In Germany, the law dictates an ESA, but the assessment is done according to Local norms and legislation and the qualifications of assessors is deturmined also by Local norms and legislation.

"The Phase I ESA must be in compliance with ASTM Standard E1527-05. This standard also defines the qualifications of the environmental professional who conducts the assessment. "

I don't have this standard, yet. Could some please elaborate as to what the qualifications are, because I would attempt to submit the site assesment in German together with a translation to fullfill this prerequisite by including an additional section to show that the assessment meets the requirements of the American Standard.