Free Standards Download

BS EN 14184-2003 pdf download.Water quality Guidance standard for the surveying of aquatic macrophytes in running waters. The first approach requires relatively little time and is recommended for the routine assessment of ecological status. Only the short...

BS EN 872-2005 pdf download.Water quality Determination of suspended solids Method by filtration through glass fibre filters. 5.1 Equipment for vacuum or pressure filtration, to accommodate the selected filters (5.2). Equipment for membrane filtration can in most...

BS EN 14996-2006 pdf download.Water quality — Guidance on assuring the quality of biological and ecological assessments in the aquatic environment. 5 Design of biological and ecological studies 5.1 General aspects Biological and ecological assessments of aquatic...

BS/EN 16859-2017 pdf download.Water quality Guidance standard on monitoring freshwater pearl mussel (Margaritifera margaritifera) populations and their environment. Geographical Information Systems (GIS). Suitable quality assurance methods should be used, such as double entry of data into databases...

BS/EN 17204-2019 pdf download.Water quality - Guidance on analysis of mesozooplankton from marine and brackish waters. The following chemicals may be useful for analysis of zooplankton samples: 6.5 1-Hexadecanol (Cetyl alcohol, CH3(CH2)14CH20H) to reduce the surface tension...

BS/EN 17123-2018 pdf download.Water quality - Guidance on determining the degree of modification of the hydromorphological features of transitional and coastal waters. A standard protocol is described for assessing the extent to which the hydromorphological features of...

BS/EN 17136-2019 pdf download.Water quality - Guidance on field and laboratory procedures for quantitative analysis and identification of macroinvertebrates from inland surface waters. After decanting the remaining sand and/or gravel should be screened for rapidly sedimenting organisms...