Air Operating Permit - Puget Sound Clean Air Agency

II. MONITORING, MAINTENANCE, AND RECORDKEEPING Permit No. 13120Expiration Date: September 12,2013Page 210 of291acceptable limits established by Boeing or the filter manufacturer, as applicable,or the recorded water flow rate is less than or falls below the acceptable limitsestablished by Boeing or the booth manufacturer, as applicable, Boeing shallshut down the operation and take corrective action. The operation can bereswned when pressure drop or water flow rate is returned within the specifiedlimits. The corrective actions shall include investigating if the activity occurringat the time of the reading included activities regulated under 40 CFR 63.74S(g).Boeing shall asswne that the activity was regulated under 40 CFR 63.74S(g)unless Boeing can demonstrate by a preponderance of the evidence otherwise.Acceptable limits shall be documented on the log.[40 CFR 63.74S(g), 12/8/00]Under certain operating conditions such as clean filter and low air flows, thepressure drop across a spray booth filter may be zero inches of water. 17(iii) When the Aerospace NESHAP requires that the pressure drop across the exhaustfilters be monitored and recorded once per shift, the pressure drop range shall beestablished using either the manufacturer's recommendations or shall be basedon providing adequate air flow while maintaining filter integrity based on thespecific design of the system. If the manufacturer's recommendations are notutilized, the pressure drop shall be established as follows:(a) The low end of the range, with the exception of filter banks which have aclean filter pressure drop less than or equal to 0.03 inches of water, will beestablished at no less than SO percent of the clean filter value. For filter bankswhich have a clean filter pressure drop less than or equal to 0.03 inches of water,the low end of the range may be set at zero.(b) The high end will be established based on operational experience to allow foradequate air flow in the specific paint booth or hangar, but no higher than thepoint at which the filter will fail.17 May 20, 19991eller from Jay Willenberg, Puge! Sound Clean Air Agency, to Frank Migaiolo, Boeing.Boeing-Everett Permit, issued September 12, 2008; Administrative Amendment 3: October 10, 2012