New Hampshire Code of Administrative Rules
Lab - Commissioner, Department of Labor
Chapter Lab 1400 - SAFETY AND HEALTH OF EMPLOYEES
Part Lab 1403 - RULES FOR EMPLOYEE SAFETY AND HEALTH
Section Lab 1403.56 - Spray Finishing Operations

(a) In conventional dry type spray booths, over-spray dry filters or filter rolls shall ensure an average air velocity over the face of the booth of not less than 100 linear feet per minute;

(b) Electrostatic spraying operations shall be conducted with an air velocity of not less than 60 linear feet per minute, or more, depending on the volume of the finishing material being applied and its flammability and explosion characteristics ;

(c) Visible gauges or an audible alarm or pressure-activated devices shall be installed to indicate or ensure that the required air velocity is maintained;

(d) Filter pads shall be inspected, and clogged filter pads discarded, and replaced. Filter rolls shall be inspected to ensure proper replacement of filter media;

(e) Spray booths shall be so installed that all portions are readily accessible for cleaning;

(f) A clear space of not less than 3 feet on all sides of a spray booth shall be kept free from storage or combustible construction;

(g) There shall be no open flame or spark producing equipment in any spraying area nor within 20 feet thereof, unless separated by a partition capable of stopping vapor travel;

(h) Electrical wiring and equipment not subject to deposits of combustible residues but located in a spraying area shall be of explosion proof type;

(i) The quantity of flammable or combustible liquids kept in the vicinity of spraying operations shall be the minimum required for operations and shall not exceed a supply for one day or one shift;

(j) Whenever flammable or combustible liquids are transferred from one container to another, both containers shall be bonded and grounded to prevent discharge sparks of static electricity;

(k) All spraying areas shall be kept as free from the accumulation of deposits of combustible residues as practical, with cleaning conducted daily if necessary. Scrapers, spuds, or other such tools used for cleaning purposes shall be of nonspark material;

(l) Residue scrapings and debris contaminated with residue shall be immediately removed from the premises; and

(m) "No Smoking" signs in large letters on contrasting color background shall be conspicuously posted at all spraying areas and paint storage rooms.