- 25 - 



I? 



7 - 



6 - 



i 



3 - 



+ ° 



a a 



* o 



° „ + 



' + + 



D 



a + n 



a + 



= .♦ . 4 • .♦ 



i I T i 1 1 1 1 1 — i 1 1 1 1 1 1 1 r 



Jun-60 Aug-81 S«p-82 Oct-B3 Nov-84 Dac-66 Jon-87 F*b-88 Apr-89 



lima 



D c719 + e712b ♦ e726c 



+ 



DD D 



1 1 1 r 



-i 1 1 1 1 1 1 r 



Jun-60 Aug-61 Sep-82 Oct-63 Nov-64 D«c-83 Jon-87 Feb-88 Apr-89 



c728b 



Figure 11. Total Dissolved Solids in Selected Piezometers in the Tills 

 (piezometer number and symbols indicated below each graph). 



