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A-25 <br />TABLE 12 <br />CDOH Yampa Segment 13d (Dry Creek) and 13e (Sage Creek) Standards <br /> <br /> FIELD PH <br />6.5 - 9.0 <br /> AMMONIA, NITROGEN, MG/L 0.05A <br /> ARSENIC, TOTAL REC., UG/L 100.0 <br /> BORON, DISSOLVED, UG/L 750.0 <br /> CADMIUM, UG/L 9.1 (acute) <br /> CADMIUM, UG/L 1.2 (chronic) <br /> CHROMIUM, UG/L 1773 (acute) <br /> CHROMIUM, UG/L 231 (chronic) <br /> COPPER, UG/L 50.0 (acute) <br /> COPPER, UG/L 29.0 (chronic) <br /> IRON, TOTAL REC., MG/L 1.0 <br /> LEAD, UG/L 281.0 (acute) <br /> LEAD, UG/L 11.0 (chronic) <br /> MANGANESE, MG/L 4.738 (acute) <br /> MANGANESE, MG/L 2.618 (chronic) <br /> MERCURY, TOTAL, UG/L 0.28 <br /> NICKEL, UG/L 1513.0 (acute) <br /> NICKEL, UG/L 168.0 (chronic) <br /> NITRITE, NITROGEN, MG/L 0.05 <br /> SELENIUM, UG/L 18.4 (acute) <br /> SELENIUM, UG/L 4.6 (chronic) <br /> SULFIDE, MG/L 0.020 <br /> SILVER, UG/L 22.0 (acute) <br /> SILVER, UG/L 3.5 (chronic) <br /> ZINC, MG/L 0.464 (acute) <br /> ZINC, MG/L 0.405 (chronic) <br /> Acute = one day max., Chronic = 30 day average. These values were <br /> taken from Table IV, CDOH Reg. 31, using a mean hardness of 400 mg/l. <br /> All acute/chronic values are the 'dissolved' form. <br /> A = Detection limit is 0.05 mg/l. All values above detection limit are <br /> compared to table standards found on this website: <br /> http://www.epa.gov/waterscience/criteria/ammonia/99update.pdf <br />• B = Standard is 0.01 ug/1. Detection limit is 0.2 ug/1. <br /> C = Standard is 0.002 mg/l (un-ionized). Detection limit is 0.02 mg/l.