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<br />COLORADO DF_PARTMEPIPOF HEALTH. N'nrcr Quality G~ntrol Division <br />Rnrinnrdr - Prr,cr I?. Permit No. CO-00.42638 <br />Outjnll 006, containing spoiir spring water, is a continuorts discharge. As done in the previorcr prrnur, <br />~.vrter quality-bated egIuem limitations were considered nr Outfn!! 006. The en/culntrrl ~.~nrer qunlin•- <br />bnscd effluent limitations are presented in Table VI-6. <br />Far the parameters shown in Table V/-3, the mass balance equation shown in V/-A.5 kas used to cnlculare <br />the allowable effluent limitations that would not cause the inter quality standards to be violated jot the <br />discharge that enters unnamed tributaries to Trout Creek (Outfall 006J. These limitations are shown as <br />the values jot M= in Table V/-6. The values jot Qt, Qt and Qr for chronic and acute (imitations, taken <br />from section II1. 8.2. ojthis rationale, and used in the ca~ulations for water quality limited parameters <br />are: <br />Table VI-S (Low flaw of Unnamed tributaries to Trott( Crtek) <br />Qr 6.0 cfs <br />Qt 3.071 cfs <br />Qf 9.071 cfs <br />Values for Q2, the average daily effluent flow, were calculated from the reported flows on the se(f- <br />monitoring reports for OutfaU 006. <br />Values for Mr and MJ vary depending on the background stream quality data (MfJ and the applicable <br />inter quality standard (M~. As discussed in Section 1/LB.I of this rationale, background data was not <br />available for this exercise and values for MI were assumed to be zero. There values are also shown in <br />Table Vl~ along with the calculated efj7uem B»dtations (M~ for Outfall 006. <br />Table VI-6 -Summary of Mass Balance Cakrtlations <br />Parameter ;: ;.:"-: •Sttrgiii Standa7il;'fM3I;?:.: ':E,(JluliU::C6nceirftiatioti, (M2), <br />-. , <br />Ante/Chmttic..: ::..::: ':: .; :.'.:.A..cut[Claroirc::.:::.. <br />TRC, mg/! 0.003 0.009 <br />Arsenic (T), ug/l SO/IOD 147.7/295.4 <br />Cadmium (PDJ, ug/l . 12.[3/1.31 35.8/3.9 <br />Copper (PDJ, ug/! 2!.06/13.82 62.2/40.8 <br />/ton (PDJ, ug/l NA/3AD NA/886.1 <br />Lead (PD), ug/[ 50/5.04 147.7/14.9 <br />Manganese (PDJ, ug/l NA/50 NA/147.7 <br />Mercury (I), ug/l 2.4/0.01 7.1/0.03 <br />Nickel (PDJ, ug/! /059.3/109.78 3129/324.3 <br />Silver (PDJ, ug/1 2.78/0.45 8.2/1.3 <br />Zinc (PD), ug/l /36.57/123.7 403.4/365.4 <br />Sulfate, mg/l 250 738.4 <br />(TJ: Tota <br />(PDJ: Potentially Dissalve~ <br />