SOW_TBC_CS_Edits_final__8_1.pdf

SCOPE OF WORK

Western Navajo Agency, Bureau of Indian Affairs, Tuba City, Arizona

Operational Unit 1 (OU-1) former Tuba City Motors Property Operational Unit 2 (OU-2)-Tuba City Agency Heating Plant and

Operational Unit 3 (OU-3)-BIA Roads Maintenance Yard Bioremediation and Waste Removals

INTRODUCTION: The Navajo Region Branch of Environmental Management (NRO BEM) is seeking the services of an environmental contractor specializing in bioremediation to remove historic petroleum and asbestos contaminated soils at the Bureau of Indian Affairs (BIA) Tuba City site, Tuba City, Arizona (Figure 1).

The contractor shall remove residual contamination using bioremediation at OU-2 and OU-3. These two sites also require removal of asbestos contaminated material waste. Asbestos containing materials (ACM) are located in OU-2 and OU-3 requires removal and backfilled with clean soil.) Once the waste removals are completed the bioremediation treatment shall be initiated for the OU-1, OU-2, and OU-3 sites to facilitate closure for these sites by addressing petroleum releases that are currently affecting groundwater. The site currently has 60 groundwater monitoring wells within all three operational units at the site for monitoring.

The site consists of three operational units (OUs) designated as OU-1, the former Tuba City Motors property, OU-2; the former Heating Plant property; and OU-3, the BIA Roads Maintenance Yard property, all located in central Tuba City, Arizona. The boundaries and selected site features of all three OUs are shown in Figure 2.

BEM has retained a contractor, who is conducting the sampling of the 60 groundwater monitoring wells at the three operational units.

For this project, the remedial work shall use in-situ bioremediation for OU-1, OU-2 and OU-3 to remove the release of petroleum hydrocarbons in soil and groundwater at these locations using Navajo Nation cleanup criteria. A bulk of the source area impacted soils have been excavated with residual impacts being present in such areas because the excavation limit is below existing water and sewer service lines and the bedrock interface. The batch injections will be used as bio-amendments to enhance in-situ bioremediation of these residual impacts. The bio-amendments shall be designed specifically for groundwater and smear zone soil remediation and effective for TPH contaminants.

Before bioremediation begins, the asbestos containing materials waste shall be removed in the areas of OU-2 and OU-3 area once testing has been confirmed the extent of contamination. The OU-2 previously had an asbestos containing material tool shed in the northern limit of the site which was removed in 2018. The footprint of the tool shed will require sampling for asbestos and petroleum hydrocarbons before removal is conducted. The OU-3 BIA Road Maintenance Yard shall also require removal of approximately 500 CBY of Asbestos Containing Materials (ACM )waste of concrete debris and asbestos fibers buried in the southeast area of the maintenance yard. It is unknown the extent or depth of the waste area. Once the removal of the ACM waste has been conducted, the bioremediation work shall commence. The work required for the OU-1, OU-2 and OU-3 is to start the bioremediation activities using bio-nutrients to remove the released petroleum hydrocarbons, DRO, and Benzene in soil and groundwater at these locations.

The releases impacted soils and groundwater above the Maximum Contamination Level for the Clean Water Act (40 CFR 131), and the Resource Conservation Recovery Act Regulations (40 CFR 280.65; and, the Oil Pollution Act (40 CFR 110-112). In 2014, The Navajo Environmental Protection Agency Leaking Storage Tank Program (NNEPA/LSTP), the U. S. Environmental Protection Agency, and Navajo Region BEM discussed a final remedy to clean the contaminated soil to above 500 parts per million (ppm) and reduced diesel residual impacts in groundwater by using the Regional Screening Levels (RSL) of 0.1 mg/L for groundwater.

The parties decided to remove the contaminated soils to bedrock level and install a bioremediation unit to add nutrients to enhance and speed up the cleanup of groundwater. The parties also decided to use a similar bioremediation unit at the Transportation Maintenance Yard OU-3. This is the first time this type of bioremediation system has been used to clean up petroleum hydrocarbons on tribal trust lands.

The OU-1, former Tuba City Motors and OU-2, former Heating Plant, received bio-nutrients in FY2016 and 2017. Since 2017, no bio-nutrients treatments have been conducted for OU-1 and OU-2. For the OU-3, the BIA Roads Maintenance Yard, the bioremediation piping system was re-installed in FY2018 due to damages from soil excavation project in this area. No bio-nutrients have been applied for OU-3. The groundwater sampling and monitoring is maintained throughout the OU-1, OU-2 and OU-3 by another contractor to determine the status of groundwater quality. Beginning in 1999 through 2018, the groundwater data shows some improvements, and diesel range organics (DRO) and Benzene are decreasing in samples from the four (4) monitoring wells. However, concentrations still remain above the regulatory standards for petroleum hydrocarbons.

