Throughout the following tutorial you are expected to read further on around the legislation for each area. The tutorials will only serve to provide basic knowledge on the subject. A very useful book that will fill in the basic detail, history and future for the legislation outlined below is the NSCA's Pollution Control handbook. The following Units (4 and 5) are designed to give you a better insight into the current legislation affecting your business and Unit 6 will provide you with the opportunity to apply this knowledge in a practical way.