B09_Amd0001_Attach2_Q_A_0001.pdf
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- Solicitation number
- 140L4326R0003
About this file
This is a Questions and Answers document (Amendment 0001 – Attachment 2) for Solicitation No. 140L4326R0003, the Medford Hot Water Heaters Replacement project for BLM Medford District, Oregon. The document addresses 12 contractor inquiries regarding project specifications and requirements. Key technical clarifications include: the roof is a flat, built-up fiberglass and hot asphalt roof with rock surface; water delivery is at 2 PSI; seismic design engineering is not required, but units must be secured per 2023 Oregon Plumbing Specialty Code; concentric venting is acceptable with contractor verification of manufacturer requirements; and only multiple unit installations are permitted (not single integral tankless units). The Contracting Officer's Representative (COR) is onsite Monday to Friday, 6:00 AM to 4:30 PM.
Additional specifications address installation requirements: expansion tanks must comply with 2023 Oregon Plumbing Specialty Code and manufacturer requirements; contractors are responsible for extending the equipment pad if seismic strapping is needed; core drilling is prohibited in the interior back wall; existing B-vent roof penetrations are acceptable for PVC venting paths with contractor verification; abandoned B-vents must have interior components removed and roof/ceiling penetrations capped; and the existing hot water recirculation pump shall remain in service. These clarifications establish contractor responsibilities for design verification, structural modifications, and compliance with applicable codes and manufacturer specifications.
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Amendment 0001 – Attachment 2 Medford Hot Water Heaters Replacement Solicitation No. 140L4326R0003 BLM Medford District, Oregon Page 1 of 3
Questions and Answers No. 1-12
Q1: What is the roof type, is the roof a flat roof?
A1: The roof is a flat roof, built up fiberglass and hot asphalt roof with rock on surface (see pictures). See attached specs from original installation for any modification to roof.
Q2: Is there 2-pound delivery to the units?
A2: The meter is a two (2) PSI meter.
Existing Water heater vent
Existing regulator vent
Existing boiler vent
Amendment 0001 – Attachment 1
BLM Medford District, Oregon Page 2 of 3
Q3: Will the project require engineered seismic design due to the weight of the units?
A3: No, secure water heaters per 2023 Oregon Plumbing Specialty code.
Q4: Will the units be able to use inside air for make-up air or will a concentric vent be needed?
A4: Using a concentric vent is acceptable, Contractor to verify for proposed water heater manufacturer venting requirements to be met.
Q5: Is the BLM open to one unit installation with an integral tankless heater?
A5: No.
Q6: What are the working hours for the project?
Amendment 0001 – Attachment 1
BLM Medford District, Oregon Page 3 of 3
A6: The COR is onsite 6am-4:30pm Monday to Friday.
Q7: Expansion Tank: Please confirm whether a new ASME-rated 2.5-gallon expansion tank shall be provided with the installation of the new water heaters, as no existing expansion tank is shown or identified in the Scope of Work.
A7: Installation shall meet requirements in the 2023 Oregon Plumbing Specialty code and water heater manufacturer requirements.
Q8: Equipment Pad / Seismic Strapping: The existing water heater pad does not extend to the rear wall, which prevents proper installation of seismic strapping. Please clarify whether the contractor is responsible for extending the existing equipment pad to allow proper seismic anchoring.
A8: Contractor is responsible for extending the equipment pad if seismic strapping is intended.
Q9: PVC Sidewall Venting: Please confirm whether the contractor may core drill the wall behind the water heaters and vent the new units using PVC exhaust piping through the sidewall above the water heaters.
A9: The wall behind the water heaters is an interior wall, core drilling is not allowed in back wall.
Q10: Use of Existing B-Vent: Please clarify whether the contractor may run the PVC exhaust vent through the existing B-vent and continue through the existing venting path.
A10: Contractor to verify Existing B vent can be used with new water heaters, B-vent roof penetration is acceptable for use as roof penetration for PVC venting path.
Q11: Existing B-Vent Abandonment: If the new water heaters are vented in PVC, please confirm whether the existing B-vent should be capped or otherwise abandoned.
A11: If B-vent is abandoned, remove interior vent and cap vent on roof and near ceiling.
Q12: Hot Water Recirculation Pump: Please clarify whether the existing hot water recirculation pump is to remain in service or if a new pump is required as part of this project.
A12: Existing pump is to remain in service.
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