Background and Project History: The Bureau of Indian Affairs (BIA) used heating oil as fuel sources of machinery and equipment within the OU-2 area. In 1999, an explosion in one of the on-line boilers resulted in the release of an unknown quantity of heating oil at OU-2. The product was stored on-site in two 50,000-gallon above ground storage tanks (ASTs) adjacent to Building 193. This explosion caused damage to the underground boiler system oil supply lines, which resulted in release of an unknown amount of heating oil to the subsurface. Immediate and initial site characterization efforts included the installation of 39 groundwater monitoring wells and 11 extraction wells. The initial site characterization efforts focused on the OU-2 area, but later expanded to the OU-1 area due to the related historical presence of an underground storage tank (UST) associated with the former Tuba City Motors facility and the finding of petroleum hydrocarbons in the groundwater samples obtained from the monitoring wells up gradient of OU-2. (Wells, August 2018).

Area OU-3 was also investigated because the area is located down gradient of both OU-1 and OU-2 and due to the potential releases associated with exterior storage of drums containing used petroleum products and ASTs.

The investigation found potential release sources, including USTs at the OU-1, the two ASTs, and subsurface piping at OU-2 have been removed. The ASTs and drums of motor oil in OU-3 had been previously removed.

In May 2018, Cherokee Nation Cherokee (CRC) was contracted to conduct remedial excavation of contaminated soils within OU-2 and OU-3.

In 2011, approximately 7000 gallons of heating oil and dissolved-phase liquids were recovered during remedial actions at the OU-2. The groundwater monitoring report prepared by TerraNext Inc., indicated that the heating oil was present in monitoring well MW-20 at the OU-2 site. The groundwater monitoring report also indicated petroleum constituents were present in groundwater at OU-3. The site wide results suggested multiple petroleum releases may have occurred at locations within OU-1, OU-2, and OU-3. Concentrations of benzene, toluene, ethylbenzene, and xylenes (BTEX) were slightly above U.S. Environmental Protection Agency (EPA) Preliminary Remediation Goals (PRGs), now called Regional Screening Levels (RSLs), for ground water were found at all the sites.

In 2016, approximately 1,760 CY of petroleum-impacted soil was excavated from OU-1 and shipped off site for disposal by Rock Gap Construction, subcontractor for E. W. Wells, LLC under a contract with BIA. The majority of impacted soils in OU-1 was encountered at depths of 5-10 feet Bgs which extended to bedrock interface. The base of the excavation was backfilled with processed gravel, which was covered with non-impacted shallow site soils and other imported soils. Residual soil impacts remained at the base of the excavation (bedrock interface), as well as, inaccessible areas including a water line and building. (Wells, 2017).

In 2015 and 2016, approximately 7,500 CY of petroleum impacted soils were excavated from OU-2 and shipped off for disposal by Rock Gap Construction. Most of the impacted soils were encountered at depths of 5 feet or more below ground surface (bgs). The impacted soils were excavated down to bedrock interface (10 to 12 feet bgs). The base of the excavation was backfilled with an approximately 2-foot bed of processed gravel.

Several lengths of perforated pipes were laid on the gravel to provide for option future injections of bio amendment fluids. Residual petroleum impacted soils remain at the base of the excavation, as well as in some perimeter and in accessible areas, such a below a sewer line and tool shed. The excavated area above the gravel was filled with original overburden non-impacted shallow site soils and soils imported from off site. In 2019, the tool shed was removed. (Wells, 2017).

In April and October 2017, Wells conducted injections event at OU-1 and OU-2, using subsurface piping systems installed in the excavations in 2016 and 2017. The injected materials consisted of Custom Blend Nitrate (CBN) fertilizer mixed with water, a surfactant and hydrocarbon-degrading consortium. A total of 9,000 pounds of CBN, 160 gallons of surfactant and 80 gallons of consortium were mixed with approximately 20,000 gallons of water were injected into OU-2. For the OU-1 site, 6000 pounds of CBN, 80 gallons of surfactant and 40 gallons of consortium were injected. (Wells, 2017).

PERIOD OF PERFORMANCE: The work identified in this contract is a performance-based contract.

