140A1121Q0039_Terms_and_Conditions.pdf

BIA Western Regional Office Sol. No. 140A1121Q0039

1. SECTION B SUPPLIES OR SERVICES AND PRICES

QUOTE SCHEDULE

2. SECTION C DESCRIPTION / SPECIFICATIONS

Specification / Statement of Work / Performance Work Statement

3. SECTION F DELIVERIES OR PERFORMANCE

52.203-19 Prohibition on Requiring Certain Internal Confidentiality Agreements or Statements January 2017 52.222-20 Contracts for Materials, Supplies, Articles and Equipment Exceeding $15,000 May 2014 52.223-6 Drug-Free Workplace May 2001 52.242-15 Stop-Work Order August 1989

4. SECTION G CONTRACT ADMINISTRATION DATA

DOI Electronic Invoicing and Payment Requirements – Invoice Processing Platform (IPP) April 2013

5. SECTION H SPECIAL CONTRACT REQUIREMENTS

No Text Messaging While Driving (policy) Core Working Hours: Days of Work / Hours of Work

6. SECTION I CONTRACT CLAUSES

1452.226-70 Indian Preference. —Department of the Interior April 1984 (Deviation) 1452.280-2 Notice of Indian Economic Enterprise Set-Aside July 2013 1452.280-3 Subcontracting Limitations July 2013 52.203-99 Prohibition on Contracting with Entities that Require Certain

Internal Confidentiality Agreements February 2015 52.204-13 System for Award Management Maintenance October 2016 52.217-8 Option to Extend Services November 1999 52.217-9 Option to Extend the Term of the Contract March 2000 52.222-4 Contract Work Hours and Safety Standards-Overtime March 2018 Compensation

52.222-6 Construction Wage Rate Requirements August 2018 52.222-7 Withholding of Funds May 2014 52.222-8 Payrolls and Basic Records August 2018 52.222-9 Apprentices and Trainees July 2005 52.222-10 Compliance with Copeland Act Requirements February 1988 52.222-11 Subcontracts (Labor Standards) May 2014 52.222-12 Contract Termination—Debarment May 2014 52.222-13 Compliance with Construction Wage Rate Requirements and Related Regulations May 2014 52.222-14 Disputes Concerning Labor Standards February 1988 52.222-15 Certification of Eligibility May 2014 52.222-16 Approval of Wage Rates May 2014

52.236-5 Material and Workmanship April 1984 52.236-5 Material and Workmanship April 1984 52.242-14 Suspension of Work April 1984 1452.228-70 Liability Insurance—Department of Interior July 1996 52.252-2 Clauses Incorporated by Reference October 2004

7. SECTION J LIST OF DOCUMENTS, EXHIBITS, AND OTHER ATTACHMENTS

DOI Policy - Prohibition on Texting While Driving Figures

Attachment A – Civil Specifications

Service Contract Labor Standards javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

Wage Rate Requirements

Past Performance Questionnaire

8. SECTION K REPRESENTATIONS, CERTIFICATIONS, AND OTHER STATEMENTS OF BIDDERS

1452.280-4 Indian Economic Enterprise Representation July 2013

52.203-98 Prohibition on Contracting with Entities that Require Certain Internal Confidentiality Agreements—Representation February 2015 (Deviation 2015-02)

52.203-18 Prohibition on Contracting with Entities that Require Certain Internal Confidentiality Agreements or Statements-Representation January 2017

52.204-17 Ownership or Control of Offeror July 2016 52.204-19 Incorporation by Reference of Representations and Certifications December 2014 52.204-20 Predecessor of Offeror July 2016 52.204-24 Representation Regarding Certain Telecommunications and Video

Surveillance Services or Equipment December 2019 52.209-2 Prohibition on Contracting with Inverted Domestic Corporations—

Representation November 2015 52.209-5 Certification Regarding Responsibility Matters August 2020 52.209-7 Information Regarding Responsibility Matters October 2018

52.209-11 Representation by Corporations Regarding Delinquent Tax Liability or a Felony Conviction under any Federal Law February 2016

52.209-13 Violation of Arms Control Treaties or Agreements—CertificationJune 2018 52.222-22 Previous Contracts and Compliance Reports February 1999

52.222-25 Affirmative Action Compliance April 1985 52.225-25 Prohibition on Contracting with Entities Engaging in Certain Activities or Transactions Relating to Iran—Representation and Certifications October 2015 52.222-57 Representation Regarding Compliance with Labor Laws

(Executive Order 13673) December 2016 52.230-7 Proposal Disclosure—Cost Accounting Practice Changes April 2005 52.252-1 Solicitation Provisions Incorporated by Reference February 1998

9. SECTION L INSTRUCTIONS, CONDITIONS, AND NOTICES TO BIDDERS

52.204-6 Unique Entity Identifier October 2016 52.204-7 System for Award Management October 2016 52.204-8 Annual Representations and Certifications March 2020

52.204-16 Commercial and Government Entity Code Reporting July 2016 52.204-17 Ownership or Control of Offeror July 2016

52.204-18 Commercial and Government Entity Code Maintenance July 2016 52.204-26 Covered Telecommunications Equipment or Services-- December 2019 Representation 52.212-1 Instructions to Offerors—Commercial Items July 2021

52.216-1 Type of Contract April 1984 1452.280-1 Notice of Indian Small Business Economic Enterprise Set-Aside July 2013

1452.233-2 Service of Protest Department of the Interior July 1996 (Deviation) 52.252-1 Solicitation Provisions Incorporated by Reference February 1998

10. SECTION M EVALUATION FACTORS FOR AWARD

General 52.212-2 Evaluation—Commercial Items October 2014 javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

SECTION B SUPPLIES OR SERVICES AND PRICES

Provide all labor, equipment, and materials to provide and install equipment as listed in the statement of work below.

