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

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

1) Do you have an engineer's estimate or range for this project?

Answer: The estimated Project cost is $50,000,000 as indicated in section A.6 Project Cost Estimate and Funding of the ITB. This engineer’s estimate includes all Base Bid, Alternates, and DEQ/GSI/DOF project and construction management.

2) Can we request the AutoCAD files for this project?

Answer: The CAD files (2025-11-04-0091 Bid Set CAD) are now loaded and available with the other E-2 documents: https://ordeq.org/ECSI0091ITB

3) Will CAD files be made available for bidding purposes? These files are crucial for us to ensure accurate and competitive bidding.

Answer: See answer to the question# 2.

4) I noticed that within the bid package forms under the record of satisfactory performance, it states that "the bidder shall provide the information below for 3 different projects completed within the past 10 years." Would it be possible to expand this timeframe to include projects completed within the past 25 years? This adjustment would allow us to showcase a broader range of our experience and capabilities.

Answer: No. Timeframe remains limited to past 10 years.

5) Can CAD files be made available for the Former St. Helens Fiberboard Facility project for bidding purposes? I understand if a waiver needs to be signed.

Answer: See answer to the question# 2.

6) Section 01 11 00-1.3,D of the Specifications states that “work below the Ordinary High Water

(OHW) elevation 17.5 North American Vertical Datum of 1988 (NAVD88) shall only be performed during the In-Water Work Periods (IWWPs) of July 1 to October 31 of each Construction Season (CS).” Is the in-water work limited to these dates based on a certain fish window? If sufficient work area isolation, bypassing, and initial fish capture/release can be implemented, could an exception be granted to extend the IWWP?

Answer: Yes, the work is limited by the fish window. The contractor is expected to complete the earthwork below OHW within the IWWP

7) Section 01 35 29-1.1,F of the Specifications states that the “Contractor shall be responsible for ensuring that the Contractor’s Safety personnel are onsite at all times during regular work hours and on call during off hours.” Please confirm that this project must have a dedicated Health and Safety Officer, and that this role cannot be filled by the Project Superintendent.

Answer: This project must have a dedicated Health and Safety Officer https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

8) Section 01 31 19-3.1,C of the Specifications states that the “Contractor representatives, including Project Manager, Construction Manager, the Lead Field engineer, Superintendent, Contractor’s Quality Control (QC) Manager, and HSO” shall attend the pre-construction meeting. Which of these roles must be filled by onsite personnel, and which roles can be filled by offsite personnel? Can any of these roles be filled by the Construction Water Management Foreman or Excavation Foreman called for in Section 01 14 00-1.6,A of the Specifications?

Answer: Each of those positions are unique and should be held by a single responsible person. “Construction Manager” is subject to each Contractor’s company structure, and can be filled by a different title.

9) The Specifications indicate that utilities must be located prior to construction activities. Is a private utility locate required or is completing the utility locate process through Oregon 811 sufficient?

Answer: Private locating services are required.

10) Section 02 21 00-2.1,A of the Specifications states that the Post Excavation As-Built Survey

“will be based on a mosaic of daily as-built surveys for each daily excavation area.” If the Contractor’s daily construction surveys are conducted using control points established by a licensed surveyor, will the Contractor’s data be accepted for this mosaic? Or will the Contractor be required to have a licensed surveyor on Site daily? The same question applies to active backfilling operations.

Answer: This data will be accepted as long as it's delivered by a 3rd party licensed surveyor provided by the Contractor.

11) In order to allow the bidders to complete takeoffs and verify quantities, please provide the

CAD files used to generate Figures C-1, C-15, C-20, C-21, C-22, C-23, C-24, C-25, C-26, C- 27, C-28, C-29, C-30, C-32, C-33, C-34, C-41, C-43, C-45, C-46, C-47, C-52, C-63, and C- 69.

Answer: The CAD files (2025-11-13-0091-CAD Sheets) are now loaded and available with the other E-2 documents: https://ordeq.org/ECSI0091ITB

12) What are the applicable warranty periods and requirements for this project?

Answer: See Subsection B.3 Materials and Workmanship under Section B Administration of the Contract and subsections I.1 Correction of Work Before Final Payment and I.2 Warranty Work under section I. Correction of Work of the Attachment D-4 General Conditions (State of Oregon General Conditions for Public Improvement Contracts, January 1, 2012 Edition). See also Attachment B – Technical Specifications Section 32 90 00 Part 2 – Products 2.3 Plant Warranty. Also, see A.7 Key Project Dates, A.8 Liquidated Damages for important dates, and SGC Section G.1 in this ITB for Contractor’s https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) responsibilities for all damages arising from the Contractor’s failure to complete Work by the completion dates set forth in A.8 of the ITB.

13) Is a particular landscape license required for any of the plantings or restoration work?

Answer: Not that we are aware of.

14) Do the water treatment personnel require any specific licenses, certifications, or qualifications?

