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HardSPEC: Surface and Ground Water Exposure Model for pesticide registration in Great Britain and Northern Ireland

When you are applying for a pesticide registration in Great Britain and Northern Ireland with a hard surface use, you need to use the model HardSPEC. HardSPEC predicts surface water, sediment and groundwater exposure from herbicide application to hard surfaces.

Background

HardSPEC estimates exposure from herbicide application to hard surfaces. It is used to calculate PECsurface water and PECsediment from professional and amateur uses and PECgroundwater from use on railways. You must provide an assessment using HardSPEC to support the use of products on hard surfaces. Hard surfaces are any man-made impermeable surface such as concrete, asphalt and railway ballast, that are not intended to bear vegetation.

Six exposure scenarios are defined in HardSPEC:

For home garden uses an assessment using only the domestic use scenario is required. For railway uses, only the railway scenarios need to be used.

The model is accessed at HardSPEC_ 1.5.2-4.3_amended

Guidance for applicants

Guidance for applicants is available:

Other resources

Updated 2021-06-14