BOD COD SST 11 8 85 33 2011 26 59 99 2013 10 5 40 52 Waste production and management Total waste production at Group sites in 2013 rose by 6% on 2012 mainly as a consequence of the production increases and changes experienced by some business segments which entailed the use of specific materials and of significant activities to remove materials as part of site maintenance and expansion and the sale of other sites.