20210928 Draft lFB No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1.pdf

U.S. Agency for International Development Tel: + 84-4-3935-1260 15/F Tung Shing Square Building Fax: + 84-4-3935-1265 2 Ngo Quyen Street Hanoi, Vietnam Web: vietnam.usaid.gov

DRAFT IFB DATE ISSUED : September 28, 2021

FINAL IFB DATE ISSUED : TBD

VIRTUAL SITE WALK/CONFERENCE : TBD, 2021 at 8.30 am to 10.30 am Hanoi local time CLOSING DATE FOR QUESTIONS : TBD, 2021 at 4.00 pm Hanoi local time CLOSING DATE TO RECEIVE BIDS : TBD, 2021 at 4.00 pm Hanoi local time VIRTUAL BID OPENING : TBD, 2021 at USAID/Vietnam Office in Hanoi OR at another location determined by USAID at 8.30 am to

10.30 am Hanoi local time

SUBJECT: Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

Dear Prospective Bidders:

The United States Agency for International Development in Vietnam (USAID/Vietnam) issues an Invitation For Bid (IFB) for a construction contract for USAID Civil Works - Phase 1 for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1. In accordance with Geographic Code 937, US and Vietnamese firms are eligible to participate in this IFB. This competition is not restricted to small businesses. All Prime and Sub- Bidders must comply with Authorized Geographic Code 937 and must not be Foreign Government-controlled Organizations as defined in 22

CFR 228.13.

Bidders must be registered with www.sam.gov (see Section L) and hold required licenses and registrations as specified in Section C. The interested Bidders must provide valid registration certificates issued by the relevant ministries to satisfy the evaluation panel that potential Bidders are authorized to perform the work specified in the IFB and have maintained registration as required. The data provided by the Bidders will be validated through relevant databases.

USAID/Vietnam will follow Federal Acquisition Regulations (FAR) Part 36 Construction and Architect – Engineer procedures for this procurement. The final evaluation of the bids will result in the issuance of a fixed price (FP) award per the Federal Acquisition Regulation (FAR) Part 14 and with option per FAR Part 17 to provide construction services as described in the attached IFB solicitation subject to availability of funds. USAID anticipates awarding a single award under this IFB solicitation. The estimated magnitude of the total bid of the Activity, as described in the IFB Section C, is more than $50,000,000. Instructions for responding to this IFB solicitation are provided in Section L and USAID will evaluate bids per IFB Section M. USAID will award a contract per FAR 36, FAR 14, FAR 16.202, and FAR 17.

Questions regarding this IFB must be submitted via e-mail to the points of contact identified in Section L no later than the date and time for questions stated above. Unless otherwise notified by an amendment to this IFB, USAID will not respond to questions after the deadline or by phone. Offerors must not submit questions to any other USAID staff. All questions submitted will be responded to in writing through an amendment to the IFB which will be publicly posted on www.sam.gov. Bids will be accepted electronically by the closing date and time shown above and in accordance with the instructions contained in Section L.4 of the IFB.

The site walk and conference will be scheduled among prospective Bidders and will be held virtually from Vietnam. Although they are not mandatory, Offerors are encouraged to attend this virtual site walk and conference. Prospective Bidders who wish to participate in this virtual conference may express their interest and provide their contact information, along with questions they wish to be answered during this virtual conference to Suzanne H. Johnson at sjohnson@usaid.gov and Karittha Jenchiewchan at kjenchiewchan@usaid.gov no later than TBD, 2021 Hanoi local time. Detailed information on the virtual conference will be provided to interested Bidders directly via email at a later date prior to the actual virtual conference.

http://www.sam.gov/ http://www.beta.sam.gov/ http://www.beta.sam.gov/

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

Issuance of this IFB in no way obligates USAID to award a contract, nor does it commit USAID to pay any cost incurred in the preparation and submission of a proposal. USAID reserves the right to reject any and all offers received. Award of a contract under this IFB is subject to availability of funds and other internal USAID approvals.

Final award of any resultant contract cannot be made until funds have been fully appropriated, allocated, and committed through USAID’s internal procedures. USAID bears no responsibility for data errors resulting from transmission or conversion processes.

Yours truly, /s/

Suzanne H. Johnson Contracting Officer USAID/Vietnam

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

ACRONYMS

2D/2-D Two Dimensional 3D/3-D Three Dimensional A/COR Alternate Contracting Officer’s Representative AALA American Association of Laboratory Accreditation AAPD Acquisition and Assistance Policy Directive AASHTO American Association of State Highway and Transportation Officials ACI American Concrete Institute ADAFC Air Defense-Air Force Command-Vietnam ADS Automatic Directive System AED Automated External Defibrillator AHA Activity Hazard Analysis AI Asphalt Institute AIDAR USAID Acquisition Regulation ANSI American National Standards Institute AOS Apparent Opening Size ARARs Applicable, Relevant, and Appropriate Regulations ASHRAE American Society of Heating, Refrigerating and Air-Conditioning ASTM American Society for Testing and Materials AWWA American Water Works Association BBP Bloodborne Pathogen BEO Bureau Environmental Officer BMP Best Management Practices BTNC Dense Graded Asphalt Concrete (Vietnamese Acr.)

