Addendum 2 - BID 2027-02 Tennis Courts.pdf

BID 2027-02

Tennis Courts

ADDENDUM NO. 2

The attention of vendors submitting proposals for the above subject project is called to the following addendum. The number of the Addendum (2) must be entered on the “Bid Form”.

Response to Questions issued as Addendum No. 2

Attached please find Earthwork Specifications to be included in BID 2027-02 Tennis Courts.

~ End Addendum No. 2 ~

EARTHWORK

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SECTION 02200

PART I - GENERAL

1.01 GENERAL PROVISIONS

A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of this Section of the Specifications.

1.02 DESCRIPTION OF WORK

A. Work Included: Provide labor, materials and equipment necessary to complete the work of this Section, including but not limited to the following:

1. Stripping of all existing topsoil within the limit of work.

2. Complete removal of all subsoil encountered within 2 feet of finished grade within the proposed locations of tennis courts.

3. Excavating for the site improvements.

4. Filling, grading and subgrade preparation.

5. On-site management of all excavated materials.

6. Furnishing, placement and compaction of all fill materials specified herein or shown on the Drawings.

7. Protecting stockpiles of excavated fill material and natural soils intended for on-site reuse against increases in moisture content, and freezing temperatures.

8. Frost protection.

9. Rock excavation as may be required to attain the specified grades.

10. Off-site disposal of all unsuitable and excess excavated materials, including any chemical analysis that may be required for disposal.

11. Storm water control.

12. Rough grading.

13. Dust control.

B. Special Conditions For Site Preparation and Earthwork Operation: The Contractor shall adhere to normal haul times allowed by the local authorities having jurisdiction.

1.03 EXAMINATION OF SITE AND DOCUMENTS

A. It is hereby understood that the Contractor has carefully examined the site and all conditions affecting work under this Section. No claim for additional costs will be allowed because of lack of

02200 - 2 full knowledge of existing conditions as indicated in the Contract Documents, or obvious from observation at the Site.

B. Plans, surveys, measurements, and dimensions under which the work is to be performed are believed to be correct, but the Contractor shall have examined them for himself during the bidding period, as no allowance will be made for any errors or inaccuracies that may be found except as otherwise provided herein.

1.04 STANDARDS AND DEFINITIONS

A. Massachusetts Department of Transportation Standard Specifications for Highways and Bridges (MDOT Specifications).

B. American Society for Testing and Materials (ASTM)

C. American Association of State Highway and Transportation Officials (AASHTO).

D. Occupational Safety and Health Administration (OSHA).

E. MCP: Massachusetts Contingency Plan, 310 CMR 40.0000

F. Massachusetts Solid Waste Management Facility Regulations 310 CMR 19.00.

G. Massachusetts Site Assignment Regulations for Solid Waste Facility Regulations 310 CMR

16.000.

H. Unsuitable Soil: Soils which, due to their consolidation properties, degree of saturation, gradation, or other deleterious characteristics will not provide a stable subgrade, or cannot be used as backfill, or do not conform to the requirements of these specifications, shall be considered unsuitable. The Owner’s representative shall be the sole and final judge as to the suitability of soils at the site.

I. Trench Excavation: Excavations of any length where the width is less than twice the depth and where the shortest distance between payment lines does not exceed ten (10') feet.

J. Open Excavation: All excavations not conforming to the definition of Trench Excavation shall be defined as Open Excavation.

K. Rock Excavation: For payment purposes shall be defined naturally-occurring, intact material that cannot be broken and removed by a CAT 235 or equivalent excavator and requires use of hoe rams, systematic drilling and blasting or other mechanical means to fracture and remove.

Boulders over three cubic yards in volume located within soil in open excavation or one cubic yard in volume within soil in trenches, requiring the use of hoe rams, drills, or explosives for removal are also defined as rock excavation.

L. Invert or Invert Elevation: The elevation at the inside bottom surface of the pipe or channel.

M. Bottom of pipe: The base of the pipe at its outer surface.

1.05 EXAMINATION OF SITE AND DOCUMENTS

A. The Contractor shall fully inform himself of existing conditions at the site before submitting his bid, and shall be responsible for carrying out all site work required to fully and properly execute the work of the Contract, regardless of the conditions encountered in the actual work. No claim for extra compensation or extension of time will be allowed on account of actual conditions

02200 - 3 inconsistent with those assumed, except those conditions described in the GENERAL

CONDITIONS.

B. Plans, surveys, measurements and dimensions under which the work is to be performed are believed to be correct to the best of the Owner’s representative's knowledge, but the Contractor shall have examined them for himself during the bidding period and formed his own conclusions as to the full requirements of the work involved.

1.06 SUBSURFACE CONDITIONS

A. By submitting a bid, the Contractor affirms that he has carefully examined the site and all conditions affecting work under this Section. No claim for additional costs will be allowed because of lack of full knowledge of existing conditions.

