Mooney s Bay Section

Transcription

1 Mooney s Bay Section General Scope of Work Page 1 of General 1.1 The following is a general scope of work intended to assist the Contractor in assessing the work involved for the Mooney s Bay 2.0 Mobilization 2.1 Provide 8-foot modular construction fencing and signage as necessary to separate the Work area from the remainder of the surrounding public area. Lay-down area for materials storage to be approved by the City of Ottawa. 2.2 Provide environmental protections and abatement during the work as specified in Sections: - Section : Lead-Based Paint Test Area Precautions; - Section : Lead-Based Paint Abatement Intermediate Precautions - Section : Lead-Based Paint Abatement Maximum Precautions 3.0 Demolition 3.1 Notify the Consultant for review of the existing structure in conjunction with the Contractor prior to commencing Work. 3.2 Remove and dispose of the existing plank decking, guard rails, and any other deleterious materials to expose existing glulam beam structure and cross bracing. 4.0 Glulam Beam Coating Removal 4.1 Sample Removal Area: Clean all loose, deleterious materials including creosote and paint residue from a minimum of three 500x500mm sample areas at the inside vertical surface of the existing glulam beams. Do not remove more than 5mm thickness of the wood substrate during cleaning. Provide 72 hours notice to Consultant for review of sample cleaned area. Cleaning methods may include: - Provide One Area: Preparation using hand tools and solvent based paint removers (In conjunction with Section Intermediate Precautions); - Provide Two Areas: Preparation using sandblasting with soda, crushed glass, or crushed walnut shell (In conjunction with Section Maximum Precautions) 4.2 Upon approval of the Sample Removal Area by the City and Consultant, proceed to clean all deleterious materials using the chosen cleaning method from the exterior surfaces of the entire glulam bridge structure. Do not remove more than 5mm thickness of the wood substrate during cleaning.

2 Mooney s Bay Section General Scope of Work Page 2 of Cross Bracing Replacement 5.1 Remove and replace existing cross bracing between glulam beam members. Remove only one set of braces at a time and install new set of braces prior to removing and replacing subsequent sets. Using new pressure-treated members as per the project specifications and drawings, match the existing size, layout and fastening profile of the existing cross bracing. 6.0 New Decking and Guards 6.1 Upon completion of the glulam beam coating removal, install new dampproofing membrane to the top surface of the glulam beams. Ensure membrane terminates on the horizontal cross section of the beam and is not visible from grade after the new bridge deck is installed. 6.2 Install new pressure treated wood decking and guardrails using galvanized steel fasteners as per the project specifications and drawings. 1. Note: Build-out new stairs at the ends of the bridge generally as per the project drawings and specifications. New stairs are to be constructed of the same cross section of wood as the bridge deck. Risers and horizontal supports shall also be constructed of the same cross section of wood as the bridge deck, double-ply, set on the short edge and trimmed to match the curve of the bridge. Ensure all stair risers are the same height plus/minus 6mm. 2. Note: Provide a base price for straight sections of top and bottom rail, with joints at each post in order to match the mid-point tangent slope of the existing bridge between each post. Provide an optional price to install a curved top and bottom rail to match the curve radius of the existing bridge. 7.0 Coatings and Finishes 7.1 Optional Glulam Waterproofing Sealer: At the glulam beams, apply a 500x500mm sample area of environmentally safe, water based, breathable, high binding, colour tint-able, clear acrylic, penetrating waterproofing sealer at an interior surface of the beam for review and testing by the Consultant and the City. Provide optional colourant to be selected by the City from standard colour options. Upon approval of the test area, apply the waterproofing sealer to the entire exposed exterior surfaces of the glulam beams as per the project specifications and manufacturer s instructions. 7.2 Pressure Treated Lumber Waterproofing Sealer: After installation of new wood components, allow minimum 8 months time to pass (3 seasons) prior to installing any coatings or finishes to the pressure treated lumber. Apply a new environmentally safe, water based, breathable, high binding, colour tint-able, clear

3 Mooney s Bay Section General Scope of Work Page 3 of 3 acrylic, penetrating waterproofing sealer to all pressure-treated wood components of the South Bridge as per the project specifications, drawings, and manufacturer s instructions. This includes all posts, pickets, rails, and decking. Provide optional colourant to be selected by the City from standard colour options. 7.3 Bridge Deck Anti-Slip Coating: After installation of waterproofing sealer at the bridge deck, apply a new environmentally safe, non-flammable, non-hazardous, waterborne, acrylic based, quartz, non-cementitious, anti-slip coating that is compatible with the waterproofing sealer. Provide optional colourant to be selected by the City from standard colour options. Apply the anti-slip coating across all pedestrian surfaces as per the project specifications, drawings and manufacturer s instructions. END OF SECTION

4 Mooney s Bay Section Carpentry and Wood Treatments Page 1 of 5 PART 1 - GENERAL 1.1 SECTION INCLUDES.1 Installation of wood members in accordance with specified materials, condition requirements and procedures. 1.2 REFERENCES.1 Canadian Standards Association (CSA International).1 CSA B111-[74(R1998)], Wire Nails, Spikes and Staples..2 CAN/CSA-O80 Series-[08], Wood Preservation..2 National Evaluation Reports (US):.1 National Evaluation Report (NER): Report No. NER-628 Preservative Treated Wood.3 American Wood-Preservers Association (AWPA).1 AWPA.M2-[07], Wood Treatment..4 ASTM International (ASTM).1 ASTM F-1677, ASTM F-1679, Coefficient of Friction Test (Anti-Skid Test). 1.3 QUALITY ASSURANCE.1 Contractors undertaking work in this section are required to be skilled craftsmen and to have a minimum of 5 years of experience in this field..2 Lumber by grade stamp of an agency certified by Canadian Lumber Standards Accreditation Board. 1.4 STORAGE AND PROTECTION 1.5 WASTE MANAGEMENT AND DISPOSAL.1 Deliver, handle, store and protect materials in a clean, dry environment. Protect materials from increased moisture levels..1 Separate and recycle waste materials to the maximum extent economically possible..2 Do not burn scrap at the project site..3 Place materials defined as hazardous or toxic waste in designated containers..4 Seal and store emptied containers safely away