1. 30-Days to completion of detailed work plan, project schedule and planning documents for the three OU’s.

2. 60-Days to conduct the excavations at OU-2 and OU-3.

• 500 CY of petroleum contaminated soils needs to be removed from the former tool shed at OU-

2. Soil sampling and of the tool shed shall be conducted before any bioremediation piping is installed.

• OU-3 the Roads Maintenance Yard: the asbestos containing soils/waste pile is located south of the former excavated area requires post soil sampling, removal of the waste, and must be backfilled with clean soil. Contaminated soils must be disposed of at a certified landfill. The waste requires removal before any bioremediation actions occur.

3. 30-days to develop a bio-treatment method that will enhance in-situ biological remediation that will reduce the diesel fuel and oil-range hydrocarbons contamination in soil and groundwater for all three OU sites. Once the bio-treatment method is designed and acceptable to the Navajo Nation EPA, the bioremediation can proceed. The OU sites have biological enhancement material installed into the bottoms of the excavated area to treat residual “smear zone” impacts, in the zone of annual groundwater fluctuations. The biological enhancement materials most likely to be considered would likely be diluted hydrogen peroxide, slow-releasing oxygen compounds (solid peroxide/peroxygens), diluted nutrient blends, petroleum-degrading bacteria (naturally occurring) and natural surfactants for bacterial. The main goal is preparing and using a bioremediation system that degrades the diesel fuel and petroleum contaminated soils in soil and groundwater efficiently and safely.

4. 240-Days to begin bioremediation treatment process at the OU-1, OU-2 and OU-3 using the accepted natural amendments to bio-degrade the petroleum contaminated soils and in groundwater. The bio-treatment shall use nutrients that are non-hazardous chemicals that will enhance the natural process of degradation that occurs overtime. It is important, the contractor establish the bio-treatment process meets the approval of the Navajo Nation Environmental Protection Agency. It will be the responsibility of the Contractor to work with NNEPA on the approval of the system to be used for OU 2 and OU-3 if another remediation approach is introduced for the cleanup of the operational units.

5. Subsequent work for this project will be determined when funding is received or required.

The expected duration of the monitoring work shall be 3 to 6 years for the bio-remediation process to demonstrate the application utilized decreases the petroleum impacted soils and contaminated groundwater shows decreasing trends. The work for this site is contingent upon the annual funding appropriations to the BEM program. The successful bidder will be awarded the initial contract for the first-year work initiative to remove the ACM and heating oil contaminated soils in OU-2 and OU- before the bioremediation piping system is installed at the OU-2 dependent on extent of contamination at the OU-2 site. The bioremediation piping is already installed within OU-3. The in-situ bioremediation process will begin in the first year or the second-year dependent on funding. NRO BEM and regulatory agencies will evaluate the work conducted by contractor for each subsequent year on the progress of the bioremediation.

The contractor shall meet with BIA and BIE Facility Management for input to the work plan and the schedule prior to preparation of a draft plan to implement the work. A copy of the plan incorporating comments to the plan shall be presented within 30 days from the meeting date. The Contractor shall be expected to travel at their own expense to the site and accompany BIA on a site field inspection prior to bidding on the project.

Contractors who do not attend the site visit will not be permitted to bid on the project. BIA will set the site visit date.

Contractors shall provide documentation of past bioremediation products and process with petroleum hydrocarbons, DRO and Benzenes which mirror the tasks for this project. The successful contractor shall prepare a project scenario with their proposal. Scenarios will be one of the major factors in determination of award.

Task 1: Pre-Work Submittals for each task:

A. A detailed Work Plan and Project Schedule for BIA review and approval prior to commencement of work for the three OU sites. The plan shall include the required work for ACM waste removal, preparation of bio-nutrients to be used in the bioremediation process.

B. Communication Plan C. Quality Assurance / Quality Control Plan D. NESHAPs Notification E. Dust Control Measures/Wetting of soils asbestos containing soils during waste removal.

F. Air monitoring during waste removal at OU-2 and OU-3.

G. Waste Management and approvals from BIA or BIE representative for manifests.

H. Backfill sources for the clean soil.

I. Analytical Testing at NVLAP certified laboratory for sampling of OU-2 and OU-3 sites.

J. In-Situ bioremediation applications.

B. Detailed Work Plan/other planning documents, shall include the soil sampling to determine the extent of ACM waste removal at OU-2 and OU-3 in TASK II. Quality Assurance/Quality Control Plan for sampling and analysis at certified laboratory for confirmation.

