. 4 2 ‘ 7 : TRIP REPORT CONTINUED . ~4- DRAFT two areas of tunnel water effluent were visited and proclens in connaction with the effluent were discussed. Thare are 2 areas of Successive uvertiow ponds, about 30-54 feet in diameter, 15-¢25 feet deep, in a dowi-nill orientation such that overflow as necessary is accomplished. &y the time water gets to the lower pond most of the water has evaporated. The water contains tritium and other radionuclides. A summary of the content of the ponds will be attached to Mr. Vallario's report. Suffice it to say that the problem lies in tne fact that flash floods in the area may wash some of tne containinated water toward Yucca riats. Its final place of denesiticn after such) an overflow is not known. A request for cost prediction to pipe the outflow to an area down-hill for better containment has been made. The newly constructc! Secon Area (building) was briefly visited. Some Chefigas ars being made but tie butidtiec +6 used as required (decaontaninacion for tainas uo to very haavy equipment). m The 7” cenfarence and fiei’ visit were enlightening anc very worthwhile. B. Test Readiness Briefing- 1:30-4:00 p.m.-duly 20, 1971.