QA V2 - FY26WTRTNKKT - Water Tank Survey.pdf

Questions and Answers

FY26WTRTNKKT – Water Tank Survey Closed 6 April 2026 1000hrs

1. Are all tanks required to be drained prior to cleaning and inspection?

No, they do not need to be drained.

2. Is the scope based on confined space entry, or is diver or ROV inspection expected; can tanks be taken offline one at a time for staged works?

Every water storage tank can be isolated; however, Tanks 1721, 561, and 10113 must to stay online due to the layout of the system.

Please refer to the tank priority table below.

TANK

LOCATION/

NAME

SHAPE CAPACITY

GALLONS

OVERALL

HEIGHT

(FT)

HEIGHT

TO

BOTTOM

OF

BOWL

BOWL

DIAMETER

(FT)

BOLTED

OR

WELDED

STEEL

POWER

110, 220, OR

NONE

WATER

AVAIL.

WITH

TANK

DRAINED

EST DATE

OF LAST

INSPECTION

Status

6 - Tower 561 SPHERE 500,000 132 95 50 Bolted None Yes 6/28/2015 Online 7 - Tower

SPHERE 300,000 150 116 45 Bolted 220 Yes 6/28/2015 Online

2 - Tower 10420

SPHERE

100,000 141 113 28 Welded

None Yes

6/28/2015 Offline

8 - Underground Tank 10113

Cylinder

300,000

N/A

Concrete

Yes

Unknown

Online

5 - Ground Tank 1999

3,000,000

Bolted

Unknown

Online

3 - Ground Tank 562

200,000

Welded

6/28/2015

Online (Not use daily

4 - Ground Tank

2,300,000

Online (Not use daily

1 - Ground Tank

500,000

Offline

3. Access details for each tank and any restrictions on entry or working at height; whether scaffolding or internal access is to be provided or included in our scope?

Accessing the tank isn’t a problem, but you may need a ladder or step stool to reach the hatches. Please note that the government will not supply any additional equipment for entering the tank.

4. Where sludge, sediment, and rinse water are to be disposed?

Whether any controlled waste handling is required or excluded?

Any environmental or site specific compliance requirements?

The provider is responsible for supplying all necessary labor, equipment, materials, and services to properly transport and dispose of waste, minor debris, and other materials at a suitable facility. In line with local, state, and federal environmental regulations, careful handling of controlled waste is essential when disposing of sludge and sediment from potable water storage tanks. This is particularly important if the materials are classified as hazardous or if local rules impose strict limits on the discharge of water with high turbidity.

5. Availability of water supply on site; any restrictions on cleaning or disinfection chemicals?

Yes, the contractor is required to install a tested and operational backflow preventer to safeguard the potable water system.

6. Expected schedule and any operational constraints?

Work is typically scheduled from Monday to Friday, excluding federal holidays, between 0630 and 1530. However, it's strongly advisable to also work through the weekend, if possible, particularly for Tanks 1721, 561, and 10113.

7. Induction, onboarding, and access requirements for working on base; any safety, security, or escort requirements we need to plan for?

Please review Section 7 of the Statement of Work (SOW). The team needs to provide Personally Identifiable Information (PII) in order to process the base pass duration for the work. The Water Operations team can assist with processing the base pass; however, the MUNS team must provide an escort for Tank 10420.

8. Are there any recent inspection reports available?

No

9. Will availability be determined by your ability to have a tank drained? By that I mean, should we anticipate only one tank being made available per mobilization?

Each cleaning operation can only be conducted by one tank at a time due to the limited staff at the water operations shop. Currently, two tanks are out of service, while two others are not used on a daily basis. As a result, the service provider can clean two or more tanks simultaneously, provided that the staffing levels at the water operations shop permit it.

10. “Item 4. on the SOW states a vendor shall be a Certified Water Operator.

This is generally a certification that the facility would own, not a third-party contractor. Please advise if this is required.

The AWWA D102-24 standard for Tank Cleaning outlines procedures that are both professional and sanitary, frequently in alignment with OSHA standards. This process generally includes a thorough inspection of the tank, the removal of sediment, and the disinfection of the tank utilizing materials that are certified under NSF/ANSI 61. Moreover, the involvement of a certified water operator is typically mandated to oversee or execute the cleaning activities, thereby ensuring compliance with the standards set forth by the Safe Drinking Water Act (SDWA)."

AWWA C652-19 outlines the minimum standards for disinfecting potable water storage facilities. It covers the materials used, the methods of application, and the necessary bacterial sampling, which includes tests for coliform bacteria and chlorine residual. Although the standard provides detailed technical procedures for disinfection using chlorination methods, it is crucial for an operator to be present to supervise the process. The base will provide support only for system operation.

11. Will a dedicated confined space rescue team be required to be on site?

All tanks are classified as Permit-Required Spaces. As a result, according to OSHA Standards 29 CFR 1926.1200–1213 (for Construction) and

1910.146 (for General Industry), any contractor planning to enter a water tank is likely required to have a dedicated and trained rescue team either present on-site or readily available.

12. Will a rescue team also be required for work on elevated tanks?

Yes, a confined space rescue team is usually needed for work on elevated tanks classified as "permit-required confined spaces."

13. Is the Contractor responsible for bacteriological water testing, or will this be provided by the base?

The contractor is tasked with handling all bacteriological water testing responsibilities.

14. Is this a new requirement, or is there an incumbent contractor currently performing similar work? If available, could you share the current or previous contract value?

This requirement is not new; every contractor for water projects must provide water testing and comply with all state and federal regulations.