Attachment A Scope of Work and Technical Specifications.docx

SCOPE OF WORK

The purpose of the work specified herein is to provide seismic cone penetration testing with pore water pressure measurement (SCPTu) as part of a geotechnical investigation at a site known to be underlain by diatomaceous soils. This investigation is being performed in support of a pile static load test.

All necessary equipment, machinery, tools, lighting, supplies, materials, fuel, mobilization/demobilization, water, water delivery, setup, site preparation, safety equipment, skilled personnel, and incidentals to perform the specified work shall be provided by the Contractor. Due to confined workspace at the location, traffic control will be provided by the Contractor. This scope of work will occur in parallel with Pile Driving and Pile Testing and potentially Drilling (separate contracts). Contractor will be expected to work with ODOT to schedule pile driving and pile testing so that CPT work occurs before and after pile driving work (pile driving is a separate contract).

The scope of work will include advancing SCPTu soundings at the location indicated in Table 1 below and shown in Figure 1 both before and after Pile Driving and Pile Testing (separate contract). As site conditions allow, testing will be conducted to the depth indicated in Table 1 for each sounding (to be determined in conjunction with the ODOT Engineer).

Table 1. Location and approximate depth of exploration.

A truck-mounted cone penetration testing (CPT) rig will be able to access the site. We expect that at least two and up to six SCPTu soundings will be performed. Expected site conditions include fill and colluvium (potentially with large cobbles) underlain by diatomaceous silts (from very soft to very stiff) interbedded with volcanic ash, organics, and sand lenses. Stiff surficial materials may require some amount of pre- drilling.

STATEMENT OF WORK

ODOT Project Manager: Kira Glover-Cutter. Oregon Department of Transportation, 555 13th Street NE, Salem, OR 97301. kira.m.glover-cutter@odot.oregon.gov.

ODOT Project Geotechnical Engineer: Tom Grummon. 4040 Fairview Industrial Drive SE, Salem, OR 97302. tom.grummon@odot.oregon.gov. 541-213-1980.

OSU Project Personnel and Research Project Lead: Matt Evans. Professor. School of Civil and Construction Engineering, Oregon State University, 336 Owen Hall, Corvallis, OR 97331. matt.evans@oregonstate.edu. Office: 541-737-8535; Cell: 541-745-8863.

PSU Project Personnel: Diane Moug. Assistant Professor. Civil and Environmental Engineering Department, Portland State University, Engineering Building 202N, Portland, OR 97201. dmoug@pdx.edu. Office: 503-725-4283 Project Dates Work shall not be initiated prior to April, 2025, and shall be completed by November 15, 2025. As this SOW supports a university research partnership, the date selected for project start must be negotiated with ODOT to ensure each party is present on-site during project work. ODOT will work with the Contractor so that the project start date follows or coincides with ODOT’s separate and independent Pile Driving and Pile Testing work dates. No work will be performed on holidays. Weekend work may be scheduled to avoid unnecessary demobilization/remobilization expenses. Once mobilized to the site location CPT testing should no longer than 14 days.

Utility Search This Project is located within the Oregon Utility Notification Center area which is a utilities notification system for notifying utility owners about work being performed in the vicinity of their facilities. The notification system telephone number is 811 (or use the old number which is 1-800-332-2344). While there are no anticipated conflicts with the utilities listed below, the contractor shall contact the following:

1) CenturyLink, 2980 Crosby Avenue, Klamath Falls, OR 97603: The Contractor shall notify, in writing, CenturyLink, with a copy to the Engineer, at least 14 Calendar Days before beginning Work on the Project.

2) Pacific Power, 1950 Mallard Lane, Klamath Falls, OR 97601: Energized power lines overhang portions of the Work with a minimum vertical clearance of 18 feet. The Contractor shall maintain at least 10 feet of safety clearance. Exceptions require written approval from Pacific Power and may require an On-Site safety watcher, at no cost to the Contractor. The Contractor shall provide the ODOT Engineer a copy of the written approval of exception before beginning work.

