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<br /> <br />Portland Limestone Quarries (M-1977-344) Permit Amendment-02 <br />Holcim US Inc, 3500 Highway 120, Florence, CO 81226 Revised pursuant to preliminary adequacy review November 20, 2023 <br />Phone (719) 288-1443 www.holcim.us 96 <br />Table 2.7.4.1-1 Surface Water Analyte Lists <br />Surface Water Samples <br />Analyte Fraction Method <br />Method Detection <br />Limit <br />(mg/l) <br />WQCC Surface Water <br />Regulation 32 <br />(g/L) <br />Inorganic <br />Nitrate Dissolved E300.0 0.006 100,000 <br />Nitrite Dissolved E300.0 0.003 500 <br />Phosphorus Dissolved E365.1 0.008 110 <br />Sulfate Dissolved E300.0 0.4 - <br />Sulfide Dissolved SM4500-S2 0.35 2 <br />Metals and Metalloids <br />Aluminum Dissolved 200.8 0.02 - <br />Antimony Dissolved 200.8 0.0001 - <br />Arsenic Total and Dissolved 200.8 0.0005 340 <br />Barium Dissolved 200.7 0.002 - <br />Beryllium Dissolved 200.7 0.0013 - <br />Boron Dissolved 200.7 0.0074 - <br />Cadmium Dissolved 200.8 0.00005 2.03 <br />Chromium Dissolved 200.8 0.0005 - <br />Chromium III Total and Dissolved SM3500-CR B 0.009 231 <br />Chromium VI Dissolved SM3500-CR B 0.009 11 <br />Cobalt Dissolved 200.7 0.0023 - <br />Copper Dissolved 200.7 0.0023 29.3 <br />Iron Dissolved 200.7 0.0031 - <br />Lead Dissolved 200.8 0.00013 10.9 <br />Manganese Dissolved 200.8 0.0004 2,618 <br />Mercury Total 245.1 - <br />Molybdenum Total 200.8 0.00025 - <br />Nickel Dissolved 200.8 0.001 168 <br />Selenium Dissolved 200.8 0.0003 4.6 <br />Silver Dissolved 200.8 0.000025 3.5 <br />Thallium Dissolved 200.8 0.00005 - <br />Uranium Dissolved 200.8 0.00005 6,915 <br />Vanadium Dissolved 200.7 0.0007 428 <br />Zinc Dissolved 200.8 0.0025 - <br />Radiological <br />Gross Alpha Particle Activity Total - <br />Other <br />Oil and grease Total E1664A 3 - <br />TDS Total SM2540C 5 - <br />TSS Total SM2450D 2.5 - <br />