Table 1. Chronology of impingement monitoring at Millstone Nuclear Power Station. 



Method of 

 Sample Estimating 



No. of 



Lengths Lengths Unit 



1) Began 5/1/72 



2) Began 3/10/77 



3) TL = Total length in inches (i) or millimeters (m) 



Cat = Total length categories of < 3", 3" to 6", > 6" (from 1/1/73-4/30/73) 



4) MP II collections began 9/75 



