B08_Solicitation_Attachment_1_Statement_of_Work.docx

United States Department of the Interior

National Park Service Minute Man National Historical Park 174 Liberty Street Concord, MA 01742

STATEMENT OF WORK

Contract No:

Title: Rehabilitate Historic Fields at Minute Man National Historical Park AGENCY AND REFERENCE: National Park Service, PMIS 162869B, PEPC 132580 DATE: July 2, 2026 CONTRACT TERM/PURCHASE ORDER PERIOD: Base Contract with Two Options, 405 days NAICS CODE: 561730 – Landscaping Services TYPE OF CONTRACT: Firm-Fixed-Price

TABLE OF CONTENTS

LIST OF DRAWINGS AND TABLES

Figures

Tables

ATTACHMENTS: NPS PROJECT FORMS

1. Contract Price Schedule Template for Bid Submittal……………………………….…..…A-1

2. Safety and Accident Prevention Plan Template for reference…………………………..… A-2

Areas Maps and Tasks-Attachments

Option Locator Maps

SECTION 1.0. GENERAL

1.1 Purpose of Contract: The purpose of this contract is to rehabilitate and restore historic fields within Minute Man National Historical Park (Park), the site of the first running battle of the American Revolution, April 19, 1775. The work areas within the Park are located in the towns of Concord, Lincoln, and Lexington, Middlesex County, Massachusetts. The requirement involves managing vegetation to perpetuate the 1775 historic battle scene and implementing treatment recommendations in the Park’s Cultural Landscape Reports and Park planning documents. The Park is managed by the United States Department of the Interior, National Park Service (Government).

1.2 Applicable Laws and Regulations: All work of this contract shall be performed in accordance with applicable laws, ordinances, rules, regulations, and standards. For clarification of any contract requirements, please consult the Contracting Officer (CO) and the Contracting Officer Representative (COR).

a. The Contractor shall be responsible for their own transportation to and throughout the Park. The Contractor shall follow all federal, state, and local laws when operating motor vehicles and ensure vehicles are inspected and registered to operate on public roads.

b. The Contractor shall follow all safety regulations pertaining to use of motorized equipment including handling of flammable fuels utilized for landscape services.

c. The Contractor is responsible for the removal and pruning of trees, shrubs, and vines, some of which are invasive species using approved mechanical or manual methods in accordance with Occupational Safety and Health Administration (OSHA), American National Standards Institute (ANSI), International Society of Arboriculture (ISA), EPA and USDA guidelines. The Contractor shall adhere to federal, state, and local laws and regulations to fully comply with this requirement.

d. The Contractor shall provide all applicable Personal Protective Equipment (PPE) to contract employees consistent with federal, state, and local laws.

e. The Contractor is responsible for offsite disposal of all waste generated by this project in accordance with federal, state, and local regulations as Detailed under Section 2.0, Requirements and Section 4.0, Submittals, and Section 11, Division A.

1.3 Project Summary: The Selected Contractor shall furnish labor, equipment, materials, transportation, and supervision to perform all operations required to complete the project as detailed in the requirements, scope of work, specifications, and site plans. The contract will be awarded a base project (with two options). The period of performance extends for 14 months (405 days) and through two growing seasons due to the weather and environmental considerations associated with the field work. Specific objectives include:

a. Remove piles of brush, soil, rubble, fencing, and debris. Selectively grade previously disturbed areas to restore historic fields.

b. Install erosion and sediment control where work involves soil disturbance within wetland buffer areas.

c. Remove standing and collapsed dead trees (mostly ash) along field edges that are dangerous to visitors and staff, dead leaning trees and shrubs, invasive plants, particularly vine-covered trees and shrubs.

d. Cut invasive vines, shrubs, forbs, and grasses in fields and field edges using mechanical or manual methods.

e. Restore meadows of native grasses and forbs (wildflowers) and meadow edges and perpetuate as Class C mow able areas. Seed areas with soil amendments to improve germination and establishment.

f. Remove abandoned agricultural fencing and gates to improve management of grazing fields and fields no longer in grazing program. Install temporary safety fence then remove fencing associated with inground pool.

g. Protect cultural and natural resources including archeological resources, wetland resources, as well as bird nesting, shelter, and forage sites, with use of suitable equipment, erosion controls, scheduling, and minimal ground disturbance.

h. Option: Remove abandoned inground pool, concrete basketball court, and associated plumbing, fill depression with gravel, and surface with existing topsoil to restore historic field setting of Barrett Farm.

i. Option: Remove vines, shrubs, brush piles, and collapsed trees from edge of park with vacant house to restore setting of Parker’s Revenge Battle.