Answer: Nothing other than the experience required in the ITB

15) Does this project require the addition of the Hazardous Waste Removal Differential, which is referenced in the BOLI Prevailing Wage Rates document, to the base prevailing wage rate for power equipment operators? If so, what is this differential in dollars per hour?

Answer: pp. 22-24 of the most recent BOLI PWR Book speaks to this: BOLI July 5, 2025 Prevailing Wage Rate Book "Note: A Hazardous Waste Removal Differential must be added to the base rate if work is performed inside the boundary of a Federally Designated Waste Site. For information on this differential, call the Prevailing Wage Rate Coordinator at (971) 245-3844." This is not a Federally Designated Waste Site.

16) If there is an existing waste profile for the impacted sediment, please provide it. If a waste profile cannot be provided, please provide analytical reports from previous soil sampling events to allow bidders to obtain accurate waste disposal pricing.

Answer: See the IRAM Investigation Report (GSI, 1/27/2025) available with the other E-2 documents: https://ordeq.org/ECSI0091ITB

17) Please provide specific guidelines for salvaging, storing, protecting, and replanting the Wapato tubers and willow cuttings.

Answer: The means and methods for this task are at the Bidders discretion within the framework provided in the specifications. Consultation with experts, such as native/wild food growers or plant nurseries is recommended.

18) Section 32 90 00-3.6 of the Specifications calls for the installation of a temporary aboveground irrigation system that will be removed as needed during the wet season and fully removed two years after the final planting. Per the Specifications, “Irrigation

(is) required for Subarea 2, the portion of Subarea 1 that is not regularly inundated [above elevation 8.5 NAVD88], and the uplands area only. Does not apply to Subareas 3 or 4.” Can the Engineer provide a figure depicting the extents of the temporary irrigation?

Answer: The means and methods for this task are at the Bidders' discretion within the framework provided in the specifications.

https://www.oregon.gov/boli/workers/Prevailing%20Wage%20Rate%20Books/BOLI%20July%205,%202025%20Prevailing%20Wage%20Rate%20Book.pdf https://www.oregon.gov/boli/workers/Prevailing%20Wage%20Rate%20Books/BOLI%20July%205,%202025%20Prevailing%20Wage%20Rate%20Book.pdf https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

19) Please confirm the water source and line pressure for the temporary irrigation system.

Answer: Contractor shall provide site water needed to complete the Work and shall install and maintain necessary supply connections for same. Fire hydrants are expected to be available at the site and any water obtained from onsite hydrants shall be coordinated by the Contractor and measured using a certified and approved hydrant meter.

20) Drawing C-26 calls for a 12-inch HDPE culvert to be installed at the swale crossing. The drawing references Detail A on Drawing C-40, but that detail does not depict the culvert. Is this pipe the 12-inch corrugated ADS N-12 WT IB pipe listed in Specifications Section 31 05 16-2.16?

Answer: Yes

21) Are all temporary culverts called out on Drawing C-52 12-inch corrugated ADS N-12 WT IB pipe?

Answer: Yes

22) Detail B on Drawing C-40 shows 8 oz non-woven geotextile and 30-mil pvc liner extending over the perimeter ecology blocks at the SPA and Water Treatment Area. Are sandbags sufficient for securing the liner and geotextile to the ecology blocks?

Answer: It is the onus of the Contractor to appropriately secure liner and geotextile over the block for duration of project.

23) The basis of payment for Bid Item 026 (Debris Removal Subareas 2 and 3) is lump sum.

Please provide the estimated debris quantity and/or means for the bidders to estimate the debris quantity.

Answer: Contractor to estimate effort as part of the bidding process using information provided in the ITB and gathered from the bid walk.

24) Please clarify the ratio of sand to activated carbon for Bid Item 034 (Place Import Materials

Subarea 2). Will the carbon amendment be proportioned by volume or weight?

Answer: 1% activated carbon by weight is proposed.

25) Bid Item 028 (IRAM Excavation, Loading, and Hauling to the SPA) contains a quantity of

52,000 cubic yards. Bid Item 035 (Sediment Rehandling, Stabilization, Trucking Lining, Traffic Control, and Loading) contains a quantity of 140,000 tons. Please provide the basis for the quantity (140,000 tons) of Bid Item 035.

Answer: “IRAM Excavation, Loading, and Hauling to the SPA” represents the cubic yards for the remedial excavation. There are several other sources of waste associated

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) with the project including road surfacing, road fill that is not permanent, and sacrificial fill for incremental stabilization of excavation areas that form the basis of volume for Bid Item 035.

26) Section 01 35 29-3.3,A of the Specifications state that “all onsite employees with potential for coming into contact with impacted sediment, water or working within the exclusion zone shall have current OSHA 40-Hour HAZWOPER training (including a current 8-hour refresher class, as appropriate.” Does this requirement apply to restoration and/or planting activities that occur after the primary IRAM excavation?

Answer: Restoration and/or planting personnel do not require HAZWOPER. They should not come in contact with impacted sediment, water, or work in an exclusion zone.

