

o 

 o 



o 

 O 



• • •• 



• •• • 



• • • 



o 



— |t^ 



IT) 



I l_ 



I I I L 



J I L 



I I I L 



J I L 



O 



to 



in 



O 

 in 

 en 



in 



o 

 >^ 

 a> 



in 



CO 



o 

 >- 



o 



_ CO 



in 



CM 



O 



CM 



in 



O 

 O 

 CO 



O 

 O 



Chloride (mg/l) 



^ <y> 



« Figure 3 



Chloride for 1918-1970 at Colebrook Groundwater Supply 



15 