3) TransCanada Gas Transmission NW; 201 West North River Road, Suite 505, Spokane, WA 99201: TransCanada Gas Transmission NW operates a 42-inch and a 36-inch diameter high pressure gas transmission pipelines near the Project limits. In the immediate area of the high-pressure gas lines, when moving any equipment, excavating, driving piles, or other road construction activities, the Contractor shall increase the Reasonable Accuracy Zone from 24 inches, as defined in OAR 952-001-010, to 10 feet. Exceptions require written approval from the TransCanada Gas Transmission NW and may require an On-Site safety watcher, at no cost to the Contractor. The Contractor shall provide the ODOT Engineer a copy of the written approval of the exception before beginning work. The Contractor shall notify, in writing, TransCanada Gas Transmission NW, with a copy to the ODOT Engineer, at least 7 Calendar Days before beginning excavation, installing guardrail posts, installing signs or other road construction activities within 10 feet of the 42- inch or 36-inch diameter high pressure gas transmission pipelines. When operating equipment directly above the high-pressure gas pipeline, the Contractor shall keep equipment on the paved surfaces only. The Contractor shall notify, in writing, TransCanada Gas Transmission NW, with a copy to the ODOT Engineer, at least 14 Calendar Days before beginning Work on the Project. In the event of an emergency, the Contractor shall call TransCanada Gas Transmission NW 1-800-447-8066 in addition to calls required by the Utilities notification system.

Contractor shall call for and have underground utilities located and marked before any work at the site begins. Some overhead utilities may be present. The Contractor shall provide the utility call-in ticket number to ODOT before work begins. The Contractor shall not perform ground penetration work within three feet of any marked/identified utility.

Seismic Cone Penetration Sounding with Pore water Pressure Dissipation (SCPTu) Two separate timepoints for testing are expected and include before and after Pile Driving and pile testing. For each of these timepoints, at least two and up to six soundings will be advanced at the project site (see Figure 2 for a vicinity map and Figure 3 for potential equipment footprint), as described below and as directed by ODOT. The total penetration footage is estimated at approximately 180-300 feet for each time point. Subsurface materials at the site are anticipated to be a mixture of sand, silt, and gravel fill material (≈3-6 ft.) over medium dense lacustrine silt, sand, and gravel (≈4-10 ft. thick) with possible fat clay seams underlain by a thick deposit of diatomaceous silt (from ≈13 ft. bgs to BOH) containing a dense sand lens (≈58-62 ft. bgs).

For each time point, the Contractor should be prepared for 60 ft. of pre-drilling. On paved surfaces the top 18 inches of the penetration shall be sealed with cement grout or concrete. Soundings shall be performed and abandoned in accordance with the Oregon Water Resources Department (OWRD) rules and regulations. All CPT data reports shall be filled out using the assigned OSU/PSU sounding number, signed by the licensed operator, and submitted to the OWRD with a copy submitted to the OSU Project Personnel and Research Project Lead.

Downhole shear wave velocity measurements shall be performed during testing. The contractor will provide a seismic source for generating waves at the ground surface and an instrumented cone containing the receiver(s) necessary (e.g., geophone(s)) to detect shear wave arrival times.

Pore water pressure dissipation tests shall be performed as directed by ODOT. Due to anticipated high excess pore water pressure conditions, it may be necessary in some instances to advance the cone at a rate that is less than the standard 2 cm/s, at the discretion of the ODOT. In the case of particularly stiff or rocky deposits overlaying or interbedded with the diatomaceous materials, pre-drilling may be necessary.

Special Note: In previous site investigations involving diatomaceous soils, observed pore water pressures have ranged from under 100 psi to over 700 psi. It is the Contractor’s responsibility to provide a cone penetrometer with pore pressure transducer(s) capable of measuring up to 1500 psi at the necessary resolution (typ. ≈0.001 psi).

Access to Project Site Access to the test site will be via paved road or otherwise improved surface, and work will occur within ODOT right of way including ODOT’s permanent easement area. Figure 2 shows the approximate test location at the project site in more detail.

Water Sources and Delivery Water delivery access will be from the available locations as identified and managed by the Contractor. Sufficiently sized and lengths of water delivery pipe/hose/pumps shall be provided by the Contractor as necessary (see Section 2.10 of the Technical Specifications).

Anticipated Subsurface Conditions The subsurface materials anticipated to be encountered are native soils consisting of sands, gravels, silts, and clays, possibly with occasional cobbles or boulders. Upper units will likely consist primarily of colluvium and stream alluvium with deeper units being comprised largely of very soft to hard diatomaceous soils. Shallow groundwater may be present in some or all soundings.