27) Please clarify the basis of payment for Bid Item A-01b (Hazardous Material Abatement).

Should the basis of payment be by the ton?

Answer: It is not expected there to be tons of material. The basis of payment is based on expected effort.

28) For Bid Item A-03b (Base Aggregate), there is a discrepancy between the Bid Form and the Measurement and Payment Specifications. Please clarify the basis of payment for this bid item.

Answer: Use the bid form tonnage. Specs will be revised.

29) Section 31 23 16-1.4 of the Specifications state that “wood waste mixed with sediment and soil materials consists of chips, fiber, pulp, or sawdust mixed with native silt and sand. The material is very soft and exhibits a pungent organic odor.” Based on the anticipated odors, are there any specific odor control/mitigation requirements for the project?

Answer: No.

30) Section 01 35 29-3.4 of the Specifications states that “the Contractor shall have a minimum staff of two personnel onsite whenever the Work is being performed.” Please confirm that this applies to nighttime operations of the water treatment system.

Answer: Yes, this applies to all times Work is being performed onsite.

31) Section 01 35 29-1.7, A of the Specifications states that the “Contractor shall delineate any work area for exclusion using the appropriate approaches to include but not limited to physical barriers such as orange construction fencing, and temporary panel fencing, and/or road barriers.” Are there specific areas where orange construction fence will not be sufficient and temporary panel fencing must be used?

Answer: Fencing type should be appropriate to safely provide exclusion specific to Contractor’s activities and Site conditions associated with the Work.

32) Section 01 57 19-1.6, B of the Specifications states that “the Contractor shall enclose all internal combustion engines used for the Work and equip engines with mufflers of a type recommended by the manufacturer to reduce noise emissions.” Does this mean that all pumps

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) used for water management, treatment, and discharge must be critically silenced within sound-attenuating enclosures?

Answer: No “critical sound attenuating” measures are anticipated as the site is not near residential neighborhoods. Equipment should be muffled according to the manufacturer's recommendations.

33) Will the Contractor be responsible for completing SWPPP inspections during the off-season if the Site is secured as prescribed in the Drawings and Specifications?

Answer: Bid Item 005 in Measurement and Payment states that the Contractor shall “conduct monthly site inspections during the two time periods between each active CS to identify any areas where winterization measures require maintenance and or repair”

34) Section 02 21 00-1.1 of the Specifications states that “the Contractor shall perform all layout and surveying as needed to perform the Work and develop as-built surveys of the Work both pre-construction, post excavation, and post backfill.” A pre-construction survey is not listed under Section 02 21 00-2.1 of the Specifications. Please confirm that a licensed surveyor must perform a full pre-construction survey of the Site conditions.

Answer: The entry says, “layout and surveying” and is directing the Contractor to provide general surveying services for the project. Please refer to Section 02 21 00-3.5 Survey Schedule for the required surveys. The Contractor is also required to provide the surveying they deem necessary to be required to control work and monitor progress.

35) Section 02 21 00-1.5,A of the Specifications states that the horizontal datum is to be Oregon State Plane North Zone, North American Datum 1983 (NAD83) in US Survey Feet. Drawing G-3, Note 2 states the horizontal coordinate system is North American Datum of 1983 (NAD83) Units of International Feet. The CAD files provided on 11/7/2025 are all in International Feet, and file BID SET ONLY 11.4.25 xr_Basemap [Composite] also has the coordinate system listed as NAD83 Oregon State Planes (Polyconic), North Zone, Intn’l Foot.

Please confirm that US Survey Foot is the unit to be used during construction. If this is confirmed, please provide a conversion for the CAD files from International into US Survey Feet.

Answer: US Survey Foot is NOT the unit to be used. The project CAD work is in International Feet. The specs will be revised to correctly reflect this.

36) Section 02 21 00-3.4,A of the Specifications states that “In areas of planned haul road construction in Subareas 1 and 2 as-built surveys of excavated conditions showing that required excavation elevations have been achieved shall be performed by Contractor and approved by Engineer prior to placement of haul road construction materials within excavated area.” Please confirm that the Engineer’s approval will be issued in real time if the specified instrumented excavation equipment is used.

Answer: Engineer will review Contractor’s verification surveys in real time to approve the as-built surveys of excavated conditions.

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

37) Section 4.2.6 of the IRAM Investigation Report addresses the results of specific admixture testing. Can the Engineer provide a table showing the baseline geotechnical properties (i.e., bulk unit weight, moisture content, etc.) of the sediment samples as well as the results of each admixture tested? Can the Engineer provide pictures of the admixture testing activities?

Answer: See the IRAM Investigation Report (GSI, 1/27/2025) and the Geotechnical Evaluation (Haley & Aldrich, 10/17/2025) available with the other E-2 documents:

https://ordeq.org/ECSI0091ITB

38) Section 02 61 00-3.4 of the Specifications indicates that the “Contractor shall load fully lined bed trucks for transport to the approved disposal facility. The Contractor shall not allow sediment to leak or splash from the truck. Truck and trailer dumps shall be fully lined with minimum 6-millimeter-thick black polyethylene sheeting liners.” Is the intent of the liners to mitigate spillage or support dumping at the landfill (i.e, allow the material to slide out of the truck bed)? If the intent is to mitigate spillage, can gasketed gates be used in lieu of bed liners?