1.4 Area Map

Figure 1. Map of Minute Man National Historical Park consisting of four units: Barrett Farm in Concord, North Bridge in Concord, The Wayside in Concord, and Battle Road in Concord, Lincoln, and Lexington, Massachusetts.

1.5 Description of Site: Minute Man National Historical Park located in Concord, Lincoln, and Lexington, Massachusetts preserves the sites associated with the first battles of the American Revolution. The Park includes four units that cover about 1,100 acres and includes 44 historic buildings and structures. Key attractions in Concord include the Barrett Farm, the destination of the British on April 19, 1775; the North Bridge over the Concord River, where British and colonial militia first exchanged fire; and The Wayside, a historic property that was home to authors Louisa May Alcott, Nathaniel Hawthorne, and Harriet Lothrop (Margaret Sidney). Spanning Concord, Lincoln, and Lexington is the Park’s Battle Road Unit, which includes the 5-mile Battle Road Trail. The trail connects key sites from the running battle, allowing visitors to walk the historic route taken by both colonial militia and British troops. Along the trail are original houses and taverns that date back to the 1700s. The Park attracts over one million visitors a year and hosts various events throughout the year, including tactical demonstrations and educational programs, and is actively involved in commemorating the 250th anniversary of the American Revolution.

1.6 Navigation Addresses

· Barrett Farm Unit, 448 and 474 Barrett’s Mill Road, Concord

· North Bridge Unit Park Headquarters, 174 Liberty Street, Concord

· North Bridge Comfort Station, 313 Monument Street, Concord

· Burke House and Fields, 55 Old Bedford Road, Concord

· Meriam’s Corner parking lot, 751 Lexington Road, Concord

· Farm Lane, Manuel – Stow Area, 895 Lexington Road, Concord

· Brooks Village parking lot, 1195 Lexington Road, Concord

· Hartwell Tavern parking lot, 112 North Great Road, Lincoln

· Ranger Station, Rego House, 101 North Great Road, Lincoln

· Paul Revere Capture parking lot, 180 North Great Road, Lincoln

· Minute Man Visitor Center, public parking lot, 210 North Great Road, Lincoln

· Minute Man Visitor Center, staff parking: 22 Marrett Street, Lexington.

· Park-owned Residence, 8 Airport Road, Lincoln

· Fiske Hill parking lot, 22 Old Mass Ave, Lexington

· Ebenezer Fiske House Site and parking lot, 3 Old Mass Ave, Lexington

1.7 Drawings and Tables: Cultural landscape area maps and tables illustrate and itemize contract tasks Figure 2 is a site index for each Map Area.

1.8 Pre-Bid Conference and Project Walk Through for Bidding: Contractors are expected to visit the project sites prior to bidding and be thoroughly familiar with the conditions of the work. The sites may be inspected informally daily between 7:00 am and 3:30 pm. A Pre-bid conference and site visit/project walk through with an NPS representative shall be arranged in advance, through the Park Contact, at a date and time posted by the Contract Specialist.

1.9 Bids: Bid submissions shall be submitted using the Contract Price Schedule template in Attachment 1.

1.10 Payment: Payment to the Selected Contractor shall be made upon satisfactory completion of services in each area listed in the Bid sheet and concurrence by Contract Officer. An invoice shall be provided to the CO and COR via email for review and approval before being submitted via Invoice Processing Platform (IPP) for payment. Payment form template is in Attachment 1. See also Section 4.0, Submittals.

1.11 Base and Options: The base tasks shall commence on August 22, 2026 and be completed by September 30, 2027. Option A, if exercised, shall commence on August 22, 2026 and be completed by January 31, 2027. Options B, if exercised, shall commence on August 22, 2026 and be completed by September 30, 2027. Exercise of the options is at the sole discretion of the Government. Dates of service detailed in Section 8.0, Period of Performance.