CBR California Bearing Ratio CFR Code of Federal Regulations CLFMI Chain Link Fence Manufacturers Institute CM Construction Manager cm centimeter CO Contracting Officer COP Chief of Party COR Contracting Officer Representative CPAR Contractor Performance Assessment Reports CPM Contractor Project Manager CPR Cardiopulmonary Resuscitation CQC Construction Quality Control CQM Contractor Quality Manager CRSI Concrete Reinforcing Steel Institute CRZ Contamination Reduction Zone CSO Contractor Safety Officer CZ Clean Zone DCOP Deputy Chief of Party DDL Development Data Library deg F Fahrenheit degree DFW Definable Features of Work DONRE Department of Natural Resources and Environment DR Drainage DSC Differential Scanning Calorimetry DTM Digital Terrain Models DU Decision Unit EIA Environmental Impact Assessment EMMP Environmental Monitoring and Mitigation Plan EMP Environmental Mitigation Plan EPA Environmental Protection Agency EZ Exclusion Zone FAR Federal Acquisition Regulations FedRAMP Federal Risk and Authorization Management

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

FHWA Federal Highway Administration FIPS Federal Information Processing Standards FISMA Federal Information Security Management Act FM Fineness Modulus FMP Fatigue Management Plan GHG Green House Gas GHP Good Housekeeping Practices GRI Geosynthetic Research institute GVN Government of Vietnam HASP Health and Safety Plan HAZWOPER Hazardous Waste Operations and Emergency Response HCTS High Concentration Temporary Storage HDPE High Density Polyethylene HSO Health & Safety Officer HVAC Heating, Ventilating and Air Conditioning IAS International Accreditation Service IEE Initial Environmental Examination IFB Invitation for Bid IM Interim Measures IM2 USAID Second Interim Measures for Dioxin Remediation at Bien Hoa Airbase Area

in. inch ISO International Standards Organization kg kilogram kN/m kiloNewton per meter kPa kiloPascal kWp kilowatts peak LL Liquid Limit LSECS Lead Safety and Environmental Compliance Specialist LTSA Long Term Storage Area m meter mm millimeter MND Ministry of National Defense-Vietnam MONRE Ministry of Natural Resources and Environment MPa MegaPascal N/A Not Available NARA National Archives and Records Administration NCR Nonconformance Report NCTL Notched Constant Tensile Load NIST National Institute of Standards and Technology NPDES National Pollutant Discharge Elimination System NTP Notice to Proceed NVLAP National Voluntary Laboratory Accreditation Program O&M Operations and Maintenance OAA Office of Acquisition and Assistance oC Celsius Degree OIT Oxidation Induction Temperature OMB Office of Management and Budget OSHA Occupational Safety and Health Administration OWS Oil-Water Separator PCI Prestressed/Precast Concrete Institute PDF Portable Document Format PEL Permissible Exposure Limit pH Potential of Hydrogen PI Pacer Ivy PI Plasticity Index PII Personally Identifiable Information PPE Personal Protective Equipment Ppm/deg-C Part per million per Celcius degree

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

PVC Poly Vinyl Chloride QAPP Quality Assurance Project Plan QCL Quality Control Laboratory QCP Quality Control Plan QCR Quality Control Reports QCS Quality Control System QCVN National Technical Regulation (Vietnamese Acr.)

RAC Risk Assessment Code RCE Request for Categorical Exclusion RFI Requests for Interpretation SA&A Security Assessment & Authorization SAP Sampling and Analysis Plan SCBA Self-Contained Breathing Apparatus SCM Site Contractor Manager SCPM Site Contractor Project Manager SDS Safety Data Sheets SHASP Supplemental Health and Safety Plan SLAs Service Level Agreements SOV Schedule of Values SOW Statement of Work SP Single Point SP Special Publications SSN Social Security Number SW Southwest SWPPP Stormwater Pollution Prevention Plan TBD To Be Determined TCN Branch Standard (Vietnamese Acr.)

TCVN Vietnam Standard (Vietnamese Acr.)

TCXDVN Vietnam Construction Standard (Vietnamese Acr.)

TEQ Toxic Equivalence TIC Trusted Internet Connection TMA Thermomechanical Analysis ToS Terms of Services UCDDA Uncontaminated Construction Debris Disposal Area USACE U.S. Army Corps of Engineers USAID United States Agency for International Development USDA United States Department of Agriculture USG United States Government UXO Unexploded Ordinances VAT Value-Added Tax VOC Volatile Organic Compound W/C Water/Cement WMP Waste Management Plan WWR Welded Wire Reinforcement μm micrometer

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

PART I - THE SCHEDULE

SECTION B – SUPPLIES OR SERVICES AND PRICE

B.1 PURPOSE

The purpose of this Contract is to provide services specified in Section C. Statement of Work

B.2 CONTRACT TYPE

This is a Fixed Price Contract payable entirely in U.S. dollars. No additional sums will be payable for any escalation in the cost of materials, equipment or labor, or because of the Contractor's failure to properly estimate or accurately predict the cost or difficulty of achieving the results required. The Government will not adjust the contract price due to fluctuations in currency exchange rates. This price will include all labor, equipment, materials, other direct costs, overhead, and profit.

The price excludes all taxes and duties exempted in the Economic and Technical Agreement signed by the Government of Vietnam and the U.S. Government on June 22, 2005.

B.3 CONTRACT FIXED PRICE

The Contractor must complete all work (including furnishing all labor, material, equipment, and services) required under this contract for the following fixed price and within the time specified in section F.

CONTRACT LINE ITEM NOS. (CLINS) FIXED PRICE (USD)

CLIN 1 – BASE PERIOD TBD

CLIN 2 – DEMOBILIZATION TBD

CLIN 3 – UNIT PRICES FOR EXCESS QUANTITIES TBD

CLIN 4 – OPTION PERIOD TBD

Notes: The Contract is divided into Contract Line Items (CLINs), as summarized below.