Answer: Trucks shall be lined as specified.

39) Section 02 61 00-3.4,H of the Specifications states “Due to the light unit weight of some material and, in order to avoid material splashing out of truck bed, the Contractor may be required to load highway trucks with larger freeboard than may be typical.” What is the anticipated unit weight of the waste material?

Answer: These values can be found in the Geotechnical Evaluation (Haley & Aldrich, 10/17/2025) available with the other E-2 documents: https://ordeq.org/ECSI0091ITB

40) Please provide the dimension ratio (DR) for the 4-inch HDPE conveyance pipe.

Answer: The DR of conveyance pipe should be appropriate to the Contractors’ conveyance system requirements.

41) Will the Contractor be responsible for providing a stamped set of drawings for the water treatment system?

Answer: Contractor will need to provide the water treatment system as a submittal and part of the RAWP. A stamped set of drawings is not required.

42) Section 02 72 00-3.3,A of the Specifications require the Contractor to provide “inline sensors to confirm that treated water passes discharge criteria (AWQC).” Please provide the specific discharge criteria for this project. How will compliance be established prior to discharge? Are test batches required prior to the first discharge? Are there any monthly compliance sampling and analysis requirements after the initial discharge?

1. Answer: Discharge criteria are provided in the specifications:

• Turbidity – Less than 5 Nephelometric Turbidity Units (NTUs) above background in Scappoose Bay based on current turbidity monitoring in Scappoose Bay

• Chemistry – DEQ Ambient Water Quality Criteria (AWQC). Results will be compared with water quality criteria from Oregon Administrative Rule (OAR) https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0 https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

340-041-80330 including referenced Tables 30, 31, and 40 for relevant site COCs which include:

o Metals (arsenic, mercury, lead, and zinc) compared to Table 30 chronic freshwater values.

o Dioxins/furans (2,3,7,8-TCDD) compared to Table 31 chronic freshwater value.

Due to extended laboratory turnaround times for dioxins/furans, results will be evaluated retrospectively for potential treatment modifications, but will not limit initial discharge.

o PAH’s compared to Table 40 values (water + organism).

o Conventional parameters listed in the specifications for comparison to narrative criteria provided in OAR 340-041-80330.

2. Batching will be necessary at the start of the treatment as necessary to demonstrate compliance with AWQCs. Daily testing for the first three days followed by a reduced monthly discharge compliance sampling schedule is anticipated assuming that discharge criteria are met and reasonable correlation with conventional parameters (i.e. TSS and turbidity) can be established.

43) Section 31 11 00-1.1, C states that “the Contractor shall remove all vegetation that is suitable for bird nesting prior to the start of the primary nesting season beginning on April 15.” Does this include the vegetation located below the Ordinary High-Water Level (OWH)? If so, can this clearing and removal work be conducted outside of the identified IWWPs?

Answer: Yes, this includes vegetation below OHW. Removal of this vegetation will need to occur outside the IWWP and prior to April 15.

44) Section 31 11 00-1.1,D states that “if vegetation clearing and removal work cannot be completed prior to the primary nesting season beginning on April 15, a site-specific survey for nesting birds must be performed by a qualified biologist no more than 7 days prior to all vegetation disturbing activities.” If the site-specific survey is necessary due to the prescribed IWWPs, will the Owner provide this site-specific survey?

Answer: Vegetation clearing can be performed outside of the prescribed IWWPs.

45) Section 31 23 16-1.4,B of the Specifications states that “the Contractor shall excavate sediment and soil within the haul road footprints to the elevations shown on the Contract Drawings (or deeper as directed by the Engineer) prior to constructing road sections per the Contract Drawings and as described in Part 3 of this specification section.” For Bid Item 029 (Construction IRAM Area Haul Roads and Blisters), the basis of payment by the linear foot. If additional aggregate is required to construct the haul roads because additional sediment is removed at the direction of the Engineer, how will the Contractor be compensated for the procurement and placement of the additional aggregate?

Answer: Under Section D Changes in the Work of the General Conditions, it is mutually agreed that changes in Plans, quantities, or details of construction are inherent in the nature of construction and may be necessary or desirable during the course of

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) construction. Within the general scope of this Contract, the Owner's Authorized Representative may at any time, without notice to the sureties and without impairing the Contract, require changes consistent with this Section D.1. All Change Order Work shall be executed under the conditions of the Contract Documents. Such changes may include, but are not limited to:

(a) Modification of specifications and design.

(b) Increases or decreases in quantities.

(c) Increases or decreases to the amount of Work.

(d) Addition or elimination of any Work item.

(e) Change in the duration of the project.

