HYDRO22307

• Permit No: M2001063
• IBM Index Class Name: Hydrology
• Doc Date: 8/26/2002
• Doc Name: Hydrology Requirement
• From: Midas Mining Company Inc.
• To: DMG
• Media Type: D
• Archive: No

ACZ
Laboratories,
Batch A distinct set of samples analyzed at a specifc time
Found Value of the DC Type of interest
Limit Upper limit for RPD, in %.
Lower Lower Recevery Limit, in % (except for LCSS, mg/Kg)
MDL Method Detection Limit. Same as Minimum Reporting Limit. Allows for instrument antl annual fluctuations.
PCN/SCN A number assigned to reagents/standards to trace to the manufacturer's certificate of analysis
POL PraIXicel Quantitation Limit, typically 5 times the MDL.
OC True Value of the Control Sample or the amount added to the Spike
Rec Amount of the true value or spike added recovered, in % (except for LCSS, mg/Kg)
RPD Relative Percent Difference, calculation used for Duplicate OC 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 Matdx
ASD Analytical Spike (Post Digestion) Duplicate LFMD Laboratory Fortified Matrix Duplicate
DUP Sample Duplicate LRB Laboratory Reagent Blank
LCSS Laboratory Control Sample • Soil MS/MSD Matriz Spike/Matrix Spike Duplicate
LCSW Laboratory Control Sample -Water PBS Prep Blank -Soil
LFB Laboratory Fortified Blank PBW Prep Blank -Water

Blanks Verifies that there is no or minimal contamination in the prep method procedure.
Control Samples Vedfies the accuracy of the method, inGuding the prep procedure.
Duplicates Vexes the precision of the instrument and/or method.
Spikes/Fortified Matrix Determines sample matdx interterences, if any.
B Analyte concentration detected at a value between MDL and PDL.
H Analysis exceeded method hold time. pH is a field test with an immediate hold time.
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 analyzed for but not detected at the indicated MDL
V High blank data accepted because sample concentration is 10 times higher than blank concentration
W Poor recovery for Silver quality wntrol is accepted because Silver often precipitates with Chloride.
X Quality control sample is out of control.
Z Poor spike recovery is accepted because sample cencenUation is four times greater than spike concentration.
(1) EPA 60014-83-020. 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 Edition with Update III, December 1996.
(6) Standard Methods for the Examination of Water and Wastewater, 19th edition, 1995.
(1) OC results calculated from raw data. Results may vary slightly if the rounded values are used in the calculations.
(2) Soil, Sludge, and Plant matrtces for Inorganic analyses are reported on a dry weight basis.
(3) Animal matdces for Inorganic analyses are reported on an "as received" basis.
REPIN03.11.00.01
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