Specifications.docx

ATTACHMENT 2

6973GH-22-R-00035

TECHNICAL SPECIFICATIONS

for

ASBESTOS ABATEMENT

at the

MIKE MONRONEY AERONAUTICAL CENTER OKLAHOMA CITY, OKLAHOMA

TABLE OF CONTENTS:

Section 01513 – Temporary Pressure Differential and Air Circulation System Section 01526 – Temporary Enclosures Section 01562 - Respiratory Protection Section 01563 – Decontamination Units Section 01701 - Project Closeout - Asbestos Abatement Section 01711 - Project Decontamination Section 01712 - Cleaning And Decontamination Procedures Section 01714 - Work Area Clearance Section 02061 - Building Demolition-Asbestos Abatement Section 02063 - Demolition Of Asbestos Contaminated Materials Section 02081 - Removal Of Asbestos-Containing Materials Section 02082 - Removal Of Asbestos-Contaminated Soil Section 02084 - Disposal Of Asbestos-Containing Waste Material Section 09251 - Gypsum Drywall - Asbestos Enclosures Section 09805 - Encapsulation Of Asbestos-Containing Materials Section 15254 - Repair Of Insulation And Lagging

SECTION 01513 - TEMPORARY PRESSURE DIFFERENTIAL AND AIR CIRCULATION SYSTEM

PART 1 - GENERAL

RELATED DOCUMENTS:

Drawings and general provisions of Contract Documents, including, but not limited to other Division-1 Specification Sections, apply to this Section.

PART 2 - PRODUCTS

HEPA FILTERED FAN UNITS:

General: Supply the required number of HEPA filtered fan units to the site in accordance with these specifications. Use units that meet the following requirements.

Cabinet: Constructed of durable materials able to withstand damage from rough handling and transportation. The width of the cabinet should be less than 30 inches to fit through standard-size doorways. Provide units whose cabinets are:

Factory-sealed to prevent asbestos-containing dust from being released during use, transport, or maintenance

Arranged to provide access to and replacement of all air filters from intake end

Fans: Rate capacity of fan according to usable air-moving capacity under actual operating conditions.

HEPA Filters: Provide units whose final filter is the HEPA type with the filter media (folded into closely pleated panels) completely sealed on all edges with a structurally rigid frame.

Provide units with a continuous rubber gasket located between the filter and the filter housing to form a tight seal.

Provide HEPA filters that are individually tested and certified by the manufacturer to have an efficiency of not less than 99.97 percent when challenged with 0.3-micron dioctylphthalate (DOP) particles when tested in accordance with Military Standard Number 282 and Army Instruction Manual 136-300-175A. Provide filters that bear a UL586 label to indicate ability to perform under specified conditions.

Provide filters that are marked with: the name of the manufacturer, serial number, airflow rating, efficiency and resistance, and the direction of test airflow.

Prefilters, which protect the final filter by removing the larger particles, are required to prolong the operating life of the HEPA filter. Two stages of prefiltration are required. Provide units with the following prefilters:

First-stage prefilter: low-efficiency type (e.g., for particles 100 micron and larger)

Second-stage (or intermediate) filter: medium efficiency (e.g., effective for particles down to 5 microns)

Provide units with prefilters and intermediate filters installed either on or in the intake grid of the unit and held in place with special housings or clamps.

Instrumentation: Provide units equipped with:

Magnehelic gauge or manometer to measure the pressure drop across filters and indicate when filters have become loaded and need to be changed

Elapsed time meter to show the total accumulated hours of operation

Safety and Warning Devices: Provide units with the following safety and warning devices:

Electrical (or mechanical) lockout to prevent fan from operating without a HEPA filter

Automatic shutdown system to stop fan in the event of a rupture in the HEPA filter or blocked air discharge

Warning lights to indicate normal operation (green), too high a pressure drop across the filters (i.e., filter overloading) (yellow), and too low of a pressure drop (i.e., rupture in HEPA filter or obstructed discharge) (red). Audible alarm if unit shuts down due to operation of safety systems

Electrical Components: Provide units with electrical components approved by the National Electrical Manufacturers Association (NEMA) and Underwriter's Laboratories (UL). Each unit is to be equipped with overload protection sized for the equipment. The motor, fan, fan housing, and cabinet are to be grounded.

PART 3 - EXECUTION

PRESSURE DIFFERENTIAL ISOLATION

Isolate the Work Area from all adjacent areas or systems of the building with a Pressure Differential that will cause a movement of air from outside to inside at any breach in the physical isolation of the Work Area.

Relative Pressure in Work Area: Continuously maintain the work area at an air pressure that is lower than that in any surrounding space in the building, or at any location in the immediate proximity outside of the building envelope. This pressure differential when measured across any physical or critical barrier must equal or exceed a static pressure of:

0.01 inches of water.

Accomplish the pressure differential by exhausting a sufficient number of HEPA filtered fan units from the work area. The number of units required will depend on machine characteristics, the seal at barriers, and required air circulation. The number of units will increase with increased make-up air or leaks into the Work Area. Determine the number of units required for pressure isolation by the following procedure:

Establish required air circulation in the work area, personnel and equipment decontamination units.

Establish isolation by increased pressure in adjacent areas or as part of seals where required.

Exhaust a sufficient number of units from the work area to develop the required pressure differential.

The required number of units is the number determined above plus one additional unit.

Vent HEPA filtered fan units to outside of building unless authorized by Environmental Consultant.

