2015-10-27_HYDROLOGY - M1977215

• Permit No: M1977215
• IBM Index Class Name: Hydrology
• Doc Date: 10/27/2015
• Doc Name: Sampling Frequencty Reduction - Groundwarer Moitoring
• From: Rio Grande Silver
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

ADZ Laboratories, Inc. • - - • -
2773 Downhill Drive Steamboat Springs, CO 80487 [phone] 0 - e
Rio Grande Silver, Inc. ACZ Project ID: L26557
..
L26567-01 WG390711 Iron,dissolved M200.7 ICP M3 The spike recovery value is unusable since the analyte
concentration in the sample is disproportionate to the spike
level.The recovery of the associated control sample(LCS
or LFB)was acceptable.
Manganese,dissolved M200.7 ICP M3 The spike recovery value is unusable since the analyte
concentration in the sample is disproportionate to the spike
level.The recovery of the associated control sample(LCS
or LFB)was acceptable.
WG391064 Mercury,total M1631,Atomic Fluorescence Q5 Sample received with inadequate chemical preservation.
Additional preservation performed by the laboratory.
WG390371 Silica,total recoverable M200.7 ICP ZS Digestion procedures have the potential to trigger silica
polymerization and precipitation,leading to low biased
results. Silica chemistry is complex and polymerization
kinetics are unpredictable. Dissolved and/or acid soluble
silica analyses may provide more accurate measurements.
WG390829 Silver,dissolved M200.8 ICP-MS BE Target analyte in continuing calibration blank(CCB)at or
above the acceptance criteria. Target analyte was not
detected in the sample[<MDL].
WG390944 Zinc,dissolved M200.8 ICP-MS M3 The spike recovery value is unusable since the analyte
concentration in the sample is disproportionate to the spike
level.The recovery of the associated control sample(LCS
or LFB)was acceptable.
WG391353 Zinc,total recoverable M200.8 ICP-MS M3 The spike recovery value is unusable since the analyte
concentration in the sample is disproportionate to the spike
level.The recovery of the associated control sample(LCS
or LFB)was acceptable.
WG390665 Carbon,dissolved organic(DOC) SM5310B RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<10x MDL).
WG390370 Chemical Oxygen Demand M410.4 RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390390 Chloride M300.0-Ion Chromatography RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390605 Fluoride SM450OF-C RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDQ.
WG390186 Nitrate/Nitrite as N,dissolved M353.2-Automated Cadmium RA Relative Percent Difference(RPD)was not used for data
Reduction validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
Nitrite as N,dissolved M353.2-Automated Cadmium RA Relative Percent Difference(RPD)was not used for data
Reduction validation because the sample concentration is too low for
accurate evaluation(<10x MDL).
WG390511 Nitrogen,ammonia M350.1 RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<10x MDL).
WG390774 Nitrogen,total Kjeldahl M351.2-TKN by Block Digester RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390578 Phosphorus,total M365.1-Auto Ascorbic Acid RA Relative Percent Difference(RPD)was not used for data
(digest) validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390501 Residue,Non-Filterable(TSS)@105C SM2540D RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390390 Sulfate M300.0-Ion Chromatography RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDL).
WG390634 Total Alkalinity SM2320B-Titration RA Relative Percent Difference(RPD)was not used for data
validation because the sample concentration is too low for
accurate evaluation(<1 Ox MDQ.
SM2320B-Titration RO The duplicate originally assigned to this sample was not
used for precision assessment because residue density
exceeded the method limits. Another duplicate in the batch
was used to assess precision. Method required duplicate
frequency was not met.
REPAD.15.06.05.01
L26557-1510011525 Page 34 of 48