My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2012-10-05_REVISION - M1977342 (12)
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M1977342
>
2012-10-05_REVISION - M1977342 (12)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 5:09:14 PM
Creation date
10/9/2012 10:58:36 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977342
IBM Index Class Name
REVISION
Doc Date
10/5/2012
Doc Name
Submittal- EPP, Cover to Material Safety Data- CYTEC
From
Climax Molybdenum Co.
To
DRMS
Type & Sequence
TR18
Media Type
D
Archive
No
Jump to thumbnail
< previous set
next set >
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
203
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
TR -18 to Permit M- 1977 -342 <br />Environmental Protection Plan <br />chemicals, and the material would be transported off -site in the same manner that it was received <br />at the site. As an alternative, the materials, such as (but not limited to) pine oil would be stored <br />on site until operations resumed. <br />If any unmixed chemicals were contaminated or the manufacturers were to decline possession, <br />then detoxification, stabilization or shipment offsite would be performed in compliance with <br />federal, state, and local regulations using a licensed and experienced professional contractor and <br />transporter to remove the chemicals from the site. <br />6.1.1.2. Final Closure <br />Mine: No Designated Chemicals used in processing. <br />Mill: Upon final closure at the conclusion of Mill operations, removal and disposal would be <br />performed as discussed above for Mill site chemicals during periods of Temporary Cessation. <br />6.1.2. Acid - Forming Materials and Acid Mine Drainage <br />Mine - The Henderson ore body contains unoxidized sulfides that, in the presence of oxygen, <br />water and bacteria, have the potential to become an acid - forming material as defined in Rule 1, <br />Section 1.1 (1). Henderson concurred with this fact when it accepted the DRMS determination <br />that the Henderson Mine was a DMO under the amended rules. In addition, water which <br />accumulates in the mine contacts this sulfide bearing material and, in turn, has the potential to <br />become acidified, thus, meeting the definition of "Acid Mine Drainage" in Rule 1, Section 1.1 <br />(2). <br />The structures and facilities at the mine site are constructed on a fill base of barren (waste rock) <br />extracted during construction and development of the underground mine and its associated <br />access and ventilation shafts (see Figure 1). Samples of the material from the No. 5 shaft were <br />characterized, and the results were presented to DRMS in a TR -04 related document dated May <br />15, 1996. The results of those analyses indicate that the material is non -acid forming. <br />Henderson has nevertheless managed this area as though it could potentially be acid - forming and <br />has adequate controls in place to detect acid forming conditions and /or elevated concentrations <br />of key parameters through routine surface and groundwater monitoring (see sections 8, 9, 10, and <br />11 below). In stream monitoring data on file with the Division comparing metal concentrations <br />above and below the Henderson Mine provide demonstration that, after 40 years, the fill <br />materials used to construct benches and facility support at the Mine is not generating ARD that <br />impacts water quality. <br />Impacted underground water at the Mine is diverted, conveyed to, and treated at the URAD <br />Waste Water Treatment Plant (WWTP). <br />Mill - The tailings delivery line gravity transports slurry, a mixture of tailings material and <br />process waste water consisting of approximately 40 percent solids, to the tailings storage facility. <br />Tailings material deposited into the tailings storage facility has the potential to be acid - forming <br />(see Figure 6). Adequate controls and protection facilities are in place related to these systems <br />and are discussed in detail in Section 7.2 below. <br />6.1.2.1. Temporary Cessation <br />Mine - During temporary cessation, mine water will continue to be conveyed to the URAD <br />WWTP for treatment. <br />Climax Molybdenum Company <br />Henderson Operations <br />October, 2012 <br />Page 13 of 40 <br />
The URL can be used to link to this page
Your browser does not support the video tag.