STATEMENT_OF_WORK.pdf

BUREAU OF LAND MANAGEMENT

FARMINGTON FIELD OFFICE

LEE ACRES LANDFILL CAPILLARY BARRIER MONITORING

Item Description

1. Base year: Professional monitoring of the Lee Acres Landfill Superfund site managed under CERCLA authority

POP: 08/10/2021 – 08/09/2022

2. Option year one: Professional monitoring of the Lee Acres Landfill Superfund site managed under CERCLA authority

POP: 08/10/2022 – 08/09/2023

3. Option year two: Professional monitoring of the Lee Acres Landfill Superfund site managed under CERCLA authority

POP: 08/10/2023 – 08/09/2024

4. Option year three: Professional monitoring of the Lee Acres Landfill Superfund site managed under CERCLA authority

POP: 08/10/2024 – 08/09/2025

5. Option year four: Professional monitoring of the Lee Acres Landfill Superfund site managed under CERCLA authority

POP: 08/10/2025 – 08/09/2026

BUREAU OF LAND MANAGEMENT

FARMINGTON FIELD OFFICE

LEE ACRES LANDFILL CAPILLARY BARRIER MONITORING

STATEMENT OF WORK

1. General Discussion

The Capillary Barrier (CAP) designed for the Lee Acre Landfill is in place. The design and construction of the capillary barrier was a joint effort between the Bureau of Land Management (BLM), the Environmental Protection Agency (EPA), San Juan County New Mexico, with consulting support from Dr. Stephen Dwyer. BLM and EPA agree to continue CAP monitoring for the next five years. Performing monitoring and maintenance on this site managed under the authority of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) require experience and expertise in the area of concern, a minimum of 10 years of landfill cover work experience, and a registered professional engineer (PE) is recommended.

2. Scope of Work

Task 1 - Conduct ten (10) site visits

Requirements – Site visits will be conducted as described in the Lee Acres Remedial Action Work Plan, Appendix E, Monitoring Plan & Procedures (Attached). Monitoring will be performed semiannually for the next five years unless notified by the Project Manager of a change of schedule.

Deliverables – The Contractor will provide a trip report with the following information:

Discussion of observation Any data collected Recommendations of CAP integrity and associated monitoring equipment Provide electronic copy of report to point of contact

Task 2 - Provide Technical Assistance and Support to the Farmington District Office (FDO) and attend one (1) 3rd 5-Year Review Meeting

Requirements - Attend Lee Acres Five Year Review meetings and/or other public and agency meetings to provide technical expertise to the public or other agency personnel concerning the efficacy of the Lee Acres Capillary Barrier. Prepare and present presentations related to the Lee Acres Capillary Barrier as requested by FDO.

Deliverable - The Contractor will provide a trip report with the following information:

Documentation of the nature of the meeting or other event attended.

Copies of presentations proposed or delivered.

Task 3 - Document Preparation and Review

Requirements – Provide assistance in the preparation and review of Lee Acres Five Year Review reports.

Deliverables - Written comments of all documents reviewed in support of the Lee Acres Five Year Review reports. All work requested will be under the direction of the Lee Acres Project Manager.

Task 4 - Submit all invoices electronically via the Internet Payment Platform (IPP); reference DOI Clause, DOI Electronic Invoicing and Payment Requirements – IPP. Itemized invoices shall be reviewed by the COR and authorized for payment in accordance with the Prompt Payment Act.

3. Schedule

The deliverables will be submitted to the Point of Contact as follows:

Trip Reports – Due twenty (20) calendar days from the date of visit.

Document review comments due within (20) calendar days from the date the draft document was provided by the Lee Acres Project Manager.

mailto:nperry@blm.gov mailto:jtafoya@blm.gov etippeco Cross-Out etippeco Cross-Out

APPENDIX E

Monitoring Plan & Procedures

Post Closure Monitoring of the Lee Acres Landfill Regulations for hazardous waste facilities presented in 40 CFR §264.118 require facility owners or operators to prepare a written post-closure plan that includes a description of the post-closure monitoring activities and the frequency of such activities. The purpose of these activities is to ensure the integrity of the cover system and the function of the monitoring equipment.

Maintenance activities will be directly dependent on monitoring issues found during these inspections.

An important feature of the landfill cover monitoring is the inclusion of lysimeters installed under the cover profile. There will be two lysimeters installed. One will be installed directly above the northern lagoon while the second above the southern lagoon. The lagoons are presumed to be the direct cause of contaminant increases in the groundwater and consequently are the points of most concern with regard to preventing further infiltration into the existing plumes. Initially an annual flux of 1.3 mm/year will be used as the initial alert level for determining the effectiveness of the cover system. There is no universally accepted performance standard for landfills at this time. Studies at the Rocky Mountain Arsenal superfund site in Denver, Colorado are using 1.3 mm/year as an acceptable flux for the cover systems installed there over highly contaminated sites based on such studies that include the lysimeter measurement accuracies and phenomena such as barometric pumping of moisture within the soil profile.

Personnel responsible for performing monitoring and maintenance duties on a CERCLA site generally must have extensive experience and expertise in the area of concern. It is recommended that personnel performing monitoring on the landfill cover system and lysimeters have a minimum of 10 years of landfill cover experience and be a registered professional engineer. The agencies responsible for groundwater monitoring and maintenance must have direct knowledge of the site and adequate training to perform the duties. Key entities for the monitoring of the Lee Acres Landfill are as follows: (1) a Bureau of Land Management (BLM) hired contractor with qualifications and experience in landfill covers will perform monitoring of the landfill cover system; (2) the United States Geological Survey (USGS) will be retained under a task order to perform groundwater monitoring; (3) the County of San Juan, New Mexico will perform maintenance activities. All of these functions will be performed under the direction of the BLM. The landfill monitoring contractor will be required to have at least 10 years of experience in the landfill cover field and be a registered professional engineer (PE). The USGS has been performing the groundwater monitoring and does so at many sites. The County of San Juan will construct the landfill and has similar expertise in various other county facilities. All County of San Juan maintenance activities will be performed under the direction of BLM cap monitoring contractor or the BLM Project Manager.

