45. 



MR. PIPER: Those that I am familiar with go back to war-time 

 operation that was not well documented. Just where it came from I 

 hesitate to say. 



QUESTION: Is there a pattern in the amount of radioactive ma- 

 terial you found in the hole? 



MR. PIPER: You mean areas of absorption. They are quite 

 unlike. I sketched a pear-shaped mass, but actually each one is 

 rather irregular. 



DR. A. B. JOSEPH: Is the sampling adequate? 



MR. PIPER: Not entirely, no. These masses aren't too large. 

 A 200-foot cylinder would probably enclose one. Near its margins 

 you get into material of so low concentration that analytical methods 

 are not sufficiently delicate to be sure of the total quantity of adsorbed 

 fission products. 



DR. R. H. WILHELM: Can one get activity by putting an ab- 

 sorber over the hole? 



MR. PIPER: An effort was made to assemble apparatus that 

 would re-enter some of the drill holes, and take samples through the 

 casings. I am not familiar with the results. 



DR. GRIGGS: I don't know if anybody mentioned it, but some- 

 body may have gotten the impression that some /waste products/ may 

 have gotten down to the ground water. How do you reconcile the fact 

 that there is no contamination beneath this pear-shaped area? 



MR. PIPER: I am not sure that any reached the ground-water 

 level immediately beneath any of the absorption zones that were drilled 

 out. I don't think we could prove so from /the existing/ sampling. 



DR. GILL.UL.Y: What happened to the stuff then? 



MR. PIPER: Some could have gone down to the water table. 

 We can't prove that it didn't. 



QUESTION: Were any samples taken below the surface of the 

 ground-water table? 



MR. PIPER: I don't recall. Can you answer, C.V. ? 



