Opening of Bids - Granular Activated Carbon Re-Activation & Virgin Replacement - Carbon Activated Corporation

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Carbon Reactivation Services 2. BULK DELIVERY GAC SERVICE Carbon Activated Corporation operates its own fleet of pneumatic trucks for the delivery and transfer of carbons from pressure and open gravity filters. The trailers are compartmentalized, allowing batches of 20,000 lbs of new or reactivated carbon to be loaded in to the trailers, using only 2 of the 4 compartments. (i.e. 10,000 lbs per compartment) The carbon is transported to site where the first operation is to transfer the 20,000 lbs of spent carbon from the Model 10 filter in to the trailer using the 2 spare empty compartments located at each end of the trailer. To transfer the spent carbon from the filter in to the trailer, flexible 4 inch pipes are run from the trailer "inlet' valve to the spent carbon "outlet' valve on the filter unit. The spent carbon filter is filled with water and pressurized with air to 8 — 14 psi. The filter outlet and trailer inlet valves are opened and the spent carbon slurry flows from the filter in to the 2 spare empty compartments in the trailer. When the filter is empty the valves are closed and the connection pipes are disconnected. For open type filters, the spent carbon is transferred from the filter using an educator and motive water from a hydrant. The suction wand from the educator is placed in the spent GAC bed and the carbon slurry is hydraulically transferred into the empty compartments of the trailer. The spent carbon in the trailer is drained of all free water prior to transporting it back to the reactivation facility. The 20,000 lbs of reactivated/virgin carbon in the trailer is then transferred in to the now empty filter. This is achieved by filling the central compartments containing reactivated or virgin carbon in the trailer, with water. 4 inch flexible pipes are run from the trailer "outlet' valve to the filter "carbon inlet' valve. All trailer valves and top manhole covers are closed and the hailer is pressurized with air to 14 psi. Once pressurized, the trailer central compartment outlet valves and the filter "carbon inlet' valve are opened and the carbon in transferred by air pressure in to the filter. Additional water may be added to the trailer central compartment to ensure all carbon has been transferred. The transfer operation takes 2 — 3 hours.