TECHNICAL SPECIFICATIONS

1.0 SCHEDULE

Work shall not be initiated prior to April, 2025, and shall be completed by November 15, 2025. The date selected for project start must be negotiated with ODOT so that all parties are present CPT testing. ODOT will work with the Contractor so that this project start date follows or coincides with ODOT’s separate and independent Pile Driving and Drilling work dates. For both time points (before and after Pile Driving), the start date will be the date Contractor mobilizes equipment and personnel to the work site. Once Contractor mobilizes equipment and personnel to a given work site, work shall progress continuously until all work at a given site is completed, no longer than 14 days, excluding holidays, subject to the requirements of Section 2.9 of these specifications.

2.0 MINIMUM REQUIREMENTS FOR ALL TESTING OPERATIONS

2.1 Control of Work: The Contractor shall have an on-site responsible supervisor on the job at all times while work is in progress, capable of and with authority to make job site decisions as an official Contractor’s representative.

This work shall consist of in-situ testing in soil or rock. Soundings shall be advanced at the locations and to the depths directed by the ODOT representative for two time points (before and after pile driving). Adequate testing equipment and materials should be maintained on location to complete the soundings to the estimated depths. All advancement, testing, and abandonment of subsurface penetrations shall be in accordance with the following test methods, standards, and legal requirements:

· Oregon Standard Specifications for Construction (OSSC)

· ASTM D5778–12, “Standard Test Method for Electronic Friction Cone and Piezocone Penetration Testing of Soils”

· ASTM D6067/D6067M–17, “Standard Practice for Using the Electronic Piezocone Penetrometer Tests for Environmental Site Characterization and Estimation of Hydraulic Conductivity”

· Administrative Rules, Water Resources Department, Chapter 690, Division 240, “Construction, Maintenance and Abandonment of Monitoring Wells, Geotechnical Holes, and Other Holes in Oregon”

· Federal and Oregon Occupational Safety and Health Administration (OSHA)

· Any and all local or state noise requirements, forestry permits, and permits issued

2.2 Condition of Equipment and Tools: All equipment and tools shall have been maintained in good operating condition prior to being mobilized to the site and shall continue to be maintained in good condition for the duration of the project. Frequent or extended breakdowns shall be cause for rejection of equipment and/or rigs and replacement at no cost to the Agency. The contractor shall secure all equipment and materials when away from the project site.

2.3 Property Damage: Any water and cuttings discharged from the cone penetrations shall be disposed of in a manner consistent with environmental regulations and approved by the ODOT representative. Property damage and contamination of waterways shall not be permitted. When track mounted CPT rigs are operated on paved surfaces, steps to protect the paved surfaces from any damage shall be used during unloading or loading, mobilizing to and from sites or during testing activities. When track or truck mounted CPT rigs are operated on open State or private property, steps to protect against excessive (or at the discretion of the property owner) ground damage, such as ruts and torn sod etc., shall be used during unloading or loading, mobilizing to and from sites or during testing activities. Any damage to State or private property caused by the Contractor shall be repaired within 15 days of such damage by a State- approved method. Measures shall be taken to prevent water or cuttings discharge to any local drainages, streams or wetland areas.

2.4 Personnel Requirements: The Contractor shall furnish a crew consisting of experienced CPT operators of sufficient number to perform the work in a safe and efficient manner, even in the presence of reasonably anticipatable but unplanned complexities. ODOT shall have the authority to suspend work and require the replacement of any Contractor's personnel not exhibiting adequate capability or reasonable safety and responsibility in their job performance. Such replacements shall be made prior to resuming work and within 48 hours after the ODOT representative provides notification to the Contractor. Section 5.12 (Standby) shall not be invoked while waiting for replacement personnel.

