1. (1) Establishment and isolation of regulated abatement work area. The immediate work area shall be considered to be the area from which the asbestos containing materials are actively being removed. The asbestos project regulated abatement work area shall extend 25 feet from the perimeter of the immediate work area and shall have signage in accordance with section 56-7.4 of this Part. An airlock shall be required at the entrance to the regulated abatement work area to serve as a changing area, if the workers shall have to pass through enclosed publicly occupied space, such as from a roof through an interior stairway, to access the decontamination units.

   1. (i) Where the asbestos project regulated abatement work area extends outward 25 feet and extends downward one floor to encompass a passage or vehicular door which must be used for either a primary entrance or by an emergency vehicle thereby precluding sealing such door, a tunnel structure (with sides and roof) built of plywood sheeting, covered with at least two layers of at least six mil plastic, shall extend outward 25 feet horizontally from the line of vertical projection of the roof edge downward to grade level.
2. (2) Preliminary preparation. Regulated abatement work area preparation shall also comply with sections 56-7.2, 56-7.3, 56-7.4, 56-7.5, 56-7.6, 56-7.7 and 56-7.9 of this Part.
3. (3) Decontamination system location. The personal decontamination system enclosures can be remote but must be within 50 feet of the building/structure entrance used by the asbestos handlers (workers), and shall be removed only after obtaining satisfactory clearance air results for the regulated abatement work area or an acceptable visual inspection has determined that the abatement is complete, as per section 56-9.2(e) of this Part.

4. (4) Critical barriers. Prior to the placement of critical barriers, affected surfaces shall be pre-cleaned using HEPA-filtered vacuum equipment and wet cleaning methods. All openings within the regulated abatement work area shall be sealed with critical barriers installed as per section 56-7.11(a) of this Part, prior to beginning Phase II B activity on the project. The critical barriers shall be removed only after satisfactory clearance air sampling results have been obtained or the asbestos project is complete. The requirements of section 56-7.11(b)-(e) of this Part do not apply. Additional requirements are as follows:

   1. (i) All openings (including operable windows, doors, ducts, grilles, communicating openings, etc.) one story above and one story below the roof level of the regulated abatement work area (this includes any building/structure within 25 feet of the immediate work area), shall be sealed directly with two layers of at least six mil flame-retardant plastic sheeting. All vent openings which cannot be sealed shall be extended vertically a minimum of eight feet and remain in operation.
   2. (ii) A polyethylene drape or curtain may be used instead of plasticizing the windows individually. The drape may be removed after the asbestos project is complete.
   3. (iii) The drape or curtain, if used, shall be made of two layers of a continuous 18-foot curtain (drape) of at least six mil plastic hung from the top of the wall or parapet. The plastic curtain shall be secured using nailer strips and ram set charges or other methods approved by the project supervisor. The bottom of the plastic curtain shall be sufficiently weighted or anchored to prevent lifting due to winds. Curtain seams shall overlap at least 12 inches and be sealed with duct tape front and back. The curtain ends and each seal shall be reinforced by stapling furring strips to the plastic. The plastic curtain shall extend a minimum of 15 feet beyond the last opening within 25 feet of the regulated abatement work area. When removed, the plastic curtain shall be disposed of as asbestos waste.
   4. (iv) Any windows on the floor below or above and within 25 feet of the immediate work area need to be plasticized, but if safety reasons dictate, they may be plasticized from inside the building/structure.

   5. (v) Any fixed or non-operable windows on the floor below or above and within 25 feet of the immediate work area need not to be plasticized, but shall be sealed using caulking or duct tape.

      Facades:

   6. (vi) Removals without tents will require plasticizing or sealing of nearby windows within 25 feet of the immediate work area, placement of dropcloths, plasticizing of a man-lift or scaffolding and other operational safeguards as outlined below.
   7. (vii) For larger work area removals, any operable windows or openings to the building at the work level or on the floor below within 25 feet of the immediate work area shall be plasticized with two layers of six mil fire-retardant polyethylene sheeting. The windows can be plasticized outdoors, or for reasons of safety, from the indoors. Window, door and louver units subject to complete removal must have their openings plasticized at the interior of the building. Windows that are fixed or non-operable and will remain sealed airtight for the duration of abatement activities, do not require installation of critical barriers.