Task Item Description Cost

1 Project Coordination and Communication

Task 1 Subtotal

2 Project Schedule and Organization

Task 2 Subtotal

3 PCB Contaminated Soil Removal, Assessment, and Disposal Planning

3-1 Update PCB Cleanup Application and Plan

3-2 Sampling and Analysis Plan

3-3 Health and Safety Plan

3-4 Dust Control Permit and Plan

3-5 Perimeter Area Access Agreements

Task 3 Subtotal

4 Historic Properties Treatment Planning, Fieldwork, and Reporting

4-1 Memorandum of Agreement (MOA)

4-2 Historic Properties Treatment Plan (HPTP)

4-3 Archaeological Testing Fieldwork and Reporting (All Tasks)

4-4 Archaeological Monitoring Fieldwork and Reporting (All Tasks)

Task 4 Subtotal

5 Site Preparation

5-1 Clearing and Grubbing

5-2 Asphalt Removal

5-3 Utility Clearance and Surveying

5-4 Geotechnical Services

Task 5 Subtotal

6 Excavation, Transportation, and Disposal of PCB Contaminated Soils

6-1 PCB AOC-1 and Vicinity

6-2 PCB AOC-2

6-3 PCB AOC-3 and Vicinity

6-4 PCB AOC-4

6-5 PCB AOC-5 and Vicinity

6-6 North Maintenance Yard

6-7 Perimeter Area - North

6-8 Perimeter Area - Southwest

6-9 Perimeter Area - East

6-10 Concrete Pad Area

6-11 North Retention Basin

6-11 South Retention Basin javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

6-12 to 6-

Sediment Loss Prevention, Soil Loading, Staging, and Storage Operations, Decontamination Area

Task 6 Subtotal

7 Soil Sampling and Laboratory Analysis

7-1 Pad Area Assessment

7-2 Retention Basin Area

7-3 Step-Out Sampling

7-4 Asphalt and Concrete Assessment

7-5 Waste Profiling and Additional Characterization

7-6 Confirmation Sampling

Task 7 Subtotal

8 Borrow Source Evaluation, Backfill, and Site Restoration

Task 8 Subtotal

9 Equipment Laydown Pad Construction

Task 9 Subtotal

10 Retention Basin Design and Engineering

Task 10 Subtotal

11 Project Completion and Site Condition Documentation

11-1 PCB Cleanup Report

11-2 Land Use Covenant

Task 10 Subtotal

Bid Total

OPTIONAL ITEMS

Optional

Rate SCIP Cleanup Project Disciplines

Principal/Program Manager ($/hr)

Project Manage ($/hr)

Field Manager ($/hr)

Chemist ($/hr)

Reporting Author ($/hr)

GIS/Graphics ($/hr)

Database Manager ($/hr

Construction Manager ($/hr)

Lead Archaeologist ($/hr)

Archaelogist ($/hr)

Geologist ($/hr) javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

Rate Geotechnical/Water Resources Engineer ($/hr)

Design Engineer $/hr)

CAD Specialist ($/hr)

Quality Control Manager($/hr)

SCIP Cleanup Project Miscellaneous Rates

Travel ($/trip) Airfare or vehicle as applicable

Per Diem ($/day) Includes all costs

Field Truck per Day ($/day)

Option 1-1 Project Coordination and Communication

Option 4-3 Archaeological Testing Fieldwork and Reporting (All Tasks)

Option 4-4

Archaeological Monitoring Fieldwork and Reporting (Tasks 6, 9 & 10)

Option 5-2 Asphalt and Concrete Removal

Concrete Disposal (non-TSCA waste) ($/ton) Includes all costs

Concrete Disposal (TSCA waste) ($/ton) Includes all costs

Asphalt Disposal (non-TSCA waste)($/ton) Includes all costs

Asphalt Disposal (TSCA waste)($/ton) Includes all costs

Option 6 Excavation, Transportation, and Disposal of PCB Contaminated Soils

Soils Disposal (less than 1 mg/kg PCBs) ($/ton) Includes all costs

Soils Disposal (1 mg/kg to 50 mg/kg PCBs) ($/ton) Includes all costs

Soils Disposal (greater than 50 mg/kg PCBs) ($/ton) Includes all costs

Option 6-7 Option A - Perimeter Area – North LUMP SUM FIXED-PRICE

Option 7 Soil Sampling and Laboratory Analysis

EPA 8082 Aroclor Analytical ($/sample) Include all related costs less labor

Option 7-6 Option A - Confirmation Sampling LUMP SUM FIXED-PRICE

Option 8 Borrow Source Evaluation, Backfill, and Site Restoration

Backfill for Perimeter Areas ($/ton) Includes all costs

Backfill for Yard using North Retention Basin Soils ($/ton) Includes all costs

Option A - Perimeter Area – North LUMP SUM FIXED-PRICE

Option 10 Retention Basin Design and Build

Class V 12" RCP ($/lf) Material and delivery costs only

Class III 18" RCP ($/lf) Material and delivery costs only

Class III 24" RCP ($/lf) Material and delivery costs only

Class III 36" RCP ($/lf) Material and delivery costs only

24 x 38-inch horizontal elliptical pipe ($/lf) Material and delivery costs only javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

Rate 48-inch manhole with cover ($/each) Material and delivery costs only

60-inch manhole with cover($/each) Material and delivery costs only

Import gravel ($/ton) Material and delivery costs only

NAICS code 562910 with a 750-employee size standard applies.

CONTRACTOR________________________________________ DUNS#________________________________

PHONE # ________________________ EMAIL ADDRESS____________________________________

QUOTE SCHEDULE

The quote amount is to be inclusive of all costs to complete the requirement, including but not limited to, all applicable taxes (Federal, State & Tribal), all labor and supervision, equipment, material & supplies, permits, etc.

