EARTHWORK

EARTHWORK


PART 1 -- GENERAL

1.01     SUMMARY

Division 0, Contract requirements and Division 1, General Conditions apply to this section.

1.02     SCOPE OF WORK

Perform all Excavating, Backfilling and Grading as shown on the Drawings as specified herein, and as specified in the standard specifications for Public Works Construction (Green Book) latest edition, and as per the soils report.

1.03     CONDITIONS AT SITE

A. Visit the site.  Examine and note all conditions as to the character and extent of Work involved.

B.         EXISTING UTILITIES

1. Where existing utilities (not shown on the Drawings) are encountered, support, shore-up, protect same and immediately notify engineer.   Allow entrance opportunity and ample time for measures necessary for continuance and/or relocation of such services.

2. Where noted on Drawings, cut and cap all street connections encountered in the excavating  along  curb  line  and  mark  location  so  they  can  subsequently  be located and reconnected as required.

C.         ADJACENT PROPERTY

1. Restore any damage to adjacent properties, streets and the like caused by operations of this Section to original condition without additional cost to Owner.

1.04     QUALITY CONTROL

A.         PERMITS & ORDINANCES

1. Procure  and  pay  for  all  necessary  permits  or  certificates  required  by  local authorities having jurisdiction over the Work.

2.         Comply with all applicable Federal, State and Local ordinances.

B.         TESTS, INSPECTIONS AND SUPERVISION

1. Contractor shall provide Construction Grade Stakes for rough grade, pad blue tops and fine grading of landscape berms.

2.     Contractor shall make every effort to preserve stakes.

3. Site  Work  Contractor  shall  give  the  Work  his  personal  supervision.    In  his absence he shall leave a responsible representative in charge who shall have the authority to receive and execute orders from the Architect, or his representative.

1.05     DEMOLITION AND SITE CLEARING

A.         The site shall be cleared and prepared for fill material in accordance with the Soil Report.
Contractor shall visit the site prior to Bid to ascertain extent of existing to be removed.

B.         Saw-cut and remove all asphalt paving and concrete curbs, etc., as indicated on the
Drawings and as required.

C.         Remove all material and legally dispose of it off the site.

D. Repair any damage done to Owner's property or property of others on or off the premises as a result of the work.

E. Do not close or obstruct streets, sidewalks, drives, etc. without permission, or store materials in same.

F. Upon completion of this work, remove temporary protective devices, tools, materials, equipment and rubbish of every sort and leave site in neat and orderly condition.

1.06     SUBSTITUTIONS

Substitutions will be considered per Article 6.4 of the General Conditions.

1.07     SUBMITTALS

In accordance with Article 6.13 of the General Conditions.


PART 2 -- PRODUCTS

2.01     BACKFILL

Native material: on-site soils free of organic material are suitable.


PART 3 -- EXECUTION

3.01     LAYOUT

Layout of all work under this Section shall be made by a survey crew as engaged by the
Contractor.

3.02     PUMPING AND DRAINAGE

A.         Keep all excavations, pits, trenches, footings, etc., entirely free from water.

B. Protect excavations from rain or water from any source during construction.  Use suitable pumping equipment or other means as required by conditions.   Continue pumping as necessary until completion of project or until released by Construction Manager.

C. When operations are interrupted by unfavorable weather conditions, prepare areas by grading and compaction to avoid ponding and erosion.

3.03     SITE PREPARATION

As per Soils Investigation Report.

3.04     EXCAVATION

A. Detention Basin:  Excavate the detention basin to the dimensions and contours shown on the grading plan and place the fill material on the site as needed. The Contractor shall fine grade the detention basin soon after beginning of construction to prepare for hydroseeding by the Landscape Contractor.

B. Excavate to depths noted on Drawings, as required for proper completion of all footings and other subgrade level Work, and cut to sufficient size to provide ample room for construction of forms, shoring and bulk-heading as required.

C.         Backfill any excess excavation under footings with concrete at Contractor's expense.

D. Shore and brace excavations where necessary to prevent cave-ins, and in accordance with all safety laws and codes.

3.05     TRENCHING

For undergrounding piping, electrical conduits, etc., shall be done by the trade installing the pipes, conduits, etc.  Backfilling of trenches shall be accomplished with native material backfilled to a relative compaction of 90 percent in accordance with ASTM D-1557.

3.06     STOCKPILE AREAS

Excavated or imported materials to be used as backfill or fill shall be stockpiled within the working areas.  Contractor shall not interfere with the Work of other Contractors and shall not stockpile material within 10 feet of new construction or existing construction to remain.

3.07     BACKFILL AROUND STRUCTURE

Place  earth  backfill  suitable  to  support  planting  and  landscape  materials  around  structure. Deposit backfill material in horizontal lifts not exceeding 8 inches loose thickness and compact each lift to 90% relative compaction.

3.08     BACKFILL OR FILL IN ASPHALT OR CONCRETE AREAS

Where finish grade is designated to be concrete, place Class 2 base backfill to subgrade elevations shown.  Deposit in horizontal lifts not exceeding 8 inches loose thickness and compact each lift to not less than 90% relative compaction to within 12 inches of subgrade elevation. Relative compaction shall be 95% in the top 12 inches below subgrade elevations.

3.09     LANDSCAPING PLANTER AREAS

Construct planters of select landscape fill to the lines, grades and contours shown, allowing for thickness of any topsoil to be provided by the Landscape Contractor.  Place material in loose lifts not exceeding 12 inches in thickness and compact each lift to 85% relative compaction.  Make surfaces free of exposed roots and stones. Toes of slopes shall flare evenly and smoothly into surrounding surfaces. Final locations and contours shall be approved by Architect.

3.010   COMPACTION TESTS

Field tests of in-place density and moisture content shall be conducted in accordance with the soils report.

3.011   SETTLEMENT

Any settlement in backfill or fill, which occurs during the warranty period and is attributable to construction procedures, such as improper removal of shoring or insufficient compaction shall be corrected by Contractor at his own expense.   Any structures, paved areas, piping or other facilities damaged by such settlement shall be restored to their condition prior to settlement by Contractor at his own expense.

3.012   FINISH GRADING

Perform all finish grading required, as indicated or reasonably inferred to permit installation of Work of others as shown on Drawings.  At completion of Work, entire site shall be left in a clean and finished condition conforming to plans and specifications.

3.013   CLEANING AND SURPLUS MATERIAL

A. Conduct Work in an orderly manner and so as not to create nuisance.  Dirt shall not be permitted to accumulate on streets or sidewalks nor to be washed into sewers.

B. Remove  from the site and  legally  dispose  of  all  debris and excavated material not required for fill. No rubbish or debris shall be buried on the site.

3.014   TEMPORARY BLOWSAND CONTROL FENCING

A. The Contractor shall install and maintain the temporary Blow Sand Control Fencing in the locations shown on the plans and as determined, during construction to be beneficial for workers on the site or to prevent complaints from neighboring property owners.

B.         This item is not intended to replace watering as a means of dust control.

C. The fence material shall be an ultra violet resistant fabric specifically intended for the purpose of blow sand control.   The materials, posts, method of attachment shall be reviewed and approved by the Owner prior to installation.