DFS1FD 31 20 00 EARTHWORK 072226DR - pdf.pdf

DARTMOUTH FIRE STATION NO. 1

NEW FUEL DEPOT

DARTMOUTH, MASSACHUSETTS 22 JULY 2026

RT ARCHITECTS, INC.

EARTHWORK

31 20 00-1

SECTION 31 20 00

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. All the Contract Documents, including Drawings, Specifications, including Division 01 - General Requirements and City of Springfield Public Procurement requirements, apply to the Work of this Section.

1.02 DESCRIPTION OF WORK

A. The Work of this Section includes, but is not limited to, furnishing and installation of the following:

1. All materials, equipment, labor and services required for all Earthwork work, including all items incidental thereto, as specified herein and as shown on the Drawings.

B. Include the following:

1. Precast concrete curb as indicated on the Drawings.

2. Excavation, trenching, filling, backfilling, compaction and concrete placement for new handholes, utility structures, utilities, asphalt and concrete pavements, lawn areas and site improvements, including all additional fill materials as required and specified herein.

3. Pumping and/or bailing necessary to maintain excavated spaces free from water from any source whatsoever.

4. Provide graded materials, as specified, for fills, base courses, backfills, loam, grading and seeding as required to match existing to remain.

5. Protect all existing utilities, roads, pavements, lawns and plantings and other improvements from damage due to construction. Restore any damage thereto as a consequence of the Work.

6. Install fencing and safety devices or controls as specified and as necessary.

7. Dust control and clean up.

1.03 RELATED WORK SPECIFIED ELSEWHERE

A. Carefully examine all the Contract Documents for requirements that effect the Work of this Section.

B. Other Specification Sections which directly relate to the Work of this section include, but are not limited to, the following:

1. Section 01 00 00 General Requirements

2. Section 01 26 00 Contract Modification Procedures

3. Section 01 33 00 Submittal Procedures

4. Section 01 77 00 Contract Closeout Procedures

5. Section 01 78 39 Project Record Documents

6. Section 26 00 00 Electrical

7. Section 31 20 00 Earthwork

8. Section 31 22 70 Sedimentation and Erosion Control

9. Section 32 12 16 Paving and Surfacing

10. Section 32 55 40 Above Ground Storage Tank and Equipment

31 20 00-2

1.04 REFERENCE SPECIFICATIONS

A. A.S.T.M. - American Society for Testing and Materials.

B. A.A.S.H.T.O. - American Association of State Highway and Transportation Officials.

C. S.S.H.B. - Standard Specifications for Highways and Bridges, the Commonwealth of Massachusetts, Department of Public Works, latest edition.

1.05 BENCH MARKS AND ENGINEERING

A. The Contractor shall verify dimensions and elevations on the ground and report any discrepancies immediately to the Architect. Any discrepancies not reported prior to construction shall not be the basis for claims for extra compensation.

1.06 PROTECTION

A. All rules and regulations governing the respective utilities shall be observed in executing all work under this Section. All work shall be executed in such a manner as to prevent any damage to existing buildings, streets, curbs, paving, service utility lines, structures and adjoining property. Monuments and bench marks shall be carefully maintained and, if disturbed or destroyed, replaced as directed.

B. The Contractor shall furnish all facilities and materials necessary to prevent the earth at the bottom of excavation from becoming frozen or unsuitable to receive footing or other load bearing units.

C. The Contractor, under this Section, shall provide at his own expense adequate pumping and drainage facilities to keep the excavation sufficiently dry as not to affect adversely the quality or time of placement of concrete or other materials to be installed in the excavated areas.

D. The Contractor shall assume full responsibility for damages caused by him or his Subcontractor's equipment and personnel to the existing buildings and grounds as well as adjoining private property.

E. The work of this Section shall be performed in such a manner as to cause no interference with access by the abutters, Subcontractors or other Contractors to all portions of the site as is necessary for the normal conduct of their work.

1.07 SUBMITTALS

A. Provide submittals in accordance with requirements of Section 01 33 00 – Submittal Procedures

PART 2 - PRODUCTS

2.01 FILL MATERIAL

A. Ordinary Fill - Well-graded, natural inorganic soil approved by the Architect and meeting the following requirements to be used for general filling to subgrades in lawn areas and to within four (4) feet of finished grade beneath pavements other than specified above, and conforming to the following gradation requirements. Soil finer than the No. 200 sieve shall be nonplastic.

U.S. Bureau of Standards Percent Passing

Sieve Size and Number Minimum Maximum

6-inches 100 % ----

No.4 22% 100%

No.50 5% 50%

No.200 0 % 20 %

1. It shall be free of organic or other weak or compressible materials, of frozen materials, trash or other deleterious

31 20 00-3 materials and of stones larger than six (6) inches maximum dimension within two (2) feet of finished grade.

2. It shall be of such nature and character that it can be compacted to the specified densities in a reasonable length of time.

3. 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.

4. It shall have a maximum dry density of not less than one hundred (100) pounds per cubic foot.

5. Material from excavation on the site may be used as ordinary fill if it meets the above requirements.

PART 3 - EXECUTION

3.01 STRIPPING LOAM

A. Stripping shall consist of the removal of all loam to the full depth encountered below the original ground surface, as herein specified or directed by the Architect. Every effort shall be made to strip and stockpile all available loam on the site.

B. All loam so removed shall be stockpiled on the site where directed by the Architect. Loam shall be free of subsoil, stiff clay or hardpan and foreign material such as cinders, ashes, asphalt and wood. The suitability of stripped materials for use as loam shall be determined by the Architect, and his decision shall be final.