CLIN 1: Base covers required work for the base period of performance, from NTP until April 2025, which coincides with the end of Year 3 dry season. Refer to C.13 Work Sequence for Year 1 - 3 work components included in this CLIN. If Dig & Haul and Roadway quantities exceed the estimates included in CLIN 1, the additional work will be implemented under CLIN 3. This CLIN is fully funded upon contract award.

CLIN 2: Demobilization is included as a separate CLIN to be authorized by USAID when required, either at the end of the base contract period of performance or the end of the exercised option period. This CLIN is fully funded upon contract award.

CLIN 3: Unit Prices for Excess Quantities includes fixed-unit-price line items and day works. The CO will authorize in writing the implementation of CLIN 3 which generally covers potential excess quantities for line items in CLIN 1 and CLIN 4 (if implemented/authorized by the CO) in case the estimated quantities in the fixed-price of these CLINs are exceeded. In addition to the excess quantities, CLIN 3 also includes i) additional day works upon written approval from the CO, ii) unit prices for the hauling of treated material for stockpiling or reuse as backfill, since the placement and use of these materials cannot be determined until Year 4, and iii) unit price for additional roadways. Work under CLIN 3 must adhere to all other requirements of the Contract.

CLIN 4: Option Period, if exercised/authorized by the CO, will cover work under Year 4 Dry Season (Option) and will extend the contract period 18 months from when the Option is exercised. Refer to C.13 Work Sequence for Option Period work components included in this CLIN. If Dig & Haul and Roadway quantities exceed the estimates included in CLIN 4, the additional work will be implemented under CLIN 3. All other requirements of the Contract will apply.

[END OF SECTION B]

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

SECTION C – DESCRIPTION/SPECIFICATIONS/STATEMENT OF WORK

C.1 TITLE

The title of the contract is “USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase I” or “Civil Works - Phase I.” The abbreviation is only authorized for internal use and is not the official branding/marking of the Contract.

C.2 BACKGROUND

The Dioxin Remediation at Bien Hoa Airbase Area Project (the Project) is one of the highest priority United States Government (USG) activities in Vietnam. In 2016, USAID collaborated with the Government of Vietnam (GVN) to prepare a report titled "Environmental Assessment of Dioxin Contamination at Bien Hoa Airbase". Then, in a Memorandum of Intent (MOI) signed on January 23, 2018, USAID and the Vietnam Military Science Department confirmed “their mutual desire to cooperate on efforts to remediate dioxin contamination at the Bien Hoa Airbase area, Vietnam.”

This MOI helped launch preparation of a Masterplan for the Dioxin Remediation at Bien Hoa Airbase Area Project.

Finalized in December 2020, the Masterplan presents a comprehensive 10-year plan to remediate dioxin at the Bien Hoa Airbase area. The electronic version of the Masterplan is published on USAID’s Development Experience Clearinghouse at https://pdf.usaid.gov/pdf_docs/PA00XF4J.pdf. The Masterplan divides Project activities into two five-year phases. Project Phase I activities include:

● USAID Architect-Engineer Services contract (A&E Contractor) providing civil works design and construction oversight services (awarded, estimated completion September 2022)

● USAID Architect-Engineer Services contract follow-on (planned for 2022)

● USAID First Interim Measures for Dioxin Remediation at Bien Hoa Airbase Area (IM1) (awarded, estimated completion June 2022)

● USAID Second Interim Measures for Dioxin Remediation at Bien Hoa Airbase Area (IM2) (awarded, estimated completion September 2022)

● USAID Treatment – Phase 1 for Dioxin Remediation at Bien Hoa Airbase Area (Treatment - Phase I)

(separate contract in procurement)

● USAID Civil Works - Phase 1 for Dioxin Remediation at Bien Hoa Airbase Area (Civil Works – Phase 1) (This

Contract)

C.3 OBJECTIVES

This contract, Civil Works - Phase 1, will support the Project through:

● Provision of remediation work in several on and off-base areas with high levels of dioxin contamination that pose important exposure risks;

● Construction and maintenance of facilities required to support other Project activities including the Pre- Treatment Storage Area (PTSA);

● Loading and unloading of material from other Project storage areas;

● Provision of roadwork, and fencing.

C.4 DESCRIPTION OF ACTIVITY

OWNER : USAID

ENGINEER/CONSTRUCTION MANAGER : Trigon Associates, LLC.

AIRBASE’s Management : Ministry of National Defense, Air Defense–Air Force Command, Division 370, and Regiment 935.

Engineering drawings and design reports are prepared by the Engineer/Construction Manager and approved by USAID and the Ministry of National Defence-Vietnam (MND).

It is the intent of the Contract Documents to describe a functionally complete project (or part thereof). The Contract Documents include this Contract, all Attachments referenced in Section J, as well as final designs issued by the COR https://pdf.usaid.gov/pdf_docs/PA00XF4J.pdf

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1 under the Contract. All components of the Contract Documents are complimentary, what is required by one is as binding as if required by all. The Civil Works - Phase 1 Contractor will excavate contaminated material and move material to and from designated storage areas. The Civil Works – Phase 1 Contractor will also build a PTSA and move material to this storage area for treatment by the Treatment - Phase 1 Contractor. Additionally, the work under this Contract includes roadway, drainage, fencing, and ancillary items required to complete the work, as well as maintenance of specified areas during the period of performance.

