OKANG_Base_Specifiactions_501.pdf

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OKANG BASE SPECIFIACTIONS

INDEX

PAGE

SECTION 02050 – DEMOLITION 02050 – 1-3

SECTION 02060 - SELECTIVE DEMOLITION FOR 02060 – 1-5

ASBESTOS ABATEMENT (Removal)

SECTION 02070 – SELECTIVE DEMOLITION 02070 – 1-6

SECTION 02080 – BASIC MATERIALS AND METHODS – PIPED UTILITIES 02080 – 1-12

SECTION 02081 - REMOVAL OF ASBESTOS CONTAINING MATERIALS 02081 – 1-6

SECTION 02084 - DISPOSAL OF ASBESTOS CONTAINING MATERIAL 02084 – 1-2

SECTION 02086 - SPECIAL CONDITIONS - ASBESTOS ABATEMENT 02086 – 1-2

(Removal)

SECTION 02088 - DEMOLITION (NON-FRIABLE ACM LEFT IN BUILDING) 02088 - 1-2

SECTION 02100 - SITE PREPARATION 02100 – 1-3

SECTION 02110 – SITE CLEARING 02110 – 1-3

SECTION 02140 - DEWATERING 02140 – 1-3

SECTION 02160 - EXCAVATION SUPPORT SYSTEMS 02160 – 1

SECTION 02200 – EARTHWORK 02200 – 1-13

SECTION 02205 - EXCAVATION 02205 - 1-3

SECTION 02210 - IRWIN ROAD UNDERCROSSING 02210 – 1-4

SECTION 02215 - SUBGRADE PREPARATION 02215 – 1-2

SECTION 02220 - FILL AND BACKFILL 02220 – 1-9

SECTION 02236 - BASE COURSE 02236 – 1-3

SECTION 02276 - MODULAR RETAINING WALL SYSTEM 02276 – 1-4

SECTION 02356 - DYNAMIC PILE TESTING 02356 – 1-5

SECTION 02365 - STEEL PILES 02365 – 1-10

SECTION 02372 – AUGER CAST PILES 02372 – 1-9

SECTION 02511 – HOT MIXED ASPHALT PAVING 02511 – 1-6

SECTION 02515 – UNIT PAVERS 02515 – 1-4

SECTION 02520 – PORTLAND CEMEMT CONCRETE PAVING 02520 – 1-11

SECTION 02521 - CONCRETE CURBS, SIDEWALKS AND PAVEMENTS 02521 – 1-5

SECTION 02660 - PRESSURE WATER DISTRIBUTION SYSTEM PIPING 02660 – 1-12

SECTION 02662 - WATER SERVICE CONNECTIONS 02662 – 1-5

SECTION 02683 - DISINFECTION OF WATER SYSTEMS 02683 – 1-6

SECTION 02700 - GRAVITY PIPING FOR STORM DRAIN AND SANITARY 02700 – 1-4

SEWER SERVICE CONNECTIONS

SECTION 02700-02 CORRUGATED METAL PIPE AND FITTINGS 02700-02 –1

SECTION 02700-06 POLYVINYL CHLORIDE (PVC) PIPE AND FITTINGS 02700-06 - 1

SECTION 02721 - CATCH BASINS 02721 – 1 - 5

SECTION 02810 – UNDERGROUND IRRIGATION SYSTEM 02810 – 1-6

SECTION 02831 – CHAIN LINK FENCES AND GATES 02831 – 1-7

SECTION 02900 – LANDSCAPE WORK 02900 – 1-11

SECTION 03300 – CAST-IN-PLACE CONCRETE 03300 – 1-19

SECTION 03301 - REINFORCED CONCRETE 03301 – 1-8

SECTION 03600 – GROUT 03600 - 1-5

SECTION 04200 – UNIT MASONRY 04200 – 1-19

SECTION 05120 – STRUCTURAL STEEL 05120 – 1-10

SECTION 05210 – STEEL JOISTS 05210 – 1-7

SECTION 05310 – STEEL DECK 05310 – 1-5

SECTION 05500 – METAL FABRICATIONS 05500 – 1-12

SECTION 05810 – EXPANSION JOINT COVER ASSEMBLIES 05810 – 1-3

SECTION 06100 – ROUGH CARPENTRY 06100 – 1-6

SECTION 06402 – INTERIOR ARCHITECTURAL WOODWORK 06402 – 1-9

SECTION 06410 - CABINETWORK - PLASTIC LAMINATE 06410 – 1-7

SECTION 07110 – SHEET MEMBRANE WATERPROOFING 07110 – 1-4

SECTION 07210 – BUILDING INSULATION 07210 – 1-5

SECTION 07240 - EXTERIOR INSULATION AND FINISH SYSTEM 07240 – 1-7

SECTION 07270 – FIRESTOPPING 07270 – 1-8

SECTION 07310 - ASPHALT SHINGLES 07310 – 1-4

SECTION 07411 – MANUFACTURED ROOF PANELS 07411 – 1-11

SECTION 07412 – MANUFACTURED WALL PANELS 07412 – 1-11

SECTION 07530 – SINGLE-PLY MEMBRANE ROOFING 07530 – 1-6

SECTION 07620 – SHEET METAL FLASHING AND TRIM 07620 – 1-7

SECTION 07720 – ROOF ACCESSORIES 07720 – 1-4

SECTION 07901 – JOINT SEALANTS 07901 – 1-8

SECTION 08111 – STANDARD STEEL DOORS AND FRAMES 08111 – 1-7

SECTION 08211 – FLUSH WOOD DOORS 08211 – 1-5

SECTION 08305 – ACCESS DOORS 08305 – 1-3

SECTION 08307 – FLOOR DOORS 08307 – 1-2

SECTION 08331 – OVERHEAD COILING DOORS 08331 – 1-6

SECTION 08333 – ROLLING COUNTER DOORS 08333 – 1-4

SECTION 08370 – OVERHEAD HOIST-UP FABRIC DOOR 08370 – 1-7

SECTION 08410 – ALUMINUM ENTRANCES AND STOREFRONTS 08410 – 1-8

SECTION 08520 – ALUMINUM WINDOWS 08520 – 1-8

SECTION 08710 – FINISH HARDWARE 08710 – 1-12

SECTION 08800 – GLASS AND GLAZING 08800 – 1-11

SECTION 09255 – GYPSUM BOARD ASSEMBLIES 09255 – 1-12

SECTION 09260 – METAL STUDS AND GYPSUM BOARD ASSEMBLIES 09260 – 1-8

SECTION 09300 – TILE 09300 – 1-9

SECTION 09500 – ACOUSTICAL TREATMENTS 09500 – 1-7

SECTION 09511 – ACOUSTICAL PANEL CEILINGS 09511 – 1-7

SECTION 09650 – RESILIENT FLOORING 09650 – 1-7

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SECTION 09680 – CARPET 09680 – 1-6

SECTION 09800 – SPECIAL COATINGS 09800 – 1-9

SECTION 09900 – PAINTING 09900 – 1-12

SECTION 09911 – REFLECTIVE CHEMICALLY RESISTANT URETHANE

