Name the four principles of odor control {Ans: remove the source, clean, penetration, and sealing surfaces}___________ and ________ are two commonly found invisible safety hazards to be aware of within older structures. {Ans: Lead, Asbestos}From a common sense perspective, safety on the job site is the responsibility of _______________. {Ans: everyone}What does NADCA stand for? {Ans: National Air Duct Cleaning Association.}When planning to clean and deodorize smoke damaged light fixtures, a safety step before processing with cleaning is to _______ _______ electrical power. {Ans: turn off}Areas that need to be cleaned when processing a _________ ________ system include; interior and exterior of exhaust vents and replacing or cleaning filters. {Ans: kitchen ventalations}Oils, gels or solids that are impregnated with fragrances, which prolong the evaporation of deodorant vapors, are classified as ___________ __________. {Ans: masking agents}A ________ ________ is a malfunction of an oil-fired heating system with attached ducting. {Ans: puff back}Hydroxyls are manufactured by generators, where _________ light combines with water vapor produces hydroxyl molecules. {Ans: ultraviolet}The source area or room is where deodorization efforts ________. {Ans: begin}As soot particles combine with atmospheric water vapor, it becomes ___________. {Ans: