Exhibit_D_Rev_0_Chaquehui_South_Ancho_Lower_Water_CAAs.pdf

Exhibit D SOW Rev 0 March 20, 2019

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EXHIBIT D

STATEMENT OF WORK AND TECHNICAL SPECIFICATIONS

Implementation of the Investigation Work Plan for South Ancho Canyon Aggregate Area and

Implementation of the Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1 Implementation of the Investigation Work Plan for Lower Water/Indio Canyons Aggregate Area

1.0 PROJECT SCOPE OF WORK / BACKGROUND, GOALS, AND OBJECTIVES

This statement of work (SOW) establishes the scope for the SUBCONTRACTOR responsible for providing the technical functions and expertise necessary for the effective and timely delivery of products to the CONTRACTOR, Newport News Nuclear BWXT Los Alamos, LLC (N3B) Environmental Remediation (ER) Program. SUBCONTRACTOR must have in place the required and functioning management, technical and administrative infrastructure to complete all objectives of this SOW and provide successful coordination with N3B personnel. SUBCONTRACTOR shall perform all work requirements in accordance with the Subcontract documents, New Mexico Environment Department (NMED), and U.S. Department of Energy (DOE) policies and directives as specified herein.

In the performance of this SOW, SUBCONTRACTOR shall comply with all applicable laws, DOE orders, CONTRACTOR performance requirements, CONTRACTOR implementation requirements, N3B requirements, the NMED Compliance Order on Consent (hereafter, the Consent Order), CONTRACTOR Conduct of Operations, quality requirements as stated in Exhibit H, safety requirements in Exhibit F, security requirements in Exhibit G, the integrated work document/management process and requirements as specified herein.

SUBCONTRACTOR shall furnish qualified management, personnel, equipment, materials, supplies and facilities to perform, as detailed in this Exhibit D, all work necessary to execute this SOW. The goal of this work is to complete the site characterization, environmental remediation, and investigation reporting at the South Ancho Canyon Aggregate Area and the Chaquehui Canyon Aggregate Area, both located in Technical Area (TA) 33, and the Lower Water/Indio Canyons Aggregate Area, located in TA-15. Based on the site operational history and available analytical data, beryllium concentrations above background values (BVs) may be present in soil and tuff at TA-33 and TA-15. Because of the potential for exposure to beryllium-contaminated soil and tuff, SUBCONTRACTOR shall be enrolled in and follow the requirements set forth in the CONTRACTOR Chronic Beryllium Disease Prevention Program (draft included in Exhibit F).

To execute this work, the SUBCONTRACTOR shall perform all characterization sampling; drilling;

excavation; remediation; geodetic, geophysical, and radiological surveys; high explosives (HE) screening;

drilling and vapor monitoring well installation, if required; waste packaging and staging; waste sampling (in coordination with the N3B Waste Management Coordinator (WMC); site stabilization and restoration; and investigation report writing for each for each Solid Waste Management Unit (SWMU) or Area of Concern (AOC) as detailed in this Exhibit D and the NMED approved Investigation Work Plans (IWPs) for the South Ancho Canyon Aggregate Area, the Chaquehui Canyon Aggregate Area, and the Lower Water/Indio Canyons Aggregate Area (Appendices D-1, D-2, and D-3). Revisions to the analytical data tables and sample locations in the documents referenced above are addressed in this Exhibit D and captured in the revised Analytical Data Table, Figures, and Sample Location Coordinates for each Aggregate Area (Appendices D-4, D-5, and D-6). Appendices D-4, D-5, and D-6 shall be used to guide all characterization and confirmation sampling.

In addition to performing the work prescribed in the IWPs and accompanying documents, the SUBCONTRACTOR shall evaluate the analytical data collected from South Ancho Canyon, Chaquehui Canyon, and Lower Water/Indio Canyons Aggregate Areas and make recommendations if additional sampling and/or remediation are required to complete characterization of the sites. SUBCONTRACTOR

Exhibit D SOW Rev. 0 March 18, 2019

RFP-0000297 Page 2 of 29 shall prepare data action summary reports and present the findings and recommendations for each AOC and SWMU to the CONTRACTOR in peer review meetings (see section 1.4 for details).

Following the data decision peer review meeting, SUBCONTRACTOR shall plan for and perform the additional characterization sampling and/or remediation, waste packaging and sampling, and human health and ecological risk assessments necessary to complete characterization of each Aggregate Area.

SUBCONTRACTOR shall prepare the Investigation Reports (IR) and comment resolution necessary to meet Consent Order requirements and deliverable deadlines. One IR each shall be completed and submitted to CONTRACTOR for the South Ancho Canyon Aggregate Area, the Chaquehui Canyon Aggregate Area, and the Lower Water/Indio Canyons Aggregate Area. To meet Consent Order requirements, all characterization and remediation field work at TA-33 and TA-15 shall be prioritized such that the IR for Chaquehui Canyon Aggregate Area is completed and submitted as final to N3B by June 5, 2020, the IR for South Ancho Canyon Aggregate Area is completed and submitted as final to N3B by July 10, 2020 and the IR for Lower Water/Indio Canyons Aggregate Area is completed and submitted as final to N3B by September 4, 2020. A Field Summary Report shall be completed for each Aggregate Area and submitted 30 days after completion of field work. Field work shall not be scheduled during the LANL holiday closure or any other observed holidays.