5 Mooney s Bay Section Carpentry and Wood Treatments Page 2 of 5 PART 2 - PRODUCTS from children for disposal..5 Dispose of surplus chemical and finishing materials in accordance with federal, provincial and municipal regulations. 2.1 MATERIALS.1 All New Lumber: Softwood, S4S, moisture content S-Dry graded, micronized copper pressure treated and stamped in accordance with the following standards:.1 CSA NLGA Standard Grading Rules for Canadian Lumber..3 Micronized copper pressure treatment to NER Sized as required to match project drawings..2 Miscellaneous fasteners:.1 Spikes and Deck Screws: to CSA B111 flat head, round shank, diamond point mm hot dipped galvanized..2 Deck Screws: to CSA B111 flat head, hot dipped galvanized, sized as shown on project drawings..3 Bolts: 12.5mm diameter, hot dipped galvanized, complete with nuts and washers..3 Sealers/Coatings:.1 Waterproofing Sealers: Acrylic emulsion waterproofing sealer, 10% solids by weight. Provide optional water-based colourants for approval and selection by City. Approved Products:.1 #5990 Excel Waterproofing Sealer by GH International;.2 Or approved equivalent..2 Anti-Slip Coating: Acrylic based, quartz, non-cementitious, anti-slip coating to ASTM F-1677 and ASTM F Provide optional acrylic enamel paint additive for coulourants

6 Mooney s Bay Section Carpentry and Wood Treatments Page 3 of 5 PART 3 - EXECUTION as per manufacturer s recommendation for approval of City. Approved Products:.1 #5551 Excel Anti-Slip Coating by GH International;.2 Or approved equivalent. 3.1 ACCEPTABLE INSTALLERS.1 Work to be executed by skilled craftsmen trained in this field, according to best practice. 3.2 EXAMINATION.1 Stop work and report immediately to Departmental Representative evidence of structural deficiencies, unacceptable conditions, fungal activity or insect infestation not described on drawings which may affect the scope of the work and durability of the finished product. 3.3 PREPARATION.1 Remove all existing wood decking, wood guards, and other deleterious materials to fully expose glulam beams and cross bracing..2 Sample Glulam Beam Coating Removal: Clean all loose, deleterious materials including creosote and paint residue from a minimum of three 500x500mm sample areas at the inside vertical surface of the existing glulam beams. Employ different cleaning methods at each sample area. Cleaning methods may include: Provide One Sample Area: Use hand tools to scrape away all deleterious materials; Provide Two Sample Areas: Sandblasting using either soda, crushed glass, or crushed walnut shell; Or approved equivalent. Provide 72 hours notice to Consultant for review of sample cleaned area. Upon approval by the City and Consultant, proceed to clean all deleterious materials using the chosen cleaning method from the exterior surfaces of the entire glulam bridge structure. Do not remove more than 5mm thickness of the wood substrate during cleaning.

7 Mooney s Bay Section Carpentry and Wood Treatments Page 4 of CONSTRUCTION.1 Remove and replace existing cross bracing between glulam beam members. Remove only one set of braces at a time and install new set of braces prior to removing and replacing subsequent sets. Match the existing size, layout and fastening profile of the existing cross bracing. Using new pressure-treated members as per the project specifications and drawings.2 Install new self-adhering, damp-proofing membrane on the top surface of the glulam beams as per the Drawings. Submit material specifications for damp-proofing to Consultant for review and approval prior to installation..3 Install the new wood bridge deck, vertical posts, rails and pickets as per the project drawings. All wood products to be micronized pressure treated (pressure treatment finish colour natural brown) as specified..4 Note: Build-out new stairs at the ends of the bridge generally as per the project drawings and as follows: New stairs are to be constructed of the same cross section of wood as the bridge deck. Risers and horizontal supports shall also be constructed of the same cross section of wood as the bridge deck, double-ply, set on small edge and trimmed to match the curve of the existing glulam beams. Ensure all stair risers are the same height plus/minus 6mm. Ensure the run of the stairs remains within plus/minus 50mm between the bottom step and the top step..4 General:.1 Fit corner joints and intersecting members accurately..2 Contractor to confirm all dimensions on site. Job dimensions, where applicable are to govern size of fabricated units.

8 Mooney s Bay Section Carpentry and Wood Treatments Page 5 of Wood Treatment.1 Waterproofing Sealer at Glulam Beams: Apply the waterproofing sealer to a 500x500mm sample area of the glulam beam for review and testing by the Consultant and the City. Upon approval of the test area, apply the waterproofing sealer the entire exposed exterior surfaces of the glulam beams..2 Schedule: All additional wood treatments specified below shall be carried out after a specified seasoning time period: - Minimum: 8 months - Maximum: 12 months -.3 Waterproofing Sealer: Apply a waterproofing sealer to all pressure treated wood members as per the manufacturer s instructions..4 Bridge Deck Anti-Slip Coating: Apply a non-slip coating across all pedestrian surfaces, as per the manufacturer s instructions. END OF SECTION