· Mount units to exhaust directly or through disposable ductwork.

· Use only new ductwork except for sheet metal connections and elbows.

· Use ductwork and fittings of same diameter or larger than discharge connection on fan unit.

· Use inflatable, disposable plastic ductwork in lengths not greater than 50 feet.

· Use spiral wire-reinforced flex duct in lengths not greater than 100 feet.

· Arrange exhaust as required to inflate duct to a rigidity sufficient to prevent flapping.

· If direction of discharge from fan unit is not aligned with duct use sheet metal elbow to change direction. Use six feet of spiral wire reinforced flex duct after direction change.

AIR CIRCULATION IN THE WORK AREA:

Air Circulation: For purposes of this section air circulation refers to either the introduction of outside air to the Work Area or the circulation and cleaning of air within the Work Area.

Air circulation in the Work Area is a minimum requirement intended to help maintain airborne fiber counts at a level that does not significantly challenge the Work Area isolation measures.

The Contractor may also use this air circulation as part of the engineering controls in his worker protection program.

Determining the Air circulation Requirements: Provide a fully operational air circulation system supplying a minimum of the following air circulation rate:

4 air changes per hour

Determine Number of Units needed to achieve required air circulation according to the following procedure:

Determine the volume in cubic feet of the Work Area by multiplying floor area by ceiling height. Determine total air circulation requirement in cubic feet per minute (CFM) for the Work Area by multiplying this volume by the air change rate and dividing by 60.

Air Circulation Required in Cubic Feet of Air per Minute (CFM) = Volume of Work Area (cu. ft.) X Number of air changes per hour 60 (minutes per hour)

Divide the air circulation requirement (CFM) above by capacity of HEPA filtered fan unit(s) used. Capacity of a unit for purposes of this section is the capacity in cubic feet per minute with fully loaded filters (pressure differential which causes loaded filter warning light to come on) in the machine's labeled operating characteristics.

Number of Units Needed =

Air circulation Requirement (CFM) Capacity of Unit with Loaded Filters (CFM)

Add one (1) additional unit as a backup in case of equipment failure or machine shutdown for filter changing.

EXHAUST SYSTEM:

Isolation and air circulation in the Work Area are to be accomplished by an exhaust system as described below.

Exhaust all units from the Work Area to meet air circulation requirements of this section.

Location of HEPA Filtered Fan Units:

Locate fan unit(s) so that makeup air enters Work Area primarily through the decontamination units and traverses Work Area as much as possible. This may be accomplished by positioning the HEPA filtered fan unit(s) at a maximum distance from the worker access opening or other makeup air sources.

Place End of Unit and intake duct or its exhaust duct through an opening in the plastic barrier or wall covering. Seal plastic around the unit or duct with tape.

Vent to Outside of Building, unless authorized by the Environmental Consultant. The Building must remain secure at all times.

Supplemental Makeup Air Inlets: Provide where required for proper air flow through the Work Area in locations accepted by the Environmental Consultant by making openings in the plastic sheeting that allow air from outside the building into the Work Area. Locate auxiliary makeup air inlets as far as possible from the fan unit(s) (e.g., on an opposite wall), off the floor (preferably near the ceiling), and away from barriers that separate the Work Area from occupied clean areas. Cover with flaps to reseal automatically if the pressure differential system should shut down for any reason. Spray flap and around opening with spray adhesive so that if flap closes, meeting surfaces are both covered with adhesive. Use adhesive that forms contact bond when dry. Weight the bottom of the flaps.

AIR CIRCULATION IN DECONTAMINATION UNITS:

Pressure Differential Isolation: Continuously maintain the pressure differential required for the Work Area in the:

Personnel Decontamination Unit: across the Shower Room with the Equipment Room at a lower pressure than the Clean room.

Equipment Decontamination Unit: Across the Holding Room with the Wash Room at a lower pressure than the Clean Room.

Air Circulation: Continuously maintain air circulation in Decontamination Units at same level as required for Work Area.

Air Movement: Arrange air circulation through the Personnel Decontamination Unit so that it produces a movement of air from the Clean Room through the Shower Room into the Equipment Room.

USE OF THE PRESSURE DIFFERENTIAL AND AIR CIRCULATION SYSTEM:

General: Each unit shall be serviced by a dedicated minimum 115V-20A circuit with ground fault circuit interrupter (GFCI) supplied from temporary power supply installed under requirements of Section 01503 "Temporary Facilities."

Testing the System: Test pressure differential system before any asbestos-containing material is wetted or removed. After the Work Area has been prepared, the decontamination facility set up, and the fan unit(s) installed, start the unit(s) (one at a time). Demonstrate operation and testing of pressure differential system to Environmental Consultant.

Demonstrate Condition of Equipment for each HEPA filtered fan unit and pressure differential monitoring equipment including proper operation of the following:

· Squareness of HEPA Filter

· Condition of Seals

· Proper operation of all lights

· Proper operation of automatic shut down if exhaust is blocked

· Proper operation of alarms

Demonstrate Operation of the pressure differential system to the Environmental Consultant. This demonstration will include, but not be limited to, the following:

· Plastic barriers and sheeting move lightly in toward Work Area

· Curtain of decontamination units move lightly in toward Work Area

· There is a noticeable movement of air through the Decontamination Unit.

· Use smoke tube to demonstrate air movement from Clean Room through Shower Room to Equipment Room.

· Use smoke tubes to demonstrate a definite motion of air across all areas in which Work is to be performed.