The Civil Works - Phase 1 work site is in the area of Bien Hoa Airbase (Airbase) in Bien Hoa, Dong Nai Province, Vietnam. The Civil Works - Phase 1 work site includes the following locations: the Pre-Treatment Storage Area (PTSA) and the Treated Material Storage Area (TMSA) in the ZT area of the Airbase; the Low Concentration Storage Area (LCSA), the High Concentration Storage Area (HCSA), the High Concentration Temporary Storage (HCTS), and the IM1 Staging Area in the Pacer Ivy (PI) area of the Airbase; the Long-Term Storage Area (LTSA) north of the Airbase runway and the Uncontaminated Debris Disposal Area (UCDDA) north of the LTSA; Decision Units (DUs) in the Southwest (SW), PI, Northeast (NE), Northwest (NW), and Northern Forest (NF) areas of the Airbase; a ZT DU near a former taxiway of the Airbase; and the following off-base areas: DONRE-A1, DONRE-A2, PI-12, and PI-15. See Attachment J.3 Civil Works – Phase 1 Overview.

C.5 WORK COMPONENTS

The Work Components of this Contract include, but are not limited to, the following brief description of improvements.

The COR will provide final designs for Work Components as available and as noted below. See C.13 Work Sequencing for illustrative scheduling of the Work Components by Contract Year.

WORK COMPONENT 1 - Treatment Area: The Contractor must deliver the following components of the treatment area. See Attachment J.4 Preliminary Civil Works Treatment Area Design. The final design for the Treatment Area will be provided to the Contractor with the Notice to Proceed (NTP). The Contractor must complete all Treatment Area works during Year 1, before placing Dig and Haul quantities in the PTSA.

● Pre-Treatment Storage Area (PTSA): The Contractor must deliver a complete and operational PTSA for the purpose of staging high concentration material after excavation by the Civil Works - Phase 1 Contractor and before treatment by the Treatment - Phase 1 Contractor. The PTSA covers approximately 30,000 square meters (m2) and is located in the ZT area, on the eastern side of the thermal conductive heating (TCH) treatment plant (to be constructed by the Treatment – Phase 1 Contractor). To complete this component, at a minimum, the Contractor must:

− Clear and chip site vegetation and haul to the LTSA.

− Remove topsoil and haul to the LTSA.

− Construct detention ponds for PTSA runoff and piping to treatment area drainage.

− Prepare the base of the storage area.

− Construct perimeter berm.

− Install double-sided textured HDPE liner.

− Install non-woven geotextile.

− Install sumps, piping, pump station, access points, and all ancillary items.

● Drainage: The Contractor must deliver the necessary infrastructure to drain water from the treatment area and remove it from the site. To complete this component, at a minimum, the Contractor must:

− Clear and chip site vegetation and haul to the LTSA.

− Grade work areas to drain to the perimeter.

− Reroute any existing flows through the site to the perimeter drain system.

− Improve the existing system of channels and culverts connecting to the pond located south of the treatment area.

− Construct a drainage system of channels and culverts around the perimeter of the site.

− Drainage system must be constructed prior to construction of the PTSA and be ready to accept flows from the treatment area.

● Fencing and Guard Shacks: The Contractor must install temporary steel sheet fencing around the treatment site, two guard shacks at access points to the site and one guard shack at the northeast corner of the temporary steel fencing, and complete all associated work including access gate installation.

● Access Roads: Construct concrete access roads within the Treatment Area. See roadway requirements in Work Component 3 below.

● Site Restoration: See General Work Requirements.

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

WORK COMPONENT 2 - Dig and Haul: The Contractor must excavate high and low concentration dioxin-contaminated materials from DUs in the SW, PI, NE, NW, ZT and NF areas of the Airbase and off-base DUs at DONRE-A1, DONRE-A2, PI-12, and PI-15 and transfer to LTSA or PTSA in accordance with the final designs. Dig and haul final designs will include excavation plans and sections indicating DU areas, excavation depth(s), high or low concentration, detail callouts, and relevant notes. Excavated materials must be dewatered before being hauled to storage. Material stored in the LTSA must meet compaction requirements specified in Attachment J.5 Compendium.

The Contractor must also move materials between storage areas as summarized below and move treated material from TMSA to approved backfill areas within the Civil Works - Phase 1 Work areas or an approved stockpile location.

The COR will notify the Contractor when treated TMSA materials can be moved. See Attachment J.6 Decision Units.

The COR will provide the Contractor with final designs for dig and haul on an annual basis before the start of each dry season.The Contractor must commence dig and haul work as soon as the rainy season ends and must complete the annual dig and haul before the start of the next rainy season. The projected timeline for the dig and haul component shown in Table 1. Estimated Annual Volume of Dig and Haul is intended as a guideline for the order of dig and haul of materials. The actual sequence and volume quantities will be based on the final designs provided annually. The estimated annual dig and haul bank volume quantities are based on the Masterplan and additional site characterization performed to date. Estimated quantities of material movement between storage areas are also based on bank volume quantities from dig and haul source DUs. Bank volume quantities are expected to range from approximately 60,000 m3 to 70,000 m3 per dry season, with the exception of Year 1 dry season as illustrated in Table 1. Estimated Annual Volume of Dig and Haul. The Table 1 quantities for Year 1 - 3 dry seasons have been divided between CLIN 1 and CLIN 3. The Year 4 dry season quantity has been divided between CLIN 4 and CLIN 3 to reflect potential quantity adjustments due to final site characterization. Additional excavation in excess of CLIN 1 and CLIN 4 (if exercised) will be implemented upon the CO’s authorization. The price of this excess excavation (CLIN 3) is calculated by the unit price(s) of the number of additional cubic meters of soil or sediment excavated, transported, and stored. The excess quantity must be measured as bank volume, based on pre-and post-excavation topographic surveys.

