Responses and adjustments to submissions were received by CCE up to 13 May 2005 . Following recommendations from a joint meeting of the Bureau of the Working Group on Effects and the Bureau of the EMEP Steering Body , collaboration between CCE and the EMEP Meteorological Synthesizing Centre - East ( MSC-E ) focused on establishing results of modelled depositions of cadmium , lead and mercury for 1990 and 2000 for the computation of exceedance maps .