END OF SECTION 1.0 GENERAL

SECTION 2.0 REQUIREMENTS

a. For crane use or other equipment with a telescoping arm, the Contractor shall employ a Massachusetts certified crane operator with a hoisting license is required Hoisting Engineer (HE 2A and 1B) with current operating license(s) provided as part of bid and as part of Safety and Accident Prevention Plan—see Section 4.0, Submittals.

b. For specialty mowing equipment such as boom with flail or mulcher, or similar, the Contractor shall employ a certified operator for specialty mowing equipment is required. Current operating license(s) provided as part of bid and as part of Safety and Accident Prevention Plan—see Section 4.0, Submittals.

c. For work to be done within ten feet of, or adjacent to utility lines and corridors, the Contractor will employ a Certified Arborist and crew who are trained and compliant with ANSI Z133 safety standards for tree care works and ANSI A300 pruning standards. Provide certification as part of bid and as part of Safety and Accident Prevention Plan—see Section 4.0, Submittals.

d. For demolition work, the Contractor will demonstrate knowledge of and comply with safety requirements for demolition, ANSI A10.6-90.

e. For hauling and disposal, the Contractor shall demonstrate knowledge of and comply with safety requirements for hauling and disposing, ANSI/ASSE A10.6 and NFPA 241.

f. For tree pruning, assessment, or root disturbance the Contractor will employ a Certified Arborist (with current certification provided as part of bid and as part of Safety and Accident Prevention Plan – see Section 4.0, Submittals) by the International Society of Arboriculture (ISA) shall always be on site during work effort for tree pruning, assessment, or root disturbance and shall direct all work on the ground or in a bucket truck.

g. For crane use or other equipment with a telescoping arm, the Contractor shall employ a Massachusetts certified crane operator with a hoisting license is required Hoisting Engineer (HE 2A and 1B) with current operating license(s) provided as part of bid and as part of Safety and Accident Prevention Plan—see Section 4.0, Submittals and Attachment 2 template.

2.10 Safety Apparel & Dress Code: All contracted employees shall wear, at a minimum, a class II high visibility vest plus eye and ear protection while conducting field rehabilitation services. Contracted employees shall avoid wearing apparel that includes offensive language or partisan messaging while working within the Park.

END OF SECTION 2.0 REQUIREMENTS

SECTION 3.0 SCOPE OF WORK

3.1 Description of Work Sites: Minute Man National Historical Park is located in the towns of Concord, Lincoln and Lexington, Massachusetts. The Park requires field rehabilitation services to be provided at multiple locations throughout the Park with varying frequencies throughout the year based on operational needs. In total, approximately 18 acres of fields and former fields are included in this rehabilitation contract. Fields vary in density of vegetation but all are subject to some degree of stone composition that may make mowing more challenging. All listed acreages are approximate. Detailed tasks for each location are shown on Area/Task Maps 1 through 8 and Options A and B for each Cultural Landscape area and included in Section 11, Table 3, Specifications by Division.

Table 1 Scope of Work – Work Sites, Addresses, Tasks by Division

Areas A.

Demo & Grading B. Erosion Control

Stump Grindng D.

Field Mowing

Fence Remvl

1. Barrett Farm Barretts Mill Road, Concord

X

2. North Bridge Liberty & Monument Sts, Concord

X

3. Meriam Corner Lex & Old Bedford Rds, Concord

X

X

4. Olive Stow 895 & 955 Lex Rd, Concord

X

6. Elm Brook, Hartwell Tavern 112 North Great Road, Lincoln

X

7. Paul Revere Capture Area 180 North Great Road, Lincoln

X

X

8. Fiske Hill 3 Old Mass Ave, Lexington

Option A. Barrett Farm Barretts Mill Road, Concord

X

Option B. Nelson Whittemore 8 and 12 Airport Road Lincoln

A summary of work tasks is listed below and further detail is provided after Division A through F and Table 3.