B. The Contractor may, at his own expense, conduct additional subsurface testing as required for his own information after approval by the Owner.

1.07 SUBMITTALS

A. Issue submittals in accordance with Division 1. Submittals under this Section shall include the following:

1. Proposed schedule, sequence, and procedures for all earthwork operations. Proposed earthwork sequencing and procedures shall include detailed descriptions of all methods, operations and equipment proposed for soil excavation, subgrade preparation, and backfilling.

2. Details of compaction equipment, including descriptions, product literature, specifications and ratings, proposed for use in compacting fill and backfill materials.

3. Plan for control of surface water runoff during site work.

4. Plan for control of dust during site work.

1.08 SAMPLES AND TESTING

A. Fill materials shall be subject to quality control testing. The Soils Engineer will be employed by the Owner to perform tests on materials. Test results and laboratory recommendations will be available to the Contractor.

B. A 50 lb. sample of each off-site material proposed for use, and of any on-site, shall be submitted to the Owner’s representative or Soils Engineer for review and testing at least ten (10) days prior to first use on-site.

1. Samples shall be delivered to office of the Soils Engineer, as directed.

2. The Contractor shall provide the location and name of material source, including on-site sources.

3. The Contractor shall indicate the proposed on-site use of each material submitted.

4. Product Data: Submit location of pits for all borrow material and source site usage.

C. The Owner’s representative will be the sole and final judge of suitability of all materials.

02200 - 4

D. The Soils Engineer will determine maximum dry density and optimum water content in accordance with ASTM D1557, Method C, and in-place density in accordance with ASTM D1556 or ASTM D2167.

E. Tests of materials as delivered may be made from time to time. Materials in question may not be used, pending test results. Remove rejected materials and replace with new, whether in stockpiles or in place.

F. All off-site material submitted for use on the project site shall be subject to chemical testing to determine its conformance with existing environmental regulations. If directed by the Owner or Soils Engineer (due to the nature of the material), the Contractor shall conduct testing on proposed fill material and submit results prior to delivery to the site, at no additional cost to the Owner. Testing shall be conducted by a DEP-certified testing laboratory and shall include one or more of the following analytical test data depending on the source location and use:

1. Total Petroleum Hydrocarbons (EPA Method 418.1) every 100 yards.

2. Volatile Petroleum Hydrocarbons (DEP VPH/VOA Method) every 500 yards.

3. Extractable Petroleum Hydrocarbons (DEP EPH/PAH Method) every 500 yards.

4. PCB and Pesticides (EPA Method 8080) every 500 yards.

5. Total RCRA Metals (EPA Method 6000-7000 series) every 500 yards.

6. TCLP for those total parameters, which exceed twenty (20), times the TCLP criteria every

500 yards.

G. Off-site materials determined to be subject to specialized disposal in conformance with current environmental criteria shall not be utilized on the project site.

H. It is anticipated that chemical testing would not be required for commercial, natural bank-run borrow source, or materials provided through the crushing and processing of pure rock from a quarry.

1.09 COORDINATION

A. The work of this Section shall be coordinated with that of other trades affecting, or affected by, this work, as necessary to assure the steady progress of all work of the Contract.

B. Prior to the start of earthwork, the Contractor shall arrange an on-site meeting with the Owner’s representative, Civil Engineer and Soils Engineer for the purpose of establishing Contractor's schedule of operations and scheduling inspection procedures and requirements.

C. As construction proceeds, the Contractor shall be responsible for notifying the Owner’s representative prior to start of earthwork operations requiring inspection and/or testing.

1.10 SPECIAL SITE CONSIDERATIONS

A. It is the responsibility of the Contractor under this Contract to do the excavation, filling, grading and rough grading to bring the existing grades to subgrade and parallel to finished grades as specified herein and as shown on the Drawings for this Work. The Contractor shall visit the site prior to submitting a bid to become familiar with the extent of the work to be done under this Contract. The Contractor shall be responsible for determining the quantities of earth materials necessary to complete the work under this Section. All earth materials shall be included in the Contractor's base bid.

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1.11 PERMITS, CODES AND SAFETY REQUIREMENTS

A. All work shall conform to the Drawings and Specifications and shall comply with applicable codes and regulations.

B. Comply with the rules, regulations, laws and ordinances of the Local authorities having jurisdiction, appropriate agencies of the Commonwealth of Massachusetts and all other authorities having jurisdiction. Coordinate all work done within City and State rights of way with the appropriate agencies. Provide all required traffic control and safety measures, including uniformed police officers per City and State requirements. All labor, materials, equipment and services necessary to make the work comply with such requirements shall be provided without additional cost to the Owner.

