1. Scope
1.1 Purpose This practice covers standardized techniques for actively collecting soil gas samples from the vadose zone beneath or near dwellings and other buildings. 1.2 Objectives Objectives guiding the development of this practice are: (1) to synthesize and put in writing good commercial and customary practice for conduct of soil gas sampling, (2) to ensure that the process for collecting soil gas samples is practical and reasonable, and (3) to provide an industry standard for soil gas sampling performed in support of vapor intrusion evaluations. 1.3 This practice allows a variety of techniques to be used for collecting soil gas samples because different techniques may offer certain advantages for specific applications. Three techniques are presented: sampling at discrete depths, sampling over a small screened interval, and sampling using permanent vapor monitoring wells. 1.4 Some of the recommendations require knowledge of pressure differential and tracer gas concentration measurements. 1.5 This practice does not address requirements of any federal, state or local regulations and/or guidance with respect to soil gas sampling. Users are cautioned that federal, state, and local guidance may impose specific requirements that differ from those of this practice. The values stated in SI units are to be regarded as the standard. 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 and health practices and determine the applicability of regulatory limitations prior to use. 1.7 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 projects many unique aspects. The word Standard in the title means only that the document has been approved through the ASTM consensus process.
Keywords
soil gas, vadose zone, sample measurement, vapor intrusion, volatile organic compounds
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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