Section 024113 - Site Demolition

This master should be used by designers working on Port of Portland construction projects and by designers working for PDX tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and edited to fit specific project needs.

SECTION 024113 – SITE DEMOLITION

PART 1 - GENERAL

0.1 DESCRIPTION

A. This section describes demolition of items specified herein and shown on the drawings.

0.2 RELATED WORK SPECIFIED ELSEWHERE

A. Section 017419, Construction Waste Recycling

B. Section 028213, Asbestos Abatement

C. Section 028216, Asbestos Management

D. Section 028313, Lead-Based Paint Management

E. Section 028319, Lead-Based Paint Abatement

F. Section 028400, PCB Remediation

G. Section 312000, Site Clearing and Earthwork

0.3 DEFINITIONS

A. Demolish: Completely remove and legally dispose of off Port property.

B. Pavement Removal: Asphalt and portland cement concrete (PCC) pavement, curbs, and sidewalks excavated full depth.

C. Cold Plane Pavement Removal: 1. Asphalt concrete removed to a specified depth from existing pavement surface by cold planing. 2. PCC removed to a specified depth from existing pavement surface by cold planing or grinding.

0.4 WORK ITEMS

A. The work includes but is not limited to, demolition of the following: 1. Slabs: a. Concrete building slabs. b. Concrete steps and porches.

6/1/2018 SITE DEMOLITION D:\Docs\2018-04-30\00ffb1dad5fb4befb61a0e88f9db4549.doc 024113-1 2. Footings: a. Concrete or block building footings and foundations not associated with basements. b. Retaining walls. 3. Pavement: a. Asphaltic or portland cement concrete surfacing and any associated base material. b. Curbing. c. Sidewalks, driveways, parking areas, etc. d. Aggregate surfacing. 4. Cellar: Concrete basements together with footing, foundation walls and floor slabs. 5. Debris shall include but is not limited to: a. Concrete, asphalt, stone, brick, tile, etc. b. Building wood, glass, tar paper, metal, cloth, paper, etc. c. Abandoned vehicles, and automotive parts, tires, boxes, crates, barrels, fencing, etc. d. Be responsible for removing material dumped within the work areas during the time of the contract. 6. Buildings include: a. Houses, sheds, warehouses, barns, trailer houses, etc. b. Footings, slabs, fireplaces, etc., for the buildings. c. Underground disposal system associated with the building. d. Filling or removing septic tanks and cesspools. e. Capping wells. 7. Materials or structures called out by word description on the drawings or in the specifications shall be included as work items. 8. Port signs: “No Trespassing” and “No Dumping” signs and other signs posted by the Port on work items to be removed shall be removed and turned over to the Port.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

0.1 GENERAL

A. Demolish and remove all work items within area in the manner specified.

B. Stones and/or concrete rubble 12 inches or larger shall be disposed of off Port property.

SITE DEMOLITION 6/1/2018 024113-2 D:\Docs\2018-04-30\00ffb1dad5fb4befb61a0e88f9db4549.doc 3.2 is a Port Environmental Affairs specification.

0.2 ENVIRONMENTAL CONSIDERATIONS

A. Nuisance Dust Control: 1. Demolition debris that contains dust or other material that could become airborne or create a nuisance shall either be removed from the work site daily, or shall be covered and secured with tarps or sheeting until removed from the site. 2. Apply a water mist, or other means approved by the Port, on debris to control or mitigate airborne dust or airborne nuisances, unless the material will become friable (i.e., crumble easily) or will dissolve in water. Friable material and material that may dissolve in water shall be securely covered with tarps or sheeting. 3. Demolition debris that becomes friable when wetted or will dissolve in water shall be stored only on impervious surfaces, field-installed ground sheeting, or other barriers.

B. Demolition Debris: 1. Manage demolition material as hazardous waste or solid waste in accordance with these specifications. 2. Unless specifically identified in the contract documents or approved by the Port, no demolition debris shall be placed as fill material or otherwise disposed of on Port property.

Delete the reference below if Section 028213, 028216, 028313, 028319, or 028400 is not included in the project manual. 3. In addition to the conditions described in Section [028213, 028216, 028313, 028319, 028400], use applicable special demolition techniques, material handling, and disposal requirements for demolition debris. 4. Minimize the volume of accumulated demolition debris. 5. Metal and other material salvage or recycling operations shall be performed in a defined area within the work site. 6. Salvage by cutting torch or other mechanical cutting means of any vessel, tank, pipe, or other equipment that contains any liquid (except potable water) shall not be performed on Port property or at the work site unless prior written approval has been obtained from the Port. 7. Temporary storage and piling of demolition debris within 50 feet of the property line is not permitted unless storage piles are covered and secured with tarps or sheeting. The Port may waive this requirement if the material does not contain dust or other materials that could become airborne or contaminate stormwater.

0.3 BUILDING DEMOLITION AND/OR REMOVAL WITHIN THE WORK AREA

A. The work area is defined as the area within 50 feet of the edges of the building.

B. Remove buildings by demolition or relocation. Debris resulting from demolition of buildings shall be immediately removed from Port property.

