SOW.pdf

Statement of Work

INSTALL A GOVERNMENT

SUPPLIED PRE-ENGINEERED

VAULTED RESTROOM

Great Meadows National Wildlife Refuge

– Concord Unit

Concord, MA

United States Fish and Wildlife Service Refuges Division 300 Westgate Center Dr.

Hadley, MA 01035

Statement of Work

Install Pre‐Engineered Vaulted Restroom Building at the

Great Meadows NWR – Concord Unit

TABLE OF CONTENTS

SECTION DESCRIPTION

01000 General Requirements

02201 Soil Erosion and Sedimentation Control

02202 Earth Moving

02480 Landscape Work

02510 Hot‐Mix Asphalt Paving

15000 Pre‐Engineered Vaulted Restroom Building

APPENDIX

Site Plan

Preliminary Building Plan

SECTION 01000 – GENERAL

SCOPE OF WORK

A. Install a Government supplied pre‐engineered building kit (Romtec Model 1077 ‐ SST

Aspen Compact Double ‐ Waterless Restroom or approved equal with 1000‐gallon vault tanks). In addition, provide all materials and labor for the site work, and installation of a new concrete foundation with sealed concrete slab, painting and staining, construction of one fully accessible van parking space with painted access aisle, and accessible signage, bollard installation, and underground electrical connection to existing underground or possible aboveground transformer. The local utility company will make the final connection.

1.01 LOCATION AND INSPECTION OF THE SITE

A. Site visit will be scheduled within the posting of Solicitation.

B. Directions to the Concord Unit: Travel to this area by following Route 62 east from

Concord Center toward Bedford. After approximately one mile, turn left onto Monsen

Road. Continue to 179 Monsen Road where you will see the refuge entrance on your left.

C. All inquiries concerning the contract documents shall be made to: Contracting and General

Services, U.S. Fish and Wildlife Service, Christine Beauregard, Contracting Officer. email:

christine_beauregard@fws.gov and direct through MS Teams.

1.03 REFUGE OPERATIONS

A. Great Meadows NWR, Concord Unit will continue operations during the performance of the contract.

B. The Government will close access to visitors’ vehicles to the Concord Unit at the street.

Access will be reopened after the new pavement has had sufficient time to harden.

C. The Contractor shall exercise care and shall schedule his work so as not to interfere with

Refuge operations. When it becomes necessary to interrupt any function of the Refuge, the Contractor shall notify the Manager at least 48 hours in advance and shall not proceed on such interruptions until such time as the Manager makes provisions for and approves such operations.

1.04 TEMPORARY FACILITIES AND CONTROLS

A. The Contractor shall furnish, erect and maintain all temporary construction facilities and controls and perform all temporary work as required to complete the finished work in accordance with the contract documents.

B. Temporary facilities shall be defined as include construction trailers, storage trailers, sanitary toilets, waste containers, staging, rigging, portable generators, required safety measures and any such facility required to complete or support the completion of the work but not to be incorporated as a part of the completed project.

C. Electricity, and water are available on‐site at the Comfort Station shown on the Title

Sheet. Contractors may utilize if no modifications are required. The Contractor shall make those investigations necessary to determine the availability of and existing conditions regarding utilities at the site. An on‐site porta potty is located approximately

350’ away to the northwest of the site. The Comfort Station is currently closed.

D. Drinking water and telephone shall be furnished by the Contractor at the Contractor’s expense.

E. The Contractor shall provide adequate on‐site containers for the collection of waste materials, debris and rubbish. Debris and rubbish shall be placed in containers daily.

F. Waste materials shall be disposed of in accordance with all Federal, State and local regulations.

G. All temporary services and facilities shall be removed at the Contractors expense prior to work being considered complete.

1.05 WORK SCHEDULE

A. The Contractor shall confine their operations to the regular hours of the Refuge unless they have the prior approval of the Refuge Manager. No work will be allowed on

Saturdays, Sundays, or legal Holidays.

1.06 CLEANUP

A. The Contractor shall restore or replace any property or plantings damaged by his work, equipment, or employees. Upon completion of the project, all debris and Contractor equipment shall be removed from the site.

1.07 SUBMITTALS

A. Submit for Government approval information concerning the quality of all products, materials, and equipment to be used on this project. Submittal will include enough information for the Government to determine if the materials meet the specified quality requirements. Submittal forms shall be furnished to the Contractor and shall be used when submitting all submittals.

B. Provide exterior, interior wall, doors, frames, and roof finish options for Contracting Officer Representative review and approval. Color sample submittals shall be sent to the

Refuge, and the Contracting Officer Representative for selection.

C. Each submittal item plus a completed Material Approval Submittal form shall be submitted directly to the Contracting Officer’s Representative (COR) for review. Up to twelve (12) items or groups of items may be submitted on each submittal form. These submittals shall be mailed to the COR. This form shall be mailed to U.S. Fish and Wildlife

Service, 300 Westgate Center Drive, Hadley, MA 01035‐9589.

1. A Microsoft Word electronic copy of the Material Approval Submittal form will be provided to the Contractor for their use.

