This European Standard was approved by CEN on 26 April 1999 and includes Amendment 1 approved by CEN on 23 May 2009. Supersedes EN 707:1999. The European Standard EN 707:1999+A1:2009 has the status of a Bulgarian Standard. 29 p. This standard specifies specific safety requirements and their verification for the design and construction of all semi-mounted, trailed and self-propelled slurry tankers, including their spreading or injecting devices, intended for spreading or injecting slurry which are operated by either pneumatic or mechanical power