confidence is desirable, for example, unpaved areas or garden areas where an exposure pathway is complete. Selecting an appropriate sized hotspot, and determining the number of samples required to locate a hotspot, requires professional knowledge and experience, and must be supported by clear justification. The sampling points calculated are located in a plane and do not take into account vertical contamination throughout the soil profile (ie, the sampling point is the lateral location at which a soil sample is collected). Where the contamination is located in different soil strata, the number of sampling points may need to be increased to reflect the different vertical distribution of contaminants. Table B1 is not for the purpose of determining the number of samples required to characterise a site using a systematic sampling approach. Table B1 is only intended to provide guidance on the size of the hotspot a given grid size will detect.
confidence is desirable, for example, unpaved areas or garden areas where an exposure pathway is complete. Selecting an appropriate sized hotspot, and determining the number of samples required to locate a hotspot, requires professional knowledge and experience, and must be supported by clear justification. The sampling points calculated are located in a plane and do not take into account vertical contamination throughout the soil profile (ie, the sampling point is the lateral location at which a soil sample is collected). Where the contamination is located in different soil strata, the number of sampling points may need to be increased to reflect the different vertical distribution of contaminants. Table B1 is not for the purpose of determining the number of samples required to characterise a site using a systematic sampling approach. Table B1 is only intended to provide guidance on the size of the hotspot a given grid size will detect.
clmg-5-post-consultation-draft-august-2016.docx