A. Demolition and Grading

· Remove stockpiled topsoil, brush, rubble, debris, and grade for seeding

· Remove piles of soil, brush, rubble

· Option A: Demolish and Fill Inground Pool to restore the field

· Obtain Building Demolition Permit from Town of Concord

· Cap utilities at house (electric, water, gas)

· Drain pool, stockpile surrounding topsoil

· Demo pool shell and remove top 36 inches plus remove basketball deck, puncture remaining sides and floor

· Compact in lifts, backfill with clean gravel, replace topsoil, grade

· Close out Building Demolition Permit with Town of Concord

B. Erosion and Sedimentation Control

· Install erosion and sediment control between work areas and designated wetlands.

· Remove upon completion of work and in accordance with detailed project specifications.

C. Tree, Shrub, Vine Cutting, Removal, and Selective Stump Grinding

· Remove/ pull ornamental shrubs as specified and grind stumps below grade.

· Cut dead standing trees, invasive shrubs and vines.

· Remove hazardous trees, standing and collapsed.

· Mulch areas of dense invasive shrubs and vines for fire risk reduction.

· Selectively grind stumps below grade as individually specified.

· Mulch in place or chip debris where specified, allowing area to be seeded.

· Grind stumps where specified.

· Option B: Clear vegetation in Nelson-Whittemore area.

D. Field Mowing

· Mow and mulch overgrown fields and field edges.

E. Meadow Establishment

· Apply meadow mix and starter fertilizer to bare soil using a slicer-seeder or seed drill

F. Fence Removal

· Secure pool area during demolition then remove fence after depression is filled to grade level.

· Remove abandoned woven wire pasture fencing and associated posts and hardware.

END OF SECTION 3.0 SCOPE OF WORK

SECTION 4.0 SUBMITTALS

4.1 Submittals: The Contractor shall submit the following information to the CO following the award of the contract. The CO and COR shall review these submittals for conformance to the contract requirements and respond within 7 working days whether the submittal is either accepted or rejected. Any changes to the submittals at any point in the contract shall require a new submittal to the Government for review.

4.2 Letter Designating Project Superintendent: The Contractor shall submit a letter on company letterhead designating the project superintendent, with email and phone contacts.

4.3 Project Schedule: Proposed schedule of operations by location, including hours and days of the week, month, or quarter as appropriate.

4.4 Comprehensive Schedule of Values: Breakdown of each lump-sum item into component work activities for which progress payments may be requested. Work activities broken out within schedule of values shall be integrated into and made a logical part of the construction baseline schedule.

a. Total costs for the component work activities shall equal contract price for that lump-sum item.

b. Contracting Officer may request data to verify accuracy of dollar values.

c. Include mobilization, general condition costs, overhead and profit in the total dollar value of unit price items and in the component work activities for each lump-sum item. Do not include mobilization, general condition costs, overhead or profit as a separate item.

4.5 Safety and Accident Prevention Plan: Prior to Notice to Proceed, the Contractor shall submit to the CO and COR a Safety and Accident Prevention Plan which includes information about safe equipment operations for contract employees and safe operation around Park visitors. Specific topics to address in the safety plan include daily safety briefing with contract team, use of PPE, address and phone of nearest medical facility, potential site hazards, locations to shelter in extreme weather, and emergency contact info for Contractor project manager and field staff. The plan will also include Park staff and Ranger on Duty contact information. A template is provided (Attachment 2).

4.6 List of Subcontractors and Written Statements: The Contractor shall submit a list of subcontractors and written statements within 10 days of contract award and prior to Notice to Proceed. Each subcontractor shall submit on company letterhead a signed letter certifying compliance with applicable standards.

4.7 Insurance Certificates: The Contractor shall submit certificates of insurance or SF1413 for Contractor and all Subcontractors.

