Since the first edition of this book was published in 1994, state and federal agencies have increased enforcement of their hazardous waste disposal laws in laboratories. The enforcement actions resulting from these inspections have changed the perspective of many hazardous waste managers about what constitutes a "compliant program". These changes have prompted the preparation of this 2nd Edition. This revision is intended to provide all levels of laboratory staff a guide for managing laboratory chemical wastes in compliance with federal and state environmental regulations. New chapters have been added, all have been updated, and additional resources have been included to address changes in regulations and regulatory interpretations.