(CRU) FLOOR COATING 09911 – 1-9

SECTION 10100 – VISUAL DISPLAY BOARDS AND CASES 10100 – 1-5

SECTION 10155 – TOILET COMPARTMENTS 10155 – 1-5

SECTION 10200 – LOUVERS AND VENTS 10200 – 1-7

SECTION 10265 – WALL SURFACE PROTECTION SYSTEMS 10265 – 1-3

SECTION 10425 – SIGNS 10425 – 1-5

SECTION 10505 – METAL LOCKERS 10505 – 1-5

SECTION 10522 – FIRE EXTINGUISHERS, CABINETS AND ACCESSORIES 10522 – 1-4

SECTION 10620 – OPERABLE PARTITIONS 10620 – 1-5

SECTION 10800 – TOILET AND BATH ACCESSORIES 10800 – 1-4

SECTION 12511 – HORIZONTAL LOUVER BLINDS 12511 – 1-4

SECTION 12690 – FLOOR MATS AND FRAMES 12690 – 1-3

SECTION 14330 – BRIDGE CRANES 14330 – 1-5

02050 - 1 DEMOLITION

SECTION 02050 - DEMOLITION

PART 1 GENERAL

1.1 SECTION INCLUDES

A. Utility lines, and other items to be demolished and/or abandoned are as shown.

1.2 SUBMITTALS

A. Quality Control Submittals:

1. Schedule of demolition, as part of and consistent with the progress schedule specified in Section 01310, PROGRESS/CRITICAL PATH SCHEDULES.

2. Copies of any authorizations and permits required to perform Work.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION

3.1 PREPARATION

A. Utilities:

1. Notify CONTRACTING OFFICER or appropriate utilities to turn off affected services before starting demolition or alterations.

2. Remove utility lines exposed by demolition excavation.

3. Remove electric, sanitary, water, and storm drainage adjacent to buildings to be demolished.

4. Excavate utility lines serving buildings to be demolished and provide a permanent leak-proof closure for water and gas lines.

3.2 DEMOLITION

A. Drawings define minimum required demolition. Unless otherwise shown, rough cuts or breaks may be made exceeding limits of demolition shown.

B. Core drill floor slabs, catch basins, and other concrete improvements to remain in place below ground, or break holes at structure's lowest point to allow water to freely migrate through.

02050 - 2 DEMOLITION

C. Remove piping as shown and from any other areas that interfere with CONTRACTOR’s work. Pipe, valves, and fittings adjacent to those to be removed may also be removed as salvage.

D. Cut off concealed or embedded conduit, boxes, or other materials a minimum of 6 inches below final finished surface.

E. Perform site cleanup daily before leaving the work site. Store equipment in a neat and orderly arrangement.

F. Abandonment of Buried Utility Piping Systems:

1. Plug pipelines at exposed excavations and at manholes or other utility structures with minimum 5-foot long concrete plug.

2. Manholes/wet wells/drainage structures:

a. Remove frames and covers/grates for salvage.

b. Remove structures shown on Drawings.

c. Backfill as described herein.

G. Demolition of utility poles, street signs and similar items:

1. Remove entire structure, including portions below ground.

2. Remove and separate items for salvage.

3. Backfill as described herein.

3.3 DISPOSAL

A. Dispose of debris and other nonsalvaged materials off base at location selected by

CONTRACTOR.

3.4 BACKFILLING

A. Demolished Areas: Backfill to existing ground level or foundation level of new construction.

B. Backfill Material and Compaction:

02100 - 3 SITE PREPARATION

E. All material which is unsuitable for use as topsoil or backfill, and material not required for backfill, shall be disposed of off-base by the CONTRACTOR.

3.7 SALVAGE

A. Saleable timber may be sold to CONTRACTOR's benefit. Promptly remove from

Base.

3.8 DISPOSAL

A. Clearing and Grubbing Debris:

1. Dispose of debris off base.

2. Woody debris may be chipped. Chips may be sold to CONTRACTOR's benefit or used for landscaping onsite as mulch or uniformly mixed with topsoil, provided that resulting mix will be fertile and not support combustion.

Maximum dimensions of chipped material used onsite shall be 1/4-inch by 2 inches. Dispose of chips that are unsaleable or unsuitable for landscaping or other uses with unchipped debris off base.

3. Limit off base disposal of clearing and grubbing debris to locations off base that are approved by federal, state, and local authorities.

B. Scalpings: As specified for clearing and grubbing debris.

C. Strippings:

1. Dispose of strippings that are unsuitable for topsoil or that exceed quantity required for topsoil off base.

2. Stockpile topsoil in sufficient quantity to meet Project needs. Dispose of excess strippings as specified for clearing and grubbing.

