Q768. What types of instruments are permissible for use in detecting equipment leaks and through valve leakage in Subpart W?

A768. For conducting leak detection required by subpart W, reporters have the option to use optical gas imaging instruments, infrared laser beam illuminated instruments, or acoustic leak detection devices as outlined in 40 CFR 98.234(a).  In addition, reporters may use other instruments, however those instruments must comply with the provisions as stated in 40 CFR 98.234(a)(2).

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