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W.E. T. rnc. <br />Waler & Environmenlat Teslin¢ Inc. 399 West /200 Nor/h. 8 Orem, Ulah 81057 (80/1235-79~/ Fax1801)235-9560 <br />Acute Whole Effluent Toxicity Report <br />Fathead Minnow <br />DATE: June 23, 1998 <br />• <br />PERMITTEE NAME: Western Fuels Co. SITE ID: New Horizon Mine OUTFACE NO: 007 <br />TEST (Animal/Age): Fathead Minnow, 8 days. SAMPLE (Dare/Type): 6/17/98 Grab. <br />DATE/TIME TEST BEGAN: 6/18/98 4:30 p.m. DATE/I'IME TEST COMPLETED: 6/22/98 4:15 p.m. <br />TEST CONDITIONS <br />Fathead Minnow larvae were exposed to diluted effluent as specified by the permit. At the end of the test period Survival was <br />measured to determine if Acute Toxicity was present in the sample. <br />Animal Age at Test Start <br />Number of Orgaoisms/Dilutioo Volume/Replica[es <br />Foad <br />Aeration <br />DiSSOlved Oxygea <br />Water Replacement <br />Temperature <br />Photo Period <br />SUMMARY <br />pH <br />Dilution Water <br />Receiving Water <br />Sam le Conceutt <br />Fathead Minnow, 8 days. <br />10 organisms/I50 mU2,replicates <br />Fed before starting test and at 48 hours, newly hatched <br />brine shrimp. <br />None required. <br />Measured daily old/new. <br />Renewed daily. <br />20 + I degrees C. <br />16 hours light 8 hours dark. <br />Measured initially and at 24 hours. <br />Reconstituted water (±I S hazdness of the receiving <br />water). <br />None was supplied. <br />Results: X Pass Fail <br />There was NO significant effect on survival. <br />Enclosed are data sheets and statistical reports. <br />Sincere) <br />/~~ <br />/~ee Rawlings <br />• // Water & Environmental Testing, Inc. <br />Y Enclosure <br />JU,4~ 7 Q _:.. <br />