OLYMPUS DIGITAL CAMERADuffield Associates’ Environmental Group has performed hundreds of Phase I and Phase II Environmental Site Assessments (ESA) in general accordance with prevailing standard practices established by the American Society for Testing and Materials (ASTM).  Our Phase I ESA reports are state-of-the-art and we were among the first consulting companies in the Northeast to recognize and discuss environmental business risk.  We are certified by DNREC to perform all forms of evaluations, testing, and remediation as a HSCA consultant.  In addition, we are certified by the State of Delaware as an Asbestos Professional Service Firm.