PWS_Amend_1_0001.docx

PERFORMANCE WORK STATEMENT (PWS)

Innovative Use of the High-Resolution K (HRK) Logging for Optimizing Dewatering System Designs

1.0 INTRODUCTION

Dewatering systems involve the control of regional groundwater elevation in the vicinity of an excavation area, typically with pumping systems. Sump pumping for poorly drained zones can be effective; however, seepage through the excavation areas can cause significant risks to slope instability and other construction problems. Current practices for investigating hydrogeologic properties are limited by the significant spatial variability that traditional, well-based investigations cannot capture. Therefore, an integrated HPT, HRK, and NMR site characterization program could provide valuable insights into the site-specific groundwater and subsurface geologic conditions and aid in designing effective dewatering systems for excavations at multiple Reclamation sites.

Reclamation has performed many investigation programs for the dam safety office that involved conducting aquifer performance tests and designing dewatering systems for understanding geological formation and groundwater conditions in excavation sites. A real-time HPT system approach to identify permeable zones of aquifer formations has been considered for suitable well designs. This approach will provide accurate screened zones and hydrogeological parameter estimations of aquifer systems prior to further aquifer testing program and appropriate dewatering system designs in excavation areas of dam sites. The HPT testing program could be a valuable component of the overall effort to characterize the site-specific groundwater and subsurface geologic conditions. HPT data could be used to inform aquifer formation conditions and enable proper and efficient design of dewatering systems.

A major benefit of HPT is the savings realized by optimizing the layout of soil borings and well installations to be used for subsurface characterization. As a field investigation tool, HPT provides valuable real-time data about formation lithology, K, and the piezometric profile, which guide proper well placement and design for targeted zones. The HPT data helps define an appropriate aquifer testing program and gives reliable geological profiles to initiate hydrogeological parameter inputs to the groundwater modeling resulting in economical dewatering system designs.

The innovative use of HPT, HRK, and NMR for improved subsurface investigations to assist with dewatering system designs in excavations can provide immediate, future, and long-term improved site characterization for a variety of field projects at Reclamation sites. During the initial stage of site investigation, these approaches can provide a quick understanding of subsurface formation properties, and result in more efficient and targeted investigations and field systems designs in subsequent phases.

2.0 DEFINITIONS

Contracting Officer (CO) – A duly appointed person with the authority to enter into, administer or terminate purchase orders, and to make findings and determinations on behalf of the United States Government. This is the only individual authorized to change the purchase order or any of the requirements stated herein.

Contracting Officer’s Representative (COR) – The individual, designated and authorized in writing by the contracting officer to perform specific technical or administrative functions for the separate construction contract awarded to the contractor.

Contractor – The contractor to perform the work required for this specific task order. The individual, partnership, company, or corporation responsible for the duties and responsibilities under the task order.

3.0 SCOPE

The objective of this contract is to acquire a contractor technical service to evaluate the application of a High-Resolution K (HRK) logging system for improved subsurface investigations to assist with dewatering system designs in excavations with known experts in the field of subsurface investigation research. This contract is to conduct a research project into the understanding of subsurface site conditions at lower costs with the use of an HRK logging system.

While HPT can be used to quickly assess the vertical change in aquifer properties at many locations, the direct push permeameter (DPP) component of HRK allows hydraulic conductivity (K) to be measured at a much larger range than HPT, as well as a more reliable conversion of HPT data into K estimates by performing site-specific calibrations.

The contractor shall perform the following tasks:

a. Perform the HRK in-situ subsurface tests at each identified research site.

b. Collect low-K soil samples with direct push soil sampling tools at each site.

c. Develop an empirical relationship for K estimates in the low-K formations.

d. Communicate progress by both email and conference call conversations.

e. Develop a field protocol and data analysis procedure to measure hydraulic conductivity using an HRK system for optimizing dewatering system designs.

f. Work with research team members to utilize the HRK logging system.

g. Present the draft report results derived from this research effort within three (3) months after award. The results of this study will be reviewed by interested regional partners and Technical Service Center (TSC) engineers. Reclamation will complete to review the progress report within 3 weeks and send the contractor any necessary items needing corrections before submitting a final report.

h. Write and submit a final report within 6 months after the awarded of each project tasks.

The above HRK field logging test is forecasted for three different locations and setup as three separate tasks and shall be exercised as following:

- Task 1: for the Scoggins dam in Oregon shall be issued at award.

- Optional Task 2: Hyrum dam in Utah, and

- Optional Task 3: Altus dam in Oklahoma.

4.0 QUALIFICATIONS

The contractor must have the HRK logging system that should be compatible with CPT truck and an Art’s Manufacturing & Supply (AMS) drill rig with Direct Push (DP) capability that Reclamation has. The contractor shall demonstrate the following qualifications by providing three (3) prior works.