C. The bioremediation schedule to include preparation of the biological enhancement material to be used onsite; the periodic schedule to be followed for placement of biological enhancement material into the subsurface using the installed piping systems at each of the operational units. An application schedule of the biological enhancement material that will be used at each site to promote degradation of contaminants. This schedule will be approved by BIA BEM and the Navajo Nation Environmental Protection Agency.

C. Health and Safety Plan (HASP). The contractor shall prepare a site-specific HASP in accordance with 29 CFR 1910.120 to allow for the protection of workers, employers, and the general public. The HASP will contain certifications/licensures or workers and describe the use of all and appropriate PPE. Known and potentially occurring environmental hazards are exposure to petroleum hydrocarbons, potentially explosive atmosphere conditions if using a fertilizer as biological enhancer, tripping/falling hazards, presence of heavy equipment, utility lines, biological hazards, chemical hazards, venomous insects, snakes/reptiles, and mold.

• The plan shall include the company’s respiratory plan.

• The plan shall include the HAZWOPER certificates of the workers.

• Transportation and storage of fertilizer-bioremediation nutrients.

• COVID-19 protection plan for workers and employees at the OU project sites.

D. A list of subcontractors, experience with sampling, excavation, and bioremediation activities to efficiently conduct the work required.

E. Certified Environmental Scientist or Environmental Engineer licensed in any of the three states in which the Navajo Nation Reservation is located, Arizona, New Mexico, or Utah.

F. The contractor will prepare a communication plan and route plan for work conducted in OU-2 and OU-3 for the safety of the workers and Road Maintenance Yard operations. The plan should provide all necessary signs and barricades to control ingress or egress at the site.

TASK 2 -WORK

1. OU-2 Tuba City Heating Plant: In 2018 the remedial action included the excavation and disposal of the removal of 500 CY of contaminated soils from OU-2. A tool shed located in OU-2 limited the excavation activities of the petroleum contaminated soils. The tool shed was removed allowing access to conduct sampling in the footprint of shed and excavation.

• Sampling of tool shed footprint shall begin at 5 feet perimeter of the existing footprint and in 5 feet increments until levels are found below Navajo Nation Environmental Protection Agency (NNEPA) Petroleum standards of 500 ppm.

• Excavate and dispose at certified landfill of up to 500 cy of petroleum impacted soils

• Post-removal sampling is to be conducted

• A tool shed previously was in the OU-2 area that limited excavation of underlying petroleum soils. The shed has since been removed allowing for access to excavate. An 8” to 10” inch diameter sewer crosses this area and may require removal and replacement. Contractor shall work with BIE Facility Manager and the Navajo Nation Utility Authority for the sewer removal or any utility lines that are discovered.

• Additional bioremediation piping systems may be required based on the soil sampling results.

Contractor will provide all weight tickets, approvals and disposal information and manifests shall be included in the final report. BIA representative shall sign off on all manifests.

2. OU-3 Roads Maintenance Yard: The OU-3 Road Maintenance Yard has office buildings #199, Supply Building #314 and Storage barn and stores heavy equipment which is fenced in. Centrally located are stored heavy transportation equipment for road construction and miscellaneous roads equipment. The asbestos contaminated soil/waste is located on the south side of the excavated area. At the time of the excavation, there weres small pieces of visible asbestos materials on the south side of the excavated area. No information is available on the vertical or horizontal extent of the asbestos containing soils/waste that was buried there. It is assumed the waste pile extends out 5 feet however the amount of buried waste and depth is unknown. It is also unknown if only thermal insulation is buried or other solid waste.

• Perform sampling to evaluate the extent of contamination vertically and horizontally of the south side of the excavated area. Contractor will conduct site inspection for any visible asbestos materials location and use this information to develop a sampling plan to conduct clean up.

• The asbestos soils/waste shall be excavated and removed to certified landfill and backfilled with clean soils. Post excavated confirmation sampling shall be conducted.

• Post-remediation confirmation sampling shall be conducted.

• Perform daily air monitoring, wetting of soils for dust control measures during the excavation.

• During the excavation, contractor will limit access by employees and public.

• A work plan detailing the project schedule, communication with nearby businesses is required and communication with BIA employees.

• Contractor shall work with BIE facility manager, Safety Officer, BIA, and Navajo Tribal Utility

Authority to ensure no water or sewer lines are damaged during excavation activities.

• All asbestos containing materials seen on the surface shall be removed. Wetting of asbestos soil/waste shall be done and air monitoring to ensure the safety of the employees and community within proximity of the site. Backfill the excavated area with clean soil.