2. The Contractor shall e‐mail the completed form in .doc format for each submittal back to the COR.

3. Electronic submittals are permitted and encouraged.

Required Submittals List:

No. Description of Item Submitted

1. Project Schedule – start and estimated completion dates

2. Schedule of values

3. Landfill and Recycling Facility Records

4. Safety Plan as described below

5. Concrete Mix and grout

6. Sheet type steel wire fabric and rebar

7. Concrete curing materials

8. Galvanized pipe bollards

9. Primer, paint, and color samples

10. Sediment Control Plan

11. Hot‐mix asphalt paving mixes.

12. Pavement marking paint.

13. Traffic signs.

14. Soil materials, and riprap

15. Geotextile

16. Electrical components, conduit, and magnetic warning tape

1.08 SAFETY REQUIREMENTS

A. The Contractor is solely responsible for the safety and protection of all persons and property at the project site. The Contractor shall strictly comply with all provisions of the

Code of Federal Regulations (CFR) 29 CFR 1910 Occupational Safety and Health Standards

(OSHA), and 29 CFR 1926 Safety and Health Regulations for Construction.

B. A type written Safety Plan shall be submitted consisting of a few paragraphs describing the anticipated hazards to the workers, USFWS employees, and the general public associated with this type of work and the proposed steps taken to eliminate the hazards.

The contractor shall submit a signed and dated Safety Plan for review and acceptance by the Contracting Officer or their representative before beginning work. Hiring a consultant to write the safety plan is not required for this project. Acceptance of the contractor’s safety plan does not relieve the contractor of the responsibility to comply with all contract requirements, applicable laws, and regulations.

END OF SECTION

SECTION 02201 ‐ SOIL EROSION AND SEDIMENTATION CONTROL

PART 1 ‐ GENERAL

1.01 SCOPE

A. Construction operations shall be carried out in such a manner that soil erosion, air, and water pollution shall be minimized. Federal, state, and local laws shall be followed. In accomplishing the required work, the Contractor shall adhere to the following guidelines.

1. Erosion and sedimentation control measures shall be in accordance with the

Massachusetts Erosion and Sediment Control Guidelines for Urban and Suburban

Areas.

2. There shall be no stockpiling of excavated materials within areas subject to erosion.

3. When vegetation is disturbed or exposed by the Contractor's operations in a manner which could subject the soil to erosion, straw bales or sediment retaining fabrics shall be immediately installed to prevent possible soil erosion. These sediment control structures shall be maintained until vegetation is re‐established at the site by the Contractor. Erosion and sedimentation controls shall be removed after grass has been established to prevent future erosion.

SECTION 02202 ‐ EARTH MOVING

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

B. Massachusetts Highway Department Standard Specifications for Highways and Bridges, including all Supplemental Specifications (MHD SS). Measurement and Payment provisions of the MHD SS do not apply to this project.

1.02 SUMMARY

A. Section Includes:

1. Excavating and filling for rough grading the Site.

2. Preparing subgrades for slabs‐on‐grade, walks, pavements, turf, and grasses.

3. Excavating and backfilling for buildings and structures.

4. Drainage course for concrete slabs‐on‐grade.

5. Subbase course for concrete walks.

6. Subbase course and base course for asphalt paving.

7. Drainage fill for foundation drainage.

8. Excavating and backfilling trenches for utilities and pits for buried utility structures.

9. Dewatering.

1.03 DEFINITIONS

A. Backfill: Soil material used to fill an excavation.

1. Trench Backfill: Backfill placed over bedding material to fill a trench.

B. Base Course: Aggregate layer placed between the subbase course and hot‐mix asphalt paving.

C. Bedding Material: Aggregate layer placed over the excavated subgrade in a trench before laying pipe and backfill placed beside and over pipe in a trench, including haunches to support sides of pipe.

D. Borrow Soil: Satisfactory soil imported from off‐site for use as fill or backfill.

E. Drainage Course: Aggregate layer supporting the slab‐on‐grade that also minimizes upward capillary flow of pore water.

F. Drainage Fill: Material placed around subsurface drainage piping to promote drainage of groundwater.

G. Excavation: Removal of material encountered above subgrade elevations and to lines and dimensions indicated.

1. Authorized Additional Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions as directed by Contracting Officer. Authorized additional excavation and replacement material will be paid for according to Contract provisions for Changes in the Work.

2. Bulk Excavation: Excavation more than 10 feet in width and more than 30 feet in length.

3. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions without direction by Contracting Officer. Unauthorized excavation, as well as remedial work directed by Contracting Officer, shall be without additional compensation.

H. Fill: Soil materials used to raise existing grades.

I. Rock: Rock material in beds, ledges, unstratified masses, conglomerate deposits, and boulders of rock material that exceed 1 cu. yd. that cannot be removed by rock‐excavating equipment equivalent to the following in size and performance ratings, without systematic drilling, ram hammering, ripping, or blasting, when permitted:

1. Equipment for Footing, Trench, and Pit Excavation: Late‐model, track‐mounted hydraulic excavator; equipped with a 42‐inch‐maximum‐width, short‐tip‐radius rock bucket; rated at not less than 138‐hp flywheel power with bucket‐curling force of not less than 28,700 lbf and stick‐crowd force of not less than 18,400 lbf with extra‐long reach boom.

2. Equipment for Bulk Excavation: Late‐model, track‐mounted loader; rated at not less than 230‐hp flywheel power and developing a minimum of 47,992‐lbf breakout force with a general‐purpose bare bucket.

J. Select Materials: Subbase material, base course material, bedding materials, structural fill, drainage course, drainage fill, and crushed stone.

K. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man‐made stationary features constructed above or below the ground surface.

L. Subbase Course: Aggregate layer placed between the subgrade and base course for hot‐ mix asphalt pavement, or aggregate layer placed between the subgrade and a cement concrete pavement or a cement concrete walk.

M. Subgrade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subsequent soil materials or other work.

N. Utilities: On‐site underground pipes, conduits, ducts, and cables as well as underground services within buildings.

1.04 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct pre‐excavation conference at Project site.

1. Review methods and procedures related to earthmoving, including, but not limited to, the following:

a. Coordination with on‐going Government operations.

b. Personnel and equipment needed to make progress and avoid delays.

c. Coordination of Work with utility locator service and utility service providers.

d. Coordination of Work and equipment movement with the locations of tree‐ protection zones, public areas, and other hatchery facilities.

e. Field quality control.

1.05 ACTION SUBMITTALS

A. Submittals shall comply with the requirements of Section 01000 “Submittal Procedures” and the individual sections specifying the work.

B. Product Data: For each type of the following manufactured products required:

1. Geotextiles.

2. Warning tapes.

C. Material Test Reports: For each on‐site and borrow native or natural soil material proposed for fill and backfill as follows:

1. Classification according to ASTM D2487.

2. Laboratory compaction curve according to ASTM D1557.

D. Material Test Reports: For each select material proposed for subbase, base, bedding, structural fill, drainage course, drainage fill, and crushed stone, riprap as follows:

1. Laboratory Gradation Analysis according to ASTM C117 and ASTM C136.

2. Laboratory compaction curve according to ASTM D1557.

1.06 INFORMATIONAL SUBMITTALS

A. Submittals shall comply with the requirements of Section 01000 “Submittal Procedures” and the individual sections specifying the work.

B. Qualification Data: For qualified testing agency.

1.07 QUALITY ASSURANCE

A. Geotechnical Testing Agency Qualifications: Qualified according to ASTM E329 and

ASTM D3740 for testing indicated.

1.08 FIELD CONDITIONS

A. Traffic: Minimize interference with adjoining roads, parking areas, walks, and other adjacent occupied or used facilities during earth‐moving operations.

1. Do not close or obstruct streets, access drives, parking areas, walks, or other adjacent occupied or used facilities without permission from Contracting Officer.

2. Provide alternate routes around closed or obstructed traffic ways if required by Contracting Officer.

B. Utility Locator Service: Notify the Massachusetts "Dig Safe System" before beginning earth‐moving operations.

C. Do not commence earth‐moving operations until temporary site fencing and erosion‐ and sedimentation‐control measures are in place.

D. The following practices are prohibited within tree protection zones:

1. Storage of construction materials, debris, or excavated material.

2. Parking vehicles or equipment.

3. Erection of sheds or structures.

4. Excavation or other digging unless otherwise indicated.

PART 2 – PRODUCTS

2.01 SOIL MATERIALS

A. General: Provide borrow soil materials when sufficient satisfactory soil materials are not available from excavations.

B. Satisfactory Soils: Soil Classification Groups GW, GP, GM, SW, SP, and SM according to

ASTM D2487, or a combination of these groups; free of rock or gravel larger than 3 inches in any dimension, debris, waste, frozen materials, vegetation, and other deleterious matter.

C. Unsatisfactory Soils: Soil Classification Groups GC, SC, CL, ML, OL, CH, MH, OH, and PT according to ASTM D2487, or a combination of these groups.

1. Unsatisfactory soils also include satisfactory soils not maintained within 2 percent of optimum moisture content at time of compaction.

D. Base Course: Artificially graded mixture of crushed gravel, crushed stone, and natural or crushed sand free from vegetable matter, lumps, or balls of clay and other deleterious substances, and conforming to MHD SS Section M2.01.7.

E. Subbase Course: Inert material that is hard, durable stone and coarse sand, free from loam, clay, surface coatings and deleterious materials and conform to MHD SS Section

M1.03.1.

F. Bedding Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2321, Class IB or II; except with 100 percent passing a 1‐inch sieve and not more than 8 percent passing a No. 200 sieve.

G. Drainage Course: Narrowly graded mixture of washed crushed stone or crushed or uncrushed gravel; ASTM D 448; coarse‐aggregate grading Size 57; with 100 percent passing a 1‐1/2‐inch sieve and 0 to 5 percent passing a No. 8 sieve.

H. Drainage Fill: Same material as drainage course.

I Riprap: Stone for riprap shall consist of sound, durable rock which will not disintegrate by exposure to water or weather. Field stone, rough quarry stone or blasted ledge rock may be used. The median stone size shall be as indicated. Maximum stone size shall be 1.5 times the median size. Include enough smaller stones to fill the voids in the larger stones.