Activities to support on-going work includes demarcating and establishing work area boundaries;

stormwater pollution prevention controls utilization and maintenance; Industrial Hygiene (IH) personnel and environmental monitoring; waste loading and staging; sample planning and management; evaluation of sample data; excavation permitting; adhering to access agreements, operational control agreements (OCAs) and plan of the day (POD)/plan of the week (POW) operations; training requirements; and final site turnover. SUBCONTRACTOR shall not be relieved of performing the details of any work, manifestly or customarily performed to carry out the intent of this subcontract. All work shall be performed fully and correctly as set forth and described in the subcontract outlined in detail in section 1.1 “Work Scope” and the following Appendices:

D-1 Investigation Work Plan for South Ancho Canyon Aggregate Area and Approval with Modifications for the 2015 Investigation Work Plan for South Ancho Canyon Aggregate Area;

D-2 Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1, Response to the Notice of Disapproval for the Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1, and Notice of Approval with Modifications for the Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1;

D-3 Investigation Work Plan for Lower Water/Indio Canyons Aggregate Area, and Approval with Modifications Investigation Work Plan for Lower Water/Indio Canyons Aggregate Area;

D-4 Revised South Ancho Canyon Aggregate Area Analytical Samples Table, Figures, and Sample Location Coordinates;

D-5 Revised Chaquehui Canyon Aggregate Area Analytical Samples, Figures, and Sample Location Coordinates;

D-6 Revised Lower Water/Indio Canyons Aggregate Area Analytical Samples, Figures, and Sample Location Coordinates;

D-7 Construction General Permit (CGP);

D-8 Waste Characterization Strategy Forms (WCSF);

D-9 Training Requirements Matrix;

D-10 N3B Policies, Procedures and Standard Operation Procedures;

D-11 New Mexico Environmental Departments Compliance Order of Consent;

D-12 Supplemental Investigation Report for Threemile Canyon Aggregate Area, Revision 1, July

2018 Reporting Template/Example;

D-13 Request for Information (RFI) form;

D-14 Subcontractor Deviation Disposition Request (SDDR) form;

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D-15 Project Review Process Procedure (PRPP) for Chaquehui Canyon Aggregate Area and South Ancho Canyon Aggregate Area;

D-16 Assessment Guidance for Site Investigations and Remediation;

D-17 Earth Moving Specification and Seeding Specification listed in this document;

D-18 N3B Subcontractor Submittal/Transmittal Form;

D-19 Energy Solutions WAC

PROJECT LOCATION AND BACKGROUND – TA-33 and TA-15

All sites included in this Exhibit D are located within the Los Alamos National Laboratory (LANL) site boundary and are in TA-33 or TA-15.

TA-33 is located on the Lower Pajarito Plateau in the southeastern corner of the Laboratory and occupies approximately 1000 acres. TA-33 is used for experimental research activities that support the creation, delivery, and maintenance of innovative detection and energy-projection systems for remote applications in space and around the world. The structures at TA-33 are located on the mesa top that is bounded by Ancho Canyon to the north and by Chaquehui Canyon to the south. TA-33 includes both uncleared and Q-cleared work areas.

The South Ancho Canyon Aggregate Area encompasses the area drained by Ancho Canyon. South Ancho Canyon Aggregate Area includes a total of 11 SWMUs and one AOC. Historical details of previous investigations and data for these sites are provided in the historical investigation report (HIR) for the South Ancho Canyon Aggregate Area. Of these 12 sites, one has been previously investigated and/or remediated and approved for No Further Action (NFA) and is excluded from this Exhibit D. The remaining 11 require characterization or remediation and are included in this Exhibit D.

The Chaquehui Canyon Aggregate Area includes a total of 51 SWMUs and one AOC. Historical details of previous investigations and data for these sites are provided in the HIR for the Chaquehui Canyon Aggregate Area. Of these 51 sites, eight have been previously investigated and/or remediated and approved for NFA and are excluded from this Exhibit D. The remaining 43 require characterization or remediation and are included in this Exhibit D.

TA-15, also known as R-Site, occupies portions of Threemile Mesa on the Pajarito Plateau near the southwestern boundary of the LANL. TA-15 occupies approximately 1200 acres and is used for HE research, development, and testing, primarily through hydrodynamic testing and dynamic experimentation.

TA-15 contains the Pulsed High-Energy Radiographic Machine Emitting X-rays (PHERMEX) facility and the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility, both of which are or were formerly used for testing weapons under development. All work performed at TA-15 requires a Q clearance or a security escort.

The Lower Water/Indio Canyons Aggregate Area includes three SWMUs and eight AOCs located in TA-15 and TA-49. Of these 11 sites, five were previously investigated and are excluded from this Exhibit D. The remaining six (all located near PHERMEX at TA-15) require characterization or remediation and are included in this Exhibit D.

A mandatory site visit to the uncleared sites will be scheduled coincident with release of the Request for Proposal (RFP) to provide the SUBCONTRACTOR with additional logistical information and the opportunity for scoping clarification. Scoping clarification not addressed during the site visit must be submitted in writing to N3B the following business day.

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BASE SCOPE

1.1 Work Included — South Ancho Canyon Aggregate Area Work Plan Implementation

1.1.1 SUBCONTRACTOR shall implement all investigation and remediation activities specified in the approved Investigation Work Plan for South Ancho Canyon Aggregate Area, Notice of Approval with Modifications for the 2015 Investigation Work Plan for South Ancho Canyon Aggregate Area, and revised South Ancho Canyon Aggregate Area Analytical Samples Table, Figures, and Sample Location Coordinates (Appendices D-1 and D-4).

1.1.2 SUBCONTRACTOR shall perform soil and tuff characterization sampling following the guidance set forth in Appendices D-1 and D-4, and documents cited in 2.1 for the following sites: SWMU 33-006(b), SWMU 33-007(a), SWMU 33-008(b), SWMU 33-010(a), SWMU 33-010(b), SWMU 33-010(d), and AOC C-33-002.

1.1.3 SUBCONTRACTOR shall perform drilling and sampling, remediation activities, and characterization/confirmation sampling in accordance with Appendices D-1 and D-4 and documents cited in 2.1 as described below.

