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<br />' RESPONSE: It is proposed that procedural deviations be recorded in the field notebook. BMR <br />believes that it would be overly cumbersome to try to note procedural deviations <br />on the chain-of-custody form. The chain-of-custody form is simply a form that <br />documents the person who is responsible for the samples at any point in time <br />from the time the sample bottles leave the laboratory until the samples are <br />' returned to the laboratory. It is not meant to be a field notebook to note other <br />procedures related to the sample collection and/or handling. <br />' 10. 7Tte preservation protocol for samples involves both acid (for »reralsJ mrd base <br />(for cyattideJ, and !ltis is always a source of potential error, since acidification <br /> of samples for cyanide analysis will invalidate t/reir use. It would be a useful <br /> error c)teck to have the laboratories receiving the samples for atrplysis run a pH <br /> check on them as a check-in adjunct to assure no mix-up in pr~servntion even <br /> before the analyses begin. Any such errors would dren be recorded immediately <br />' on the record sheets and correct samples requested. <br /> RESPONSE: This is current standard operating procedure for the analytical laboratory (Accu- <br />' Labs) prior to conducting the BMR sample analyses (or any sample analysis). <br /> 11. Poge 8: Suggest that an additional copy of the chain-of-custody pnpenvork also <br />' be attached to -he outside of the cooler in a protective envelope tm guard against <br /> destruction of this document if the inside plastic envelope Jenks and admits ice <br /> <br />' water. <br /> RESPONSE: The chain-of-custody form is typically taped to the upper lid of th@ cooler and we <br />' have not experienced any problem with having chain-of-custody paperwork <br />BMR believes that this is unnecessary <br />destroyed <br />Therefore <br /> . <br />, <br />. <br />' 12. Is adequate delivery in place to get the smrtples from San Luis to the lab sites as <br />required? How will this transport be done? <br />' RESPONSE: Yes, adequate delivery is in place, as all samples have been delivered to the <br />laboratory within the prescribed holding times. Tliis transport is done by ground <br />transport, using Halepaska and Associates, Inc. personnel tohand-deliver samples <br />' to Accu-Labs. <br />13. Page 9: What "corrective measures" cmt be token to bring smnple "wi[hin <br />' control limits"? ill i! impact the sample integrity (for exmnple, if the cyanide <br />sample were inadvertently acidified and then treated with caustic to give the <br />"correct" pH, the sample is no longer valid for cyanide analysac, evert tlroug)t <br />' "corrective measures" were taken to meet t/ie target pH in t/re sp»rpleJ? <br />' -18- <br /> <br />1 <br />