File 3 Draft Post Constr OM and M 8 20.PDF

DRAFT

POST-CONSTRUCTION OPERATION AND MAINTENANCE PLAN

Site 1 – Former Drum Marshalling Area

Naval Weapons Industrial Reserve Plant

Bethpage, New York

Contract Number: N62470-16-D-9004

Contract Task Order: N4008518F6147

Document Control Number: APTIM-9004-F6147-0011

August 2020

Submitted to:

NAVFAC Mid-Atlantic 1510 Gilbert Street, Building N26 Norfolk, VA 23511

Submitted by:

Aptim Federal Services, LLC 150 Boush Street, Suite 701 Norfolk, Virginia 23510

DRAFT

POST-CONSTRUCTION OPERATION AND MAINTENANCE PLAN

Site 1 – Former Drum Marshalling Area

Naval Weapons Industrial Reserve Plant

Bethpage, New York

Contract Number: N62470-16-D-9004

Contract Task Order: N4008518F6147

Document Control Number: APTIM-9004-F6147-0011

August 2020

Prepared by: __________________________________ Date: ___________________ Bill Squire, P.G Project Senior Scientist

Reviewed by: __________________________________ Date: ___________________ Monica L. Smeal, P.E.

Deputy Project Manager

Approved by: __________________________________ Date: ___________________ William L. Deane, Jr., P.E.

Project Manager

Draft Operation and Maintenance Plan i August 2020

Table of Contents ________________________________________________

Table of Contents ........................................................................................................................................... i List of Figures ................................................................................................................................................. ii List of Appendices .......................................................................................................................................... ii Acronyms and Abbreviations ......................................................................................................................... iii

1.0 Introduction ..................................................................................................................................... 1-1

1.1 Project Summary and Scope of Work ................................................................................... 1-1

1.2 O&M Plan Organization ........................................................................................................ 1-2

1.3 Site Safety ............................................................................................................................ 1-2

1.4 Site Description and History ................................................................................................. 1-2

2.0 Regulatory Framework .................................................................................................................... 2-1

2.1 Regulatory Process .............................................................................................................. 2-1

2.2 Post-Construction Maintenance Objectives .......................................................................... 2-1

3.0 Operation and Maintenance ............................................................................................................ 3-1

3.1 Components ......................................................................................................................... 3-1

3.2 Schedule .............................................................................................................................. 3-1

3.3 Inspections ........................................................................................................................... 3-2

3.3.1 Inspection Checklists ............................................................................................... 3-2

3.3.2 Site Inspections ....................................................................................................... 3-2

3.3.3 Soil Cover Inspections ............................................................................................. 3-2

3.3.4 Drainage Inspections ............................................................................................... 3-3

3.3.5 Significant Storm Events ......................................................................................... 3-3

3.3.6 Fencing Inspections ................................................................................................ 3-3

3.3.7 Vegetation Inspection .............................................................................................. 3-3

3.3.8 Asphalt Inspection ................................................................................................... 3-3

3.4 Maintenance ......................................................................................................................... 3-4

3.4.1 Soil Cover Maintenance .......................................................................................... 3-4

3.4.1.1 Settlement/Subsidence Areas ................................................................... 3-4

3.4.1.2 Berm or Slope Stabilization ....................................................................... 3-5

3.4.1.3 Erosion and Erosion Control Measures ..................................................... 3-5

3.4.1.4 Vegetation Re-Seeding or Replacement ................................................... 3-5

3.4.2 Drainage Control System Maintenance ................................................................... 3-6

3.4.3 Fencing Maintenance .............................................................................................. 3-6

3.5 Contractor Inspection Report ................................................................................................ 3-6

4.0 References ..................................................................................................................................... 4-1

Draft Operation and Maintenance Plan ii August 2020

List of Figures __________________________________________________

Figure 1 General Location Map Figure 2 Site Location Map Figure 3 O&M Site Features (Pending Final Topographic Survey)

List of Appendices _______________________________________________

Appendix A Project Specifications Appendix B Inspection Checklists

Draft Operation and Maintenance Plan iii August 2020

Acronyms and Abbreviations _____________________________________

APTIM Aptim Federal Services, LLC CERCLA Comprehensive Environmental Response, Compensation, and