C. Comply with the provisions of the Manual of Accident Prevention in Construction of the

Associated General Contractors of America, Inc., the Commonwealth of Massachusetts Rules and Regulations For the Prevention of Accidents in Construction Operations, and the requirements of the Occupational Safety and Health Administration (OSHA), United States Department of Labor.

D. The Contractor shall procure and pay for all permits and licenses required for the complete work specified herein and shown on the Drawings.

E. The Contractor shall not close or obstruct any street, sidewalk, or passageway unless authorized in writing by the Owner’s representative. The Contractor shall so conduct his operations as to interfere as little as possible with the use ordinarily made of roads, driveways, sidewalks or other facilities near enough to the work to be affected hereby. The Contractor shall comply with the time limits established by the terms for trucking onto and off of the site.

F. Any apparent conflict between the Drawings and Specifications and the applicable codes and regulations shall be referred to the Owner’s representative in writing, for resolution before the work is started.

1.12 LAYOUTS AND GRADES

A. The Contractor shall maintain and/or reestablish benchmarks and survey monuments shown on the Drawings or found to exist on the site to provide a base reference for the construction.

Replace any which may become destroyed or disturbed. The Contractor shall employ and pay all costs for a registered Civil Engineer or Land Surveyor who is licensed within the jurisdiction of the project site to lay out all lines and grades in accordance with the Drawings and Specifications, and as necessary or required for the construction. The selection of the Civil Engineer or Land Surveyor shall be subject to the Owner Representative's approval.

B. The words "finished grades" as used herein shall mean final grade elevations indicated on the

Drawings. Spot elevations shall govern over proposed contours. Where not otherwise indicated, project site areas outside of the building shall be given uniform slopes between points for which finished grades are indicated or between such points and existing grades.

C. The word "subgrade" as used herein, means the required surface of subsoil, natural glacial till, fill material or compacted ordinary fill prior to placement of the engineered sports surface, pavement or concrete walkways. This surface is immediately beneath the site improvements, specially dimensioned fill, paving, loaming or other surfacing material, as dimensioned on the Drawings.

1.13 DISPOSITION OF EXISTING UTILITIES

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A. Active utilities existing on the site and work areas shall be carefully protected from damage and relocated or removed as required by the work. When an active utility line is exposed during construction, its location and elevation shall be plotted on the record drawings as described in this Section and both Owner’s representative and Utility Owner notified in writing.

B. Inactive or abandoned utilities encountered during construction shall be removed if within the area of site improvement or grouted, plugged or capped. The location of such utilities shall be noted on the record drawings and reported in writing to the Owner’s representative.

C. The Contractor shall notify "Dig Safe" and local utility companies prior to the start of construction.

The "Dig Safe" number shall be submitted by the Contractor in writing to the Owner’s representative prior to construction.

D. In case of any damage or injury caused in the performance of the work, the Contractor shall at his own expense make good such damage or injury to the satisfaction of, and without cost to the Owner. Existing streets, sidewalks and curbs damaged during the project work shall be repaired or replaced to their condition prior to commencement of earthwork operations, at no additional cost to the Owner.

1.14 TEMPORARY DRAINAGE AND DEWATERING

A. The Contractor shall control the grading in areas under construction on the site so that the surface of the ground will properly slope to prevent accumulation of water in excavated areas and adjacent properties.

B. Should surface, rain or ground water be encountered during the operations, the Contractor shall furnish and operate pumps or other equipment, and provide all necessary piping to keep all excavations clear of water at all times and shall be responsible for any damage to work or adjacent properties for such water. All piping exposed above surface for this use, shall be properly covered to allow foot traffic and vehicles to pass without obstruction.

C. Presence of ground water in soil will not constitute a condition for which an increase in the contract price may be made. Under no circumstances place concrete fill, soil fill, lay piping or install appurtenances in excavation containing free standing water. Keep utility trenches free of water until pipe joint material has hardened and new utility backfilled to prevent flotation.

D. It is anticipated that minimal dewatering will be necessary to remove ponded surface water and can be accomplished using on-site sumps and pumps.

E. If discharge is necessary, the Contractor shall discharge all pumped water away from the work area, and in accordance with all applicable local codes and laws. Requirements specified herein for Erosion and Siltation Control shall be met during this process.

F. All fill material shall be placed and compacted in-the-dry. The Contractor shall dewater excavated areas as required to perform the work and in such a manner as to preserve the undisturbed state of the natural inorganic or other subgrade soils.

G. For further information refer to paragraphs on SPECIAL REQUIREMENTS FOR SEQUENCE OF

CONSTRUCTION OPERATIONS AND DRAINAGE AND EROSION CONTROL as specified herein.

1.15 FROST PROTECTION

A. Do not excavate to full indicated depth when freezing temperatures may be expected, unless work can be completed to subgrade or piping can be installed and backfilled the same day.

Protect the excavation from frost if placing of concrete or piping is delayed.