END OF SECTION

02110 - 1 SITE CLEARING

SECTION 02110 - SITE CLEARING

PART 1 - GENERAL

RELATED DOCUMENTS

Drawings and general provisions of Contract, including General and Division 1 Specification Sections, apply to this Section.

SUMMARY

This Section includes the following:

Removal of vegetation. Refer to Specification Section 02900 for relocation of existing trees.

Topsoil stripping.

Clearing and grubbing.

Removing existing above-grade and below-grade site improvements within construction limits.

Refer to Specification Section 02070.

PROJECT CONDITIONS

Traffic: Conduct site clearing operations to ensure minimum interference with roads, streets, walks, and other adjacent occupied or used facilities. Do not close or obstruct streets, walks or other occupied or used facilities without permission from Government and authorities having jurisdiction.

Protection of Existing Improvements: Provide protections necessary to prevent damage to existing improvements to remain in place.

Protect improvements on adjoining properties and on Government’s property.

Restore damaged improvements to their original condition, as acceptable to property owners.

EXISTING SERVICES

General: Indicated locations are approximate; determine exact locations and elevations of all utilities before commencing Work.

Place markers to indicate location of underground services. Identify locations on Project Record Documents.

PART 2 - PRODUCTS

02110 - 2 SITE CLEARING

Not applicable to this Section.

PART 3 - EXECUTION

SITE CLEARING

General: Remove shrubs, grass and other vegetation, improvements, or obstructions as required to permit installation of new construction. Removal includes digging out and off-site disposing of stumps, roots, and other underground obstructions.

Refer to Specification Section 02070 for removal of existing site pavements and underground concrete rubble.

Topsoil: Topsoil is defined as friable clay loam surface soil found in a depth of not less than 4 inches.

Satisfactory topsoil is reasonably free of subsoil, clay lumps, stones, and other objects over 2 inches in diameter, and without weeds, roots, and other objectionable material.

Strip topsoil in a manner to prevent intermingling with underlying subsoil or other objectionable material. Remove heavy growths of grass before stripping.

Stockpile topsoil in storage piles in areas as directed. Construct storage piles to provide free drainage of surface water. Cover storage piles, if required, to prevent wind erosion.

Stripped topsoil, if approved by Landscape Architect, shall be used exclusively for finish grading.

Dispose of unsuitable topsoil same as specified for disposal of waste material.

Provide new topsoil as required to comply with Specification Section 02900.

Clearing and Grubbing: Clear site of trees, shrubs and other vegetation, except for those indicated to remain.

Completely remove stumps, roots, and other debris protruding through ground surface.

Fill depressions caused by clearing and grubbing operations with satisfactory soil material, unless further excavation or earthwork is indicated.

Place fill material in horizontal layers not exceeding 6 inches loose depth, and thoroughly compact to specified criteria per Section 02200.

Removal of Improvements: Remove existing improvements as necessary to facilitate new construction.

02110 - 3 SITE CLEARING

DISPOSAL OF WASTE MATERIALS

Burning on Government’s Property: Burning is not permitted on Government’s property, unless Burning Permit is obtained.

Removal from Government’s Property: Remove waste materials and unsuitable topsoil from Government’s property and dispose of in lawful manner.

END OF SECTION 02110

02140 - 1 DEWATERING

SECTION 02140 - DEWATERING

1.1 SUBMITTALS

A. Administrative Submittals:

1. Well permits.

2. Discharge permits.

1.2 WATER CONTROL PLAN

A. As a minimum, include:

1. Descriptions of proposed groundwater and surface water control facilities including, but not limited to, equipment; methods; standby equipment and power supply, pollution control facilities, discharge locations to be utilized, and provisions for immediate temporary water supply as required by this section.

2. Drawings showing locations, dimensions, and relationships of elements of each system.

3. Design calculations demonstrating adequacy of proposed dewatering systems and components.

B. If system is modified during installation or operation revise or amend and resubmit Water Control Plan.

PART 2 PRODUCTS (NOT USED) PART 3

EXECUTION

3.1 GENERAL

A. Remove and control water during periods when necessary to properly accomplish Work.

3.2 SURFACE WATER CONTROL

A. See Section 01500, CONSTRUCTION FACILITIES AND TEMPORARY

CONTROLS, Article TEMPORARY CONTROLS.

02140 - 2 DEWATERING

B. Remove surface runoff controls when no longer needed.

3.3 DEWATERING SYSTEMS

A. Provide, operate, and maintain dewatering systems of sufficient size and capacity to permit excavation and subsequent construction in dry and to lower and maintain groundwater level a minimum of 2 feet below the lowest point of excavation.

Continuously maintain excavations free of water, regardless of source, and until backfilled to final grade.

B. Design and Operate Dewatering Systems:

1. To prevent loss of ground as water is removed.

2. To avoid inducing settlement or damage to existing facilities, completed Work, or adjacent property.

3. To relieve artesian pressures and resultant uplift of excavation bottom.

C. Provide sufficient redundancy in each system to keep excavation free of water in event of component failure.

D. Provide 100 percent emergency power backup with automatic startup and switchover in event of electrical power failure.

3.4 DISPOSAL OF WATER

A. Obtain discharge permit for water disposal from authorities having jurisdiction.

B. Treat water collected by dewatering operations, as required by regulatory agencies, prior to discharge.

C. Discharge water as required by discharge permit and in manner that will not cause erosion or flooding, or otherwise damage existing facilities, completed Work, or adjacent property.

3.5 PROTECTION OF PROPERTY

A. Make assessment of potential for dewatering induced settlement. Provide and operate devices or systems, including but not limited to reinjection wells, infiltration trenches and cutoff walls, necessary to prevent damage to existing facilities, completed Work, and adjacent property.

B. Securely support existing facilities, completed Work, and adjacent property vulnerable to settlement due to dewatering operations. Support shall include, but not be limited to, bracing, underpinning, or compaction grouting.

