B08_Solicitation_Attach_1_SOW.pdf

Scope of Work

ROCKY MOUNTAIN NATIONAL PARK

Replace Granulated Activated Carbon Filter Media

Specifications for the periodic replacement of Granulated Activated Carbon (GAC) filter media at

Rocky Mountain National Park (RMNP).

GENERAL DESCRIPTION: Work shall consist of furnishing all labor, materials, tools, supplies, equipment, transportation, and supervision necessary to perform granulated activated carbon filter media exchange service at the Headquarters East (HQ East) water treatment plant (PWSID

#CO0135685). Project will include removal and off-site disposal of spent activated carbon and refill of filter vessels with fresh granular activated carbon media. All work and supplies shall meet or exceed all Federal and State requirements for public drinking water facilities.

GAC shall be Calgon Carbon Filtrasorb 400 granulated activated carbon or approved equal.

Filtrasorb 400 data sheet is included in the appendixes to assist bidders in verifying equivalent products.

GAC material must have been developed specifically for use in potable water filtration 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.

GENERAL REQUIREMENTS: GAC material is for two (2) 63” diameter filter vessels, each with a media bed depth of 42” and a capacity of 75 cubic feet or approximately 2,500 lbs of filter material. Total GAC material per preplacement is approximately 5,000 lbs.

The project site is at the HQ East water treatment plant, Building # 999 also known as B-999, located approximately 6.5 miles west of the Estes Park Visitor Center, inside the park and

Moraine Park Campground entrance gates. The tanks are located inside the building through a set of double doors with a 6’ opening. See appendixes for maps and drawings. The plant has typical vehicular access to the area in front of the building. The doors to B-999 are roughly 15’ from the campground road edge with a steep incline. Large engineering equipment and/or long trailers may not be able to access the immediate area in front of the water plant doors.

See appendixes for maps and drawings showing location and details in addition to this link to a pin of the water plant.

The Contractor is to adhere to all park rules and regulations, including keeping a clean work site, obeying traffic signs, speed limits, following food storage requirements, etc.

This project occurs in an iconic and heavily visited National Park where weather may be a factor and wildlife and visitors will be present in the park. The Moraine Park campground will likely be open during the performance of work.

The Contractor may not stage and/or drive off paved or unpaved roads: staging options exist in https://maps.app.goo.gl/hSfd8SJ48T6JSMzV6 https://maps.app.goo.gl/hSfd8SJ48T6JSMzV6 the area outside and adjacent to the HQ East water treatment plant and will be approved by the Contracting Officer (CO) or designee prior to utilizing.

The Contractor shall be responsible for proper handling, transportation and off-site disposal of spent filter media and all other debris, refuse and trash generated.

The Contractor will have access to potable water and standard electrical service (110v) at the Water Treatment Plant (B-999) for use only in the performance of this work.

Campground restroom facilities may or may not be open for Contractor use depending on the time of year.

Internet access, wifi and cellular connectivity is limited inside the park boundary.

The Contractor shall immediately report all accidents, incidents and mis-haps to the Contracting Officer or their designee.

Work shall be performed Monday through Friday between the hours of 7:00 AM and 5:30 PM, excluding federal holidays, unless alternate hours are approved, in advance and in writing, by the CO or designee.

SPECIFIC REQUIREMENTS: The contractor shall remove all old filter media and refill the filter vessels with new media. Due to limited space around and above the tanks, powered equipment like forklifts are not authorized for use. Several options exist including removal and replacement of GAC material by hand, at another park location with similar requirements, a preferred method of removing and refilling the GAC into the filter vessel(s) is to blow it in from an exterior pump where contractor provided equipment can be used to fill the pump. It may be possible to use a combination of hand work, air blower and vacuum truck to remove and replace the material, among other options. There is no Government Furnished Equipment available for contractor use in the performance of this contract.

The GAC filtration System will be offline during the performance of this work so the contractor will have uninterrupted access to the filter vessels. The filter system will be prepared and drained by Park staff prior to the Contractor performing work and at a schedule that is mutually agreeable to both parties.

This is a new filter process for the Headquarters East water system and the volume and frequency of filter media changes is based on design estimates and projections. Annual production for the system averages around 8.2 million gallons. Filter media has a shelf and service life, depending on several variables, before needing to be replaced. This contract assumes the plant will require 2 filter media changes in a 12-month period between October 1, 2025, and September 30, 2026. Each filter vessel contains approximately 75 cubic feet or

2,500 pounds of material. Total GAC material needed for each replacement event is 5,000 lbs or 10,000 lbs total.

The CO or designated Representative will notify the Contractor with as much lead time as possible, but no less than 14 days before the filter media is to be replaced. This is to allow adequate time to coordinate logistics, labor, materials, supplies, etc. with Park staff and plant operators.

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

• First aid and CPR Certification

• Locations of medical facilities

• If and as required, 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 responsibilities.

PERIOD OF PERFORMANCE: The period of performance of this contract starts October 1, 2025 and ends on September 30, 2026.

INSPECTION AND ACCEPTANCE: Prior to final acceptance and payment, the CO or designee shall inspect the Contractor’s work for compliance with the Scope of Work.

Figure 1: Map of front range showing RMNP and approximate project location under red x.

Figure 2: Location of HQ East water plant relative to the Estes Park Visitor Center.

RMNP HQ East Water Plant location from Estes Park Visitor Center

Figure 3: MPCG detail showing campground entrance and location of water plant in red circle.