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SECTION C DESCRIPTION / SPECIFICATIONS

TABLE OF CONTENTS

1.0 Introduction

1.1. Site Description and Background

Current Conditions

Cultural Setting

Surrounding Land Use

1.2. Regulatory Framework and Agency Interaction

2.0 Summary of Prior Investigations

2.1. Follow-up PCB and UST Investigations (1991)

2.2. Preliminary Assessment & Removal of Fuel Storage Tanks

Initial Assessment (2014)

Supplemental Assessment (2015)

2.3. SSI Workplan and HHRA (2018)

2.4. Supplemental Site Investigation (2019 - 2020)

3.0 Statement of Work

Task 1: Project Coordination and Communication

Task 2: Project Schedule and Organization

Task 3: PCB Contaminated Soil Removal, Assessment and Disposal Planning

3-1 Update PCB Cleanup Application and Plan

3-2 Sampling and Analysis Plan

3-3 Health and Safety Plan

3-4 Dust Control Permit and Plan

3-5 Perimeter Area Access Agreements

Task 4: Historic Properties Treatment Planning, Fieldwork, and Reporting

4-1 Memorandum of Agreement

4-2 Historic Properties Treatment Plan

4-3 Archaeological Testing, Fieldwork and Reporting

4-4 Archaeological Monitoring, Fieldwork and Reporting

Task 5: Site Preparation

5-1 Clearing and Grubbing javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

5-2 Asphalt Removal

5-3 Utility Clearance

5-4 Surveying

5-5 Geotechnical Services

Task 6: Excavation, Transportation and Disposal of PCB Contaminated Soils

6-1 AOC-1 and Vicinity

6-2 AOC-2

6-3 AOC-3 and Vicinity

6-4 AOC-4

6-5 AOC-5 and Vicinity

6-6 North Maintenance Yard

6-7 Perimeter Area – North

6-8 Perimeter Area – Southwest

6-9 Perimeter Area – East

6-10 Concrete Pad Area

6-11 Retention Basin Area

6-12 Sediment Loss Prevention

6-13 Soil Loading, Staging, and Storage Operations

6-14 Decontamination Area

Task 7: Soil Sampling and Laboratory Analyses

7-1 Pad Area Assessment

7-2 Retention Basin Area Assessment

7-3 Step-Out Sampling

7-4 Asphalt and Concrete Assessment

7-5 Waste Profiling and Additional Characterization

7-6 Confirmation Sampling

Task 8: Borrow Source Evaluation, Backfill, and Site Restoration

Task 9: Equipment Laydown Pad Construction

Task 10: Retention Basin, Drainage Piping, and Catch Basin Design and Build

Task 11 Project Completion and Site Condition Documentation

11-1 PCB Cleanup Report javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

11-2 Land Use Covenant

4.0 Deliverables

5.0 Place of Performance

6.0 Period of Performance

7.0 Optional Work

Task 1 Optional Work

Task 4 Optional Work

Task 5 Optional Work

Task 6 Optional Work

Task 7 Optional Work

Task 8 Optional Work

Task 10 Optional Work

8.0 Notice to Bidders

List of Attachments javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

1.0 INTRODUCTION

Soil containing polychlorinated biphenyl (PCB) concentrations above human-health risk-based screening levels are present at the Bureau of Indian Affairs (BIA) San Carlos Irrigation Project (SCIP) Operation & Maintenance Facility Maintenance Yard (Yard) and in areas north, east, and south of the Yard, in Coolidge, Arizona. PCB data collected from 2014 through 2016 is summarized in the Preliminary Assessment (PA) (E.W. Wells Group, 2017). This data was used to perform a human health risk assessment (HHRA) and develop a human health risk conceptual site model (CSM). This information was used to develop the Supplemental Site Investigation (SSI) Work Plan (Helios Resources, 2018). HHRA results indicate that PCB concentrations in established exposure areas pose risks within the United States Environmental Protection Agency (USEPA) risk range. Data collected during the SSI was used to further refine the CSM and HHRA and to establish a risk-based remedial approach.

A draft PCB Cleanup Application and Plan is currently being developed to complete the remedial action in accordance with the Toxic Substances Control Act (TSCA), Title 40 Code of Federal Regulations (CFR), Chapter I, Subchapter R, Part 761.61(c). Through a competitive selection process, the selected contractor will implement remedial actions according to this Statement of Work (SOW) and the USEPA approved PCB Cleanup Application and Plan at areas in the Yard; and north, south, and east of the Yard.

All actions obligating the BIA as it relates to contractual work, optional work, and modifications will require approval by the Contracting Officer (CO). These obligations include any changes including extensions, stop-work orders, modifications to the SOW, or any written or implied changes. All deliverables and technical issues shall be provided and reported respectively to the Contracting Officer’s Representative (COR).

1.1. SITE DESCRIPTION AND BACKGROUND

The Site is described by the 13‐acre SCIP Maintenance Yard (Yard) and areas to the north, south and east where PCBs have been identified. The SCIP property is described by the Yard and adjoining project offices located at 13805 N.

Arizona Boulevard, approximately two miles north of downtown Coolidge, Arizona at the junction of Highways 87 and 287 (Figure 1). The SCIP property includes SCIP offices, a large maintenance yard, maintenance shops, a former herbicide and possible pesticide storage area, and a former diesel-powered electric generating plant and metering building.

Approximately one third of the property is paved. An electrical substation is located inside a gravel-covered, fenced area near the center of the Yard. Prior to removal in 2014, one 100,000-gallon diesel aboveground storage tank (AST), two 6,000-gallon lubricating oil product ASTs, one 1,000-gallon used motor oil AST, and one 2,000-gallon diesel pressure relief AST were present in the Yard. Property, Site and Yard features are shown on Figure 2.

