|(a) General provisions. The following general work practices are minimum requirements for protection of public health, and do not constitute complete or sufficient specifications for an asbestos abatement project. More detailed requirements in plans and specifications for a particular abatement project, or requirements that address the unusual or unique circumstances of a project, may take precedence over the provisions of this section. The specifications written for the abatement project shall also include the required air clearance procedures. (1) Federal work practices for asbestos abatement are referenced in 40 Code of Federal Regulations (CFR) §61.145, Environmental Protection Agency (EPA) titled "Standard for Demolition and Renovation," as amended. (2) An asbestos project consultant, who is licensed under §295.47 of this title (relating to Licensure: Individual Asbestos Consultant), may specify work practices that vary from the requirements of this section as long as the work practices specified are at least as protective of public health and are clearly described in the project notification submitted to the Texas Department of Health (department). The burden of proof for establishing equivalent protection rests with the asbestos consultant. Alternative control methods as referred to in 29 CFR §1926.1101(g)(6), such as dry removal or no negative air, shall be reviewed and certified in writing as at least as protective of the public health as the standard method described in this section by a Certified Industrial Hygienist (CIH) or a Professional Engineer (PE) licensed in Texas and shall be approved in writing by the Chief of the Asbestos Programs Branch, Toxic Substances Control Division, prior to the start of abatement. An applicant should allow 30 days from the date of submitting an alternative control method until final department approval or denial is issued. (3) If asbestos-containing building material (ACBM) is to be removed or encapsulated, it must be within a regulated area. (4) Only licensed persons, responding emergency personnel (police, fire, EMS, etc.), specialists required for assistance as determined by the consultant, or appropriate governmental inspectors are allowed to enter the containment, decontamination, bag-out, and temporary storage areas. (b) Critical barriers. Regulated areas within which asbestos abatement is to be conducted shall be separated from adjacent areas by impermeable barriers such as plastic sheeting attached securely in place. All openings between containment areas and adjacent areas, including but not limited to windows, doorways, elevator openings, corridor entrances, ventilation openings, drains, ducts, grills, grates, diffusers, and skylights, shall be sealed. All penetrations that could permit air infiltration or air leaks through the barrier shall be sealed, with exceptions of the make-up air provisions and the means of entry and exit. (c) Movable objects. All movable objects shall be removed from the containment area. Cleaning of contaminated items shall be performed if the items are to be salvaged or reused. Otherwise, they shall be properly disposed of as asbestos waste. All non-movable objects that remain in the containment area shall be covered with a minimum of four-mil plastic sheeting, secured in place. (d) Floor and wall preparation. Floor sheeting shall completely cover all floor surfaces and consist of a minimum of two layers of sheeting with at least a dart impact of 270 grams and tear resistance of machine direction (M.D.) 512 grams and transverse direction (T.D.) of 2067 grams or at least six-mil true thickness. Floor sheeting shall extend up sidewalls at least 12 inches and be sized to minimize the number of seams. No seams shall be located at wall-to-floor joints. Sealing of all floor penetrations against water leakage is mandatory. Wall sheeting shall completely cover all wall surfaces and consist of a minimum of two layers of four-mil sheeting. Wall sheeting shall be installed so as to minimize joints and shall extend beyond wall/floor joints at least 12 inches. No seams shall be located at wall-to-wall joints. Where a fire hazard exists, all plastic sheeting will be certified by the Underwriters Laboratory (UL) as being fire retardant. Where feasible, when containment walls which exceed 260 linear feet must be constructed, a viewing window will be included in the wall for each 260 linear feet or fraction of that distance which will permit the viewing of at least 51% of the abatement work area. The window shall be constructed of plexiglass which measures approximately 18 inches by 18 inches. The bottom of the window will be at a reasonable viewing height from the outside floor. (e) Decontamination system. A worker decontamination system in the regulated area shall be used, consisting of a clean room, shower room, and equipment room, each separated from the other and from the containment area by airlocks accessible through doorways. Except for the doorways and the make-up air provisions for the containment, the worker decontamination system shall be sealed against leakage of air. All personnel must exit the containment area through the shower before entering the clean room. No asbestos-contaminated individuals or items shall enter the clean room. The abatement contractor shall ensure that workers and supervisors: (1) remove all gross contamination and debris from their protective clothing before leaving the containment area; (2) remove their protective clothing in the equipment room and deposit the clothing in impermeable bags or containers labeled in accordance with subsection (j)(1) of this section; (3) do not remove their respirators in the equipment room; (4) shower prior to entering the clean room; and (5) enter the clean room before changing into street clothes. (f) Heating, ventilation, and air conditioning system equipment (HVAC). All HVAC equipment in or passing through the work area shall be shut down, and preventative measures taken to prevent accidental start-ups. All intake and exhaust openings and any seams in system components shall be sealed with at least six-mil sheeting and/or tape. All old filters shall be disposed of as asbestos waste. (g) Warning signs. Danger signs in accordance with 29 CFR §1926.1101, shall be displayed, in both the Spanish and English languages, at all entrances to regulated areas, and on the outside of critical barriers. (h) High-efficiency particulate air (HEPA) cleaning. Except with prior written approval from the department, cleaning procedures shall use wet methods and HEPA vacuuming. A working HEPA vacuum shall remain on-site every day of the asbestos abatement activity, from the start date and through the completion date of the project, and the unit shall have proper HEPA filter(s) in