9 Mooney s Bay Section LEAD - BASED PAINT TEST AREA PRECAUTIONS Page 1 Part 1 General 1.1 SUMMARY.1 Comply with requirements of this Section when performing following Work:.1 Performing Sample Removal Area: Cleaning all loose, deleterious materials including creosote and paint residue from a minimum of three 500x500mm sample areas at the inside vertical surface of the existing glulam beams. Cleaning methods may include: Sandblasting using either soda, crushed glass, or crushed walnut shell; or brush-cleaning/scraping using hand tools. 1.2 SECTION INCLUDES.1 Requirements and procedures for abatement of lead based paints modified procedures for test sample areas. 1.3 RELATED SECTIONS.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Lead-based paint abatement Intermediate Precautions ( ).3 Lead-based paint abatement Maximum Precautions ( ) 1.4 DEFINITIONS 1.5 REFERENCES.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Health Canada.1 Workplace Hazardous Materials Information System (WHMIS), Material Safety Data Sheets (MSDS)..3 Human Resources and Social Development Canada (HRSDC).1 Canada Labour Code Part II, - SOR Occupational Health and Safety Regulations..4 Transport Canada (TC).1 Transportation of Dangerous Goods Act, 1992 (TDGA). 1.6 DEFINITIONS.1 HEPA vacuum: High Efficiency Particulate Air filtered vacuum equipment with filter system capable of collecting and retaining fibres greater than 0.3 microns in any direction at 99.97% efficiency..2 Authorized Visitors: Owner, Departmental Representative, Engineer, Consultant or designated representatives and representatives of regulatory agencies.

10 Mooney s Bay Section LEAD - BASED PAINT TEST AREA PRECAUTIONS Page 2.3 Occupied Area: work site that is outside Work Area..4 Sprayer: garden reservoir type sprayer or airless spray equipment capable of producing mist or fine spray. Must be appropriate capacity for scope of work..5 Airlock: ingress or egress system, without permitting air movement between contaminated area and uncontaminated area. Consisting of two curtained doorways at least 2 m apart..6 Curtained doorway: arrangement of closures to allow ingress and egress from one room to another. Typically constructed as follows:.1 Place two overlapping polyethylene sheets over existing or temporarily framed doorway, securing each along top of doorway, securing vertical edge of one sheet along one vertical side of doorway, and secure other sheet along opposite vertical side of doorway..2 Reinforce free edges of polyethylene with duct tape and add weight to bottom edge to ensure proper closing..3 Overlap each polyethylene sheet at openings 1.5 m on each side..7 Action level: employee exposure, without regard to usage of respirators, to an airborne concentration of lead of 50 micrograms per cubic meter of air calculated as 8 hour timeweighted average (TWA). Intermediate precautions for lead abatement are based on airborne lead concentrations greater than 0.05 milligrams per cubic meter of air within Work Area..8 Competent person: individuals capable of identifying existing lead hazards in workplace and taking corrective measures to eliminate them..9 Lead in Dust: wipe sampling on vertical and/or horizontal surfaces, dust and debris is considered to be lead contaminated if it contains more than 40 micrograms of lead in dust per square foot. 1.7 SUBMITTALS.1 Provide proof satisfactory to Consultant that suitable arrangements have been made to dispose of lead based paint waste in accordance with requirements of authority having jurisdiction..2 Quality Control:.1 Provide proof satisfactory to Consultant that employees have had instruction on hazards of lead exposure, respirator use, dress, entry and exit from Work Area, and aspects of work procedures and protective measures..2 Provide proof that supervisory personnel have attended lead abatement course, of not less than two days duration, approved by Consultant. Minimum of one supervisor for every ten workers. 1.8 QUALITY ASSURANCE.1 Regulatory Requirements: comply with Provincial and local requirements pertaining to lead paint, in case of conflict among those requirements or with these specifications more stringent requirement applies. Comply with regulations in effect at time work is performed..2 Health and Safety:

11 Mooney s Bay Section LEAD - BASED PAINT TEST AREA PRECAUTIONS Page 3.1 Do construction occupational health and safety in accordance with the Ontario Occupational Health and Safety Act..2 Safety Requirements: worker and visitor protection..1 Protective equipment and clothing to be worn by workers and visitors in Work Area includes:.1 NIOSH approved half-face respirator and equipped with P-100 filter cartridges. Provide sufficient filters so workers can install new filters following disposal of used filters and before re-entering contaminated areas..2 Disposable type protective clothing that does not readily retain or permit skin contamination, consisting of full body covering including head covering with snug fitting cuffs at wrists, ankles, and neck..2 Requirements for workers:.1 Remove street clothes outside Work Area and put on respirator with new filters or reusable filters, clean coveralls and head covers before entering Work Area. Store street clothes, uncontaminated footwear, towels, and similar uncontaminated articles outside Work Area..2 Remove gross contamination from clothing before leaving Work Area. Place contaminated work suits in receptacles for disposal with other lead - contaminated materials. Upon completion of lead abatement, dispose of footwear as contaminated waste or clean thoroughly inside and out using soap and water before removing from Work Area..3 Eating, drinking, chewing, and smoking are not permitted in Work Area..4 Ensure workers wash hands and face when leaving Work Area..5 Provide and post the procedures described in this Section, in both official languages..6 Ensure no person required to enter Work Area has facial hair that affects seal between respirator and face..7 Visitor Protection: 1.9 WASTE MANAGEMENT AND DISPOSAL.1 Provide protective clothing and approved respirators to Authorized Visitors to Work Areas..2 Instruct Authorized Visitors in use of protective clothing, respirators and procedures..3 Instruct Authorized Visitors in proper procedures to be followed in entering into and exiting from Work Area..1 Disposal of lead waste generated by removal activities must comply with Provincial regulations. Dispose of lead waste in sealed double thickness 6 ml bags or leak proof drums. Label containers with appropriate warning labels EXISTING CONDITIONS.1 Reports and information pertaining to lead based paint to be handled, removed, or otherwise disturbed and disposed of during this Project are available upon request.