Transformers with oil containing PCBs were used and managed at the Yard for many years prior to regulation by the USEPA. Between the 1930s and 1970s, a standard practice of SCIP personnel included the application of used oil from decommissioned PCB and non-PCB containing transformers to surface soils to mitigate dust from unpaved parking areas and roadways within the Yard.

Site description details are presented in the PA (E.W. Wells Group, 2017) and SSI Work Plan (Helios Resources, 2018) and summarized below.

Current Conditions

Current SCIP operations include distribution and metering of electricity and irrigation water utilities; storage and service of electrical transformers; fuel storage and fueling operations; and parking and maintenance of vehicles and heavy‐duty electricity and irrigation equipment. SCIP does not currently generate electricity, but transmits and distributes purchased electricity, and distributes irrigation water for agricultural customers on the Gila River Indian Community lands and the San Carlos Irrigation and Drainage District lands located in central Pinal County.

Cultural Setting

The Site and adjacent properties are located within the Grewe Site, a National Register of Historic Places eligible prehistoric archaeological site. The Grewe Site is culturally sensitive, and several tribes consider it a traditional cultural property. Previous excavations at the Grewe Site have identified buried artifacts and features including canals, pit houses, communal earth ovens, and burials. Due to the cultural sensitivity of the Grewe Site, future remediation plans will be coordinated with input from the Arizona State Historic Preservation Office (SHPO) and tribal representatives.

Surrounding Land Use

Land use around the Yard is generally agricultural. The Yard, which is owned by the BIA, is identified by the Pinal County javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','')

Assessor’s Parcel Number (APN) 209‐10‐0110. Properties adjacent to the Yard are shown on Figure 2 and include the following:

1. Union Pacific Railroad Parcel, a portion of which is identified as Perimeter Area – East, is directly east of the Yard and is a right-of-way for the rail line (APN 209-10-0200).

2. State of Arizona Parcel, portions of which are identified as Perimeter Area – Southwest and Perimeter Area – South, is owned by the State (APN 209-10-0160). The southern part of the property is used by Arizona Department of Transportation (ADOT) as the right- of-way for Highway 287.

3. MLC Family Trust Parcel, a portion of which is identified as Perimeter Area – North, is owned by MLC Farms LLC (APN 209-10-0070).

4. The BIA owns the parcels to the west of the Yard (APNs 209-10-010A and 10B).

1.2. REGULATORY FRAMEWORK AND AGENCY INTERACTION

BIA has developed the SOW in coordination with USEPA Region 9, Office of Land Division, Corrective Action section, for the purpose of remediating PCB contamination at the Site in accordance with Title 40 CFR, Chapter I, Subchapter R, Part

761.61 (c). The SOW describes the planned extent and methods of remedial activities, and the sample collection and analysis procedures to be followed to verify the removal of soil exceeding the following USEPA-approved Regional Screening Levels (RSLs)/PCB cleanup goals in milligrams per kilogram (mg/kg) (Helios Resources, 2018):

• Yard Area: 10 mg/kg;

• Perimeter Area – North and – Southwest: 0.23 mg/kg (USEPA residential RSLs) (USEPA, 2020); and

• Perimeter Area – East: 2 mg/kg.

2.0 SUMMARY OF PRIOR INVESTIGATIONS

The BIA investigated the SCIP Maintenance Yard for PCBs in 1982 and found concentrations above 50 parts per million (ppm) in surface and subsurface soil north of the old diesel building and at the northeast corner of the transformer storage area. The initially identified ground surfaces with elevated PCB concentrations were paved with asphaltic concrete pavement as an interim measure to limit PCB migration and to mitigate human health hazards (BIA RFP, 2013).

2.1. FOLLOW-UP PCB AND UST INVESTIGATIONS (1991)

The BIA conducted additional PCB soil sampling in 1991 (GPI, 1991) to delineate PCB contamination documented in the 1982 investigation. Five distinct areas of PCB contamination at the Site were identified with PCB concentrations above 50 ppm to a depth of 1 foot below ground surface (bgs); these were designated as PCB areas of concern (AOCs) 1 through 5 (Figure 3). Three of the AOCs had been previously paved. Additional sampling locations reportedly contained PCB concentrations of less than 50 ppm, although supporting data was not included in the report.

Total petroleum hydrocarbons (TPH) in soil were investigated at two Yard locations described as follows: (1) adjacent to the 100,000‐gallon diesel AST; and (2) at the former pump dispenser island area located near the southeast corner of Building 113. TPH was detected at up to 16,000 mg/kg at depths up to approximately 30 feet (ft) bgs.

2.2. PRELIMINARY ASSESSMENT & REMOVAL OF FUEL STORAGE TANKS

The PA was planned and implemented with technical support and direction provided by the USEPA Region 9 TSCA Program Office. Soil analytical results indicated localized and shallow areas of PCB contamination in the Yard and on adjacent properties. Project details are presented in the PA (E.W. Wells Group, 2017). The sections below provide a synopsis of the PA, with a focus on the PCB assessment activities.

The assessments conducted at the Site consisted of two evaluations. The initial assessment focused inside the Yard fence on areas where TPH and/or PCBs had been identified by previous investigations. The supplemental assessment focused on perimeter areas within and adjacent to the Yard.

Initial Assessment (2014)

The initial 2014 assessment included subsurface investigations at AOCs 1 through 5. In preparation for the assessment, the Yard was divided into 40-foot grid squares to establish a reference grid for sampling locations. PCB assessment activities included drilling and sampling a total of 228 shallow borings (up to 3 ft bgs). A Geoprobe, with direct push technology, was used to drill and collect the samples. The perimeter areas were sampled using hand tools from 0 to 3 inches and 3 to 12 inches.

