Amendment 0010 PPI Responses.pdf

3. PRE-PROPOSAL INQUIRY RESPONSES

Question

Reference Question Government Response

Page Section Paragraph

The documents provided do not appear to have analytical data for the water and soil conditions at either the

P-995 or P-993 sites in terms of contamination. is their analytical data that shows the actual constituents of concern and their concentration levels? type of contamination concentrations will affect what landfills the material can be disposed of and impact the analytical tests that will need to be performed.

Contamination at the site includes petroleum, metals, SVOCs, and PFAS. The available documentation is included as a excerpt from the geotechnical report prepared for the project dated 20

October 2025.

225 C-002

Will Land Use Control Plans be required for work with-in the projects

LOD? Existing studies appear to place the project adjacent to, or possibly w/in OU1.

REVISED RESPONSE:

Project are outside OU1 and

LUC plans are not required.

01 57 19.01

01 57 19.0 20 - 1.1.1.1.5 notes to refer to 01 14 for permitting requirements when excavating into a groundwater table in a Land Use Control (LUC) area. 01 14 00 does not reference LUC requirement Please confirm a LUC plan is not required, as this can take extensive approval time and impact schedule.

Please remove this reference if there is not Operable Unio or Land Use

Control Plan.

REVISED RESPONSE:

Delete section 01 57 19.0 –

1.1.1.1.5. LUC plans are not

required.

398 03 30 00 1.6.10

P-995 - Specification Section 03 30

00, Paragraph 1.6.10 requires a

Thermal Monitoring Control Plan for mass concrete, including embedded temperature sensors, data collection, and reporting.

We acknowledge that certain placements on this project may meet the specification definition of mass concrete. However, based on coordination with suppliers and review of similar NAVFAC and industry projects, full thermal monitoring programs (embedded instrumentation and continuous data logging) are not typically required where thermal performance can be reliably controlled through mix design and placement procedures.

This can be considered during the CA phase but will require a signed and sealed pre-placement thermal analysis and mix design by a registered design professional. Provide bids assuming that continuous monitoring is required.

We request approval of a modified, performance-based approach in lieu of full thermal monitoring, as outlined below:

1. Thermal Control via Mix Design and Placement Procedures

Utilize a concrete mix and placement methodology designed to limit heat of hydration and thermal gradients, including:

o Use of supplementary cementitious materials (e.g., slag, fly ash) o Reduced cement content / low heat mix design o Controlled placement temperature o Insulated curing methods

2. Pre-Placement Thermal Analysis

Submit calculations and/or modeling demonstrating that:

o Maximum internal temperature will remain below specified limits o Surface-to-core temperature differentials will be within allowable ranges

3. Elimination of Continuous

Monitoring

Based on the above, request that the requirement for embedded sensors and continuous temperature monitoring be waived.

4. Verification (If Required by EOR)

If deemed necessary, the Contractor can provide limited field verification

(e.g., surface temperature checks or spot measurements) rather than a full monitoring system.

(End Summary of Changes)