02140 - 3 DEWATERING

END OF SECTION 02140

SECTION 02160 - EXCAVATION SUPPORT SYSTEMS

PART 1 GENERAL (NOT USED) PART 2

PRODUCTS (NOT USED) PART 3 EXECUTION

A. Design, provide, and maintain shoring, sheeting, and bracing as necessary to support the sides of excavations and to prevent detrimental settlement and lateral movement of existing facilities, adjacent property, and completed Work.

3.2 REMOVAL OF EXCAVATION SUPPORT

A. Remove excavation support in manner that will maintain support as excavation is backfilled and not leave voids in backfill.

B. Do not begin to remove excavation support until support can be removed without damage to existing facilities, completed Work, or adjacent property.

3.3 TRENCHES

A. For trench excavation exceeding 5 feet in depth, provide adequate safety system meeting requirements of applicable state and local construction safety orders, and federal requirements.

EXCAVATION SUPPORT SYSTEMS 02160 - 1

02200 - 1 EARTHWORK

SECTION 02200 - EARTHWORK

RELATED DOCUMENTS

Drawings and general provisions of Contract, including General and Division 1 Specification Sections, apply to this Section.

SUMMARY

This Section includes the following:

Preparing and grading subgrades for building slabs, walks, and pavements.

Preparing stabilized low volume change zone for support of building slabs and pavements.

Excavating and backfilling for underground mechanical and electrical utilities and buried site, mechanical, and electrical appurtenances.

Importing and placing required soil fill materials.

Backfilling of void created by removal of underground concrete rubble. Refer to Section 02070.

Related Sections: The following Sections contain requirements that relate to this Section.

Division 2 Section “Selective Demolition” for removal of underground concrete rubble.

Division 2 Section "Site Clearing" for site stripping including removal of trees and vegetation.

Division 2 Section “Excavation, Trenching and Backfilling for Utilities”, for trenching and backfilling.

Division 2 Section "Landscape Work" for finish grading, including importing, placing and preparing topsoil for lawns and planting.

DEFINITIONS

Excavation consists of removal of material encountered to subgrade elevations indicated, including removal of unacceptable existing fill materials beneath foundation bearing levels and slabs-on-grade. All footings shall bear on acceptable underlying native soils and all unsuitable material shall be removed and disposed of.

Unauthorized excavation consists of removal of materials beyond indicated subgrade elevations or dimensions without specific direction of Contracting Officer. Unauthorized excavation, as well as

02200 - 2 EARTHWORK

remedial work directed by Contracting Officer, shall be at Contractor's expense.

Under footings, fill unauthorized excavation by extending indicated bottom elevation of footing or base to excavation bottom, without altering required top elevation. Lean concrete fill may be used to bring elevations to proper position, when acceptable to Contracting Officer and Soil Testing Lab.

In locations other than those above, backfill and compact unauthorized excavations as specified for authorized excavations of same classification, unless otherwise directed by Contracting Officer.

Subgrade: The undisturbed earth or the compacted soil layer immediately below slabs, pavements, or topsoil materials.

Structure: Buildings, foundations, slabs, curbs, or other man-made stationary features occurring above or below ground surface.

Borrow: Soil material obtained off-site when sufficient approved soil material is not available from excavations.

SUBMITTALS

Test Reports: Submit the following reports directly to Contracting Officer’s Representative and Architect from the testing services, with copy to Contractor:

Test reports on fill and borrow material, including laboratory analysis.

Verification of suitability of each footing subgrade material, in accordance with specified requirements.

Field reports; in-place soil density tests.

One optimum moisture-maximum density curve for each type of soil material.

Report of actual unconfined compressive strength and/or results of bearing tests.

QUALITY ASSURANCE

Codes and Standards: Perform earthwork and excavation work in compliance with applicable requirements of authorities having jurisdiction.

Testing and Inspection Service: Contractor shall employ and pay for a qualified independent geotechnical testing laboratory to classify proposed on-site fill and borrow soils to verify that soils comply with specified requirements and to perform soil testing and inspection service during earthwork operations.

Pre-installation Conference: Conduct conference at Project site

Before commencing earthwork, meet with the Contracting Officer’s Representative, Architect, 02200 - 3 EARTHWORK

Geotechnical Engineer, independent testing agency, and other concerned entities. Review earthwork procedures and responsibilities including testing and inspection procedures and requirements. Notify participants at least 3 working days prior to convening conference. Record discussions and agreements and furnish a copy to each participant.

PROJECT CONDITIONS

Site Information: Data in subsurface investigation report was used for the basis of the design and is available to the Contractor for information only. Conditions are not intended as representations or warranties of accuracy or continuity between soil borings. It is expressly understood that neither Government nor Architect will be responsible for interpretations or conclusions drawn from this data by Contractor.

Additional test borings and other exploratory operations may be performed by the Contractor, at the Contractor's option; however, no change in the Contract Sum will be authorized for such additional exploration.

Existing Utilities: Locate existing utilities in areas of excavation work. If utilities are indicated to remain in place, provide adequate means of support and protection during earthwork operations.

Should uncharted, or incorrectly charted, piping or other utilities be encountered during excavation, consult utility owner immediately for directions. Cooperate with Government and utility companies in keeping respective services and facilities in operation. Repair damaged utilities to satisfaction of utility owner.

Do not interrupt existing utilities serving occupied facilities, except when permitted in writing by Contracting Officer and then only after acceptable temporary utility services have been provided.

Provide minimum of 48-hour notice to Contracting Officer and receive written notice to proceed before interrupting any utility.

Use of Explosives: Use of explosives is not permitted.

Protection of Persons and Property: Barricade open excavations occurring as part of this work and post with warning lights and other appropriate barriers.

Operate warning lights as recommended by authorities having jurisdiction.

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

SOIL MATERIALS

02200 - 4 EARTHWORK

General: Obtain approved borrow soil materials from adjacent stockpiles when sufficient approved soil materials are not available from excavations.

