140P1223Q0118_Attachment_1_Statement_of_Work_SOW.pdf

SECTION 1

Statement of Work 140P1223Q0118 Inspect and Clean Drinking Water Storage Tanks ROMO

1.1 DESCRIPTION

A. Pursuant to regulations contained in Colorado Primary Drinking Water Regulations, 5 CCR

1002-11, section 11.28 of Regulation 11, drinking water storage tanks need to be periodically inspected and cleaned to identify any structural or equipment deterioration and to remove the normal buildup of sediment and biofilm. These regulations are enforced by the Colorado

Department of Public Health and Environment (CDPHE) and are also referred to as

‘Regulation 11’ or the ‘Storage Tank Rule.’

B. The scope of work for this project consists of the inspection and cleaning of certain drinking water storage tanks at water systems within the park as detailed in Table 1 and Table 2 at the end of this section. The scope for inspections includes all labor, materials and equipment for the inspection and video recording of the condition of the complete interior area of the water tanks and provide video recording and inspection reports as specified. The scope for cleaning includes all labor, materials and equipment to clean up to two (2) inches of sediment and bio-film from the water tank floors including capturing the sediment and material in bag filters as well as disposal. Two of the seven tanks are associated with seasonal systems. Inspections and cleaning of these tanks may be scheduled after their dates of active use; however, all tank inspections and cleaning shall be accomplished with no disruption to service and in coordination with the Park’s Operator of Responsible Charge (ORC).

C. The contractor shall provide a written inspection and cleaning report as well as video recording of the condition of the tanks before and after the cleaning. The inspection shall satisfy the CDPHE requirements of the Comprehensive Inspection Checklist per Section

11.28 of the Storage Tank Rule as contained in Regulation 11 (5 CCR 1002-11). The post-cleaning video shall highlight areas identified as requiring repair work with the report detailing observations and recommendations.

D. The Contractor shall provide all materials and labor required to perform the work specified.

E. The contractor shall hold all required commercial diving certifications and insurance.

1.2 LOCATION

All job sites are located within Rocky Mountain National Park. Generally, all locations are accessible by pickup truck and trailer with the exception of the Fall River Pass 20k tank and the Hidden Valley tank. See Table 1 at the end of this section and Overall Project and Site Detail Maps.

Locations in this project include:

• McGraw Ranch, Larimer County, CO;

• Hidden Valley, Larimer County, CO;

• Headquarters Utility Area, Larimer County, CO;

• Fall River Pass / Alpine Visitor Center, Larimer County CO

1.3 PERFORMANCE PERIOD:

A. Work shall not commence before approved by the Contracting Officer (CO) and expected to be between August 1rst, 2023 and November 1rst, 2023. The total performance period is

90 calendar days. 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 writing and in advance by the CO and/or Contracting Officer Representative (COR).

1.4 FIELD CORDINATION:

A. The Contractor shall ensure no disruptions of Utility Operations and water service at any location and shall coordinate all field work through the CO and/or designated COR, under the permission of the park ORC. The Contractor shall coordinate with the ORC at 970-586-

1241 or through the CO and/or COR.

1.5 MATERIALS AND EQUIPMENT

A. All materials and equipment shall be Contractor-furnished from outside the park.

1.6 PRICE PROPOSAL

A. The base proposal for tank cleaning and inspection shall include the removal of up to 2-inches average of sediment over the entire floor of the tank. The contractor shall provide their cost per inch for removal of sedimentation exceeding two inches. Since sediment is rarely distributed evenly over the entire floor area, the diver shall first measure and record the depth of sediment at enough locations to determine an average depth of sediment. Before cleaning begins the contractor and Contracting Officer, or their designee, shall agree upon the average depth of sediment in any tank that appears to have more than 2 inches of sediment to be cleaned.

TABLE 1:

Tank Name

Water System

PWSID:

System

Classification Type:

Public/Non- Public

Seasonal System & Dates

Tank Type:

Accessible by Trailer:

Mcgraw Ranch

Mcgraw Ranch

CO0235384 Non-Public Non-Public No below ground yes

Fall River Pass 60 K

Fall River Pass

CO0335266

Transient non-community

Public Yes

6-2-23 to 9-15-23 below ground yes

Fall River Pass 20 K

Fall River Pass

CO0335266

Transient non-community

Public Yes

6-2-23 to 9-15-23 below ground no

Hidden Valley

Hidden Valley

CO0335343

Transient non-community

Public No below ground no

HQ

East

150 K

RMNP

Headquarters

East CO0135685 Community Public No below ground yes

HQ

East

100 K

RMNP

Headquarters

East CO0135685 Community Public No below ground yes

B-tank

RMNP

Headquarters East

CO0135685 Community Public No below ground no

TABLE 2:

Tank Name

Year Built:

Tank Material:

Tank Lining:

Hatch Diamension in Inches

Tank Dia.