1.1.3.1 Site characterization of SWMU 33-003(a): To determine the nature and extent of contamination, 49 samples will be collected from seven boreholes. Each borehole will be drilled to a minimum depth of 60 ft bgs. Characterization samples will be collected from 0-1 ft bgs, 9-10 ft bgs, 19-20 ft bgs, 29-30 ft bgs, 39-40 ft bgs, 49-50 ft bgs, and 59-60 ft bgs, at each location (see Appendix D-4). The anticipated volume of waste and materials is approximately 10 cubic yards of low-level drill cuttings.

1.1.3.2 Site characterization for SWMU 33-003(b): To determine the nature and extent of contamination, 56 samples will be collected from eight boreholes. Each borehole will be drilled to a minimum depth of 60 ft bgs. Characterization samples will be collected from 0-1 ft bgs, 9-10 ft bgs, 19-20 ft bgs, 29-30 ft bgs, 39-40 ft bgs, 49-50 ft bgs, and 59-60 ft bgs at each location (see Appendix D-4). The anticipated volume of waste and materials is approximately 12 cubic yards of low-level drill cuttings.

1.1.3.3 Trenching activities at SWMU 33-004(k): Two trenches will be excavated on both sides of the access road to verify if the drainline exists. If the drainline is not located, no samples will be collected at this site, and the conclusion will be the drainline was never installed. If the drainline is located, sample locations will be targeted at the locations of the drainline and outfall to define the nature and extent of contamination following Appendix D-4. If the drainline is located, the anticipated volume of waste and material is approximately 15 cubic yards of low-level soil. If the drainline is not located, the material will be used to backfill the trenches.

1.1.3.4 Removal of a 768 gal. capacity septic tank and its contents at SWMU 33-004(c):

Soil, fill, or other material covering the septic tank will be excavated and containerized for disposal in N3B-supplied waste containers. Once exposed, the location of the septic tank and its dimensions will be surveyed. The contents will be sampled by SUBCONTRACTOR to determine the nature of the contents and for waste characterization. The inlet and outlet drainlines to the tank will be plugged.

Sampling locations will be targeted at the locations of the septic tank, inlet and outlet drainlines, and leach field to define the nature and extent of contamination following Appendix D-4. Additional material beneath the septic tank may be excavated if any staining is noted and pending analytical data results. The anticipated volume of

RFP-0000297 Page 5 of 29 waste and material is approximately 5 cubic yards of low-level debris and 20 cubic yards of low-level soil.

1.2 Work Included — Chaquehui Canyon Aggregate Area Work Plan Implementation

1.2.1 SUBCONTRACTOR shall implement all investigation and remediation activities specified in the approved Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1, Response to the Notice of Disapproval for the Investigation Work Plan for Chaquehui Canyon Aggregate Area, Revision 1, Notice of Approval with Modifications for the Investigation Work Plan for Chaquehui Canyon Aggregate Area, and Revised Chaquehui Canyon Aggregate Area Analytical Samples, Figures, and Sample Location Coordinates (Appendices D-2 and D-5).

1.2.2 SUBCONTRACTOR shall perform investigation and characterization sampling activities for SWMU 32-002(a-c), SWMU 32-002(d), SWMU 32-002(e), SWMU 33-004(a), SWMU 33- 004(h), SWMU 33-004(i), SWMU 33-011(d), SWMU 33-017, SWMU 33-005(a-c), SWMU 33-011(a), SWMU 33-011(e), SWMU 33-012(a), SWMU 33-016, AOC C-33-001, AOC C- 33-003, SWMU 33-004(g), SWMU 33-007(c), SWMU 33-009, SWMU 33-001(a-e), SWMU 33-004(j), SWMU 33-010(c), SWMU 33-010(g), SWMU 33-010(h), SWMU 33-007(b), SWMU 33-011(c), SWMU 33-014, SWMU 33-004(m), and AOC 33-011(b), as specified Appendices D-2 and D-5 and documents cited in 2.1 as described below. If encountered during characterization sampling, any remaining surface debris from SWMUs 33-010(c), 33-010(g), and 33-010(h) including copper and aluminum shrapnel, pieces of electronic cable, and wood debris from former firing site activities will be removed and packaged for disposal.

1.2.3 SUBCONTRACTOR shall perform drilling and sampling, remediation activities, and characterization and confirmation sampling in accordance with Appendices D-2 and D-5 and documents cited in 2.1 as described below.

1.2.3.1 At SWMU 33-004(a), Collect 10 samples from 0-1 ft and 3-4 ft beneath the septic structures at five locations to characterize current conditions of the septic system.

Collected 14 samples from two 70 ft deep boreholes. Samples from the 70 ft borings will be collected every 10 ft. Collect 24 samples from 0-1 ft, 2-3 ft, and 4-5 ft below pipe joints at eight locations beneath the bottom of the drainfield vitrified clay pipe (VCP). At each location, the VCP drain pipe will be exposed and samples will be collected below the pipe joints.

1.2.3.2 At SWMU 33-001(a-e), MDA E, Collect 35 samples from five 70 ft deep boreholes Samples will be collected every 10 ft from the borings.

1.2.3.3 SWMU 33-010(f) – This SWMU consists of two small surface disposal areas approximately 50 ft apart and located 300 ft southeast of former building 33-0086.

Materials at the site included pieces of concrete; piles of tuff and cured asphalt;

rusted metal cans, rebar, and strapping bands; and other debris. Prior to remediation, the analytical confirmation samples shall be collected to characterize the waste from SWMU 33-010(f). Thirty confirmation samples will be collected from 0-1 ft bgs, 2-3 ft bgs, and 4-5 ft bgs at 10 locations. Following characterization, any debris remaining at the SWMU 33-010(f) surface disposal area will be removed and containerized for disposal in accordance with the WCSF (Appendix D-8). The anticipated waste and material volumes are approximately 60 cubic yards (each) of low-level nonhazardous debris and soil.

