As part of our Service Level agreement with An Garda Síochána, Forensic Science Ireland monitors the purity of the main illegal drugs in use in Ireland and provides this information to An Garda Síochána, on an intelligence basis. FSI monitors the purity of “bulk seizures” of cocaine, heroin (diamorphine) and amphetamine by analysing a sample from all seizures of these drugs in packs weighing in excess of 25 grams. FSI also monitors the purity of “street level” cocaine and heroin by analysing a representative sample of seizures of less than 25 grams.