2021-12-22_REVISION - M2012032

• Permit No: M2012032
• IBM Index Class Name: Revision
• Doc Date: 12/22/2021
• Doc Name Note: Request for Tailings Placement for the Revenue Mine
• Doc Name: Request for Tailings Placement for the Revenue Mine
• From: Ouray Silver Mines, Inc
• To: DRMS
• Type & Sequence: TR15
• Email Name: LJW
• Email Name: THM
• Email Name: ACY
• Media Type: D
• Archive: No

ACZ Laboratories, Inc. • • - • - •
2773 Downhill Drive Steamboat Springs, CO 80487 [phone] WOM Hm".?- • •
Ouray Silver Mines ACZ Project ID: L69171
METHOD OCRIPTION
WG531173 Phosphorus,Total(1312-DI) M365 1-Auto Ascorbic Acid HD Analysis is outside the intended scope of the method,which
(digest) does not provide hold time information for soil extracts No
hold time is observed for collection to extraction The
referenced method hold time is observed for extraction-to-
analysis
M365.1-Auto Ascorbic Acid RA Relative Percent Difference(RPD)was not used for data
(digest) validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
WG530712 Potassium(1312) M6010D ICP ZG The ICP or ICP-MS Serial Dilution was not used for data
validation because the sample concentration was less than
50 times the MDL
WG530627 Residue,Filterable(TDS)@180C(1312) SM2540C N1 See Case Narrative
SM2540C RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
WG531061 Residue,Non-Filter(TSS)@180C(1312-SM2540D RA Relative Percent Difference(RPD)was not used for data
DI) validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
SM2540D Z3 Sample volume yielded a residue less than 2 5 mg
WG530915 Selenium(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL).
Silver(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG530712 Sodium(1312) M6010D ICP RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG532073 Sulfate(1312-DI) M300 0-Ion Chromatography HD Analysis is outside the intended scope of the method,which
does not provide hold time information for soil extracts No
hold time is observed for collection to extraction The
referenced method hold time is observed for extraction-to-
analysis.
WG532185 Sulfur Organic Residual M600/2-78-054 3 2 4-MOD RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
Sulfur Pyritic Sulfide M600/2-78-054 3 2 4-MOD RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
Sulfur Sulfate M600/2-78-054 3 2 4-MOD RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL).
Sulfur Total M600/2-78-054 3.2 4-MOD RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG530915 Thallium(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG530712 Tin(1312) M6010D ICP RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
WG530612 Total Alkalinity SM2320B-Titration Q6 Sample was received above recommended temperature
WG532185 Total Sulfur minus Sulfate M600/2-78-054 3 2 4-MOD RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG530915 Uranium(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
Vanadium(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
Zinc(1312) M6020B ICP-MS RA Relative Percent Difference(RPD)was not used for data
validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
REPAD.15.06 05.01
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