12 Mooney s Bay Section LEAD - BASED PAINT TEST AREA PRECAUTIONS Page 4 Part 2 Products 2.1 MATERIALS.1 Polyethylene: 0.15mm unless otherwise specified; in sheet size to minimize joints..2 FR polyethylene: 0.15mm woven fibre reinforced fabric bonded both sides with polyethylene..3 Tape: fibreglass - reinforced duct tape suitable for sealing polyethylene under dry conditions and wet conditions using amended water..4 Slow - drying sealer: non-staining, clear, water - dispersible type that remains tacky on surface for at least 8 hours and designed for trapping residual lead paint residue. Part 3 Execution 3.1 SUPERVISION.1 Approved Supervisor must remain in the vicinity of Work Area during disturbance, removal, or other handling of lead based paints. 3.2 PREPARATION.1 Work Area Modified Proceedure:.1 Cover ground surfaces in work area with two layers of polyethylene drop sheets..2 Affix one layer of polyethylene drop sheet to existing bridge on the three exposed sides. Tape and seal to floor or ground surface to extent practicable..2 Separation of Occupied Areas.1 Barriers between Occupied Area and general public area to be constructed as follows:.1 Caution tape 5 m in circumference from work area..3 Maintenance of Enclosures:.1 Maintain area in clean condition..2 Ensure barriers and polyethylene linings are effectively sealed and taped. Repair damaged barriers and remedy defects immediately. 3.3 LEAD - BASED PAINT ABATEMENT.1 Remove lead based paint in small sections and pack as it is being removed in sealable 0.15mm plastic bags and place in labelled containers for transport..2 After completion of stripping work, clean work areas using HEPA vacuum. If not practicable, use wet cleaning method. Do not use methods that raise dust, such as dry sweeping, or vacuuming using other than HEPA vacuum. 3.4 FINAL CLEANUP.1 Following specified cleaning procedures, proceed with final cleanup.

13 Mooney s Bay Section LEAD - BASED PAINT TEST AREA PRECAUTIONS Page 5.2 Remove polyethylene sheet by rolling it away from walls to centre of work area. Vacuum visible lead containing particles observed during cleanup, immediately, using HEPA vacuum equipment..3 Place polyethylene seals, tape, cleaning material, clothing, and other contaminated waste in plastic bags and sealed labelled waste containers for transport..4 Clean-up Work Areas, and other contaminated enclosures..5 Clean-up sealed waste containers and equipment used in Work and remove from work areas..6 Conduct final check to ensure no dust or debris remains on surfaces as result of dismantling operations. 3.5 RE-ESTABLISHMENT OF OBJECTS AND SYSTEMS.1 Repair or replace objects damaged in course of work to their original state or better, as directed by Consultant. END OF SECTION

14 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 1 Part 1 General 1.1 SUMMARY.1 Comply with requirements of this Section when performing following Work:.1 Removal of lead based paint from bridge by scraping or sanding using non-powered hand tools..2 Manual demolition of lead-painted bridge components by striking wall with sledgehammer or similar tool. 1.2 SECTION INCLUDES.1 Requirements and procedures for abatement of lead based paints. 1.3 RELATED SECTIONS.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Lead-based paint abatement Maximum Precautions ( ) 1.4 DEFINITIONS 1.5 REFERENCES.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Health Canada.1 Workplace Hazardous Materials Information System (WHMIS), Material Safety Data Sheets (MSDS)..3 Human Resources and Social Development Canada (HRSDC).1 Canada Labour Code Part II, - SOR Occupational Health and Safety Regulations..4 Transport Canada (TC).1 Transportation of Dangerous Goods Act, 1992 (TDGA). 1.6 DEFINITIONS.1 HEPA vacuum: High Efficiency Particulate Air filtered vacuum equipment with filter system capable of collecting and retaining fibres greater than 0.3 microns in any direction at 99.97% efficiency..2 Authorized Visitors: Owner, Departmental Representative, Engineer, Consultant or designated representatives and representatives of regulatory agencies..3 Occupied Area: work site that is outside Work Area..4 Sprayer: garden reservoir type sprayer or airless spray equipment capable of producing mist or fine spray. Must be appropriate capacity for scope of work.

15 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 2.5 Airlock: ingress or egress system, without permitting air movement between contaminated area and uncontaminated area. Consisting of two curtained doorways at least 2 m apart..6 Curtained doorway: arrangement of closures to allow ingress and egress from one room to another. Typically constructed as follows:.1 Place two overlapping polyethylene sheets over existing or temporarily framed doorway, securing each along top of doorway, securing vertical edge of one sheet along one vertical side of doorway, and secure other sheet along opposite vertical side of doorway..2 Reinforce free edges of polyethylene with duct tape and add weight to bottom edge to ensure proper closing..3 Overlap each polyethylene sheet at openings 1.5 m on each side..7 Action level: employee exposure, without regard to usage of respirators, to an airborne concentration of lead of 50 micrograms per cubic meter of air calculated as 8 hour timeweighted average (TWA). Intermediate precautions for lead abatement are based on airborne lead concentrations greater than 0.05 milligrams per cubic meter of air within Work Area..8 Competent person: individuals capable of identifying existing lead hazards in workplace and taking corrective measures to eliminate them..9 Lead in Dust: wipe sampling on vertical and/or horizontal surfaces, dust and debris is considered to be lead contaminated if it contains more than 40 micrograms of lead in dust per square foot. 1.7 SUBMITTALS.1 Provide proof satisfactory to Consultant that suitable arrangements have been made to dispose of lead based paint waste in accordance with requirements of authority having jurisdiction..2 Quality Control:.1 Provide proof satisfactory to Consultant that employees have had instruction on hazards of lead exposure, respirator use, dress, entry and exit from Work Area, and aspects of work procedures and protective measures..2 Provide proof that supervisory personnel have attended lead abatement course, of not less than two days duration, approved by Consultant. Minimum of one supervisor for every ten workers. 1.8 QUALITY ASSURANCE.1 Regulatory Requirements: comply with Provincial and local requirements pertaining to lead paint, in case of conflict among those requirements or with these specifications more stringent requirement applies. Comply with regulations in effect at time work is performed..2 Health and Safety:.1 Do construction occupational health and safety in accordance with the Ontario Occupational Health and Safety Act..2 Safety Requirements: worker and visitor protection..1 Protective equipment and clothing to be worn by workers and visitors in Work Area includes:

