Effective October 6, 2015, US EPA will list ASTM 1527-13 “Standard Practice for Environmental Site Assessments:  Phase I Environmental Site Assessment Process” as the primary industry standard that “may be used to comply” with the All Appropriate Inquiry (AAI) requirements in 40 CFR 312.20.  This is, according to US EPA’s final rule issued on October 6, 2014, … Continue Reading