Document n9QbE3mZx2w9Vr2jDOrGn1mKm

. 1q . \S 9 0 13 P. 7 Background levels 1-5 ppt i-TEQs Forest levels . 35 ppt (% TCDD not Industrial sites 18 ppt indicated) (illegible line) Historical sludge application 200 ppt Near metal recycling plants 100-1000 ppt Lake sediment samples suggest low levels of CDDs/CDFs in the environment since 1900, with a big Increase beginning in 1950 Archived soils samples show levels of CDDs/CDFs back to at least 1877. But the levels were much lover than in today's samples. Long-range transport seems to taking place The UK has completed Its survey on a 50 km grid shoving about 5 ppt TEQs in the top 5 cm, 4. Air levels There was a consensus that a background level of 2,3,7,8-TCDD in the air Is on the order of 1-10 pg/m3. therefore, inhala tion would account for 1-10% of the total daily intake. Sweden The government has lifted its moratorium on the building of mwcs. They have established an emission target of .1 ng {TEQs?)/m3 for all new, big plants; .5 ng/m3 for small plants. They are also aggressively exporting that technology, including the US. The cdds/CDFs end up in the fly ash. United Kingdom Action level of 1 pg/kg-d. This. Is based upon reproductive toxicity Austria Nev MWCs: .1 ng TEQs/m3 Greater than 1.4 ppt TEQs In milk fat is bad The Netherlands TEFs for FCBs .should be developed in 1990s . Proposed regulations: residential soil (l'ppb); grazing areas (10 ppt); agricultural and sediment (100 ppt) The FDA Denmark Germany At the hearing it van observed that Germany accepts RsD(10-4) levels for urban air containing PAHs. It hardly makes sense, say the speaker, to target 10-6 level for CDDs/CDFs. 6