Symbols

Symbols. Symbols. The symbols used in this subchapter have the following meanings: (1) “ac” means after the control system is installed and operated. (2) “A k ” is the area of each natural draft opening k in a total enclosure, in square meters. (3) “bc” means before control. (4) “C aj ” is the concentration of VHAP in gas stream j exiting the control device, in parts per million by volume. (5) “C bi ” is the concentration of VHAP in gas stream i entering the control device, in parts per million by volume. (6) “C c ” is the VHAP content of a finishing material c in kilograms of VHAP per kilogram of coating solids (kg VHAP/kg solids), as supplied. Also given in pounds of VHAP per pound of coating solids (lb VHAP/lb solids). (7) “C di ” is the concentration of VHAP in gas stream i entering the control device from the affected source, in parts per million by volume. (8) “C fk ” is the concentration of VHAP in uncontrolled gas stream k emitted directly to the atmosphere from the affected source, in parts per million by volume. (9) “E” is the emission limit achieved by an emission point or a set of emission points, in kg VHAP/kg solids (lb VHAP/lb solids). (10) “F” is the control device efficiency, expressed as a fraction. (11) “FV” is the average inward face velocity across all natural draft openings in a total enclosure, in meters per hour. (12) “G” is the VHAP content of a contact adhesive, in kg VHAP/kg solids (lb VHAP/lb solids), as applied. (13) “M c ” is the mass of solids in finishing material c used monthly, kg solids/month (lb solids/month). (14) “N” is the capture efficiency, expressed as a fraction. (15) “Q aj ” is the volumetric flow rate of gas stream j exiting the control device, in dry standard cubic meters per hour. (16) “Q bi ” is the volumetric flow rate of gas stream i entering the control device, in dry standard cubic meters per hour. (17) “Q di ” is the volumetric flow rate of gas stream i entering the control device from the emission point, in dry standard cubic meters per hour. (18) “Q fk ” is the volumetric flow rate of uncontrolled gas stream k emitted directly to the atmosphere from the emission point, in dry standard cubic meters per hour. (19) “Q in i ” is the volumetric flow rate of gas stream i entering the total enclosure through a forced makeup air duct, in standard cubic meters per hour, wet basis. (20) “Q out j ” is the volumetric flow rate of gas stream j exiting the total enclosure through an exhaust duct or hood, in standard cubic meters per hour, wet basis. (21) “R” is the overall efficiency of the control system, expressed as a percentage. (22) “S” is the VHAP content of a solvent, expressed as a weight fraction, added to finishing materials. (23) “W” is the amount of solvent, in kilograms (pounds), added to finishing materials during the monthly averaging period.