Additionally, the Treatment – Phase 1 Contractor will place treated material in the TMSA. Once notified by the COR, the Civil Works – Phase 1 Contractor will be required to haul approximately 50,000 m3 of un-compacted treated material from the TMSA and either stockpile in a secured location approved by ADAFC within 10 kilometers from the TMSA or reuse as backfill for the Project, depending on the quality of the treated material. Also dependent on the quality, additional material may be available for reuse as backfill if and when optional Year 4 dry season is exercised.

Given the uncertainty around exact dig and haul quantities from the TMSA and placement, the treated material stockpiling and site restoration backfill for the optional Year 4 dry season are included in CLIN 3. The quantities for unloading, transport, stockpiling or backfill and compaction of treated materials are bank volume quantity estimates from dig and haul source DUs.

● Dig and Haul: To complete this component, at a minimum, the Contractor must:

− Clear and chip above grade vegetation, set aside for later use in site restoration.

− Dewater excavation areas as required.

− Excavate high and low concentration DUs as indicated in the final designs. All low concentration material must be hauled and placed in the LTSA. All high concentration material must be hauled and placed in the

PTSA.

− Gravel, stones, rocks, and boulders greater than or equal to 100 mm in size from low-concentration areas will be placed in the LTSA. Do not place directly on or under geotextile or HDPE liners. Provide a minimum soil cushion of 15 cm between liners and gravel, stones, rocks, and boulders. Gravel, stones, rocks, and boulders greater than or equal to 100 mm in size from high concentration areas must be cleaned and the surface must be tested by the Contractor. Rocks and boulders must be scrubbed if testing shows contamination and retested until clean. Cracked rocks and boulders must be masticated before hauling to PTSA and clean/uncontaminated rocks and boulders must be transported to an approved location on-base.

− Set aside contaminated debris including below-ground stumps and roots encountered during excavation and place them in the same storage area in which surrounding material is specified to be placed. Before moving contaminated debris to the LTSA or PTSA, crush concrete and materials with voids, chip stumps and roots.

Do not place debris directly on or under geotextile or HDPE liners. Provide a minimum soil cushion of 15 cm between liners and debris.

− Unload low concentration material from the LCSA, haul, place, grade, and compact material in the LTSA.

− Unload high concentration material from the HCSA and the HCTS, haul, place, and grade material in PTSA.

− Unload treated material from the TMSA, place and grade in approved stockpile or backfill areas, compact in backfill areas.

− Provide temporary cover on a daily basis consisting of a high-density polyethylene (HDPE) layer, secured by placing a sandbagged soil anchor to provide a continuous seal along the base.

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

● Fencing and Guard Shacks: The Contractor must install movable barrier fencing on-base and temporary steel sheet fencing and access gates off-base around excavation areas as required. Install guard shacks as required and all associated work for fencing and guard shacks. See Attachment J.3 Civil Works – Phase 1 Overview for locations.

● Site Restoration: See General Work Requirements. If required, confirmatory sampling of excavated DUs will be performed by others. The Contractor must allow up to 4 weeks for confirmation prior to backfilling of excavated areas.

Table 1. Estimated Annual Volume of Dig and Haul

PHASE 1

VOLUME (m3) STORAGE SOURCE DECISION UNITS/

ACTIVITIES SOIL SEDIMENT

Year 1 Dry Season

35,000 0

LTSA

NF-04A, NF-04B

30,000 0 Move low concentration material from LCSA to LTSA

20,000 0 PTSA Move high concentration material from HCTS and HCSA to PTSA

Year 2 Dry Season

7,000 1,000 LTSA SW-07E, SW-07A1, NE-07

53,000 1,000 PTSA SW-07A1, SW-7D, NE-07, PI-02C, PI-

02B (30%), ZT-02B

Year 3 Dry Season 5,000 18,000 LTSA NE-08A, NE-08B, NE-09, NE-15C, PI- 02A (11%)

46,000 0 PTSA PI-02B (70%), PI-02A (32%),

Year 4 Dry Season (Option)

9,000 15,000 LTSA NE-11, NE-12, DONRE-A2-2B, NW-

03C, NW-04A, PI-12, PI-15, PI-13A1

38,000 2,000 PTSA PI-02A (57%), DONRE-A1, DONRE-

A2-3C, PI-12, PI-15

TOTAL 243,000 37,000

HCSA = High Concentrations Storage Area in PI-13 HCTS = High Concentration Temporary Storage in PI-13 LCSA = Low Concentration Storage Area in PI-13 LTSA = Long Term Storage Area PTSA = Pre-Treatment Storage Area % of DUs indicated to reach indicated volumes Dry Season is approximately November to April each year. See C.8 Consideration for Climate.

WORK COMPONENT 3 - Roadways: The Contractor must rehabilitate and reconstruct roadways and ditches throughout the Airbase hauling routes. See Attachment J.7 Hauling Roads. The COR will provide final designs for hauling and access road work as they are available. Approximate timing of roadway improvements are included in C.13 Work Sequence. Given uncertainty around the exact quantity of roadway improvements during the period of performance, unit price line items and additional quantities have been included in CLIN 3, to be authorized by the CO as required.

● The Contractor must construct access roads to connect the hauling road to PTSA. See Attachment J.4 Preliminary Civil Works Treatment Area Design.

● The Contractor must upgrade an unpaved aggregate portion of the hauling road between Gate 3 and the treatment area. Roadway composition is as shown in Figure 1, Attachment J.7 Hauling Roads.

● The Contractor must reconstruct the SW-07 road section through DUs SW-07A1 and SW-07D. Composition as shown in Figure 2, Attachment J.7 Hauling Roads.