(in feet

Tank Length

(in feet)

Tank Width

(in feet)

Tank Height

(in feet)

Nominal Capacity (Gallons)

Overflow Level Ft (Gallons)

Operating Level Ft (Gallons)

Number of Cells

Bottom Surface

Area

SQFT

Mcgraw Ranch

2001 Concrete epoxy 36 x 30 38 12 12 40000 11.5

(39,200) 10.5

(35,800) 1 456

Fall River Pass 60 K

1965 Concrete unlined 24 x 24 48 20 8.5 71800 9.33

(66,000) 8.5

(60,000) 1 960

Fall River Pass 20 K

1938 Concrete epoxy 22.5 Dia 24 12 9.5 20,465 9.25

(19,900) 9.0

(19,400) 1 288

Hidden Valley

Fiberglass 35 12,000 1

HQ

East

150 K 1939 Concrete 22.5 Dia 60 8.4 150000

7.5 (154,900)

7.3 (151,400)

2 cells w/ columns at 10' on center

HQ

East

100 K 1970 Concrete 22.5 Dia 80.5 20 10 120000

8.5 (102,400)

8.25 (99,400)

1 1610

B-tank 1938 Concrete epoxy 21 Dia 20 10 8.5 12700 8.0

(12,000) 7.5

(11,200) 1 200

END OF SECTION 1

SECTION 2

CLEAN & INSPECT WATER STORAGE TANKS

1.1 GENERAL

A. The following regulatory requirements, standards and procedures shall apply. In the event of a conflict between any two requirements, standards or procedures, the more stringent shall apply.

a. Colorado Primary Drinking Water Regulations, 5 CCR 1002-11, section 11.28 of Regulation

11.

b. AWWA Standard for Disinfection of Water Storage Facilities, ANSI/AWWA C652-92 and

C652-02, American Water Works Association.

B. Underwater Operations:

1. All Dive Maintenance Technicians and associated in-tank equipment shall be fully disinfected in accordance with AWWA Standard C652-02 with 200+ ppm chlorine solution immediately prior to entering potable water.

2. All System entries shall be conducted in accordance with applicable OSHA regulations pertaining to Diving in Confined Space; including 1910.401 through 1910.441.

3. Specialty equipment may include but is not limited to: appropriate OSHA climbing and personal fall protection; AWWA and ADC approved commercial diving equipment dedicated to in-service potable water operations. All equipment shall be stored in a manner that prevents both chemical and bacteriological contamination. Specialty equipment includes but is not limited to the following:

a. External or surface supplied air source with hard hat (dry helmet).

b. Full time voice communication with surface personnel.

c. Full time video of all procedures with surface personnel.

d. Vulcanized rubber dry suit (in good repair) dedicated for use in potable water.

4. Dive team shall consist of a minimum of three persons. If two divers are submerged at the same time a minimum of a five-person dive team is required. All dive team members must have ANSI/ACDE 01-1993 minimum commercial diver training. This requires a certificate of graduation from an ACDE certified commercial diving school or equivalent military or other training (minimum 600 hr.). Divers must have experience in closed, confined spaces and using the underwater inspection equipment employed. All dive team members shall be free of communicable diseases and shall not have been under a physician’s care within the seven-day period prior to entering the facility.

5. Dive team must have OSHA approved Standards, Procedures, and Safe Practices Manual present and available for review at each dive location.

1.2 CLEANING PROCEDURES

A. The potable water tanks shall be in service during cleaning, and the cleaning process shall not create any visible turbidity in the water column.

B. Debris and other contamination shall be prevented from blowing or falling into the tank. Before the hatch is opened the immediate area will be cleaned of all loose dirt and debris. The working area in the immediate vicinity of the access hatch shall be covered with a protective plastic sheet (minimum

10’radius), which, once in place, will be washed with a 10% chlorine disinfectant solution.

C. Cleaning procedures shall combine vigorous brushing of surfaces cleaned, in addition to removing material from the reservoir by vacuum or water suction. Use of a stationary or fixed brush inside or outside the vacuum head for this purpose is inadequate and will not be allowed. In addition to cleaning all sediment or other material from the floor of the reservoir, the divers shall ensure that all sediment is removed from the floor and floor to wall seams, support column bases, plumbing fixtures and supports, man entries, or any other areas where the vacuum does not reach during normal floor cleaning.