• Contractor will provide all weight tickets, approvals and disposal information and paperwork to shall be included in the final report. Any signatures required for the site consultation should be made with BIA.

TASK 3: Bioremediation of OU-1, OU-2, and OU-3:

1. OU-1 former Tuba City Motors: The work required for OU-1 is to begin the approved and selected bioremediation process for the petroleum hydrocarbons, benzene and DROs for this site. Rock Gap Construction re-installed the perforated piping and laid down the gravel before the excavated area was covered.

A monitoring well was also re-installed due to damage from the previous excavation that was performed. The bioremediation activities within the Road Maintenance Yard requires coordinate work with the Supervisory Roads Engineer, BIE Facility Manager and BIA Safety Officer ensure communication and safety.

2. OU-2 former Heating Plant: The work required for OU-1 is to begin the bioremediation for this site. The remedial piping has been completed and extension of the additional piping may be required at the former tool shed. The background and project history, along with groundwater monitoring sampling reports conducted in May 2018 and May 2019 are available for review.

3. OU-3 Roads Maintenance Yard: The work required for OU-3 is to begin the bioremediation for this site.

Rock Gap Construction completed the re-installation of the piping to begin the process. The background and project history, along with the groundwater monitoring sampling reports conducted in May 2018 and May 2019 are available for review.

All groundwater sampling data is pivotal in applying the bioremediation process to safely reduce the petroleum hydrocarbons, DRO, and Benzenes overtime. The first year of this project is to begin the bioremediation process for all three operational units.

Task 4: Bioremediation Process The NNEPA has expressed reluctance toward using chemical additions or injections to mitigate the contamination on site. Significant progress has been made since 1999 in reduction on the free-phase products within the OU 1 and some progress within the OU-2 areas with remedial method that was used. The method used was enhanced bioremediation process whereby materials and/or non-hazardous chemicals were introduced into the subsurface to interact with ground water, to enhance the natural process of degradation occurring overtime. If a new bioremediation method is considered, this will require the contractor and BIA to work with NNEPA/Leaking Storage Tank Program and the USEPA Region 9 for approval, and then implementation of the bioremediation can proceed. This will affect the project time schedule.

It is the responsibility of the contractor to provide the remedial method that shall be utilized to BIA BEM and the regulatory agencies. The remedial method to be used for the OU’s shall be provided along with the work plan and schedule for review by BIA and the regulatory agencies. This shall allow time for comments and present within the 30 days. The work plan shall be subject to approval before it is finalized and implemented by the contractor.

When the plan is approved, the contractor shall construct the system to begin the remedial process. The remediation of the soil and groundwater is expected to be approximately one year, and extension of the project may be considered. Monitoring of the bioremediation application to these sites shall be conducted to ensure the chemical constituents are decreasing.

Changes to this schedule will be negotiated with BIA CO and input from the COTR prior to the construction date. The Contractor shall be responsible for paying errors or omissions of the project which will increase the cost of the project.

As part of the work, further consideration will be addressed should the work be expanded to meet changing site conditions and to address concerns of the United States Environmental Protection Agency (USEPA) and NNEPA/LSTP for either of the OUs, the Contract Officer shall be contacted before work is initiated.

This contract will be a long-term contract to allow for the cleanup of the entire operational units by one contractor to conduct the remediation and monitor the progress for reporting to the regulatory agencies on all three of the operational units. As the environmental restoration of this project proceeds, the project may evolve, and additional work may be added to allow for the remediation of the groundwater and soil. The changes will be submitted for the contract with detailed modification descriptions and justification for BIA approval.

The work will be staged based on funding availability and necessary modifications to improve the remedial process as the environmental restoration is a dynamic and evolving process. All final reports will require certification by a professional engineer to assure work was conducted in accordance with the work plan and as defined in the federal regulations. Contractor must utilize a state certified analytical laboratory to process samples.

Task 5: REPORTING Contractor shall prepare a written project summary and appended the supporting documentation of the work performed. Submission of data reports and maps with a summary is not acceptable as the reports are submitted to regulatory agencies for review and discussion. Contractor shall prepare a power point presentation for the face-to-face meeting(s) with USEPA Region IX and NNEPA on progress of the OUs sites.

The contractor will develop a draft and final report containing:

(1) Description of the field work performed.

(2) Description of the subsurface lithology.

(3) The nature of extent of contamination in subsurface soils.

