1984-11-30_INSPECTION - M1983052

• Permit No: M1983052
• IBM Index Class Name: Inspection
• Doc Date: 11/30/1984
• Doc Name: NOTICE OF INSPECTION AND INSPECTION REPORT
• From: MLRD
• To: MARATHON GOLD
• Media Type: D
• Archive: No

INSPECTION REPORT - PAGE '2
FILE I'i0. 83-52
DATE : November 30, 1934
OBSERVATIONS OF IMPORTANCE :
1 . The operator is permitted to disturb only 11 acres as per a revision which
decreased financial warranty. The operator has disturbed acreage which exceeds the
10 acres permitted for the pilot plant and the one ( 1 ) acre of mining.
2. The operator has set up a pilot cyanide extraction plant on site. This is not
permitted under their existing permit. The operator had submitted a technical
revision for a cyandide extraction process which the Division believed should be
submitted as an amendment. The operator was informed in a letter from the Division
that the proposed plan should not be implemented until approved by Colorado Mined
Land Reclamation Board. The operator stated the cyanide processed sample tailings
were disposed of in the tailings pond. The pond is located in a small spring fed
drainage below the pilot plant. Water samples were take by Colorado Mined Land
Reclamation Division and field tested as follows:
Sample No: MLPSI - below lowest dam - H2O flowing clear - unfiltered
Time Sampled: 1225 Date Sampled: November 30, 1984
Readings:
Time Date 2H E C (umphos/cm) IJoL
1330 11/30/84 7.5 650 3
1930 11/30/84 6.90 725 6.2
The operator was instructed to take water quality samples above the site, in the
tailings ponds, and below the site. Samples should be taken stored and shipped
according to EPA protocol . The following parameters should be analyzed:
pH (field & lab) TDS (lab)
EC (field) CN total free ( lab)
Temp oC (field & lab)
Results should be submitted as soon as possible to the Division.
The cyanide process is well designed .and is enclosed in the lab building. The
operator stated that no further cyanide processed materials will be disposed of in
the tailings pond. Cyanide processed material will be kept in barrels until a
disposal process .i.s .approved by Colorado Mined Land Reclamation Board. Cyanide
warning signs .were posted and a HCN monitoring device was on site. All cyanide was
contained in barrels and adequately stored in the pilot plant.
11
3. Topsoil stock piles were not reseeded and stabilized. Topsoil signs were
posted. Salvaging and stabilization of topsoil and locating stockpiles in the
permitted area is required.
4. An unpermitted waste rock (gravity mill processed placer sand and gravel ) pile
of approximately 50,000 yd3 is on site. The original permit stated that the pits
would be backfilled. Reclamation of the waste rock pile and pits were discussed.
It is apparent that the mine plan is not in accordance with the original permit.