A04_0044010365_Scope_of_Work_-_Replace_GAC_Filter_Media_at_MEVE.pdf

Scope of Work

01/07/2025

Mesa Verde Na onal Park – Water Treatment Plant

Replace Granulated Ac vated Carbon

Carbon exchange services at Water Treatment Plant (Entrance to Mesa Verde Na onal Park, approximately 10 miles east of Cortez, Colorado just off Colorado State Hwy 160).

General Descrip on: Work shall consist of furnishing all labor, materials, tools, supplies, equipment, transporta on, and supervision necessary to perform ac vated carbon exchange service at the Mesa Verde Na onal Park water treatment plant. Project will include vacuum removal and off-site disposal of spent ac vated carbon, inspec on tanks interior, touch up of epoxy paint (tank interior walls) as necessary, and refill with fresh granular ac vated carbon media. All work and supplies shall meet or exceed all Federal and State requirements for public drinking water facili es.

Granular Ac vated Carbon (GAC) at Mesa Verde Na onal Park Water Treatment Plant must be

ACOL-L60 (12 x 40) acid washed bituminous coal base ac vated carbon or approved equal.

ACOL-L60 data sheet is a ached to this solicita on to assist bidders in verifying equal products.

Offered GAC must have been developed especially for the purifica on of potable water and be suitable for removal of dissolved organics, including compounds causing taste and odor problems and trihalomethanes (THMs). Product must meet all AWWA B604 standards for potable water and NSF/ANSI Standard 61.

Specific Requirements: The GAC filtra on System will be bypassed during the performance of this work so the contractor will have uninterrupted access to the tanks. The contractor will have access to the building during normal working hours, approximately 7am – 4pm Monday through

Friday excluding Holidays. Work outside of these hours is not authorized without prior arrangements with the water treatment plant operator and the contrac ng officer. The tanks will be bypassed and drained prior to the contractor arriving onsite at a schedule that is mutually agreeable to both par es.

The total quan ty of GAC to be replaced is approximately 14,000 pounds. (7,000 pounds per tank X 2 tanks = 14,000 lbs. or approximately 180 cubic feet.)

This is the 6th me the GAC has been replaced in this system. It has been online for approximately 15 years but is only operated approximately six months out of the year during peak visita on periods. We are requiring that this system be inspected during the exchange service to ensure and damage to the interior epoxy surface is iden fied and adequate repairs made prior to refilling the tanks. For bidding purposes, assume one gallon or less of paint and no more than two days’ me to include prepara on and proper curing of epoxy touch up paint.

A er inspec on, and touchup paint the contractor will be required to refill the system with fresh media. Due to limited space around and above the tanks, a forkli is not authorized for use in refilling the GAC. The preferred method for refilling the GAC into the tanks is to blow it in from an exterior pump where contractor provided equipment can be used to fill the pump.

There is no Government Furnished Equipment available for contractor use in the performance of this contract.

The contractor shall prepare, and submit at least 10 days in advance, an accident preven on plan that addresses the following items, at a minimum:

• First aid CPR Cer fica on

• Hospital Map

• Permit required confined space entrance requirements.

o Competent Person, o Permit Required Confined Space entry procedures, o Atmospheric monitoring procedures.

• Lock-out – Tag-out procedures, including roles and responsibili es.

There is also limited maneuverability at the exterior of the building making large tanker trucks imprac cal. See aerial photo showing access with vehicles for scale. The tanks are located just inside the building through a garage door as indicated by the arrow. A small truck can easily access the area.

The contractor shall be responsible for disposal of spent non-hazardous ac vated carbon.

Photos

Aerial overview of worksite showing location of water treatment plant near the junction of Colorado State Hwy 160 and main park road approximately 10 miles east of Cortez, Colorado.

Aerial view of Mesa Verde Water Treatment Plant showing truck access and location of doors leading to carbon filtration tanks.

Photo of turn at driveway access to filtration system access doors.

Photo of driveway leading to filtration system access doors.

Photo from rear of driveway showing access door and driveway.

Photo showing proximity of filtration tanks to the doors.