Standard Interpretations - Table of Contents|
| Standard Number:||1910.107(d)(9)|
(a) Solid particulates have been removed from the recirculated air.Also, subsection 5.5.2 allows, "recirculated air to occupied spaces," including spray areas, spray booths, spray rooms, and other process areas, but states that, "other requirements addressing the toxicity and the permissible exposure limits," such as ANSI Z9.7, Recirculation of Air from Industrial Process Exhaust Systems, will also apply. According to ANSI Z9.7, "the potential for return of toxic contaminants to the facility through recirculation of industrial process air requires that this process be thoroughly analyzed and well-designed." This ANSI standard also lists several other standards and information which you may wish to review.
(b) The concentration of vapors in the exhaust airstream does not exceed 25 percent of the lower flammable limit.
(c) Listed equipment is used to monitor the concentration of vapors in all exhaust airstreams.
(d) An alarm will sound and the spray operation will automatically shut down if the concentration of any vapor in the exhaust airstream exceeds 25 percent of the lower flammable limit.
(e) Equipment installed to process and remove contaminants from the air exhausted from spray operations is approved by the authority having jurisdiction."
|Standard Interpretations - Table of Contents|