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B. The Contractor, at no additional cost to the Owner, shall keep the operations under this Contract clear and free of accumulation of snow within the limits of Contract Lines as required to carry out the work.

C. No work shall be installed on frozen ground.

D. Should protection fail, remove frozen materials and replace with suitable fill material as directed and approved by the Owner’s representative at no cost to the Owner.

1.16 DISTURBANCE OF EXCAVATED AND FILLED AREAS DURING CONSTRUCTION

A. The Contractor shall take the necessary steps to avoid disturbance of underlying fill material, natural subsoil, natural glacial till and compacted ordinary fill during excavation and filling operations. Methods of excavation and filling operations shall be revised as necessary to avoid disturbance of the subgrade and underlying natural soils/compacted fill, including restricting the use of certain types of construction equipment and their movement over sensitive or unstable materials. The Contractor shall coordinate with the Owner’s representative and Soils Engineer to modify his operations as necessary to minimize disturbance and protect bearing soils.

1.17 PROTECTION OF BEARING SUBGRADES

A. The Contractor shall be required to maintain stable, dewatered, and frost fee subgrades for pavement areas, utility trenches, and other areas as directed by the Owner’s representative or Soils Engineer.

B. The Contractor shall take precautions to reduce subgrade disturbance. Such precautions may include diverting storm water runoff away from prepared subgrades, reducing traffic in sensitive areas, thermal protection during cold weather periods, and subgrade stabilization such as placement of filter fabric and crushed stone or compacted gravel fill.

C. Soils exhibiting weaving/instability or which become frozen, as determined by the Soils Engineer, shall be over-excavated (removed) to competent bearing material and replaced with compacted gravel fill or lean concrete at no additional cost to the Owner.

1.18 SPECIAL REQUIREMENTS FOR SEQUENCE OF CONSTRUCTION OPERATIONS AND

DRAINAGE AND EROSION CONTROL

A. An initial procedure for sequencing of construction operations is specified under Section 02100, SITE PREPARATION. This procedure shall be extended through Earthwork operations as follows:

1. Perform initial procedures as specified under Section 02100, SITE PREPARATION.

2. Repair any broken or damaged sections of haybales or siltation fencing installed during site preparation and install any additional sections necessary for proper erosion control.

3. Throughout earthwork operations, in addition to drainage swales, check dams, siltation sumps, and other items shown on the Drawings, the Contractor shall take other necessary precautions, including installation of temporary drainage swales, siltation sumps, check dams, haybales, silt fencing and temporary pipe to direct and control drainage from disturbed areas on the site so that erosion and siltation is minimal. In addition, no erosion or discharge of silt or larger particles shall occur in water bodies or wetland areas to remain undisturbed or onto adjacent properties.

02200 - 8

4. Damaged or loose straw wattles and siltation fence shall be replaced as necessary to maintain their function of controlled erosion and siltation. Damaged or broken down check dams and filtration dams shall be replaced immediately.

5. Throughout construction, remove any accumulation of silt or soil build-up behind hay bales, silt fences, check dams and filtration dams as it occurs. Remove accumulations of silt and soil build-up from the siltation sumps and silt traps when it is approximately 18 inches deep.

6. Replace the gravel layer on the inside of all siltation sumps as necessary to permit adequate flow through the gravel and to maintain their function as a filter of silt and larger particles.

Excavate silt and other material from the basins of all siltation sumps as it accumulates.

7. Remove temporary drainage swales, check dams, siltation sumps, haybales and other temporary drainage, erosion and siltation control measures when permanent drainage control measures have been installed, and grass is established in drainage areas leading to the siltation sumps. Do not remove the above items without approval of the Owner’s representative. If, in the Owner’s representative's opinion, these measures are still necessary, they shall stay in place.

1.19 MEASUREMENT AND PAYMENT

A. Payment for removal of all material as shown on the Contract Drawings or as specified herein, shall be included in the contract price on an unclassified basis. This includes management and on-site reuse of existing topsoil to the fullest extent possible, chemical analysis and off-site disposal of excess topsoil if it has been determined by the Owner’s representative that a surplus of topsoil exists at the site, excavation for all materials necessary to construct the athletic fields, drainage lines and parking area as well as all site grading and improvements outside of the general excavation indicated on the drawings and specified herein.

B. The Contractor shall include in his lump sum all costs associated with excavating all existing topsoil and subsoil to a minimum of 2 feet below finished grade for the athletic fields, paved parking areas, walkways and roadways, as indicated on the Drawings or specified herein.

C. If any part of the excavation is carried through error beyond the depth directed by the Owner’s representative and the dimensions indicated on the Drawings, or called for in the Specifications, the Contractor, at his own expense, shall furnish and install compacted fill material, as directed by the Owner’s representative up to the required level and/or dimensions.

