30 



25 



20 



I 



10 



Buzzards Bay Reference Station 

 Frequency Distribution 



N=24 



o ' — i — i- 



1 2 3 4 5 6 7 8 9 10 11 12 



Mean RPD Depth (cm) 



30 



25 



20 



§. 15 



10 



Buzzards Bay Disposal Site Stations 

 Frequency Distributions 



N=51 



1 2 3 4 5 6 7 8 9 10 11 12 



Mean RPD Depth (cm) 



Figure 3-13. Frequency distributions for mean apparent RPD 

 depths for on-site and off-site locations at BBDS, 

 March 1990. 



