Attach_3_Addendum_No__1___Contract_Document_Corrections_(2026_Re-Solicitation).pdf

Rehabilitate Hurricane Ridge Water System Addendum No. 1 – Contract Document Corrections (2026 Re-Solicitation)

This Addendum No. 1 – Contract Document Corrections (2026 Re-Solicitation) seeks to correct and clarify information from the original (2025) stamped drawings and specifications, including but not limited to: errata, updated dates, typo corrections, coordinate/label corrections, clarifications, administrative updates, or similar.

1. General corrections

• Drawing Sub Sheet C27 Reservoir Details contains a photo of existing 100,000-gallon CIP reinforced concrete reservoir. Complete as-built record drawings are available in PDF format upon written request to the Contracting Officer. See Addendum No. 3 – Hurricane Ridge Water System & Related Photos for interior photos of tank conditions.

2. Specification corrections

• Section 01 11 00, Paragraph 1.3 B: Add subparagraph 2. Hurricane Ridge Access

During Peak Visitation: During periods of high visitation, the Hurricane Ridge parking lot may reach capacity. When this occurs, the NPS Entrance Station implements a one-car-out / one-car-in traffic control system, which may result in significant delays for entering vehicles. To minimize delays:

a. Scheduling: The Contractor is encouraged to schedule material deliveries and ensure personnel arrive on site prior to 10:00 a.m. whenever feasible.

b. Bypass Procedure: When traffic queuing at the Heart O’ the Hills Entrance

Station exceeds approximately 25 vehicles, the Contractor may request authorization to bypass the line. The Government will issue the Contractor a park radio and provide contact information for Entrance Station personnel for this purpose.

c. Authorization: The Contractor shall not bypass queued traffic unless explicitly directed by the Entrance Station ranger via radio or phone.

d. Bypass Execution: Upon receiving authorization, the Contractor shall proceed in the outbound lane, using hazard flashers, and shall not exceed 10 miles per hour while passing the queue. Contractor vehicles shall yield as necessary and exercise heightened caution for visitors who may turn around or reposition their vehicles in the roadway.”

• Section 01 11 00, Paragraph 1.3 C. 1.: Replace target start date of May 5, 2025 with target start date of May 11, 2026.

• Section 01 11 00, Paragraph 1.3 C. 4.: Replace demolition work window start date of August 1, 2025 with a start date of August 1, 2026.

• Section 01 11 00, Paragraph 1.3 F. 11.: Replace final vegetation watering dates between September 15 and October 1, 2025 with watering dates between September 14 and October 1, 2026.

• Section 01 11 00: Add Paragraph 1.8 OTHER CONTRACTS, subparagraph A. Other contracts will be performed at the Hurricane Ridge site during the period of performance of this contract, including installation of structures to provide additional year-round protection for temporary office and restroom trailers.

Coordinate access, staging, utilities, and sequencing as required.

• Section 01 27 00, Paragraph 3.1 B. 1. Replace first sentence with the following: This line item includes replacement of all tank fill and distribution system piping east of (and within) Water Valve Box #2, and all distribution system piping west of (and within) Water Valve Box #1, with DR11 high-density polyethylene (HDPE) pipe and all associated appurtenances including valves, assemblies, meters, and other elements per the drawings, specifications, and addendums.

• Section 02 41 00, Paragraph 1.2 D.: Add the following sentence: The Contractor's ACP Demolition Plan shall be consistent with all requirements of OSHA 29 CFR 1926.1101, EPA NESHAP (40 CFR 61, Subpart M), and all applicable state and local requirements.

• Section 02 41 00, Paragraph 1.2 D.: Add subparagraph 8. Emergency Response Procedures: Provide written procedures for responding to accidental asbestos fiber release or worker exposure during excavation, demolition, handling, or removal of asbestos-cement pipe. At a minimum, include:

a. Immediate actions to stop work, restrict access, and stabilize the area.

b. Procedures for isolating and containing disturbed materials or airborne fibers.

c. Procedures for decontaminating affected personnel, tools, and equipment.

d. Notification steps, including the Competent Person, on-site supervisors, COR, and required regulatory agencies (if applicable).

e. Contact information for emergency medical services capable of evaluating potential asbestos exposure.

f. Procedures for incident documentation and reporting to NPS.

• Section 02 41 00, Paragraph 1.2 D.: Add subparagraph 9. Air Monitoring Plan: Provide a detailed plan describing air monitoring during ACP demolition activities, including:

a. Sampling frequency (e.g., daily during active disturbance, or at intervals consistent with OSHA 1926.1101 requirements).

b. Sampling locations, including personal breathing-zone samples and area samples downwind of excavation.

c. Analytical methods, such as PLM or TEM as applicable.

d. Procedures for maintaining air-monitoring records and reporting results to NPS upon request.

e. Confirmation that exposure monitoring meets or exceeds OSHA 1926.1101 and applicable state requirements.