D. Excavation, removal, and/or disposal of unsuitable materials below the grades called for on the

Drawings and as specified herein shall be paid for after removal of such materials has been authorized by the Owner’s representative. The quantities of excavation, removal, disposal and backfilling involving an adjustment of the Contract Price shall be subject to measurement verification and approval by the Owner’s representative, prior to the removal of such materials.

PART 2 – PRODUCTS

2.01 GENERAL

A. Fill material shall be obtained from required on-site cut to the extent suitable material is available and off-site to the extent suitable material is not available from on-site cuts.

B. Fill materials shall conform to the following material descriptions. Gradation requirements shall be determined by ASTM D422 unless otherwise specified.

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C. Uses of Fill Materials: Fill materials listed below shall be utilized as follows and as otherwise indicated on the Drawings, specified or directed.

1. Gravel Fill:

a. For a 4-inch thick base course beneath the root zone mix in conjunction with the 2-inch diameter underdrain pipe.

b. Elsewhere as shown on the Drawings or specified herein.

2. Aggregate Base Course:

a. Base for all walkways, stone dust pavement, and pipe cover as required by the drawings.

b. Raise-in-grade, fill, or backfill beneath structures and/or pavement.

c. Elsewhere as shown on the Drawings or specified herein.

3. ¾ inch Crushed Stone:

a. Base for field event improvements.

b. Pipe bedding and as fill around perimeter/infiltrator drains.

c. Free Draining sub-base for infilled synthetic turf field.

d. Elsewhere as shown on the Drawings or specified herein.

4. Crushed Stone Aggregate Screenings (CAS):

a. For use as Stone Dust where shown on the Drawings.

5. Common Fill

a. For general site backfilling to raise existing grades in lawn and landscaped areas.

b. As backfill at depths in excess of 2 feet below finished grade of paved surfaces.

c. For backfilling, as required, below specified sub-grade materials for athletic fields.

2.02 MATERIALS

A. Geotextile Fabric:

1. Non-woven polypropylene geotextile which is chemically and biologically inert and shall be equivalent to the following:

a. Mirafi 140N, Mirafi Inc., 706-693-2226; www.mirafi.com.

b. Poly Filter-X, Carthage Mills, 800-543-4430; www.carthagemills.com.

2. Woven polypropylene geotextile which is chemically and biologically inert and shall be equivalent to the following:

a. Mirafi 600X, Mirafi Inc., 706-693-2226; www.mirafi.com.

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B. Aggregate:

1. GRAVEL FILL, also referred to as crushed bank run gravel, shall consist of inert material that is hard, durable stone and coarse sand, free from loam and clay, surface coatings, and deleterious materials. Maximum size of stone in gravel shall be two inches (2") largest dimension. Gradation shall conform to MDPW Specification Designation, M1.03.0, Type C, and the following:

Sieve Designation

% Passing by Weight

Minimum Maximum

2 in. 100 1/4 in. 50 85 No. 4 40 75 No. 50 8 28 No. 200 0 10

2. ¾ inch CRUSHED STONE shall consist of inert angular material derived from a stone quarry that is hard, durable, washed stone, free of deleterious materials. Gradation shall conform to the following:

% Passing by Weight

Minimum Maximum

1 in. 100 3/4 in. 90 100 1/2 in. 30 60 3/8 in. 25 45 No. 4 No.10

3. AGGREGATE BASE COURSE, SANDY GRAVEL BASE, or DENSE-GRADED CRUSHED

STONE shall consist of a combination of crusher-run coarse aggregates of crushed stone and fine aggregates of natural sand or stone screenings. Coarse aggregate shall consist of a hard, durable particles of fragments of stone. Fine aggregate shall consist of natural or crushed sand. The composite material shall be free from loam and clay, and deleterious materials. Gradation shall conform to MDPW Specification Designation, M2.01.7, and the following:

% Passing by Weight

Minimum Maximum

2 in. 100 1 ½ in. 70 100 3/4 in. 50 85 No. 4 30 55 No. 50 8 24 No. 200 3 10

4. COMMON or ORDINARY FILL shall be retained from on-site sources and shall consist of mineral soil, free of organic materials, loam, trash, wood, trash, snow, ice, frozen soil, plastic

02200 - 11 clay and other compressible or deleterious materials. It shall have physical properties such that it may be readily spread and compacted for the formation of compacted fills without excessive weaving or instability, as judged by the Soils Engineer. It shall be free of highly plastic clays, of all materials subject to decay, decomposition or dissolution, and of cinders or other materials which will corrode piping or other metal.

a. Fill material, subsoil and glacial till from excavation on the site shall be used as Ordinary

Fill. The contractor shall take precautions to maintain suitability of excavated on-site fill, subsoil and glacial till for re-use, particularly in regard to moisture maintenance and prevention of freezing.

b. The Contractor shall bear all costs associated with the off-site disposal of soils that have become unsuitable after excavation and stockpiling of these soils due to the Contractor’s failure to protect the stockpiled soils from moisture and/or freezing.