place. (i) Containment-area ventilation. Units with HEPA filtration, and in sufficient number to provide a negative pressure of at least 0.02 inches of water column differential between the containment and outside, as measured by manometric measurements, and a minimum of four containment air changes per hour, shall be operated continuously for the duration of the project. The duration of the asbestos abatement project for the purpose of this requirement shall be considered from the time a regulated area is established through the time acceptable final clearance air-monitoring results are obtained in accordance with §295.58(i)(3) of this title relating to Operations: General Requirements for Public Buildings). These units shall exhaust filtered air to the outside of the building wherever technically feasible. (j) Requirements for removal. The requirements for removing ACBM are that: (1) all ACBM shall be adequately wetted prior to removal or other handling; the bags (or other suitable containers) of ACBM shall be marked per the applicable Occupational Safety and Health Administration (OSHA) and the National Emission Standards for Hazardous Air Pollutants (NESHAP) regulations and double bagged by placing asbestos-containing waste material into bags with true 6 mil thickness or may be placed in a bag or fiberboard drum that meets the following criteria: tear resistance of M.D. 300 grams, T.D. 2,068 grams, and dart impact of 216 grams. Documentation from the manufacturer shall be on site; (2) in order to double bag the asbestos-contaminated waste material, the inner bag shall be no more than half full, excess air must be evacuated out while in containment. The top of the inner bag must be twisted closed, folded over and sealed with duct tape. The inner bag must be rinsed off or HEPA vacuumed to remove asbestos contamination and placed inside another bag (or in a fiberboard drum). If an outer bag is used, excess air shall be evacuated while in containment and the outer bag twisted closed, the top folded over and sealed with duct tape; (3) the exterior bag or fiberboard drum shall have warning and generators labels applied as specified in 40 CFR §61.150(a)(1)(iv)-(v). Fiberboard drums shall require the application of a self-adhesive placard identifying the contents as asbestos-containing material. If a fiberboard drum is used, the top shall be sealed. It is a violation of these rules to have a container leak or break due to overfilling. Labeling of asbestos-containing waste material containers must be done prior to removal from the regulated area; (4) in the event of a bag or fiberboard drum leak, the drum or bag shall be placed into a third bag or wrapped in a minimum of one layer of 6-mil polyethylene plastic and be sealed and labeled as stated in subsections (j)(2) and (j)(3) of this section; (5) any additional bags or wrapping must be properly identified as being asbestos-contaminated and shall have proper generator labels attached; (6) labeling of asbestos-containing waste material containers must be done prior to removal from the regulated area; (7) asbestos-covered components that are going to be removed from the building may either be stripped in place and cleaned (and pass a visual inspection by the consultant), or the ACBM may be adequately wetted and the entire component wrapped in two layers of six-mil plastic or a single layer of plastic with a tear resistance of no less than M.D. 512 grams, T.D. of 2,068 grams, and a dart impact of no less than 297 grams as measured using American Society for Testing and Materials (ASTM) methods D1709, D1922, and D882, labeled and sealed, providing that: (A) components such as sections of metal lath that cannot be safely lowered to the floor shall be stripped in place; (B) any component that cannot be lowered or handled without presenting an excessive fiber release or safety hazard shall be stripped in place; (C) sharp edges of components shall be protected to preclude tearing the plastic wrapping and causing injury; and (8) ACBM shall be removed in small sections and containerized while wet. At no time shall material be allowed to accumulate on the floor or become dry. Structural components and piping shall be adequately wetted prior to wrapping in plastic sheeting for disposal; (9) proper temporary storage of asbestos-containing waste material shall be provided (e.g., a roll-off box, dumpster or storage room lined with plastic sheeting). Final disposal of asbestos-containing waste material shall be within 30 days of project completion or when receiving container is full, whichever is sooner. (k) Requirements for the encapsulation of ACBM. (1) Prior to encapsulation, loose and hanging ACBM shall be removed. (2) Filler material applied to gaps in existing material must contain no asbestos, shall adhere well to the substrate, and shall provide an adequate base for the encapsulating agent. (3) Encapsulant shall be applied using only airless spray equipment with the nozzle pressure and tip size set according to the manufacturer's recommendations. (4) Encapsulated materials shall be specifically designated by signs, labels, color coding, or some other mechanism to warn individuals who may in the future be required to disturb the material. (l) Requirements for the enclosure of ACBM. (1) Acceptable enclosure shall be airtight and of permanent construction, so that the area behind them is inaccessible. (2) All areas of ACBM shall be wetted if they are to be disturbed during the installation of hangers, brackets, or other portions of the enclosure. (3) Prior to enclosure, loose and hanging ACBM shall be removed. (4) Filler material applied to gaps in existing materials shall contain no asbestos, and shall adhere well to the substrate. (5) Enclosures for ACBM shall be specifically designated by signs, labels, color coding, or some other mechanism to warn individuals who may in the future be required to disturb the material. (m) Safety requirements. The following safety requirements shall be in effect for an abatement project: (1) Fire safety. A minimum of one fire extinguisher with a minimum National Fire Protection Association rating of 10BC (dry chemical) shall be placed within each abatement project containment for every 3,000 square feet, or fraction thereof, of containment area. Each fire extinguisher shall be maintained in a fully charged and operable condition. (2) Electrical safety. All active electrical service lines within the regulated and containment areas shall be connected through ground-fault circuit interrupter (GFCI) units. (3) Air monitoring. Air monitoring shall include personal samples according to 40 CFR Part 763, Subpart G or 29 CFR §1926.1101, base line sampling, area sampling, and clearance sampling according to §295.58(i) of this title.