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COLORADO DEPARTMENT OF HEALTH, l4'utcr Qualit}~ Control Division <br />Rnttmmle -Page 4, Permit No. CO-0034/42 <br />Table /1/-/ M1/etals Standards Summary -Williams Fork River, SeRmen( 136, A!/ Concentra(ions Are N8/~ <br />Parameter Aquatic Lije Use Drinking Water Us.e Agricu/(oral Use <br />Dissolved hlethod• Total Recoverable Mefh~od•• To(a/ Recoverable <br />Method <br />Acute Chronic Acute Chronic Chronic <br />/ron - 1000" - 300•• - <br />Zlnc ll7 /06 - 5000 2000 <br />• Aquatic Lije U.ce standards are based upon the di.rsoh•ed medtod ojnnnlysi.r. ei~cept jor' the iron .standard, which is based upon <br />the tool recoverable method. <br />•• Drinking Water Use.rtnnr/nrdc are bn.ced upon die thud recoverable method ojnna/}tci,c, except for the iron standard, +vhich i.c <br />bused upon the dissolved method. <br />Allo+vah/e b+strenm Total Ammonia /n order to insure the inctrearn standard jar un-ionized mnrnonin wil! be protected <br />e~uent lirnitntion.c jor rota! ammonia were evnlua[ed. To do .co, the Division .clnndnrdly uses the Colorado Ammonia <br />Model +vhen sufficient .rlr'earn and of/Iuen! pH and temperature data are arnilnhle. In this case, such darn were no! <br />available. /t wa.c ther'ejore nece.csnry to use the re.culls ojregionn! non/rcer that hove been performed jar the entire <br />State ojColorndo. <br />From these nna/uses, the jollo+ving maximum allowable instream m[nl ammonia conarntratlon.r below dre di.cchurge <br />hove been estimated. <br />Tab/e ///-2 -- Maximum Allowable /nstream Total Ammonia, mR/~ as N (Chronic Conditions) <br />Month Concentration, mgf~ Month Concentration, mg/~7 <br />Jnn 6.0 Ju! l1 <br />Feb 4.8 Aug l1 <br />Mar 2.8 Sep 1.1 <br />Apr 2.0 Oct !. l <br />hlnp l.5 Nov 1.8 <br />Jun l.3 Dec 5.1 <br />Ejjluenr lbnitntions bn.cerl upon the ollo+rnble in.ctreum torn/ ammonia concenn ation.c /i.cted in dre above table are <br />discu.ased in section V/.A. <br />B. Receiving Wafer Data <br />/. uali Waster ganlity dam jor the {Yillinm.c Fork River are mnilnhle jran sampling ~°onducted by the pennittee in the <br />application jar renewal, doted June 29, 1990. The.rrrmples were mken on ,Ylav 3l, 1990. The data are.cltown in Treble <br />///-3. <br />