Liability Act ER Environmental Restoration NAVFAC Naval Facilities Engineering Command Navy U.S. Department of the Navy NCP National Oil and Hazardous Substances Pollution Contingency Plan NWIRP Naval Weapons Industrial Reserve Plant NYSDEC New York State Department of Environmental Conservation O&M Operation and Maintenance OU Operable Unit PAH Polynuclear Aromatic Hydrocarbon PCB Polychlorinated Biphenyl ROD Record of Decision SARA Superfund Amendments and Reauthorization Act of 1986 TAGM Technical and Administrative Guidance Memorandum USACE United States Army Corps of Engineers UST Underground Storage Tank VOC Volatile Organic Compound

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Draft Operation and Maintenance Plan 1-1 August 2020

1.0 Introduction

This Operation and Maintenance (O&M) Plan for post-construction maintenance presents the specific tasks and procedures that will be implemented by Aptim Federal Services, LLC (APTIM) following completion of the remedial action (construction) for Site 1 at Naval Weapons Industrial

Reserve Plant (NWIRP) Bethpage in Bethpage, New York (APTIM, 2019). The remedial action, including O&M, is being performed for the U.S. Department of the Navy (Navy) Naval Facilities

Engineering Command (NAVFAC) Mid-Atlantic, under Contract No. N62470-16-D-9004, Contract Task Order N4008518F6147. This work is being performed under the Navy

Environmental Restoration (ER) Program.

The remedial action (construction) was executed between March 2019 and August 2020 to fulfill the requirements outlined in the Operable Unit (OU) 4 Record of Decision (ROD) (Navy, 2018) in accordance with the Final Remedial Design (Tetra Tech, 2019), the Comprehensive

Environmental Response, Compensation and Liability Act (CERCLA), and the National Oil and

Hazardous Substances Pollution Contingency Plan (NCP).

The O&M performed at Site 1 will be executed to fulfill the requirements of the Performance Work

Statement dated 13 June 2018 (NAVFAC, 2018). Post-construction maintenance will be performed as detailed in Section 02 01 51 of the Project Specifications (Appendix A).

1.1 Project Summary and Scope of Work

The scope of work for O&M is to perform post-construction maintenance for a period of 30-months following completion of on-site work and final acceptance of construction activities, including:

Maintain the integrity and effectiveness of the remedy, including making repairs to the soil cover as necessary to correct the effects of settling, subsidence, erosion, or other damage;

Prevent storm water runoff from eroding or otherwise damaging the soil cover;

Maintain erosion and sediment controls, as needed;

Remove accumulated sediment from erosion and sediment controls as needed to ensure sufficient retention;

Maintain the storm water management system including channels, culverts, perimeter ditches, letdown structures, rip rap, slope protection, and inlet and outlet protection; and

Draft Operation and Maintenance Plan 1-2 August 2020

Maintain the integrity and effectiveness of the chain-link security fence, wooden privacy fence, and gates installed under this contract.

APTIM will provide NAVFAC a written notice 30-days prior to the date of intended transfer of site monitoring and maintenance responsibility.

1.2 O&M Plan Organization

This O&M Plan consists of the following sections and provides descriptions of the specific activities involved in the implementation of the remedial action. This O&M Plan is organized as follows:

Section 1.0, Introduction—Section 1.0 provides an introduction, project summary and scope of work, O&M Plan organization, site safety, and site description and history.

Section 2.0, Regulatory Framework—Section 2.0 describes the regulatory process and Post-Construction Maintenance objectives.

Section 3.0, Operation and Maintenance—Section 3.0 describes the O&M components, schedule, inspections, maintenance, and reporting.

Section 4.0, References—Section 4.0 includes a list of documents used to compile this O&M Plan.

Appendix A, Project Specifications

Appendix B, Inspection Checklists

1.3 Site Safety

Post-construction maintenance field activities will be conducted in accordance with the U.S. Army

Corps of Engineers (USACE) Safety and Health Requirements Manual EM 385-1-1 (2014), the

Unified Facilities Guide Specifications Section 01 35 26 Governmental Safety Requirements

(NAVFAC, 2012), and the Accident Prevention Plan, Site 1 – Former Drum Marshalling Area

Remedial Action for Contaminated Soil, Naval Weapons Industrial Reserve Plant, Bethpage, New

York (APTIM, 2019).

