Laserfiche WebLink
~ ~ v ~ l~~ ~~~ ... i L l J V J- I J. J' J ~~ ~, i~~ 7 ~. I~ v a i~ V V V V I V J <br />• • <br />9. Page 7: Procedural deviations should be noted directly noted on the <br />chain of custody form <br />10. The preservation protocol for samples involves both acid (for metals) <br />- - and base (for cyanide) and this is always a source of potential error since - - <br />acidification of samples for cyanide analysis will irtvalidatc thcir usc. It <br />would he a useful error check to have the laboratories receiving the <br />samples for analysis run a pH check on them as a check•in adjunct to <br />assure no mix-up in preservation even before the analyses begin. Any <br />such errors would then be recorded immediately on the record sheets and <br />correct samples requested. <br />il. Page 8: Suggest that an additional copy of the chain of Custody <br />paperwork also be attached to the outside of the cooler in a protective <br />envelope to guard against destruction of this document if the inside iplastic <br />envelope leaks and admits ice water. <br />12. Is adequate delivery in place to get the samples from San Luisi to the <br />tab sites as required? How will this transport be done? <br />13. Page 9: What "corrective measures" can be taken to bring sample <br />"within control limits"7 Will it impact the sample integrity (for exa»hple, if <br />the ryanide supple were inadvcrtcntly acidified and then treate{l with-___-.___ <br />caustic to give the "correct" pH, the sample is no longer valid for cyanide <br />analyses even though "corrective measures" were taken to meet the target <br />pH in the sample)?. <br />14. Page 28: The tailing and collection pond samples may be the ones <br />where representative sampling is hardest to achieve and yet these aal~e the <br />most critical samples with respect to safety issues surrounding toxic with <br />potential to leak into the surrounding environment. Maximum stimple <br />frequenry and assurance of timely transmittal of these results to all <br />pertinent parties is critical to the intent of this plan. <br />15. Page 29: Yn taking samples for ryanide analyses, it is important to <br />_- _ __ - avoid aeration of the sample during collection and transfer in or~cr to <br />- -- avoid volatilization losses of ryanide. This is not addressed specificdlly in <br />- - --- the plan. <br />- - 16. Page 34.; Who will see the reported analytical data and in what time <br />frame with respect to the time the samples were taken and an lyses <br />performed? This is a central issue in the performance of BMR pr or to <br />the NOV and should be fully resolved as a part of the sampling pl to <br />---- comply with Abatement Requirement 12. The transmission of data sQ~Uid <br />__- ____ - include the appropriate State authorities as well as Conservanry District <br />personnel and their consultants. <br />_ _ 17. TABLE 3: If there is arty sign of leakage from the impoundrdents, <br />then the frequenry of sampling and analyses should increase immediately <br />to monitor the conditions until recovery is demonstrated. <br />-- - - ~ <br />=^ _ _ .. <br />