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Analyte <br />Field Parameters <br />Apr -09 <br />Jun-09 <br />Sep -09 <br />Dec -09 <br />Mar -10 <br />Mar -11 <br />pH (std. units) <br />7.99 <br />7.01 <br />6.95 <br />7.00 <br />7.24 <br />7.03 <br />Conductivity (mS /cm) <br />2.9 <br />3.215 <br />2.934 <br />2.7 <br />3.300 <br />2.653 <br />Temperature ( °C) <br />14.3 <br />16.9 <br />13.1 <br />13.9 <br />13.2 <br />14.6 <br />Laboratory Results <br />Alkalinity <br />379 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Chloride <br />29 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Fluoride <br />0.8 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Hardness, as CaCO <br />2140 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Nitrate as N <br />0.08 <br />B <br />NA <br />NA <br />NA <br />NA <br />NA <br />Nitrogen, ammonia <br />0.28 <br />B <br />NA <br />NA <br />NA <br />NA <br />NA <br />Total dissolved solids <br />3660 <br />3620 <br />3630 <br />3470 <br />3300 <br />3180 <br />Sulfate <br />2000 <br />1900 <br />1900 <br />1800 <br />2000 <br />1770 <br />Aluminum (total) <br />7.36 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Arsenic (total) <br />0.005 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Calcium (dissolved) <br />492 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Calcium (total) <br />539 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Iron <br />0.04 <br />B <br />0.07 <br />0.02 <br />B <br />0.02 <br />B <br />0.11 <br />U <br />Magnesium (dissolved) <br />222 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Magnesium (total) <br />225 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Manganese (dissolved) <br />0.13 <br />0.26 <br />0.113 <br />0.056 <br />0.018 <br />B <br />U <br />Potassium (dissolved) <br />11.9 <br />11.8 <br />10.3 <br />11.0 <br />9.3 <br />8.9 <br />Selenium (total) <br />0.139 <br />NA <br />NA <br />NA <br />NA <br />NA <br />Sodium (dissolved) <br />249 <br />193 <br />225 <br />_ 199 <br />164 <br />170 <br />- - - - - - - i r - • - s - - • - r - <br />Table 3 <br />Quarterly Sampling Results MW -13 <br />Holcim (US) Inc. <br />Florence, Colorado <br />Notes: <br />All units are in mg /L unless noted otherwise. <br />B - Analyte concentration detected at a value between Method Detection Limit and Practical Quantitation Limit. <br />bkg - Background. <br />NA - Not analyzed <br />U - The material was analyzed for, but was not detected above the level of the associated value. <br />The associated value is either the sample quantitation limit or the sample detection limit. <br />G:\AProject\255.10 - Holcim\GW Monitoring Report \March 2011 \Tables \Tables 123_05312011.xis Page 1 of 1 <br />