(f) Acceleration or delay in performance of Work.

(g) Deductive changes.

46) Section 31 23 16-3.1,B of the Specifications state that the “maximum track load of a stationary excavator [shall be] 1,940 pounds per square foot (psf). The maximum track load of a stationary excavator while digging [shall be] 2,100 psf.” Please confirm that this requirement can be waived if the Contractor can demonstrate that the excavator loads are adequately distributed using supplementary BMPs.

Answer: No

47) Please clarify the difference between the “Daily RML (6-inch layer)” called for in Section 03

12 16-3.5,F of the Specifications and the “sacrificial cover for excavations” called for in Section 31 05 16-2.7,B of the Specifications.

Answer: Sacrificial cover is daily cover material to stabilize open excavations that would be removed to continue work the following shift.

48) Please clarify the approved anchoring method for the Coir Mat called for in Section 32 900 00-

3.3,A. If wooden stakes are required, please provide the acceptable dimensions and spacing for the stakes.

Answer: Wooden stakes are required. Wood stakes shall be constructed of new, sound, unused and untreated, 2x4 lumber from two and one-half foot (2 ½’) long sections, each cut diagonally across the 4-inch face to make two stakes of the correct length. Use a minimum of two stakes per square yard in staggered rows.

49) What is the minimum acceptable overlap for adjacent rolls of the Coir Mat?

Answer: Adjacent rolls should be overlapped a minimum of 8 inches. Where overlaps occur mid slope, place the mat such that the upslope layer overlaps the downslope layer 1-foot.

50) Section 31 23 16-3.1,A of the Specifications requires the Contractor to “provide excavators that are less than 5 years old (Model year 2021 or newer) and have less than 5,000 operating

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) hours.” If an excavator is older than five years but has fewer than 5,000 hours, is in good working condition, is plumbed for the required environmental clamshell bucket, and is instrumented with the required GPS equipment, can it be used at the Site?

Answer: Equipment must meet the specifications.

51) I had a question regarding the treated water discharge point. I was not able to find in the plans the exact location for it. Can you clarify where the discharge point is?

Answer: The discharge point is under the dock towards the river end of the dock.

Drawings will be revised to show discharge point location.

52) Specifications read - "Proof of contractors or its subcontractors active asbestos abatement license under Oregon revised statute ("ORS") 468A.720 is required to be submitted to DEQ before the notice to proceed is issued. Project documents go on to say “hazardous waste is not anticipated to be within the excavation area. If such waste is encountered, the contractor shall immediately notify the engineer to determine the course of action to be taken. Contractor shall continue to work outside of area where believed hazardous waste was encountered while situation is evaluated by engineer and DEQ.” Additionally, materials that were tested in the upland area are not described as being asbestos contaminated materials.

a. If hazardous waste is not expected to be encountered, please consider changing the asbestos abatement licensing requirement to be performed by a licensed contractor/subcontractor only if encountered and not as a requirement for notice to proceed.

Answer: Asbestos containing material (ACM) was found. ACM with asbestos >1% included tar paper, pipe wrapping, and valve paint. Most ACM occurs along the banks between the uplands and the IRAM Area. Sampling is planned to delineate extent of ACM in soil.

53) The current design is very prescriptive and dictates all means, methods and even equipment that can be used to complete the project. Contractors have the experience and specialized equipment to provide a more cost effective approach to achieve the same outcome and could save the state money, reduce schedule, and reduce risk. Will the state accept value engineering options and, if so, can an alternative bid be presented?

54) 02 61 00 part 3 states that contractor may add solidifying agents (ZapZorb or equivalent) to excavated sediment as required to meet the paint filter test. Were any treatability studies performed to evaluate the use of ZapZorb or other materials, such as Portland cement or fly ash?

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

Answer: Yes. See IRAM Investigation (GSI, 1/27/2025) Section 4.2.6 Admixture Testing Results. The IRAM Investigation Report is available with the other E-2 documents at https://ordeq.org/ECSI0091ITB

a. To provide an accurate quote, contractors will need to know the percentage of material required.

Answer: See IRAM Investigation Section 4.2.6 Admixture Testing Results.

b. Disposal facilities have strength requirements ranging from 1,000 to 1,500 PSF.

ZapZorb absorbs moisture but does not improve strength of the sediment/material.

Portland cement offers both moisture absorption and adds strength. Please list Portland cement as an approved alternative.

Answer: No

55) 02 72 00 Section 2.2.A states “pumps, fittings, discharge hoses, conveyance for dewatering and conveying water from the IRAM area shall be designated to a water type (construction contact or drawdown) and used only for that water type for the entirety of the project.

a. Please consider allowing flushing of the system/lines between water types and allowing the contractor to reduce the number of pumps, hoses, etc. This would drastically reduce costs through reduction in equipment, labor, and materials.

Answer: No, requirement retained.

