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Region VIII Guidance for Acute Whole Effluent Reporting <br />• ;RMITTEE NAME: Western Fuels Co. STTE ID: New Horizon Mine OUTFACE NO: 007 <br />50% MORTALITY TEST: X Pass Fail LC50: >I00%. <br />TEST (AnrmaUflge): Ceriodaphnia <24 hours. <br />DATE/TII14E TEST BEGAN: 3/27/2002 12:50 pm <br />SAMPLE (Date/lypeJ: 3/26/2002 Grab. <br />DATE/TIME TEST COMPLETED: 3/29/2002 1:25 pm <br />Survival Totals <br />Dilutions (% Effluent) <br />Recoa Receiving 6.25% ° <br />Water Water 12.5 /0 25 /0 50 /0 100 /° <br />Initial 20 na 20 20 20 20 20 <br />24 hrs 20 na 20 20 20 20 20 <br />hrs 20 na 20 ZO 19 20 1R <br />Maa/Miu Values <br />Dilutions (% Effluent) <br />Recon Receiving 6.25% 12.5% 25% ° ° <br />Water Water 50 /0 100 /o <br />Dissolved Oaygeu 7.1/6.9 na 7.1/6.7 6.9/6.6 6.9/6.5 7.0/6.6 7.1/6.3 <br />Temnerah~re f°('1 20 0/19 0 na 20.0/19 0 20 0/19 0 20 0/19 0 20 0/19 0 20 0/19 0 <br />Receiving Water used for Dilution? (Y of N) N <br />Hardness, mg/L CaCO3: Receiving Water na Recon Water 184 EBluent 2,504 <br />Initial Total Residual Chlorine, mg/L CIZ 100% Efflaeat: <0.05 <br />Reconstituted pH: Initia18.24 Auer 24 hours 8.18 <br />Receiviag Water pH: Initial na A[ler 24 hours na <br />pH in 100% Etflueat: Initia17.79 Mier 24 hours 8.08 <br />Ammonia as N, mg/L: 100% Effluent Initial 0_98 Receiving Water na Recon Initial <0.05 <br />Conductivity, umhas/cm: 100% Effluent 3 990 Receiving Water na <br />Alkalinity, mg/L CaCO3: 100% Eftlueut 394 Receiving Water na <br />Analyst: Lee Bowlines Laboratory: Water & Environmental Testine, Inc. <br />Signature: ;~ ~/~~y <br />x' <br />t <br />Page 5 of 9 <br />Date: 7~jZ- <br />