REP32503

• Permit No: C1981008
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: NEW HORIZON 1 AND 2 MINES WET TEST RESULTS
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

1'1' .E. T. Inc.
Water & Environmental Testine Inc. 479 West 50 North. American Fork U[ah 84003 [phone]
•
Acute Whole Effluent Toxicity Report
Ceriodaahreia
DATE: March 13, 1996
PERMT['I'EE NAME: Wcstem Fucls-Colorado (New Horiwn Mine) NPDES NO:
TEST (AnimallAge): Ceriodaphnia <24 hours.
DATE/I'I11~fE TESL' BEGAN: 3/08/96 6:30 p.m.
TEST CONDTI'IONS
OUTFACE NO: 001
SAMPLE (DatelType): 3/07/96.
DATF./P111fE TEST COMPLETED: 3/10/96 5:45 p.m.
Ceriodaphnia dubia neonates were exposed to diluted efllucnt as specified by permit. Survival al the end
of [be test period was measured and statistically evaluated for Acute Toxicity.
~J
Mimal Age. at Tesf.Start <24 hours.: I
Number of Organisms/Dilution Volume/Rcplicates 5 organisms/IS mI/4 replicates.
Food .:.: ' : YTC with.Algae(D.1. ml/day)(fed:previous.to.tesi):.,
Aeration None required.
......
'Dissolved Oxygen..:'.. ,.
Measured daily old/new::::.: ;, ;;;' ::.: : . . . .: .: :.: ';.::.
Water Replacement Renewed every 24 hours.
Tempecatrire . ;.. 20 + I degrees C:
Photo Period 16 hours ambient light/8 hours dark.
'.:...: .
casured iniually.and at , houi5..::....' ::. '. '.' .:. .
Dilution Water Reconstituted lab water (±15% hazdness of the
Receiving Water).
. ' .
:
' le was
a1 Can oit':.(Sam supplied fo.:chclKUCa1:::::::
...... ... ..
stet ::
Receivi¢g.R
,:.:..:
,.

ysis but.not:used lotion}; ::.:::::' : ::. .:.:: :....:.:.::
r
ana fo dt
Sample Concentrations Control, 6.25%, 12.5%, 25%, 50%, 100%.
SUMMARY
Results: ' X Pass Fail
There was NO significant effect on survival.
Enclosed aze data sheets and statistical reports.
Sincere)
~~ 1 GL4~`/ ~~
Rawlings
Water & Environmental Testing, Inc.
Enclosure
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