C. Underground Structures: 1. Break cellar and concrete tank walls off to a minimum depth of 2 feet below adjacent ground level.

6/1/2018 SITE DEMOLITION D:\Docs\2018-04-30\00ffb1dad5fb4befb61a0e88f9db4549.doc 024113-3 2. Break openings through concrete floors and tank bottoms to provide a minimum of one square foot of opening per 100 square feet of floor area.

D. Remove metal septic and fuel tanks. Backfill with material from site and compact. Be responsible for locating septic tanks and/or cesspools and wells associated with an existing structure. Submit the location of these items to the Port before filling or capping work is begun.

E. Cap and seal sewer, drainage, and water lines at a minimum of 2 feet below adjacent ground level.

F. Brush and trees may be removed to facilitate removal of buildings.

G. Cap wells with a tamper-proof cap.

0.4 MISCELLANEOUS DEMOLITION AND/OR REMOVAL WITHIN THE WORK AREA

A. The work area is defined as the area within 25 feet of the edges of the work item.

B. Work items include slabs, footings, pavement, cellars, debris, and materials or structures other than buildings called out by the work description on the drawings.

C. Underground Structures: Comply with Article 3.3 above.

D. No trees shall be removed unless necessary for the completion of the specified work. If a tree must be removed, its stump shall also be removed. No extra payment will be made for tree removal.

E. Blasting will not be permitted.

Coordinate edits to the article below with Section 312300, Trenching, Backfilling, and Compacting.

0.5 REMOVAL AND PLUGGING OF ABANDONED PIPES, CULVERTS, AND MISCELLANEOUS STRUCTURES

A. Abandoned pipes or portions of other exposed items shall be removed a minimum of 2 feet back of face of slope or 2 feet below subgrade.

B. Cap or plug the ends of partially removed pipes, culverts, and miscellaneous structures with concrete to produce a watertight seal.

C. Contact the Port for direction if unidentified utilities are uncovered during the work.

D. Dispose of removed pipes, culverts, and miscellaneous structures off Port property, at no added cost to the Port.

0.6 PAVEMENT REMOVAL

A. Do not begin pavement removal until approved by the Port.

SITE DEMOLITION 6/1/2018 024113-4 D:\Docs\2018-04-30\00ffb1dad5fb4befb61a0e88f9db4549.doc B. Remove pavement to the limits shown on the drawings. Replace pavement removed beyond the limits without Port’s approval as directed and at no added cost to the Port.

C. Cut pavement by methods approved by the Port, except at those locations shown on the drawings which specifically designate saw cutting.

D. Dispose of pavement removal off Port property.

0.7 COLD PLANE PAVEMENT REMOVAL

A. Using a cold planer or grinder, excavate to the limits and depths shown on the drawings.

B. Leave the bottom of the removal area in a roughened condition.

C. Sweep or vacuum the removal area to remove loose asphalt, rock, dirt, and other foreign materials.

D. Dispose of swept and/or vacuumed material off Port property.

Choose one of the following four paragraphs.

E. Dispose of asphalt concrete cold planer cuttings in the asphalt disposal area shown on the drawings.

F. Dispose of cold planer cuttings and/or grindings off Port property.

G. Asphalt concrete cold planer cuttings may be used as aggregate base course. Gradation shall be 95-100 percent passing the 1 1/2-inch sieve and 0-15 percent passing the #200 sieve. Dispose of excess in the asphalt disposal area shown on the drawings.

H. Asphalt concrete cold planer cuttings may be used as aggregate base course. Gradation shall be 95-100 percent passing the 1 1/2-inch sieve and 0-15 percent passing the #200 sieve. Dispose of excess off Port property.

Coordinate with Section 031200, Site Clearing and Earthwork (if used).

0.8 SITE RESTORATION

A. Clear and scarify the surface of the work area to achieve a smooth and bare earth surface free of heavy growth of vegetation and cut natural growth and/or foreign material. Such surface may be obtained by dragging blade or bucket from demolition equipment over the work area.

B. Standing brush and trees may be left in the work area at the Contractor’s option.

C. Grade fill material and borrow sites in a manner to avoid causing interference with existing drainage patterns and to avoid water ponding.

D. Fill shall be made with existing earth from the site and compacted to the extent that it will support rubber-tired construction equipment.

6/1/2018 SITE DEMOLITION D:\Docs\2018-04-30\00ffb1dad5fb4befb61a0e88f9db4549.doc 024113-5 E. Concrete and aggregate may, at the Contractor’s option, be used as fill material provided at least a 2-foot cover of earth is obtained over such material.

F. See Section 312000, Site Clearing and Earthwork.

0.9 DISPOSAL OF DEMOLISHED MATERIALS

A. Remove demolition waste materials from the work site and dispose of them off Port property in accordance with local, state, and federal laws and regulations. 1. Do not allow demolished materials to accumulate on-site. 2. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas.

B. Do not burn demolished materials.

C. See Section 017419, Construction Waste Recycling, for recycling requirements.

0.10 CLEANING

A. Clean adjacent structures and improvements of dust, dirt, and debris caused by building demolition operations. Return adjacent areas to condition existing before building demolition operations began.

END OF SECTION 024113

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