4.8 Qualification Data including Licenses: Qualification data shall be provided to the CO and COR for all contract employees who will be working in the Park including names, role, and contact information. Qualification data shall include

a. Certified arborist license(s) that are current

b. Hoisting Engineer license(s) that are current

c. Specialized equipment license(s) that are current

d. Safety training certificates (ANSI Z133 and ANSI A300)

4.9 Waste Management Plan (WMP): The Contractor shall submit a Waste Management Plan (WMP) to ensure that potential and known site materials in Areas 1, 4, 5, 6, and 8 and Option A pool materials to be removed are reused, salvaged, or recycled to minimize waste disposal in landfills. Materials to be included in the WMP are metals, fencing, concrete, rubble, fill, soil, and plastics. And, for Option A: concrete, pool shell rubble, rebar, plastics, motor(s), and piping.

4.10 Grass Seed Certification: From seed vendor for each grass-seed mixture, stating the botanical and common name, percentage by weight of each species and variety, and percentage of purity, germination, and weed seed. Include the year of production and date of packaging.

4.11 Plan for Seed Applications: Prior to seeding, the Contractor shall provide for approval to the CO and COR a map/plan in paper or digital format confirming locations of seed application, type of seed and method of application, and timing of application.

4.12 Product Certificates for Starter Fertilizers: For fertilizers, provide product certificates from manufacturer.

4.13 As-Built for Livestock Gate: For Area 5, Task 5c provide As-Built drawing of new livestock gate, detailed in Section 11.E.8.k.

4.14 Option A: Pre-construction Site Visit Confirmation: For Option A, the park has obtained Determination of (In)Applicability (Jan 30, 2026), meaning that the project does not require a Notification of Intent/Wetlands Protection Act. The Contractor will hold a pre-construction site visit with a representative of the Town of Concord Department of Natural Resources site visit. Submittal is an associated email confirming the date and time of this meeting.

4.15 Option A Demolition Permit and Completion Report: For Option A, the Contractor shall obtain a Demotion Permit from the Town of Concord for the removal of the inground pool on land within Minute Man National Historical Park at 474 Barrett’s Mill Road, Concord. Upon completion of the removal and grading, the Contractor shall provide to the CO and COR a record of Completion Report filing with the Town of Concord.

4.16 The following Submittal template included as Attachment:

a. Attachment 2: Safety and Accident Prevention Plan template

END OF SECTION 4.0 SUBMITTALS

SECTION 5.0 GOVERNMENT FURNISHED PROPERTY AND MATERIALS

5.1 Government Furnished Equipment: There are no Government furnished property or materials associated with this contract.

SECTION 6.0 SECURITY

6.1 Public Safety: Contractor shall take necessary measures to ensure public safety while performing their duties. This includes preventing any member of the public from entering the work site, leaving hazardous materials unsecured or operating motor vehicles on Park roads/trails. CO shall provide direction to the contractor if the need arises to clarify Park safety policies and protocols.

6.2 NPS Employee Access: All buildings must remain open and accessible for Park employees during the length of this contract. Any coordination needed for this effort will be provided by the CO and the COR.

6.3 Vehicle Parking: The Selected Contractor shall not park in access ways that are designated for firefighting equipment or that would impede evacuation from a facility in the event of an emergency.

a. Violation of federal, state, or local law.

b. Disorderly conduct, uses of abusive or offensive language, quarreling, intimidation by words or actions, fighting, or participation in disruptive activities that interfere with the normal efficient operations of the Government.

c. Theft, vandalism, immoral conduct, or any other criminal action.

d. Selling, consuming, or being under the influence of intoxicants, drugs, or substances which produce similar effects while in or on federally controlled property.

e. Violation of Title 18, U.S.C., Section 930, which prohibits the knowing possession or the causing to be present firearms or other dangerous weapons in federal facilities.

SECTION 7.0 PERIOD OF PERFORMANCE, SCHEDULING, AND FEDERAL HOLIDAYS

7.1 Base CLIN: As stated in Requirements Section 1.11 and Submittals 4.3, the Contractor shall submit a proposed schedule of operations. The Contractor, CO, and COR shall meet virtually biweekly to review the schedule, or as needed. The contract shall commence on or about August 22, 2026. The period of performance is 13 months (404 days) ending on September 30, 2027.

7.2 Options: If contract options are awarded the following period of performance shall be followed.

· Option A shall commence on August 22, 2026 and conclude on January 31, 2027.

· Option B shall commence on August 22, 2026 and conclude on September 30, 2027.