Moraine Park Campground (MPCG) Ranger & Entrance Station

Fern Lake Road

HQ East Water Plant

Figure 4 – Water Treatment Plant technical drawings

GAC Media filters

Water Treatment Plant Entrance

Figure 5 – Section view of GAC Media Filters

Data Sheet

Safety Message

Wet activated carbon can deplete oxygen from air in enclosed spaces. If use in an enclosed space is required, procedures for work in an oxygen deficient environment should be followed.

FILTRASORB® 400

Granular Activated Carbon

FILTRASORB 400 activated carbon can be used in a variety of liquid phase applications for the removal of dissolved organic compounds. FILTRASORB 400 has been successfully applied for over 40 years in applications such as drinking and process water purification, wastewater treatment, and food, pharmaceutical, and industrial purification.

Description FILTRASORB 400 is a granular activated carbon for the removal of dissolved organic compounds from water and wastewater as well as industrial and food processing streams. These contaminants include taste and odor compounds, organic color, total organic carbon (TOC), industrial organic compounds such as TCE and PCE, and PFAS.

This activated carbon is made from select grades of bituminous coal through a process known as reagglomeration to produce a high activity, durable, granular product capable of withstanding the abrasion associated with repeated backwashing, hydraulic transport, and reactivation for reuse. The raw coal is mined and subsequently manufactured into GAC in the United States to ensure the highest quality and consistency in the finished product.

Activation is carefully controlled to produce a significant volume of both low and high energy pores for effective adsorption of a broad range of high and low molecular weight organic contaminants.

FILTRASORB 400 is formulated to comply with all the applicable provisions of the AWWA Standard for Granular Activated Carbon (B604) and Food Chemicals Codex. This product may also be certified to the requirements of NSF/ANSI 61 for use in municipal water treatment facilities. Only products bearing the NSF Mark are certified to the NSF/ANSI 61 - Drinking Water System Components

- Health Effects standard. Certified Products will bear the NSF Mark on packaging or documentation shipped with the product.

Applications Features / Benefits

• Produced in the United States from a pulverized blend of high quality, domestically mined bituminous coals resulting in a consistent, high quality product.

• Carbon granules are uniformly activated through the whole granule, not just the outside, resulting in excellent adsorption properties and constant adsorption kinetics.

• The reagglomerated structure ensures proper wetting while also eliminating floating material.

• High mechanical strength relative to other raw materials, thereby reducing the generation of fines during backwashing and hydraulic transport.

• Carbon bed segregation is retained after repeated backwashing, ensuring the adsorption profile remains unchanged and therefore maximizing the bed life.

• Reagglomerated with a high abrasion resistance, which provides excellent reactivation performance.

• High density carbon resulting in a greater adsorption capacity per unit volume.

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© Copyright 2019 Calgon Carbon Corporation, All Rights Reserved

DS-FILTRA40019-EIN-E1

Specifications1 FILTRASORB 400

Iodine Number, mg/g 1000 (min)

Moisture by Weight 2% (max)

Effective Size 0.55–0.75 mm

Uniformity Coefficient 1.9 (max)

Abrasion Number 75 (min)

Screen Size by Weight, US Sieve Series

On 12 mesh 5% (max)

Through 40 mesh 4% (max) 1Calgon Carbon test method

Typical Properties* FILTRASORB 400

Apparent Density (tamped) 0.54 g/cc

Water Extractables <1%

Non-Wettable <1%

*For general information only, not to be used as purchase specifications.

Industrial Wastewater

Pond/Aquarium/ Swim

Groundwater Surface Water

Bottle & Brewing

Environmental WaterPharmaceuticals Food &

Beverage

Water Processing

Drinking Water Industrial

Drinking Water (Potable)

Granular Activated Carbon Municipal

Water Reuse

Reactivation

GAC Media

Safety Message

Wet activated carbon can deplete oxygen from air in enclosed spaces. If use in an enclosed space is required, procedures for work in an oxygen deficient environment should be followed.

1.800.4CARBON calgoncarbon.com

© Copyright 2019 Calgon Carbon Corporation, All Rights Reserved

DS-FILTRA40019-EIN-E1

Design Considerations

FILTRASORB 400 activated carbon is typically applied in down-flow packed-bed operations using either pressure or gravity systems.

Design considerations for a treatment system is based on the user’s operating conditions, the treatment objectives desired, and the chemical nature of the compound(s) being adsorbed.

Typical Pressure Drop Based on a backwashed and segregated bed

Typical Bed Expansion During Backwash Based on a backwashed and segregated bed

24C/75ºF2C/35ºF 13C/55ºF

24C/75ºF

2C/35ºF

13C/55ºF

Superficial Velocity (gpm/ft2)

Conditioning and Backwashing Backwashing and conditioning fresh GAC before placing into operation is critical to GAC performance. The reasons for backwashing before placing fresh media online are to: (1) size segregate the media so subsequent backwashing will return the media to the same relative position in the bed, (2) remove any remaining air from the bed, and (3) remove media fines which can lead to excessive pressure drop and flow restriction. In addition, proper backwashing is a crucial step to collecting the most representative and meaningful post-start up data on compounds of interest, such as metals listed in the NSF/ANSI 61 standard.

Below are the recommended steps for proper conditioning and backwashing of GAC based on Filtrasorb 400 GAC being backwashed at 55°F:

1. Fully submerge GAC bed in clean, contaminant free water for at least 16 hours (overnight)

2. Open backwash inlet and begin up-flow at 3 gpm/ft2 for 2 minutes

*Duration representative of initial backwash conditions. Required duration during operational backwashes can be shorter but will vary by utility, solids load, and GAC throughput. Contact Calgon Carbon for more information”

40% BED EXPANSION

AT 8.5 GPM/FT² WITH

55° WATER

0.5 PSI OF

PRESSURE DROP

AT 4.16 GPM/FT²