Ultrasonic Testing and Report for Dry Dock Caisson

Amendment / Modification

This amendment (0003) provides answers to several questions previously posed by potential offerors regarding the solicitation.

Key clarifications include:

• Diver Requirements (Q2/A2): An 'Engineer Diver' is defined as a person capable of diving and certified to perform underwater measurements. This is a specific certification, not just a naming convention.
• Caisson Hull Exposure (Q3/A3): In its seated position, 75-90% of the caisson hull is underwater, with one side exposed to the bay and the other dry and exposed to the basin.
• Baseline Data (Q4/A4): The government does not possess baseline thickness data or drawings for the caisson.
• 'Seated Position' Definition (Q5/A5): This refers to the dry dock being drained and the caisson resting on the sill, accessible from within the empty dock.
• Diver Scope (Q6/A6): Divers are anticipated for underwater inspection of the hull below the waterline, specifically in areas inaccessible from the inside due to solid concrete ballast.
• Rope Access vs. Divers (Q7/A7): Rope access would only allow inspection of approximately half the exterior hull plating due to the wet/dry separation by ballast tanks. Divers are specifically required for the wet side.

This amendment primarily addresses clarifications related to the Statement of Work (SOW) and potential diver requirements.

While this amendment provides crucial clarifications, it does not appear to modify the proposal submission deadline or other key submission requirements based on the provided text.

Amendment / Modification

• This amendment extends the RFQ due date.

• RFQ due date

• The proposal submission deadline has been extended to February 10, 2026, by 11:00 AM (Pacific).

Amendment / Modification

This amendment provides an answer to a vendor question regarding the availability of drawings for the Caisson.

This amendment addresses a specific question about drawings, but does not modify specific sections of the original solicitation or contract.

Bidders can request Caisson drawings by emailing Contract Specialist Edward Dean (Edward.b.dean5.civ@us.navy.mil) and cc'ing Suzanne Shin (Suzanne.j.shin.civ@us.navy.mil). This information may be relevant for bidders preparing proposals or understanding the scope of work.

Statement of Work (SOW) / Performance Work Statement (PWS)

To provide engineering services to support and manage Ultrasonic Testing (UT) activities and the preparation of a UT inspection report for the Graving Dock Caisson at Naval Base, San Diego, CA.

• Perform ultrasonic testing on the plating of the entire hull, top deck, machinery deck, internal strength decks, bulkheads, and buoyancy chambers.

• Measurements will be taken on an 8'-0" on-center (o.c.) grid for hull plating and on a 6'-0" o.c. spacing for ballast tank and machinery deck internal structural members.

• Testing will also be performed on ballast tank and machinery deck internal structural members, including plate stiffeners, truss frame members, and closure gate plate stiffeners.

• Prepare a UT inspection report documenting test locations, measured thicknesses, and estimated percentage of material loss relative to baseline thickness.

• Perform all Architect-Engineer (A-E) Services required under the contract.

• The UT Inspection Report must document test locations, measured thicknesses, and percentage of material loss.

• Period of Performance: February 19, 2026 - June 1, 2026

• Location: U.S. Navy San Diego Graving Dock Southwest Regional Maintenance Center, Bainbridge Street Bldg. 82 2nd Floor, San Diego, CA. 92136

• The contractor shall coordinate with subconsultants to perform ultrasonic testing.

• The contractor shall not remove or disturb the intact coating system of paint on the Caisson.

• Readings will be taken through paint.

• The Caisson contains coated steel plating.

• Portions of deck plating are covered with a non-skid coating, requiring readings from the underside and potential scaffolding.

• Three ballast tanks (Main Ballast Tank, Trim Tank C, and Trim Tank D) will need to be dewatered one at a time. SWRMC will need 24 hours to fill any empty tank and dewater the next tank for surveying.

• These areas are considered confined spaces, requiring appropriate measures for entry and potential fall protection.

• A Safety Plan/Accident Prevention Plan (APP) must be prepared and submitted for approval prior to each field investigation.

• An "A-E Site Visit Request" must be prepared and submitted for approval prior to each field investigation.

• NBSD Defense Biometric Identification System (DBIDS) procurement is required for entry.

• Safety Plan/Accident Prevention Plan (APP)

• Ultrasonic Testing (UT) Inspection Report

• Survey of measurements inside Caisson Ballast Tanks must be completed by March 16, 2026.

• Final UT Survey Report must be submitted by June 1, 2026.

Questions & Answers / Clarifications

This document contains a question submitted by a contractor regarding Solicitation N5523626Q0020, specifically concerning Ultrasonic Testing and Report for Dry Dock Caisson.

• Contractor Question: The document indicates a contractor question was submitted, but the specific question is not provided in the text. It is intended for "SWRMC USE ONLY" for technical and planner reviews.

This document is a record of a contractor question and internal review process. The actual question and its answer, which would impact the solicitation, are not present in the provided text. It serves as a placeholder for a question and its subsequent review and resolution.