0.05 <0.030 <0.030 <0.030 <0.030 <br />Silicon 200.7 ICP m /L -- 14.1 20.0 12.3 14.7 <br />Sodium 200.7 ICP m /L -- 82.6 152 196 84.2 <br />Vanadium 200.7 ICP m /L 0.1(6) <0.01 <0.01 <0.01 <0.01 <br />Zinc 200.7 ICP m /L 5.0(a) <0.03 <0.03 <0.03 <0.03 <br /> <br />Antimony 200.8 ICP-MS m /L 0.006 <0.0020 <0.0020 <0.0020 <0.0020 <br />Arsenic 200.8 ICP-MS m /L 0.01 <0.0020 <0.0020 <0.0020 0.00241 <br />Cadmium 200.8 ICP-MS m /L 0.005 <0.00050 <0.00050 <0.00050 <0.00050 <br />Copper 200.8 ICP-MS m /L 1.0(a) <0.010 <0.010 <0.010 <0.010 <br />Lead 200.8 ICP-MS m /L 0.05 <0.0010 <0.0010 <0.0010 <0.0010 <br />Selenium 200.8 ICP-MS m /L 0.05 <0.0020 0.00248 0.0914 0.00228 <br />Silver 200.8 ICP-MS m /L 0.05 <0.00020 <0.00020 <0.00020 <0.00020 <br />Thallium 200.8 ICP-MS m /L 0.002 <0.00100 <0.00100 <0.00100 <0.00100 <br />Mercury E245.1 CV-AA m /L 0.002 <0.00002 <0.00002 <0.00002 <0.00002 <br />1. Colorado Basic Standard for Groundwater - Human Health, Secondary Drinking Watera? ?b? <br />? <br />, and Agricultural