HYDRO20042

• Permit No: M2001063
• IBM Index Class Name: Hydrology
• Doc Date: 8/7/2003
• Doc Name: Water Sample Report
• From: Midas Mining Company Inc.
• To: DMG
• Media Type: D
• Archive: No

ACiZ Laboratories, Inc.
Batch A distinct set of samples analyzed at a specifc time
Found Value of the QC Type of interest
Limit Upper limit for RPD, in %.
Lower Lower Recovery 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
PQL Practical Duantitation Limit, typically Slimes the MDL.
QC 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, mgMg)
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) LCSWD Laboratory Control Sample -Water Duplicate
ASD Analytical Spike (Post Digestion) Duplicate LFB Laboratory Fortified Blank
CCB Continuing Calibration Blank LFM Laboratory Fodified Matrix
CCV Continuing Calivation Venfcation standard LFMD Laboratory Fodifed Matrix Duplicate
DUP Sample Duplicate LRB Laboratory Reagent Blank
ICB Initial Calibration Blank MS Matrix Spike
ICV Initial Calibration Venfcetion standard MSD Matnz Spike Duplicete
/CSAB Inter-element Conection Standard - A plus B solutions PBS Prep Blank -Soil
LCSS Laboratory Control Sample -Soil PBW Prep Blank -Water
LCSSD Laboratory Contml Sample -Soil Duplicate PQV Pmctical Cuanlitation Verification standard
LCSW Laboratory Contml Sample -Water SDL Serial Dilution
Blanks Verifies [hat there is no or minimal wntamination in the prep method or calibration procedure.
Control Samples Verifies the accuracy of the method, including th e prep procedure.
Duplicates Verifies the precision of the instrument and/or method.
Spikes/Fortified Matrix Determines sample maldx interferences, 'If any.
Standard Verifies the validity of the calibration.
• ~ .
B Analyte concentration tletecte0 at a value between MDL and PQL.
H Analysis exceeded method holtl 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 indicatetl MDL
V High blank data accepted because sample concentration is 10 times higher than blank concentration
W Poor recovery for Silver quality cenaol is accepted because Silver offen predpitates with Chlodde.
X puality control sample is out of control.
Z Poor spike recovery is accepted because sample concentration is four Umes 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 Determinaton 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) pC results calculated from raw data. Results may vary slightly if the rountletl values are used in the calculations.
(2) Soil, Sludge, antl Plant matdces for Inorganic analyses are reported on a dry weight basis.
(3) Animal matrices for Inorganic analyses are reported on en "as received" basis.
REPIN03.11.00.01
LA 1791: Page 6 of 10