56) 02 72 00 Section 2.2.E states “Conveyance pipe shall be 4 inch diameter HDPE and may be fused or bolted as necessary to convey water by type to the appropriate destination.”

a. Please confirm that the contractor may determine HDPE pipe size as necessary to most efficiently operate their own systems.

Answer: Contractors may propose alternate pipe sizes appropriate to their system requirements.

57) Amphibious equipment would offer a more efficient and cost effective approach to the project objectives. Please consider eliminating the haul road requirement, exclusion of amphibious equipment, and general prescriptive method being described and allow the contractor to determine the best approach. Allowing contractor proposals describing means and methods to achieve the same outcome could save project owners time, money and reduce risk.

Answer: No. Amphibious equipment was evaluated and eliminated as a viable option.

Contractors must follow the technical specifications and drawings provided.

58) The specification has excavator requirements that, among other things, states that excavators shall not be more than 5 years old and have less than 5,000 operating hours. Please strike this requirement. Equipment and schedule are at contractors’ risk. The equipment used should not https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) be dictated by other parties, especially considering the substantial liquidated damages that are in place.

Answer: No, requirement retained.

59) 01 57 19 Section C.8 reads “all work will be done using a clamshell bucket during periods of low tide to the extent practicable. Water levels may require some excavation work to be performed during inundated conditions. Contractor shall provide BMPs as necessary to reduce turbidity during tidal inundation.

a. Please clarify that work can take place regardless of the tide and by use of contractors choice of equipment assuming deployment of BMPs as necessary.

Answer: Work must be performed with required environmental clamshell bucket and during periods of low tide to the extent practicable.

60) There is information for bulk water and dredge elutriate test analytical results for water in attachment E-1 IRAM Final Design Report, but is sediment sample analysis available? The information will be needed by disposal facilities to provide accurate pricing.

Answer: See the IRAM Investigation Report (GSI, 1/27/2025) and Data Gaps Investigation Report (GSI, 6/29/2023) available with the other E-2 documents at https://ordeq.org/ECSI0091ITB

61) 31 23 16 Section C. “Engineers Interaction with Excavator Operator and Excavation Foreman”

– Please further explain the nature of the Engineers interactions with the excavator operator including: What equipment they will be using to determine whether excavator operators are meeting objectives. Actions that would cause, at the sole discretion of the engineer, excavator operators to need to be immediately replaced. Engineer proximity to excavator operators, etc.

Furthermore, the section would allow the Engineer to dictate means, methods and even production. If the Engineer will be dictating any of the three, please provide production rates at which the contractor can assume the Engineer will direct our employees to work at.

a. 31 23 16 section C, in its entirety, makes assigning production rates, maintaining efficiency, and ensuring a safe workplace for contractor employees nearly impossible. Please consider striking this portion of the specifications as it does not guarantee a better project outcome for the owner. Project objectives can and will be achieved without the extra expenditure and are monitored by other means, such as third party survey, construction verification as described in 01 11 00 section 1.8, and progress meetings as described in 01 11 00 section 1.9.

Answer: Contractors must follow the technical specification.

62) In the ITB for the project the qualification section states the following:

https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7Cff14897c4fe74cf3c7ba08de1e4910f7%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638981496635402045%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UFWgH6XK7G%2Bv84giGe4%2BArVRjwWsFpuXB4Y08l%2Bm8NE%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

Bidder shall provide the information below for 3 different projects completed within the last 10 years that demonstrate Bidder’s experience with projects of similar size, scope, and complexity to the Project that is the subject of this ITB. To this end, two of the three projects must be sediment remediation projects with a construction value of over $10 million and required removal of at least 50,000 cubic yards of contaminated soil/sediment, or otherwise similar to the complexity of the Project to demonstrate that Bidder has completed contracts of a similar nature with a satisfactory record of performance.

Furthermore, on the next page it has a project description check boxes of these requirements as shown below.

• Completed removal of over 50,000 cy of contaminated sediment

• Contract value over $10,000,000

• Work conducted in an intertidal waterway or wetland

• Included wetland restoration requirements

• Required managing water treatment system in conjunction with sediment removal work to achieve numerical water quality criteria for discharge to surface water

• Required dewatering of open excavations using drawdown pumps, conveyance, booster pumps, or similar

• Required managing, dewatering, and stabilizing contaminated sediments using geotubes, presses, sediment basins or other suitable means

• Required installing and maintaining turbidity curtains, silt fences, berms, or other means to effectively isolate the work area We have a clarification question based on these project qualification documents.

1. If the contractor meets a majority of these requirements, but not all on one project, would the contractor still be considered qualified? Example:

a. Project #1 meets 4 out of the 8 bullets in the criteria.

b. Project #2 meets 5 out of the 8 bullets in the criteria.

c. Project #3 meets 3 out of the 8 bullets in the criteria.

d. If the contractor can demonstrate through multiple projects successful completion of similar to the complexity with satisfactory performance, as stated above in underline, would this be acceptable?

Answer: The Record of Satisfactory Performance section of Attachment A Form A-1 in the ITB provides instructions for completing the form including the number of projects required to meet each criterion.