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1.2.3.4 SWMU 33-015 – This SWMU consists of a small (approximately 4 ft x 4 ft x 6ft) incinerator mounted on a concrete base that is no longer used. The incinerator and the concrete will be removed and packaged for disposal. Following removal, 15 samples will be collected from 0-1 ft bgs, 2-3 ft bgs, and 4-5 ft bgs to define the N&E of contamination associated with the incinerator. The anticipated waste and material volume is 10 cubic yards of non-hazardous debris.

1.2.3.5 AOC 33-008(c) – Any debris in the watercourse and surface areas of the site exposed since 1999 will be removed and containerized for disposal. Following the debris removal, 12 extent samples from 0-1 ft bgs and 5-6 ft bgs will be collected form six locations. In the culvert area, 30 extent samples from 0-1 ft bgs, 5-6 ft bgs, and 9-10 ft bgs will be collected from 10 locations. The anticipated waste and material volume is approximately 0.3 cubic yards of low-level debris.

1.2.3.6 SWMU 33-004(d) – The septic tank is no longer needed; therefore, the septic tank (including its contents) will be removed and containerized for disposal. The septic tank drainlines will be plugged. Following removal of the septic tank, eight samples will be collected from 0-1 and 3-4 ft beneath the structures at four locations. Six samples will be collected from 4-5 ft bgs, 7-8 ft bgs, and 9-10 ft bgs at two former sample locations in the drainline. Sixteen samples will be collected from 0-1 ft bgs and 2-3 ft bgs at 8 locations in the outfall and drainage. The anticipated waste is four cubic yards of non-hazardous debris.

1.2.3.7 SWMU 33-004(b) – The septic tank (including any contents) will be characterized, excavated, and containerized for disposal. The inlet and outlet drainlines will be plugged. Following removal of the septic tank, the excavated area will be surveyed for radiation and HE (TNT and RDX using ENSYS field test kits). Additional material beneath the septic tank may be excavated based on field screening results or if any staining is noted. Previous samples collected indicated detected cyanide in tank sediment and surrounding soil. Following removal, 12 confirmation samples from 0-1 ft bgs and 3-4 ft bgs will be collected from six locations near the tank. Six samples will be collected from 0-1 ft bgs and 2-3 ft bgs at three locations in the drainage. The anticipated waste is five cubic yards of hazardous debris and 20 cubic yards of hazardous soil.

1.2.3.8 SWMU 33-006(a) – Any firing site debris observed within the proposed sampling area will be flagged and subsequently removed, containerized, and characterized for disposal. The location where debris is removed will be field screened for radioactivity and HE (TNT and RDX using ENSYS field screening test kits); any soil with gross radioactivity detected above BVs or with detected HE will be excavated. Confirmation samples will be collected from two depths (0 to 1 ft bgs and 2 to 3 ft bgs) in the bottom of any excavation. Four samples from 0-1 ft bgs and 2-3 ft bgs will be collected at two locations within the shot pad. Sixteen samples from 0-1 ft bgs and 2-3 ft bgs will be collected at eight locations around the former shot pad and at step-out locations. The anticipated debris volume is approximately 0.05 yd3 (10 gal.

bucket) of mixed debris.

1.2.3.9 SWMU 33-008(a) – This site is a landfill created in 1984 during the cleanup of the TA-33 firing sites. Historical information indicates that the landfill dimensions are approximately 50 ft × 60 ft × 8 ft deep. Preliminary site activities will include a surface radiological survey and geophysical surveys (magnetometry, electromagnetic [EM], and resistivity), followed by the excavation of test pits and trenches to locate and

RFP-0000297 Page 7 of 29 define the landfill boundaries. Once located, all visible waste and stained soil and/or tuff will be removed from the landfill and the bottom and sides of the excavation will be screened for radiation and HE (TNT and RDX using ENSYS field screening test kits). Additional media will be excavated until field-screening results indicate no detected HE and no elevated gross radiation above background. Twelve confirmation samples from 0-1 ft bgs and 4-5 ft bgs at six locations will be collected from the bottom of the landfill to determine vertical extent. Sixteen samples from 4-5 ft bgs and 9-10 ft bgs at eight locations will be collected to determine lateral extent. The anticipated waste and material volumes are approximately 600 cubic yards of non-hazardous debris and 60 cubic yards of low-level non-hazardous soil.

1.3 Work Included — Lower Water/Indio Aggregate Area Work Plan Implementation

1.3.1 SUBCONTRACTOR shall implement all investigation and remediation activities specified in the approved Investigation Work Plan for Lower Water/Indio Canyons Aggregate Area, Notice of Approval with Modifications for the Investigation Work Plan for Lower Water/Indio Canyons Aggregate Area, and Revised Lower Water/Indio Canyons Aggregate Area Analytical Table, Figures, and Sample Location Coordinates (Appendices D-3 and D-6).

1.3.2 SUBCONTRACTOR shall perform investigation and characterization sampling and HE field screening activities for AOC 15-001, AOC 15-004(h), AOC 15-014(d), SWMU 15-014(l), and AOC C-15-011, as specified Appendices D-3 and D-6 and documents cited in 2.1 as described below.

1.3.3 SUBCONTRACTOR shall perform remediation activities, HE field screening, and characterization/confirmation sampling in accordance with Appendices D-3 and D-6 and documents cited in 2.1 as described below.