16 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 3.1 NIOSH approved half-face respirator and equipped with P-100 filter cartridges. Provide sufficient filters so workers can install new filters following disposal of used filters and before re-entering contaminated areas..2 Disposable type protective clothing that does not readily retain or permit skin contamination, consisting of full body covering including head covering with snug fitting cuffs at wrists, ankles, and neck..2 Requirements for workers:.1 Remove street clothes in clean change room and put on respirator with new filters or reusable filters, clean coveralls and head covers before entering Work Area. Store street clothes, uncontaminated footwear, towels, and similar uncontaminated articles in clean change room..2 Remove gross contamination from clothing before leaving work area. Place contaminated work suits in receptacles for disposal with other lead - contaminated materials. Leave reusable items except respirator in Equipment and Access Room. When not in use in Work Area, store work footwear in Equipment and Access Room. Upon completion of lead abatement, dispose of footwear as contaminated waste or clean thoroughly inside and out using soap and water before removing from Work Area or from Equipment and Access Room..3 Enter unloading room from outside dressed in clean coveralls to remove waste containers and equipment from Holding Room of Container and Equipment Decontamination Enclosure system. Workers not to use this system as means to leave or enter work area..3 Eating, drinking, chewing, and smoking are not permitted in Work Area..4 Ensure workers are fully protected with respirators and protective clothing during preparation of system of enclosures prior to commencing actual lead abatement..5 Ensure workers wash hands and face when leaving Work Area..6 Provide and post in Clean Change Room and in Equipment and Access Room the procedures described in this Section, in both official languages..7 Ensure no person required to enter Work Area has facial hair that affects seal between respirator and face..8 Visitor Protection: 1.9 WASTE MANAGEMENT AND DISPOSAL.1 Provide protective clothing and approved respirators to Authorized Visitors to Work Areas..2 Instruct Authorized Visitors in use of protective clothing, respirators and procedures..3 Instruct Authorized Visitors in proper procedures to be followed in entering into and exiting from Work Area..1 Disposal of lead waste generated by removal activities must comply with Provincial regulations. Dispose of lead waste in sealed double thickness 6 ml bags or leak proof drums. Label containers with appropriate warning labels.

17 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page EXISTING CONDITIONS.1 Reports and information pertaining to lead based paint to be handled, removed, or otherwise disturbed and disposed of during this Project are available upon request SCHEDULING.1 Provide Consultant copy of notifications prior to start of Work..2 Hours of Work: perform work involving lead removal during normal working hours. Part 2 Products 2.1 MATERIALS.1 Polyethylene: 0.15mm unless otherwise specified; in sheet size to minimize joints..2 FR polyethylene: 0.15mm woven fibre reinforced fabric bonded both sides with polyethylene..3 Tape: fibreglass - reinforced duct tape suitable for sealing polyethylene under dry conditions and wet conditions using amended water..4 Slow - drying sealer: non-staining, clear, water - dispersible type that remains tacky on surface for at least 8 hours and designed for trapping residual lead paint residue. Part 3 Execution 3.1 SUPERVISION.1 Approved Supervisor must remain within Work Area during disturbance, removal, or other handling of lead based paints. 3.2 PREPARATION.1 Work Area:.1 Clean work areas using HEPA vacuum. If not practicable, use wet cleaning method. Do not use methods that raise dust, such as dry sweeping, or vacuuming using other than HEPA vacuum..2 Cover ground surfaces in work area with two layers of polyethylene drop sheets..3 Build airlocks at entrances and exits from work areas to ensure work areas are always closed off by one curtained doorway when workers enter or exit..4 At point of access to work areas install warning signs in both official languages in upper case "Helvetica Medium" letters reading as follows where number in parentheses indicates font size to be used:.1 CAUTION LEAD HAZARD AREA (25 mm)..2 NO UNAUTHORIZED ENTRY (19 mm)..3 WEAR ASSIGNED PROTECTIVE EQUIPMENT AND RESPIRATOR (19 mm).