D. Diving contractor shall clean the vertical wall surfaces with similar equipment and procedures as used in cleaning the floor and must be done in such a manner that does not create turbidity inside the reservoir.

E. All water discharged from reservoir during cleaning procedures shall be run through a bag filter to capture any sediment prior to release of water on the ground. Bag filters shall be 10-ounce, non-woven geosynthetic material capable of capturing sediment while allowing discharge water to pass through. Bag filters and sediment shall be removed from the park and disposed of at a certified landfill in accordance with all federal state and local regulations.

F. All water discharged during cleaning operations shall be de-chlorinated. De-chlorination chemicals and procedures must be authorized by the ORC prior to use. Maximum discharge rate during the cleaning operations shall be 200 gallons per minute. The Contractor shall make every effort to minimize the quantity of water discharged. Water may be discharged to the ground to a location within 200 feet of the tanks as approved by the Contracting Officer. Installation of sedimentation basins for the discharged water may be required at the Contracting Officer’s discretion. The sedimentation basins shall be constructed utilizing silt fence, hay bales, or other approved materials to prevent erosion or other deleterious effects to nearby ground or surface waters. All areas impacted by discharged waters shall be reported to the Contracting Officer.

1.3 INSPECTION

A. Inspections shall be performed according to National Association of Coatings Experts (NACE) and the

American Society for Nondestructive Testing (ASNT) standards, and shall be included as part of the cleaning process and cost. The inspection shall be accomplished as a continuous process by the diver and include a detailed final inspection. Contractor shall submit a comprehensive inspection checklist detailing all areas of inspection. The Government will approve the inspection list or amend the inspection list if necessary.

B. Diver shall have a video camera with adequate lighting capable of capturing video feed and displaying to the surface. The live video will be set up so that surface personnel can view underwater procedures as they are performed and so that procedures can be electronically recorded and transferred on media such as DVDs along with live voice narration. The video camera must have sufficient focal range to detect sanitary defects. Cameras with a limited short focal range are not acceptable. Hand held cameras and hand held video cameras, if used, shall meet these standards or used for still images.

1.4 INSPECTION REPORT

A. Inspection report shall include high resolution color video recordings on transferable media such as flash drives or DVDs with real time imprint and a time log indicating where each feature or problem area may be found.

a. VIDEOS: The videos should include a complete account of all activities. The DVDs shall be narrated live by the divers and/or other personnel. DVDs of the inspection shall also include the pre and post cleaning conditions of each feature of the tanks and any problem areas or features of the tank that may require repair.

b. SCHEMATIC DIAGRAMS AND UPDATED TABLE ONE: Submit a schematic diagram of each tank, and an updated Table 1 with field verified dimensions including for tank material, dimension/diameter, hatch opening and floor surface area.

c. Inspection and cleaning report shall include:

i. Tank type and construction materials

ii. Approximate volume in gallons

iii. Approximate dimensions

iv. Location

v. Number of inlets, outlets, overflows, hatches, and vents

vi. Coating systems (if known)

vii. Date put in service (if known)

viii. Rehabilitation and major maintenance history (if known)

d. REPORTS: Provide one hard copy of the electronic report with still color images of the fixtures and problem areas with reference to the time stamp on associated video coverage of the same area. The contractor shall provide the complete report, including schematic diagrams and updated table one, in a single Adobe PDF file, and a copy of all editable individual files in the original format/software that was used to make the report on transferable electronic media.

1.5.1 SUBMITTAL AND APPROVAL PROCEDURES

A. The Contractor shall submit a thorough safety plan and emergency response plan.

B. All submittals shall be transmitted to the Contracting Officer via email with cover letter.

C. All submittals shall be carefully reviewed by the Contractor prior to submission to the government to eliminate errors.

D. The Contractor shall forward submittals to the Contracting Officer prior to the Post Award Meeting.

E. The Contracting Officer will review and approve, or provide comment to submittals in as short a timeframe as possible but not to exceed 10 business days.

1.6 REFERENCED STANDARDS

AWWA Standard for Disinfection of Water Storage Facilities, ANSI/AWWA C652-92 and C652-02, American Water Works Association

AWWA Standard for Welded Steel Tanks for Water Storage, ANSI/AWWA D100-96, American Water

Works Association

AWWA Standard for Factory Coated Bolted Steel Tanks for Water Storage, ANSI/AWWA D103-97, American Water Works Association

The Colorado Primary Drinking Water Regulations, 5 CCR 1002-11, https://www.colorado.gov/pacific/cdphe/water-quality-control-commission-regulations

END OF SECTION 2