many customers have email thanking us for producing both of these extremely helpful books. Many state that they passed the first time they took their certification exam. Others thanked us for making the math problems very easy to understand, while others tell us it's a wonderful resource in the work place. --multiple customer reviews
About the Author
The combined efforts of seven, well recognized professionals produced this book. Many of these authors were part of the faculty for advanced safety and Industrial Hygiene courses at the Harvard School of Public Health. It was clear from these courses and through interaction with other professionals in the field, that there is a need for a direct straight forward approach to learning and using the myriad of calculations associated with safey and industrial hygiene.