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2017-04-26_REVISION - M1977300
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2017-04-26_REVISION - M1977300
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Entry Properties
Last modified
12/21/2020 3:29:34 PM
Creation date
4/28/2017 5:01:07 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977300
IBM Index Class Name
Revision
Doc Date
4/26/2017
Doc Name
Request for Technical Revision
From
Cotter
To
DRMS
Type & Sequence
TR25
Email Name
MAC
WHE
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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Technical Revision 25 Schwartzwalder Mine <br /> 1 <br /> 3.1.3 Ion Exchange Columns <br /> Cotter will install three of the four IX columns from the OWTP into the NWTP. The fourth IX column <br /> will be stored on site, in reserve. These columns will be primarily plumbed to treat RO effluent prior to <br /> ' discharge. These columns are necessary to polish the RO effluent to allow Cotter to meet the uranium <br /> discharge standard specified in its Colorado Discharge Permit CO-0001244. <br /> ' 3.1.4 Reactor Tank <br /> ' During the alluvial material excavation project and decommissioning of RML#2, the current concrete <br /> containment will be demolished and placed into the Minnesota Adit. Currently, the concrete containment <br /> collects effluent from all the sumps and creek pumps. Once this structure is gone Cotter must install a <br /> ' new tank to collect sump and creek water. <br /> The current plan is to move an existing tank currently located in the OWTP to the mesa near the NWTP. <br /> ' This tank will serve as a reactor tank that collects sump and creek water into which flocculant and sodium <br /> hydroxide will be injected. The flocculant will precipitate solids, and the sodium hydroxide will raise the <br /> pH, both of which will allow cleaner water to enter the clarifier inside the NWTP. <br /> ' The reactor tank will be 9 feet in diameter and hold 7,000 gallons. It will be located outside the Steve <br /> Adit near the backfill slurry and molasses tanks. A lined secondary containment berm will be constructed <br /> ' that holds the total capacity of all three tanks in this location (Figure 3-2). <br /> 3.2 FACILITIES EVALUATION <br /> ' This section provides an evaluation of the expected effectiveness of new structures discussed in Section <br /> 3.1. Information presented in this section is required by Hard Rock, Metal, and Designated Mining <br /> Operations Rule 6.4.21(7). In many cases, the information required in this section is found in <br /> ' Schwartzwalder Mine, Environmental Protection Plan, Revision 1.0 (Revised EPP) (Whetstone 2016). <br /> Therefore, Cotter will not repeat that information here, but will cite the appropriate sections of the latest <br /> ' EPP. <br /> 3.2.1 Site-Specific Conditions <br /> ' Sections 1.0 and 2.0 of the Revised EPP present information regarding site-specific conditions <br /> (Whetstone, 2016). <br /> ' 3.2.2 Designated Chemicals <br /> ' The following information is from Section 6.0 of the Revised EPP (Whetstone, 2016). <br /> Rule 6.4.20(6) requires that this section of the EPP fully describe the procedures for the disposal, <br /> ' decommissioning, detoxification or stabilization for all designated chemicals and toxic or acid-forming <br /> materials. The EPP must describe measures to be taken to prevent any unauthorized release of pollutants <br /> to the environment and must include adequate reclamation and closure practices for such designated <br /> 1 Mine Permit M-1977-300 <br /> Cotter Corporation(N.S.L.) 13 April 2017 <br />
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