Satisfactory soil materials for fill and backfill:

Clean excavated materials or approved borrow material free from organic material and debris.

Silty or sandy clay with a maximum liquid limit of 35% and plasticity index less than 15 but no less than 5.

Silty or clayey sand with a minimum 15% fines by dry weight passing #200 sieve.

ACCESSORIES

Warning Tape: Acid-and alki-resistant polyethylene film warning tape manufactured for marking and identifying underground utilities, 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility.

PREPARATION

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

Protect subgrades and foundation soils against freezing temperatures or frost. Provide protective insulating materials as necessary.

Provide erosion control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways.

EXCAVATION

Excavation is unclassified and includes excavation to subgrade elevations indicated, regardless of character of materials and obstructions encountered.

STABILITY OF EXCAVATIONS

General: Comply with local codes, ordinances, and requirements of agencies having jurisdiction.

Contractor shall obtain Digging Permit prior to commencing excavation.

All excavations shall be constructed and shored in accordance with OSHA requirements.

Slope sides of excavations to comply with local codes, ordinances, and requirements of agencies having

02200 - 5 EARTHWORK

jurisdiction. Shore and brace where sloping is not possible because of space restrictions or stability of material excavated. Maintain sides and slopes of excavations in safe condition until completion of backfilling.

Shoring and Bracing: Provide materials for shoring and bracing, such as sheet piling, uprights, stringers, and cross braces, in good serviceable condition. Maintain shoring and bracing in excavations regardless of time period excavations will be open. Extend shoring and bracing as excavation progresses.

DEWATERING

Dewatering methods shall be in accordance with the “Guidebook of Best Management Practices for Michigan Watersheds.”

Prevent surface water and subsurface or groundwater from flowing into excavations, from ponding on prepared subgrades, and from flooding project site and surrounding area.

Protect subgrades and foundation soils from softening and damage by rain or water accumulation.

Do not allow water to accumulate in excavations. Remove water to prevent softening of foundation bottoms, undercutting footings, and soil changes detrimental to stability of subgrades and foundations. Provide and maintain pumps, well points, sumps, suction and discharge lines, and other dewatering system components necessary to convey water away from excavations.

Establish and maintain temporary drainage ditches and other diversions outside excavation limits to convey rainwater and water removed from excavations to collecting or runoff areas. Do not use trench excavations as temporary drainage ditches.

STORAGE OF EXCAVATED MATERIALS

Stockpile excavated materials acceptable for backfill and fill where directed. Place, grade, and shape stockpiles for proper drainage. Cover, if required, to prevent wind-blown dust.

Locate and retain soil materials away from edge of excavations.

EXCAVATION FOR STRUCTURES

Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10 foot, and extending a sufficient distance from footings and foundations to permit placing and removal of concrete formwork, installation of services, and other construction and for inspection.

Excavations for footings and foundations: Do not disturb bottom of excavation. Excavate by hand to final grade just before concrete reinforcement is placed. Trim bottoms to required lines and grades to leave solid base to receive other work.

EXCAVATION FOR PAVEMENTS AND WALKS

02200 - 6 EARTHWORK

Cut surface under pavements and walks to comply with elevations and grades as indicated.

COLD WEATHER PROTECTION

Protect excavation bottoms against freezing when atmospheric temperature is less than 35o F.

BACKFILL AND FILL

General: Place soil material in layers to required subgrade elevations, for each area classification listed below, using materials specified in this Section.

Under grassed areas, use satisfactory excavated or fill material. Provide topsoil, minimum depth 6", for finish grading as specified in Section 02900.

Under building slabs, use satisfactory fill material and stabilized low volume change zone. Clean sand is unacceptable as a fill material.

Under pavements and walks, use satisfactory fill material and stabilized low volume change zone.

Under piping and conduit, use subbase materials where required over rock bearing surface and for correction of unauthorized excavation. Shape excavation bottom to fit bottom 90o of cylinder.

Backfill trenches with concrete where trench excavations pass within 18 inches of column or wall footings and that are carried below bottom of such footings or that pass under wall footings. Place concrete to level of bottom of adjacent footing.

Concrete is specified in Division 3.

Do not backfill trenches until tests and inspections have been made and backfilling is authorized by Contracting Officer. Use care in backfilling to avoid damage or displacement of pipe systems.

Provide 4-inch-thick concrete base slab support for piping or conduit 8 inches and smaller and less than 2'-6" below surface of roadways and pavements. After installation and testing of piping or conduit, provide minimum 4-inch-thick encasement (sides and top) of concrete prior to backfilling or placement of pavement subbase.

Utility trenches entering the structure from the exterior shall be plugged a minimum of 4 feet on each side of the exterior building foundation wall with compacted natural clay fill or low cement sand mix (2 sack) concrete as approved by Soil Testing Lab.

Backfill excavations as promptly as work permits, but not until completion of the following:

Acceptance of construction below finish grade including, where applicable, waterproofing and perimeter insulations.

Inspection, testing, approval, and recording locations of underground utilities have been performed and recorded.

02200 - 7 EARTHWORK

Removal of concrete formwork.

Removal of shoring and bracing, and backfilling of voids with satisfactory materials. Cut off temporary sheet piling driven below bottom of structures and remove in manner to prevent settlement of the structure or utilities, or leave in place if required.

Removal of trash and debris from excavation.

Install warning tape directly above utilities, 12 inches below finished grade, except 6 inches below pavements and slabs.

PLACEMENT AND COMPACTION

Ground Surface Preparation: Remove vegetation, debris, unsatisfactory soil materials, obstructions, and deleterious materials from ground surface prior to placement of fills.

Strip topsoil from construction areas as specified in Section 02110. Topsoil shall be used exclusively for finish grading.

Following topsoil removal, strip existing on-site fill material and miscellaneous debris from under building slabs on grade and pavements. A minimum of 18 inches of existing fill shall be removed and replaced with newly compacted fill under the building floor slab. Exact extent of existing fill material to be removed shall be determined by Soil Testing Lab.