7.3. Scheduling: Certain tasks need to be carried out within season to protect natural and cultural resources. See Table 2. See Section 4.3 regarding schedule submittals.

7.4 April Special Events & Federal Holidays: Every year during the month of April, the Park hosts special events memorializing the anniversary of the Battle of Lexington and Concord. The events culminate on or around April 19th, designated as Patriots Day in Massachusetts. As a key location for public visitation during patriotic and memorial holidays, Minute Man National Historical Park, no field rehabilitation services are permitted on Patriots Day in April or Federal holidays. Federal holidays are listed in “Definitions” section.

Table 2. Period of Performance, Scheduling by Task

Aug Sept-Oct Nov-Dec Jan-Feb Mar-Apr May-Jun Jul-Sep

1. Barrett Farm

1b

3b

3c

4b

4c

4d

5b

5c

5d

6b

6c

6d

SECTION 8.0 CONTRACTOR’S USE OF PREMISES

8.5 Utilities: Water and power are available at limited locations. If the contractor has a need for either, contact the CO and COR for information on which locations have water or power available for Contractor use. Project components requiring ground disturbance require that the Contractor contact Digsafe and the CO and COR and not proceed with ground disturbance until the work site is cleared for digging. Above groundwork within overhead utility lines requires certifications listed in Section 4.3, Submittals.

8.6 Use of Dumpsters: Contractor is responsible for disposal of all trash, debris, rubble, and recycling encountered in work areas and shall stage dumpster(s) in designated locations noted on Area maps. Dumpsters shall not be loaded above the rim. The contractor shall not dispose of any waste in National Park Service trash receptacles, dumpsters, or containers.

8.7 Vehicle Parking & Storage: The Contractor shall be granted use of the existing parking at all work sites. The Contractor shall not park or otherwise store vehicles, equipment, or trailers in the Park without the coordination and permission from the CO and COR.

8.7 Use of Public Restrooms: The Contractor is permitted to use public restrooms in the Park during contracted periods. This includes restrooms located at the North Bridge Visitor Center, Monument Street, Meriam’s Corner, Hartwell Parking Area, and the Minute Man Visitor Center. These facilities are typically open during daylight hours from May 1 to November 1. Public restrooms are closed and unavailable during the months of November, December, January, February, March, and early April.

8.8 Securing Equipment, Rented Equipment, and Portable Toilet(s). The Contractor is responsible for securing equipment, rented equipment, and portable toilet(s) in work areas.

8.8 Hazardous Conditions: The Contractor shall report fires, hazardous conditions, sink holes, abandoned wells, and items in need of repair to the Contract Officer.

8.9 Lost & Found: The contractor shall report and turn in lost articles found by the Contractor’s employees to the Contract Officer by way of the Contract Officer Representative.

8.10 Illegal Digging or Metal Detecting: The Contractor shall not approach or confront anyone illegally digging or metal detecting within work areas and will immediately notify the Park Ranger On Duty. Contact information will be provided during contract

8.11 Public Use of Premises

a. The Park trails are open to the public year round, but closures are feasible with advance notice and coordination with Contracting Officer. Closures are not feasible during April commemorative events.

b. Some project sites in the Park are adjacent to residential neighborhoods. Equipment operators and safety monitors will need to maintain awareness of neighbors and members of the public.

c. Contractor will conduct operations to ensure the least inconvenience to the public. Trail closures are permitted, when required upon specific approval of Contracting Officer.

d. Contractor shall ensure that all drop zones and airborne vegetation mulching zones are marked with safety cones and/or caution tape, and monitored. All public walkways shall be blocked including areas where boom equipment may swing between cutting or felling operations and stacking or grinding.

SECTION 9.0 RESTRICTIONS

9.1 Historic Objects: No physical contact with historic artifacts is permitted without the approval of the CO and COR.

9.2 Stone Walls, Stone Piles, Foundation Stones: No alteration of stone walls, stone piles, or foundation stones for access to field rehabilitation areas is permitted without the approval of the CO and COR.

9.3 Audio Devices: No audible listening devices such as radios, Bluetooth speakers, etc. s-hall be permitted while work is conducted, except to communicate between team members.

