1992-06-24_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 6/24/1992
• Doc Name: DRAFT SUBJECT TO BOARD APPROVAL
• Type & Sequence: AM1
• Media Type: D
• Archive: No

.~~..
Di~AFT
Minutes, June 24-25, ~2 su . J 4
blest To Board Approval
been reduced to the permitted levels--on May 26, 1992, the operator
submitted monitoring results indicating a reduction in cyanide levels
from 184-186 parts per million (ppm) to 32-34 ppm, and an application
for a technical revision (TF:-007) for the use of Hydrogen Peroxide as
an additional method of treating the tailings. With the Division's
approval of the TR, the operator will be required to cease the use of
Hydrogen Peroxide by October 15, 1992. The operator submitted TR-O10
for the use of the INCO process for further tailings treatment; if
approved, this will be operational in October of 1992.
Abatement requirement 5) leak detection system effluent containment
plan--the operator committed to repairing the primary liner if a leak
is detected, however, no leak has been detected to date, 6) cyanide
detection, interception, containment remedial treatment--submitted as
technical revisions which ensure that ground water monitoring
facilities in place are adequate, 7) modification of the ore processing
methodology--a commitment has been made in writing, 8) modification of
the tailings area reclamation plan--commitment in writing-this will
occur 180 days after cyanide detoxification is completed, 9)
modification of tailings area environmental monitoring plan--commitment
made in writing and is ongoing, 10) necessary financial
assurance--commitment in writing, 11) critical path management
schedule--will be provided per• a commitment in writing and 12)
modification of the water quality monitor sampling and analysis
protocol--the operator submitted TR-006 and the Division issued
adequacy comments including 'the comments made by the citizens. The
protocol should be finalized next week.
Staff said the parties had submitted names and qualifications of
Companies as nominations for third-party sampling and analysis, as
requested by the Board, for the completion of a protocol. In response
to a question from the Board, Staff said the issue remaining of most
concern to the Division relates to the development of the protocol.
Mr. Dean Massey, an attorney representing the operator, presented
EXHIBIT B, an outline of the operator's status report to the Board. He
provided some background information and discussed the abatement
actions conducted by the operator.
Mr. Andre Duchane, representing the operator, discussed the
detoxification processes used and/or proposed for use (INCO) by the
operator. He said the INCO technology has been purchased, and the
operator plans to have the system operational by mid-October. The
Board discussed a concern from the citizens of the area about ground
water with Mr. Duchane, and he said a minimum of two additional wells
will be installed to monitor ground water. Staff said the Division is
in the process of reviewing t:he TRs related to the installation of
ground water monitoring wells.
At the request of the Board, Mr. Duchane, Mr. Massey and Staff
discussed the issue of cyanide levels remaining over the permitted
levels past June 24, 1992.