Site preparation procedures shall be applied a minimum of one foot laterally beyond all edges of footing foundations or pavements for each foot of vertical fill required, or a minimum of five feet beyond the edge of building slabs on grade or pavements, whichever is greater.

Following completion of stripping and grading operations, and prior to any scarification, exposed subgrades shall be proofrolled with several passes, in mutually perpendicular directions, using rubber-tired heavy construction equipment weighing a minimum of 25 tons. Suitable proofrolling equipment would include such items as a fully loaded dump truck or scraper. Proofrolling operations shall be observed by qualified geotechnical personnel. Any area which cannot be satisfactorily densified in-place shall be removed and replaced with approved, properly compacted fill material.

All unsuitable materials, including materials that become soft and yielding during proofrolling operations, shall be removed and replaced with acceptable and properly compacted fill material.

Following completion of proofrolling activities and correction of all problem areas, exposed subgrades shall be scarified to a minimum depth of 6 inches, then adjusted in moisture content and compacted as herein specified.

All fill materials shall be free from organic matter and debris and shall consist of approved materials acceptable to Soil Testing Lab. Fill materials shall have a liquid limit of less than 35%, a maximum Plasticity Index of 15, a minimum Plasticity Index of 5, and contain a minimum of 15% fines (material passing the #200 sieve).

02200 - 8 EARTHWORK

All compacted fill shall be placed under controlled conditions and placed under observation of Soil Testing Lab representative.

Place backfill and fill 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.

Before compaction, moisten or aerate each layer as necessary to provide specified moisture content.

Compact each layer to required percentage of maximum dry density or relative dry density for each area classification. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice.

Place backfill and fill materials evenly adjacent to structures, piping, or conduit to required elevations.

Prevent wedging action of backfill against structures or displacement of piping or conduit by carrying material uniformly around structure, piping, or conduit to approximately same elevation in each lift.

COMPACTION AND MOISTURE CONTROL

General: Control soil compaction during construction providing minimum and maximum percentages of density specified for each area classification and moisture contents as indicated.

Compaction: Maximum dry density shall be as determined by ASTM Designation D-1557.

Compaction for filling and backfill operations shall be as follows:

1. Fill under Footings: Minimum of 95% of maximum dry density.

2. Fill under Floor Slabs: Minimum of 92% of maximum dry density.

3. Fill under Pavements: Minimum of 95% of maximum dry density.

4. Non-Structural Fill and Backfill: Minimum of 85% of maximum dry density.

Moisture Content: Moisture content shall be controlled during construction based on an acceptable range of moisture content as determined by Modified Proctor, ASTM D-1557. Moisture content shall be as follows:

1. Fat Clay, Lean Clay: Minimum of 2% above optimum moisture content.

(CH, CL, MH)

2. Silts, Clayey Sand, Sandy Clay: 2% to + 2% of optimum moisture content.

(GM, GC, SM, SC, ML)

3. Sands, Gravel: At workable moisture content.

(GM, GP,SW, SP)

Footing Foundations: Footings shall bear on underlying native soils.

02200 - 9 EARTHWORK

All footing excavations shall be inspected by Soil Testing Lab to ensure that all existing fill is removed.

All bearing materials shall be evaluated by qualified geotechnical personnel at the time of foundation construction. Evaluation shall be accomplished by performing one test probe at each isolated foundation location and additional probes as determined by the testing agency along continuous footings.

Test probes shall extend a minimum of 3 feet below foundation bearing level or into underlying native soils. In-situ testing and testing of recovered samples from probes shall be performed as necessary to adequately evaluate bearing materials encountered.

Unsuitable existing fill and objectionable materials shall be removed and foundations shall be lowered to bear on approved, suitable material. Any over excavation required because of unsuitable soils shall extend laterally in all directions beyond the edges of the foundation, a minimum of 8 inches for each 12 inches of over excavated depth.

Care shall be taken to minimize wetting or drying of the exposed soil during foundation construction. All loosened or disturbed material, or extremely wet or dry material, shall be removed from the foundation excavation prior to placing reinforcing steel and concrete.

Building Floor Slabs: Scarified subgrade and fill material below floor slabs, shall be adjusted in moisture content and compacted as specified.

All newly placed fill material beneath floor slabs shall consist of approved material, free from organic matter and debris. All fill shall be placed as soon as possible following scarifying procedures in order to minimize drying or excessive wetting of exposed subgrade soils.

Fill material used beneath floor slabs shall be as herein specified and shall be examined and approved by Soil Testing Lab prior to use. A stabilized low volume change zone shall be constructed beneath floor slabs as specified.

Pavements: Exposed subgrades shall be scarified and adjusted in moisture content and compacted as specified.

A stabilized low volume change zone shall be constructed beneath pavements as specified.

Moisture Control: Where subgrade or layer of soil material must be moisture conditioned before compaction, uniformly apply water to surface of subgrade or layer of soil material. Apply water in minimum quantity as necessary to prevent free water from appearing on surface during or subsequent to compaction operations.

Remove and replace, or scarify and air dry, soil material that is too wet to permit compaction to specified density. Where soils become too dry, take appropriate measures to develop the minimum moisture level.

Soil material that has been removed because it is too wet to permit compaction may be stockpiled or spread and allowed to dry. Assist drying by discing, harrowing or pulverizing until moisture content is reduced to a satisfactory value.

02200 - 10 EARTHWORK

Correct improperly compacted areas or lifts as directed by Contracting Officer if soil density tests indicate inadequate compaction.

BUILDING SLAB AND PAVEMENT STABILIZED SUBGRADE

General: Stabilized subgrade consists of placing stabilized materials, in layers to specified thickness, and compacting to specified density with proper moisture content, over subgrade surface supporting building slabs and pavements.

Stabilized Subgrade: A low volume change zone shall be constructed below floor slabs and pavements.

