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C// vs~u C, j v <br />j <br /> cyanide values in the range of 6 . 1-6 .2 ppm. The holdc~ing . <br />r ~~~-~ ' ~'~ <br />~ <br /> time for the Core Lab analysis of wad cyanide was exceeded ~~~( f~~•* rr "' <br />~- <br /> for all the samples. As you know from review of our monthly t• <br /> INCO summary reports and our weekly pond compliance reports, <br /> the on-site analysis of the lower pond, the collectian pond, <br /> and the post detox samples collected on March 20 shoveled <br /> values below our permit limits. Also, the calculated wad N,P ,~ vr~ <br />+~ .r ~~,(( cyanide values are lower than the reported analytical ~ r .~,„~~'~_'"( <br />J <br /> values. Generally, the calculated cyanide values have been ~~ F ~o/r~~ ~~ "r <br />~ <br />~'^ ~' it higher than the analytical values. The elevated valules <br />~~~•~ /f reported by Core Labs are believed to be lab error ors sample <br /> contamination. The analytical results from the following <br /> bi-weekly sampling event conducted on March 30-31 showed no <br /> elevated cyanide levels. <br /> The following information is enclosed: the Core Lab <br /> analytical reports for the March 19-20 bi-weekly samp0.es, <br /> the Core Lab analytical reports for the March 30-31 pKocess <br /> point samples, the calculated cyanide values, the March INCO <br /> summary, and the March 20 on-site daily analysis of the <br /> lower pond and the collection pond. <br />If you have any questions, please call. <br />Sincerely, <br />!^,4Q~lQ .,( ~CoU1 <br />Alana L. Scott <br />Environmental Engineer <br />Enclosures <br />cc: Anne Baldrige <br />Ken Kluksdahl <br />Mike Young <br />