1.1''Purpose'''The purpose of this practice is to define good commercial and customary practice in the United States of America for conducting an environmental site assessment2 of a parcel of commercial real estate with respect to the range of contaminants within the scope of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (42 U.S.C. '''''9601) and petroleum products. As such, this practice is intended to permit a user to satisfy one of the requirements to qualify for the innocent landowner, contiguous property owner, or bona fide prospective purchaser limitations on CERCLA liability (hereinafter, the '''landowner liability protections,''' or '''LLPs'''): that is, the practice that constitutes all appropriate inquiries into the previous ownership and uses of the property consistent with good commercial and customary standards and practices as defined at 42 U.S.C. '''''9601(35)(B). (See Appendix X1 for an outline of CERCLA'''s liability and defense provisions.) Controlled substances are not included within the scope of this practice. Persons conducting an environmental site assessment as part of an EPA Brownfields Assessment and Characterization Grant awarded under CERCLA 42 U.S.C. '''''9604(k)(2)(B) must include controlled substances as defined in the Controlled Substances Act (21 U.S.C. '''''802) within the scope of the assessment investigations to the extent directed in the terms and conditions of the specific grant or cooperative agreement. Additionally, an evaluation of business environmental risk (BER) associated with a parcel of commercial real estate may necessitate investigation beyond that identified in this practice (see 1.4 and Section 13).

1.2''Objectives'''Objectives guiding the development of this practice are (1) to synthesize and put in writing good commercial and customary practice for environmental site assessments for commercial real estate; (2) to facilitate high quality, standardized environmental site assessments; (3) to provide a practical and reasonable standard practice for conducting all appropriate inquiries; and (4) to clarify an industry standard for all appropriate inquiries in an effort to guide legal interpretation of the LLPs.

1.3''Units'''The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4''Considerations beyond Scope'''The use of this practice is strictly limited to the scope set forth in this section. Section 13 of this practice identifies, for informational purposes, certain environmental conditions (not an all-inclusive list) that may exist at a subject property that are beyond the scope of this practice, but may warrant consideration by parties to a commercial real estate transaction. The need to include an investigation of any such conditions in the environmental professional'''s scope of services should be evaluated based upon, among other factors, the nature of the subject property and the reasons for performing the assessment (for example, a more comprehensive evaluation of business environmental risk) and should be agreed upon between the user and environmental professional as additional services beyond the scope of this practice before initiation of the environmental site assessment process.

1.5''This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project'''s many unique aspects. The word '''Standard''' in the title means only that the document has been approved through the ASTM consensus process.

1.6''This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7''This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.