18 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 5.4 BREATHING LEAD CONTAMINATED DUST CAUSES SERIOUS BODILY HARM (7 mm)..5 Where water application is required for wetting lead containing materials, provide temporary water supply by use of appropriately sized hoses for application of water as required..2 Worker Decontamination Enclosure System:.1 Worker Decontamination Enclosure System includes Equipment and Access Room and Clean Room, as follows:.1 Equipment and Access Room: construct between exit and work areas, with two curtained doorways, one to the rest of suite, and one to work area. Install waste receptor and storage facilities for workers' shoes and protective clothing to be re-worn in work areas. Build large enough to accommodate specified facilities, equipment needed, and at least one worker allowing sufficient space to change comfortably..2 Clean Room: construct with curtained doorway to outside of enclosures. Provide lockers or hangers and hooks for workers' street clothes and personal belongings. Provide storage for clean protective clothing and respiratory equipment. Install mirror to permit workers to fit respiratory equipment properly..3 Separation of Work Areas from Occupied Areas.1 Barriers between Work Area and occupied area to be constructed as follows:.1 Construct barrier fence around the lead removal work area. Provide sufficient room for equipment and workers based on the terrain. Cover with polyethylene sheeting and seal with duct tape..4 Maintenance of Enclosures:.1 Maintain enclosures in clean condition..2 Ensure barriers and polyethylene linings are effectively sealed and taped. Repair damaged barriers and remedy defects immediately..3 Visually inspect enclosures at beginning of each work day. 3.3 LEAD - BASED PAINT ABATEMENT.1 Removal of lead based paint to be performed by scraping or sanding using non-powered hand tools, or manual demolition bridge components by striking a wall with sledgehammer or similar tool..2 Remove lead based paint in small sections and pack as it is being removed in sealable 0.15mm plastic bags and place in labelled containers for transport..3 Seal filled containers. Clean external surfaces thoroughly by wet sponging. Remove from immediate working area to Staging Area. Clean external surfaces thoroughly again by wet sponging before moving containers to decontamination Washroom. Wash containers thoroughly in decontamination Washroom, and store in Holding Room pending removal to Unloading Room and outside. Ensure containers are removed from Holding Room by workers who have entered from uncontaminated areas dressed in clean coveralls.

19 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 6.4 After completion of stripping work, wire brush and wet sponge surface from which lead based paint has been removed to remove visible material. During this work keep surfaces wet..5 After wire brushing and wet sponging to remove visible lead based paint, and after encapsulating lead containing material impossible to remove, wet clean work area including equipment and access room, and equipment used in process..6 Wet clean work area and equipment and access room. 3.4 INSPECTION.1 Perform inspection to confirm compliance with specification and governing authority requirements. Deviations from these requirements not approved in writing by Consultant will result in work stoppage, at no cost to Owner..2 Consultant will inspect work for:.1 Adherence to specific procedures and materials..2 Final cleanliness and completion..3 No additional costs will be allowed by Contractor for additional labour or materials required to provide specified performance level..3 When lead dust leakage from Work Area occurs Consultant may order Work shutdown..1 No additional costs will be allowed by Contractor for additional labour or materials required to provide specified performance level. 3.5 FINAL CLEANUP.1 Following specified cleaning procedures, proceed with final cleanup..2 Remove polyethylene sheet by rolling it away from walls to centre of work area. Vacuum visible lead containing particles observed during cleanup, immediately, using HEPA vacuum equipment..3 Place polyethylene seals, tape, cleaning material, clothing, and other contaminated waste in plastic bags and sealed labelled waste containers for transport..4 Clean-up Work Areas, Equipment and Access Room, and other contaminated enclosures..5 Clean-up sealed waste containers and equipment used in Work and remove from work areas, via Container and Equipment Decontamination Enclosure System, at appropriate time in cleaning sequence..6 Conduct final check to ensure no dust or debris remains on surfaces as result of dismantling operations. 3.6 RE-ESTABLISHMENT OF OBJECTS AND SYSTEMS.1 Repair or replace objects damaged in course of work to their original state or better, as directed by Consultant.

20 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - INTERMEDIATE PRECAUTIONS Page 7 END OF SECTION

21 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page 1 Part 1 General 1.1 SUMMARY.1 Comply with requirements of this Section when performing following Work:.1 Abrasive blasting of lead based paint on bridge. 1.2 RELATED SECTIONS.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Lead-based paint abatement Intermediate Precautions ( ) 1.3 REFERENCES.1 Ontario Ministry of Labour Guideline Lead on Construction Projects.2 Health Canada.1 Workplace Hazardous Materials Information System (WHMIS), Material Safety Data Sheets (MSDS)..3 Human Resources and Social Development Canada (HRSDC).1 Canada Labour Code Part II, - SOR Occupational Health and Safety Regulations..4 Transport Canada (TC).1 Transportation of Dangerous Goods Act, 1992 (TDGA). 1.4 DEFINITIONS.1 HEPA vacuum: High Efficiency Particulate Air filtered vacuum equipment with a filter system capable of collecting and retaining fibres greater than 0.3 microns in any direction at 99.97% efficiency..2 Authorized Visitors: Owner, Departmental Representative, Engineer, Consultant, or designated representatives of regulatory agencies..3 Occupied Area: area of building or work site outside Work Area..4 Dioctyl Phthalate (DOP) Test: testing method used to evaluate particle penetration and air flow resistance properties of filtration materials - HEPA filter leak test..5 Sprayer: garden reservoir type sprayer or airless spray equipment capable of producing mist or fine spray. Appropriate capacity for scope of work..6 Airlock: ingress or egress system without permitting air movement between contaminated area and uncontaminated area. Consisting of two curtained doorways at least 2 m apart.