• Section 02 41 00, Paragraph 1.2 D.: Add subparagraph 10. Exposure Limits and Action Levels: Identify applicable exposure limits for asbestos fibers and demonstrate how the Contractor will maintain exposures below regulatory thresholds, including:

a. OSHA Permissible Exposure Limit (PEL) of 0.1 fibers/cc (8-hour TWA).

b. OSHA Excursion Limit of 1.0 fibers/cc averaged over 30 minutes.

c. Procedures for implementing additional engineering or administrative controls if monitoring indicates levels approaching or exceeding these limits.

• Section 02 41 00, Paragraph 1.2 D.: Add subparagraph 10. ORCAA Notification:

Submit a completed Asbestos/Demolition Notification to the Olympic Region Clean Air Agency (ORCAA) in accordance with Washington State Clean Air Regulations and NESHAP (40 CFR 61, Subpart M). The following requirements apply:

a. Contractor shall prepare, sign, and submit the ORCAA Notification and shall pay all associated fees.

b. Notification shall be submitted no fewer than ten (10) calendar days prior to disturbing any asbestos-containing materials, including asbestos-cement pipe.

c. Include the estimated quantity of asbestos-cement pipe to be removed, demolition methods, project schedule, disposal site, and Contractor contact information.

d. Provide a copy of the complete ORCAA notification and proof of ORCAA acceptance to the COR prior to beginning demolition of asbestos-cement pipe.

e. If project dates change from those listed on the ORCAA notification, Contractor shall submit revisions to ORCAA as required and provide updated documentation to the COR.

• Section 26 05 33.16, Paragraph 2.01 D. 5.: Replace subparagraph c. with the following: Parking stalls and circulation areas within the Hurricane Ridge parking lot shall be considered areas subject to deliberate vehicular traffic due to routine winter snow plowing and grading operations. Underground boxes located in these areas shall comply with AASHTO H-20 loading and shall be tested and certified in accordance with SCTE 77 Tier 22 or higher. Polymer concrete enclosures are not permitted for deliberate vehicular traffic applications.

3. Drawing corrections

• Sub Sheet G01 General Notes, Legend & Abbreviations: Revise General Note 19 as follows: Temporary Water Service Plan: The following sequence describes the proposed temporary water service configuration required to supply non-potable water to the temporary office and restroom trailers during construction. The Contractor shall implement this plan unless an alternate approach is submitted in writing and approved by NPS.

a. Notification & Coordination:

Notify NPS prior to any shutdowns.

Obtain approval of the temporary water service schedule before beginning work.

b. System Isolation:

Shut down the well.

Close all valves into and out of the reservoir to isolate the tank from the active tank-fill and distribution systems.

c. Distribution Main Modifications:

Sawcut, remove, and properly dispose of asphalt or concrete as required to access the work.

At the location shown in Figures 48 and 49 of Addendum No. 3, disconnect the existing 6-inch C900 water line from the 6-inch asbestos-cement distribution main.

Cap the 6-inch C900 distribution main east (upstream) of the existing 1½-inch HDPE service line that supplies the temporary facilities.

d. Temporary Water Supply Connection:

At Valve Box No. 2, excavate to expose the 2-inch HDPE reservoir fill line and the 2-inch HDPE comfort station service line.

Disconnect the existing 2-inch HDPE reservoir fill line from the 3-inch galvanized reservoir fill line.

Cross-connect by cutting into the 2-inch HDPE comfort station service line, establishing a direct flow path from the well toward the temporary facilities.

e. Temporary Pressure System:

Furnish and install four (4) 119-gallon WX-350 Well-X-Trol pressure tanks, factory pre-charged to 38 psi.

Connect all tanks to the existing 1½-inch HDPE service line serving the temporary facilities.

Provide physical protection for the tanks and all exposed piping for the full duration of temporary service.

f. Temporary Pressure Control/Instrumentation:

Install a Rosemount 2051 pressure transmitter (176/196 psi range) on the water main inside the well house.

Integrate the transmitter into the well’s control system to maintain stable pressure under temporary operations.

Adjust pressure settings as required to ensure proper system function.

Provide protection for all temporary controls, wiring, and instrumentation.

g. Commissioning of Temporary System:

Activate the temporary system.

Verify adequate non-potable water service to the temporary office and restroom trailers.

Confirm stable well operation with the temporary control scheme.

h. Restoration After Construction (Refer also to Sub Sheet C15 for permanent system connections.):

Install and confirm the permanent connection between the new 4-inch

HDPE and the existing 2-inch HDPE comfort station service line (Key Note 3).

Re-establish the reservoir fill connection by tying the existing 2-inch HDPE reservoir fill line to the new 4-inch HDPE reservoir fill line (Key Note 4).