J. Impervious Fill: Native fine‐grained soil at a moisture content suitable for compacting to a dense state.

K. Structural Fill: Well‐graded sand and gravel mixture free of roots, topsoil, loam, organic material, and any other deleterious materials, as well as clods of silt or clay, and meet the following graduation requirements:

Screen or Sieve Size Percent Passing

3 inches 100

No. 4 40‐75

No. 40 10‐50

No. 200 0‐10

L. Sand: ASTM C33/C33M; fine aggregate.

2.02 GEOTEXTILE FABRIC

A. Subsurface Drainage Geotextile: Nonwoven needle‐punched geotextile, manufactured for subsurface drainage applications, made from polyolefins or polyesters; with elongation greater than 50 percent; complying with AASHTO M 288 and the following, measured per test methods referenced:

1. Survivability: Class 2; AASHTO M 288.

2. Grab Tensile Strength: 150 lbf; ASTM D 4632.

3. Grab Elongation: 50%; ASTM D 4632.

4. Tear Strength: 60 lbf; ASTM D 4533.

5. Puncture Strength: 95 lbf; ASTM D 4833.

6. Apparent Opening Size: No. 70 sieve, maximum; ASTM D 4751.

7. Permeability: 0.24 centimeters per second, minimum; ASTM D 4491.

2.03 ACCESSORIES

A. Detectable Warning Tape: Acid‐ and alkali‐resistant, polyethylene film warning tape manufactured for marking and identifying underground utilities, a minimum of 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector when tape is buried up to 30 inches deep; colored as follows:

1. Red: Electric.

2. Yellow: Gas, oil, steam, and dangerous materials.

3. Orange: Telephone and other communications.

4. Blue: Water systems.

5. Green: Sewer systems.

PART 3 ‐ EXECUTION

3.01 PREPARATION

A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth‐moving operations.

B. Protect and maintain erosion and sedimentation controls during earth‐moving operations.

C. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

3.02 DEWATERING

A. Provide dewatering system of sufficient scope, size, and capacity to control hydrostatic pressures and to lower, control, remove, and dispose of ground water and permit excavation and construction to proceed on dry, stable subgrades.

B. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

C. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

1. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

D. Dispose of water removed by dewatering in a manner that avoids endangering public health, property, and portions of work under construction or completed. Dispose of water and sediment in accordance with local, State and Federal requirements.

3.03 EXPLOSIVES

A. Explosives: Do not use explosives.

3.04 EXCAVATION, GENERAL

A. Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include rock, soil materials, and obstructions. No changes in the Contract Sum or the

Contract Time will be authorized for rock excavation or removal of obstructions.

1. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials.

3.05 EXCAVATION FOR STRUCTURES

A. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch. If applicable, extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections.

1. Excavations for Footings and Foundations: Do not disturb bottom of excavation.

Excavate by hand to final grade just before placing concrete reinforcement. Trim bottoms to required lines and grades to leave solid base to receive other work.

2. Excavation for Underground Tanks, Basins, and Mechanical or Electrical Utility Structures: Excavate to elevations and dimensions indicated within a tolerance of plus or minus 1 inch. Do not disturb bottom of excavations intended as bearing surfaces.

3.06 EXCAVATION FOR WALKS AND PAVEMENTS

A. Excavate surfaces under walks and pavements to indicated lines, cross sections, elevations, and subgrades.

3.07 EXCAVATION FOR UTILITY TRENCHES

A. Excavate trenches to uniform widths to provide the following clearance on each side of pipe or conduit. Excavate trench walls vertically from trench bottom to 12 inches higher than top of pipe or conduit unless otherwise indicated.

B. Trench Bottoms: Excavate trenches 6 inches deeper than bottom of pipe and conduit elevations to allow for a minimum of 6” of sand bedding on all sides of pipe, and conduit.

3.08 SUBGRADE INSPECTION

A. Notify Contracting Officer when excavations have reached required subgrade.

B. If Contracting Officer determines that unsatisfactory soil is present, continue excavation and replace with compacted backfill or fill material as directed.

C. Proof‐roll subgrade below the building slabs with several passes of a large vibratory plate compactor or small vibratory roller to identify soft pockets and areas of excess yielding.

Do not proof‐roll wet or saturated subgrades.

1. Completely proof‐roll subgrade in two perpendicular directions.

2. Excavate soft spots, unsatisfactory soils, and areas of excessive pumping or rutting, as determined by Contracting Officer, and replace with compacted backfill or fill as directed.

D. Authorized additional excavation and replacement material will be paid for according to

Contract provisions for changes in the Work.

E. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Contracting Officer, without additional compensation.

3.09 UNAUTHORIZED EXCAVATION

A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation of concrete foundation or footing to excavation bottom, without altering top elevation. Lean concrete fill, with 28‐day compressive strength of 2500 psi, may be used when approved by Contracting Officer.

1. Fill unauthorized excavations under other construction, pipe, or conduit as directed by Contracting Officer.

3.10 STORAGE OF SOIL MATERIALS

A. Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust.

1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees.

3.11 BACKFILL

A. Place and compact backfill in excavations promptly, but not before completing the following:

1. Construction below finish grade including, where applicable, subdrainage, damp proofing, waterproofing, and perimeter insulation.

2. Surveying locations of underground utilities for Record Documents.

3. Testing and inspecting underground utilities.

4. Removing concrete formwork.

5. Removing trash and debris.

6. Removing temporary shoring, bracing, and sheeting.

B. Place backfill on subgrades free of mud, frost, snow, or ice.

3.12 UTILITY TRENCH BACKFILL

A. Place backfill on subgrades free of mud, frost, snow, or ice.

B. Place and compact bedding course on trench bottoms and where indicated. Shape bedding course to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits.

C. Backfill voids with satisfactory soil while removing shoring and bracing.

D. Initial Backfill:

1. Place and compact initial backfill of bedding material to a height of 6 inches over the pipe or conduit.

a. Carefully compact bedding material under pipe haunches and compact evenly up on both sides and along the full length of piping or conduit to avoid damage or displacement of piping or conduit. Coordinate backfilling with utilities testing.

