HardSPEC: Surface and Ground Water Exposure Model
HardSPEC is a first-tier UK specific tool for estimating surface water and groundwater exposure resulting from herbicides applied to hard surfaces for use in assessing UK regulatory submissions for Plant Protection Products.
The model has three basic uses:
- Assessing surface water and groundwater contamination from typical professional use of herbicides on hard surfaces – uses PECsw&PECsed for urban stream, urban pond and major road stream, and PECgw from railway over groundwater. Note that this type of assessment can also encompass use on railways.
- Use by amateurs – uses PECsw & sed from Domestic stream.
- Exclusive use on railways - uses PECsw&PECsed for Railway ditch leaching and railway ditch runoff, and PECgw from railway over groundwater. Submissions for use restricted to railways have typically occurred where PECsw&PECsed from urban and rural water bodies from more general use on hard surfaces have failed the aquatic risk assessment and use may have to be limited (by the applicant) to use on railways.
The model has evolved from many years research; the following summarises the study reports which form the basis of the model and assumptions