646 TRANS URANIC ELEMENTS IN THE ENVIRONMENT 



Fig. 2 Study area of Rocky Flats environs showing ponds, streams, and reservoirs. Flow 

 on Woman and Walnut Creeks is from west to east. 



plutonium contamination from past nonroutine releases. After the completion of this 

 study, pond A2 was constructed to handle excessive water runoff. This pond was not 

 investigated in this study. Pond Cj received runoff from the "pad" area located several 

 hundred yards due northeast. This area was previously contaminated by plutonium 

 from leaking 50-gal drums and was subsequently covered with an asphalt pad. The 

 southernmost pond (pond Ci) drained into Woman Creek, which flowed into Standley 

 Lake, an irrigation reservoir as well as the municipal water supply for Westminster, Colo. 

 Pond 7, located several miles northeast of the study area, was used as a control pond for 

 this study. Samples were periodically collected from pond 7 and used as background 

 correction. 



Primary plutonium waste discharged to the pond complex included laundry wastes 

 and process waste solutions generated by various phases of the plant's operation. Owing 



