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04/1J/02 14:24 A s 95804 886 8428 ASCI VANCOUVER ».. P Y HAS ~ ~ OOY/014 Overall, h is readily apparent that the date obtelned for cyanide on the three samples from lyslmeter L3 do not remotery mast any OA criteria end hence little credibility can be pUCetl either on the apparent presence of cyanlde in the wmple or Neir supposed detection Nvels. 3.6 Absence of Pnt a MDL study 3.8.1 Standard protocols le Is normal when dealing whh ssmples which have mevicea to undertake a study whleh determines what effect the matrix might have on the ability of the method to dKea end quantify the apeclec in quettion. Such atudlee, procedures pf which ars mandated and reco0nised by regulatory authorities, are known as method dstettlon Ilmlt (MDL) evaluations or practical quantitation limit IPOL- detarminetione. It is normal for Ppl values to be 2 or more times higher than nominal inetrumentil detection Ilmlt. For example, POL values for many organic epsclas are act by the USEPA end 0.01 mp/L, which might be 2 to 10 times the nominal detection limit by a given analytical protocol, The MDL likely for total cyanide In a complex matrix wfl1 be probably four or more tlmes the analytical detection Ilmit. For exempla, studies by Smith and Mudder submitted to the State of South Dakota eu0pested a POL for cyanltle in aqueow sample of at least 0.02 mp/L with no real carnintY of detection/quantlfieation until twits thin value. It ie apparent thst POL and MDL valuer ars matrix speelfic. Any time the iampls ihstrbt varies from an near Ideal aqueous solution, then It is essential to determine apeclilc POLa or MDIs to have any certainty ac to the validity of the analyses for any cyanide species in that matrix. 3.8.2 Lyclmeter L3 samples No POL or MDL studies were done for any of the lysimeter L3 ssmples. Given the nature of the matr(ces of these samples, described In sections 3.1, 3.2 antl 3.3 above, thin la tantamount to Invalidatin0 the analyses. 4. CONCLUSIONS Based on the detailed synthesis of the Iysimetsr L3 date above, we conclude that the data sets are Invalid. We further conclude that h Is not possible to ssy whether there Is any cyanide In these samples at all.