● The Contractor must patch and repair hauling roads as required and as damage occurs from construction activities. Composition as shown in Figure 3, Attachment J.7 Hauling Roads.

● The Contractor must construct masonry ditches along hauling roads as required. See Figure 4, Attachment J.7 Hauling Roads.

● Additional roadway reconstruction as required. Composition as shown in Figure 2, Attachment J.7 Hauling Roads.

● Existing drainage-ways must be rerouted during construction and reconstructed.

● Site Restoration: See General Work Requirements.

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

WORK COMPONENT 4 - Protect, Maintain, and Handover Assets in Project Areas: The Contractor must protect and maintain all work areas and assets handed over from MND to USAID, as summarized below. The Contractor must handover all work areas in good working condition for use by the Airbase or other USAID contractors at the end of the period of performance. The Contractor must also provide temporary cover over all stored materials on a daily basis consisting of a high-density polyethylene (HDPE) layer, secured by placing sandbagged soil anchors to provide a continuous seal along the base. To complete this component, the Contract must protect and maintain the following areas:

● Installed storage areas and all associated work upon handover from other USAID contractors as noted in Section

C.9 “Work by Others”. See Attachment J.8 IM1 LCSA and HCSA and Staging Area Plans and Sections, Attachment J.9 IM2 LTSA and HCTS Plans and Sections, and Attachment J.10 LTSA IM2 and Civil Works - Phase 1 Fill Areas.

− LCSA.

− HCSA.

− HCTS.

− LTSA including installation of final cover: The Contractor must install final cover upon completion of loading all low concentration dig and haul material for CLIN 1 and associated excess material from CLIN 3. If CLIN 4 is exercised, the Contractor must also install final cover upon completion of loading all low concentration dig and haul material for CLIN 4 and associated excess dig and haul material from CLIN 3. This consists of:

▪ Non-woven geotextile fabric layer.

▪ HDPE double sided rough geomembrane liner.

▪ Anchor base of fill area north of the internal roadway with stone masonry channel between base of fill area and the existing access road, tie-ins to existing culverts.

▪ Sandbag anchor at base along the east side.

▪ Galvanized gabion.

▪ Geo-composite drain.

▪ Clean soil backfill.

▪ Top soil for native grass.

▪ Native grass.

▪ Irrigation system, including groundwater wells.

− UCDDA.

● Treatment area components under the Civil Works – Phase 1 contract including the PTSA, PTSA detention ponds, pump station, drainage, and all associated work.

● Roadways, ditches, grass cutting and tree trimming alongside roadways, guard shacks, fencing, and all associated work.

● Existing steel fencing, as shown in Attachment J.3 Civil Works – Phase 1 Overview.

WORK COMPONENT 5 - Storage and Staging Area Demolition: The Contractor must demolish the following areas.

See Attachment J.8 IM1 LCSA and HCSA and Staging Area Plans and Sections and Attachment J.9 IM2 LTSA and HCTS Plans and Sections.

● IM1 staging areas in PI: Upon completion of IM 1 work, and as directed by the COR, demolish crushed stone layer and imported fill and haul road. For available drawings, see Attachment J.8 IM1 LCSA and HCSA and Staging Area Plans and Sections, PI-2 Restoration Plan C-18, Notes 4 and 5. Haul debris to the proper storage area as directed in the final designs to be provided by the COR.

● LCSA: Upon removal of all contaminated material to the LTSA, demolish LCSA, clean/treat all materials and dispose in accordance with the Compendium. Level berms and match existing adjacent grade.

● HCSA: Upon removal of all contaminated material to the PTSA, demolish HCSA, clean/treat all materials and dispose in accordance with the Compendium. Level berms and match existing adjacent grade.

● HCTS: Upon removal of all contaminated material to the PTSA, demolish HCTS, clean/treat all materials and dispose in accordance with the Compendium. Level berms and match existing adjacent grade.

● Site Restoration: See General Work Requirements. Fill for restoration will initially be off-site borrow material.

Beginning in Year 4, it is anticipated that treated material from the TMSA will be used as site restoration fill if approved for reuse.

C.6 GENERAL WORK REQUIREMENTS

1. All mobilization activities are to occur within 28 calendar days upon Notice to Proceed (NTP). Mobilization includes establishment of functioning Contractor project office(s) in the vicinity of the work areas, as indicated in the Contract Documents and final designs.

2. The Contractor must provide all items, articles, materials, equipment, and appurtenances, mentioned herein or

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1 shown on the drawings, and all labor, workmanship, tools, and appliances required for the proper installation thereof, to accomplish the work. In general, the Contractor must provide any item of labor or material which is necessary to accomplish the work, whether specifically mentioned or not.

3. The Contractor must provide a temporary site office for the Contractor’s use. The site office will be located in PI- 05C during the first year of the contract. The Contractor will be required to relocate their site office to the current location of the IM1 or IM2 site office (north of and adjacent to PI-05C) following completion of the IM1 or IM2 contract upon the COR’s direction.

4. The Contractor must perform work in accordance with the Compendium of Design and Material Standards (Compendium), Attachment J.5 Compendium. The Compendium includes Project specifications and details.

5. All work performed must be done in accordance with the Contractor developed and approved work plans, as specified in Section F and the Compendium.

6. The Contractor must review and agree to follow the procedures of Attachment J.11 Site-Wide Health and Safety Plan and any provided supplemental plans and Attachment J.13 Site-Wide Environmental Mitigation and Monitoring Plan.

7. The Contractor must complete work according to final designs provided by the COR and coordinate work activities with the Engineer/Construction Manager during the contract period of performance. The Contractor must coordinate with other USAID contractors in the use of the work site in accordance with C.9 Work by Others.