1.4 Site Description and History

The former NWIRP Bethpage was located adjacent to the Grumman facility, and was operated by

Grumman and later Northrop Grumman from 1942 to the mid-1990s. The plant’s primary mission was the research prototyping, testing, design engineering, fabrication, and primary assembly of military aircraft. In 1996, operations ended at the facility. At that time, the NWIRP was approximately 109.5-acres in size. In 2002, 4.5-acres of the property were transferred to Nassau

County. In February 2008, the Navy transferred an additional 96-acres of the remaining 105-acre

Draft Operation and Maintenance Plan 1-3 August 2020 main parcel to Nassau County. The remaining nine-acre parcel is being retained by the Navy for environmental investigation and remediation.

From the early 1950s to 1978, drums containing liquid wastes were stored on a cinder-covered area over a cesspool leach field. This leach field may have been used to discharge process wastewater. In 1978, the drum storage area was moved a few yards to the south to a 100- by 100-

ft. concrete pad. In 1982, the drum storage area was moved to its present location at Site 3.

Transformers and polychlorinated biphenyl (PCB)-filled autoclaves were also stored at the site.

The waste drums reportedly contained chlorinated and non-chlorinated solvents, and liquid cadmium and chromium wastes. In addition, underlying most of Site 1 are approximately 120 abandoned cesspools that were designed to discharge sanitary wastewaters from Plant No. 3 that were in use from the early 1950s to 1978. These cesspools were approximately 10-ft. in diameter and 16-ft. deep. Based on field observations, the cesspools were filled with soil between 1978 and

1986. It is possible that non-sanitary wastes may have been discharged into this system. The drum marshalling areas and the leach field were the initial extent of Site 1.

The site was originally identified and investigated as part of the facility-wide investigations. A

ROD for Site 1 soil was signed in 1995 to address PCB- and volatile organic compound (VOC) -contaminated soil. Residual soil contamination noted in the ROD consists of metals, VOC, polynuclear aromatic hydrocarbon (PAH), and PCBs at concentrations greater than protective levels listed in Technical and Administrative Guidance Memorandum (TAGM) 4046. Levels of these constituents also exceed the New York State Department of Environmental Conservation

(NYSDEC) Part 375 Soil Cleanup Objectives, an Applicable or Relevant Appropriate

Requirements promulgated in 2006. Groundwater contamination above the TAGM 4046 and Part

375 NYSDEC Cleanup Objectives consisting of metals, VOCs and PAHs was also noted in the

ROD.

In June/July 2009, buildings, tanks, and concrete aprons within the fenced portion of Site 1 were demolished and disposed/recycled off-site.

In 2012, at the request of the property lessors to allow additional parking for facility tenants and with concurrence from NYSDEC, the southern section of the Site 1 interior facility fence was moved to the north approximately 100 feet and the western section of the fence was moved to the east approximately 30 ft. This new access area was covered with gravel and asphalt in accordance with the OU1 ROD, (NYSDEC, 1995). In April 2012, the current property owner, Steel Equities, uncovered two intact Underground Storage Tanks (USTs) that were found to contain residual solvent material. The USTs and contents were removed in September 2012 and post-removal soil

Draft Operation and Maintenance Plan 1-4 August 2020 samples were collected. As of 2013, the area within the interior facility fence is lightly vegetated soil.

In 2019, APTIM and its subcontractors implemented the selected remedy outlined in the OU4

ROD. The remedy included excavation and disposal of PCB-contaminated soils and installation of a reduced permeability cover to reduce leaching of contaminants from unsaturated soil to groundwater.

Draft Operation and Maintenance Plan 2-1 August 2020

2.0 Regulatory Framework

Section 104 of the CERCLA and Superfund Amendments and Reauthorization Act (SARA) of

1986 allow an authorized agency to provide for remedial or removal actions and to remove, or arrange for removal of, hazardous substances, pollutants, or contaminants at any time, or to take any other response measures consistent with the NCP as deemed necessary to protect public health or welfare and the environment. The NCP, Title 40 of the Code of Federal Regulations, Section

300, provides regulations for implementing CERCLA and SARA and regulations specific to removal actions. The NCP defines a removal action as:

[The] cleanup or removal of released hazardous substances from the environment, such actions as may be necessary to monitor, assess, and evaluate the threat of release of hazardous substances; the disposal of removed material; or the taking of such other actions as may be necessary to prevent, minimize, or mitigate damage to the public health or welfare or to the environment, which may otherwise result from a release or threat of release.