Note: The maximum particle size shall be 3 inches for backfill placed within 2 feet of utilities and 6 inches elsewhere.

5. SAND BEDDING shall consist of clean, inert, hard, durable grains of quartz or other hard, durable rock, free from loam or clay, surface coatings and deleterious materials, and shall conform to the following gradation requirements:

% Passing by Weight

Minimum Maximum

1/4 in. 100 No. 200 0 10

C. CRUSHED AGGREGATE SCREENINGS (CAS):

1. Crushed Aggregate Screenings or Stone Dust shall conform to the following analysis: Color to be determined by the Owner’s representative.

% Passing by Weight

3/8 in.

Minimum

Maximum

#4 #100

No. 30 0 40 No. 60 0 15 No. 100 0 8 No. 200 0 2

D. UNSUITABLE MATERIAL

1. Material containing organic matter, frozen materials, debris, materials subject to decomposition, silts and silty materials which are too wet to be stabilized and existing fill which, in the opinion of the Soils Engineer, do not satisfy the design requirements, shall be unsuitable material.

2. Suitable Soil that is allowed to become frozen, saturated, or unstable because of the

Contractor’s failure to employ appropriate dewatering, excavation methods, or weather protection is considered unsuitable material.

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3. Unsuitable material shall be legally disposed off-site by the Contractor at no additional cost to the Owner.

2.03 EQUIPMENT

A. Provide sufficient equipment units of suitable types to spread, level, and compact fills promptly upon delivery of materials.

B. Contractor may use any compaction equipment or device which he finds convenient or economical, but the Owner’s representative retains the right to disapprove equipment which, in his opinion, is of inadequate capacity or unsuited to the character of material being compacted.

PART 3 – EXECUTION

3.01 GENERAL REQUIREMENTS

A. Stripping: Prior to starting general excavation, all existing topsoil within the Limit of Work as shown on the Contract Drawings shall be stripped to its full depth, screened and stockpiled in approved locations for later on-site reuse. All stockpiled topsoil shall be screened under the work of this Section and as specified in Section Lawns. All stockpiled topsoil shall be tested for suitability as loam as specified in Sections Planting Soils. If topsoil does not meet the specifications for loam, it may be reused as ordinary fill, beneath lawn and planting areas only, if it meets the requirements as specified, or removed from the site and disposed of in a legal manner. Stockpiled topsoil for re-use as loam shall be free from trash, brush, stones over three-quarter inch (3/4") in diameter and other extraneous matter. All excess loam quantities shall be removed from the site at no additional cost to the Owner after Owner’s representative is satisfied that there is enough existing screened and acceptable material stockpiled on site to complete the project. The Contractor shall perform all chemical analysis that may be required for off-site disposal of the excess topsoil, at no additional cost to the Owner. Do not strip without a clear understanding of existing soil, planting and site conditions to be preserved. Contractor shall supply additional quantities of loam if there is not enough on-site material to complete the work at no additional cost to the Owner.

B. All topsoil containing excessive amounts of stones or organics shall be stockpiled separately and removed from the site at no additional cost to the Owner.

C. The Contractor shall perform all work necessary to strip, store, stockpile, transport, clean and re-spread existing topsoil, and to furnish any additional topsoil required to complete the work.

3.02 EXCAVATION

A. Excavate all materials, on an unclassified basis, encountered to allow construction of the proposed athletic fields, site improvements, utilities and site work as shown on the Drawings and as specified herein.

B. Excavate to levels shown for site improvements, as required to provide working clearance and to allow adequate inspection.

C. All excavation shall be performed in the dry. Excavation and dewatering shall be accomplished by methods which preserve the undisturbed state of subgrade soils.

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D. Excess excavated material shall be reused on site to the fullest extent possible. No off-site removal of soil will be permitted unless directed by the Owner’s representative.

E. In planting areas, remove boulders and other obstructions to a depth of at least two feet below finished grade.

F. When excavations have reached the prescribed depths, the Owner’s representative shall be notified and will make an inspection of the conditions. After inspection, the Contractor will receive approval to proceed if conditions meet design requirements.

G. Should an excavation be carried beyond the depth indicated on the drawings or as specified herein as a result of Contractor's error, the Contractor shall provide and place compacted ordinary fill, as directed by the Owner’s representative, to the required elevation at no additional cost to the Owner.

H. Localized sumps and temporary ditches shall be made as needed to drain off surface water and groundwater to avoid damage to areas of cut or fill. Such ditches shall be maintained as required for efficient operation, at no additional cost to the Owner. Water shall be recharged on-site.