9.4 Smoking Policy: Ensure that the Contractor’s employees adhere to Park’s ‘No Smoking Policy.’ No smoking is allowed inside or within 50 feet of any Park building, structure, or facility.

9.5 Vegetation: Ensure that the Contractor’s employees do not remove vegetation or agricultural crops that are outside of the Contract Scope of Work such as flowers, willows, mushrooms, berry plants, or farm field crops.

SECTION 10.0 CONTRACT OFFICER & CONTRACT OFFICER’S REPRESENTATIVE

10.1 Contracting Officer

Jason Albright Jason_Albright@ios.doi.gov 617-519-6145

10.2 Contracting Officer’s Representative

Margie Coffin Brown or Peter McPherson Minute Man National Historical Park 174 Liberty Street Concord, MA 01742 margie_coffin_brown@nps.gov, 617-620-2942 peter_mcpherson@nps.gov, 339-201-1971

SECTION 11, SPECIFICATIONS, DIVISIONS A THROUGH F

SECTION 11, DIVISION A: SELECTIVE DEMOLITION, FILL, COMPACTION, GRADING

11.A.1. OVERVIEW

The work of this Division consists of restoring historic field areas. Specific tasks include the removal of piles of agricultural equipment and debris; abandoned livestock fencing; and stockpiled loam, fill, stones, and rubble. Some areas require grading to prepare the area for seeding (seeding is detailed Division E: Meadow Establishment). Selective demolition, fill, compaction, and grading tasks are listed in a table at the end of this Division and shown on Area Maps.

Option A includes the demolition and removal of an inground pool and nearby concrete deck used for basketball in order to restore the historic farm field. The removal of the structures involves capping the electric, natural gas (for heating pool), and water lines near the house; removing the upper three feet of the pool and collapsing and jackhammering/breaking up the remaining sides and bottom in situ. The pulverized remnants are compacted with lifts of clean gravel to fill the cavity. Compacting in one foot lifts will minimize future settling. The stockpiled loam is reapplied to the surface.

11.A.2. DEFINITIONS

a. Finish Grade: Elevation of finished surface of planting soil.

b. Planting Topsoil: Existing, on-site soil suited for plant growth, also referred to as loam. The topsoil in the work area will be stockpiled, then re-spread as part of the final grading to a depth of approximately 4 inches. Removal of topsoil from the Park is not permitted unless in designated piles for removal and upon the approval of the CO and COR.

c. Subgrade: The surface or elevation of subsoil remaining after excavation is complete, or the top surface of a fill or backfill before planting soil is placed.

11.A.3. SUBMITTALS

All submittals required under this division shall be made in accordance with Section 4.0, Submittals.

a. Written Sequence of the Operation and Schedule: A detailed construction schedule for all stockpiling, demolition, dismantling, removal, filling, compaction, and grading work to allow for coordination of inspection. Sequencing shall ensure that the pool is not left in place without protective perimeter fencing. Approval of the plan by the Government does not absolve the Contractor of responsibility for ensuring the safe and effective accomplishment of the work specified.

b. Demolition Quality Assurance Plan: The plan including a list of techniques, methods, and equipment proposed as described in 11.A.4 below.

11.A.4. QUALITY ASSURANCE

a. Quality Assurance Plan Submittal: The Contractor shall submit a Quality Assurance Plan describing the techniques, methods, and equipment proposed to accomplish the requirements. The plan shall include the following items:

· Sequence of the operation (see also 11.A.1 above)

· Safety and Accident Prevention Plan including team, equipment, and safety protocols.

· Excavation, Demolition, and Disposal permits

· Confirmation with meeting with Town of Concord Conservation Commission after installation of silt socks/wattles and prior to ground disturbance at Barrett Farm

· Method of protection of all adjacent surfaces and structures.

· Confirmation of stockpiling location for topsoil at Barrett Farm work area.

· Confirmation of dumpster or dump truck staging area for removals.

· Describe all methods and procedures, tools and equipment proposed for use in narrative form including demolition and methods and list of items to be removed.

