Northumberland County Drainfield Addendum No.3.pdf
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- Solicitation number
- 48773
- Issued by
- Northumberland County, Virginia
About this file
This document is Addendum No. 3 for the Northumberland County High/Middle School Sanitary Treatment Modification Project. The project is being prepared for Northumberland County, Virginia and is being managed by Mangrum Consulting & Design. The addendum amends the original contract dated November 14, 2023 and includes changes to the drawings, specifically related to forcemain pressure testing requirements. The project scope involves furnishing and installing five 9,000 gallon precast concrete septic tank structures, submersible pumps, precast valve vaults, flow meters, a modulating control valve, approximately 2,500 LF of 2-inch HDPE forcemain, associated electrical and controls, and a 2,500 LF fiber optic network. The work is to be completed at two locations - the High/Middle School and the Elementary School.
The addendum does not contain any information about pricing, set asides, incumbents, funding, or other salient commercial terms. It focuses solely on technical clarifications and revisions to the project drawings and specifications.
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Text version
Addendum No.3 for the
Northumberland County High/Middle School Sanitary Treatment Modification Project
Prepared For Northumberland County
72 Monument Place Heathsville, VA 22473
Prepared by C. Robert L. Mangrum, P.E., BCEE
Mangrum Consulting & Design
1500 Clayton Avenue
Lynchburg, VA 24503
Addendum Date: January 15, 2024
This Addendum No. 3, dated January 15, 2024 amends or supplements the Contract Documents titled Northumberland County High/Middle School Sanitary Treatment Modification Project Dated November 14, 2023 as indicated below:
Changes to Drawings:
Item 1: Sheet D-002, add the following:
“J. Forcemain Pressure Testing:
1. All pressure pipelines shall be thoroughly blown out under pressure and cleaned of foreign matter before testing. Care shall be taken to prevent objectionable matter from entering the piping systems.
2. All new force mains shall be pressure tested in accordance with ANSI/AWWA C600.
3. Force mains shall be filled with clean water and subjected to a hydrostatic pressure of 75 psi, measured at the highest point along the test section, for a period of 2 hours.
4. The test pressure shall not vary by more than +/- 5 psi for the duration of the test. The maximum allowable leakage in gallons shall be based on the AWWA C600-05 formula.
5. All temporary piping, test equipment, and blocking shall be provided by the Contractor.”
Changes to Project Manual:
None.
Questions & Responses:
Attachments
END OF ADDENDUM NO. 3
END OF ADDENDUM NO. 3
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