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FIELD PH <br />AMMONIA, NITROGEN, MG /L <br />ARSENIC, TOTAL REC., UG /L <br />BORON, DISSOLVED, UG /L <br />CADMIUM, UG /L <br />CADMIUM, UG /L <br />CHROMIUM, UG /L <br />CHROMIUM, UG /L <br />COPPER, UG /L <br />COPPER, UG /L <br />IRON, TOTAL REC , MG /L <br />LEAD, UG /L <br />LEAD, UG /L <br />MANGANESE, MG /L <br />MANGANESE, MG /L <br />MERCURY, TOTAL, UG /L <br />NICKEL, UG /L <br />NICKEL, UG /L <br />NITRITE, NITROGEN, MG /L <br />SELENIUM, UG /L <br />SELENIUM, UG /L <br />SULFIDE, MG /L <br />SILVER, UG /L <br />SILVER, UG /L <br />ZINC, MG /L <br />ZINC, MG /L <br />TABLE 12 <br />CDOH Yampa Segment 13b (Fish Creek) Standards <br />6.5 - 9.0 <br />0.05 <br />100.0 <br />750.0 <br />5.7 (acute) <br />1.2 (chronic) <br />1773 (acute) <br />231 (chronic) <br />50.0 (acute) <br />29.0 (chronic) <br />1.0 <br />281.0 (acute) <br />11.0 (chronic) <br />4.738 (acute) <br />2.618 (chronic) <br />0.01 <br />1513.0 (acute) <br />168.0 (chronic) <br />0.05 <br />18.4 (acute) <br />4.6 (chronic) <br />0.02 <br />22.0 (acute) <br />0.81 (chronic) <br />0.464 (acute) <br />0.405 (chronic) <br />Acute = one day max., Chronic = 30 day average. These values were taken <br />from Table IV, CDOH Reg. 31, using a mean hardness of 400 mg /1. All <br />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 = Detection limit for stream and spring sites is 0.2 ug /l. <br />C = Standard is 0.002 mg /1 (un- ionized). Detection limit is 0.02 mg /1. <br />