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Since the five AOCs represented locations of significant PCB deposition, samples were collected at a closer spacing of 10 to 15 ft while the larger overall Yard grid samples were collected using a 40-foot grid spacing pattern.

A 2.0-inch diameter macro sampler equipped with an acrylic sample liner was utilized to collect soil samples in unpaved areas. In paved areas, the upper sample was initiated from directly beneath the pavement to the desired depth. At the five AOCs, samples were collected at depths from 0 to 3 inches, 3 inches to 1 foot, and 1-foot to 2 ft bgs. Additional PCB grid locations were sampled at approximately 0 to 3 inches, and 3 inches to 1-foot bgs.

Supplemental Assessment (2015)

The supplemental assessment was completed from June 16 through 25, 2015 and included collecting soil samples to identify and characterize potential PCB contamination in near-surface soil in “perimeter area” properties located to the northwest, north, west, southwest and east of the Yard. These assessments were necessary for BIA to characterize contamination, both at the SCIP property, and at adjacent parcels to determine the extent of PCB contamination in the soils. In addition, the supplemental assessment included collection of near-surface soil samples from each of three distinct areas within the Yard, designated as Exclusion Areas (EA) 2 through 4. Sampling and analysis of soil in the EAs were necessary to evaluate whether these locations could be excluded from future remedial action.

EA 2 is the current substation facility onsite. The ground surface of the transformer area is currently covered with washed rock gravel. Reported PCB concentrations ranged from not detected to 7.6 mg/kg. It was determined that since the area was secured within fencing, a limit of 25 mg/kg was an acceptable threshold, therefore no further action was recommended. EA 3 contains an old house structure, formerly used as an office, and an adjacent lawn area with trees.

No past operations involving PCB use or storage have been identified for Exclusion Area 3. Reported PCB concentrations ranged from not detected to 4.6 mg/kg. This area was determined to require an unrestricted future use therefore a cleanup goal at the residential screening level of 0.23 mg/kg was selected. At the time of this SOW, no further action has been recommended. EA 4 is a grassy area south of the old powerhouse, which is comprised of lawn, a few palm trees, and thick vegetation along the south and east sides. Similar to EA-3, an unrestricted use was determined required for this area and therefore a cleanup goal at the residential screening level of 0.23 mg/kg was selected. All reported PCB concentrations were below the 0.23 mg/kg residential screening level, with two exceptions at 0.36 mg/kg and 0.38 mg/kg.

At the time of this SOW, no further action is required in this area.

Sampling density within the Perimeter Areas and EAs varied during the supplemental assessment phase of the work, between 10-foot and 20-foot grid spacing. A 20-foot grid spacing for samples was selected for EA 2 (substation). A 10-foot grid sample spacing was selected for EAs 3 and 4. Perimeter areas were sampled on a 20-foot grid spacing. Soil samples were collected by hand, using a small shovel and manual digging from a depth of 0 to 3 inches bgs.

EA 1 is in the northwest corner of the site where PCB contamination was not expected to be present. Samples collected in this onsite area are classified as GRID samples and reported PCB concentrations ranged from not detected to 0.64 mg/kg.

2.3. SSI WORKPLAN AND HHRA (2018)

Previous PCB investigations performed between 1982 and 2016 identified PCB concentrations above human-health risk-based screening levels in soils in the Yard and on adjacent properties. Data collected during the PA (E.W. Wells Group, 2017) were used to develop a HHRA and a CSM to inform the SSI Work Plan (Helios Resources, 2018). The purpose of the SSI was to improve definition of the extent of PCBs in soils at and around the Yard. Results of the HHRA were used in developing the SSI sampling plan. The HHRA results indicated PCB concentrations in established Site exposure areas posed risks.

Adjacent properties were identified as: Perimeter Area – Northwest, Perimeter Area -North, Perimeter Area-East, Perimeter Area-Southwest, Perimeter Area-South, and Perimeter Area-West (see Figure 2). Yard areas were identified as: Historical PCB Areas of Concern (AOCs) 1-5 (five separate exposure areas), EAs 1-4, and the “GRID” (remaining sampling grid areas not identified as AOCs or EAs) (see Figure 3).

Perimeter Area – Northwest and Perimeter Area – West were recommended for no further assessment and no action based on the SSI Work Plan HHRA. The remaining exposure areas were recommended for further evaluation, including collection of additional soil samples.

2.4. SUPPLEMENTAL SITE INVESTIGATION (2019 - 2020)

In 2019, to further characterize the extent of PCBs in, and adjacent to the Yard, and to refine the HHRA, the BIA conducted SSI field activities. Data collected during the SSI was used to develop the remediation approach and strategy to: (1) protect workers and future hypothetical offsite residents from PCB exposure; (2) evaluate whether TPH has enhanced the vertical mobility of PCBs in soil; (3) determine if perched groundwater is present within the Yard at depths up to 120 feet bgs; and (4) determine if perched groundwater is impacted by TPH, PCBs or polycyclic aromatic hydrocarbons (PAHs).

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A total of 171 surface soil samples were collected at depths of 0 to 3 inches bgs from the Yard and the perimeter areas. A total of 15 shallow subsurface soil samples from 3 to 12 inches bgs were collected from the Perimeter Area – North, Perimeter Area – Northeast, and Former Transformer Areas 1 and 2 located within the Yard. Five samples in Perimeter Area – East were sampled to characterize the eastern edge of the exposure area along the railroad right-of-way. Surface soils were collected using a hand trowel; shallow subsurface soil samples were collected from soil cores obtained from hand augers.

