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9 <br />3.2 TOTAL VS. DISSOLVED CONCENTRATIONS IN PROCESS POINT SAMPLES <br />In this and the previous third-party sampling trip both filtered and unfiltered samples were <br />collected at the process point locations and analyzed to determine (1) if there were <br />significant differences between total and dissolved metal concentrations, attd (2) if filtered <br />and total cyanide concentrations differed significantly. Differences in concentrations between <br />filtered and unfiltered samples were discussed in the previous section, and major results for <br />this sampling will be highlighted here. <br />For total cyanide, both the upper and the lower tailings pond had higher concentrations in <br />filtered samples. These two process point locations also had higher WAD cyanide <br />concentrations in filtered samples. These results indicate that there may be a negative <br />analytical interferant in the unfiltered samples. For the collection pond, unfiltered samples <br />had higher WAD and total cyanide concentrations than filtered samples. <br />Colloidal iron and zinc appear to be present in all process point samples, and colloidal <br />copper may be precipitating in the collection pond. Colloidal calcium also appears to be <br />present in the lower tailings pond and the collection pond, most likely as gypsum. These <br />precipitates may interfere with cyanide determinations and adversely affect cyanide recovery <br />rates. <br />33 QUALITY CONTROL ANALYSES AND RESULTS <br />The Quality Control Report is included as Appendix D of this summary report. In some <br />cases Core Laboratories used samples from the second third-party mortoring trip to <br />perform spike and duplicate QA/QC analyses. These samples are marked by an asterisk in <br />Appendix D, and the identity of the sample (e.g., Coll. Pond (un51t)) is also nrbted. All spike <br />and duplicate analyses involving samples from the second third-party monitoring met the <br />required quality control criteria in TR-(1(16. <br />In severs] cases, the report printing is repeated (see Appendix D, margins); therefore, it <br />looks as if more QA/QC analyses were conducted with Battle Mountain Gold samples than <br />actually were. The following samples from the third-party monitoring trip were used for <br />cyanide QA/QC spike analyses: field blank (total cyanide); unfiltered upper tailings pond <br />(total cyanide); unfiltered M-13 (WAD cyanide); unfiltered M-9 (WAD cyanide), and <br />unfiltered RS-5 (WAD ryanide). The following samples were used for cyanide QA/QC <br />delicate analyses: unfiltered M-9 (total cyanide); duplicate unfiltered M-13 (WAD ryanide); <br />unfiltered lower tailings pond (WAD cyanide), and unfiltered RS-5 (WAD cyyanide). <br />The only process point samples used for QAjQC analyses were unfiltered upper tailings <br />pond (for total cyanide spike analysis), and unfiltered lower tailings pond (for WAD cyanide <br />duplicate analysis). The important QA/QC analyses for this project are the total and WAD <br />RCG/Hagler, Badly, Inc <br />