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Central Appalachia WWTF Water Quality Assessment CO-003 and the U.S. Census Bureau TIGER Mapping Service. The data used in the assessment consist of the best information available at the time of preparation of this WQA package. II. Water Quality The Central Appalachia W WTF dischazges to the Water Body Identification (WBID) stream segment COLCLC13b, which means the Lower Colorado River Basin, Lower Colorado River Sub-basin, Stream Segment 13b. This segment is composed of the "All tributaries to the Colorado River, including wetlands, from the Government Highline Canal diversion to a point immediately below Salt Creek, downgradient from the Government Highline Canal, the Orchard Mesa Canal No. 2, Orchazd Mesa Drain, Stub Ditch and the northeast Colorado National Monument boundary, except for specific listings in Segment 13c." Stream segment COLCLC13b is classified for Warm Water Aquatic Life Class 2, Class 1 a Existing Primary Contact Recreation Agriculture. Table A-2 In-stream Standards for Stream Se went COLCLCI3b ;~:~ -~ ~~_. P.laysrca°land=$t~Pog+cal `" .,~'~_. Dissolved Ox en O = 5 m minimum H=6.5-9su Fecal Coliform = 200 colonies/100 ml ~ _~~'-ate .>. ~._ s. .d`,~r'9'~n ' , r H'> w'~_ ~ ZHOY aalC,:,=.: sf~5-,a-,s ., ,~t.~ e ~ ... ~..", ~.; Un-ionized ammonia acute =TVS Un-ionized ammonia chronic = 0.06 m 1 Chlorine acute = 0.019 m /1 Chlorine chronic = 0.011 m /1 Free C nide acute = 0.005 m 1 Sulfide chronic = 0.002 m /1 Boron chronic = 0.75 m 1 Nitrite = 0.05 m /1 Nitrate =100 m 1 s ~?;.T'~~.,a,. '. CrF s .~ :~.»~.. sr ~'t^: '%eti"~i'v'^,~=.ale§s -r""~R ~l'._z ~r$t ~` a ,K, ;.m }~* _~ a,m~~ ..i `~.. ~. _-....~~A s..~ . r _:,~r 9.-n.; ~„+,,.-, etals,:.~-;.,,, .sa.~~;,u~:.., ., .. .aFS -,'~a,..-, Total Recoverable Arsenic chronic = 100 u /1 Dissolved Cadmium acute and chronic =TVS Dissolved Trivalent Chromium acute and chronic =TVS Dissolved Hexavalent Chromium acute and chronic =TVS Dissolved C er acute and chronic =TVS Total Recoverable Iron chronic = 1000 u 1 Dissolved Lead acute and chronic =TVS Dissolved Man anese chronic = 2618 u /1 Dissolved Man anese acute =TVS Total Mercer chronic = 0.01 u Dissolved Nickel acute and chronic =TVS Dissolved Selenium acute =TVS Dissolved Selenium chronic = Existin ali tem or mod throe h 2/28/09 Dissolved Silver acute and chronic =TVS Dissolved Zinc acute and chronic =TVS Numeric standards aze developed on abasin-specific basis and aze adopted for particulaz stream segments by the Water Quality Control Commission. To simplify the listing of the segment-specific Appendix A Page 3 of 9 Draft