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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 380. Department of Labor |
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Chapter 50. Abatement of Friable Asbestos Materials Rules |
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Subchapter 11. Laboratory Requirements |
SECTION 380:50-11-2. Clean-test requirements
Latest version.
- (a) After all abatement and cleanup procedures are concluded, a Clean Test shall be conducted to ensure cleanliness of the abatement area prior to re-occupancy of the abatement area.(b) Clean Test samples shall not be conducted until a visual inspection is performed by Oklahoma Department of Labor personnel.(c) Clean Test samples shall be by aggressive sampling techniques, the number and method of such tests to be specified by the project design.(1) For all projects, other than O&M, SSSD, or Class III, where less than 160 square feet or 260 linear feet of ACM or PACM has been removed:(A) A minimum of five (5) samples shall be run in a regulated area located in a public or commercial facility. Samples shall be analyzed by Phase Contrast Microscopy (PCM).(B) A minimum of five (5) samples shall be run in a regulated area located in a school facility as defined by AHERA. Samples shall be analyzed by Phase Contrast Microscopy (PCM).(2) For all projects, other than O&M, SSSD, or Class III, where 160 square feet or 260 linear feet or more of ACM or PACM has been removed:(A) A minimum of five (5) samples shall be run in a regulated area located in a public or commercial facility. Samples shall be analyzed by Phase Contrast Microscopy (PCM).(B) A minimum of five (5) samples shall be run in a regulated area located in a school facility as defined by AHERA. Samples shall be analyzed by Transmission Electron Microscopy (TEM).(3) Sample flow rates shall be limited to ten (10) liters per minute for 25-millimeter cassettes.(4) The minimum volume of air drawn for each Clean Test sample shall be 1,200 liters for a 25-millimeter cassette.(d) For the Clean Test to be approved using PCM analysis, the upper confidence limit of the airborne fiber concentration shall be less than 0.01 fibers per cubic centimeter.(e) For any PCM analysis exceeding the allowed Clean Test level for any cassette on a project not covered under AHERA regulations, the contractor may have such cassettes analyzed by TEM utilizing NIOSH Method 7402, in which case the asbestos fiber level shall be less than 0.01 fibers/cc for those fibers greater than five (5) micrometers.(f) For Clean Tests to be approved using TEM analysis, the average concentration of the five (5) air samples collected within the regulated area, shall be less than 70 structures per square millimeter.