Laserfiche WebLink
Table E-3 <br />Groundwater Quality Data for Monitoring Wells MW-7 through MW-13 2008 through 2010 <br />2021 Groundwater Monitoring Report <br />Holcim (US) Inc. <br />Florence, Colorado <br /> <br />Analyte September 2009 December 2009 <br />Field Parameters MCL MW-12 <br />MW-7 Compliance <br />Standards MW-13 MW-13 <br />pH (std. units)6.5-8.5b 7.95 6.97 6.96 7.11 6.93 <br />6.5-8.5a 9.21 7.63 7.99 7.01 NA 6.95 7.00 8.41 7.12 7.24 <br />Conductivity (mS/cm) NA 2.058 3.095 3.361 3.204 3.764 NA 1.109 3.231 2.900 3.215 NA 2.934 2.7 1.309 3.974 3.300 <br />Temperature (°C) NA 17.63 15.61 17.33 18.80 18.72 NA 17.3 20.9 14.3 16.9 NA 13.1 13.90 16.4 15.8 13.2 <br />Alkalinity NA 458 352 239 198 348 NA 581 331 379 409 410 -- -- -- -- -- <br />Chloride 250b 37 31 33 37 36 NA 42 36 29 29 30 -- -- -- -- -- <br />Fluoride 2.0c 0.80 0.9 1.1 0.7 3.4 NA 1.1 3.6 0.8 0.9 0.9 -- -- -- -- -- <br />Hardness, as CaCO3 NA 961 1830 2110 1960 2540 NA 148 2620 2140 2140 2130 -- -- -- -- -- <br />Nitrate as N 10.0a 0.03 B 0.04 B 0.16 0.24 0.06 B NA 0.05 B 0.05 B 0.08 B 0.08 B 0.03 B -- -- -- -- -- <br />Nitrogen, ammonia NA 0.98 0.75 0.15 B 0.31 B 0.74 NA 1.23 0.27 B 0.28 B <0.05 0.06 B -- -- -- -- -- <br />Total Dissolved Solids 1.5 x bkg 1940 3190 3570 3410 4030 3918 720 3990 3660 3620 3590 3,630 3,470 720 3960 3300 <br />Sulfate 250b 850 1730 1840 1980 2300 2080 35 2300 2000 1900 2000 1,900 1,800 4 B 2400 2000 <br />Aluminum (total)5.0c 5.97 0.17 B 1.17 3.11 21.70 NA 9.26 23.1 7.36 9.85 11.8 -- -- -- -- -- <br />Arsenic (total)0.05a 0.0027 0.0010 B 0.001 U 0.0009 B 0.0033 NA 0.0027 0.006 0.005 0.003 B 0.004 B -- -- -- -- -- <br />Calcium (dissolved) NA 202 438 458 439 477 NA 24.2 488 492 491 487 -- -- -- -- -- <br />Calcium (total) NA 206 444 458 439 474 NA 46.1 525 539 524 523 -- -- -- -- -- <br />Iron 0.3b 4.18 0.54 1.85 3.17 14.40 4.5 0.02 U 0.08 0.04 B 0.07 0.22 <0.02 <0.02 0.78 0.25 0.11 <br />Magnesium (dissolved) NA 111 178 235 209 329 NA 21.4 341 222 221 223 -- -- -- -- -- <br />Magnesium (total) NA 112 180 232 208 323 NA 26.5 726 225 195 197 -- -- -- -- -- <br />Manganese (total)0.05b 0.085 0.196 0.317 0.324 0.623 0.88 0.105 0.673 0.13 0.26 0.24 0.113 0.056 0.019 B 0.586 0.018 B <br />Potassium (total) NA 10.4 10.9 9.3 13.0 18.8 17 7.2 20.3 11.9 11.8 12.4 10.3 11.0 5.6 13.5 9.3 <br />Selenium (total)0.02c 0.0005 0.0007 0.0005 B 0.0030 0.0023 <br />0.02d 0.0008 0.0027 0.139 0.0335 0.0406 -- -- -- -- -- <br />Sodium (total) NA 226 207 199 209 221 226 236 156 249 193 198 225 199 228 186 164 <br />All units are in mg/L unless noted otherwise. <br />Bolded values - Screening level exceeded. <br />B - Analyte concentration detected at a value between Method Detection Limit and Practical Quantitation Limit. <br />bkg - Background. <br />MCL - Maximum concentration limit. <br />NA - Not available. <br />U - The analyte was analyzed for, but not detected. Detection limit is numeric value shown. <br />Multiple screening levels present in some instances due to proposed background standards for MW-7. <br />aDRMS-approved Numeric Protection Levels for MW-7. <br />bMCL source: Table 1 Human Health Standards, Regulation 41. <br />cMCL source: Table 2 Secondary Drinking Water Standards, Regulation 41. <br />dMCL source: Table 3 Agricultural Standards for Groundwater, Regulation 41. <br />eMCL source: Table 4 TDS Water Quality Standards, Regulation 41. <br />MW-12 MW-13 <br />March 2010 <br />Notes: <br />June 2009 <br />MW-13 MW-13 DUP MW-7 <br />April 2009 <br />MW-7 MW-12 MW-13 <br />March 2008 <br />MW-7 MW-8 MW-9 MW-11 <br />Laboratory Results <br />Historical GW Data_04142021 Page 1 of 1