HYDRO20533

• Permit No: M2001063
• IBM Index Class Name: Hydrology
• Doc Date: 12/9/2002
• Doc Name: Water Sampling
• From: Midas Mining Company Inc.
• To: DMG
• Media Type: D
• Archive: No

/qCZ Laboratories, Inc.
777.4 Downhill Onve Sfnamhaaf Snrinos. CO 80487 /8001 334-
Batch A distinct set of samples analyzed at a specific time
Found Value of the DC Type of interest
Limit Upper limit for RPD, in %.
Lower Lower Rewvery Limit, in % (except for LCSS, mg/Kg)
MDL Method Detection Limit. Same as Minimum Reporting Limit. Allows for instrument and annual fluctuations.
PCN/SCN A number assigned to reagents/standards to trace to the manufacturer's certificate of analysis
POL Practical Quantitalion Limit, typically S limes the MDL.
QC True Value of the Control Sample or the amount adtled to the Spike
Rec Amount of the true value or spike atltled recovered, in % (except for LCSS, mg/Kg)
RPD Relative Percent Difference, calculation used for Duplicate DC Types
Upper Upper Recovery Limit, in % (except for LCSS, mg/Kg)
Sample Value of the Sample of interest
AS Analytical Spike (Post Digestion) LFM Laboratory Fortified Matrix
ASD Analytical Spike (Post Digestion) Duplicate LFMD Laboratory Fortifed Matrix Duplicate
OUP Sample Duplicate LRB Laboratory Reagent Blank
LCSS Laboratory Control Sample -Soil MS/MSD Matrix Spike/Matrix Spike Duplicate
LCSW Laboratory Control Sample -Water PBS Prep Blank -Soil
LFB Laboratory For9fed Blank PBW Prep Blank -Water
Blanks Verifies that there is no or minimal contamination in the prep method procedure.
Control Samples Verifies the accuracy of the method, inGuding the prep procedure.
Duplicates Verifies the precision of the instrument and/or method.
Spikes/Fortifetl Matrix Determines sample matrix interferences, if any.
B Analyte concentration detected at a value between MDL and PQL.
H Analysis exceeded method hold time. pH is a field test with an immediate hold lime.
R Poor spike recovery accepted because the other spike in the set fell within the given limits.
T High Relative Percent Difference (RPD) accepted because sample concentrations are less than 10x the MDL.
U Analyte was analyzetl for but not detected at the intlicated MDL
V High blank data accepted because sample concentration is 10 times higher than blank concentration
W Poor recovery (or Silver quality control is accepted because Silver often precipitates with Chloride.
X Quality control sample is out of control.
Z Poor spike recovery is accepted because sample concentration is four times greater than spike concentration.
(1) EPA 600/4-83-020. Methods for Chemical Analysis of Water and Wastes, March 1983.
(2) EPA 600/R-93-100. Methods for the Determination of Inorganic Substances in Environmental Samples, August 1993.
(3) EPA 600/R-94-111. Methods for the Determination of Metals in Environmental Samples -Supplement I, May 1994.
(5) EPA SW-846. Test Methods for Evaluating Solid Waste, Third Etlition with Update III, December 1996.
(6) Standard Methods for the Examination of Water and Wastewater. 19th edition, 1995.
(t) QC results calculated from raw data. Results may vary slightly H the rountletl values are used in the calculations.
(2) Soil, Sludge, antl Plant matrices for Inorganic analyses are reported on a dry weight basis.
(3) Animal matrices for Inorganic analyses are reported on an "as receivetl" basis.
REPIN03.11.00.01
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