E. Final Backfill:

1 Place and compact final backfill of satisfactory soil to final subgrade elevation, unless indicated otherwise.

F. Warning Tape: Install detectable warning tape directly above utilities, 12 inches below finished grade, except 6 inches below subgrade under pavements and slabs.

3.13 SOIL FILL

A. Plow, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material.

B. Place and compact fill material in layers to required elevations as follows:

1. Under grass and planted areas, use satisfactory soil material.

2. Under walks and pavements, use satisfactory soil material.

3. Under building slabs, use structural fill.

4. Under footings and foundations, use structural fill.

C. Place soil fill on subgrades free of mud, frost, snow, or ice.

3.14 SOIL MOISTURE CONTROL

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

3.15 COMPACTION OF SOIL BACKFILLS AND FILLS

A. Place backfill and fill soil materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment and not more than 4 inches in loose depth for material compacted by hand‐operated tampers.

B. Place backfill and fill soil materials evenly on all sides of structures to required elevations and uniformly along the full length of each structure.

C. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D1557:

1. Under structures, building slabs, steps, and pavements compact of existing subgrade and each layer of backfill or fill soil material at 95 percent.

2. Under walkways, compact existing subgrade, and each layer of backfill or fill soil material at 95 percent.

3. Under turf or unpaved areas, compact existing subgrade, and each layer of backfill or fill soil material at 90 percent.

4. For utility trenches within 2 feet of the surface, compact each layer of backfill soil material at 95 percent.

a. For utility trenches more than 2 feet below the surface, compact each layer of backflow soil material at 92 percent.

3.16 GRADING

A. General: Uniformly grade areas to a smooth surface, free of irregular surface changes.

Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

1. Provide a smooth transition between adjacent existing grades and new grades.

2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

B. Site Rough Grading: Slope grades to direct water away from buildings and to prevent ponding. Finish subgrades to elevations required to achieve indicated finish elevations, within the following subgrade tolerances:

1. Turf or Unpaved Areas: Plus, or minus 1 inch.

2. Walks: Plus, or minus 1 inch.

3. Pavements: Plus, or minus 1/2 inch.

C. Grading inside Building Lines: Finish subgrade to a tolerance of 1/2 inch when tested with a 10‐foot straightedge.

3.17 SUBBASE AND BASE COURSES UNDER PAVEMENTS AND WALKS

A. Place subbase course and base course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place subbase course and base course under pavements and walks as follows:

1. Place base course material over subbase course under hot‐mix asphalt pavement.

2. Shape subbase course and base course to required crown elevations and cross‐slope grades.

3. Place subbase course and base course 6 inches or less in compacted thickness in a single layer.

4. Place subbase course and base course that exceeds 6 inches in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches thick or less than 3 inches thick.

5. Compact subbase course and base course at optimum moisture content to required grades, lines, cross sections, and thickness to not less than 95 percent of maximum dry unit weight according to ASTM D1557.

C. Pavement Shoulders: Place shoulders along edges of subbase course and base course to prevent lateral movement. Construct shoulders, at least 12 inches wide, of satisfactory soil materials and compact simultaneously with each subbase and base layer to not less than 92 percent of maximum dry unit weight according to ASTM D1557.

3.18 DRAINAGE COURSE UNDER CONCRETE SLABS‐ON‐GRADE

A. Place drainage course on subgrades free of mud, frost, snow, or ice.

B. On prepared subgrade, place and compact drainage course under cast‐in‐place concrete slabs‐on‐grade as follows:

1. Place drainage course 6 inches or less in compacted thickness in a single layer.

2. Compact drainage course to required cross sections and thicknesses to not less than

95 percent of maximum dry unit weight according to ASTM D1557.

3.19 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified geotechnical engineering testing agency to perform tests and inspections.

B. Allow testing agency to inspect and test subgrades and each fill or backfill layer. Proceed with subsequent earth moving only after test results for previously completed work comply with requirements.

C. Footing Subgrade: At footing subgrades, at least one test of each soil stratum will be performed to verify design bearing capacities. Subsequent verification and approval of other footing subgrades may be based on a visual comparison of subgrade with tested subgrade when approved by Contracting Officer.

D. Testing agency will test compaction of soils in place according to ASTM D1556, ASTM D2167, ASTM D2937, and ASTM D6938, as applicable. Tests will be performed at the following locations and frequencies:

1. Paved and Building Slab Areas: At subgrade and at each compacted fill and backfill layer, at least one test for every 2000 sq. ft. or less of paved area or building slab but in no case fewer than three tests.

2. Foundation Wall Backfill: At each compacted backfill layer, at least one test for every 100 feet or less of wall length but no fewer than two tests.

3. Trench Backfill: At each compacted initial and final backfill layer, at least one test for every 150 feet or less of trench length but no fewer than two tests.

E. When testing agency reports that subgrades, fills, or backfills have not achieved degree of compaction specified, scarify, and moisten or aerate, or remove and replace soil materials to depth required; recompact and retest until specified compaction is obtained.

3.20 PROTECTION

A. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion.

Keep free of trash and debris.

B. Repair and reestablish grades to specified tolerances were completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

1. Scarify or remove and replace soil material to depth as directed by Contracting Officer;

reshape and recompact.

