2022-07-22_HYDROLOGY - M2012032

• Permit No: M2012032
• IBM Index Class Name: Hydrology
• Doc Date: 7/22/2022
• Doc Name: Water Monitoring - Groundwater
• From: Ouray Silver Mines, Inc.
• To: DRMS
• Annual Report Year: 2021
• Report Quarter_Month: 2
• Email Name: LJW
• Email Name: THM
• Media Type: D
• Archive: No

ADZ Laboratories, Inc. • - • - •
2773 Downhill Dnve Steamboat Spnngs, CO 80487 [phone] WOTM. f s
Ouray Silver Mines ACZ Project ID: L73468
L73468-01 NG543264 Chloride SM4500CI-E 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)
WG543637 Cyanide,total M335 4-Colonmetric w/ RA Relative Percent Difference(RPD)was not used for data
distillation validation because the concentration of the duplicated
sample is too low for accurate evaluation(<1 Ox MDL)
WG543670 Fluoride SM450OF-C M2 Matrix spike recovery was low,the recovery of the
associated control sample(LCS or LFB)was acceptable
WG543610 Nitrate/Nitrite as N M353 2-H2SO4 preserved 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).
W G543596 Phosphorus,total 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(<10x MDL)
WG543258 Residue,Filterable(TDS)@180C 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(<10x MDL).
WG543353 Residue,Non-Filterable(TSS)@105C SM2540D 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).
SM2540D Z3 Sample volume yielded a residue less than 2.5 mg
L73468-02 NG543264 Chloride SM4500CI-E 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)
WG543637 Cyanide,total M335 4-Colorimetric w/ RA Relative Percent Difference(RPD)was not used for data
distillation validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL)
WG543670 Fluoride SM450OF-C M2 Matrix spike recovery was low,the recovery of the
associated control sample(LCS or LFB)was acceptable
WG543610 Nitrate/Nitrite as N M353 2-H2SO4 preserved 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)
W G543596 Phosphorus,total 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(<10x MDL).
WG543258 Residue,Filterable(TDS)@180C 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(<10x MDL)
WG543353 Residue,Non-Filterable(TSS)@105C SM2540D 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)
SM2540D Z3 Sample volume yielded a residue less than 2 5 mg
L73468-03 NG543264 Chloride SM4500CI-E 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).
WG543637 Cyanide,total M335 4-Colonmetric w/ RA Relative Percent Difference(RPD)was not used for data
distillation validation because the concentration of the duplicated
sample is too low for accurate evaluation(<10x MDL).
WG543670 Fluoride SM450OF-C M2 Matrix spike recovery was low,the recovery of the
associated control sample(LCS or LFB)was acceptable
WG543610 Nitrate/Nitrite as N M353 2-H2SO4 preserved 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)
WG543596 Phosphorus,total 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(<10x MDL)
WG543258 Residue,Filterable(TDS)@180C 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(<10x MDL)
WG543353 Residue,Non-Filterable(TSS)@105C SM2540D 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).
SM2540D Z3 Sample volume yielded a residue less than 2 5 mg
REPAD.15.06.05.01
L73468-2206151327 Page 19 of 24