Using the results of the SSI, an updated HHRA was completed to update the HHRA presented in the SSI Work Plan.

This updated HHRA was used to determine what, if any, remediation is necessary under a risk-based cleanup approach as defined in 40 CFR § 761.61(c). Each exposure area was evaluated for risk to human health by developing an exposure point concentration (EPC) using the PA PCB data set combined with the 2019 and 2020 SSI PCB data set.

A 95% upper confidence limit of the mean (UCL) was the representative statistic used to obtain the EPC for exposure areas. The 95% UCL was developed with the latest version of USEPA ProUCL software, version 5.1.002, using the program’s recommended UCL. Human health risk was calculated using the online USEPA RSL Calculator (EPA, 2020).

Default inputs were used for risk calculation at the 1x10-6 risk level and 1.0 hazard quotient. Default residential receptor inputs were used for the calculation of risk in perimeter areas, and default composite worker inputs were used for calculation of risk onsite. Analytical results from the additional soil samples collected in 2019 and 2020 were combined with the PA soil data to calculate EPCs, given as the 95% UCL as recommended by the ProUCL software, and the associated cancer risk and non-cancer hazard.

In exposure areas Perimeter Area – Southwest and Perimeter Area – North, the EPC was recalculated for hypothetical exposure mitigation to refine the planned removal areas. The resulting EPCs for both areas are below their respective USEPA approved RSLs/PCB cleanup goals following removal action. Based on preliminary results (EPC recalculation) in Perimeter Area – South, removal action is not likely warranted.

The carcinogenic risk for hypothetical future residents is at the low end of the USEPA risk management range in Perimeter Area – East. However, following consultation with Union Pacific, USEPA has indicated land use restrictions would not be required on Perimeter Area–East if the PCB concentrations greater than or equal to 2 mg/kg are defined as hot spots and remediated. Soil removal in seven areas containing detections of Aroclor 1260 greater than or equal to 2 mg/kg will be completed.

In the Yard exposure areas, following the general removal of soil above the PCB cleanup goal of 10 mg/kg at AOCs 1 through 5 and the North Maintenance Yard, values were within the USEPA risk management range.

The results of the SSI demonstrate that the data is of sufficient quality and quantity to move forward with remediation of the Site. A draft PCB Cleanup Application and Plan is currently in development. The purpose of the PCB Cleanup Application and Plan is to comply with TSCA. The plan describes the approach and strategy to implement remedial activities at the Site to achieve unrestricted use under a risk-based cleanup approach as defined in TSCA [40 CFR § 761.61(c)]. The plan describes the extent and methods of remedial activities, and the sample collection and analysis procedures to be followed to verify the removal of soil exceeding the USEPA approved PCB cleanup goals.

3.0 STATEMENT OF WORK

This requirement is primarily for the removal and disposal of PCB contaminated soils at the Site. Soil excavation and removal shall continue to USEPA approved PCB cleanup goals. Excavations shall be backfilled. The contractor will complete the following work elements:

• Project coordination, communication, schedule, organization, and planning

• Finalization of the PCB Cleanup Application and Plan

• Site preparation

• Step-out sampling and analysis

• Assessment of future pad, future retention basin, and asphalt/concrete areas

• PCB contaminated soils removal, transportation, and disposal

• Confirmation sampling and analysis

• Site restoration to include site drainage implementation

• Equipment laydown pad construction

• Design/build of a retention basin and catch basin network

• Project closure and site condition documentation

All necessary permits or approvals will be obtained prior to implementation of field work. Permitting and planning requirements include access agreements, archaeological stakeholder approval, and environmental compliance javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','') requirements. No work shall commence without approval from applicable regulatory agencies and stakeholders.

The contractor will be required to comply with all environmental regulations associated with the work outlined in this SOW. Additional state and local regulations may be triggered by work on lands other than BIA, including ADOT and private properties.

TASK 1: PROJECT COORDINATION AND COMMUNICATION

Due to the COVID-19 pandemic, meetings have been planned to be virtual as much as possible. As COVID-19 conditions improve, the BIA may change the meeting approach to face-to-face meetings. As optional work, the contractor shall submit costs for face-to-face meetings in lieu of virtual meetings. Although meetings are planned to be virtual, the contractor will need to conduct site visits and interact with SCIP personnel as necessary to plan and implement the work requirements in this SOW.

The contractor shall include coordination and communication costs including, but not limited to, nine virtual meetings and three on-site meetings with notes and summaries, meeting preparation and presentations; project status calls, emails, and travel as part of the management costs to complete the requirements in this SOW. Associated with this task, the contractor shall propose and develop the technical approach and project team representation to facilitate communication and coordination. Since the composition and caliber of the project team and support staff will vary among proposals, project team meeting organization and attendance will be critical in evaluating the contractor’s approach to the work and the costs bid for this task. This task shall also include staffing (e.g. GIS, environmental technicians, engineers, etc.) to support the project team. The contractor will be required to utilize Microsoft Teams as their virtual platform for these virtual meetings.

The contractor shall include costs for travel and coordination to support the following 9 virtual and 3 on-site meetings with site reviews:

• Kickoff meeting (virtual) and on-site review of field conditions

• Presentation of draft PCB Cleanup Application and Plan (virtual)

• Presentation of draft cultural resource planning documents (virtual)

• Presentation of design features (retention basins, site drainage, and laydown pad construction) (virtual)

• One on-site meeting with site review, and one virtual meeting during remediation activities

• One on-site meeting with site review to present site work accomplished and draft cleanup documentation to include land use restrictions

• Four additional virtual meetings as determined

TASK 2: PROJECT SCHEDULE AND ORGANIZATION

The contractor shall prepare the project schedule to communicate project milestones for completion of the remedial action. The schedule shall consider and allow at least 30 days for the BIA to review and approve deliverables, and the contractor to plan and implement additional work (e.g. excavation, sampling, and archaeological monitoring should confirmation soil or step out sampling be above cleanup levels). The contractor shall prepare their project organization to include contractor and subcontractor staffing. Key federal and suggested contractor project personnel are provided in Table 2 below. The contractor’s proposal will establish the roles and responsibilities of key contractor personnel.

