This part of ISO 10381 provides guidance on the hazards that may exist during a site investigation and when collecting samples of soil and other ground material, including hazards that are intrinsic in the sampling operation in addition to the hazards that may arise from contamination and other physical hazards. Precautions are given so that the risks involved in any sampling or site investigation can be controlled and minimized. This part of ISO 10381 gives guidance on hazards which may be encountered in a site investigation — in general, — on agricultural areas, — on contaminated areas, — in geological investigations, and an indication of the activities which may give rise to risks. It then describes procedures which may be adopted to control risks. This part of ISO 10381 is designed specifically to deal with the problems of safety during sampling and site investigation, and is not intended to provide guidance for other situations such as construction. NOTE Former production sites for munitions and other warfare agents present special problems to investigators and others involved in handling samples collected at such locations. The guidance given in this part of ISO 10381 will be of assistance in these situations, but additional guidance on the precautionary measures to be taken should be obtained from the specialists responsible for the former operation of these sites.