1.3.3.1 SWMU 15-009(g) – This site consists of an inactive septic system at the PHERMEX facility. The system includes a 605 gal. 4 ft x 8 ft x 5 ft reinforced concrete septic tank, leach field, and inlet and outlet drainlines. If the septic tank can be released as being free of HE, the septic tank and its contents will be removed and disposed of. If any staining or other indication of contamination below the septic tank exists, soil beneath the septic tank will be excavated. If the tank cannot be released as free of HE, the contents will be removed and the tank will be closed by plugging the inlet and outlet and filling the tank with concrete or flowable fill. Once exposed, the location of the septic tank and its dimensions will be surveyed. The septic tank contents will be sampled for waste characterization. Exploratory trenches will be dug using a track excavator or backhoe to locate the drainlines in the leach field at SWMU 15-009(g). Site characterization will be performed following tank removal or closure. Twenty-four samples will be collected from eight locations adjacent to the inlet drainlines, including locations where drainlines from the buildings join. Twenty-one samples will also be collected from seven locations around the leach filed boundary. All samples will be collected form three depths (0-1 ft, 2-3 ft, and 5-6 ft) below the structures. After completion of sampling, the excavation and/or trenches will be backfilled with clean fill. Anticipated waste is five cubic yards of hazardous debris and 20 cubic yards of hazardous soil.

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1.3.4 The following assumptions are valid for sections 1.1, 1.2, and 1.3.

1.3.4.1 SUBCONTRACTOR shall schedule work based on standard turn-around times for the analysis required (see Appendices D-1, D-2, and D-3 Work Plans and D-4, D-5, and D-6 Analytical Data Tables, Figures, and Sample Location Coordinates).

1.3.4.2 SUBCONTRACTOR shall be responsible for sampling, prior to the start of any field activities and throughout the project, as necessary, for occupational worker safety and health, Industrial Hygiene (IH) and worker protection per Exhibit F and the N3B Chronic Beryllium Disease Prevention Program. SUBCONTRACTOR shall evaluate if fall protection is required to access sample locations located on steep slopes per Exhibit F.

1.3.4.3 SUBCONTRACTOR shall sample project-generated waste, in accordance with the approved WCSF and applicable EPA methods prior to generating waste, if required (see Exhibit F and Appendix D-8 WCSF).

1.3.4.4 If abandoned in place, SUBCONTRACTOR shall properly close all permitted septic tanks in accordance with the requirements of section 20.7.3.307 of the New Mexico Administrative Code (NMAC) and take photographs to document the closure in accordance with the requirements.

1.3.4.5 SUBCONTRACTOR shall perform geodetic surveys of all sampling locations, excavation boundaries, septic tanks, landfill boundaries, excavation boundaries and locations of debris, where applicable.

1.3.4.6 SUBCONTRACTOR shall provide sample management for all samples collected as part of the investigations at TA-33 and TA-15, including generating sample collection logs and chain-of-custody documentation; generating and updating a samples taken table; and providing updated sample location coordinates if locations are moved based on field conditions.

1.3.4.7 SUBCONTRACTOR shall maintain sample custody and provide transportation of the samples to the N3B Sample Management Office (SMO). Off-site laboratory analytical costs associated with the sampling activities will be the responsibility of

CONTRACTOR.

1.3.4.8 SUBCONTRACTOR shall be responsible for installing CONTRACTOR provided bin liners. SUBCONTRACTOR shall provide and place zeolite absorbent in containers if there is potential for moisture in media that could result in free liquids in the waste container.

1.3.4.9 After initial mobilization of waste containers provided by CONTRACTOR, SUBCONTRACTOR shall provide all intra-site transportation of waste containers (to include bin pick-up, staging, weighing (pre-and post loading) on SUBCONTRACTOR provided scale) to CONTRACTOR designated waste staging area. SUBCONTRACTOR shall also provide intra-site transportation of other waste containers that may include drums, B-12 or B-25 boxes, 1 cubic yard bags and pallets, and 5 cubic yard bags and pallets.

1.3.4.10 SUBCONTRACTOR shall, in accordance with Exhibit F, provide all Personal Protective Equipment (PPE) to perform this statement of work (e.g. hard hats, RFP-0000297 Page 9 of 29 safety glasses, protective footwear, high visibility vests, gloves, booties, respirators, if needed, coveralls, etc.).

1.3.4.11 If asbestos containing material is encountered during remediation activities, SUBCONTRACTOR shall perform asbestos sampling and abatement per applicable regulations. SUBCONTRACTOR shall package and load materials into CONTRACTOR supplied containers.

1.3.4.12 All penetrations made through asphalt or concrete for samples shall be patched with like material when completed.

1.3.4.13 Sample locations are approximate and may be moved 5 ft or more with written Field Execution Technical Lead (FETL) approval to meet the requirements and intent of the IWPs and to avoid building footers, buried utilities, or other obstructions.

1.3.4.14 All sample locations that deviate from the IWP and this Exhibit D shall be field validated by the N3B FETL prior to sampling.

1.3.4.15 Electronic files of all sample and borehole location coordinates will be provided to the SUBCONTRACTOR upon request.

1.3.4.16 Where soil beneath a drainline is sampled and trenching is not prescribed in the IWP, SUBCONTRACTOR shall pothole to locate the drainline prior to sampling.

1.3.4.17 All boreholes will be abandoned following Monitoring Well and Borehole Abandonment SOP (Appendix D-10) after a review of analytical data is conducted and it is determined that no additional, deeper samples need to be collected.

1.3.4.18 All excavations and remediations will be backfilled with clean fill and stabilized after a review of analytical data is conducted and it is determined that no additional characterization samples are required (see section 2.4.25).

1.3.4.19 All open excavations and boreholes will be protected by barricades prior to backfilling (see section 2.4.21).

1.3.4.20 X-ray fluorescence (XRF) screening for metals is not required.

1.3.4.21 For waste disposal purposes, SUBCONTRACTOR shall collect one soil compaction sample (ASTM D698) for TA-33 on one soil compaction sample for TA-15. Sample shall be collected in a 5-gallon bucket and submitted to the SMO for sample processing.

1.4 Data/Action Summary Reports and Investigative Reports

1.4.1 Conduct Data Assessments and Prepare Data/Action Summary Reports and presentations for each AOC and SWMU in the South Ancho Canyon Aggregate Area, the Chaquehui Canyon Aggregate Area, and the Lower Water/Indio Canyons Aggregate Area.

1.4.1.1 SUBCONTRACTOR shall request and ensure they receive data pulls for sample delivery groups as they become available from the N3B data steward by sending a data request by email to the FETL and N3B data steward that includes a complete list of sites, sampling plan, event IDs, location IDs, and sample IDs. Preliminary

RFP-0000297 Page 10 of 29 and final data pulls will take a minimum of 30 calendar days to complete and this duration must be incorporated into the project schedule.

1.4.1.2 For each AOC and SMWU, identify Chemicals of Potential Concern (COPCs), determine nature and extent of contamination (N&E), and provide human health and ecological risk assessments in accordance with N3B-SOP-ER-2004 R 0, N3B- SOP-ER-2005 R 0, and N3B-SOP-ER-2009 R 0 provided in Appendix D-10.

1.4.1.3 Identification of COPCs for inorganic chemicals and radionuclides involves background comparisons using media-specific BVs and fallout values from “Inorganic and Radionuclide Background Data for Soils, Canyon Sediments, and Bandelier Tuff at Los Alamos National Laboratory (LANL 1998, 059730). Statistical methods are used to determine if a COPC is different from background.

1.4.1.4 Identification of COPCs for organic chemicals is based on detection status.

1.4.1.5 Determine if N&E of contamination is defined for each COPC at each AOC and SWMU. In general, both laterally and vertically decreasing concentrations are used to define extent.

1.4.1.6 For each AOC and SMWU, if N&E is not defined, provide recommendations for additional sampling required to define N&E.

1.4.1.7 For each AOC and SWMU, calculate exposure point concentrations for each COPC, site, and scenario combination (0-1 ft bgs for industrial, 0-5 ft bgs for ecological, 0-10 ft bgs for residential and construction worker) using the U.S.

Environmental Protection Agency (EPA) ProUCL program.

1.4.1.8 For each AOC and SWMU, determine if remediation is required based on the results of the industrial and ecological risk assessments.

1.4.1.9 Prepare data/action summary reports by SWMU/AOC and present summary reports, findings, and recommendations at CONTRACTOR data decision peer review meetings. The reports shall include proposed decisions or actions required to provide complete characterization and/or risk-driven remediation at each SWMU/AOC for each Aggregate Area. These reports and the decision peer review meetings will be ongoing throughout the duration of the field effort and occur for one site or multiple sites, depending on data availability.

1.4.1.10 Summary analytical data tables and associated maps and figures with collected sample locations and proposed sample locations shall be included in the data/action summary report.

1.4.1.11 A summary of the decisions and proposed sampling and/or remediation to complete site characterization for each AOC or SMWU shall be submitted to the FETL within 2 calendar days after each meeting date.

1.4.1.12 Additional sampling or remediation work, if necessary, is SUBCONTRACTOR’S responsibility to complete.

1.4.1.13 Following CONTRACTOR data decision peer review meeting(s), plan for and collect additional samples at locations within the South Ancho Canyon Aggregate

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Area, Chaquehui Canyon Aggregate Area, and/or Lower Water/Indio Canyons Aggregate Area that need further characterization based on analytical data results from samples collected during the initial stage of sampling and the data/action summary reports results. Sampling may be required at existing locations (additional depths) or new locations throughout the project area to finalize nature and extent determinations.

1.4.1.14 Following CONTRACTOR data decision peer review meeting(s), plan for and remediate additional areas or sites within the South Ancho Canyon Aggregate Area, Chaquehui Canyon Aggregate Area, and or Lower Water/Indio Canyons Aggregate Area that exceed risk-based screening levels for ecological risk and/or the Industrial scenario. Confirmation samples will also be collected after excavations are complete to ensure risk-based cleanup levels are achieved.

1.4.1.15 SUBCONTRACTOR shall ensure that any changes made in the field (i.e.

excavated samples) are included on the original sample collection log and the CONTRACTOR is notified to update EIM.

1.4.1.16 For AOCs and SWMUs that require addition characterization or remediation, repeat the process of preparing a data/action summary report by SWMU/AOC and present summary report, findings, and recommendations at the CONTRACTOR data decision peer review meeting(s).

1.4.1.17 SUBCONTRACTOR shall ensure characterization sampling and remediation are complete and all TA-33 and TA-15 SWMUs and AOCs can be recommended for Certificate of Completion with or without controls, or deferred status in the Investigation Reports (see section 1.4.2 below).

1.4.2 Prepare Investigation Reports for all Consent Order work defined in this SOW, in accordance with the June 2016 Compliance Order on Consent and NMED Risk Assessment Guidance for Site Investigations and Remediation (February 2019 or latest version for Volume I). One IR will be completed for the Chaquehui Canyon Aggregate Area, one IR will be completed for the South Ancho Canyon Aggregate Area, and one IR will be completed from the Lower Water/Indio Canyons Aggregate Area. SUBCONTRACTOR shall use Appendix D-12 “Supplemental Investigation Report for Threemile Canyon Aggregate Area, Revision 1, July 2018” as an IR template. Each IR should be prepared in the same manner, text and format as the Threemile SIR;

1.4.2.1 SUBCONTRACTOR scope is not complete until IRs are approved by N3B, DOE and

NMED.

1.4.3 For Chaquehui Canyon Aggregate Area, SUBCONTRACTOR shall prepare and submit a 30% IR draft, a 60% IR draft, and the 95% peer review draft.

1.4.3.1 The 30% draft shall include the document outline and Sections 1-5 complete. The 30% draft is due to the FETL on or before December 6, 2020.

1.4.3.2 The 60% draft shall include the 30% draft and shall also analyze sampling data, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, and include present-day human and ecological health risk assessments for at least 20 AOCs or

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SWMUs completed. The 60% draft is due to the FETL on or before February 14, 2020.

