1992-04-21_REVISION - M1988112

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 4/21/1992
• Doc Name: MONITORING BATTLE MTN GOLD SAN LUIS PROJECT FN M-88-112
• From: MLRD
• To: MICHAEL LONG
• Type & Sequence: AM1
• Media Type: D
• Archive: No

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T. P
STA'I'~OF COLORADO
MINED LAND RECLAMATION DIVISION
Department of Natural Resources
1313 Sherman St., Roam 215
Denver. CO 80203
303 866-3567
FA x: 303 6328706
DATE: April 21, 1992
T0: Michael Long
FROM: Larry Oehler ~~•
RE: Monitoring - Battle Mountain Gold (BMG), San Luis Project,
File No. M-88-112
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Roy Homer.
Gwemor
Michael B. Long.
Division Director
I have researched the San Luis Project file thoroughly to determine BMG's
monitoring requirements and history of reporting results to the Division.
Because the present Notice of Possible Violation is related to mill and
tailings facility operations, I limited the search to monitoring anj reporting
required since start up of the mill which was in January of 1991.
On December 20, 1990, Battle Mountain Gold submitted to the Division a request
for a technical revision to revise the monitoring schedule and moni:oring
parameters. The review process for that technical revision was not completed
by the Division and it became a revision to the permit automatically on
January 20, 1990. I have attached copies of the approved permit anti technical
revision schedules and parameters. The technical revision changed l:he surface
and ground water sampling schedule from monthly (May-June) and quarterly
(October, January, April and July) to a quarterly schedule. New analytical
parameters were added to two quarterly monitoring periods. The revised
sampling during the remaining two quarters includes a reduced suite of
parameters which eliminated sampling in these quarters for total cyanide.
A document titled Monitoring Requirement Summary submitted to the Division
January 22, 1990 states that "chemical analysis of the collection pond seepage
on a quarterly basis for the parameters identified in Table G 1-2 of the
approved permit will be performed. In addition, the leak detection system of
the collection pond will be monitored for any water weekly during initial six
month start-up and monthly thereafter." There is no commitment to report
this data to the Division. Also, this document states that "data collected as
part of the tailings monitoring program will be compiled into an annul report
for submittal to the MLRD."
Battle Mountain Gold stated in their permit and adequacy responses that they
would also monitor settlement of the tailings embankment free water pool
volumes, deposited tailings densities, and the quantity and quality of
solution draining to the collection pond from the tailings disposal facility.
However, I did not find a commitment by BMG to submit these monitoring results
to the Division.