2.1 Regulatory Process

The Navy is directing this remedial action under the Navy ER Program in accordance with requirements of CERCLA and the NCP. The work has been executed in accordance with Section

121(e) of CERCLA (42 United States Code, Section 9621[e]), as amended, which states that no federal, state, or local permits will be required for the portion of any removal or remedial action conducted entirely on site. Because the work at NWIRP Site 1 has been executed to support a remedial action, permits are not required for remedial action activities conducted entirely on site;

however, all substantive requirements will be met.

2.2 Post-Construction Maintenance Objectives

The primary objective of the post-construction maintenance at Site 1 is to ensure that all erosion controls, drainage, site security and privacy fencing, and asphalt pavement installed or repaired during site activities are maintained and functioning as designed, and vegetation (grass and trees) is fully established and thriving.

Draft Operation and Maintenance Plan 2-2 August 2020

Draft Operation and Maintenance Plan 3-1 August 2020

3.0 Operation and Maintenance

This section describes the specific activities and procedures to implement the operation and maintenance requirements.

3.1 Components

O&M of Site 1 includes the following components:

Inspection o Regular inspections of soil cover, erosion controls, drainage, site security fencing, and asphalt pavement.

o Inspections following significant storm events.

o Vegetation evaluation inspections.

Maintenance o Maintenance of erosion controls, drainage, site security fencing, and asphalt pavement in response to findings from the inspections.

o Maintenance of the soil cover (e.g., settlement/subsidence) in response to findings from the inspections.

o Maintenance of vegetation (e.g., seeding, tree replacement) in response to findings from the inspections.

Reporting o Preparation of reports documenting observations from regular inspections and necessary maintenance or repairs.

3.2 Schedule

Implementation of the O&M Plan will include performing periodic inspections and normal maintenance of the soil cover, erosion control, drainage, site security fencing, asphalt pavement and vegetation. All designated site features will be inspected on a scheduled routine basis.

Inspections will be conducted monthly from months 1 through 12 and quarterly from months 13 through 30. Additional inspections will be conducted within 24 hours of each significant storm event, as needed.

Draft Operation and Maintenance Plan 3-2 August 2020

3.3 Inspections

This section details the inspections to be conducted as part of the O&M of Site 1.

3.3.1 Inspection Checklists

The Inspection Checklists for Site 1 are presented in Appendix B. These checklists will be completed during each inspection. All unsatisfactory conditions will be given an ID # and locations will be noted on Figure 3, O&M Site Features. Photographic documentation will be collected for all unsatisfactory conditions. Completed Inspection Checklists, along with any recommendations for maintenance, will be submitted to the NAVFAC.

3.3.2 Site Inspections

Site inspections will be conducted for the duration of the post-construction maintenance period, as described above in Section 3.2. Site inspections are intended to identify existing or potential problem areas at the site and to provide recommendations for any necessary maintenance or repairs. Each site inspection will be documented, using the inspection checklists (Appendix B).

Checklists will be incorporated into the Contractor Production Report, which will be submitted to the NAVFAC.

Inspections will consist of a site walk, including a visual examination of the integrity of the soil cover, erosion control measures, drainage, site security/privacy fencing, vegetation, and asphalt pavement. At a minimum, inspections will cover the items included on the Inspection Checklists in Appendix B.

3.3.3 Soil Cover Inspections

The visual inspection will include checking the soil cover for rodent damage (burrowing), settled areas of soil, and erosion damage. The location of areas exhibiting settlement/subsidence or erosion damage to the soil cover will be noted on a site map. Areas where settlement/subsidence may occur include fill areas, earthen berms, and areas where ponding water is observed. Surface erosion is a condition that allows surface water run-on or runoff to transport large amounts of soil off site, or conditions that significantly damage the vegetative cover. Surface erosion inspections include:

Integrity of erosion control measures such as straw wattles;

Identifying areas prone to erosion;

Estimating the volume of soil lost to erosion in a particular area;

Identifying up gradient sources of surface water that caused the erosion; and

Proposing and implementing corrective actions necessary to prevent future erosion.

Draft Operation and Maintenance Plan 3-3 August 2020

During field inspections of the soil cover, new locations of erosion and settlement/subsidence that may have developed since the last inspection will be noted.