I. Prior to placing subbase and base course materials required beneath the athletic fields and for support of pavements and concrete walkways, specifically in areas in which building demolition was recently performed including removal of the below grade remains of former structures utilities and foundations, proof compact subgrades consisting of existing fill material with a minimum of 5 passes of a vibratory roller exerting a minimum of 20,000 foot-pounds of energy to the soil and weighing a minimum of 5-tons. Specific attention should be paid to those areas of the site in which former structures that were recently demolished and removed. Any soft or spongy areas revealed by the proof-compacting process shall be removed and replaced with compacted Ordinary Fill as directed by the Owner’s representative, at no additional cost to the Owner.

3.03 TRENCH EXCAVATION

A. Excavate as necessary for all drainage pipes, utilities and related structures and appurtenances, and for any other trenching necessary to complete the work.

B. In general, machine excavation of trenches will be permitted with the exception of preparation of pipe beds which will be hand work. Excavate by hand or machine methods at least six inches below the bottom of all utilities.

C. Trench excavation shall include the removal of all materials encountered. During excavation, materials determined to be suitable for backfilling shall be piled in an orderly manner a sufficient distance from the banks of the trench to avoid overloading and to prevent slides or cave-ins. All excavated materials not required or unsuitable for backfill shall be reused on site. The banks of trenches shall be cut as near vertical as practicable to the extent allowed by OSHA.

D. The Contractor shall provide, at his own expense, suitable bridges over trenches where required for accommodation and safety of the traveling public and as necessary to satisfy the required permits and codes.

E. Trenches shall be excavated to the necessary width and depth for proper laying of pipe or other utility and shall have vertical sides or slopes as required by codes. Minimum width of trenches shall provide clearance between the sides of the trench and the outside face of the utility.

Maximum trench sizes are as shown on the Drawings or as specified herein. The depth of the trench shall be six inches below the bottom of the pipe barrel or respective utility.

F. Coordinate all utility and trench backfilling with the trades involved.

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3.04 FILLING AND GRADING

A. Placing Fills:

1. Provide all specified fill materials.

2. Areas to be filled shall be natural undisturbed soil or existing fill material that has been proof compacted as specified herein, and shall be free of construction debris, refuse, compressible or decayable materials and standing water. Do not place fill when subgrade or layers below it are unsuitable.

3. Notify the Owner’s representative when excavations are ready for inspection. Filling shall not be started until conditions have been approved by the Owner’s representative.

4. Furnish approved materials. Place fill in layers not exceeding 6 inches compacted thickness and compact as specified below for various fill conditions.

5. All fill is to be placed "in the dry", to which end dewatering may be required. Spreading and drying of each layer may also be required. The Contractor shall dewater excavated areas as required to perform the work and in such a manner as to preserve the undisturbed state of the existing subgrade.

6. Within lawns and planting areas:

a. All fills shall be compacted to between 88 and 90 percent of its maximum modified dry

Proctor density.

7. In the case of lawn and planting areas, compaction requirements for subgrades and fills shall be considered minimums and maximums within the density percentages called for, and any overcompaction of subgrades or fills which would be detrimental to lawn or planting objectives shall be corrected by loosening subgrades or fills through tilling or other means and recompacting to specified compaction limits.

8. The Contractor shall notify the Owner’s representative three (3) days in advance when the rough grades are established and ready for formal inspection.

B. Backfilling of Trenches and Structures:

1. Areas to be backfilled shall be free of construction debris, refuse, compressible or decayable materials and standing water. Do not place fill when fill materials or layers below it are frozen unless specifically approved by the Soils Engineer.

2. Gravel shall be used as Backfill around manholes and other structures. Excavated material may be used if approved by the Owner’s representative or Soils Engineer.

3. Do not commence backfilling operations of utility trenches until all piping, conduits, etc. have been installed, tested and approved and the locations of all pipe and appurtenances have been recorded. Backfill carefully by hand around pipe to depth of one foot above top of pipe using material specified herein, and tamping firmly in layers not exceeding six inch layers, compacting by hand rammers or mechanical tampers. When a manufacturer of utility line materials suggests backfill materials and methods other than those specified herein, such requirements shall govern providing the finished work equals or exceeds the result obtained by the materials and methods specified herein. Water mains shall be hand backfilled to a minimum cover of 18 inches before mechanical equipment can be used to backfill trench.

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4. Sand Bedding will be required below all pipe unless otherwise shown on the Drawings or specified herein. Crushed Stone is required under utility structures where shown on the Drawings. Granular Fill, Sand Bedding or Crushed Stone shall be placed to the full width of the trench and under utility structure foundations as indicated on the Drawings. After a pipe is bedded, the trench shall be filled to the centerline of the pipe with Granular Fill or Sand Bedding except at the joint. After the joint is inspected, that portion shall be filled in with Sand Bedding. Material under and around the pipe shall be carefully and thoroughly tamped.