22 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page 2.7 Curtained doorway: arrangement of closures to allow ingress and egress from one room to another while permitting minimal air movement between rooms, typically constructed as follows:.1 Place two overlapping sheets of polyethylene over existing or temporarily framed doorway, secure each along top of doorway, secure vertical edge of one sheet along one vertical side of doorway, and secure vertical edge of other sheet along opposite vertical side of doorway..2 Reinforce free edges of polyethylene with duct tape and add weight to bottom edge to ensure proper closing..3 Overlap each polyethylene sheet at openings 1.5 m on each side..8 Action level: employee exposure, without regard to usage of respirators, to an airborne concentration of lead of 50 micrograms per cubic metre of air calculated as an 8-hour timeweighted average (TWA). Maximum precautions for lead abatement are based on airborne lead concentrations greater than 1.25 milligrams per cubic meter of air within Work Area..9 Competent person: Individuals capable of identifying existing lead hazards in workplace and taking corrective measures to eliminate them..10 Lead in Dust: wipe sampling on the vertical and/or horizontal surfaces, dust and debris is considered to be lead contaminated if it contains more than 40 micrograms of lead in dust per square foot..11 Negative Air Pressure Machine: extracts air directly from work area and filters extracted air through a HEPA filter, discharge air to exterior of building. 1.5 SUBMITTALS.1 Maintain pressure differential of 5 to 7 Pa relative to adjacent areas outside of work areas. Machine to be equipped with instrument to continuously monitor pressure differentials..1 Provide proof satisfactory to Consultant that suitable arrangements have been made to dispose of lead based paint waste in accordance with requirements of authority having jurisdiction..2 Quality Control:.1 Provide proof satisfactory to Consultant that employees have had instruction on hazards of lead exposure, respirator use, dress, entry and exit from Work Area, and aspects of work procedures and protective measures..2 Provide proof that supervisory personnel have attended lead abatement course, of not less than two days duration, approved by Consultant. Minimum of one supervisor for every ten workers. 1.6 QUALITY ASSURANCE.1 Regulatory Requirements: comply with Federal, Provincial/Territorial and local requirements pertaining to lead, in case of conflict among those requirements or with these specifications the more stringent requirement applies. Comply with regulations in effect at time work is performed..2 Health and Safety:

23 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page 3.1 Do construction occupational health and safety in accordance with the Ontario Occupational Health and Safety Act..2 Safety Requirements: worker and visitor protection..1 Protective equipment and clothing to be worn by workers while in Lead Work Area includes:.1 Abrasive blasting of lead paint: NIOSH approved and equipped with filter cartridges with assigned protection factor of Suitable for type of lead and level of lead dust exposure in Lead Work Area. Respirator to be equivalent Type CE abrasive blast supplied air respirator operated in a pressure demand or positive pressure mode with a tight-fitting full-face-piece. Compressed air used to supply supplied air respirators to meet breathing air purity requirements of CAN/CSA-Z Where an oil-lubricated compressor is used to supply breathing air, a continuous carbon monoxide monitor/alarm to be provided..2 Disposable protective clothing that does not readily retain or permit skin contamination, consisting of full body covering including head covering with snug fitting cuffs at wrists, ankles, and neck..2 Requirements for workers:.1 Remove street clothes in clean change room and put on respirator with new filters or reusable filters, clean coveralls and head covers before entering Equipment and Access Rooms or Work Area. Store street clothes, uncontaminated footwear, towels, and similar uncontaminated articles in clean change room..2 Remove gross contamination from clothing before leaving work area. Place contaminated work suits in receptacles for disposal with other lead contaminated materials. Leave reusable items except respirator in Equipment and Access Room. When not in use in work area, store work footwear in Equipment and Access Room. Upon completion of lead abatement, dispose of footwear as contaminated waste or clean thoroughly inside and out using soap and water before removing from work area or from Equipment and Access Room..3 Enter unloading room from outside dressed in clean coveralls to remove waste containers and equipment from Holding Room of Container and Equipment Decontamination Enclosure system. Workers not use this system as means to leave or enter Work Area..3 Eating, drinking, chewing, and smoking are not permitted in Work Area..4 Ensure workers are fully protected with respirators and protective clothing during preparation of system of enclosures prior to commencing actual lead abatement..5 Ensure workers wash hands and face when leaving Lead Work Area..6 Provide and post in Clean Change Room and in Equipment and Access Room the procedures described in this Section, in both official languages..7 Ensure no person required to enter Work Area has facial hair that affects seal between respirator and face..8 Visitor Protection:

24 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page WASTE MANAGEMENT AND DISPOSAL.1 Provide protective clothing and approved respirators to Authorized Visitors to work areas..2 Instruct Authorized Visitors in use of protective clothing, respirators and procedures..3 Instruct Authorized Visitors in proper procedures to be followed in entering into and exiting from Work Area..1 Disposal of lead waste generated by removal activities must comply with Provincial regulations. Dispose of lead waste in sealed double thickness 6 ml bags or leak proof drums. Label containers with appropriate warning labels. 1.8 EXISTING CONDITIONS.1 Reports and information pertaining to lead based paint to be handled, removed, or otherwise disturbed and disposed of during this Project are available upon request. Part 2 Products 2.1 MATERIALS.1 Polyethylene: 0.15mm unless otherwise specified; in sheet size to minimize joints..2 FR polyethylene: 0.15mm woven fibre reinforced fabric bonded both sides with polyethylene..3 Tape: fibreglass - reinforced duct tape suitable for sealing polyethylene under dry conditions and wet conditions using amended water..4 Slow - drying sealer: non-staining, clear, water - dispersible type that remains tacky on surface for at least 8 hours and designed for trapping residual lead paint residue. Part 3 Execution 3.1 SUPERVISION.1 Approved Supervisor must remain within Work Area during disturbance, removal, or handling of lead based paints. 3.2 PREPARATION.1 Work Area:.1 Clean work areas using HEPA vacuum. If not practicable, use wet cleaning method. Do not use methods that raise dust, such as dry sweeping, or vacuuming using other than HEPA vacuum..2 Install negative pressure machine system and operate continuously from installation of polyethylene sheeting until completion of final cleanup. Provide automatic continuous monitoring and recording instrument of pressure difference..3 Cover ground surfaces in work area with two layers of polyethylene drop sheets.