· Use a continuous read differential pressure meter or manometer to demonstrate the required pressure differential. This is mandatory for all containments.

If the pressure differential system is not sufficient, as determined by the Environmental Consultant, additional machines may be required at no additional cost to the Owner.

Use of System During Abatement Operations:

Start fan units before beginning Work (before any asbestos-containing material is disturbed). After abatement Work has begun, run units continuously to maintain a constant pressure differential and air circulation until decontamination of the Work Area is complete. Do not turn off units at the end of the Work shift or when abatement operations temporarily stop.

Do not shut down air pressure differential system during encapsulating procedures, unless authorized by the Environmental Consultant in writing. Supply sufficient pre-filters to allow frequent changes.

Start abatement Work at a location farthest from the fan units and proceed toward them. If an electric power failure occurs, immediately stop all abatement Work and do not resume until power is restored and fan units are operating again.

At completion of abatement Work, allow fan units to run as specified under section 01711, to remove airborne fibers that may have been generated during abatement Work and cleanup and to purge the Work Area with clean makeup air.

Dismantling the System:

When a final inspection and the results of final air tests indicate that the area has been decontaminated, fan units may be removed from the Work Area. Before removal from the Work Area, remove and properly dispose of pre-filter, decontaminate exterior of machine and seal intake to the machine with 6-mil polyethylene to prevent asbestos contamination from the filters.

Royalties, Patents and Licensing:

The Contractor shall pay all royalties and license fees. The Contractor shall protect, defend, indemnify, and save harmless the Owner or Environmental Consultant from all liabilities, judgements, costs, damages, and expenses which may in any way come against the Owner or Environmental Consultant by reason of the use of any material, machinery, devices, equipment or processes furnished or used in the performance of the Work for which patents or licensing agreements exist or by reason of the use of designs furnished by the Contractor for which patents or licensing agreements exist.

The Contractor is hereby notified that certain procedures and systems that the Contractor may choose to employ to perform certain requirements specified herein, specifically the use of a particular negative air system in conjunction with HEPA filtered exhaust equipment, are registered, patented processes. The Contractor shall be responsible for all royalties and license fees in relation to such patents and shall hold harmless and indemnify the Owner and Environmental Consultant from and against all claims, losses, damages and expenses, including reasonable attorney's fees, arising out of any failure on the part of the Contractor to properly comply with patent requirements.

END OF SECTION - 01513

PRESSURE

DIFFERENTIAL

SYSTEM

01513

SECTION 01526 - TEMPORARY ENCLOSURES

PART 1 - GENERAL

RELATED DOCUMENTS:

Drawings and general provisions of Contract Documents, including, but not limited to other Division-1 Specification Sections, apply to this Section.

All containments are to be constructed in accordance with AHERA, Title 10 of the Missouri Code of State Regulations and these specifications unless a waiver is requested and granted by the proper authorities and the environmental consultant. The Environmental Consultant prior to submittal to the proper authorities shall review all waivers.

PART 2 - PRODUCTS

SHEET PLASTIC:

Polyethylene Sheet: A single polyethylene film, 6 mil thick, in the largest sheet size possible to minimize seams, clear, frosted, or black as indicated.

MISCELLANEOUS MATERIALS:

Duct Tape: Provide duct tape in 2" or 3" widths as indicated, with an adhesive, which is formulated to stick aggressively to sheet polyethylene.

Spray Cement: Provide spray adhesive in aerosol cans, which is specifically formulated to stick tenaciously to sheet polyethylene.

Fire Rated Gypsum Board: Provide fire rated gypsum board when building a hard barrier between the work area and occupied areas.

PART 3 - EXECUTION

SEQUENCE OF WORK:

Carry out Work of this section sequentially. Complete each activity before proceeding to the next.

GENERAL:

Work Area: The location where asbestos-abatement Work occurs. It is a variable of the extent of Work of the Contract. It may be a portion of a room, a single room, a complex of rooms, or an exterior space. A "Work Area" is considered contaminated during the Work and must be isolated from the balance of the building and decontaminated at the completion of the asbestos-control Work.

Completely isolate the Work Area from other parts of the building on the outside so as to prevent asbestos-containing dust or debris from passing beyond the isolated area. Should the area beyond the Work Area(s) become contaminated with asbestos-containing dust or debris as a consequence of the Work, clean those areas in accordance with the procedures indicated in Section 01711. Perform all such required cleaning or decontamination at no additional cost to owner.

Place all tools, scaffolding, staging, etc. necessary for the Work in the area to be isolated prior to completion of Work Area isolation.

Disable ventilating systems or any other system bringing air into or out of the Work Area. Disable system by disconnecting wires, removing circuit breakers, by lockable switch or other positive means that will prevent accidental premature restarting of equipment.

Power to Work Area:

Lockout power to the Work Area by switching off all breakers serving power or lighting circuits in Work Area. Label breakers with tape over breaker with notation "DANGER circuit being worked on". Lock panel and have all keys under control of Contractor's Superintendent.

Inspection Windows: Install inspection windows as required. Install windows in locations where the largest amount of work can be viewed. Each inspection window is to have an 18" X 18" viewing area fabricated from 1/4" acrylic or polycarbonate sheet. Install window with top at 6'-6" above floor height in a manner that provides unobstructed vision from outside to inside of the Work Area. Protect window from damage from scratching, dirt or any coatings used during the work. A sufficient number of windows are to be installed to provide observation of all portions of the Work Area that can be made visible from adjacent areas.

