1.1本指南涵盖了在对商业地产地块进行第二阶段环境现场评估（ESA）时采用良好商业惯例的框架，该评估涉及CERCLA范围内的一系列污染物以及石油产品的潜在存在。

1.1 This guide covers a framework for employing good commercial and customary practices in conducting a Phase II environmental site assessment (ESA) of a parcel of commercial property with respect to the potential presence of a range of contaminants which are within the scope of CERCLA as well as petroleum products.