8. Demolition required to perform the work will be as indicated in the Contract Documents and final designs.

9. The Contractor must place uncontaminated, i.e., non-dioxin contaminated, construction debris (with dioxin confirmatory sampling result under 40 ppt TEQ) in the UCDDA.

10. The Contractor must provide and maintain environmental mitigation measures including stormwater pollution prevention and erosion control measures for all work areas throughout the contract period of performance.

11. The Contractor must fully restore all areas of work and other affected areas to existing or improved conditions according to the Contract Documents. Site restoration includes backfilling of excavated areas, grading, topsoil, sodding/revegetation of disturbed areas, as well as replacement and repair to condition existing prior to disturbance by the Contractor of all utilities, curbs, fences, sidewalks, pavements or other structures or obstacles the removal of which is necessary for the execution of this Contract.

C.7 REQUIRED REGISTRATION AND LICENSES

At the time of bid opening and throughout the period of performance the Prime Contractor must (1) hold a valid Construction Operation Capability Certificate (in construction implementation and construction design at any grade, refer to Article 83 of Decree 15/2021/NDCP) or (2) submit with their bid package the qualifying materials required to apply for a construction operations license for foreign contractors (refer to Article 102, Article 103 and Article 104 of Decree 15/2021/NDCP).

At the time of bid-opening and throughout the period of performance either the Prime Contractor or the subcontractor(s) responsible for handling contaminated material must also hold a valid Vietnamese Ministry of Natural Resources and Environment Government of Vietnam Hazardous Waste Disposal License (Giấy Phép Xử Lý Chất Thải Nguy Hại). If this requirement is fulfilled through a subcontractor, the Bid Package must include an affirmation signed by the Prime Contractor and subcontractor confirming that the license of their subcontractor will cover for all activities of this contract as required by MONRE.

C.8 CONSIDERATION FOR CLIMATE

The Contractor must suspend Dig and Haul activities during the rainy season, May through November with November as a transitional month, unless otherwise directed by the COR.

Bien Hoa Airbase area is located within an area of Asian monsoon tropical climate; influenced by the Northeast monsoon, Southwest monsoon, and the Pacific Ocean tropic atmosphere with two distinct wet and dry seasons. The wet season lasts approximately six (6) months, from May 1 through October 31. April and November are transitional

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1 months with variable dry and rainy weather conditions.

Precipitation data was obtained for the Bien Hoa Station from the Government of Vietnam (GVN) Hydrometeorological General Bureau, Hydrometeorological Monitoring Center for the years 1994 through 2019. Rainfall during the season accounts for approximately 84 percent (%) of the annual total rainfall. Annual and seasonal rainfall is provided in Figure 1, monthly rainfall in 2, and rainy days per month (> 3mm/day) in 3.

The Contractor must consider historic weather patterns and predicted climate change related increases in the frequency and intensity of extreme weather events for construction planning and scheduling. Contractor must take all reasonable precautions to secure the work area against such potential damages due to rainfall.

FIGURE 1 ANNUAL AND SEASONAL RAINFALL AT BIEN HOA STATION IN YEARS 1994–2019.

FIGURE 2 MONTHLY RAINFALL AT BIEN HOA STATION 1994-2019

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

FIGURE 3 RAINY DAYS PER MONTH AT BIEN HOA STATION IN YEARS 1994–2019.

C.9 WORK BY OTHERS

Where two or more contracts are being performed at one time on the same site or adjacent land in such a manner that work under one contract may interfere with work under another, the Owner will determine the sequence and order of the work in either or both contracts. When the site of one contract is the necessary or convenient means of access for performance of work under another, the Owner may grant privilege of access or other reasonable privilege to the Contractor so desiring, to the extent, amount, in manner and at time that the Owner may determine. No Owner determination of method or time or sequence or order of the work or access privilege may be the basis for a claim for delay or damage except under provisions of the Contract for temporary suspensions of the work. The Contractor must conduct its operations so as to cause a minimum of interference with the work of such other USAID contractors and must cooperate fully with such contractors to allow continued safe access to their respective portions of the Project Site, as required to perform work under their respective contracts.

Other USAID Contractors:

● A&E Contractor: The A&E Contractor is the Engineer and Construction Manager for the Project.

Responsibilities of the A&E Contractor are listed in Section G.4.

● IM1 Contractor: The IM1 Contractor is responsible for the LCSA and the HCSA for the duration of the IM1 contract. Coordination with USAID, the A&E Contractor, and the IM1 Contractor will be required for Civil Works – Phase 1 activity within the LCSA. Following completion of the IM1 contract, anticipated within Year 1 of this Contract, the LCSA and the HCSA will be handed over to the Civil Works – Phase 1 Contractor.

● IM2 Contractor: The IM2 Contractor is responsible for the HCTS and the LTSA for the duration of the IM2 contract. Following completion of the IM2 contract, the HCTS will be handed over to the Civil Works – Phase 1 Contractor filled and covered, and the LTSA will be handed over to the Civil Works – Phase 1 Contractor with a portion of the storage area filled and covered. The remaining available volume in the LTSA will be partially filled by the Civil Works – Phase 1 Contractor. It is anticipated that the HCTS and the LTSA will be handed over to the Civil Works – Phase 1 Contractor within Year 1 of this Contract.

● Treatment – Phase 1 Contractor: The Treatment – Phase 1 Contractor is responsible for the TCH treatment plant and all components and systems required to support the TCH treatment plant. The Treatment – Phase 1 Contractor is also responsible for the TMSA throughout the duration of the Civil Works – Phase 1 Contract.

