2021-06-14_REVISION - M2012032 ‎(2)‎

• Permit No: M2012032
• IBM Index Class Name: REVISION
• Doc Date: 6/14/2021
• Doc Name: Adequacy Review Response
• From: Ouray Silver Mines, Inc.
• To: DRMS
• Email Name: LJW
• Media Type: D
• Archive: No

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27. It is understood that the double walled piping will be an additional redundancy
that will be field fit and is not included in the engineered drawings, and that the
as built certifications will include more details of the double walled construction
of the piping. However, the information provided thus far is too vague to be fully
evaluated. Please provide a narrative discussing the general construction
materials that will be used, field fit methods and areas along the length of the
delivery lines that will be double walled. This information can be updated and
modified in the as built certifications,but general plans should be addressed prior
to construction.
Response: The only area that double-walled piping will be used is in the new
compressor room adjacent to the reagent room. The compressor room does have
containment, but the mine would like additional protection in the area to help prevent
material release from the pipe in the compressor room. Pipe materials are described in
the table on drawing 700-MP-207 and 700-MP-208. The cable tray layout through this
area along with the pipe diameters are shown on drawing 700-MP-204 section 3. The
pipes in the cable tray will be double walled for 25 ft trough the compressor room.
28. Quality Assurance and Quality Control - Rule 6.4.21(16)
a. Contractors Quality Control Program Manual provided by Western
Refractory Construction, Inc,
i. This document is dated January 3, 2012. Please provide a more
recent version of the piping and components manual, as well as
identify who theQC administrator will be.
ii. Commit to providing all QA/QC documentation including change
orders or alteration documentation for each respective phase of
construction as it iscompleted.These should be provided in addition
to the as built drawings and certifications for the components it
applies to.
iii. The QA/QC measures described in the manual are extremely
generic, please explain how these measures will be specifically
applied and implemented to the construction of the Reagent Room.
iv. What percentage of welds will receive the NDE testing described
in the manual?
V. The QA/QC manual does not address additional or increased testing
as the result of a failed NDE test. If a welder fails, what is the
increased testing percentage for that welder?
vi. At what point in construction will hydro-testing be implemented?
Describethe details and evaluation for success criteria.
vii. The testing procedures described relate specifically to metal piping.
What method(s) will be employed to PVC piping to ensure
connections?
viii. The document includes an inspection and maintenance form from
Hess Corporation indicating that a "Pig Launcher" system will be
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