C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

1. Restore appearance, quality, and condition of finished surfacing to match adjacent work, and eliminate evidence of restoration to greatest extent possible.

3.21 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. Remove satisfactory soil more than designated quantity, waste materials, including unsatisfactory soil, trash, and debris, and legally dispose of them off Government's property.

SECTION 02480 – LANDSCAPE WORK

PART 1 – GENERAL

1.01 DESCRIPTION OF WORK

A. Topsoil, seed, fertilize, and mulch all disturbed areas.

PART 2 ‐ PRODUCTS

2.01 LAWN AREAS

A. Topsoil shall be fertile, natural soil, typical of the locality, free of stones, subsoil, debris, roots, sticks, clay, peat, noxious weeds, brush, sod, or other litter, and obtained from naturally well drained area.

B. Lawn seed

1. Quality: State‐certified seed of grass species as listed below for solar exposure.

2. Quality: Seed of grass species as listed below for solar exposure, with not less than 85 percent germination, not less than 95 percent pure seed, and not more than 0.5 percent weed seed:

3. Sun and Partial Shade: Proportioned by weight as follows:

a. 50 percent Kentucky bluegrass (Poa pratensis).

b. 30 percent chewings red fescue (Festuca rubra variety).

c. 10 percent perennial ryegrass (Lolium perenne).

d. 10 percent redtop (Agrostis alba).

4. Shade, Cool Season Grass: Proportioned by weight as follows:

a. 50 percent chewings red fescue (Festuca rubra variety).

b. 35 percent bluegrass (Poa trivialis).

c. 15 percent redtop (Agrostis alba).

C. Mulching material shall be oat, hay, or wheat straw free from weeds, foreign matter detrimental to plant life, and dry.

D. Slow‐Release Fertilizer shall be commercial grade; recommended for grass; of proportion necessary to eliminate deficiencies of topsoil consisting of Granular or pelleted fertilizer consisting of 50 percent water insoluble nitrogen, phosphorus, and potassium.

E. Lime shall be ASTM C602, agricultural limestone containing a minimum 80 percent calcium carbonate equivalent.

PART 3 ‐ EXECUTION

A. Areas disturbed by construction operations, and were not paved, or in areas of riprap shall be spread with minimum 4” of topsoil, fertilized, seeded at the rate of 100 lbs. per acre, and mulched with a continuous straw blanket at the rate of two (2) bales per 1000 square feet of area.

B. Planting Season: Seeding may occur once the ground is permanently thawed and when weather and soil conditions are suitable for planting the materials in accordance with locally acceptable practice.

A. Grass Seeding: Spring seeding shall occur between mid‐April and mid‐June. Fall seeding shall occur between mid‐August and October 1, however, seeding for soil erosion control must occur at the time of disturbance. Planting season may be extended with written permission of the Contracting Officer.

SECTION 02510 ‐ HOT‐MIX ASPHALT PAVING

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

B. Massachusetts Highway Department Standard Specifications for Highways and Bridges, including all Supplemental Specifications (MHD SS). Measurement and Payment provisions of the MHD SS do not apply to this project.

1.02 SUMMARY

A. This Section includes the following:

1. Hot‐mix asphalt paving.

2. Pavement marking paint.

3. Traffic signs.

1.03 SYSTEM DESCRIPTION

A. Design Requirements: Provide Superpave Hot Mix Asphalt Pavement (SHMA) conforming to the Massachusetts Highway Department Standard Specifications for Highways and

Bridges including all Supplemental Specifications (MHD SS), except as modified herein.

1.04 ACTION SUBMITTALS

A. Submittals shall comply with the requirements of Section 01000 “Submittals” and the individual sections specifying the work.

B. Product Data: For the following, including technical data and tested physical and performance properties:

1. Design mixes.

2. Pavement marking paint.

3. Traffic signs and signposts.

C. Utilize a Massachusetts Highway Department approved Hot Mix Asphalt Pavement Job

Mix Formula (JMF). The job mix formula for each mixture shall establish the percentage of dry weight of aggregate passing each required sieve size and an optimum percentage of asphalt binder based upon the weight of the total mix.

D. Field quality control reports.

1.05 INFORMATIONAL SUBMITTALS

A. Submittals shall comply with the requirements of Section 01000 “Submittals” and the individual sections specifying the work.

B. Qualification Data: For firms and persons specified in the "Quality Assurance" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names, and addresses of architects and owners, and other information specified.

1.06 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced installer who has completed hot‐mix asphalt paving similar in material, design, and extent to that indicated for this Project and with a record of successful in‐service performance.

B. Manufacturer Qualifications: Engage a firm experienced in manufacturing hot‐mix asphalt similar to that indicated for this Project and with a record of successful in‐service performance.

Firm shall be a registered and approved paving mix manufacturer with the Massachusetts

Highway Department.

C. Regulatory Requirements: Conform to applicable standards of Massachusetts Highway

Department for asphalt paving work on public property.

1.07 DELIVERY, STORAGE, AND HANDLING

A. Deliver pavement‐marking materials to Project site in original packages with seals unbroken and bearing manufacturer's labels containing brand name and type of material, date of manufacture, and directions for storage.

B. Store pavement‐marking materials in a clean, dry, protected location within temperature range required by manufacturer. Protect stored materials from direct sunlight.