Coordination with USAID, the A&E Contractor, and the Treatment – Phase 1 Contractor is required for Civil Works – Phase 1 activity within the TMSA. The Civil Works – Phase 1 Contractor must also allow the Treatment – Phase 1 Contractor to access and remove material from the PTSA.

The Contractor must also coordinate with all utility entities of the Airbase or entities of other public or private agencies engaged in the relocation, altering, or otherwise rearranging of any facilities which interfere with the progress of the work and must schedule the work so as to minimize interference with said relocation, altering, or other rearranging of facilities.

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

C.10 OUTAGE PLANS AND NOTIFICATIONS

Unless the Contract Documents indicate otherwise, the Contractor must not remove from service, de-energize, or modify settings for any existing operations, equipment, structure, road, or any other facility without permission from the Engineer/Construction Manager.

The maximum duration of any outage must be 24 hours.

Where the work requires modifications to existing facilities or construction of new facilities and connection of new facilities to existing facilities, the Contractor must submit in accordance with the Compendium a detailed outage plan and schedule for the Engineer/Construction Manager 's approval, with a copy to the COR.

The outage plan must be coordinated with the construction schedule and must meet the restrictions and conditions of the Contract Documents. The outage plan must describe the Contractor's method for controlling service disruptions;

the length of time required to complete said operation; any necessary temporary power, controls, instrumentation or alarms required to maintain control, monitoring, and alarms; and the manpower, plant, and equipment which the Contractor will furnish for proper operation of equipment. All costs for preparing and implementing the outage plans must be at no increase in cost/price of the Contract.

The Engineer/Construction Manager and the COR must be notified in writing at least one week in advance of the required outage if the schedule for performing the work has changed or if revisions to the outage plan are required.

The Contractor must provide written confirmation to the Engineer/Construction Manager of the outage dates and time two (2) working days prior to the actual outage.

C.11 OWNER AND AIRBASE OCCUPANCY

The Contractor must be aware that the project site is an active airbase. As such, the Contractor must coordinate activities with the Owner and Airbase, follow site access protocols, and adhere to any other restrictions or requirements as mandated by authorities having jurisdiction and as stipulated in the specifications.

The Airbase may utilize all or part of the existing facilities in the Civil Works - Phase 1 work site during the entire period of performance for the Airbase's normal operations. The Contractor must cooperate and coordinate with the Owner to facilitate the Airbase's operations and to minimize interference with the Contractor's operations at the same time. In any event, the Owner must be allowed access to the work site throughout the period of performance.

C.12 CONTRACTOR USE OF SITE AND PREMISES

Unless authorized by the Owner, the Contractor must not access areas beyond the work site. If the Contractor feels that it is necessary to enter areas outside the work site limits, a written request presenting the reasons and a description of work to be performed must be submitted to the Owner for approval. The Contractor's use of the work site must be limited to its construction operations, including on-site storage of materials, on-site fabrication facilities, and field offices.

The Contractor must not obstruct roadways, sidewalks, or other ways on the Airbase without permission from the Engineer/Construction Manager and the Contractor’s approved traffic control plan.

C.13 WORK SEQUENCE

The Contractor must coordinate work activities with the COR and the Engineer/Construction Manager during the Contract period of performance.

The Contractor must complete Work in stages during the contract period of performance to accommodate the Project schedules of other USAID contractors. The sequence in Table 2 outlines the projected annual Work activities, it is not a comprehensive list of all Work required. Final designs will be provided to the Contractor as indicated in the Work Component descriptions.

Draft Invitation for Bids (IFB) No. 72044021B00001 USAID Civil Works for Dioxin Remediation at Bien Hoa Airbase Area – Phase 1

TABLE 2. WORK SEQUENCE

Annual Year Activities

Year 1 (NTP - April 2023)

Mobilization, Preparation Site Office Construction Upgrade Unpaved Section of Hauling Road Between Gate 3 and Treatment Area Road Patching Passing Areas Treatment Area Components Dig and Haul Movement of Low Concentration Material from LCSA to LTSA Movement of High Concentration Material from HCTS and HCSA to PTSA Site Restoration

Year 2 (May 2023 - April 2024)

Dig and Haul Masonry Ditches Reconstruction of SW-07 Road Section Road Patching

Maintenance of LTSA Including Drainage, LTSA Site Office, and all Associated Facilities Maintenance of LCSA, HCSA, and HCTS and Demolish After Completion of Material Hauling Installation of Guard Shacks Grass Cutting and Tree Trimming Alongside Roadways, Maintain Ditches, Roadways, Fencing, Guard Shacks, and Existing Steel Fencing Site Restoration

Year 3 (May 2024 - April 2025)

Dig and Haul Road Patching Masonry Ditches LTSA Final Cover at Year 1-Year 3 Fill Area

Operation and Maintenance of Treatment Area Components Including the PTSA, PTSA Detention Ponds, Drainage, Fencing, Guard Shacks, Access Roads, and all Associated Work Maintenance of LTSA Including Drainage, LTSA Site Office, and all Associated Facilities Grass Cutting and Tree Trimming Alongside Roadways, Maintain Ditches, Roadways, Fencing, Guard Shacks, and Existing Steel Fencing Site Restoration

CLIN 4 Option Period (May 2025

- September 2026)

Dig and Haul Road Patching Masonry Ditches Reconstruction of Road Haul Treated Material LTSA Final Cover at Option Period Fill Area

Maintenance of LTSA Including Drainage, LTSA Site Office, and all Associated Facilities

Draft Invitation for Bids (IFB) No.