· With pre-demolition photographs with captions, show existing conditions of adjoining construction and site improvements. Submit before work begins. See Section 4.0, Submittals.

a. Pre Site Work Notification Conditions: The CO and COR must be notified at least two working days in advance of Division A work.

b. Work Limits: Lawns, driveways, and any other pavement disturbed during this contract will be repaired by the Contractor to match original grades and finishes. Area will be returned to same or better condition.

c. Subsurface Hazards: The park will identify all known subsurface hazards including wells and septic systems, both active and abandoned. If the Contractor or Subcontractors locate additional subsurface hazards, they shall contact the CO and COR immediately and coordinate with them to photograph, mark, and fence the subsurface hazard.

d. Safety: All Contractor and Subcontractors will be included in the Safety and Accident Prevention Plan. The Contractor and Subcontractors shall comply with safety requirements for demolition, ANSI A10.6-90. Provide protection of the work area to ensure the safety of contract team and the public. Provide ladder, life ring and associated lifesaving methods for Contractor team in advance of and during dewatering and subsurface work, particularly inground pool.

e. Permits: Provide all permits required for excavation (Town of Concord, Digsafe), pool removal, wetland protection, and waste disposal.

f. Site Maintenance: The site shall be kept clean of debris, with all equipment and materials stored in an orderly manner.

g. Disposal: Disposal of pool water, pool cover; concrete and rebar; basketball deck and structure; upper 36” of pool walls; perimeter fencing; pool hardware including pumps, filters, ladders, lighting, and associated plumbing, gas line, and electric lines between house and pool; debris; perimeter vegetation within the work area at an approved disposal site is the Contractor’s responsibility and must be in accordance with federal, state, and local regulations, including demolition permit conditions.

h. Regulatory Requirements: Comply with EPA regulations and with hauling and disposal regulations of authorities having jurisdiction. Contractor is responsible for all permits and methods of compliance.

i. Standards: Comply with ANSI/ASSE A10.6 and NFPA 241.

11.A.5. PEFORMANCE REQUIREMENTS

a. Contractor requirements: Contractor shall furnish all materials, staging, equipment and disposal containers necessary to accomplish the demolition of items listed in “11.A.4.g” above and other items specified herein.

b. Erosion and Sedimentation Controls: Protect and maintain erosion and sedimentation controls during earth-moving operations.

c. Bank and Slope Protection: Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials. Exercise care to preserve the material below and beyond the lines of excavation including subgrades during pool puncturing. The area is a National Register Historic District hence ground disturbance should be minimized.

d. Backfill Staging: Where excavation is carried out below indicated grade or beyond the lines of excavation, Contractor shall backfill and compact with staging on firm natural ground. Compact in 12 inch lifts within the 20 x 40 ft depression, where the depth of the pool to be punctured is approx. 11 feet at one end and 3 1/2 feet at the other end. (When the “gunite” pool was constructed in 1986, permit files indicated 80 cu yards were removed for the excavation.)

e. Site Damage: Where the work site has been softened or eroded by flooding, equipment, or placement during unfavorable weather, or other such conditions, it shall be removed and replaced by the Contractor with suitable material at no cost to the Government.

11.A.6. PRODUCTS

a. Sub-base Backfill Material: Once pool is demolished, backfill materials shall consist of the pulverized pool with gaps filled with natural or crushed gravel. Gravel shall be free from debris, asphalt, frozen materials, roots, or other organic material. The naturally or artificially graded mixture of natural or crushed stone, uniformly pre-mixed with a predetermined quantity of water; ASTM D 2940/D 2940M; with 100 percent passing a 3-inch sieve, and at least 70 percent passing a 1 1/2-inch sieve and not more than 10 percent passing a No. 200 sieve. Testing shall be in accordance with AASHTO T 311. Unsuitable materials which are classified as organics such as peat, trash, fill, roots, debris, and topsoil are unacceptable for backfill.

b. Stockpiled Topsoil: Extant topsoil in work area shall be stockpiled in designated location and used for finish grading to a depth of 4 inches or greater and smoothed as needed for seeding (additional topsoil and seeding of this area not included in contract.). Additional topsoil will not be introduced to the site. Removal of topsoil from the Park is not permitted.

c. Protective Materials: The Contractor shall furnish temporary fencing as…