3.3.4 Drainage Inspections

The visual site inspection will also include a check for the following conditions, which are detrimental to the drainage control system's function:

Damaged or blocked sections of pipes, swales, and drop inlet;

Overgrown vegetation and debris in ditches or swales which affects or prevents surface runoff;

Sediment in ditches from surface erosion of the soil cover; and

Settlement/subsidence of the soil cover over a large area which affects or prevents surface runoff.

3.3.5 Significant Storm Events

Following significant storm events, defined as rainfall that meets or exceeds 0.5 inch over a 24-hour period, the site will be inspected for storm damage to the soil cover, erosion control measures, and drainage features and for debris or vegetation (eg. fallen tree limbs) that requires removal.

Inspections will be conducted within 24 hours following the storm using the Inspection Checklists in Appendix B.

3.3.6 Fencing Inspections

The condition of newly installed chain link fence, gates, and wooden privacy fence will be inspected to ensure that the fence and gates are structurally sound and functioning as designed.

Damage to the fence and gates will be noted, and necessary repair work will be identified in the

Inspection Checklists (Appendix B).

3.3.7 Vegetation Inspection

The inspection will consist of visual observations during a systematic site walk to assess whether vegetation (grasses and trees) is fully established and thriving. A satisfactory stand of grass is defined as a cover of healthy plants, after true leaves are formed of the seed species applied, in which gaps larger than one square foot do not occur. Bare spots shall be scattered, and the total bare areas shall not comprise more than one percent of the total seeded area. Observations will be noted, and necessary replanting work will be requested in the Inspection Checklists (Appendix B).

3.3.8 Asphalt Inspection

The newly installed asphalt pavement will be inspected for cracks or any other damage. Damage to the pavement will be noted and necessary repair work will be identified in the Inspection

Checklists (Appendix B).

Draft Operation and Maintenance Plan 3-4 August 2020

3.4 Maintenance

Maintenance of the soil cover and associated structures to repair minor damage will be conducted as necessary, following site inspections. Maintenance activities will be detailed in a Contractor

Production Report submitted to the NAVFAC. With the exception of emergency repairs, O&M maintenance should only be performed after receiving approval from the NAVFAC. NAVFAC shall be notified in writing at least 10 working days in advance of conducting major maintenance activities that cannot be completed within one working day during the site inspection.

3.4.1 Soil Cover Maintenance

The vegetative cover of slopes less than 3H:1V will be mowed to develop good grass growth and control erosion. Mowing will not cut vegetative cover down to less than three inches in height and care will be taken to not create vegetation mats that hinder growth. Mowing will be performed twice during the initial 12-month O&M period, in April and October. Slopes steeper than 3H:1V will not be mowed during maintenance activities.

Other potential maintenance activities include:

Filling of settlement/subsidence areas;

Berm or slope stabilization;

Erosion and erosion control measures maintenance; and

Vegetation re-seeding or replacement.

In addition to maintenance activities, Inspection Reports may also document the need for more substantial repair activities at the site as discussed in the following subsections.

3.4.1.1 Settlement/Subsidence Areas

Settlement/subsidence areas that may require repair will be investigated to assess the cause of the displacement and the need for corrective measures. If settlement occurs that indicates potential failure of the cover (i.e., a significant depression in the cover), the damaged area will be repaired or replaced, as necessary. Repaired areas will be regraded to blend with the uniform grades and slopes of the constructed cover. If relatively minor differential settlement occurs, topsoil or aggregate as required will be placed on the affected area to bring it back to grade. The location and degree of settlement where repairs are made will be documented. If necessary, as determined by

NAVFAC, the settled area will be surveyed to measure the actual extent of settlement. In the event of continued settlement in the same area, the degree of settlement will be assessed by NAVFAC with respect to past settlement and the appropriate repair action will be implemented by APTIM after investigation.

Draft Operation and Maintenance Plan 3-5 August 2020

3.4.1.2 Berm or Slope Stabilization

During significant rainfall events, slope stability could be compromised by saturation of the soils or by erosion. Saturation may be indicated by the presence of channels, slumps in the ground surface, or large amounts of mud in the vegetative layer. If these or other conditions that may lead to slope instability are observed, temporary corrective measures should be implemented to prevent further damage. Temporary corrective measures may include placement of slope protection or erosion control devices on the berm or slope surface, including, but not limited to, the following:

Fiber rolls;

Gravel bags;

Sediment barriers at toe of slopes;

Plastic sheeting; and

Temporary perforated pipe or other measures to redirect surface water flow.