Low volume change zone shall be a minimum of 12" thick, exclusive of any granular level course under floor slabs and a minimum of 9" thick under pavements.

Low volume change zone under floor slabs may be constructed of either imported low volume change fill materials acceptable to Soil Testing Lab or stabilized on-site cohesive soils.

Imported fill material used to develop low volume change zone shall consist of soils as specified and as acceptable to Soil Testing Lab. Limestone screenings may be used as approved by Soil Testing Lab.

Low volume change zone under pavements shall be constructed of stabilized in-place soils.

On-site soils shall be stabilized with hydrated lime. A minimum of 4% lime shall be used, based on the dry unit weight of the soil.

Stabilizing agent shall be completely and uniformly blended into site soils using mechanical mixers. Application procedures shall be performed in accordance with MDOT requirements.

Low volume change zone materials, including percentage of stabilization material, shall be approved by Soil Testing Lab. Provide written documentation of acceptability of low volume change materials from Soil Testing Lab.

The lift thickness, moisture content, and compaction of stabilized low volume change zone material shall be as specified for building floor slabs and pavements.

The stabilized low volume change zone under pavements and aprons shall extend a minimum distance of 1 foot beyond the edge of driveways, pavements, and aprons.

GRADING

General: Uniformly grade areas within limits of grading under this section, including adjacent transition areas. Smooth finished surface within specified tolerances, compact with uniform levels or slopes between points where elevations are indicated or between such points and existing grades.

Grading Outside Building Lines: Grade areas adjacent to building lines to drain away from structures and to prevent ponding.

02200 - 11 EARTHWORK

Finish surfaces free from irregular surface changes and as follows:

Lawn or Unpaved Areas: Finish areas to receive topsoil to within not more than 0.10 foot above or below required subgrade elevations.

Walks: Shape surface of areas under walks to line, grade, and cross-section, with finish surface not more than 0.10 foot above or below required subgrade elevation.

Pavements: Shape surface of areas under pavement to line, grade, and cross-section, with finish surface not more than ½ inch above or below required subgrade elevation.

Positive Drainage: Topsoil and fill material shall be sloped at a minimum grade of 5% for a minimum distance of 10 feet to provide positive drainage away from building foundations, slabs-on-grade, pavements and sidewalks.

Grading Surface of Fill under Building Slabs: Grade smooth and even, free of voids, compacted as specified, and to required elevation. Provide final grades within a tolerance of ½ inch when tested with a 10-foot straightedge.

Compaction: After grading, compact subgrade surfaces to the depth and indicated percentage of maximum density for each area classification.

TOPSOIL

Topsoil shall be stockpiled for re-use in finish grading if acceptable to Contracting Officer. If quality or quantity of stockpiled topsoil is inadequate or insufficient, provide additional topsoil as required to provide a 6" minimum thickness over area within disturbed construction limits.

Provide new topsoil that is fertile, friable, natural loam, surface soil, free of subsoil, clay lumps, brush, weeds and other litter, and free of roots, stumps, stones larger than 2 inches in any dimension, and other extraneous or toxic matter harmful to plant growth.

Obtain topsoil from local sources or from areas having similar soil characteristics to that found at project site. Obtain topsoil only from naturally, well-drained sites where topsoil occurs in a depth of not less than 4 inches. Do not obtain from bogs or marshes.

FIELD QUALITY CONTROL

Quality Control Testing During Construction: Allow testing service to inspect and approve each subgrade and fill layer before further backfill or construction work is performed.

Perform field density tests in accordance with ASTM D 1556 (sand cone method) or ASTM D 2167 (rubber balloon method), as applicable.

Field density tests may also be performed by the nuclear method in accordance with ASTM

02200 - 12 EARTHWORK

D 2922, providing that calibration curves are periodically checked and adjusted to correlate to tests performed using ASTM D 1556. In conjunction with each density calibration check, check the calibration curves furnished with the moisture gages in accordance with

ASTM D 3017.

If field tests are performed using nuclear methods, make calibration checks of both density and moisture gages at beginning of work, on each different type of material encountered, and at intervals as directed by the Contracting Officer.

Footing Subgrade: For each strata of soil on which footings will be placed, perform at least one test to verify required design bearing capacities and perform test probes as specified. Subsequent verification and approval of each footing subgrade may be based on a visual comparison of each subgrade with related tested strata when acceptable to Contracting Officer and Soil Testing Lab.

Paved Areas and Building Slab Subgrade: Perform at least one field density test of subgrade for every 2,000 sq. ft. of paved area or building slab, but in no case fewer than three tests.

In each compacted fill layer, perform one field density test for every 2,000 sq. ft. of overlaying building slab or paved area, but in no case fewer than three tests.

Foundation Wall Backfill: Perform at least two field density tests at locations and elevations as directed.

If subgrade or fills that have been placed are below specified density, perform additional compaction and testing until specified density is obtained.

EROSION CONTROL

Provide erosion control methods in accordance with requirements of authorities having jurisdiction and as shown on the drawings.

MAINTENANCE

Maintenance Program: A regular maintenance program shall be implemented during the construction period to identify areas where water is standing adjacent to building foundations. These areas shall be repaired immediately to provide positive drainage away from the building.

Protection of Graded Areas: Protect newly graded areas from traffic and erosion. Keep free of trash and debris.

Repair and reestablish grades in settled, eroded, and rutted areas to specified tolerances.

Reconditioning Compacted Areas: Where completed compacted areas are disturbed by subsequent construction operations or adverse weather, scarify surface, reshape, and compact to required density prior to further construction.

Settling: Where settling is measurable or observable at excavated areas during general project warranty period, remove surface (pavement, lawn, or other finish), add backfill material, compact, and replace

02200 - 13 EARTHWORK

surface treatment. Restore appearance, quality, and condition of surface or finish to match adjacent work, and eliminate evidence of restoration to greatest extent possible.