1.08 PROJECT CONDITIONS

A. Environmental Limitations: Do not apply asphalt materials if substrate is wet or excessively damp or if the following conditions are not met:

1. Tack Coats: Minimum surface temperature of 60 deg F.

2. Asphalt Concrete Pavement: Limitations in accordance with MHD SS.

B. Pavement‐Marking Paint: Proceed with pavement marking only on clean, dry surfaces and at a minimum ambient or surface temperature of 40 deg F for oil‐based materials, 50 deg

F for water‐based materials, and not exceeding 95 deg F.

PART 2 ‐ PRODUCTS

2.01 AGGREGATES

A. General: Use materials and gradations that have performed satisfactorily in previous installations.

B. Coarse and Fine Aggregate: MHD SS Supplemental Specifications Section M3.11.2.

C. Mineral Filler: MHD SS Supplemental Specifications Section M3.11.2.

2.02 ASPHALT MATERIALS

A. Performance Graded Asphalt Binder: (PGAB). PG 64‐28 in accordance with MHD SS. The

PGAB shall meet the applicable requirements of AASHTO Standard M 320, Standard

Specifications for PGAB.

B. Prime Coat: MC 30 or MC 70 cut‐back asphalt in accordance with AASHTO M82.

C. Tack Coat: ASTM D 977, emulsified asphalt, or ASTM D 2397, cationic emulsified asphalt, slow setting, diluted in water, of suitable grade and consistency for application.

D. Water: Potable.

2.03 AUXILIARY MATERIALS

A. Sand: MHD SS Supplemental Specifications Section M3.11.2.

B. Pavement‐Marking Paint: Latex, waterborne emulsion, lead, and chromate free, ready mixed, complying with FS TT‐P‐1952, with drying time of less than 45 minutes.

Color: White striping and chevron painting. The international symbol of accessibility shall have a white symbol and border on a blue background.

2.04 MIXES

A. Asphalt‐Aggregate Mixture (Binder and Wearing Courses): The Design Mix shall be

“Superpave” based on estimated traffic 0.3 to less than 10 million 80 kN ESALS in conformance with Supplemental Specification Section 450, except as modified herein, for the following grades:

1. Binder Course: 12.5 mm superpave.

2. Wearing Course: 9.5 mm superpave.

2.05 TRAFFIC SIGNS

A. Traffic signs shall conform to MHD SS Section 828, for aluminum traffic signs and the

Manual on Uniform Traffic Control Devices (MUTCD).

B. The accessible parking signs shall be mounted to a galvanized metal u‐channel post, driven into the ground. A van accessible parking space sign, MUTCD sign R7‐8a (12”x6”) shall be mounted 7’ above finished grade using two, 3/8” stainless steel bolts, nuts, and washers. A standard accessible parking space sign, MUTCD sign R7‐8 (12”x18”) shall be mounted above using similar bolts.

PART 3 ‐ EXECUTION

3.01 EXAMINATION

A. Verify that subgrade is dry and in suitable condition to support paving and imposed loads.

B. Proof‐roll base course using heavy, pneumatic‐tired rollers to locate areas that are unstable or that require further compaction.

C. Notify Contracting Officer in writing of any unsatisfactory conditions. Do not begin paving installation until these conditions have been satisfactorily corrected.

3.02 SURFACE PREPARATION

A. General: Immediately before placing asphalt materials, remove loose and deleterious material from substrate surfaces. Ensure that prepared subgrade is ready to receive paving.

Sweep loose granular particles from surface of existing asphalt concrete paving and unbound‐aggregate base course. Do not dislodge or disturb aggregate embedded in compacted surface of base course.

B. Sawcut existing pavement with a clean vertical edge. Apply tack coat and match existing grade when the compaction is complete.

C. Tack Coat: Apply uniformly to existing surfaces of previously constructed asphalt or

Portland cement concrete paving and to surfaces abutting or projecting into new, hot‐mix asphalt pavement. Apply at a uniform rate of 0.05 to 0.15 gal./sq. yd. of surface.

1. Allow tack coat to cure undisturbed before paving.

2. Avoid smearing or staining adjoining surfaces, appurtenances, and surroundings.

Remove spillages and clean affected surfaces.

3.03 TRANSPORTATION AND DELIVERY OF MIXTURES

A. Comply with MHD SS requirements.

3.04 HOT‐MIX ASPHALT PLACING

A. Machine place hot‐mix asphalt mix on prepared surface, spread uniformly, and strike off.

Place asphalt mix by hand to areas inaccessible to equipment in a manner that prevents segregation of mix. Place each course to required grade, cross section, and thickness, when compacted. Placement and finishing shall conform to MHD SS unless indicated otherwise.

1. Place hot‐mix asphalt in number of lifts and thicknesses indicated in Section 3.07 of this specification.

2. Begin applying mix along centerline of crown for crowned sections and on high side of one‐way slopes, unless otherwise indicated.

3. Regulate paver machine speed to obtain smooth, continuous surface free of pulls and tears in asphalt‐paving mat.

B. Place paving in consecutive strips not less than 8 feet wide, except where infill edge strips of a lesser width are required.

After first strip has been placed and rolled, place succeeding strips and extend rolling to overlap previous strips. Complete asphalt binder course for a section before placing asphalt surface course.

C. Promptly correct surface irregularities in paving course behind paver. Use suitable hand tools to remove excess material forming high spots. Fill depressions with hot‐mix asphalt to prevent segregation of mix; use suitable hand tools to smooth surface.

