Addendum 4 ITB S-DASOBO-00014831.pdf

STATE OF OREGON

INVITATION TO BID (ITB)

FORMER ST. HELENS FIBERBAORD FACILITY LOWLAND/IN-WATER OPERABLE UNIT

INTERIM REMOVAL ACTION MEASURE (IRAM)

BID# S-10700-00014831

ADDENDUM# 4

ITB# S-DASOBO-00014831 ADDENDUM #4

Former St. Helens Fiberboard Facility Lowland/In-Water Operable Unit Interim Removal Action Measure (IRAM) Page 1 of 4

This Solicitation Addendum modifies the above captioned ITB only to the extent indicated herein. All other areas not specifically changed or otherwise modified by this Solicitation Addendum shall remain in full force and effect.

This Solicitation Addendum# 4 modifies the ITB as follows:

I. Attachment B Technical Specifications – Modify Attachment B as follows:

• Replace Sheet 31 23 16 – 5 with “Addendum 4 31 23 16 – 5”, attached and incorporated herein, updating geotechnical information.

II. Replace Attachment E-2 Additional Reference Documents with “Addendum 4 Attachment E-2 Additional Reference Documents”, attached herein, updating the list of additional documents to include the e-mail with geotechnical information for alternative excavator.

All other areas not specifically changed or otherwise modified by this Solicitation Addendum shall remain in full force and effect.

Requests for clarification, requests for change, and protests of this Solicitation Addendum #4 must be received by DAS by 2:00 PM on day, December 11, 2025 (Pacific time) or they will not be considered. DAS will not consider requests or protests of matters not added to or modified by this Solicitation Addendum (Addendum# 4).

THIS SOLICITATION ADDENDUM MUST BE SIGNED AND RETURNED PRIOR TO THE BID CLOSING DATE AND TIME. THIS ADDENDUM RECEIPT MUST ALSO BE ACKNOWLEDGED BY COMPLETING “ACKNOWLEDGEMENT OF ADDENDA” SECTION OF THE ATTACHMENT A, FORM A-1 - BIDDER INFORMATION AND CERTIFICATIONS FORM. FAILURE TO DO

SO MAY RESULT IN REJECTION OF THE BID AS NON-RESPONSIVE.

Signature: ___________________________________________________ Date: ____________________

Bidder Name: __________________________________________________________________________ (Please Print)

ATTACHMENTS TO THIS ADDENDUM# 4:

Addendum 4 Attachment B Technical Specifications

• Addendum 4 31 23 16 - 5 Addendum 4 Attachment E-2 Additional Reference Documents

Former St. Helens Fiberboard Facility Lowland/In-Water Operable Unit Interim Removal Action Measure (IRAM) Page 2 of 4

ADDENDUM 4

ATTACHMENT B

TECHNICAL SPECIFICATIONS

Addendum 4 31 23 16 - 5

FORMER ST. HELENS FIBERBOARD FACILITY LOWLAND/IN-WATER OPERABLE UNIT

INTERIM ACTION REMOVAL MEASURE SECTION 31 23 16

OREGON DEPARTMENT OF ENVIRONMENTAL QUALITYAddendum 4 31 23 16 – 5 SEDIMENT REMOVAL

BID DOCUMENT: NOT FOR CONSTRUCTION

Dalton, Olmsted & Fuglevand, Inc. 31 23 16 - 5 10/17/2025 addition, the Contractor shall monitor the tidal predictions at the nearest NOAA tidal gauge station (St. Helens, #9439201). The Contractor shall actively monitor predicted weather and tidal levels during this time period and use such predictions to inform Site activities and improve Project effectiveness. Contractor shall promptly notify the Engineer of any predicted weather or tidal events that could impact the Project. The Contractor shall be prepared to discuss actual and potential weather or tidal impacts during progress meetings and more frequently, as needed.

B. The Contractor shall address storm and tidal planning and monitoring in RAWP.

1.8 HOUSEKEEPING

A. The Contractor’s working areas shall be cleaned up by the Contractor on a day-to-day basis and as requested by the Engineer. The Site shall be kept in a clean and orderly fashion at all times.

B. Between CSs and at final completion of all work, the Contractor shall leave the entire premises within the Site of their operations clean, orderly and free from rubbish resulting from the Contractor’s operations.

C. Contractor shall maintain haul roads as necessary including dust control as needed. Road surface shall be maintained and graded to allow safe and efficient truck passage.

PART 2 - PRODUCTS

Not used.

PART 3 - EXECUTION

3.1 EXCAVATOR(S)

A. The Contractor shall provide excavators that are less than 5 years old (Model year 2021 or newer) and have less than 5,000 operating hours.

B. Excavator shall be suitable for operation from constructed haul roads based on the Geotechnical Report (a Komatsu PC900 was evaluated and approved by the Geotechnical Engineer).

1. The maximum track load of a stationary Excavator of 1,940 pounds per square foot (psf).

2. The maximum track load of a stationary Excavator while digging of 2,100 psf (Based on Case CX250D @ ~63,500 lbs).

C. The Contractor shall provide excavators that are capable of picking a full bucket at the extended reach.

D. Where excavation is performed in areas outside of the IRAM Area, buckets for excavators shall be smooth cleanup buckets. Digging buckets with teeth shall not be used for sediment excavation in the IRAM Area nor shall digging buckets with plates welded on teeth.

E. Where sediment excavation is performed in the IRAM Area, buckets for excavators shall be smooth edged clamshell that allows the bucket to close around and fully retain sediment (Environmental clamshell such as Youngs Manufacturing rehandling bucket).

F. The Contractor shall provide excavators able to reach 2 feet past halfway point of the largest distance between the constructed haul roads or the extents of sediment excavation, as shown on the Contract Drawings.

Former St. Helens Fiberboard Facility Lowland/In-Water Operable Unit Interim Removal Action Measure (IRAM) Page 4 of 4

ADDENDUM 4

ATTACHMENT E-2

OTHER REFERENCE DOCUMENTS

[added language is indicated by bold print and italics and deleted language is indicated by strikethrough]

The following site-specific documents are listed herein for reference and are available online at:

https://ordeq.org/ECSI0091ITB

1. Alternative Excavator May 2025 Email Exchange Geotechnical

2. 1. IRAM Optional Bidder Site Access Sign-In (12/3/2025)

3. 2. Mandatory Pre-Bid Sign-In Sheet (11/14/25)

4. 3. Mandatory Pre-bid DEQ Presentation (11/14/25)

5. 4. Mandatory Pre-bid DAS Presentation (11/14/25)

6. 5. Bid CAD Sheets (11/13/25)

7. 6. Bid Set CAD (11/4/25)

8. 7. Data Gaps Investigation (DGI) Report

9. 8. IRAM Investigation Report

10. 9. IRAM Pre-Design Investigation (PDI) Report

11. 10. Supplemental PDI (SPDI) Report

12. 11. IRAM Basis of Design Report

13. 12. Restoration Recommendations Memorandum

14. 13. Geotechnical Evaluation – Sediment Removal Haul Roads

15. 14. Amended Consent Judgment

16. 15. Upland Data Center Prospective Purchaser Agreement

17. 16. Corps Nationwide Permit Verification Letter NWP-2021-190-2

18. 17. DEQ 401 Water Quality Certification

*******THE END OF ADDENDUM# 4********

https://ordeq.org/ECSI0091ITB