2006-05-15_PERMIT FILE - C1982056A

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 5/15/2006
• Section_Exhibit Name: Exhibit 49G Electro-Coagulation Design Drawings & Contractor Specifications
• Media Type: D
• Archive: Yes

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TWENTYMILE COAL COMPANY
• 2, Electro-coagulation Container Installation
2.1. The electro-coagulation equipment is housed in a 40' x 8' shipping container. The
container will be set with the door end facing west. The end of the container will be set on the
poured building foundation extending into the building approximately 1 foot. The other portion
of the container extending outside of the building will be set on 4 poured concrete piers. The
siding and interior liner of the building will be fitted and flashed to the container on the walls
and roof.
3. Feed and Discharge Pipe lines
3.1. The existing plumbing that is located in the covered culvert outside of the caustic soda
building will be relocated in the building. The contractor shall supply the necessary pipe and
fittings to install these lines. The contractor will be responsible for excavating and proper
bedding and backfilling of all pipes as per the manufactures installation instructions. The lines
are approximately 50' in length each.
3.1.1. Deep well discharge line-This will be the feed water into the building. It will be tied into
existing line that comes from the North and South deep well pumps. It will stub into the
building on the West wall. The pipe will have a clearance of 18" from the wall to facilitate
plumbing connections.
3.1.2. Finished product line- This line will come out of the 5000 gallon tank and will exit the
building on the South wall and will discharge into the #1 settling pond. This line can run
above ground as long as it is sloped downward to prevent freezing.
• 3.1.3. Excess flow reject line- This line will also exit the building on the South wall and will be
tied into the existing reject line that runs to the old mine vent shaft.
4. Control valves and flow meter plumbing
4.1.The following plumbing in the building will be 6" schedule 40 welded steel pipe with ANSI 150
Ib flanges and valves. The plumbing will be installed as per the supplied schematic although
locations of components can be adjusted as necessary. All piping will be adequately
supported and anchored
4.1.1. Electro-coagulation feed line. The deep well feed pump will be connected to the
storage tank.
4.1.1.1. A motorized valve will be supplied and installed in this line. The valve shall be
120 volt AC motor with a 4-20 Ma position input as well as a 4-20 Ma valve position
indicator feedback. The motorized valve circuit will be plumbed with a bypass line
and fitted with isolation valves on both sides of the motorized valve.
4.1.1.2. A McCrometer 6"flow meter will be installed in the line downstream of the
bypass. It will need to be placed the appropriate distance from elbows and valves as
per the manufactures instructions. The flow meter is supplied with grooved ends.
TCC will supply the flow meter.
4.1.1.3. The line will be then be plumbed to the storage tank with the appropriate
connections.
4.1.2. Excess flow reject line.

29515 Routt County Road N 27, Oak Creek, Colorado 80467, Phone [phone] Fax [phone]