1.4.3.3 The 95% peer review draft shall analyze sampling data for all 43 AOCs or SMWUs, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, present human and ecological health risk assessments for each site, and ensure all sites within the Aggregate Area are recommended for Certificate of Completion with or without controls, or deferred status. The 95% draft is due to the FETL on or before May 8, 2020.

1.4.4 For South Ancho Canyon Aggregate Area, SUBCONTRACTOR shall prepare and submit a 30% IR draft, a 60% IR draft, and the 95% peer review draft.

1.4.4.1 The 30% drafts shall include the document outline and Sections 1-5 complete. The 30% drafts are due to the FETL on or before February 7, 2020.

1.4.4.2 The 60% draft shall include the 30% draft and shall also analyze sampling data, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, present human and ecological health risk assessments for at least five AOCs or SWMUs completed for South Ancho Canyon Aggregate Area. The 60% draft is due to the FETL on or before April 10, 2020.

1.4.4.3 The 95% peer review draft shall analyze sampling data for all 11 AOCs or SWMUs, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, present human and ecological health risk assessments for each site, and ensure all sites within the Aggregate Area are recommended for Certificate of Completion with or without controls, or deferred status. The 95% draft is due to the FETL on or before June 12, 2020.

1.4.5 For Lower Water/Indio Canyons Aggregate Area, SUBCONTRACTOR shall prepare and submit a 30% IR draft, a 60% IR draft, and the 95% peer review draft.

1.4.5.1 The 30% draft shall include the document outline and Sections 1-5 complete. The 30% draft is due to the FETL on or before March 13, 2020.

1.4.5.2 The 60% draft shall include the 30% draft and shall also analyze sampling data, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, and include present-day human and ecological health risk assessments for at least three AOCs or SMWUs. The 60% draft is to the FETL due on or before May 8, 2020.

1.4.5.3 The 95% peer review draft shall analyze sampling data for all six AOCs and SWMUs, incorporate field operations data, present data in tables and figures, present the COPCs, discuss the nature and extent of contaminants at each site, present human and ecological health risk assessments for each site, and ensure all sites within the Aggregate Area is recommended for Certificate of Completion with or without controls, or deferred status. The 95% draft is due to the FETL on or before August 7, 2020.

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1.4.6 The following assumptions are valid for section 1.4.

1.4.6.1 Decision-level analytical data previously collected may be evaluated and included in the IR, if applicable. All data collected in support of the investigations of SWMU’s and AOC’s detailed in this Exhibit D will be included in the IRs.

1.4.6.2 CONTRACTOR will provide SUBCONTRACTOR prior investigation reports as needed, in Microsoft Word or .pdf format. Plates will be provided as .pdf files.

1.4.6.3 SUBCONTRACTOR shall submit coordinates for sampling locations to the SMO for upload before requesting analytical data for reporting. All spatial data must be collected using the laboratory standard State Plane Coordinate System, New Mexico, Central Zone, US Feet, North American Datum 1983.

1.4.6.4 SUBCONTRACTOR shall request and ensure it receives a final data pull at the conclusion of the analytical effort. SUBCONTRACTOR shall request from CONTRACTOR any and all focused validations required for questionable analytical results and do so in a way that minimally impacts the project schedule.

1.4.6.5 Map products and spatial data development must be completed using Environmental Systems Research Institute (ESRI) ArcGIS or Autodesk AutoCAD MAP products.

SUBCONTRACTOR is responsible for the production of any required maps utilizing the ER GIS spatial database for existing base data. Any spatial data represented in map products that did not originate from, or is a modification of, spatial features in the CONTRACTOR’s ER GIS spatial database, must be submitted in ESRI Shapefile/Geodatabase or AutoCAD DXF/DWG format to CONTRACTOR’s ER GIS personnel at the time of report or revision completion.

1.4.6.6 SUBCONTRACTOR shall provide final editing, compositing, and production of the IR with minimal assistance from CONTRACTOR.

1.4.6.7 SUBCONTRACTOR shall participate in a formal peer review in accordance with N3B-EM-AP-10088, “Peer Review of Environmental Programs Documents.” Peer reviewers will review the document and provide comments (see section 1.4.7). This activity includes providing electronic files of the peer review draft in the format specified in section 3.2 and 3.3 of this statement of work.

1.4.6.8 SUBCONTRACTOR shall prepare data tables in the main text to include current SSLs/SALs and include footnotes accordingly.

1.4.6.9 SUBCONTACTOR shall incorporate new requirements from NMED guidance documents. This may include revisions to SSLs in Sample Identification Detect (SID) tables, updates and changes.

1.4.6.10 SUBCONTRACTOR shall present Human Health and Ecological Risk Assessments for each site.

1.4.6.10.1 SUBCONTRACTOR shall conduct site visits and prepare Ecological Scoping Checklists for each SWMU/AOC. Checklists can be combined if the form of the site releases is similar. The checklists shall be included as an attachment to the risk assessment appendix.

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1.4.6.10.2 SUBCONTRACTOR shall provide ProUCL calculations, including input and output files for each site and scenario as an attachment to the risk assessment appendix.

1.4.6.10.3 SUBCONTRACTOR shall provide calculations of dioxin- and furan-equivalent concentrations for each site and scenario, as appropriate, as an attachment to the risk assessment appendix.

1.4.6.10.4 SUBCONTRACTOR shall incorporate new requirements from NMED guidance documents. This may include revisions to risk tables (new SSLs/SALs and ensuring COPCs with both carcinogenic and non-carcinogenic effects are in both tables for a scenario), recalculations of risks, and updating risk numbers in risk appendix text, main text, and in site risk summaries and conclusions.

