Legal Proceedings and Contingent Liabilities (Tables)

12 Months Ended

May 31, 2012

Employee Exposure Standards by Regulatory Agencies

The SCAQMD compared the level of exposure at the air monitor on our property line with the following employee exposure standards established by regulatory agencies:

Occupational Safety and Health Administration	5,000 ng/m³
National Institute for Occupational Safety and Health	1,000 ng/m³
California Environmental Protection Agency	200 ng/m³