• • • • a 



• • • • • •••■■ 



• • • 



• •• • • 



• • • • 

 • • • • 



o 



in 



CO 



O 



CD 



• •• • 



o 

 Q 





lO 



in 



o 



in 



<7> 



in 

 sr 



o 



in 



CO 



o 



CO 



in 



CN 



o 



CSI 



O 



I L 



III! 



J L 



I I I L 



J L 



in 



O 

 O 

 CO 



O 

 O 



Chloride (mg/l) 



— (y> 



Figure 5 

 Chloride for 1918-1970 at Dover Groundwater Supply 



17 