Contractor staffing disciplines may differ from the conceptual staffing included in this SOW. The contractor should consider that the project schedule will need to be adjusted through the project. Any changes or adjustments to the schedule associated with the optional work will be a part of the costs associated with the applicable optional work/modification.

Table 2: Key Federal and Contractor Project Personnel

Name Organization/Title/Role Telephone Number Address Email Address

John F. Krause BIA/ Program Manager/COR (602) 240-8446 2600 N Central Ave Phoenix, AZ 85004 John.Krause@bia.gov

Randall Brown BIA/CO (520) 723-6208 2600 N Central Ave Phoenix, AZ 85004

Randall.Brown@bia.gov

Ferris Begay SCIP/ SCIP Management (520) 723-6225 13805 N Arizona Blvd Coolidge, AZ 85128 Ferris.Begay@bia.gov javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','') mailto:John.Krause@bia.gov mailto:Randall.Brown@bia.gov mailto:Ferris.Begay@bia.gov

Sara Ziff U.S. EPA Region 9/ Project Manager (415) 972-3536

75 Hawthorne St

SFD8-3

San Francisco, CA 94105

Ziff.Sara@epa.gov

Beau Goldstein SCIP Cultural Resource Manager (BIA contractor) (520) 723-6234 13805 N Arizona Blvd

Coolidge, AZ 85128 Beau.Goldstein@bia.gov

TBD Project Manager TBD Field Manager

TBD Construction Manager - Excavation and Site Work

TBD Field Scientist/Quality Control Manager/Chemist

TBD Lead Archaeologist

TASK 3: PCB CONTAMINATED SOIL REMOVAL, ASSESSMENT AND DISPOSAL PLANNING

The contractor shall update the Draft PCB Cleanup Application and Plan for BIA and USEPA review and approval. The PCB Cleanup Application and Plan includes an update to project management, implementation, and project schedule, Health and Safety Plan (HASP), Sampling and Analysis Plan (SAP), and the Quality Assurance Project Plan (QAPP). The contractor shall present these draft documents to the BIA and stakeholders in a virtual meeting. The BIA and stakeholders shall have 30 days to review the draft PCB Cleanup Application and Plan. Additional requirements include a Dust Control Permit and Plan and Perimeter Area Access Agreements, as discussed herein.

3-1 Update PCB Cleanup Application and Plan

The contractor shall review, edit, finalize, and certify the draft PCB Cleanup Application and Plan completed by Oneida Total Integrated Enterprises with interim approval by the EPA and stakeholders. The contractor shall review and/or update key provisions of the PCB Cleanup Application and Plan to include: (1) project implementation per the requirements of the SOW, including updates to the removal, disposal and assessment of PCB contaminated, or potentially contaminated, soils, asphalt and concrete; and backfill of excavations and site grading; (2) project management, organization (contractor and subcontractor roles and responsibilities), coordination, and communication;

and (3) project schedule.

3-2 Sampling and Analysis Plan

The contractor shall develop a site-specific SAP, which will include the QAPP. The SAP shall communicate sampling and handling methods, containers and preservation requirements, volumes and holding time requirements, and laboratory quality assurance/quality control procedures. Additionally, the SAP will include assessment and oversight, data quality review, and usability procedures. The QAPP will outline the procedures for sampling to ensure that the data collected and analyzed meets the project requirements.

3-3 Health and Safety Plan

The contractor will develop a site-specific Health and Safety Plan (HASP) in accordance with current health and safety standards as specified by the Federal and Arizona Occupational Safety and Health Administration (OSHA). Since PCB concentrations generally range from non-detect to 200 mg/kg, emphasis of the HASP will involve the handling of these soils as it relates to excavation, soil sampling, equipment decontamination, archaeological testing, and data recovery.

Adherence to the requirements and provisions of the HASP are mandatory for all personnel at the Site. All on-site personnel will be required to read and sign the HASP prior to starting the field work.

3-4 Dust Control Permit and Plan

All construction projects in Pinal County require a dust permit if the disturbance to surface is greater than 0.1 acre or javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','') mailto:Ziff.Sara@epa.gov mailto:Beau.Goldstein@bia.gov

4,356 square feet [ft2]. The contractor shall obtain a permit, as the anticipated workspace is equal to approximately 15.3 acres (662,112 ft2). There are four areas (Yard [13 acres], North [1.5 acres], South [0.7 acres], and East [0.8 acres]) requiring earthwork activities. To achieve best management practices, dust will be mitigated by the following procedures:

• Vehicle movement at the Site will not exceed 10 miles per hour at any time

• During earthwork activities, potable water will be sprayed by hose or water truck

• Water dispersion will be increased if visible dust is observed

• Contaminated soil will be staged at a designated stockpile area

• Stockpiled soil will require moisture conditioning and coverage

• Stockpiled soil exceeding 1 mg/kg will be covered with 10-mil plastic sheeting ballasted with sand/gravel bags (when not being worked)

• In the event of transfer of soil from equipment, the soil will be moisture conditioned at the time of transfer

3-5 Perimeter Area Access Agreements

For planned work in Perimeter Area – East, and Perimeter Area – Southwest, access agreements will be required. If BIA is unable to acquire the private property associated with Perimeter Area – North (see further discussion in Task 6-7, “Perimeter Area – North) an access agreement will be required from the private landowner. Costs associated with this work shall be included as optional work. Access agreements will be coordinated through the BIA, Western Region, Real Estate Services. Work in the Perimeter Areas will not commence without the fully executed access agreements. The contractor is responsible to allow sufficient time in the project schedule to obtain these permits without delaying the work.