EMERGENCY EXITS:

Provide emergency exits as set forth below:

Emergency Exits: At each existing exit door from the Work Area provide the following means for emergency exiting:

Arrange exit door so that it is secure from outside the Work area but permits exiting from the Work Area.

Mark outline of door on Primary and Critical Barriers with luminescent paint or tape at least 1" wide. Hang a retractable blade razor knife on a string adjacent outline. Arrange Critical and Primary barriers so that they can be easily cut with one pass of razor knife. Paint inside the door outline, the words "EMERGENCY EXIT" no higher than three feet (3') off of the floor with luminescent paint or tape in letters at least one foot high and 2" thick.

CONTROL ACCESS:

Isolate the Work Area to prevent entry into building(s), Work Area(s) or surrounding controlled areas by unauthorized personnel. Window systems to be removed will be sealed completely from the interior of the building utilizing hard barriers. These hard barriers shall be moved in conjunction with the asbestos containments allowing access for other trades to areas remediated previously.

Provide Warning Signs at each door leading to Work Area reading as follows:

DANGER ASBESTOS

CANCER AND LUNG DISEASE HAZARD AUTHORIZED PERSONNEL ONLY

RESPIRATORS AND PROTECTIVE CLOTHING ARE REQUIRED IN THIS AREA

Provide spacing between respective lines at least equal to the height of the respective upper line. ALTERNATE METHODS OF ENCLOSURE:

Alternate methods of containing the Work Area may be submitted to the Environmental Consultant for review in accordance with procedures set forth. Do not proceed with any such method(s) without prior written acceptance from the Environmental Consultant.

RESPIRATORY AND WORKER PROTECTION:

Before proceeding beyond this point in providing Temporary Enclosures:

Provide Respiratory Protection per Section 01562 Provide Personnel Decontamination Unit per Section 01563 CRITICAL BARRIERS:

Completely Separate the Work Area(s) from other portions of the building, and the outside by closing all openings with sheet plastic barriers at least two layers of 6-mil in thickness.

Where the work area is immediately adjacent to an occupied area, the Abatement Contractor shall construct a rigid, hard barrier comprised of fire rated sheetrock/gypsum board, screwed to studs placed 24" on center. This barrier shall be framed and painted on the occupied side to match the existing surroundings.

Individually seal all ventilation openings (supply and exhaust), lighting fixtures, clocks, doorways, windows, convectors, speakers, etc. in the Work Area with duct tape alone or with polyethylene sheeting at least 6-mil in thickness, taped securely in place with duct tape. Maintain seal until all Work including Project Decontamination is completed. Power to lighting fixtures shall be disconnected prior to sealing with polyethylene sheeting to avoid melting or burning of sheeting or contractor may opt to use fire retardant poly.

Provide Sheet Plastic barriers at least 6 mil in thickness as required to seal openings completely from the Work Area into adjacent areas.

Exterior Windows critical barriers will require the use of black or colored 6 mil thick plastic sheeting

Provide Pressure Differential System per Section 01513.

Clean housings and ducts of all overspray materials prior to erection of any Critical Barrier that will restrict access.

PREPARE AREA:

Scaffolding/Lifts: If fixed scaffolding/lifts are to be used to provide access, HEPA vacuum and wet clean area prior to scaffolding/lift installation.

Remove all general construction items such as cabinets, casework, door and window trim, moldings, ceilings, trim, etc., which cover the surface of the Work as required to prevent interference with the Work.

Clean All Surfaces In Work Area with a HEPA filtered vacuum or by wet wiping, prior to the installation of primary barrier.

PRIMARY BARRIERS:

Protect building and other surfaces in the Work Area from damage from water and high humidity or from contamination from asbestos-containing debris, slurry or high airborne fiber levels by covering with a primary barrier as described below.

Sheet Plastic: Protect surfaces in the Work Area as follows unless a waiver has been submitted and approved. Perform Work in the following sequence.

Cover all floors in Work Area including "Critical Barrier" sheet plastic barriers with, at a minimum, two (2) layers of polyethylene sheeting, at least 6 mil in thickness, mechanically supported and sealed with duct tape or spray-glue in the same manner as "Critical Barrier" sheet plastic barriers. Tape all joints including the joining with the wall covering with duct tape or as otherwise indicated on the Contract Documents or in writing by the Environmental Consultant. Contractor may opt to submit a waiver from these requirements.

Cover all walls and ceilings in Work Area including "Critical Barrier" sheet plastic barriers with, at a minimum, two (2) layers of polyethylene sheeting, at least 6 mil in thickness, mechanically supported and sealed with duct tape or spray-glue in the same manner as "Critical Barrier" sheet plastic barriers. Tape all joints including the joining with the floor or wall covering with duct tape or as otherwise indicated on the Contract Documents or in writing by the Environmental Consultant.

Stairs and Ramps: Do not cover stairs or ramps with unsecured sheet plastic. Where stairs or ramps are covered with plastic, provide 3/4" exterior grade plywood treads securely held in place, over plastic. Do not cover rungs or rails with any type of protective materials.

Repair of Damaged Polyethylene Sheeting: Remove and replace plastic sheeting, which has been damaged by abatement operations or where seal has failed allowing water to seep between layers. Remove affected sheeting and wipe down entire area. Install new sheet plastic only when area is completely dry.

