Attachment 0003B - RFI Answers.pdf
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- Attached to
- Y1DA--679-21-102 | Correct Failing Sanitary Sewer, Water Main, and Fire Protection Deficiencies
- Solicitation number
- 36C24725R0044
About this file
This document is a Request for Information (RFI) Answers attachment for a Department of Veterans Affairs project at the Tuscaloosa VA Medical Center. The RFI addresses technical specifications and clarifications for water utilities, including hydrostatic testing, water piping, backflow preventers, and meter installations. Key clarifications include: sanitary sewer work is not part of this project, hydrostatic testing can be performed after backfilling, video recording of water piping is not required, backflow preventers will be RPZ Assemblies with enclosures, and magnetic or positive displacement flowmeters meeting specific standards can be used. The document also provides guidance on meter and backflow sizing for various building connections and confirms that directional drilling can be used in areas originally specified for jack and bore installation methods.
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TUSCALOOSA VA QUESTIONS
1. The name indicates that this project includes correcting failing sanitary sewer.
Please confirm that sanitary sewer installation and / or repairs are not included in this project.
2. SPECIFICATION SECTION 33.10.00 WATER UTILITIES
a. 3.19.A specifies that the hydrostatic testing must be performed prior to backfilling. Is it acceptable to perform the test after backfilling per typical industry standards?
b. 3.19B requires video recording all piping from the building to the municipal connection. This is not a typical requirement for water piping. If required, piping will have to remain open at tee connections and bends to allow for camera inspection. Will video recording of water piping be required?
3. BACKFLOW / RPZ
a. Please confirm that all service Backflow Preventers are RPZ Assemblies with
Enclosures.
b. Is heating required at RPZ locations?
c. If heating is required, please confirm source and routing of required power.
4. METER SPECIFICATION 25.10.10
a. 2.7.2 states to provide magnetic flowmeters. Please clarify where mag meters are required.
b. Please clarify the type of meters required at small diameter locations.
5. METER & BACKFLOW SIZING
a. There are multiple locations that indicate meters and backflows sized significantly smaller than the service line diameter. Please confirm that our pricing should reflect meters and backflows per the sizing stated in the drawings.
b. For example, Building 63 service line, shown below (Dwg C-205)
i. 4” branch reduces to a ¾” Meter, then increases to a 3” PE service, then reduces to a 1” Backflow, then increases to a 3” PE service, then ties into the existing 4” service.
RFI Answers - Attachment 0003B bbutler Typewriter Sanitary sewer installation and repairs are not a part of this project.
bbutler Typewriter Yes. Hydrostatic testing can be performed after backfilling.
bbutler Typewriter This is not required.
bbutler Typewriter That is correct. All Backflow Preventer are RPZ Assemblies with enclosures.
bbutler Typewriter No bbutler Typewriter Magnetic and positive displacement flow meters which meet 331000 & 251010 which are Neptune or equivalent can be used for this project.
bbutler Typewriter See response above.
bbutler Typewriter Yes. Use sizes provided, except for Bldg 146 which is 2" BFP Assembly and 1.5" Meter.
bbutler Typewriter This meter and BFP size are correct.
6. JACK & BORE
a. Is there a size and wall thickness requirement for steel casing pipe?
b. There are several locations that indicate deflection along the casing installation path, which is not possible via Jack & Bore methods. See below example. Please confirm that it is acceptable to utilize Directional Drilling in these areas.
bbutler
Directional drilling will be used.
bbutler
Directional drilling will be used.
File details come from the government source that posted it. Updated .