C. Stockpiled loam shall be kept separate from other excavated materials and shall be screened, free of roots, stones larger than three-quarter (3/4) inch and other undesirable material that would interfere with planting.

D. Excess loam shall become the property of the contractor and shall be removed from the site at no additional cost to the

Owner.

3.02 EXCAVATION

A. General

1. Excavate for the construction of concrete slab-on-grade, bollards, related site improvements and other structures necessary for completion of the Work. All unsuitable materials within the Limit of Work shall be excavated and removed. Any quantities involving an extra or other adjustment of the Contract Price shall be subject to measurement verification and approval by the Architect prior to the excavation and removal of such materials. Unsuitable materials shall include the following:

a. Pavements, utility structures, and other man-made structures.

b. Peat, organic silt and other organic materials subject to decomposition, consolidation or decay.

c. Miscellaneous fill including sand, gravel, cinders, ash, glass, wood and metal

2. The Contractor shall obtain from the proper authorities locations of all utilities within the scope of this work so that there will be no damage done to such existing utilities. Neither the Owner nor the Architect will be responsible for any such damage, and the Contractor shall restore any structure or utility so damaged without additional compensation.

Written notifications to the appropriate utility agencies shall be made at least ten (10) days prior to the commencement of any work.

3. Excess Material - Suitable excavated material which is required for fill and backfill shall be separately stockpiled as directed by the Architect. All surplus fill other than that required to complete the intent of the Contract shall become the property of the Contractor and shall be disposed of off the property by the General Contractor. All excavated materials which, in the opinion of the Architect, are not suitable for fill or backfill shall be removed and disposed of off the property.

B. Excavation for Concrete Structures

1. Construct surface subgrades including filling prior to excavation for concrete slab-on-grade, bollards, related site improvements and other structures. Excavate to the lines and grades shown on the Drawings and as specified herein

31 20 00-4 to obtain the subgrade for the following items of work:

a. Slabs-on-grade to grades shown on the Drawings. Remove by excavating all unsuitable materials, including peat and organic silt, from under structures and backfill with graded gravel fill compacted in place to subgrades.

b. Excavations shall have twelve (12) inch minimum and twenty-four (24) inch maximum clearance on all sides.

2. Existing services and utilities encountered shall be immediately repaired, protected and maintained in use until relocation of same has been completed or be cut and capped where directed or be prepared for connections when so required. All existing water mains are to be protected to remain in place for future use.

3.03 PROTECTION AND SHORING

A. Protect open excavations with steel plates, fencing, warning lights and other suitable safeguards.

B. Shore and brace excavations as required to maintain them secure and provide sheet piling as necessary to prevent cave-ins. Remove shoring and piling before backfilling is completed and as specified herein.

3.04 FILLS, BACKFILLS AND COMPACTION

A. Samples and Testing

1. All fill material and its placement shall be subject to quality control testing. A qualified laboratory will be selected by the Owner to perform tests on materials. All costs of testing will be paid for by the Owner. Test results and laboratory recommendations shall be available to the Architect.

2. Provide samples of each fill material from the proposed source of supply including on-site sources. Allow sufficient time for testing and evaluation of results before material is needed. Submit samples from alternate source if required.

3. Architect will be sole and final judge of suitability of all material.

4. The laboratory will determine maximum dry density and optimum water content in accordance with A.S.T.M. D-1557, Method D and the in-place density in accordance with A.S.T.M. D-1556.

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

6. Cooperate with laboratory in obtaining field samples of in-place materials after compaction. Furnish incidental field labor in connection with these tests.

B. Fill and Backfill

1. Compact backfill thoroughly with a rammer of suitable weight or with an approved mechanical tamper to achieve compaction of ninety-five (95) percent as specified.

2. Any additional fill materials required for backfilling to subgrades shall be graded fill or ordinary fill as specified.

Backfill shall be compacted to ninety-five (95) percent as specified. No mud, frozen earth or stone more than six (6) inches in greatest diameter or other objectionable material shall be used for refilling. Any selected material required for filling, in addition to earth from trench excavation, shall be furnished and placed by the Contractor.

3.05 NOT USED

3.06 SUBGRADE PREPARATION

A. Bring all areas to required subgrade levels as required to match existing finish grade to remain.

B. Maintain all subgrades for site improvements in satisfactory condition, protected against traffic and properly drained, until the surface improvement is placed. In areas to receive pavement or other surface materials, at top and bottom of embankments, along swales and elsewhere, place sufficient grade stakes to facilitate checking the subgrade levels.

Correct all irregularities, compacting thoroughly any fill materials.

C. Check all manhole covers, grates, valve boxes and similar structures for correct elevation and position and make, or have

31 20 00-5 made, any necessary adjustments in such structures.

D. All subgrades must be inspected and approved by the Architect before paving, loaming or other site improvements are made.

31 20 00-6

3.09 WARNING TAPE OVER BURIED GAS, ELECTRIC, CABLE TV, TELEPHONE

A. Provide and install plastic warning tape over all buried gas, electric and water lines as specified.

B. Warning tape shall be installed according to Manufacturer's recommendations and a minimum of twelve (12) inches below finished grades.

3.10 DUST CONTROL

A. The Contractor shall employ all possible methods and/or materials to prevent the spread of dust. Chemical materials may not be used on subgrades of areas to be seeded or planted.

3.11 CLEAN UP

A. All waste and debris caused by the Work of this Section shall be removed and legally disposed of daily, in accordance with requirements of Section 01 50 00 - Temporary Facilities and Controls

END OF SECTION