The Docklands Light Railway (DLR) was extended to Stratford in 1987, and to Stratford International in 2011, with services to Poplar, Canary Wharf, Lewisham, London City Airport, the Excel Centre, Beckton and Woolwich Arsenal.
There are two main categories of asbestos: amphibole asbestos and serpentine asbestos. The serpentine asbestos group contains one type of asbestos, chrysotile. The amphibole asbestos group consists of several types of asbestos: amosite, crocidolite, anthophyllite, tremolite, and actinolite.
The most dangerous type of asbestos is crocidolite. This asbestos ranges in size between 0.7 to 0.9 microns. A very rare type of asbestos is amosite, and it ranges in size from .20 to .26 microns. This is the only type of asbestos that can pass by most HEPA vacuums, unless it is industrial strength.