RECOMMENDED WORK PRACTICES FOR THE EXTERIOR REMOVAL OF WINDOW SYSTEMS WITH NON-FRIABLE ASBESTOS CONTAINING CAULK AND/OR GLAZING

Note: This is intended to provide recommended work practices for the removal of window systems with non-friable asbestos caulk and/or glazing. The practices outlined within are based on the windows being removed from the outside of the building. If the windows cannot be removed from the outside of the building, the Missouri Department of Natural Resources (MDNR) and United States Environmental Protection Agency (USEPA) have determined through guidance documents that the Asbestos Hazard Emergency Response Act (AHERA) rules may become applicable if the material is entrained into the building. These work practices will not meet the minimum requirements set forth by AHERA if the material is brought inside the building.

In addition, current regulations indicate the asbestos must remain in a non-friable classification throughout the removal project. Should the material be rendered friable, MDNR and USEPA have promulgated rules to address these materials. Therefore, the caulk and/or glazing should not be disturbed by mechanical means, sanded, abraded or drilled during the removal process. The use of mechanical means to disturb the material is strictly prohibited.

Window openings should be covered and sealed with a minimum of a plywood barrier and (2) layers of plastic sheeting on the inside of the building prior to removal. Minimum thickness of the plastic sheeting is 6-mil. The plastic sheeting should be sealed to the opening using duct tape. Plastic sheeting shall be used as a drop cloth under the immediate work area to collect debris generated during the removal process. Should the debris consist of the asbestos containing caulk or glazing, the drop cloth and its contents shall be placed into an asbestos danger bag for appropriate disposal. Danger Asbestos Tape and warning signs shall be placed around the perimeter of the immediate work area. Workers inside the demarcated area shall meet all training and respiratory protection requirements as dictated by OSHA.

Other Work Practices Other work practices may include, but are not necessarily limited to, the following:

· The asbestos containing materials shall be wetted with a water solution containing an effective wetting agent.

· Contractor may only use manual methods for the removal of the window system. Mechanical methods that may disturb the asbestos containing materials are strictly prohibited.

· The cleaning of any asbestos containing residual material must be done by wet manual methods. Do not clean the surface using mechanical equipment such as a sander, grinder, mechanical chipper, etc. Any debris generated during this process shall be placed into an asbestos danger bag for appropriate disposal.

STOP WORK: If the Critical or Primary barrier falls or is breached in any manner, stop Work immediately. Do not start Work until authorized in writing by the Environmental Consultant.

EXTENSION OF WORK AREA: If the Critical Barrier is breached in any manner that could allow the passage of asbestos debris or airborne fibers, then add affected area to the Work Area, enclose it as required by this Section of the Specification and decontaminate it as described in Section 01711 Project Decontamination.

END OF SECTION - 01526

TEMPORARY

ENCLOSURES

SECTION 01562 - RESPIRATORY PROTECTION

PART 1 - GENERAL

RELATED DOCUMENTS:

General provisions of Contract and other Division-1 Specification Sections apply to work of this Section.

DESCRIPTION OF WORK:

Instruct and train each worker involved in asbestos abatement or maintenance and repair of friable asbestos-containing materials in proper respiratory use and require that each worker always wear a respirator, properly fitted on the face in the Work Area from the start of any operation which may cause airborne asbestos fibers until the Work Area is completely decontaminated. Use respiratory protection appropriate for the fiber level encountered in the work place or as required for other toxic or oxygen-deficient situations encountered.

STANDARDS:

Except to the extent that more stringent requirements are written directly into the Contract Documents, the following regulations and standards have the same force and effect (and are made a part of the Contract Documents by reference) as if copied directly into the Contract Documents, or as if published copies were bound herewith. Where there is a conflict in requirements set forth in these regulations and standards, meet the more stringent requirement.

OSHA - U.S. Department of Labor Occupational Safety and Health Administration, Safety and Health Standards 29 CFR 1910, Section 1001 and Section 1910.134. 29 CFR 1926.58.

CGA - Compressed Gas Association, Inc., New York, Pamphlet G-7, "Compressed Air for Human Respiration", and Specification G-7.1 "Commodity Specification for Air".

CSA - Canadian Standard Association, Rexdal, Ontario, Standard Z180.1-1978, "Compressed Breathing Air".

ANSI - American National Standard Practices for Respiratory Protection, ANSI Z88.2-1990.

NIOSH -National Institute for Occupational Safety and Health MSHA - Mine Safety and Health Administration

ALLOWABLE CONTAMINANTS:

Supply air that has an asbestos concentration no greater than outside ambient conditions.

The following table sets forth the quantity of any given contaminant allowed according to the referenced standards:

Condensed Hydrocarbons, mg/m3

Total Hydrocarbons, as methane, PPM/v

Water Vapor, PPM/v, dew point

(1)

(1)

24 ppm

-63oF

Nitrogen Dioxide

(NO2)

0.2

Nitrous Oxide (N20), PPM/v

Sulfur Dioxide (SO2), PPM/v

Halogenated Solvents, PPM/v

Other Gaseous Contaminants

(2)

- Indicates that the standard shows no limiting characteristics

(1) The CGA standards do not call out a specific moisture limit when the ambient temperature is above freezing. However, since a moisture content no greater than a -50 Degrees Fahrenheit dew point (66 PPM/v) is necessary for carbon monoxide elimination, the CO limits could not be met unless the air were Dried to a -50 Degrees Fahrenheit dew point or better.

