BS 5930 Code of Practice for Ground Investigations has been amended. BS 5930:2015 +A1:2020 has just been published. The amendment contains the following main changes from BS 5930:2015.

1. Update to ground investigation and geotechnical design in accordance with the latest BS EN ISO test standards meaning that different methods of work should not have to be adopted when operating in different countries.
2. Update to description of soils and rocks in accordance with BS EN ISO 14688 (Book 3D7):
   • • • Geotechnical investigation and testing – identification and class of soil Pt 1. Identification and description and
       • Geotechnical investigation and testing – identification and class of soil Pt 2. Principles for a classification
3. and 14689 standards (Book 3D7):
   • • • Geotechnical investigation and testing – identification and class of rock (ISO 14689-2017)
4. Update to accommodate changes in BS EN ISO 17892 standards and related BS 1377 parts; more specifically:-.
   • • • Geotechnical investigation and testing- laboratory testing of soil Pt.1 Determination of water content
       • BS EN ISO 17892-2.2014 Geotechnical investigation and testing- Laboratory testing of soil Pt.2 Determination of bulk density
       • Geotechnical investigation and testing. Laboratory testing of soil. Determination of particle density
       • Geotechnical investigation and testing. Laboratory testing of soil. Determination of particle size distribution
       • Geotechnical investigation and testing. Laboratory testing of soil Incremental loading oedometer test
       • Geotechnical investigation and testing. Laboratory testing of soil. Pt 6 Fall cone test
       • Geotechnical investigation and testing. Lab testing of soil. Pt 7 Unconfined compression test
       • Geotechnical investigation & Lab Test of soil Part 8. Unconsolidated undrained triaxial test

Relating this information to BS 5930:2015 +A1:2020, the changes can be referenced as follows:

• • • Chapter	Topic	Pages
      5.3	New communication- Asbestos	12
      10	3 dimensional ground model reference	18
      14.2	Topographical mapping, imagery and 3D	24/25
      33.4.5	Anthropogenic ground (table 18)	112/113
      33.5	Name, age and type of geological unit	116
      36.2	Description of rock materials (table 25)	121
      36.2.6	Rock name (commentary)	125
      36.4.2.2	Weathering classification Figure 9	128/129
      44	Field Density, SRDs and Electrical test	148/149
      57.2	Screening of Laboratory Samples containing hazardous samples. Safe to test information	191
      61	Laboratory tests- General  (tables list)	194
      Table 37	Common Laboratory Tests for Soils (table) references	195-207
      Sect 10, 62	Reports, Interpretation, Notes and references	212
      63.2.3	Photography, imagery, format (samples etc.)	219
      Annex G 1.	Integrated field investigations (note)	261

In addition to this:

BS EN ISO 21365:2020 Soil Quality. Conceptual site models for potentially contaminated sites has been published and is available from the BSI bookshop.

1 Scope
This document provides guidance on developing and using conceptual site models (CSMs) through the various phases of investigation, remediation (if required), and any subsequent construction or engineering works.
It describes what CSMs are, what they are used for and what their constituents are. It stresses the need for an iterative and dynamic approach to CSM development.
This document is intended to be used by all those involved in developing CSMs and by those who rely on using them such as regulators, landowners, developers, and the public (and other relevant parties). Ideally, this includes representatives from all phases of the investigative and remedial processes, for example, preliminary assessment, detailed investigation, baseline human health and environmental risk assessments, and feasibility study, and, any subsequent construction or engineering work.

NOTE 1 This document is applicable whenever the presence of “potentially harmful” or “hazardous” substances are present irrespective of whether they are naturally occurring or present due to human activity (i.e. are “contaminants”).

NOTE 2 Although most of the principles described for developing CSMs in this document can apply to other domains, such as groundwater resources management, the present document is specifically written for the management of potentially contaminated sites or known contaminated sites.