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<br />13 <br />• ~e S Check samples before shipping to ensure that they were preserved to the <br />proper p~~y) <br />• y~ Samples for nitrate+nitrite and total phosphorous determination should be <br />preserved with sulfuric acid to pH <2 <br />• ~ , ~ Send duplicate samples to a second independent laboratory ~ , ~~a , r• <br />• J,41iJse a performance evaluation standard for cyanide ~r.,l',.: ~~" ~f~~ <br />p ~-- • Clear up the confusion about which analyzes and field parameters are to be <br />/`~ ~ ~,, ~ ~ . G determined in the process point samples (tailings and collec>Von ponds) <br />f ~ ~h ~~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 <br />~N~ ~~J ~.etermine the following constituents on a less frequent time frame: silica; <br />/ radio chemistry; oil and grease; total organic carbon; total dissolved solids, and <br />total suspended solids <br />n~v ~ y~ ~ • Consider determining the following additional parameters: total metals in <br />' ~~Y'""s 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 analytes <br />• ~l~f Retain another laboratory or change the timing of sampling in the MOU if <br />Core Laboratories cannot meet a shorter turnaround time <br />• Q'u~~Do not add cadmium nitrate to samples in the field <br />•~Make an inventory of all possible sources of cadmium at the site, at a <br />minimum by mapping all potential cadmium source materials and indicating <br />transport along potential hydrologic flow paths to the monitoring locations <br />with elevated cadmium concentrations. <br />RCG/Hagler, Bailiy, Inc <br />