(1) Number and location of samples — large asbestos projects. A minimum of five samples shall be taken on a daily basis. The locations of samples to be taken are the same as specified for Phase II A. (See section 56-7.1 and table 2 within section 56-4.9 of this Part.)

(2) Work stoppage criteria during Phase II B abatement procedures. If air samples collected outside the regulated abatement work area, indicate airborne fiber concentrations at or above 0.01 fibers per cubic centimeter, or the established background level, whichever is greater, work shall stop immediately for inspection and repair of barriers and negative air ventilation systems as necessary. Clean up of surfaces outside of the regulated abatement work area using HEPA-vacuums and wet-cleaning methods shall be performed prior to resumption of abatement activities. A summary of clean up activities and the results of barrier inspections including any necessary repairs, shall be documented in the supervisor's daily project log. Work methods shall be altered accordingly to reduce fiber concentrations to acceptable levels.