Effective November 2006, buyers of commercial real estate have new liability protections against hazardous substances contamination on their property-even if they know about it at the time of purchase-provided they conduct all required research under the Environmental protection Agency's (EPA) new All Appropriate Inquiries Final Rule. <i>Commercial Landowner CERCLA Liability Protection</i> provides a comprehensive examination of the new EPA Final Rule and compares the new EPA rule to the previous Phase I All Appropriate Inquiry Standard Practice established by ASTM.