2.5 Safety: Safety is of primary concern on this project, for the traveling public, Contractor's crew, and State employees. In the event ODOT determines there are concerns regarding safety, the ODOT representative shall have the authority to suspend work until such time as those concerns are resolved to the satisfaction of the State. The Contractor shall take every precaution necessary to ensure the safety of all parties and the protection of all property associated with this project. The Contractor shall complete daily tailgate meetings to discuss and document a review of the previous day’s safety concerns or hazards and a review of upcoming tasks and actions that will be taken to properly manage safety risks for the current day’s tasks. This tailgate meeting will require the presence of the ODOT/OSU/PSU representatives. ODOT will review and sign the tailgate meeting notes when complete. All persons on the job site shall wear approved hard hats at all times and ANSI Class 3 reflective safety vests when on ODOT Right of Way or when on or adjacent to any other City, County, or private roadways, multi-use paths, or parking lots. During operations, hearing protection, eye protection, and gloves (when deemed necessary) shall be worn by all personnel. Section 5.6 (Standby) shall not be invoked during suspension periods due to failure to adhere to safety standards.

2.6 Equipment: The type of CPT equipment supplied by the Contractor shall be suitable for the terrain and testing required, as described in the Scope of Work. Equipment shall have all tools, supplies, and spare parts necessary in sufficient quantities to achieve testing to the specified depths and avoid unnecessary delays. All CPT equipment and methods shall provide optimum measurement quality for all materials and comply with all applicable methods, standards, and State and Federal Regulations.

ODOT shall have the authority to suspend work and require the replacement of, or additional, CPT equipment at the Contractor’s expense if the Contractor cannot attain the specified or directed depth or undergoes unnecessary delays brought about by equipment shortages or inadequacies. Section 5.6 (Standby) shall not be invoked during suspension periods due to equipment shortages or inadequacies, or if the test data collection is not acceptable.

2.7 SCPTu Machines: Shear wave velocity measurements will be performed at intervals of no more than

2.5 ft. to the full depth of the sounding, or as directed by ODOT for the two time points both before and after Pile Driving. The Contractor shall employ a standard 10-cm2 u2-type SCPTu probe as required and accepted by ODOT to advance the soundings to the desired depth. In some locations, predrilling may be required to advance the cone penetrometer into the diatomaceous layer(s). Approximately four pore water pressure dissipation tests will be performed within the diatomaceous materials in each sounding, at depths directed by ODOT.

The Contractor will provide a full text and graphical report and provide the data in one spreadsheet or comma-delimited text file per sounding containing all data. The report shall include the following information and interpretation:

· tip resistance;

· sleeve friction;

· pore pressure; and

· shear wave velocity.

The report shall be submitted to ODOT within 14 days after completion of the last SCPTu sounding and shall include electronic data in ASCII, CSV, or XLSX format in addition to the hard copy documents.

2.8 Investigation Derived Waste (IDW): The Contractor shall collect and dispose of all uncontaminated IDW. All labor, materials, and equipment necessary to handle and dispose of uncontaminated cuttings and fluids is considered incidental to the testing. Collection and disposal of single-use PPE (gloves, earplugs, etc.) shall be the responsibility of the Contractor.

Contaminated soil is not anticipated. If contaminated soil is encountered, the materials shall be segregated from uncontaminated materials whenever possible. ODOT shall determine when contaminated materials are present and shall direct the contractor when to place them in contractor- supplied drums. Each drum shall be labeled with the sounding number and date. The contractor shall transport the filled drums to a nearby ODOT facility, placing the drums as directed by the ODOT Project Manager/Project Geotechnical Engineer. Labor and equipment, other than drums, necessary to transport contaminated materials is considered incidental to testing.

2.9 Days and Hours of Operation: All testing operations shall be limited to daylight hours. Work hour restrictions may be in place for on-road holes if traffic volumes or local conditions during daylight hours dictate. Also, work shall not be conducted on state holidays.

2.10 Water and Water Delivery: The Contractor shall provide water sources for this project as necessary, along with the equipment necessary for proper and efficient delivery and storage of water for the testing activities. A sufficient size and length water delivery pipe/hose/pumps shall be provided by the Contractor to adequately provide water to the CPT rig.

2.11 Erosion and Sediment Control: It shall be the Contractor’s responsibility to control any occurrence of erosion or sediment laden fluids created as a result of the testing operation and prevent any runoff from the site into any roadside ditch or waterway without proper treatment to remove sediments. Where required, all spoils shall be collected, transported off site, and disposed of by the contractor. All erosion control and sediment removal measures taken shall be approved by ODOT and shall be incidental to the testing operation. Contractor shall seed and mulch test sites, access roads and other disturbed areas as directed by ODOT representatives.