63) Due to the upcoming holiday and the short bid cycle, we are requesting that the bid due date be extended to Monday, December 22, 2025.

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

64) We have a couple of potential restoration and electrical subcontractors that would like to visit the Site. Can you provide the process for allowing these potential subcontractors to make Site visits?

Answer: See I. of the Addendum 1 ITB S-DASOBO-00014831 posted on OregonBuys for adding Optional Site Access to the ITB Section A.5 Site Access.

65) May I get the pre-bid conference sign in sheet for the above project?

Answer: The Mandatory Pre-Bid Sign In Sheet and the Mandatory Pre-Bid DEQ and DAS Presentations are now loaded and available with the other E-2 documents: https://ordeq.org/ECSI0091ITB. Also, see II. and the “Attachment 1- Addendum 1, Attachment E-2 Additional Reference Document” attached to the Addendum 1 ITB S-DASOBO-00014831 posted on OregonBuys.

66) Do you know when the pre-bid attendance list will be posted?

Answer: See answer to the question# 65.

67) I was just checking to see if an Addendum was coming out to follow up with the Pre-bid from last week. I’ve been checking OregonBuys but though I might be missing it.

Answer: See II. and the “Attachment 1-Addendum 1, Attachment E-2 Additional Reference Document” attached to the Addendum 1 ITB S-DASOBO-00014831 posted on OregonBuys.

68) Is there pre bid meeting attendance list available? We are a wetland restoration contractor looking to discuss opportunities with the interested primes. Thank you.

69) Can you please share the list of bidding general contractors? I do not see the plan holders list on OregonBuys.

70) There are no electrical specifications in the tech specs dated 10/17/25 . Can we assume the associated electrical installations for the water treatment system are to abide by NEC 2023 applicable codes, with no additional requirements?

Answer: Contractor to meet all local and relevant fire, plumbing, electrical, and building codes.

71) When the excavation boundary provided in Drawing C-47 and the overdredge allowance (.25 feet) are used, the cut volume within Subarea 1 is approximately 36,000 cubic yards. The contract quantity for Bid Item 028 IRAM Excavation, Loading, and Hauling to SPA is 52,000 cubic yards. There appears to be a discrepancy between these values. Was a factor used for Bid Item 028 to produce the 52,000 cubic yards contained in the Bid Form? Or does the volume https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fordeq.org%2FECSI0091ITB&data=05%7C02%7CKatie.DAUGHERTY%40deq.oregon.gov%7C6cdf4de0d5174326e48f08de27834fbd%7Caa3f6932fa7c47b4a0cea598cad161cf%7C0%7C0%7C638991642080702393%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=UT661DQHwRLXFuxP5NwM9I1vq4g8%2BZY8cKM3z6NfTy8%3D&reserved=0

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

(52,000 cubic yards) correspond to the expanded area shown in the ISO EB vs REQUIRED WITH SLOPES.1 Volume Surface?

Answer: Excavation volume was estimated by including the following sources:

• Lowland sediment, soil, and wood waste: Calculated using the existing grade survey and maximum allowable overdepth surface.

• Sacrificial waste materials that will need to be removed as part of remedial excavation process and include estimated volumes for the following:

o Crushed rock for work area isolation increment berms o Sacrificial RML cover

• Subarea 2 ramp footprints: Grubbing and minimal soil removal required for construction of the two ramps into the lowland IRAM Area.

72) A similar issue is encountered for the SW Quadrant. The volume for Bid Item A-12a is 8,800 cubic yards. The largest verified quantity is 4,850 cubic yards. Please address this potential discrepancy.

Answer: Like question 71, volume includes removal of increment berms and sacrificial RML as part of the remedial excavation process.

73) The 2025-02-03 Required Excavation + .25 OD CAD file provides a design file that depicts approximately 2,000 cubic yards of cut within Subarea 2. Will there be any excavation within Subarea 2?

Answer: “2025-02-03 Required Excavation +.25 OD.dwg” is not part of the bid documents. It is a relic file that was incidentally included with the additional transmit of sheets per bidder's request.

74) If the quantity for Bid Item 028 (52,000 cubic yards) is accurate and no factor was used to increase the neat cut volume, should the boundary provided in Drawing C-47 be expanded or moved westward to correspond to the ISO EB vs REQUIRED WITH SLOPES.1 Volume Surface?

Answer: See response to Question 71.

75) Can we get a copy of the mandatory pre-bid meeting sign in sheet please?

76) We are a subcontractor that specializes in the supply and installation of geosynthetics. We are looking forward to submitting a proposal for the liner scope of the referenced project. Could you please share with us the plan holders' list?

77) I am a supplier of irrigation materials and one of my customers is requesting a quote for irrigation material. It is unclear what is to be irrigated. Could you provide some clarity so I know what to have our design team irrigate?

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

Answer: Specification Section 32 90 00 – Restoration and Planting, Subparts 1.4 and 3.6 detail the requirements for temporary irrigation. From Subpart 3.6: “A temporary, aboveground irrigation system that provides complete coverage of Subarea 2 and the portion of Subarea 1 that is not regularly inundated (above elevation 8.5 feet NAVD88)...”

Sheets C-83 and C-84 of the Contract Drawings show the plant material palettes and plant material spacing.

78) Detail A in Drawing C-33 shows the profile for the ramp at the Turning Pad Area. In this detail, does the solid black line represent the top of subbase material or top of base material?

Answer: The ramp should be built from Imported Structural Fill or Stabilization Material up to the Turning Pad and Ramp Area boundary per the typical haul road cross section detail. In the turning pad area, the solid black line represents the finish grade with the section as called out in Detail C on Sheet C-40.

79) Note 7 on Drawing C-45 states “Once all sediment removal and initial backfill placement is

Subarea 1 is complete for CS1, complete grading, habitat material placement, and planned restoration work.” Note 11 on Drawing C-45 states “at Contractor’s discretion (in Construction Season 2), begin placement of any remaining restoration fill materials and planting in CS1 Area. For liquidated damages, please clarify what constitutes interim completion for Construction Season 1. Is it the completion of the excavation and initial backfill placement?

Answer: Yes it is the completion of excavation and backfill below OHW.

80) Section A.8 in the ITB document states “If Contractor fails to complete the Work required to be completed in Construction Season 1 by the Construction Season 1 interim completion date, and an in-water work period variance is sought and granted by the appropriate permitting agency(ies), Contractor shall pay to DEQ, not as a penalty, but as liquidated damages, $5,400 per calendar day for each day Work is performed beyond the CS1 Interim completion date.

Assessment of liquidated damages will stop when CS1 Work is complete. If in-water work period variance is sought and not granted, the Contractor shall pay to DEQ, not as a penalty, but as liquidated damages, a single assessment of $2,000.” Please explain what an “in-water work period variance” is, how it would be sought, and which agenc(ies) would be responsible for granting it.

Answer: An In-Water Work Period (IWWP) variance is formal authorization from the permitting agencies that extends the previously stated IWWP. It is sought by the permit holder (DEQ) from the USACE and involves additional coordination with other applicable resource agencies, such as the NMFS. The contractor would be responsible to provide DEQ all the necessary information needed to request an IWWP variance including but not limited to: an explanation of the proposed changes to the project, rationale regarding why an extension is needed, timing and duration of project activities, alternatives considered prior to requesting an extension, best management practices or conservation measures proposed, forecasted water levels, contingency plans, project

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160) constraints, and a description of impacts. A variance may only be requested after the contractor has demonstrated to DEQ that all other means and methods to perform the work within the IWWP have been exhausted.

81) The ITB document does not address consequential damages. Please confirm that the only applicable damages are those addressed in Section A.8 of the ITB document.

Answer: Damages are addressed in Section A.8 of the ITB Document, Section 4 of the Sample Public Improvement Agreement (Attachment D-1 of the ITB Document), SGC-12 of the Supplemental General Conditions (Attachment D-4 of the ITB Document), and Section G.1.2. and G.1.3 of the General Conditions (Attachment D-4 of the ITB Document).

82) Drawing C-87 contains a note that reads “The Top 1 Ft, or as directed by the Engineer, of rock at the truck turn around pad and ramp to the SPA is removed and disposed of.” Will this rock be replaced at the beginning of Construction Season 2? If so, how will the Contractor be compensated for this?

Answer: Replacing the top foot at the turn-around and ramp is included under Alternative Item A-09 for IRAM haul road repairs. See Question 45 for out of scope conditions.

83) There is a call out on Drawing C-33 indicating “Contractor to cut utility pole to existing grade and remove overhead line prior to subareas 1 and 2 excavation.” Is the overhead line still energized?

Answer: The property owner, Upland Data Center, has stated that there is no power to that line. Contractor is to verify for themselves that the line is deenergized prior to performing the work.

84) There do not seem to be any references for in-situ density testing. Please confirm that density testing will not be required for any aspects of the project, including the Uplands scope.

Answer: Insitu density testing will not be required for the project as presented; however, if replacement of permanent asphalt is required, testing requirements per Oregon Standard Specifications shall be followed.

85) Drawing C-75 depicts the dimensions for the intertidal channels for the final restoration. Is RML to be placed within this channel? And if so, should the channel be dug deeper to have final dimensions of 6’x2’?

Answer: The bottom of the channel should have RML placed on it post excavation. The channel should be dug to 6’x2’ and a foot of RML added to both the surrounding grade and the bottom of the channel.

ITB: S-10700-00014831

Reponses to Questions as of December 11, 2025 (FINAL Answers to Questions# 1-160)

86) Drawing C-68 provides the detail for the RPB and Mounds. The materials shown for the construction of these features are not detailed here. Please confirm that these features will be constructed using stabilization material and will be overlaid with topsoil.

Answer: Drawing C-68…