1.4.7 Incorporate Peer Review Comments

1.4.7.1 For the Chaquehui Canyon Aggregate Area, SUBCONTRACTOR shall prepare and submit a final IR to the FETL incorporating all peer review comments on or before June 5, 2020. This constitutes a final edited and composited version of the IR in electronic format, organized and formatted in compliance with N3B requirements for documents and deliverables.

1.4.7.2 For the South Ancho Canyon Aggregate Area, SUBCONTRACTOR shall prepare and submit a final IR to the FETL incorporating all peer review comments on or before July 10, 2020. This constitutes a final edited and composited version of the IR in electronic format, organized and formatted in compliance with N3B requirements for documents and deliverables.

1.4.7.3 For the Lower Water/Indio Canyons Aggregate Area, SUBCONTRACTOR shall prepare and submit a final IR to the FETL incorporating all peer review comments on or before September 4, 2020. This constitutes a final edited and composited version of the IR in electronic format, organized and formatted in compliance with N3B requirements for documents and deliverables.

1.4.7.4 The following assumptions are valid for sections 1.3.6:

1.4.7.4.1 SUBCONTRACTOR shall incorporate and resolve all comments resulting from a peer review process and shall obtain all required signatures from peer reviewers as required by the peer review process;

1.4.7.4.2 SUBCONTRACTOR shall submit all electronic files of the final draft document to the FETL per section 3.2 and 3.3; CONTRACTOR will prepare the submittal letter, produce the hard copies, and submit the final document to NMED.

1.4.7.5 SUBCONTRACTOR shall prepare presentation materials for internal, public, and/or regulatory meetings, if required.

1.4.8 Response to NMED Comments

1.4.8.1 SUBCONTRACTOR shall review and prepare responses to NMED comments associated with the Chaquehui Canyon Aggregate Area Investigation Report, the

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South Ancho Canyon Aggregate Area Investigation Report, and the Lower Water/Indio Canyons Aggregate Area Investigation Report.

1.4.8.2 SUBCONTRACTOR shall conduct planning meetings within 2 calendar days of receipt of NMED comments to discuss the technical approach for the responses and to present the schedules for submitting the responses. SUBCONTRACTOR shall record and submit meeting minutes and schedule to the FETL within 2 calendar days after the meeting date.

1.4.8.3 Submit to CONTRACTOR responses to NMED comments on the investigation reports within the time period specified by CONTRACTOR.

1.4.8.4 Prepare revised reports that incorporate the responses to comments, after the responses have been approved by NMED.

1.4.8.5 Produce and submit one hard copy of the final document and all electronic files to the FETL per section 3.2 and 3.3.

1.5 Optional Scope Work

1.5.1 SUBCONTRACTOR shall complete the site characterization and remediation for each AOC and SWMU at Chaquehui, South Ancho Canyon, and Lower Water/Indio Canyons Aggregate Areas (see section 1.4). Based on the results of the data/action summary reports and subsequent recommendations, additional characterization sampling and/or remediation may be required to characterize the sites and to achieve the risk-based cleanup goals. The additional sampling and excavation quantities needed to achieve the requirements set forth in this SOW are unknown; therefore, a portion of or all of the optional scope may be executed. For the optional scope of work, SUBCONTRACTOR shall assume the following:

1.5.1.1 Collect additional N&E samples (0-5 ft bgs) from up to 125 locations (see section

1.4.1 for details) and abandon boreholes. See Exhibit C Form A-1 Optional Pricing.

1.5.1.2 Collect additional N&E samples (0-15 ft bgs) from up to 60 locations (see section

1.4.1 for details) and abandon boreholes. See Exhibit C Form A-1 Optional Pricing.

1.5.1.3 Collect additional N&E samples (0-20 ft bgs) from up to 15 locations (see section

1.4.1 for details) and abandon boreholes. See Exhibit C Form A-1 Optional Pricing.

1.5.1.4 Collect additional N&E samples (0-100 ft bgs) from up to 10 locations (see section

1.4.1 for details) and abandon boreholes. See Exhibit C Form A-1 Optional Pricing.

1.5.1.5 To meet clean-up requirements assume up to an additional 300 cubic yards of material may be excavated and remediated based on the Industrial and/or Ecological Risk Screening Assessment results presented in the Data Action/ Summary Reports (see section 1.4.1 for details). Remediated sites will be backfilled and restored. See Exhibit C Form A-1 Optional Pricing.

1.5.2 The lateral and vertical extent of the subsurface tritium plume associated with SWMUs 32-002 (a-e) have not been defined. If executing this scope is determined necessary to meet DOE and/or Consent Order requirements, up to seven boreholes will be advanced to the top of the basalt (approximately 275 ft bgs) at various locations around the SWMU 32-002(a) septic system and near building 33-0086 (former tritium facility). Soil, tuff, and pore-gas vapor samples will be collected every 10-ft from each borehole and analyzed for

RFP-0000297 Page 16 of 29 tritium (see analytical table in Appendix D-5). Tritium vapor samples will be collected following Sampling Subsurface Vapor SOP (Appendix D-10). Tritium data will be reviewed to determine which boreholes, if any, will be completed as vapor-monitoring wells. For this options scope of work, SUBCONTRACTOR shall provide pricing for the following:

1.5.2.1 Mobilize drilling equipment and drill a borehole to the top of the Cerros del Rio Basalt (assume 275 ft bgs) and collect soil, tuff, and vapor samples for tritium every 10 ft (9-10, 19-20, 29-30, etc.). A casing may be set to keep the boring open pending tritium results.

1.5.2.2 Mobilize drilling equipment and drill a borehole to the top of the Cerros del Rio Basalt (assume 275 ft bgs) and collect soil, tuff, and vapor samples for tritium every 50 ft (49-50, 99-100, 149-150, etc.). A casing may be set to keep the boring open pending tritium results.

1.5.2.3 Set up on open boring, drill out slough, and install a stainless-steel vapor monitoring well with six sample ports.