Make the permanent connection between the new 6-inch HDPE distribution line and the existing 1½-inch HDPE service line serving the temporary facilities (Key Note 17).

Remove or disengage all temporary pressure controls, including the pressure transmitter.

Restore the well control system to the final configuration shown in the contract documents.

Remove all temporary pressure tanks.

Cap and abandon in place all temporary and original water lines that are not part of the final system.

i. Alternate Approach:

Contractor may propose an alternate temporary water supply plan, but no deviations shall be implemented without prior written NPS approval.

• Sub Sheet E02 Electrical Control Site Plan: Revise Plan Note 3 as follows: Control

Wiring Conduit Routing: The two control-wiring runs shown separately on this sheet shall be installed in shared conduits, as follows:

a. From Existing Well Building to X-UGB: Both control-wiring runs shall share the existing 1¼-inch conduit between the well building and X-UGB.

b. From X-UGB to UGB1 to UGB2: Both control-wiring runs shall share the new 2-inch conduit installed along this alignment, within the new water line trench.

c. From UGB2 to UGB9: A new 2-inch conduit deviates from the water-line trench carrying only the conductors serving CP2, as shown on Sub Sheet E04.

d. Base Bid Requirement: Provide and coil a minimum of 100 feet of additional CP2 conductors within UGB9 for future extension by others.

e. Option B – Remote Monitoring (if awarded): Install new conduit from UGB9 to the Temporary Utility Building and complete the conductor installation to CP2 furnished and installed under this option.

f. Existing Conduits: Three existing 3-inch conduits (two occupied, one vacant) currently extend from X-UGB2 to the Temporary Utility Building, and a separate 3-inch conduit extends from X-UGB2 to the Temporary Trailers. These are shown in red below and in Figures 44, 45, and 49 of Addendum No. 3 – Hurricane Ridge Water System & Related Photos. Contractor shall be responsible for locating and avoiding damage to existing utilities.

4. Clarifications

• Temporary Water Service Plan Revisions to the temporary water service plan (General Note 19 on Sub Sheet G01) are provided above under Item 3, Drawing Corrections. Construction notes or callouts referring to “above-ground” temporary bypass piping for the reservoir fill, storage, or distribution lines do not apply to the corrected temporary configuration.

The illustration below identifies key locations referenced in the revised Temporary Water Service Plan and is provided for clarification only to assist in understanding system flow paths and construction sequencing.

19.c Disconnect 6” C900 water line from 6” AC distribution main and cap upstream of 1.5” HDPE service line to temporary facilities.

19.d Expose lines at Valve Box #2 and cross-connect 2” HDPE reservoir fill line to 2” HDPE comfort station service line to establish a direct flow path from well to temporary facilities.

19.e Connect pressure tanks to 1.5” HDPE service line for temporary facilities. This location is suggested because lines will be exposed for capping C900 water line in 19.c.

2” HDPE

COMFORT

STATION

SERVICE

LINE

2” HDPE TANK FILL

LINE & COMFORT

STATION SERVICE

LINE (SAME TRENCH) 3” GALVANIZED

TANK FILL LINE

6” ASBESTOS CEMENT

DISTRIBUTION MAIN

1.5” HDPE

TEMPORARY

FACILITIES

SERVICE LINE

6” C900

DISTRIBUTION

MAIN

• Temporary Water Service Demand Typical water demand for the temporary trailers varies seasonally. Estimated demand is based on:

• Metered wastewater flow, which reflects wastewater generated solely from the temporary trailers; and

• Metered water production, which supplies both the temporary trailers and the two picnic-area comfort stations located along Hurricane Hill Road and operated seasonally (June–September).

The picnic-area comfort stations discharge to separate septic systems; therefore, their flows do not appear in the wastewater data.

The graphs below show average daily water and wastewater flows by month for 2024–2025 to assist the Contractor in planning for temporary water service.

Peak-day demands (e.g., holiday weekends) may be significantly higher than monthly averages and shall be accounted for in sizing and scheduling temporary water supply.

10000

Av er ag e

D ai ly W at er

P ro du ct io n

(G

PD

Hurricane Ridge Water System ID# NP3904 - Water

Production

2024 2025

Av er ag e

D ai ly W as te w at er P ro du ct io n (G

PD

Hurricane Ridge LOSS CLM045 - Wastewater Flow (Temporary Trailers Only)

2024 2025

• NON-PCB Electrical Transformer (Option A – Demolition):

Clallam County PUD’s equipment records confirm that the pump house transformer labeled 14989, which is slated for demolition under Option A, was manufactured in 1984, after the end of PCB usage in utility transformers. Therefore, it is classified as a NON-PCB transformer under 40 CFR 761. Nameplate information may be reviewed during demolition, but no PCB sampling is required for disposal.