5. From the centerline of the pipe to a point 12 inches above the top of the pipe the backfill shall be crushed stone or Sand Fill placed by hand and hand tamped. Above this point, backfill shall be placed in layers six inches deep and each layer shall be compacted with mechanical tampers to not less than 95% of maximum density at optimum moisture of the material. This backfill shall be carried up to the bottom of materials specified to be placed for surfacing requirements.

6. Utilities shall not be laid directly on boulders or other hard material. This material shall be removed as specified herein within trench limits, and within vertical planes one foot outside of structure walls. Backfill will be placed in eight inch lifts and thoroughly compacted. If hand guided compaction equipment is used, fill shall be placed in six inch lifts. Ordinary Fill may be used as backfill in areas as specified herein.

7. Coordinate all utility and trench backfilling with the trades involved.

C. Moisture Control:

1. Variation of moisture content in fill and backfill materials shall be limited to Optimum Moisture

(-l% to +2%). Moisture content shall be as Uniformly distributed as practicable within each lift, and shall be adjusted as necessary to obtain the specified compaction.

2. Material which does not contain sufficient moisture to be compacted to the specified densities shall be moisture conditioned by sprinkling, discing, windrowing, or other method approved by the Soils Engineer.

a. Material conditioned by sprinkling shall have water added before compaction. Uniformly apply water to surface of subgrade or layer of soil material to obtain sufficient moisture content. The Contractor shall maintain sufficient hoses and/or water distributing equipment at the site for this purpose.

3. Material containing excess moisture shall be dried to required Optimum Moisture before it is placed and compacted. Excessively moist soils shall be removed and replaced and shall be scarified by use of plows, discs, or other approved methods, and air-dried to meet the above requirements.

4. Materials which are within the moisture requirements specified above, but which display pronounced elasticity or deformation under the action of earthmoving and compaction equipment, shall be reduced to Optimum Moisture Content, or below, to secure stability.

5. In the event of sudden downpours or other inclement weather, exposed subgrades and fills which, in the opinion of the Soils Engineer become inundated or excessively moistened shall have excess water removed and soil dried as specified above.

3.05 ROUGH GRADING

A. Rough grading shall include the shaping, trimming, rolling and finishing the surface of the sub-base, shoulders, and earth slopes, and the preparation of the sub-base for loam, seeding and paved surfaces. The grading of shoulders and sloped areas may be done by machine methods.

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All ruts shall be eliminated. Grading of subgrades for sports surface and roadway and parking areas shall be finished at the required depth below and parallel to the proposed surface.

1. If, during the progress of rough grading work, water pipe, sewer conduit, drain, or other construction is damaged due to operations under this Contract, the Contractor shall repair all such damage at no additional cost to the Owner and restore damaged areas to their original condition.

2. Do all other cutting, filling and grading to the lines and limits indicated on the Drawings.

Grade evenly to within the dimensions required for grades shown on Drawings and specified herein. No stones larger than four inches (4") in largest diameter shall be placed in upper six inches (6") of fill. Fill shall be left in a compacted state at the end of the work day and sloped to drain.

3. The Contractor shall bring all areas to grades as shown on the Drawings and in the details.

The Owner’s representative, however, may make such adjustments in grades and alignments as are found necessary to avoid special conditions encountered.

4. No rubbish of any description shall be allowed to enter fill material. Such material shall be removed from the site.

5. Complete the grading operations after the utilities installed, site improvements constructed, and all materials, rubbish and debris removed from the site. Leave subgrade for lawns clean at required grades. There must be sufficient grade staking to provide correct lines and grades.

6. Wherever streets, lawns, sidewalks, or other items contained within or outside of Limits of

Contract lines have been excavated in fulfilling the work required under this Contract, this Contractor shall furnish and install all materials necessary to bring finished surfaces level with the existing adjacent surfaces. All work shall be installed to match the existing conditions in accordance with the governing authority. Notify the proper authorities prior to restoring surfaces outside the Contract Limit Lines.

3.06 DUST CONTROL

A. The Contractor shall take all necessary measures and provide equipment and/or materials to minimize dust from rising and blowing across the site and from impacting neighboring residential property. In addition, the Contractor shall control all dust created by construction operations and movement of construction vehicles, both on the site and paved ways at all times using sprinklered water, or other approved means.

B. Dust control is required off-site due to work under this Contract, in addition to watering, sweeping and other methods, the Contractor shall apply calcium chloride in the required amounts to properly control dust. These amounts shall be reviewed by the Owner’s representative prior to application. The Contractor shall maintain and clean public roadways from soil and mud resulting from work under this Contract by use of street sweepers or other approved methods.

C. Do not use oil or similar penetrants. Chemical materials may not be used on subgrades of areas to be seeded or planted.

END OF SECTION