HYDRO29270

• Permit No: C1981022
• IBM Index Class Name: Hydrology
• Doc Date: 5/15/1995
• Doc Name: SOMERSET MINING CO EFFLUENT AND SPRING WATER CHARACTERIZATION
• Permit Index Doc Type: DMG SAMPLING
• Media Type: D
• Archive: No

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TRIMMED SPEARMAN-KARBER METHOD. MONTANA STATE UNIV
FOR REFERENCE, CITE:
HAMILTON, M.A., R.C. RUSSO, AND R.V. THURSTON, 1977.
TRIMMED SPEARMAN-KARBER METHOD FOR ESTIMATING MEDIAN
LETHAL CONCENTRATIONS IN TOXICITY BIOASSAYS.
ENVIRON. SCI. TECHNOL. 11(7): 714-719;
CORRECTION 12(4):417 (1978).
DATE: 10/93 TEST NUMBER:
CHEMICAL: EFFLUENT
RAW DATA:
CONCENTRATION(o) 12.50 25.00
NUMBER EXPOSED: 20 20
MORTALITIES: 1 0
SPEARMAN-KARBER TRIM: 2.500
SPEARMAN-KARBER ESTIMATES: LC50:
95% LOWER CONFIDENCE:
95% UPPER CONFIDENCE:
DURATION: 48 HOURS
SPECIES: C.DUBIA
50.00 75.00 100.00
20 20 20
3 17 20
59.44
53.15
66.47
NOTE: MORTALITY PROPORTIONS WERE NOT MONOTONICALLY INCREASING.
ADJUSTMENTS WERE MADE PRIOR TO SPEARMAN-KARBER ESTIMATION.
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