1 The quantity of barite was in the range of 300 metric tons of 



2 barite. The study date was over the periods of '87 and '88. We just 



3 completed the last cruise a few months ago and are just now looking at 



4 the draft data from that last cruise. 



5 The study off of Texas was a combination of exploratory and 



6 development wells in a field. There were 6 developments and 4 



7 exploratories, its about 12 miles off shore, water depth was about 25 



8 meters, average well depth of all these wells was in the range of 15,000 



9 feet. 



10 The total quantity of barite is close to 17,000 metric tons of 



11 barite from the total of all these wells. The study date was in '86 and 



12 '87. If can remember all those facts and figures, I will go back to the 



13 individual studies and just try to give a brief overview of what was 



14 done in them. 



15 The first one is the Molino study in California, the exploratory. 



16 We are looking at both the temporal and spatial variability of trace 



17 metals in the sediments around the rig, and then also a very detailed 



18 study dealing with the bioavailability and potential toxicity of the 



19 various different trace metals to benthic invertebrates. 



20 I am going to try to cover a lot of data this morning and go 



21 fairly quick because I am just trying to give you an idea of the kinds 



22 information that are there, and for some of your future work some of it 



23 may be of interest to you. 



24 In California here is Santa Barbara, Point Conception, the Molino 



25 location is located right along the coast here. To give you some ideas 



26 of the barium concentration in these drilling fluids, these are 



27 different well depths, 2,300 meters, 3,500 meters and 3,800 meters. 



28 By neutron activation, the barium concentrations at the shallower 



29 depths are a little over 60,000 ppm, going up to 350,000 to 400,000 ppm 



30 range. 



31 As most of you know that have been working in the studies here on 



32 the Atlantic Coast, barium is your key tracer in the sediments with 



33 distance from the platform, and that is one of the reasons why we tend 



48 