(2) Maximum allowable content of tricholotrifluorethane, dichlorodifluoromethane, and chlorodifluoromethane is 2 PPM/v for each. Unlisted contaminants shall not exceed one-tenth of the Threshold Limit Values (TLV's) for Chemical Substances in Workroom air adopted by the American Conference of Governmental Industrial Hygienists (ACGIH).

PART 2 - EQUIPMENT

AIR PURIFYING RESPIRATORS

Respirator Bodies: Provide half face or full face type respirators. Equip full face respirators with a nose cup or other anti-fogging device as would be appropriate for use in air temperatures less than 32 degrees Fahrenheit.

Filter Cartridges: Provide, at a minimum, HEPA type filters labeled with NIOSH and MSHA Certification for "Radionuclides, Radon Daughters, Dust, Fumes, Mists including Asbestos-Containing Dusts and Mists" and color coded in accordance with ANSI Z228.2 (1990). In addition, a chemical cartridge Section may be added, if required, for solvents, etc., in use. In this case, provide cartridges that have each Section of the combination canister labeled with the appropriate color code and NIOSH/MSHA Certification.

Non-permitted respirators do not use single use, disposable or quarter face respirators.

SUPPLIED AIR RESPIRATOR SYSTEMS:

Provide equipment capable of producing air of the quality and volume required by the above reference standards applied to the job site conditions and crew size. Comply with provisions of this specification if more stringent than the governing standard.

Face Piece and Hose: Provide full face piece and hose by same manufacturer that has been certified by NIOSH/MSHA as an approved Type "C" respirator assembly operating in pressure demand mode with a positive pressure face piece.

Auxiliary backup system: In atmospheres which contain sufficient oxygen (greater than or equal to 19.5% oxygen) provide a pressure-demand full face piece supplied air respirator equipped with an emergency back up HEPA filter.

Escape air supply: In atmospheres which are oxygen deficient (less than 19.5% oxygen) provide a pressure-demand full face piece supplied air respirator incorporating an auxiliary self-contained breathing apparatus (SCBA) which automatically maintains an uninterrupted air supply in pressure demand mode with a positive pressure face piece.

Backup air supply: Provide a reservoir of compressed air located outside the Work Area which will automatically maintain a continuous uninterruptable source of air automatically available to each connected face piece and hose assembly in the event of compressor shut-down, contamination of air delivered by compressor, power loss or other failure. Provide sufficient capacity in the back-up air supply to allow a minimum escape time of one-half hour times the number of connections available to the Work Area. Air requirement at each connection is the air requirement of the respirators in use plus the air requirement of an average-sized adult male engaged in moderately strenuous activity.

Warning device: Provide a warning device that will operate independently of the building's power supply. Locate so that alarm is clearly audible above the noise level produced by equipment and work procedures in use, in all parts of the Work Area and at the compressor. Connect alarm to warn of:

Compressor shut down or other fault requiring use of backup air supply Carbon Monoxide (CO) levels in excess of 10 PPM/V

Carbon Monoxide (CO) Monitor: Continuously monitor Carbon Monoxide (CO) levels. Place monitors in the air line between compressor and back-up air supply and between backup air supply and workers. Connect monitors so that they also sound an alarm as specified under "Warning Devices".

Compressor Shut Down: Interconnect monitors, alarms and compressor so that compressor is automatically shut down and the alarms sounded if any of the following occur:

Carbon Monoxide (CO) concentrations exceed 10 PPM/v in the air line between the filter bank and backup air supply Compressor temperature exceeds normal operating range

Compressor Motor - Provide a compressor driven by an electric motor. Do not use a gas or diesel engines to drive compressor unless approved in writing by the contracting officer. Insure that electrical supply available at the work site is adequate to energize motor.

PART 3 - EXECUTION

GENERAL:

Respiratory Protection Program: Comply with ANSI Z88.2 - 1990 "Practices for Respiratory Protection" and OSHA 29 CFR 1910 and 1926.

Require that respiratory protection be used at all times that there is any possibility of disturbance of asbestos-containing materials whether intentional or accidental.

Require that a respirator be worn by anyone in a Work Area at all times, regardless of activity, during a period that starts with any operation which could cause airborne fibers until the area has been cleared for re-occupancy in accordance with Section 01714.

Regardless of Airborne Fiber Levels: Require that the minimum level of respiratory protection used be half-face air-purifying respirators with high efficiency filters.

Do not allow the use of single-use, disposable, or quarter-face respirators for any purpose.

FIT TESTING:

Initial Fitting: Provide initial fitting of respiratory protection during a respiratory protection course of training set up and administered by a Certified Industrial Hygienist. Fit types of respirator to be actually worn by each individual.

Allow an individual to use only those respirators for which training and fit testing has been provided.

Upon Each Wearing: Require that each time an air-purifying respirator is put on it be checked for fit with a positive and negative pressure fit test in accordance with the manufacturer's instructions or ANSI Z88.2 (1990).

TYPE OF RESPIRATORY PROTECTION REQUIRED:

Provide Respiratory Protection as indicated in paragraph below. Where paragraph below does not apply, determine the proper level of protection by dividing the expected or actual airborne fiber count in the Work Area by the "protection factors" given below. The level of respiratory protection which supplies an airborne fiber level inside the respirator at or below 0.01 fibers per cubic centimeter is the minimum level of protection allowed.

Type "C" Supplied-air Respirators: full face piece pressure demand supplied air respirators are to be used initially by all workers engaged in the removal, or demolition of pipes, structures, or equipment covered or insulated with asbestos, or in the removal or demolition of asbestos insulation or coverings, or any other activity which results in or may result in airborne asbestos fiber levels greater than 1.0 fiber per cubic centimeter in the work area. With the approval of the contracting officer's representative, respirator selection may be downgraded based on actual fiber concentrations or historical data on similar projects.

PERMISSIBLE EXPOSURE LIMIT (PEL):

8-Hour Time Weighted Average (TWA) of asbestos fibers to which any worker may be exposed shall not exceed the following.

Fibers: For purposes of this Section, fibers are defined as all fibers regardless of composition as counted in the

OSHA Reference Method (ORM), or NIOSH 7400 procedure.

Electron Microscopy: If Electron Microscopy is used to determine airborne fiber levels, only asbestos fibers will be enumerated, but fibers of any size detected by the testing of Section 01714 Work Area Clearance will be counted.

Time Weighted Average (TWA) - 0.01 fibers/cubic centimeter

RESPIRATORY PROTECTION FACTOR:

Respirator Type Protection Factor

Air purifying: 10 Negative pressure respirator High efficiency filter half face piece Air purifying: 50 Negative pressure respirator High efficiency filter full face piece Powered Air Purifying (PAPR): 100 Positive pressure respirator High efficiency filter Full face piece

Type C supplied air: 1,000 Positive pressure respirator Pressure demand or other positive pressure mode Full face piece equipped with a high efficiency filter escape

Type C supplied air: >1,000 Positive pressure respirator Pressure demand or other positive pressure mode Full face piece equipped with an Auxiliary positive pressure self-contained breathing apparatus (SCBA)

Self-contained breathing >1,000 Apparatus (SCBA):

Positive Pressure respirator Pressure demand or other positive pressure mode Full face piece

01562 -

RESPIRATORY

PROTECTION

AIR PURIFYING RESPIRATORS:

Negative pressure - half or full face mask: Supply a sufficient quantity of respirator filters approved for asbestos, so that workers can change filters during the work day. Require that respirators are wet-rinsed, and filters discarded, each time a worker leaves the Work Area. Require that new filters be installed each time a worker re-enters the Work Area. Store respirators and filters at the job site in the changing room and protect totally from exposure to asbestos prior to their use.

Powered air purifying - full face mask: Supply a sufficient quantity of high efficiency respirator filters approved for asbestos so that workers can change filters at any time that flow through the face piece decreases to the level at which the manufacturer recommends filter replacement. Require that regardless of flow, filter cartridges be replaced after 40 hours of use. Require that HEPA elements in filter cartridges be protected from wetting during showering. Require entire exterior housing of respirator, including blower unit, filter cartridges, hoses, battery pack, face mask, belt, and cords, be washed each time a worker leaves the Work Area. Caution should be used to avoid shorting battery pack during washing. Provide an extra battery pack for each respirator so that one can be charging while one is in use.

TYPE "C" RESPIRATOR:

Air Systems Monitor: Continuously monitor the air system operation including compressor operation, filter system operation, backup air capacity and all warning and monitoring devices at all times that system is in operation. Assign an individual, trained by manufacturer of the equipment in use or by a Certified Industrial Hygienist, in the operation and maintenance of the system to provide this monitoring. Assign no other duties to this individual which will take him away from monitoring the air system.

END OF SECTION - 01562

SECTION 01563 - DECONTAMINATION UNITS

General provisions of the Contract and other Division-1 Specification Sections apply to work of this Section.

DESCRIPTION OF WORK:

Provide separate Personnel and Equipment Decontamination facilities. Require that the Personnel Decontamination Unit be the only means of ingress and egress for the Work Area. Require that all materials exit the Work Area through the Equipment Decontamination Unit.

Polyethylene Sheet: A single polyethylene film in the largest sheet size possible to minimize seams, 4.0 or 6.0 mil thick as indicated, clear, frosted, or black as required.

Duct Tape: Provide duct tape in 2" or 3" widths as indicated, with an adhesive which is formulated to stick aggressively to sheet polyethylene.

Spray Adhesive: Provide spray adhesive in aerosol cans which is specifically formulated to stick tenaciously to sheet Polyethylene.

Shower Pan: Provide one piece waterproof shower pan 4' x 8' by 6" deep. Fabricate from seamless fiberglass minimum 1/16" thick reinforced with wood, 18 ga. stainless or galvanized steel with welded seems, copper or lead with soldered seams, or a seamless liner of minimum 60 mil thick elastomeric membrane.

Shower Walls: Provide 8' long by approximately 7' high walls fabricated from rigid, impervious, waterproof material, either corrugated fiberglass roofing or equivalent. Structurally support as necessary for stability.

Shower Head and Controls: Provide a factory-made shower head producing a spray of water which can be adjusted for spray size and intensity. Feed shower with water mixed from hot and cold supply lines. Arrange so that control of water temperature, flow rate, and shut off is from inside shower without outside aid.

Filters: Provide cascaded filter units on drain lines from showers or any other water source carrying asbestos- contaminated water from the Work Area. Provide units with disposable filter elements as indicated below. Connect so that discharged water passes primary filter and output of primary filter passes through secondary filter.

Primary Filter - Passes particles 20 microns and smaller Secondary Filter - Passes particles 5 microns and smaller

Hose Bib: Provide heavy bronze angle type with wheel handle, vacuum breaker, and 3/4" National Standard male hose outlet.

Shower Stall: For Wash down Station provide leak tight shower enclosure with integrated drain pan fabricated from fiberglass or other durable waterproof material, approximately 3' x 3' square with minimum 6' high sides and back. Structurally support as necessary for stability. Equip with hose bib, as specified in this Section, mounted at approximately 4'-0" above drain pan. Connect drain to a reservoir, pump water from reservoir through filters to a drain or store and use for amended water.

Lumber: Provide kiln dried lumber of any grade or species.

Sump Pump: Provide totally submersible waterproof sump pump with integral float switch. Provide unit sized to pump 2 times the flow capacity of all showers or hoses supplying water to the sump, through the filters specified herein when they are loaded to the extent that replacement is required. Provide unit capable of pumping debris, sand, plaster or other materials washed off during decontamination procedures without damage to mechanism of pump. Adjust float switch so that a minimum of 3" remains between top of liquid and top of sump pan.

PART 3 - EXECUTION

PERSONNEL DECONTAMINATION UNIT:

Provide a Personnel Decontamination Unit consisting of a serial arrangement of connected rooms or spaces; Changing Room, Drying Room, Shower Room, Equipment Room. Require all persons without exception to pass through this Decontamination Unit for entry into and exiting from the Work Area for any purpose. Do not allow parallel routes for entry or exit. Do not remove equipment or materials through Personnel Decontamination Unit. Provide temporary lighting within Decontamination Units as necessary to reach a lighting level of 100 foot candles.

Changing Room (clean room): Provide a room that is physically and visually separated from the rest of the building for the purpose of changing into protective clothing.

Construct using polyethylene sheeting, at least 6 mil in thickness, to provide an airtight seal between the changing room and the rest of the building.

Locate so that access to Work Area from Changing Room is through Shower Room. Separate Changing Room from the building by a sheet plastic flapped doorway.

Require workers to remove all street clothes in this room, dress in clean, disposable coveralls, and don respiratory protection equipment. Do not allow asbestos-contaminated items to enter this room. Require Workers to enter this room either from outside the structure dressed in street clothes, or naked from the showers.

An existing room may be utilized as the Changing Room if it is suitably located and of a configuration whereby workers may enter the Changing Room directly from the Shower Room. Protect all surfaces of room with sheet plastic as set forth in Section 01526 Temporary Enclosures. Authorization for this must be obtained from the Owner's Representative in writing prior to start of construction. Submit written request in accordance with Section 01632 "Product Substitutions" detailing layout and protective measures proposed.

Maintain floor of changing room dry and clean at all times. Do not allow overflow water from shower to wet floor in changing room.

Damp wipe all surfaces twice after each shift change with a disinfectant solution. Provide posted information for all emergency phone numbers and procedures.

Provide 1 storage locker per employee.

Airlock/Drying Room: Provide an airlock or a drying room as an airlock and a place for workers to dry after showering.

Construct room by providing a pan continuous with or draining to Shower Room pan. Install a freely draining wooden or non-skid metal floor in pan at elevation of top of pan.

Separate this room from the rest of the building with airtight walls fabricated of 6 mil polyethylene.

Separate this room from the Changing Room and Shower Room with airtight walls fabricated of 6 mil polyethylene. Separate from Changing Room by a sheet plastic flapped doorway.

Provide a continuously adequate supply of disposable bath towels.

Shower Room: Provide a completely watertight operational shower to be used for transit by cleanly dressed workers heading for the Work Area from the Changing Room, or for showering by workers headed out of the Work Area after undressing in the Equipment Room.

Construct room by providing a shower pan and 2 shower walls in a configuration that will cause water running down walls to drip into pan. Install a freely draining wooden floor in shower pan at elevation of top of pan.

Separate this room from the rest of the building with airtight walls fabricated of 6 mil polyethylene. Separate this room from the Drying Room and Airlock with airtight walls fabricated of 6 mil polyethylene.

Provide splash proof entrances to Drying Room or Airlock with doors arranged in the following configuration:

At each entrance to the Shower Room construct a doorframe out of nominal 2" x 4" lumber with 1-1/2" jambs (sides) and 1-1/2" head (top) and sill (bottom). Attach to this door frame two overlapping flaps of elastomeric membrane material, fastened at the head (top) and jambs (sides) (by clamping between a 1-1/2" x 3/4" batten and frame). Overlap the flaps a minimum of 6" in a direction that presents a shingle-like configuration to the water stream from the shower. Overlap sill (bottom) by 1-1/2" minimum. Arrange so that any air movement out of the Work Area will cause the flaps to seal against the doorframe.

Provide shower head and controls.

Provide temporary extensions of existing hot and cold water and drainage, as necessary for a complete and operable shower.

Provide a continuously adequate supply of soap and maintain in sanitary condition.

Arrange so that water from showering does not splash into the Changing or Equipment Rooms.

Arrange water shut off and drain pump operation controls so that a single individual can shower without assistance from either inside or outside of the Work Area.

Provide flexible hose shower head.

Pump waste water to drain or to storage for use in amended water. If pumped to drain, provide 20 micron and 5 micron waste water filters in line to drain or waste water storage. Change filters daily or more often if necessary.

Provide hose bib.

Airlock: Provide an airlock between Shower Room and Equipment Room. This is a transit area for workers. Separate this room from Equipment Room by a sheet plastic flap doorway.

Separate this room from the rest of the building with…