2.12 Hazardous Materials: The Contractor shall notify ODOT of any hazardous materials to be used on the job and shall have material safety data sheets (MSDS) for those materials available on site.

2.13 Work Zone Traffic Control: The Contractor shall follow the Oregon Standard Specifications for Construction (OSSC) Part 00200 for Traffic Control. This project expects shoulder closure for up to 1 day. Traffic Control shall be in accordance with the following standards and legal requirements as necessary and appropriate:

2.13.1 Oregon Standard Specifications for Construction (OSSC) Part 0200

2.13.2 Oregon Department of Transportation’s “Sign Policy and Guidelines for the State Highway System”

2.13.3 The Manual on Uniform Traffic Control Devices (MUTCD)

2.13.4 The latest versions of the 1990 Americans with Disabilities Act (ADA), and the Public Right of Way Accessibility Guidelines (PROWAG).

2.13.5 FHWA “Standard Highway Signs” manual

2.13.6 ODOT “Oregon Temporary Traffic Control Handbook for Operations of 3 Days or Less” when directed by the Engineer only for mobile pavement marking operations or surveying work, available on the ODOT Traffic Control Plans Unit Website

2.13.7 ODOT “Oregon Portable Changeable Message Sign Handbook,” available on the ODOT Traffic Control Plans Unit website

2.13.8 ODOT “Traffic Control Plans Design Manual,” available on the ODOT Traffic Control Plans Unit website.

3.0 ENVIRONMENTAL PROTECTION MINIMUM REQUIRED MEASURES

3.1 General: The contractor shall take all reasonable steps required to protect the environment on and around the project site.

3.1.1 Do not discharge contaminated or sediment-laden water, directly into any waters of the State until it has been satisfactorily treated (e.g., by bioswale, filter, settlement pond, pumping to a vegetated upland location, bio-bag, dirt-bag or collected and transported to an approved off site location).

3.1.2 ODOT retains the authority to temporarily halt or modify the Project in case of excessive turbidity or damage to natural resources.

3.1.3 Maintain hazardous material spill containment booms and absorbent materials on-site to facilitate the cleanup of hazardous material spills. Install hazardous material spill containment booms or absorbent materials in instances where there is a potential for release of petroleum or other toxicants.

3.1.4 Do not place any material or waste on any public or private wetland, or in and adjacent to any waterway.

3.1.5 If flooding of the project site is expected to occur within 24 hours, evacuate areas used for staging, access roads, or storage and remove materials, equipment, and fuel.

3.2 Pollution Control Plan: The Contractor shall comply with Oregon State Spill Laws contained in OAR 340, Division 108 and OAR-108.010 and with Federal Laws found in 40 CFR Part 302-Table 302.4.

3.2.1 Prior to the commencement of the CPT testing the Contractor shall provide the ODOT with a Pollution Control Plan that, at minimum states what action the Contractor shall take to prevent, contain or clean up a release of petroleum products or any hazardous material.

3.2.2 The Contractor shall have on site (and provide ODOT with a materials list) absorbent material or a Spill Control Kit capable of containing or cleaning up a release of product from the largest tank or reservoir at the project site, a spill containment and control plan with notification procedures, specific cleanup and disposal instructions for different products. A description of quick response containment and cleanup supplies shall be available on the site, including a supply of sediment control materials (e.g., a silt fence, straw bales, an oil-absorbing, floating boom whenever surface water is present) and the proposed methods for disposal of spilled materials. Contractor personnel shall be trained in the use and application of absorbent materials.

3.2.3 The Contractor shall immediately clean up all spills and notify ODOT representatives.

3.3 Additional Requirements:

3.3.1 ODOT retain the authority to temporarily halt the project activities in case of non-compliance by the Contractor with any of the listed Environmental Protection Requirements above.

4.0 MATERIALS

4.1 Materials Supplied By ODOT: No materials required.

4.2 Materials Supplied by the Contractor: The Contractor shall supply all equipment and necessary supplies needed to complete the SCPTu soundings, repair any property damage, backfill all holes, and dispose of spoils, fluids, and cuttings. The Contractor shall also provide the form to be used and filled out for the completion of daily safety tailgate meetings.