Table 1. Lee Acres Landfill Monitoring Schedule.

Monitoring Component Initial Monitoring Frequency(1) Methods

Cover System Vegetation Quarterly Visual Cover System Erosion Quarterly Visual Cover System Human Intrusion Quarterly Visual Cover System Bio-intrusion Quarterly Visual Cover System Subsidence Quarterly Visual Cover System Ponding Quarterly Visual Cover System Slope Stability Quarterly Visual Cover System Drainage Outlets Quarterly Visual Lysimeter Percolation Measurements Quarterly Measured

(1.3mm/yr max.)

Surface-Water Management System Quarterly and After

Major Storms Visual

Perimeter Security (fence, gate, locks) Quarterly Visual

Road Integrity in relation to Cover System Quarterly Visual

Groundwater Monitoring System (USGS) Semi-annually(2) System Check

1) The monitoring will be performed quarterly for the first two years after installation of the final landfill cover. After this two-year period and if all systems are performing satisfactorily, the monitoring will be performed on a semi-annual basis for three more years. Again, if the cover is performing satisfactorily, after this five-year period, the BLM and EPA may negotiate to reduce the type and frequency of monitoring.

2) The groundwater monitoring wells are monitored semi-annually. This monitoring frequency will remain constant for the five-year post-construction period. If at the end of the five-year post-construction period the contamination levels have dropped below New Mexico State Standards the monitoring will increase to quarterly for a period of 8 consecutive quarters in order to comply with regulations found at NMAC 20.6.2.4103 D.

Table 2. Post-Closure Monitoring Form for the Lee Acres Landfill

Site Name: Lee Acres Landfill Date of Inspection:

City: Farmington Weather:

State: New Mexico Temperature:

EPA Region: 6 ID#: NMD9870750020 Inspector:

ITEM REMARKS

COVER SYSTEM SURFACE

1. SETTLEMENT (LOW SPOTS) Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

2. CRACKS Yes ( ) No ( ) Location (indicate on site map):

Length:

Width:

Depth:

3. EROSION Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

4. HOLES Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

Suspected Cause (Rodent or Other):

5. VEGETATIVE COVER Yes ( ) No ( ) Grass: Yes ( ) No ( ) Condition:

Trees/Shrubs: Yes ( ) No ( ) Location (indicate on site map):

Size:

6. GRAVEL/SOIL ADMIXTURE COVER

SURFACE

Yes ( ) No ( ) Condition:

7. WET AREAS Yes ( ) No ( ) Ponding: Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

8. SLOPE INSTABILITY Yes ( ) No ( ) Slides: Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Probable Slide Interface:

Suspected Cause:

d

LANDFILL COVER FLUX

1. Lysimeter Functioning Properly Yes ( ) No ( ) Problems Found:

Location (indicate on site map):

2. North Lysimeter – Flux below 1.3mm/yr: Yes ( ) No ( ) Measured Amount: __________ Flux Measured on Annual Basis: _______________ Monitoring measurement and graphs attached.

3. South Lysimeter – Flux below 1.3mm/yr: Yes ( ) No ( ) Measured Amount: __________ Flux Measured on Annual Basis: _______________ Monitoring measurement and graphs attached.

DRAINAGE CHANNELS

1. SETTLEMENT Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

2. MATERIAL DEGRADATION Yes ( ) No ( ) Material Type:

Location (indicate on site map):

Areal Extent:

Degree of Degradation:

3. EROSION Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

4. UNDERCUTTING Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

5. OBSTRUCTIONS Yes ( ) No ( ) Type:

Location (indicate on site map):

Areal Extent:

Size:

6. VEGETATIVE GROWTH Yes ( ) No ( ) Type:

Location (indicate on site map):

Areal Extent:

7. GEOMEMBRANE EXPOSED Yes ( ) No ( ) Condition:

Location (indicate on site map):

Areal Extent:

COVER PENETRATIONS

1. MONITORING WELLS Yes ( ) No ( ) Condition:

Location (indicate on site map):

Cover Disturbance: Yes ( ) No ( ):

Type of Disturbance (Leak, Erosion, etc.):

Condition:

PERIMETER DITCHES/OFF-SITE DISCHARGE

1. SILTATION Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

2. VEGETATION GROWTH Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Type:

3. EROSION Yes ( ) No ( ) Location (indicate on site map):

Areal Extent:

Depth:

4. DISCHARGE STRUCTURE Yes ( ) No ( ) Functioning: Yes ( ) No ( ) Condition:

FENCING

1. FENCING DAMAGE Yes ( ) No ( ) Location (indicate on site map):

Description of damage:

ROAD

1. ROAD DAMAGE Yes ( ) No ( ) Location (indicate on site map):

Description of damage:

Impact on Cover Yes ( ) No ( ) Description of Impact:

SITE ACCESS

1. ACCESS RESTRICTION Yes ( ) No ( ) Description:

GENERAL

1. VANDALISM Yes ( ) No ( ) Location (indicate on site map):

Description of damage:

2. CHANGED SITE CONDITION Yes ( ) No ( ) Description:

3. LAND USE CHANGE Yes ( ) No ( ) Description: