(1) Required Use of Licensed Asbestos Contractors. Except as allowed by 453 CMR 6.14(1)(a), only Asbestos Contractors licensed pursuant to 453 CMR 6.03(2) and 6.05 shall carry out Asbestos Response Actions.

(a) Exception to Licensing Requirement for Entities Conducting Response Actions in their Own Facilities. Persons, firms, corporations or other entities who carry out Asbestos Response Actions at their own property or usual place of business or employment using their own regular employees or Responsible Persons need not be licensed as Asbestos Contractors, provided that the requirements of 453 CMR 6.14(2) and (3) are met, and the work is otherwise conducted in accordance with the applicable requirements of 453 CMR 6.00.

(2) Requirement for On-Site Supervisor. The Responsible Persons of the licensed Asbestos Contractor or other entity carrying out an Asbestos Response Action shall ensure that a certified Asbestos Supervisor who is an employee or Responsible Person of said Asbestos Contractor or entity is present at the worksite and in control of the work at all times when work is in progress.

(3) Requirement for Use of Certified Asbestos Workers. The Responsible Persons of the licensed Asbestos Contractor or other entity carrying out an Asbestos Response Action shall ensure that all persons who perform the functions of Asbestos Workers in the Work Area are Responsible Persons or employees of said Asbestos Contractor or entity and that said persons are certified pursuant to 453 CMR 6.03(3).

(4) Required Work Practices. Asbestos Contractors, Asbestos Supervisors and others carrying out, or having supervisory authority over, Asbestos Response Actions shall ensure that the work practice requirements of 453 CMR 6.14(4) are met.

(a) Work Area Preparation.

1. Exclusion of Persons from the Work Area. All persons not directly involved in the work operation shall be excluded from the Work Area.

2. Sign In/Out Log. The Asbestos Contractor or other entity carrying out an Asbestos Response Action shall ensure that each person entering or leaving the Work Area individually completes the appropriate entries in the sign-in/out log referenced at 453 CMR 6.11(3)(b)5., including printed name, signature, Massachusetts Certification Number, where applicable, and the time of each entry or exiting.

2. Posting of Warning Signs. Warning signs meeting the specifications set forth in 29 CFR Part 1926.1101 (k)(6)(i) shall be posted at all approaches to the Work Area. Signs shall be posted a sufficient distance from the Work Area to permit a person to read the sign(s) and take precautionary measures to avoid exposure to asbestos.

3. Shutdown of HVAC Systems. The facility heating, ventilation and air-conditioning (HVAC) systems of the Work Area shall be shut down, locked out and isolated.

4. Removal of Moveable Objects. All moveable objects shall be removed from the Work Area. Items to be reused which may have been previously contaminated with asbestos shall be decontaminated by HEPA vacuuming and/or wet cleaning prior to their being removed from the Work Area. All other contaminated items which are not to be reused shall be disposed as asbestos waste.

5. Covering of Non-Moveable Objects. All non-moveable or fixed objects remaining within the Work Area shall be wrapped or covered with six mil thick (minimum) plastic sheeting. Plastic sheet coverings shall be completely sealed with duct tape or equivalent.

6. Isolation of Work Area. The Work Area shall be isolated by sealing all openings, including but not limited to, windows, doors, ventilation openings, drains, grilles, and grates with six mil thick (minimum) plastic sheeting and duct tape or the equivalent. For Asbestos Response Actions performed in Public Facilities, large openings such as open doorways, elevator doors, and passageways shall be first sealed with solid construction, such as plywood over studding, which shall constitute the outermost boundary of the asbestos Work Area. All cracks, seams and openings in such solid construction shall be caulked or otherwise sealed, so as to prevent the movement of asbestos fibers out of the Work Area.

7. Covering of Floor and Wall Surfaces. Except as allowed by 453 CMR 6.14(4)(a)7.a. through c., floor and wall surfaces shall be covered with plastic sheeting. All seams and joints shall be sealed with duct tape or equivalent. Floor covering shall consist of at least two layers of six mil plastic sheeting, with the edges up-turned to cover at least the bottom 12 inches of the adjoining wall(s). Wall covering shall consist of a minimum of two layers of four mil plastic sheeting. Wall covering shall extend from ceiling to floor and overlap the up-turned floor coverings without protruding onto the floor. Duct tape shall be used to seal the seams in the plastic sheeting at the wall-to-floor joints.

a. Exception to Covering Requirement Where Surfaces Are Impervious.

Compliance with 453 CMR 6.14(4)(a)7. is optional where floors and walls are covered by ceramic tile or other impervious materials that are free from holes, drains, cracks, fissures or other openings and which may be thoroughly decontaminated by washing at the conclusion of the work, provided that such action does not result in the passage of asbestos fibers from the Work Area.

b. Exception to Covering Requirement For Abatement Surfaces. Compliance with 453 CMR 6.14(4)(a)7. is not required for those floor and wall surfaces from which asbestos coverings are removed.

c. Exception to Wall Surface Covering Requirement Where Glovebags are Used. Covering of wall surfaces is optional for Asbestos Response Actions where Glovebags are used as the sole means of removal or repair. Where Glovebags are used, the floor of the Work Area shall be covered with a minimum of one layer of six mil-thick plastic sheeting.

8. GFCI Protection. All sources of electric power for the Work Area shall be ground fault circuit interrupter (GFCI) protected.

(b) Use of Decontamination Facilities.

1. Requirement for Use. Except as allowed by 453 CMR 6.14(4)(b)2., Asbestos Contractors and others carrying out Asbestos Response Actions shall supply and ensure the use of a three-compartment decontamination facility, as prescribed by 29 CFR Part 1926.1101(j)(1). Except as may be required during emergencies which endanger life or health, the decontamination facility shall be the sole means through which the isolated work space is accessed while work is in progress.

2. Exception to Decontamination System Requirement for Work Less Than 25 Linear/Ten Square Feet. A change room may be used in lieu of the three- compartment decontamination facility specified by 453 CMR 6.14(4)(b)1. on projects which involve the disturbance of less than 25 linear feet of asbestos on or in pipes, ducts or wires, or less than ten square feet of asbestos on or in structures or components other than pipes, ducts or wires. Where a change room is used it shall be constructed and operated in accordance with OSHA Asbestos Regulations 29 CFR Part 1926.1101(j)(2).

3. Warm Water Required. Warm water shall be supplied to the showers of the decontamination facility required by 453 CMR 6.14(4)(b)1.

4. Decontamination of Personnel Required. No employees shall leave the Work Area without first decontaminating their persons by showering, wet washing or HEPA vacuuming to remove all asbestos debris.

5. Location of Decontamination Facilities. Where feasible, decontamination facilities shall be contiguous with the Work Area. Where such location is not feasible, a remote decontamination facility shall be sited as closely as possible to the Work Area. Persons using such a remotely- sited decontamination facility shall remove visible debris from their persons by HEPA vacuuming prior to donning clean disposable coveralls while still in the Work Area, and then proceed directly to the remote decontamination system to shower and change clothes.

6. Equipment Decontamination. No equipment, supplies, or materials (except properly containerized waste material) shall be removed from an asbestos Work Area unless such equipment, supplies or materials have been thoroughly cleaned free of asbestos debris. Where decontamination is not feasible, such materials shall be wrapped in a minimum of two layers of six mil polyethylene sheeting with all joints, seams and overlaps sealed with tape or containerized in a metal, plastic or fiber drum with a locking lid. Said wrapped equipment, supplies or materials shall be labeled as being asbestos-contaminated prior to removal from the Work Area. HEPA vacuums shall be emptied of contents prior to removal from the Work Area. Air filtration devices shall have used prefilters removed and replaced with fresh filters prior to removal from the Work Area. Used HEPA filters and prefilters shall be disposed of as asbestos waste.

(c) Requirement For Work Area Ventilation System. Except as allowed by 453 CMR 6.14(4)(c)1. and 2., a HEPA-filtered Work Area ventilation system shall be used to maintain a reduced atmospheric pressure of at least -0.02 column inches of water pressure differential within the contained Work Area. The system shall be in operation at all times from the commencement of the asbestos project until the requirements of 453 CMR 6.14(5)(b) have been met. The ventilation equipment utilized shall be of sufficient capacity to provide a minimum of four air changes per hour. Ventilation units shall be operated in accordance with Appendix J of EPA Guidance Document EPA 560/5-85-024)and 29 CFR Part 1926.1101(g)(5)(i). Make-up air entering the Work Area shall pass through the decontamination system whenever possible. Exhaust air shall be HEPA-filtered before being discharged outside of the Work Area. Exhaust air tubes or ducts associated with the Work Area ventilation system shall be free of leaks. In all cases where feasible exhaust air shall be discharged to the outside of the building. If access to the outside is not available, exhaust air shall be discharged to an area within the building, but in no case shall exhaust air be discharged into occupied areas of the building or into areas of the building which contain exposed or damaged asbestos. When exhaust air is discharged to the interior of a building, the outflow shall be sampled and analyzed at least once per day per machine using sampling and analysis methods prescribed by the NIOSH Analytical Method 7400 referenced at 40 CFR Part 763, Appendix A. If at any time fiber levels in the exhausted air exceed 0.01 fibers/cc the work operation shall stop immediately, and the corresponding ventilation unit(s) shall be shut off and repaired or replaced before the Asbestos Response Action is resumed.

1. Exception to Work Area Ventilation System Requirement for Work Less than 25 Linear/Ten Square Feet. Compliance with 453 CMR 6.14(4)(c) is optional for Asbestos Response Actions which involve the removal, encapsulation or enclosure of 25 or fewer linear feet of asbestos on or in pipes, ducts or wires or ten or fewer square feet of asbestos on or in structures or components other than pipes, ducts or wires.

2. Exception to Work Area Ventilation System Requirement where Glovebags are Used. Compliance with 453 CMR 6.14(4)(c) is optional for Asbestos Response Actions where Glovebags are used as the sole means of removal or repair.

(d) Work Procedures.

1. Wetting of Asbestos. Prior to removal, ACM shall be thoroughly wetted with Amended Water. Water shall not be applied in amounts that will cause run-off or leakage of the water from the Work Area. Once removed, ACM shall be kept wet until containerized pursuant to 453 CMR 6.14(4)(d)2.

2. Containerization of Asbestos. Removed ACM and asbestos-contaminated debris within the Work Area shall be promptly cleaned up and containerized. Containerized ACM shall be removed from the Work Area at least once each working shift. Waste not containing components with sharp edges shall be containerized in double-thickness plastic bags (six mil minimum thickness each bag) or in metal, plastic or fiber drums with locking lids. ACM with sharp-edged components shall be contained in metal, plastic or fiber drums with locking lids. Large components removed intact shall be wrapped in a minimum of two layers of six mil polyethylene sheeting with all joints and seams sealed with duct tape, and labeled as ACM prior to removal from the contained Work Area.

3. Material Deposition. ACM shall not be dropped or thrown from heights greater than 15 feet. Materials that must be lowered from greater than 15 feet must be transported through a dust-tight chute, or containerized prior to lowering to the ground or floor.

4. Enclosure. Where friable ACM is enclosed during an Asbestos Response Action, the following provisions shall also apply:

a. Enclosures over pipes, ducts, tanks, boilers or other objects shall be labeled as containing ACM and identified on building records.

b. Enclosure systems shall be constructed to be dust tight.

5. Encapsulation. Where friable ACM is encapsulated during an Asbestos Response Action, encapsulant shall not be applied to severely damaged or deteriorating ACM.

6. Demolition. The notification provisions 453 CMR 6.12 and the provisions of 453 CMR 6.14 shall apply to any planned demolition of any facility containing ACM. Such work must also be performed in conformance with Massachusetts Department of Environmental Protection regulations, 310 CMR 7.00, 18.00 and 19.00 and the requirements of the EPA National Emission Standard for Asbestos (NESHAP), as contained in 40 CFR Part 61, Subpart M.

7. Enclosure or Encapsulation of Exposed ACM. Any friable ACM that has been exposed as a result of an Asbestos Response Action shall be suitably enclosed or encapsulated in accordance with 453 CMR 6.14(4)(d)4. and/or 6.14(4)(d)5.

(e) Specific Work Practice Requirements for Glove Bag Operations. Asbestos Contractors and others having supervisory authority over Asbestos Response Actions involving glove bag use shall ensure that the following work practice requirements are met:

1. Glove bags shall be installed so as to form an airtight covering over the structure to which they are applied. Any friable ACM in the immediate area of glove bag attachment shall be wrapped and sealed in two layers of six mil plastic sheeting or otherwise rendered intact prior to glovebag installation. All openings in the glove bag shall be sealed against leakage with duct tape or equivalent material.

2. ACM shall be wet with Amended Water prior to its removal and maintained in a wet condition inside the glove bag.

3. Any ACM that has been exposed as result of the glove bag operation shall be suitably encapsulated or enclosed so as to prevent the leakage of asbestos fibers prior to the removal of the glove bag.

4. All surfaces from which ACM has been removed inside the glove bag and the upper portions of the glove bag itself shall be cleaned free of visible debris prior to removal of the glovebag.

5. Debris shall be isolated in the bottom of the glove bag by twisting the bag so as to form a closure in the middle. This closure shall then be taped around with duct tape or equivalent material. Air in the glove bag shall be exhausted with a HEPA vacuum cleaner prior to its removal.

6. Following removal from the structure the glove bag and its contents shall be containerized in accordance with 453 CMR 6.14(4)(d)2. and disposed of in accordance with 453 CMR 6.14(4)(h).

(f) Clean-up. Following an Asbestos Response Action, the Asbestos Contractor or entity performing the work shall decontaminate all contaminated surfaces within the Work Area using HEPA vacuuming and/or wet cleaning techniques. All equipment and materials used and all surfaces from which ACM has been removed shall be decontaminated. An inch of soil shall be removed from dirt floors and disposed of as asbestos waste. All cleanup materials shall be disposed of as asbestos waste. Clean-up shall be to the level of no visible debris.

(g) Clearance Monitoring. Following the cleanup required by 453 CMR 6.14(4)(f), the facility owner, Asbestos Contractor or entity conducting the Asbestos Response Action, and/or the Asbestos Project Monitor employed to oversee the work operation shall ensure that the clearance monitoring requirements of 453 CMR 6.14(5) are met. Until these conditions are achieved all Work Area barriers shall remain in place, Work Area ventilation systems (if required) will remain in operation, respirators and other personal protective equipment shall be worn and all other work practice controls, as required by 453 CMR 6.14(4) shall remain in effect.

(h) Disposal Requirements.

1. Waste. Any ACM removed from a facility must be handled and disposed of as an asbestos waste in conformance with EPA NESHAPS Regulations at 40 CFR Part 61 and Massachusetts Department of Environmental Protection (DEP) Regulations 310 CMR 7.00, 18.00 and 19.00.

2. Transport. Only asbestos waste which has been properly containerized pursuant to 453 CMR 6.14(4)(d)2. shall be transported from the point of generation. Transport shall be in covered vehicles or locked containers. Transportation of asbestos waste shall be in conformance with EPA NESHAP Regulations at 40 CFR Part 61 and applicable standards of the US Department of Transportation, OSHA and the Massachusetts Department of Environmental Protection.

(5) Clearance Monitoring Procedures. The clearance monitoring procedures specified by 453 CMR 6.14(5)(a) and (b) shall be performed only by a certified Asbestos Project Monitor who is not an employee or Responsible Person of the Asbestos Contractor or entity which conducted the work. The Asbestos Contractor shall not subcontract with an Asbestos Project Monitor to perform the visual inspection required by 453 CMR 6.14(5)(a) or the clearance air monitoring required by 453 CMR 6.14(5)(b) for an Asbestos Response Action conducted in a facility subject to the requirements of AHERA.

(a) Visual Inspections. A certified Asbestos Project Monitor shall inspect all surfaces within the Work Area for dust, debris and other particulate residue. Should any Visible Debris be found in the Work Area, it shall be repeatedly cleaned by the Asbestos Contractor or entity performing the work in accordance with 453 CMR 6.14(4)(f) until the no visible debris criterion is achieved. Where clearance air monitoring is required by 453 CMR 6.14(5)(b), the achievement of the no visible debris criterion shall precede the collection of clearance air monitoring samples.

(b) Clearance Air Monitoring. The clearance air monitoring requirements of 453 CMR 6.14(5)(b) shall be met for all Asbestos Response Actions except those conducted in facilities not subject to the requirements of AHERA where the Glove Bag is used as the sole means of removal or repair.

1. Clearance Air Monitoring Requirements for Larger Asbestos Response Actions

Conducted in School Facilities Subject to AHERA. For Asbestos Response Actions conducted in school facilities subject to AHERA which involve the removal, encapsulation or enclosure of greater than 160 square feet or 260 linear feet of friable ACM, clearance air monitoring samples shall be collected and analyzed by transmission electron microscopy(TEM) as prescribed by Appendix A to Subpart E of 40 CFR part 763.

a. In addition to adhering to the above, the certified Asbestos Project Monitor shall use a rotameter or other appropriate flow measuring device, the calibration of which is traceable to a primary standard, to measure the air flow in the sampling train immediately prior to and immediately following the collection of the clearance air monitoring samples.

b. Air samples shall be collected using the aggressive sampling methods described in Appendix A of 40 CFR Part 763, Subpart E.

c. The analysis of all clearance air monitoring samples collected pursuant to the requirements of 453 CMR 6.14(5)(b)1. shall be analyzed by Asbestos Analytical Services certified and approved pursuant to 453 CMR 6.08.

d. Where clearance air monitoring samples are collected and analyzed pursuant to the requirements of 453 CMR 6.14(5)(b)1. an Asbestos Response Action shall be considered complete when the average concentration of asbestos in five air samples collected within the work area and analyzed by the TEM protocol described in Appendix A of 40 CFR Part 763, Subpart E, is not statistically different, as determined through application of the Z-test calculation found in that Appendix A, from the average asbestos concentration of five air samples collected at the same time outside the work area and analyzed in the same manner, and the average asbestos concentration of the three field blanks described in the same Appendix A of Subpart E, of 70 structures per square millimeter.

e. An action may also be considered complete if the volume of air drawn for each of the five samples collected within the work area is equal to or greater than 1,199 L of air for a 25 mm filter or equal to or greater than 2,799 L of air for a 37 mm filter, and the average concentration of asbestos as analyzed by the TEM method in Appendix A of 40 CFR Part 763, Subpart E, for the five air samples does not equal the filter background level of 70 structures per square millimeter.

f. Should the work area fail the clearance air testing requirements of 453 CMR 6.14(5)(b)1.d. or e., as applicable, it shall be repeatedly cleaned by the Asbestos Contractor or other entity performing the work as prescribed by 453 CMR 6.14(4)(f) until the requirements of 453 CMR 6.14(5)(b)1.d. or e. are met.

2. Clearance Air Monitoring Requirements for Smaller Asbestos Response Actions Conducted in School Facilities and Asbestos Response Actions of All Sizes Conducted in Non-School Facilities. For Asbestos Response Actions conducted in school facilities subject to AHERA which involve the removal, encapsulation or enclosure of 160 square feet (or less) or 260 linear feet (or less) of ACM, and for all Asbestos Response Actions conducted in all non-school facilities, clearance monitoring samples shall be collected and analyzed using either: (1) the transmission electron microscopy (TEM) method prescribed by 453 CMR 6.14(5)(b)1. or (2) the phase contrast microscopy method, NIOSH Analytical Method 7400. Where the TEM method of analysis is elected, the sampling, analysis, and clearance level requirements shall be as prescribed at 453 CMR 6.14(5)(b)1. and Appendix A to Subpart E of 40 CFR Part 763. Where the phase contrast microscopy method, NIOSH Method 7400, is used, clearance air monitoring samples shall be collected and analyzed as prescribed by the NIOSH 7400 Method and 453 CMR 6.14(5)(b)2.a. through d.

a. In addition to adhering to the above, the certified Asbestos Project Monitor shall use a rotameter or other appropriate flow measuring device, the calibration of which is traceable to a primary standard, to measure the air flow in the sampling train immediately prior to and immediately following the collection of the clearance air monitoring samples.

b. Air samples shall be collected using the aggressive sampling methods described in Appendix A of 40 CFR Part 763, Subpart E.

c. For facilities subject to the requirements of AHERA at least five samples, or one sample per room, whichever is greater, shall be collected and analyzed. For non-AHERA facilities at least one sample for each 500 linear/1000 square feet of asbestos or portion thereof, or one sample per room, whichever is greater, shall be collected and analyzed. The collection and analysis of all samples shall be in accordance with the NIOSH 7400 Method.

d. Where clearance air monitoring samples are collected and analyzed using phase contrast microscopy pursuant to this subsection, an Asbestos Response Action shall be considered complete when the concentration of asbestos in each of the air samples collected inside the contained work space is less than or equal to 0.010 fibers per cubic centimeter of air.

e. Should the work area fail the clearance air testing requirements of this subsection it shall be repeatedly cleaned by the Asbestos Contractor or other entity perfoming the work as prescribed by 453 CMR 6.14(4)(f) until the requirements of 453 CMR 6.14(5)(b)2.d. are met.

f. All analyses of clearance air monitoring samples by phase contrast microscopy pursuant to 453 CMR 6.14(5)(b)2. shall be performed by an Asbestos Analytical Service certified and approved pursuant to 453 CMR 6.08(1)(c).