5.0 MEASUREMENT AND PAYMENT: Contractor shall itemize all costs for a singular, final invoice not to exceed contracted amount that includes the following categories. Also see Contract Section 6.5 Compensation.

5.1 Administration: The invoice line item of Administration shall be considered payment in full for all materials, equipment, labor, mileage and incidentals related to the administration of this contract. This includes but is not limited to, production and submittal of the Pollution Control Plan, production and submittal of all CPT sounding reports. Payment is included in the Administration Bid Item. Payment for this item shall not be issued until ODOT have received a copy of all Oregon Water Resource Department (OWRD) CPT sounding reports indicating they have filled out using the assigned OSU/PSU sounding number, signed by the driller, and submitted to OWRD. Payment shall be lump sum.

5.2 Mobilization: The invoice line item of Mobilization shall be considered payment in full for all materials, equipment, labor, mileage and incidentals necessary to mobilize and demobilize all equipment and supplies to and from and within the project site. This item includes payment for any and all special equipment and labor necessary to accomplish the job (i.e. platforms, vehicles, cats, winches, cranes, helicopters, etc.). This item includes time required to setup the CPT rig and any ancillary equipment. This item also includes any safety related items such as handrails and fall protection rails. Payment shall be per each mobilization, with two mobilizations allowed for the project for the two time points before and after Pile Driving and Pile Testing. Payment shall be lump sum.

5.3 Drums (55-gal., non-contaminated): The invoice line item of Drums (55-gal., non-contaminated) shall be considered payment in full for all labor, materials, equipment and incidentals necessary to transport and dispose of barrels containing non- contaminated spoils. Payment for this item will be per drum.

5.4 Drums (55-gal., contaminated): The invoice line item of Drums (55-gal., contaminated) shall be considered payment in full for all labor, materials, equipment and incidentals necessary to transport labeled and secured barrels containing contaminated spoils to the nearest ODOT Maintenance Yard. Payment for this item will be per drum.

5.5 Seismic Cone Penetration Testing: The invoice line item of Seismic Cone Penetration Testing shall be considered payment in full for all materials, equipment, labor, and incidentals necessary to prepare the site, advance the exploration soundings to the depths required, abandon these holes in accordance with Oregon Water Resources rules and regulations, patch existing pavement, data preparation and delivery, site clean-up, and disposal of all spoils and cuttings. SCPTu measurements and payment shall be based on the nearest lineal foot. Payment for pore water pressure dissipation tests will be based on time required to complete the tests. Payment for pre- drilling is based on the nearest lineal foot.

5.6 Standby Time: The invoice line item for Standby time shall be paid at an hourly rate to the nearest quarter of an hour with the maximum not to exceed eight hours or the balance of an eight-hour shift not worked due to ODOT induced standby, whichever is less in a calendar day or work shift if working nights. Standby shall include all time during which the Contractor is unable to perform CPT work because of a directive from the ODOT representative, which is not related to the Contractor’s performance or lack of adherence to this contract. The ODOT representative shall order standby at the offered rate if conditions warrant. Standby shall include delays of work due to adverse weather conditions only if directed by the ODOT representative. Standby shall not be paid for delays of work resulting from the Contractor’s equipment failure, safety issues, while moving between sounding locations, or actions of others coordinated through the contractor. Standby shall be paid for the daily required safety tailgate meetings. The amount of standby for any and all shifts shall be documented on a per shift basis to the nearest quarter of an hour by both ODOT and the Contractor’s on-site responsible supervisor. Such records shall be submitted with invoices.

5.7 Traffic Control: The invoice line item for Traffic Control shall be considered payment in full for all materials, equipment, labor, incidentals necessary to provide adequate traffic control. Payment shall be lump sum.

SCOPE OF WORK AND TECHNICAL SPECIFICATIONS

OSU DIATOMACEOUS SILT RESEARCH CPT CONTRACT

Figure 1. Vicinity map of all exploration locations.

Figure 2a. Detailed site view for Buck Creek explorations.

Figure 2b. Site picture February 2024

Figure 3a: Right of way and permanent easement for slopes for CPT testing

Figure 3b. Possible footprint of equipment staging and load test.

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