25 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page 5.4 Build airlocks at entrances and exits from work areas to ensure work areas are always closed off by one curtained doorway when workers enter or exit..5 At point of access to work areas install warning signs in both official languages in upper case "Helvetica Medium" letters reading as follows where number in parentheses indicates font size to be used:.1 CAUTION LEAD HAZARD AREA (25 mm)..2 NO UNAUTHORIZED ENTRY (19 mm).3 WEAR ASSIGNED PROTECTIVE EQUIPMENT AND RESPIRATOR (19 mm)..4 BREATHING LEAD CONTAMINATED DUST CAUSES SERIOUS BODILY HARM (7 mm)..6 Where water application is required for wetting lead containing materials, provide temporary water supply by use of appropriately sized hoses for application of water as required..2 Worker Decontamination Enclosure System:.1 Worker Decontamination Enclosure System includes Equipment and Access Room and Clean Room, as follows:.1 Equipment and Access Room: construct between exit and work areas, with two curtained doorways, one to the rest of the suite, and one to work area. Install waste receptor and storage facilities for workers' shoes and protective clothing to be re-worn in work areas. Build large enough to accommodate specified facilities, equipment needed, and at least one worker allowing sufficient space to change comfortably..2 Clean Room: construct with curtained doorway to outside of enclosures. Provide lockers or hangers and hooks for workers' street clothes and personal belongings. Provide storage for clean protective clothing and respiratory equipment. Install mirror to permit workers to fit respiratory equipment properly..3 Construction of Decontamination Enclosures:.1 Construct framing for enclosures. Line enclosure with polyethylene sheeting and seal with tape, apply two layers of polyethylene on ground..2 Construct curtain doorways between enclosures so when people move through or waste containers and equipment are moved through doorway, one of two closure comprising doorway always remains closed..3 Shower room in decontamination facility to be provided with the following:.1 Hot and cold water or water of constant temperature not less than 40 degrees Celsius or more than 50 degrees Celsius..2 Individual controls inside to regulate water flow and temperature..4 Prior to each shift in which a decontamination facility is being used, a competent person should inspect the facility to ensure that there are no defects that would allow lead-containing dust to escape. Defects should be repaired before the facility is used. The decontamination facility should be maintained in a clean and sanitary condition..4 Separation of Work Areas from Occupied Areas:.1 Barriers between Work Area and occupied area to be constructed as follows:

26 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page 6.1 Construct floor to ceiling lumber stud framing, cover all walls, floor and ceiling with polyethylene sheeting and seal with duct tape..5 Maintenance of Enclosures:.1 Maintain enclosures in tidy condition..2 Ensure barriers and polyethylene linings are effectively sealed and taped. Repair damaged barriers and remedy defects immediately..3 Visually inspect enclosures at beginning of each working day. 3.3 LEAD - BASED PAINT ABATEMENT.1 Removal of lead based paint to be performed using abrasive blasting techniques..2 Remove lead based paint in small sections and pack as it is being removed in sealable 0.15 mm plastic bags and place in labelled containers for transport..3 Wet method to be used to reduce dust generation. Examples of wet methods include wetting surfaces, wet scraping, and wet shovelling. Wet method not be used if it creates a hazard or cause damage to equipment or to project..4 Seal filled containers. Clean external surfaces thoroughly by wet sponging. Remove immediate from working area to staging area. Clean external surfaces thoroughly again by wet sponging before moving containers to decontamination Washroom. Wash containers thoroughly in decontamination Washroom, and store in Holding Room pending removal to Unloading Room and outside. Ensure containers are removed from Holding Room by workers who have entered from uncontaminated areas dressed in clean coveralls..5 After completion of stripping work, wire brush and wet sponge surface to remove visible material. During this work keep surfaces wet. After wire brushing and wet sponging, wet clean and HEPA vacuum entire work area including Equipment and Access Room. Compressed air or dry sweeping not be used to clean up lead-containing dust or waste..6 Wet clean work area and equipment and access room. 3.4 INSPECTION.1 Perform inspection to confirm compliance with specification and governing authority requirements. Deviations from requirements not been approved in writing by Consultant will result in Work shutdown, at no cost to Owner..2 Consultant will inspect work for:.1 Adherence to specific procedures and materials..2 Final cleanliness and completion..3 No additional costs will be allowed for additional labour or materials required to provide specified performance level..3 When lead dust leakage from Work Area occurs Consultant will order Work shutdown..1 No additional costs will be allowed by Contractor for additional labour or materials required to provide specified performance level.

27 Mooney s Bay Section LEAD - BASED PAINT ABATEMENT - MAXIMUM PRECAUTIONS Page FINAL CLEANUP.1 Following specified cleaning procedures proceed with final cleanup..2 Remove polyethylene sheet by rolling it away from walls to centre of work area. Vacuum visible lead containing particles observed during cleanup, immediately, using HEPA vacuum..3 Place polyethylene sheets, tape, cleaning material, clothing, and contaminated waste in plastic bags and sealed labelled waste containers for transport..4 Clean up Work areas, Equipment and Access Room, and other contaminated enclosures..5 Remove sealed waste containers and equipment used in Work and remove from work areas at appropriate time in cleaning sequence..6 Conduct final check to ensure no dust or debris remain on surfaces as result of dismantling operations. 3.6 RE-ESTABLISHMENT OF OBJECTS AND SYSTEMS.1 Repair or replace objects damaged in course of work to their original state or better, as directed by Consultant. END OF SECTION

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