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1992-04-22_REVISION - M1988112
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1992-04-22_REVISION - M1988112
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Entry Properties
Last modified
6/19/2021 4:26:26 PM
Creation date
11/21/2007 11:48:38 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
REVISION
Doc Date
4/22/1992
Doc Name
MINUTES MLRB
Type & Sequence
AM1
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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• <br />Minutes, Rpril 22-23, 1992 <br />~}~ DR~iFT <br />Subject To Board Approval 23 <br />reported dead ducks near the ponds on 2 occasions. At that time, the <br />operator was using propane canons and a guard armed witn a shotgun to <br />haze wildlife to keep it away from the ponds. Staff said Mr. Dodson <br />stated that Conrad Albert, ith the Division of Wildlife, had inspected <br />the mine area and was satisr~ed with the steps taken by the operator to <br />protect wildlife. <br />Staff said Mr. Albert was contacted by the Division, regarding his <br />inspection. Mr. Albert had reported that the DOW received a dead sea <br />gull by an anonymous individual who alleged that it was obtained from <br />near the mine. Mr. Albert had the specimen tested, but did not find <br />any cyanide. However, DOW felt the test was incomplete and ordered a <br />hystopath test on the sea gull. That test has not yet been completed. <br />Staff said that a few days after the inspection, the Division received <br />a call from Andre Duchane, the operator's manager for IJorth American <br />operations. Mr. Duchane reported 2 dead ducks by the ~:ailings pond, <br />but stated that the cause of death had not been determined. <br />Staff said that during the inspection, Mr. Lewis stated that the <br />operator was not required to analyze tailings and collection pond water <br />for cyanide. Staff referenced information contained in Exhibit A and <br />stated that the San Luis project monitoring requirements submitted to <br />the Division states that "...chemical analysis of the collection pond <br />seepage on a quarterly basis for the parameters identified in Table G <br />1-2 of the approved permit will be performed". Staff paid the table <br />lists total and free cyanide as parameters for which testing would be <br />conducted during 2 quarters of the year. During the otF~er 2 quarters <br />of the year, the operator would test for free cyanide only. <br />Staff said the monitoring requirements also state that ...any <br />significant variation which could affect tailings operation or <br />stability will reported to the MLRD as soon as the data is obtained and <br />the operator would work with MLRD to obtain approval for any required <br />modification to the approved plan." Staff said the Division feels this <br />requirement also refers to elevated cyanide levels. <br />Staff said the Division obtained samples from the effluent, the tails <br />slurry after going through the treatment system, and from the lower or <br />west tailings pond and the collection pond; the operator took the same <br />samples simultaneously. The operator's samples were analyzed at their <br />in-house lab, and the Division's samples were analyzed ~y the Health <br />Department. <br />Staff referenced information contained in Exhibit A and discussed the <br />analysis which indicated that the concentration o' weak acid <br />dissociable cyanide was 180, the free or direct cyanide was at a level <br />of 240 and the total cyanide was 260 parts per million. The analysis <br />of the water taken from the tailings pond showed weak acic dissociable <br />cyanide at a level of 140, free cyanide 130 and total cyanide of 120 <br />parts per million; analysis of water taken from the collection pond <br />showed weak acid dissociable cyanide at a level of 80, f,ee cyanide at <br />90 and total cyanide at a level of 110 parts per million. <br />
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