Provides industrial hygienists with a reference containing the equations, conversions, and formulas they encounter in their day-to-day duties. It also includes business economic case studies demonstrating how to preserve your clients' financial resources, promote industrial hygiene, foster worksite safety, learn the financial ropes of business economics, and help control your clients' potential adverse environmental impact. It details real-world applications of good numbers to foster improvements in industrial hygiene, preventing inhalation toxicity and promoting better environmental air quality.