NOTE 1 HACCP assessment identifies relevant hazards and establishes critical control points (CCP) and critical limits (CL) for ensuring that any risks associated with material use are controlled within acceptable limits. HACCP therefore sets a precautionary barrier to gully and road sweepings being ‘blended’ to dilute pollutants by ensuring the contamination levels in the end material from the PAS being below the relevant standards for the critical pollutants in their own right.

NOTE 2 The soil and soil amendments are intended principally, but not exclusively, for use as soils in providing physical support, drainage and nutrients to trees and shrubs in challenging built-up environments, where requirements for growth can be very demanding. The use of such soils in, for instance, the support of street trees, would help meet street tree planting programmes and reduce the demand for virgin materials.