1 to focus on it, because that is one of the only metals we really can 



2 follow to any great distance. 



3 One other thing that was done in this study that was interesting 



4 is they went to a weak leech technique with 1 normal hydrochloric to try 



5 to get some ideas as to the "bioavailable fraction" of the metals that 



6 were present in the sediments. 



7 Just for comparison you can see in the same sediment samples by 



8 weak acid leech the quantity of barium that actually comes out as 



9 compared by neutron activation, the same here, 413 versus 351. So, you 



10 can see by weak acid leech, you very quickly bump into a level where you 



11 can't get much more barium out of the sediments. 



12 A lot of the information, I'll give you the bottom line on a lot 



13 of what I'm going to cover this morning, is basically when it comes to 



14 the metals and the distribution, we are not seeing anything much 



15 different than we have seen with other studies. 



16 You see a lot of the same kind of patterns, depending on your 



17 current directions, it will determine your deposition patterns and I 



18 guess the key point on this one is that any time you are dealing with 



19 designing studies or looking for impacts, you can't just work with nice 



20 symmetric circles of concentration around a discharge point. 



21 Your currents and your net deposition patterns are going to give 



22 you patterns like this. This is the density patterns of the barium seen 



23 in the sediments from this particular well. Because of this view graph 



24 you really can't see the different concentrations here. 



25 What we ended up doing in this study is once we have done the 



25 sediment sampling to find out what the surface top 2 cm distribution was 



27 of barium, then designed a 5-station gradient crossing through these 



28 different levels of barium in the sediment in which to set up our 



29 biological stations because one of the key reasons for this study was to 



30 try to determine the bioaccumulation in the organisms and also try to 



31 determine where in the cells a lot of the metals were going. 



32 These are the five gradient stations in this study. Once they 



33 were selected by neutron activation, they were checked for barium to see 



34 the levels. You can see with distance the decreasing concentrations of 



49 