3.4.1.3 Erosion and Erosion Control Measures

Erosion identified during site inspections will be repaired as needed in a manner which provides a long-term solution to such damage. The activities required to repair erosive damage to the soil cover will depend on the extent of the erosion. Repaired areas will be revegetated in accordance with the applicable provisions of Sections 01 57 13, 31 23 00, and 32 92 19 (Appendix A).

Repaired areas will be graded to match the surrounding area.

Erosion and sediment control measures will be maintained or replaced to ensure they are functioning as designed until a satisfactory permanent stand of grass has been established (as defined in Section 3.3.7). Erosion and sediment control measures will be maintained in accordance with the Final Stormwater Pollution Prevention Plan (APTIM, 2019). Accumulated sediment from

E&S controls will be removed as needed to ensure sufficient retention.

3.4.1.4 Vegetation Re-Seeding or Replacement

Revegetation or replacement will be performed for areas noted during inspection to have poor vegetative growth and the area maintained in accordance with the applicable provisions of Sections

01 57 13, 31 23 00, 32 92 19, and 32 93 43 (Appendix A). Conditions that may require vegetation re-seeding or replacement include the following:

The grass cover has been reduced to less than 99 percent of the seeded area.

Repaired surfaces of the soil cover require new vegetation.

Trees have died.

Draft Operation and Maintenance Plan 3-6 August 2020

Procedures for preparing the ground surface, preparing the seed mixtures, applying the seed, fertilizer and mulch are described in Section 32 92 19 (Appendix A). Requirements for tree planting and watering are described in Section 32 93 43 (Appendix A).

3.4.2 Drainage Control System Maintenance

APTIM will remove debris, vegetation, or silt from the drainage control features at the site. Since the removed materials will not have contacted contaminated materials, they may be disposed of as landscaping refuse or as non-hazardous solid waste.

3.4.3 Fencing Maintenance

Routine fence and gate inspections will identify holes in the chain-link, broken or missing wooden slats in the privacy fence, erosion rills or animal burrows beneath the fence, and problems with gate operation. Repairs will be made to restore the fence or gate to its original condition. If necessary, dead or damaged branches or trees that present a threat to the fence will be removed as part of the maintenance activity. Repairs will be implemented within seven days of identification.

3.5 Contractor Inspection Report

APTIM will prepare a Contractor Inspection Report for each inspection or repair performed. Reports will include, at a minimum, completed Inspection Checklists, accident reports, if any, photographs of all unsatisfactory conditions, and documentation of any corrective measures needed or implemented since the previous inspection. The report shall also include a listing of equipment or materials used for the corrective measures and a description of the measures implemented. The

Contractor Inspection Report will be submitted to NAVFAC within seven working days after completion of maintenance/repair activities.

Draft Operation and Maintenance Plan 4-1 August 2020

4.0 References

APTIM. 2019. Remedial Action Plan, Site 1 – Former Drum Marshalling Area Remedial Action for Contaminated Soil, Naval Weapons Industrial Reserve Plant, Bethpage, New York.

APTIM. 2018. Accident Prevention Plan, Site 1 – Former Drum Marshalling Area Remedial Action for Contaminated Soil, Naval Weapons Industrial Reserve Plant, Bethpage, New York.

NAVFAC, 2012. UFGS Section 01 35 26 Governmental Safety Requirements.

NAVFAC, 2018. Remedial Action Contract N62470-16-D-9004, Attachment A, Performance Work Statement, Site 1 – Former Drum Marshalling Area Remedial Action for Contaminated Soil.

13 June

Navy. 2018. ROD OU 4 Naval Weapons Industrial Reserve Plant, Bethpage, New York.

NYSDEC, 1995. ROD OU 1 NWIRP Bethpage, NY. March

Tetra Tech, Inc. 2019. Final Remedial Design for Site 1 – Former Drum Marshalling Area, Naval Weapons Industrial Reserve Plant, Bethpage, New York.

USACE, 2014. Safety and Health Requirements Manual EM 385-1-1.

