Air Operating Permit - Puget Sound Clean Air Agency

II. MONITORING, MAINTENANCE, AND RECORDKEEPING Permit No. 13120Expiration Date: September 12, 2013Page 226 of291(y) Reinforced Plastic Composites NESHAP Weighted AverageEmission Factor OptionEach month calculate the weighted average organic HAP emissions limit for all openmolding operations and the weighted average organic I-lAP emissions limit for allcentrifugal casting operations for the last l2-month period to determine the organic HAPemissions limit that must be met. To do this, multiply the individual organic HAPemissions limits in Table 3 or 5 to Subpart WWWW for each open molding (centrifugalcasting) operation type by the amount of neat resin plus or neat gel coat plus used in thelast 12 months for each open molding (centrifugal casting) operation type, sum theseresults, and then divide this sum by the total amount of neat resin plus and neat gel coatplus used in open molding (centrifugal casting) over the last 12 months as shown inEquation 3 below.Equation 3:£ (ELi * MaterialJWeighted Avg Emiss Limit = .'-i =--,-1 ~~~~_Where:nL Materialii = IELi = organic HAP emissions limit for operation type i, Ibs/ ton from Tables 3, or 5 to Subpart WWWWMateriali ~ neat resin plus or neat gel coat plus used during the last 12-month period for operation type i,tonsn = number of operations[40 CFR 63.58l0(c)(1), 8/25/05]Each month calculate the weighted average organic HAP emissions factor for openmolding. To do this, multiply the actual open molding operation organic HAP emissionsfactors and the amolmt of neat resin plus and neat gel coat plus used in each openmolding operation type, sum the results, and divide this sum by the total amount of neatresin plus and neat gel coat plus used in open molding operations as shown in Equation 4below.Equation 4:Boeing-Everett Permit, issued September 12, 2008; Administrative Amendment 3: October J 0, 20 J 2