   8. (viii) Under areas where non-friable materials are removed without tents, a dropcloth, made of six mil fire-retardant polyethylene sheeting, shall be placed on the ground below the work area to prevent spread of any ACM remnants. This dropcloth shall be a minimum of 10 feet wide with an additional 10 feet of width for every floor above a first floor level where removal work will take place, up to a maximum of 30 feet of width measured perpendicular to the building/structure. In addition, if a straight scaffolding, man-lift, swing scaffolding or similar equipment is used for areas above the first floor, the lift/scaffolding unit shall be plasticized with two layers of six mil fire-retardant polyethylene on the platform proper, with plastic sheeting extended vertically to waist-high (as so equipped) guardrail sides and back of the lift unit. While the platform/lift walking surfaces must be plasticized, the asbestos abatement contractor must provide proper traction surfaces or equipment to assure the safety and comfort of abatement workers while performing abatement activities on the lift/scaffold equipment. After non-friable ACM is removed from each work location, the platform and plasticized surfaces toward the building shall be wet wiped and/or HEPA vacuumed clean before reuse. The plasticizing on the lift or scaffolding shall be periodically inspected during use and repaired as needed.

      (c) Removal.

      Removal of ACM shall utilize manual wet methods for all non-friable ACM removals, and rotating blade roof cutters for roofing removals, as applicable. In no event shall methods be used that may render the ACM friable.

   Roofs:

5. (1) Residual non-friable ACM will be wet scraped and HEPA vacuumed. Materials removed shall be containerized or immediately wrapped in two layers of six mil fire-retardant plastic sheeting and secured air tight prior to transport to the waste decontamination facility.
6. (2) Under facade areas where non-friable ACM is to be removed without tents, whenever possible, an asbestos handler (worker) with a HEPA vacuum will position the vacuum hose within four inches of the material being removed to capture small pieces of non-friable ACM and asbestos fines. The hose end will be positioned so that as many smaller pieces of material as possible will fall into the vacuum hose end. Larger pieces of ACM should be immediately bagged or containerized.
7. (3) Asbestos containing materials will not be allowed to accumulate in the work area or on the drop cloth.

8. (4) In lieu of using an exterior chute as per section 56-8.4(g) of this Part, waste bags and containers may be lowered to the waste trailer/dumpster by crane or hoist using a temporary waste transfer container of adequate size and strength.

   (d) Clean-up procedures during abatement.

   The following clean-up procedures shall be performed during abatement.

9. (1) Visible accumulations of loose asbestos containing waste material shall be cleaned up using rubber or plastic dustpans and rubber squeegees or HEPA-filtered vacuums. Metal shovels may also be used except in the vicinity of plastic sheeting, critical barriers and isolation barriers, which could be perforated by these tools. To pick up excess water and gross wet debris, a wet-dry shop HEPA vacuum dedicated to asbestos abatement may be used. This cleaning shall be done whenever there is sufficient asbestos waste material to fill a single leak- tight bag/container, or this cleaning shall be done at the end of each work shift whichever shall occur first. Visible debris shall be maintained adequately wet.

10. (2) Work shall stop whenever excessive water accumulation or flooding is present in the area and shall not resume until the water is collected and disposed of properly.

    (e) Final cleaning and clearance procedures.

    Final clean-up and clearance procedures for abatement shall comply with Subpart 56-9 of this Part, except that only one stage of cleaning (final) is to be performed. Lockdown encapsulant use is not required.

11. (1) Exemption from project monitor visual inspection. Asbestos projects which are exempt from clearance air sampling requirements at one- or two-family owner occupied residential buildings/structures, are also allowed an exemption from the project monitor visual inspection requirements. For asbestos projects utilizing this exemption, once final cleaning is complete, a visual inspection shall be completed by the supervisor to confirm that the scope of abatement work for the asbestos project is complete, and no visible debris/residue, pools of liquid, or condensation remain. The results of this inspection shall be documented by the supervisor in the asbestos abatement contractor daily project log, and once the asbestos project is complete the supervisor shall also obtain the owner's written acceptance of the final results of the asbestos project within the daily project log.

    (f) Final waste removal from the site.

    The requirements of Subpart 56-10 of this Part shall apply, once all asbestos project regulated abatement work areas have been completed.

The following Phase II abatement procedures shall apply for exterior removal of non-friable asbestos-containing roofing, siding, caulking, glazing compound, transite, tars, sealers, coatings, and other NOB ACMs, currently in a non-friable intact condition, unless the ACM is rendered friable during removal or debris falls within the building/structure. The asbestos project shall then be completed in accordance with all requirements of this Part, except special project of this Subpart.

(a) Air sampling and analysis.

Air sampling and analysis on asbestos projects conducted under this section is not required unless the ACM is rendered friable during removal or debris falls inside the building/structure. Air sampling and analysis shall then be conducted in accordance with the requirements of Subpart 56-4 of this Part.

(b) Regulated abatement work area preparation.