The Aerospace NESHAP addresses paint gun cleaning and provides four options which are intended to reduce HAP emissions (and VOC emissions) due to paint gun cleaning. These options are Option 1: Enclosed System [63.744(c)(1)(i)] * clean spray gun in an enclosed system that is leak checked on a monthly basis. Enclosed systconsits of forcing cleaning solvent through the gun. Option 2: Nonatomized Cleaning [63.744(c)(20] * without the use of atomizing air, clean the spray gun by placing cleaning solvent into a pressure pot and forcing the solvent through the spray gun into a waste container that is closed when not in use Option 3: Disassembled Gun Cleaning [63.744(c)(3)] * clean the disassembled spray gun by hand or by soaking in a vat that is closed when not in use or during soaking Option 4: Atomized Cleaning [63.744(c)(4)] * force cleaning solvent through the gun and spray directly into a waste container that is fitted with a device to capture the atomized solvent These options were extracted from the Aerospace NESHAP Summary of Requirements document located at URL http://www.epa.gov/ttn/uatw/aerosp/aeroimp.pdf. In addition, the use of an aqueous cleaner would obviously be an improvement. This might cause problems with the steel (due to oxidation, rust) but a rust inhibitor in the cleaner would probably solve any oxidation problem for a short time. Use of water based/water cleanup paints would allow the guns to be cleaned with water and would even eliminate the VOC/HAP emissions due to painting. Hope some of this works or at least gives you some other ideas to try. > ---------- > From: Tammy Allen[SMTP:tallen@co.pinellas.fl.us] > Sent: Friday, April 21, 2000 3:20 PM > To: p2tech@great-lakes.net > Subject: Paint gun washing and metal cleaning > > > Does anyone have an idea of what can be substituted for lacquer thinner > that is used for cleaning paint guns and steel parts that will be painted. > I have a business that contacted me who would like to eliminate/reduce > their VOC emissions and HAPs from paint gun cleaning operations and metal > cleaning (predominantly steel). > > Tammy L. Allen > Senior Environmental Specialist > Pinellas County Environmental Management > 512 S. Ft. Harrison Ave. > Clearwater, FL 33763 > > (727) 464-4761 > Fax (727) 464-3174 > > e-mail: tallen@co.pinellas.fl.us >
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