Water quality. Guidelines for the selection of sampling methods and devices for benthic macroinvertebrates in fresh waters Ingestion-build-279162 Specification of maintenance support services

Specification of maintenance support services requires the preparation of an agreement and management and monitoring of services during their implementation

Mobile cranes covered by EN 13000

A spherical plain bearing

BS 812-124 describes a test procedure for the determination of the frost resistance of unbound aggregate mixtures

(The inhalable fraction is sometimes called inspirable — the terms are equivalent

Water quality. Guidelines for the selection of sampling methods and devices for benthic macroinvertebrates in fresh waters Ingestion-build-279162 Specification of maintenance support services1 Scope This International Standard specifies criteria for the selection of sampling methods and devices (operation and performance characteristics) used to evaluate benthicmacroinvertebrate populations in fresh waters (rivers, canals, lakes, and reservoirs). The methods and devices considered in this International Standard are suitable for sampling all major components of the benthic assemblage. They are not suitable for sampling meiofauna.