Access agreements can occur in about 60 days for State and private property, but the access agreement for the Union Pacific property can take about 90 days. For purposes of the bid and the schedule, the contractor should use these timeframes in bidding and planning the project. The contractor is responsible to pay any fees or insurance required to access the perimeter areas.

TASK 4: HISTORIC PROPERTIES TREATMENT PLANNING, FIELDWORK, AND REPORTING

Since ground disturbing activities will be within the Grewe Site, the contractor will be required to work closely with the SHPO and tribal representatives (both through the BIA) to ensure limited impacts to cultural resources.

The contractor will assist in the development of a Memorandum of Agreement (MOA) between BIA and the SHPO with concurrence of stakeholders; and prepare a Historic Properties Treatment Plan (HPTP) to address impacts to cultural resources within the Yard, Perimeter Area – North, Perimeter Area – Southwest, and Perimeter Area – East.

Due to planned additional PCB assessment activities (e.g. step out sampling, confirmation, and assessment sampling) and further drainage design work in this SOW, additional excavation of soils may be necessary. Additional excavation work would minimally result in additional monitoring work and possible testing. If during testing or monitoring, features are discovered, data monitoring will be necessary. These activities shall be considered optional work and the contractor shall provide labor rates and travel for this work (see Section 7.0).

The contractor will execute the mitigation fieldwork pursuant to the approved HPTP and MOA documents. All cultural resources documents and fieldwork shall be overseen by individuals satisfying the Secretary of Interior’s Professional Qualification Standards for Archaeology.

4-1 Memorandum of Agreement

The contractor will provide a proposal as to how assistance with the MOA will be provided to the BIA. This approach shall assume a minimum of 88 hours of staff time and assume: (1) participation in one site trip; (2) document reviews; (3) participation in one MOA development meeting at SCIP assuming that it takes place at a different time than the site visit;

(4) documentation of conference calls, the MOA development meeting, and the site visit through note taking; (5) developing handout and presentation materials; and (6) providing comments to stakeholder input and the draft MOA.

4-2 Historic Properties Treatment Plan

The contractor shall develop and complete the HPTP for the Site to address testing, data recovery, and monitoring associated with ground disturbance activities involved with the removal and disposal of PCB contaminated soils, javascript:__doPostBack('ctl00$ctl00$body$homebody$RecentDocuments$C$RecentDocumentsControl$RecentDocumentResults$ctl00$DocumentNumberLink','') contouring of the Yard for drainage, the construction of a concrete pad, and the construction of retention and catch basins.

Should features be identified, the contractor shall provide the technical approach to conducting additional testing. The HPTP shall provide for immediate excavation after testing. The HPTP shall include details for testing, data recovery and monitoring, a discovery plan, a plan of action developed in accordance with the Native American Graves Protection and Repatriation Act, and human remains protocols for private and State-owned land. The contractor shall submit an approach to data recovery involving the immediate excavation and removal of features. The contractor shall provide a technical approach and costs to remove and curate burial features. Data recovery needs to consider the existence of these potential features in PCB contaminated soils ranging from non-detect to 200 mg/kg.

Data recovery is considered optional work.

The HPTP shall include provisions for the communication of testing, monitoring, data recovery results (if applicable) with BIA staff. Minimally, the contractor will be required to provide brief weekly emails updating the status of archaeological related activities. In developing the HPTP, the HPTP shall include the following planning:

• Archaeological testing and reporting (See Task 4-3);

• Archaeological monitoring and reporting (See Task 4-4); and

• Safety and health provisions and protocols for working with soils with concentrations ranging from non-detect to 200 mg/kg (See Tasks 4-3 and 4-4 below).

4-3 Archaeological Testing, Fieldwork and Reporting

The contractor shall complete archaeological testing according to the final HPTP and below.

• Archaeological testing will be conducted in grid areas where the planned excavation will exceed two feet and in the retention basin areas. This testing will be conducted prior to the start of ground disturbance activities. The contractor shall determine the excavation process with the requirement that 5% of the areas greater than 2 feet in depth will be tested. If testing results indicate the discovery of features, data recovery will be necessary. Data recovery efforts shall proceed in accordance with the HPTP and be considered as optional work.

• Reporting shall minimally include a preliminary (end of field work) testing and data recovery memorandum, a full report on testing and data recovery, a preliminary (end of monitoring) memorandum, and a full report on monitoring.

• Safety and health provisions and protocols for working with soils during testing and features during data recovery with soils that contain PCB concentrations ranging from non-detect to 200 mg/kg. These protocols shall include how artifacts will be excavated and curated from these soils.

4-4 Archaeological Monitoring, Fieldwork and Reporting

The contractor shall complete archaeological monitoring according to the final HPTP and below.

• Archaeological monitoring shall occur during all soil removal activities. Archaeological monitoring costs shall be based on the contractor’s schedule for excavation work. Additional monitoring beyond that proposed by the contractor to oversee the excavation quantities provided in the SOW will be considered optional work.

• Reporting shall minimally include a preliminary (end of monitoring) memorandum and a full report on monitoring.

• Safety and health provisions and protocols for working with soils during testing and features during data recovery with soils that contain PCB concentrations ranging from non-detect to 200 mg/kg. These protocols shall include how artifacts will be excavated and curated from these soils.

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TASK 5: SITE PREPARATION

Prior to equipment mobilization for the proposed remedial activities, the contractor shall conduct site inspections, utility surveying, staking, vegetation removal, sampling,…