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~- 02/-03/1995 16:08 303-782-0390 CDH WQCD WOCC PAGE 03 <br />COLORADO DEPARTMENT OF NEALThI, Water Quality Control Division <br />Rationale -Page 8. Permlr No. CO-O043tS48 <br />B. Receiving Water Data <br />1. Quality - Quality data for Arequa Gukh arc assailable for stations than were operated by the CYipple C}eek <br />Qc Yicror Mining Company. Station AG! it located ar the spring that will eventually be cossrred by the <br />Arequa Gulch !lock Jrarage Area. wh[ch u upsneam of the proposed Valley Leach Facflity. Station <br />AGI.S is located bebw the proposed (cacti Jaciliry and is also bcnred bebw eslsting potential sources of <br />seepage from historic [ailings. A sum+rrary of the quality data for both statbns is shown in Table /11-2. <br />For staton AGI, the period of record used sns 1987 thru 1992 (52 Samples!. For station AGI. S, the <br />period cared xns 1992-1993 (4 samples). <br />Table III - 2 -- QuoUty of Rtulvlttg Water <br /> Seallo)CAG-1 Stalian AG1.S <br />Parameter tNtgn Yalue Mean Vdlae <br />Discharge, gpm 9.9 22. 7 <br />Temp, 'F 46.3 45.9 <br />pH, su 4.8 6.9 <br />Conductivity, umhos/cm 1,173 1,710 <br />Dissolved O~rygen, mg/l - 7.8 <br />Total Dissolved Solids, mg/! 843 1,250 <br />Alkalinity, mg// at CaCOr 0.0 42 <br />Toro! Amrnoma, mg/l as N 0.0 0,0 <br />Total Hardness, mg// os CaCOr 537 730 <br />Tonal Cyanide. mg/! 0.0059 0.093 <br />Free Cyanide, ntig/! 0.00/3 < 0.05 <br />WAD Cyanide. mg/1 0.0010 0.011 <br /> Mean Method Mears Method <br />Aluminum, ug/I !7,176 D 800 PD <br />Arsenic, ug/I S D < 5 PD <br />Cadmium, ug/I l7 D < 5 PD <br />Chromium, ug/I 3 D 7 PD <br />Copper, ug/I 74 D < S PD <br />Iran, ug/l 192 D SO TR <br />Lead. ug/l 2 D < ~ PD <br />Manganese, ug/1 6,640 D 470 TR <br />Mercury, ug// 0.17 D < 0.I TR <br />Nickel, ugR 80 D < 20 PD <br />Selenium, ug/l 0.0 D G /0 TR <br />Silver, ug/I 1.12 D < 0.4 PD <br />Zinc, ug/! /,883 D 27 PD <br />D -Dissolved PD - Potentially Dissolved TR -Total Recoverable <br />