In Great Britain the HSE prescribe Separation Distances for ANBI (UN3375). These distances are found in an Annex to a Guidance Document for those persons wishing to Manufacture or Store ANBI. The tables of separation for protected places on and off site are structured in such a way that any quantity exceeding 1 ton and not exceeding 10 tons attracts the same separation distances. I have a scenario where a site requires to store 10 tons of ANBI but is hampered by internal separation distances. If the scenario involved only conventional 1.1 explosives the matter would be resolved by placing 2 x 5 ton stores the requisite distance apart. The ANBI tables do not allow for this.
My question is: Can any member advise on a Technical Justification for reducing Separation Distances for ANBI or provide a documented precedent that would assist?