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TABLE 12 <br />CDOH Yampa Segment 13g (Fish Cr. Trib's) Standards <br />FIELD PH 6.5 - 9.0 <br />AMMONIA, NITROGEN, MG/L 0.05A <br />ARSENIC, TOTAL REC., UG/L <br />340.0 <br />(acute) <br />ARSENIC, TOTAL REC., UG/L <br />7.6 (chronic) <br />BORON, DISSOLVED, UG/L <br />750.0 <br />CADMIUM, UG/L <br />5.7 (acute) <br />CADMIUM, UG/L <br />1.2 (chronic) <br />CHROMIUM, UG/L <br />1773 <br />(acute) <br />CHROMIUM, UG/L <br />231 (chronic) <br />COPPER, UG/L <br />50.0 <br />(acute) <br />COPPER, UG/L <br />29.0 <br />(chronic) <br />IRON, TOTAL REC., MG/L <br />1.0 <br />LEAD, UG/L <br />281.0 <br />(acute) <br />LEAD, UG/L <br />11.0 <br />(chronic) <br />MANGANESE, MG/L <br />4.738 <br />(acute) <br />MANGANESE, MG/L <br />2.618 <br />(chronic) <br />MERCURY, TOTAL, UG/L <br />0.01B <br />NICKEL, UG/L <br />1513.0 <br />(acute) <br />NICKEL, UG/L <br />168.0 <br />(chronic) <br />NITRITE, NITROGEN, MG/L <br />0.05 <br />NITRATE, NITROGEN, MG/L <br />100.0 <br />SELENIUM, UG/L <br />18.4 <br />(acute) <br />SELENIUM, UG/L <br />4.6C <br />(chronic) <br />SULFIDE, MG/L <br />0.02D <br />SILVER, UG/L <br />22.0 <br />(acute) <br />SILVER, UG/L <br />0.81 <br />(chronic) <br />ZINC, MG/L <br />0.565 <br />(acute) <br />ZINC, MG/L <br />0.428 <br />(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://nepis.epa.gov/Adobe/PDF/20003O3L.pdf <br />