4.1 The contractor shall be proficient in research science studies on the geologic resources and hazards such as groundwater, rocks and minerals, and earthquakes.

4.2 The contractor shall have knowledge in groundwater well monitoring for unconsolidated aquifers such as alluvial deposits.

4.3 Contractor shall have 10 to15 years’ experience in aquifer field methods for obtaining detailed information about groundwater conditions, interpretation of water level changes in wells, interaction between groundwater and surface water, and the impact of pumping, land use and climate change on groundwater resources.

4.4 Contractor shall have documented experience in work focusing on the development of field-based methods for more efficient and accurate characterization of groundwater flow and contaminant transport in shallow, unconsolidated settings. Contractor shall have a leading role on a number of projects that seek to obtain high-resolution measurement of subsurface hydraulic conductivity using methods such as direct-push profiling, nuclear magnetic resonance, and distributed temperature sensing. Contractor shall explore innovative ways of integrating different methods to achieve optimal site characterization under complex field conditions.

4.5 Contractor shall have knowledge in direct push permeameter (DPP) and HRK for characterizing vertical variations in hydraulic conductivity (K) in shallow unconsolidated settings. The DPP measurement provides quantitative K measurements and can be used to realize the potential of HPT more fully.

5.0 PERIOD OF PERFORMANCE

The Bureau of Reclamation, Acquisitions Office, Denver, Colorado plans to make a Firm Fixed Priced award. This requirement is for a base 1 year performance period with the option to exercise two additional tasks, three (3) years in total.

The HRK field logging test is expected to be performed three locations: Scoggins dam in Oregon, Hyrum dam in Utah, and Altus dam in Oklahoma.

Task 1 is for the Scoggins dam in Oregon. The field-testing program is expected to take one (1) week, starting on May 10, 2024, and going through May 16, 2024, to include mobilization and demobilization days.

The other two task will be set up as optional task and will be exercised accordingly:

Optional Task 2: Hyrum dam in Utah, and Optional Task 3: Altus dam in Oklahoma.

6.0 GOVERNMENT-FURNISHED EQUIPMENT (GFE) AND MATERIALS

6.1 GFE: None

6.2 Government Furnished Materials:

Site maps, geological information, and location coordinates will be made available for contractor use.

6.3 Government Furnished Utilities: None

6.4 Contractor-Furnished Equipment and Materials:

The Contractor shall be responsible for providing all necessary equipment, materials, and supplies to accomplish all tasks.

7.0 REGULATIONS / POLICIES:

The field test shall be in accordance with the Reclamation Safety and Health Standards (RSHS): https://www.usbr.gov/safety/rshs/index.html

8.0 TRAVEL: The contractor is responsible for arranging all transport and travel costs associated with the work onsite.

9.0 GOVERNMENT VEHICLES: Contractor will not use any Government vehicle either as a driver or passenger.

10.0 SECURITY: The Contractor shall have a Reclamation escort while on government property, including during the field logging test.

11.0 DELIVERABLES

The following paragraphs and table below provide a listing of deliverables, the media required, and the recipients. Electronic documents shall be generated in, and formatted as:

• Microsoft Office Word for documents and reports,

• Excel for spreadsheets, and

• Adobe PDF format for all other deliverables.

Contractor shall submit to Reclamation a final progress report that contains a list of developing an empirical relationship for K estimates in the low-K formations and a field protocol and data analysis procedure to measure hydraulic conductivity using the HRK logging system for optimizing dewatering system designs. Within 6 months after awarded, a final report will be submitted to Reclamation. In addition, monthly updates throughout the project duration will be provided via a monthly conference call.

11.1 Progress Report

- List of field logging profiles of soil hydrogeologic properties using the HRK system.

11.2 Final Report

- List of field logging profiles of soil hydrogeologic properties using the HRK system

- Developing an empirical relationship for K estimates in the low-K formations

- Field protocol and data analysis procedure to measure K using the HRK system

11.3 Deliverable Table

3.0 (g), 11.1

3.0 (h), 11.2

12.0 PERFORMANCE REQUIREMENTS SUMMARY

The following table summarizes the tasks and performance standard.

Task No.

Task Description

Performance Indicator (1)

Performance Standard Minimum Acceptable Quality Level

Note: (1) The performance date for each task will be determined within 30 days after awarded.

13.0 QUALITY ASSURANCE SURVEILLANCE PLAN (QASP): The designated PM, technical representative, and the COR will closely monitor performance quality and progress, timely submission of deliverables, compliance with performance standards, and ensure invoices are accurate and appropriate.

14.0 IDENTIFICATION OF CONTRACTOR EMPLOYEES

All contract personnel are required to identify themselves as contractors.