Draft Operation and Maintenance Plan 4-2 August 2020

Figures

Figure 1 General Location Map

Figure 2 Site Location Map

Figure 3 O&M Site Features (Pending Final Topographic Survey)

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Appendix A

Project Specifications

Site 1 – Former Drum Marshalling Area Post-Construction Maintenance Tetra Tech Project No. 112G08005 02 01 51 - 1 January 2019

SECTION 02 01 51

POST-CONSTRUCTION MAINTENANCE

PART 1 GENERAL

1.01 SUMMARY

A. Section includes post-construction maintenance of the Site for a period of 30 months from completion of on-Site Work and final acceptance of site construction activities.

B. NAVFAC to provide an O&M Plan to Contractor prior to initiating the 30 month maintenance period. NYSDEC approval of the O&M Plan is expected within 6 months of completion of on-site Work and final acceptance of site construction activities.

C. Related Sections:

1. Section 31 23 00 - Excavation and Fill

2. Section 32 92 19 – Seeding

3. Section 02 93 43 - Trees

1.02 SUBMITTALS

A. Submit the following for review and approval during the Work:

1. Inspection reports

Contractor shall prepare a report for each inspection or repair performed in a format approved by NAVFAC and Engineer. These reports shall be submitted to the Engineer within seven calendar days of performing the inspection or repair.

1.03 MAINTENANCE REQUIREMENTS

A. The Contractor shall be responsible for the post-construction maintenance of the site in accordance with the requirements of this section for a period of 30 months from completion of on-site Work and final acceptance of site construction activities. Date of completion of on-site Work will be determined by the Engineer. The Contractor shall be responsible for all costs associated with operating equipment and to maintain the integrity of the site and any portions of the work. Specifically, but not limited to, the Contractor shall:

1. Maintain the integrity and effectiveness of the remedy, including making repairs to the soil cover as necessary to correct the effects of settling, subsidence, erosion, or other damage.

2. Prevent storm water runoff from eroding or otherwise damaging the soil cover.

3. Maintain erosion and sediment controls, as needed.

4. Remove accumulated sediment from erosion and sediment controls as needed to ensure sufficient retention.

Tetra Tech Project No. 112G08005 02 01 51 - 2 January 2019

5. Maintain the storm water management system including channels, culverts, perimeter ditches, letdown structures, rip rap, slope protection, and inlet and outlet protection.

6. Maintain the integrity and effectiveness of the chain-link security fence and gates installed under this contract.

1.04 NOTIFICATION

A. The Contractor shall notify NAVFAC in writing 30 days prior to the date that the Contractor intends to transfer site monitoring and maintenance responsibility over to NAVFAC.

1.05 MAINTENANCE

A. During the maintenance period following the completion of construction, the following shall be addressed:

1. Cover Maintenance. The vegetative cover of slopes less than 3H:1V shall be mowed to develop good grass growth and control erosion. Mowing shall not cut vegetative cover down to less than three inches in height and care shall be taken to not create vegetation mats that hinder growth. A minimum of 2 mowing events will be performed during the initial 12-month operation and maintenance period. Slopes steeper than 3H:1V will not be mowed during maintenance activities. Revegetation shall be performed for areas noted during inspection to have poor vegetative growth and the area maintained in accordance with the applicable provisions of Sections 01 57 13, 31 23 00, and 32 92 19.

2. Erosion Control Maintenance. Erosion identified during site inspections shall be repaired as needed in a manner which provides a long-term solution to such damage as approved by

Engineer. The activities required to repair erosive damage to the soil cover will depend on the extent of the erosion. The disturbed area shall be revegetated in accordance with the applicable provisions of Sections 01 57 13, 31 23 00, and 32 92 19. The final grades of all repaired areas shall conform to the grades and slopes indicated on the Drawings.

3. Settlement and Subsidence Control. Settled areas that may require repair shall be investigated to assess the cause of the displacement and the need for corrective measures. If settlement occurs that indicates potential failure of the cover (i.e., a significant depression in the cover), the damaged area shall be repaired or replaced, as necessary. Repaired areas shall be regraded to blend with the uniform grades and slopes of the constructed cover. If relatively minor differential settlement occurs, topsoil or aggregate as required shall be placed on the affected area to bring it back to grade. The location and degree of settlement where repairs are made shall be documented. If necessary as determined by the Engineer, the settled area shall be surveyed to measure the actual extent of settlement. In the event of continued settlement in the same area, the degree of settlement will be assessed by the Engineer with respect to past settlement and appropriate repair action implemented by the Contractor after investigation.

