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Region VIII Guidance for Acute Whole Effluent Reporting <br />•; ERMITTEE NAME: Western Fuels Co. SITE ID: New Horizon Mine UUTFALL NO: 007 <br />50% MORTALITY TEST: X Pass Fail LC50: >100%. <br />TEST (Anima!/Age): Ceriodaphnia <24 hours. SAMPLE (Dare/Type): 6/17/98 Grab. <br />DATE/1'IME TEST BEGAN: 6/18/98 11:40 a.m. DATE/TIME TEST COMPLETED: 6/20/98 11:45 a.m. <br />Survival Totals <br />Dilutions (% Effluent <br />Recon Receiving <br /> 6.25% 12.5% 25% 50% 100% <br />Water Water <br />luitial 20 na 20 20 20 20 20 <br />24 hrs 20 na 20 20 20 20 20 <br />4R hrs 20 na 20 20 20 20 20 <br />Max/Min Values <br /> Dilutions (% Effluent) <br />Recon Receiving 6.25% 12.5% 25% 50% 100% <br />Water Water <br />Dissolved O:ygen 7.6/6.9 na 7.8/7.1 7.8/7.0 7.9/7.1 7.7/7.2 7.7/7.2 <br />• Temneratnre (°Cl 71.0/20.0 na 21.0/20.0 21.0/20.0 21.0/20.0 21.0/20.0 21.0/20.0 <br />Receiving Water used for Dilution? (Y of ~ N <br />Hardness, mg/L CaCO3: Receiving Water na Recon Water 412 Effluent 1800 <br />Initial Total Residual Chlorine, mg/L CI2 100% Effluent: <0.05 <br />Reconstituted pH: Initial 835 After 24 hours 8.55 <br />Receiving Water pH: Initial na After 24 hours na <br />pH io 100% Effluent: Initial 8.22 After 24 hours 7.99 <br />Ammonia as N, mg/L: 100% Effluent Initial 0.27 Receiving Water na Recon Initial <0.05 <br />Conductivity, umhos/cm: 100% Effluent 2y70 Receiving Water na <br />Alkalinity, mg/L CaCO3: 100% Effluent 296 Receiving Water na <br />Analyst: Lee Rawlins Laboratory: Water & Environmental Testing. Inc. <br />Signature: <br />Date: Z3 <br />• <br />