(4) Results of bench testing and

(5) Recommendations for corrective actions.

(6) Maps and drawings as described previously with surveyed improvement and sampling locations shall be included.

(7) Sample logs and subsurface soil cross-sections for suitable for an explanation of findings will be presented in the report.

(8) Recommended corrective actions, remediation strategies, monitoring requirements, and associated costs of future activities, necessary will be included in the report, as appropriate.

(9) Contractor will prepare a PowerPoint presentation of the site progress and data results. Presentations shall be conducted when requested by BIA, presentations shall be made to BIA and the regulatory agencies.

(10) Contractor shall prepare reports to submit on progress of the project for the regulatory agencies.

(11) All reports, data, and information on the Tuba City Operational Units 1, 2, and 3 projects is the property of

Bureau of Indian Affairs Navajo Region and shall require the approval of BIA before information is released or used.

(12) Contractor shall provide all field testing, results and project completions to BIA COTR within the draft and final reports.

(13) During field situations, the contractor shall maintain a daily log and record all events relevant to the task order. If the project is utilizing a sub-contractors for this project daily logs and records of all events are required The logs will be signed and closed daily shall become the property of BIA. Copies of all bills, receipts and time sheets shall be maintained, in case there is ever possible claim for cost recovery.

Documentation is available for review at NRO BEM Program Office, 301 West Hill Street, Gallup, NM 87301

• Site Investigation Report, OU-3, BIA Branch of Roads Yard, Western Navajo Agency, Tuba City, Arizona

• Draft Groundwater Monitoring Report, Bureau of Indian Affairs, Tuba City, Arizona Reports/Program files.

• Groundwater Monitoring Reports and Project work activities for OU-1, OU-2 and OU-3 and the Site

Investigation Report of OU-3, are located at the NRO BEM office for review.

Miscellaneous: Contractor shall bear the cost of duplication of reports.

REPORTS: Final reports, Copies, Data Management.

A. Any reports generated by the contractor shall be initially submitted as a draft for approval/concurrence by the CO/COR. Two copies and one electronic copy will be provided to BIA BEM.

B. A copy of all draft reports will be submitted to NRO BIA BEM and NNEPA, regulatory agencies for comments.

C. Final reports will be due within two weeks of the return of a draft. Five hard copies; one read only copy and one original electronic copy capable of editing shall be provided in MS Office software. The original file copy is property of the U.S. Department of Interior, Bureau of Indian Affairs, Navajo Region and shall not be copyrighted or distribute by the contractor without permission of the BIA NRO

BEM.

D. If reports are lost during the mailing process, the contractor shall reissue copied at his/her expense.

E. All final reports shall be signed by the certified environmental professional.

F. All correspondences shall be protected and secured. It shall not be made available to the public or any other agency without permission of the BIA.

Contractor shall submit a bi-weekly progress report of work activities. Acceptance Requirements: The BEM COTR with technical assistance from the Contractor and CO to meet with the regulatory agencies USEPA and NNEPA on the acceptability of the clean up work conducted at the site.. BIA BEM provides an annual report to USEPA Region 9 and the Navajo Nation EPA, will determine the acceptability of the work performed at the OU sites to reduce the levels of petroleum and heating oil contamination. The acceptability of work performed by BIA for these sites shall be conducted through a scheduled meeting/presentation by the contractor to the NNEPA and USEPA Region 9 on the bioremediation process.

INSTRUCTIONS, CONDITIONS, AND NOTICES TO CONTRACTORS

Special Conditions The contractor will adhere to all applicable federal and tribal laws and regulations.

The contractor will be responsible for payment of all tribal taxes.

The contractor shall be required to furnish electrical power and procure water to perform investigation, sampling, and mitigation.

The contractor is responsible for any utilities that are damaged during the work and shall repair them immediately at no cost to the Government. Contractor will work with the BIE Facility Manager to obtain location of utilities and to determine location of piping for the OU-2 and OU-3, unless ownership of the utilities is with Navajo Tribal Utility Authority (NTUA). The contractor shall work with NTUA.

Barring complications in site access or other site-specific factors, Contractor shall have 90 days to complete the bioremediation system.

All contact with the public, private or regulatory community shall be made through BIA, Navajo Region. No information may be released without written consent from BIA Navajo Region.

The contractor shall provide a schedule to BIA/BIE Point of contacts.

The Contractor is responsible for obtaining all required permits and authorizations associated with completing the tasks outlined above.

Attachments:

Figure 1- Vicinity Map Figure 2- Operational Units