DISPOSAL OF EXCESS AND WASTE MATERIALS

Removal from Government’s Property: Remove waste materials, including unacceptable excavated material, trash and debris, and legally dispose of it off Government’s property.

END OF SECTION 02200

02205 - 1 EXCAVATION

SECTION 02205 - EXCAVATION

1.1 SUBMITTALS

A. Shop Drawings:

1. Excavation Plan, Detailing:

a. Methods and sequencing of excavation.

b. Proposed locations of stockpiled excavated material.

c. Proposed spoil disposal sites.

d. Anticipated difficulties and proposed resolutions.

1.2 QUALITY ASSURANCE

A. Provide adequate survey control to avoid unauthorized overexcavation.

1.3 WEATHER LIMITATIONS

A. Material excavated when frozen or when air temperature is less than 32 degrees F shall not be used as fill or backfill until material completely thaws.

B. Material excavated during inclement weather shall not be used as fill or backfill until after material drains and dries sufficiently for proper compaction.

1.4 SEQUENCING AND SCHEDULING

A. Demolition: Complete applicable Work specified in Section 02050, DEMOLITION, prior to excavating.

B. Clearing, Grubbing, and Stripping: Complete applicable Work specified in Section 02100, SITE PREPARATION, prior to excavating.

C. Dewatering: Conform to applicable requirements of Section 02140, DEWATERING, prior to initiating excavation.

PART 2 PRODUCTS (NOT USED) PART 3

02205 - 2 EXCAVATION

A. Excavate to lines, grades, and dimensions shown and as necessary to accomplish Work. Excavate to within tolerance of plus or minus 0.1-foot except where dimensions or grades are shown or specified as maximum or minimum. Allow for forms, working space, granular base, topsoil, and similar items, wherever applicable. Trim to neat lines where concrete is to be deposited against earth.

B. Overexcavation Beneath Finished Grade:

1. Column Footings: 2 feet below final grade, maximum.

2. Slab-on-Grade: 1 foot below final grade, maximum.

C. Backfill overexcavation as specified in Section 02220, FILL AND BACKFILL.

D. Remove or protect obstructions as shown and as specified in Section 01500, CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS, Article

PROTECTION OF WORK AND PROPERTY.

3.2 UNCLASSIFIED EXCAVATION

A. Excavation is unclassified. Complete all excavation regardless of the type, nature, or condition of the materials encountered.

3.3 TRENCH WIDTH

A. Minimum Width of Trenches:

1. Single Pipes, Conduits, Direct-Buried Cables, and Duct Banks:

a. Less than 4-inch Outside Diameter or Width: 18 inches.

b. Greater than 4-inch Outside Diameter or Width: 18 inches greater than outside diameter or width of pipe, conduit, direct-buried cable, or duct bank.

2. Multiple Pipes, Conduits, Cables, or Duct Banks in Single Trench: 18 inches greater than aggregate width of pipes, conduits, cables, duct banks, plus space between.

3. Increase trench widths by thicknesses of sheeting.

B. Maximum Trench Width: Unlimited, unless otherwise shown or specified, or unless excess width will cause damage to existing facilities, adjacent property, or completed Work.

02205 - 3 EXCAVATION

3.4 EMBANKMENT AND CUT SLOPES

A. Shape, trim, and finish cut slopes to conform with lines, grades, and cross-sections shown, with proper allowance for topsoil or slope protection, where shown.

B. Remove stones and rock that exceed 3-inch diameter and that are loose and may roll down slope. Remove exposed roots from cut slopes.

C. Round tops of cut slopes in soil to not less than a 6-foot radius, provided such rounding does not extend offsite or outside easements and right-of-ways, or adversely impacts existing facilities, adjacent property, or completed Work.

3.5 STOCKPILING EXCAVATED MATERIAL

A. Stockpile excavated material that is suitable for use as fill or backfill until material is needed.

B. Post signs indicating proposed use of material stockpiled. Post signs that are readable from all directions of approach to each stockpile. Signs should be clearly worded and readable by equipment operators from their normal seated position.

C. Confine stockpiles to within easements, rights-of-way, and approved work areas.

Do not obstruct roads or streets.

D. Do not stockpile excavated material adjacent to trenches and other excavations unless excavation sideslopes and excavation support systems are designed, constructed, and maintained for stockpile loads.

E. Do not stockpile excavated materials near or over existing facilities, adjacent property, or completed Work, if weight of stockpiled material could induce excessive settlement.

3.6 DISPOSAL OF SPOIL

A. Dispose of excavated materials, which are unsuitable or exceed quantity needed for fill or backfill, off base.

B. Dispose of debris resulting from removal of underground facilities as specified in Section 02050, DEMOLITION, for demolition debris.

C. Dispose of debris resulting from removal of organic matter, trash, refuse, and junk as specified in Section 02100, SITE PREPARATION, for clearing and grubbing debris.

02088 - 1 DEMOLITION (NON-FRIABLE ACM LEFT IN BUILDING

SECTION 02210 - IRWIN ROAD UNDERCROSSING

1.1 WORK INCLUDED

A. This section covers the work necessary for construction of the bore and jacking of 16-inch casing pipe under Irwin Road.

1.2 GENERAL

A. Prevent surface disturbance or damage to Irwin Road.

B. Trenchless methods acceptable for the pipe undercrossing include boring and jacking.

1.3 SUBMITTALS

A. Submit Undercrossing Plan detailing the construction. Include specific information as described below:

1. Schedule showing the sequence of operations for undercrossing activities.

2. Layout Plan showing pits, staging areas, and special actions and procedures required for the method selected.

3. Procedures for preventing surface damage or movement including grouting around casing pipe if appropriate.

4. Procedure for protecting adjacent utilities from damage.

5. Procedures for installing carrier pipe within casing pipe including installation of supports.

6. Procedures for grouting voids outside of casing pipe.

7. Methods for disposal of drilling mud, if used.

B. Shop Drawings of all products specified herein or required for the construction.

C.…