Repairs may include among other options, placing fill or aggregate, re-establish original

Tetra Tech Project No. 112G08005 02 01 51 - 3 January 2019 grades, and vegetating disturbed areas.

4. Fence Maintenance. Routine fence and gate inspections will identify holes in the chain-link and erosion rills or animal burrows beneath the fence. Repairs shall be implemented within seven days of identification. Routine fence maintenance will include removing trees which fall over fence. Fence repairs shall be made to restore the fence to its original condition.

1.06 MAINTENANCE INSPECTIONS

A. All designated site features shall be inspected on a scheduled routine basis. Frequency of inspection shall be monthly from months 1 through 12 and quarterly from months 13 through 30.

Additional inspections shall be conducted within 24 hours of each rainfall event that meets or exceeds 0.5 inch over a 24-hour period, as needed.

1.07 NOTIFICATION

A. The Contractor shall notify the Engineer in writing at least 10 working days in advance of conducting major maintenance activities. Major maintenance activities shall be defined as those activities that cannot be completed within one working day during the site inspection. The Contractor shall identify the maintenance activities to be conducted and the personnel, equipment, and materials that will be used to conduct the required maintenance. The Engineer will, at his discretion, approve the maintenance activity, or provide the Contractor with alternative specifications for the repairs to be conducted.

1.08 REPRESENTATION

A. A representative of NAVFAC may be present on site to witness maintenance activities.

NAVFAC’s representative will determine whether the maintenance activities have been completed in a manner acceptable to NAVFAC.

1.09 REPORTING

A. The Contractor shall prepare inspection reports that include, at a minimum, a completed Inspection Form, accident reports, if any, and documentation of any corrective measures needed or implemented since the previous inspection. The report shall also include a listing of equipment or materials used for the corrective measures and a description of the measures implemented. The Inspection Form shall be submitted to the Engineer within seven working days after completion of maintenance/repair activities.

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

Not used.

END OF SECTION

Appendix B

Inspection Checklists

POST-CONSTRUCTION MAINTENANCE INSPECTION CHECKLIST

Site 1 - NWIRP Bethpage

Bethpage, New York

1All unsatisfactory conditions will be given an ID # and noted on Figure 3, O&M Site Features.

2Photographic documentation will be collected for all unsatisfactory conditions.

PAGE 1 - CHECKLIST

Item Satisfactory Unsatisfactory1,2 ID #1,2

1. Security Control System

a. Signs (No physical disturbance, vehicular traffic on roads only)

b. Locks on gates

2. Soil Cover System

a. Erosion

b. Sedimentation

c. Settlement/Subsidence

d. Physical Disturbance or Rodent

Burrowing

3. Storm Water Management

a. Channels

b. Ponded Water

c. Swales

d. Storm Drain Inlets/Manholes

4. E&S Measures

a. Wattles

b. Sediment Accumulation

5. Access Roadways/Parking Areas

a. Erosion

b. Subgrade

c. Asphalt Road Surface

d. Gravel Parking Area

6. Berm Side Slopes

a. Erosion

b. Physical Disturbance

c. Slumps

7. Fencing (chain link/wood privacy)

a. Condition

b. Erosion/Burrowing Underneath

c. Vegetation Growth

d. Gates Operable

Bethpage, New York

PAGE 2 – CHECKLIST

8. Notes and Comments on Unsatisfactory Items (attach additional sheets if necessary)

Inspected by Date of Inspection

Bethpage, New York

1All unsatisfactory conditions will be given an ID # and noted on Figure 3, O&M Site Features.

2Photographic documentation will be collected for all unsatisfactory conditions.

Inspector Name: __________________________________

Inspection Date: __________________________________

Inspection Type: Monthly (________) Quarterly (________) Post-rainfall (________)

ID #1,2

Observed Conditions

Comment or Recommended Actions

Environmental Features Vegetation Features

Surface Erosion

Rodent Burrows

Total Grass Cover (%)

Tree Health

Invasive Species

Cover of Re-seeded

Areas

3.5 Contractor Inspection Report

General Location Map Figure 2 Site Location Map

Appendix A Project Specifications

SECTION 02 01 51

Appendix B Inspection Checklists