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COLORADO LEGACY LAND <br /> TABLE 213:SUMMARY OF SURFACE WATER ANALYTICAL DATA <br /> Surface Water Quality Standards Sample <br /> Segment 17b,Ralston Creek Location <br /> Parameter Units <br /> (CDPHE 2019)' SW-ARH <br /> Acute Chronic 10/06/2022 <br /> Physical Properties <br /> TDS-Total Dissolved Solids mg — — 518 <br /> TSS-Total Suspended Solids mg/L — — <5 <br /> Major Ions <br /> Alkalinity as CaCO3 mg/L — — 179 <br /> Bicarbonate as CaCO3 mg/L — — 179 <br /> Calcium-Dissolved mg/L — — 54.5 <br /> Carbonate as CaCO3 mg/L — — <2 <br /> Chloride mg/L — 250 44.3 <br /> Fluoride mg/L — — 0.52 <br /> Hydroxide as CaCO3 mg/L — — <2 <br /> Magnesium-Dissolved mg/L — — 17.8 <br /> Potassium-Dissolved mg/L — — 3.84 <br /> Sodium -Dissolved mg/L — — 96.3 <br /> Sulfate mg/L — 250 178 <br /> Nutrients <br /> Cyanide-Weak Acid Dissociable mg/L 0.005 — <0.003 <br /> Nitrate+Nitrite as N mg/L NO3= 10 NO2=<0.05 0.107 <br /> Phosphate-Total mg/L — — 0.0682 <br /> Phosphorus -Total mg/L — 0.11 0.022 <br /> Metals-Dissolved <br /> Aluminum mg/L — — <0.05 <br /> Antimony mg/L — — <0.0004 <br /> Arsenic mg/L 0.34 — 0.00072 <br /> Boron mg/L — 0.75 0.102 <br /> Chromium III=0.11 <br /> Chromium mg/L <0.02 <br /> Chromium IV= <0.016 Chromium IV= <0.011 <br /> Copper mg/L <0.0213 <0.0136 <0.01 <br /> Iron mg/L — 0.3 <0.06 <br /> Lead mg/L 0.109 0.0043 <0.0001 <br /> Manganese mg/L 3.51 1.94 0.129 <br /> Mercury mg/L — — <0.0002 <br /> Molybdenum mg/L — — 0.0134 <br /> Silver mg/L 0.0047 <0.00017 <0.0001 <br /> PAGE 8 OF 16 <br />