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• . <br />12 <br />5) If water from the BMRI laboratory is used again, the final DI water should <br />be used. <br />6) The collection of all field data in permanent ink in a 5eld notebook with <br />bound, numbered pages is preferable to the use of loose 5eld data collection <br />sheets with information written in pencil. <br />7) Check samples with pH paper before shipping to ensure that they were <br />preserved to the proper pH. <br />8) Samples for nitrate+nitrite and total phosphorous determination should be <br />preserved with sulfuric acid to pH c2. <br />9) QA/QC procedures such as a cyanide spike recovery analysis should be <br />performed on samples from the collection pond to determine if analytical <br />interferences are present. <br />10) Samples that have cyanide concentrations above detection should have <br />nitrate+nitrite and fatty acid determinations. <br />11) Clear up the confusion about which analytes and field parameters are to be <br />determined in the process point samples (tailings and collection ponds). <br />12) Determine the composition of the greenish precipitate in the process point <br />locations and evaluate whether it will cause analytical interferences with the <br />determination of cyanide; take matched (either total or dissolved) samples for <br />total and WAD cyanide and metals; determine cyanide on both filtered and <br />unfiltered samples from the process points for the next third-party monitoring. <br />13) Consider determining the following additional parameters: total metals in <br />groundwater samples if unfiltered iron is significantly greater (>+20%) than <br />filtered iron; sulfide, anions, and the full list of metals in process point <br />samples; any important constituents in reagents or the ore/waste rock that are <br />not included in the list of analyzes. <br />14) Retain another laboratory or change the timing of sampling in the MOU if <br />Core Laboratories cannot meet a shorter turnaround time. <br />RCG/Hagler, Bailly, Inc <br />