Attachment J - Added SOW_Ridem Permit_Test Pit_ Retention.pdf

Revised Oct 2007

DEPARTMENT OF THE NAVY

NAVAL FACILITIES ENGINEERING COMMAND, MID ATLANTIC

PUBLIC WORKS DEPARTMENT, NAVAL STATION NEWPORT

ONE SIMONPIETRI DRIVE

NEWPORT, RHODE ISLAND 02841-1711

AMENDMENT

DATE: March 19, 2021

PROPOSED TASK ORDER: N4008521R0164 Design-Bid-Build, Repair B3 Mahan Hall, Naval War College, Naval Station Newport, Newport, RI

DATE OF SOLICITATION: February 12, 2021 HUBZONE MACC CONTRACT

HOLDERS

THIS AMENDMENT INCLUDES:

-ADDED SCOPE OF WORK FOR B3 MAHAN HALL -

1- Base Bid – Apply and Obtain RIDEM Permit 2- Base Bid – provide test pit, report findings, obtain RIDEM permit 3- Option 1 – revise design for subsurface retention system 4- Issue AE Stamped/Signed drawings and specifications

-REVISED BID SCHEDULE TO INCLUDE ADDED SCOPE OF WORK FOR B3

MAHAN HALL: RIDEM Permit, Test Pit, and Revised design for subsurface retention system

ADDED SCOPE OF WORK FOR B3 MAHAN HALL – RIDEM Permit

Background Information:

On 1/28/2021, Naval Station Newport Environmental Department filed an Application for Stormwater Construction Permit and Water Quality Certification (WQC# 21-016, UIC# 002024) with the Rhode Island Department of Environmental Management (RIDEM), Office of Water Resources – Groundwater and Wetlands Protection for project solicitation N4008521R0164 Design-Bid-Build, Repair B3 Mahan Hall, Naval War College, Naval Station Newport, Newport, RI. RIDEM has issued a Request for Additional Information (RAI) dated 2/24/2021. Based on the RIDEM RAI, below is Amendment Scope of Work to be included as part of contract documents for Solicitation N4008521R0164 Design-Bid-Build, Repair B3 Mahan Hall, Naval War College, Naval Station Newport, Newport, RI.

Scope of Work - Base Bid:

1-The Contractor shall file, obtain, and pay all required fees, $400, for second Application for Stormwater Construction Permit and Water Quality Certification (WQC# 21-016, UIC# 002024) with the Rhode Island Department of Environmental Management (RIDEM), Office of Water Resources.

2-Contractor shall provide and install ONE test pit within the boundaries of the proposed subsurface retention system, located in Mahan Hall courtyard area, which has limited access. The test pit must be executed in accordance with the RIDEM Groundwater Discharge Rules and the CRMC RI Stormwater Design and Installation Standards Manual. The Contractor must provide a Test Pit Plan, and drawings, indicating size and depth, sloped walls, of proposed test pit. The Test Pit plan must be approved by NWC and NAVFAC CM, and NSN Environmental Dept. prior to start of the work. The Test Pit Plan must follow all requirements for safety and quality control per the contract documents. The test shall determine the soils information from test pits or borings at the location of proposed stormwater management facilities, including but not limited to soil descriptions, depth to seasonal high groundwater, depth to bedrock, and estimated hydraulic conductivity. Soils information will be based on site test pits or borings logged by a DEM-licensed Class IV soil evaluator or RI-registered PE. The Contractor must repair (fill test pit and resod) the test pit area in accordance with requirements as noted in NAVAL Station Newport Soil Management Plan.

3-The Contractor must provide a Report of Findings, as accepted by NWC, NAVFAC CM and NAVFAC Environmental Department. Once accepted, The Report of Finding to be submitted to NAVFAC. The design of the subsurface retention system will be evaluated for compliance with RIDEM Stormwater Design and Installation Standards Manual. NAVFAC will determine if a revised design is necessary.

4-This scope of work must be completed prior to start of any demolition work noted in the construction contract documents, and be completed prior to ISS beginning August 30, 2021. No work for Option 1 to provide and install new connector addition, or subsurface retention system, may commence without obtaining the Stormwater Construction Permit and Water Quality Certification (WQC# 21-016, UIC# 002024) with the Rhode Island Department of Environmental Management (RIDEM), Office of Water Resources.

Scope of Work – Option 1:

Revise Drawing C-503, Detail B5, Porous Pavement Walkway, to include the following cross-section:

“o Pervious Pavement: 3” of porous asphalt o Choker Course: 2” thickness of ¾” crushed stone o Filter Course: 8” thickness of subbase ASTM C-33 sand o Filter Blanket: 3” thickness of 3/8” pea gravel o Reservoir Course: 4” thickness of ¾” crushed stone”

Issue AE Stamped/Signed drawings and specifications:

Replace all drawings and specifications issued on date of solicitation, February 12, 2021, with issued AE stamped/signed drawings/specifications provided with this Amendment dated 3/19/2021.