ASTM E2137-17

4.1 Use—The standard is intended for use on a voluntary basis by an estimator of costs and liabilities for environmental matters. The user may elect to apply this standard for any or all uses outlined in the Purpose. Application of this standard for one use does not compel application of the standard for all or any other use.

4.2 Principles—The following principles are an integral part of this standard and should be used to resolve ambiguity or dispute regarding the interpretation of estimated 4.2.1 Caution When Repurposing Estimates—The 4.2.2 Uncertainty Not Eliminated—Even though an estimate of 4.2.3 Periodic Review of Assumptions and Estimates—Assumptions underlying estimates should be reviewed, documented and periodically analyzed for the purpose of incorporating new information. There is a preference for current information over historical assumptions if the current information is comprehensive and comparable. Subsequent improvements in estimates should be made as more information becomes available, or as 4.2.4 Comparison with Subsequent Estimates—Subsequent estimates based on additional information should not be construed as indicating the prior estimates of 4.2.5 Not Exhaustive—Estimation of costs and liabilities for environmental matters does not necessarily require an exhaustive evaluation of all possible outcomes. A point exists at which the cost of obtaining information or the time required to gather it outweighs improvement in the quality of the estimate.

4.2.6 Assessment of Risk—The actual or potential risk to human health and the environment should be considered in assessing environmental matters. The degree of risk should be a factor in developing the cost and liability estimates associated with those matters.

4.2.7 Estimator Selection—An appropriate 1.1 Purpose—The purpose of this document is to provide a standard guide for good commercial and customary practice in estimating costs and liabilities for environmental matters.1.2 Objectives—The objective of this standard is to provide guidance on approaches for estimating costs and liabilities for environmental matters.

1.3 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.