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Region VIII Guidance for Acute Whole Effluent Reporting <br />• PERMITTEE NAME: Western Fuels Colorado SITE m: New Horizon Mine OUTFACE NO: 007 <br />50% MORTALITY TEST: X Pass Fail LC50: > 100%. <br />TEST (Anima!/AgeJ: Ceriodaphnia Q4 hours. <br />DATE/f1ME TEST BECAN: 9/17/98 12:00 p.m. <br />SAMPLE (DaleJType): 9/16/98 Grab. <br />DATE/1'IME TEST COMPLETED: 9/19/98 2:30 p.m. <br />Survival Totals <br />Dilutions (% Effluent) <br />Recon Receiving 6.25% 12.5% 25% 50% ° <br />Water Water 100 /o <br />luitial 20 na 20 20 20 20 20 <br />24 hrs 20 na 20 20 20 20 20 <br />dR hrs 20 na 20 20 20 20 IS <br />Max/Miu Values <br />Dilutions (% Effluent) <br />Recon Receiving 6.25% 12.5% 25% 50% 100% <br />Water Water <br />• <br />Dissolved Orygeo 7.5/7.1 na 7.5/7.3 7.3/7.2 7.4/7.2 7.4/7.1 8.0/7.1 <br />Temperature !°(a 21.0/19.8 na 21.0/19.8 21.0/19.8 21.0/19.8 21.0/19.8 21.0/19.8 <br />Receiving Water used for Dilution? (Y of ~ N <br />Hardness, mg/L CaCO3: Receiving Water na Recon Water 384 Effluent X648 <br />Initial Total Residual Chlorine, rog/L CI2 100% Effluent: <0.05 <br />Reconstituted pH: Initial 8.32 After 24 hours 8.66 <br />Receiving Water pH: initial na After 24 hours na <br />pH in 100% Effluent: initial 7.43 After 24 hours 8.05 <br />Ammonia as N, mg/L: 100% Efilueot initial .45 Receiving Water na Recon Initial <0.05 <br />Conductivity, umhos/cm: 100% Effluent 2y60 Receiving Water na <br />Alkalinity, mg/L CaCO3: 100% Effluent 308 Receiving Water na <br />Analyst: Lee RawlinQS Laboratory: Water & Environmental Testing, Inc. <br />Signature: <br />Date• 27- c~ <br /> <br />