1 DR. BOTHNER: Even if you are off by a factor of a hundred, you 



2 aren't going to do any harm that I can see. 



3 DR. TEAL: And we are likely to be up by a factor of at least a 



4 thousand. 



5 DR. BUTMAN: Are you sure that's right? 200 milligrams and 10'-- 



6 DR. AURAND: I will be bold here and say that perhaps we can work 



7 with John to confirm the calculation. I don't know that you want to 



8 hang your hat on this, but I think somebody from the Atlantic Region can 



9 take the assumptions and calculate it and get it in there. 



10 DR. BUTMAN: We just defined that backwards. It's 2 percent, 



11 isn't it, instead of .02 percent? 



12 DR. BOTHNER: It's 200 milligrams per kilogram; isn't that what 



13 you ended up with? 



14 DR. BUTMAN: 10' cubic centimeters. 



15 DR. TEAL: Yes, for 10* cubic centimeter. 



16 DR. BUTMAN: Right. 



17 DR. BOTHNER: 10' cubic centimeters, that's .02 milligrams per 



18 centimeter squared. 



19 DR. BUTMAN: Right. 



20 DR. BOTHNER: Let's give it a density of about--so, ppm is 



21 micrograms; that's something I didn't think of before, so that's going 



22 to be 20 micrograms per centimeter cubed and that's got a density of 1, 



23 a little bit more, of course, but that's a good ballpark, so now we are 



24 up to a 20 micrograms per gram order of magnitude increase. That 



25 compares with background values on the order of 100, 80, 60. 



26 DR. BUTMAN: It's 20 parts per million. 



27 DR. BOTHNER: It's a roughly 20 parts per million increase. Now 



28 you have to go like this, because it could be a third to a fourth of the 



29 ambient. 



30 DR. TEAL: Fine. A reasonable consideration, having done this, 



31 which we know is worse than the real situation, seems to me that the 



32 conclusion is that the metals from this source are not going to be a 



33 problem even in this canyonhead situation where we worry about 



34 concentration of the materials. 



296 



