DNS/ISO 18400-204:2017

Soil quality -- Sampling -- Part 204: Guidance on sampling of soil gas

Committee: SLBS TC 05
Status: Public comments
Start date: 20191014
End date: 20200113

ISO 18400-204:2017 contains guidance on soil gas sampling using
– active sampling (adsorbents, filters, air containers), and
– passive sampling
applied at permanent or temporary monitoring wells or other installations in soils or underneath buildings (sub-slab).
It provides guidance on:
– development of a sampling plan;
– construction of monitoring installations;
– transport, packaging and storage soil gas samples;
– quality assurance.
ISO 18400-204:2017 also gives basic information about
– soil gas dynamics, and
– identification of soil gas sources
relevant to permanent or temporary boreholes in soils or underneath buildings (sub‑slab).
The compounds covered by this document are:
. volatile organic compounds (VOCs);
. inorganic volatile compounds (e.g. mercury, HCN);
. permanent gases (i.e. CO2, N2, O2, CH4).
ISO 18400-204:2017 does not give guidance on:
– risk evaluation and characterization;
– selection and design of protective measures;
– the verification of protective measures, although the site investigation methodologies described can be used when appropriate;
– the sampling of atmospheric or indoor gases;
– the measurement of gases from the soil entering into the atmosphere;
– monitoring and sampling for radon.

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