3.05 JOINTS

A. Construct joints to ensure continuous bond between adjoining paving sections. Construct joints free of depressions with same texture and smoothness as other sections of hot‐mix asphalt course.

1. Clean contact surfaces and apply tack coat.

2. Offset longitudinal joints in successive courses a minimum of 6 inches. Longitudinal joint in wearing course shall be on centerline of roadway.

3. Offset transverse joints in successive courses a minimum of 24 inches.

4. Construct transverse joints by bulkhead method or sawed vertical face method as described in AI's "The Asphalt Handbook."

5. Compact joints as soon as hot‐mix asphalt will bear roller weight without excessive displacement.

6. Compact asphalt at joints to a density within 2 percent of specified course density.

3.06 COMPACTION

A. General: MHD SS, and as follows: Begin compaction as soon as placed hot‐mix paving will bear roller weight without excessive displacement. Compact hot‐mix paving with hot, hand tampers or vibratory‐plate compactors in areas inaccessible to rollers.

Complete compaction before mix temperature cools to 185 deg F.

B. Breakdown Rolling: Accomplish breakdown or initial rolling immediately after rolling joints and outside edge. Examine surface immediately after breakdown rolling for indicated crown, grade, and smoothness. Repair surfaces by loosening displaced material, filling with hot‐mix asphalt, and rerolling to required elevations.

C. Intermediate Rolling: Begin intermediate rolling immediately after breakdown rolling, while hot‐mix asphalt is still hot enough to achieve specified density. Continue rolling until hot‐mix asphalt course has been uniformly compacted to the required density.

D. Finish Rolling: Finish roll paved surfaces to remove roller marks while hot‐mix asphalt is still warm.

E. Edge Shaping: While surface is being compacted and finished, trim edges of pavement to proper alignment. Bevel edges while still hot, with back of rake or smooth iron. Compact thoroughly using tamper or other satisfactory method.

F. Repairs: Remove paved areas that are defective or contaminated with foreign materials.

Remove paving course over area affected and replace with fresh, hot‐mix asphalt.

Compact by rolling to specified density and surface smoothness.

G. Protection: After final rolling, do not permit vehicular traffic on pavement until it has cooled and hardened.

H. Erect barricades to protect paving from traffic until mixture has cooled enough not to become marked.

I. The number and weight of rollers shall be sufficient to compact the mixture to a minimum density of 92% of the theoretical density of the specific mix while it is still in a workable condition.

3.07 INSTALLATION TOLERANCES

A. Thickness: Compact each course to produce the thickness indicated within the following pavement thickness and tolerances after compaction:

1. Binder Course: 2” plus or minus 1/4 inch.

2. Wearing Course: 1.25” plus 1/4 inch, no minus.

B. Surface Smoothness: Compact each course to produce a surface smoothness within the following tolerances as determined by using a 10‐foot straightedge applied transversely or longitudinally to paved areas:

1. Binder Course: 1/4 inch.

2. Wearing Course: 1/8 inch.

3.08 PAVEMENT MARKING

A. Do not apply pavement‐marking paint until layout, colors, and placement have been verified with the Contracting Officer.

B. Allow paving to cure for a minimum of 30 days before starting pavement marking.

C. Sweep and clean surface to eliminate loose material and dust.

D. Apply paint with mechanical equipment to produce pavement markings of dimensions indicated, with uniform, straight edges. Apply in accordance with manufacturer's written instructions and at manufacturer's recommended rates to provide a minimum wet film thickness of 15 mils.

3.09 SIGN INSTALLATION

A. Traffic signs shall be installed in conformance with MHD SS and the MUTCD.

3.10 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to perform tests and inspections.

B. Thickness: In‐place compacted thickness of hot‐mix asphalt courses will be determined according to ASTM D 3549.

C. Surface Smoothness: Finished surface of each hot‐mix asphalt course will be tested for compliance with smoothness tolerances.

D. In‐Place Density: Testing agency take compaction test of the compacted pavement according to ASTM D 979 or AASHTO T 168.

Field density of in‐place compacted pavement may also be determined by nuclear method according to ASTM D 2950 and correlated with ASTM D 1188 or ASTM D 2726.

E. Replace and compact hot‐mix asphalt where core tests were taken.

F. Remove and replace hot‐mix asphalt where test results or measurements indicate that it does not comply with specified requirements.

3.11 DISPOSAL

A. Remove excavated pavement materials from Project site and legally dispose of them in an

EPA approved landfill or a hot mix asphalt concrete pavement manufacturing plant for plant recycling.

Do not allow excavated materials to accumulate on‐site.

SECTION 15000 ‐ PRE‐ENGINEERED VAULTED RESTROOM BUILDING

PART 1: GENERAL

1.01 SUMMARY

A. The work shall include furnishing the sealed architectural, structural, mechanical, and electrical plan sets as well as the structural, mechanical, and electrical building components as a complete, pre‐designed packaged restroom building as shown on drawings and as specified herein.

B. This specification section is intended to show the Government supplied materials that

Romtec, Inc will be supplying (building supplier). Work to be done and additional materials to be supplied by the Contractor, hereafter designated as the building installer.

1.02 OVERVIEW

A. Packaged restroom building and all associated design and engineering, with all listed components supplied by Romtec, Inc., hereafter designated as the building supplier.