a: 

 o 



i~ 



o 



CO 



C 



o 



O) 



•Q 



(6 



CD 



CD 



00 



■o 

 c 



-c 



o 



Q. 



•S o 



Q. CL 



<D CD 

 O 



CO 



C 



CO 



CD 



•Q 



05 



O 





TO 



C 

 <D 

 O 



Q. 



n 



^* 



(Q 



I- 







1 ■= "> 



c ™ u 













n 



CO o> CO f^ un ^ T— 



00 









■^ 



C\J IT) CM 1- -1- 



CM 







2 E o 









>, « 













2 ™ 



CO 



co '- r- CO en in CM 



CO 







0) 



lO 



CNj in in -"ir cv 



CO 







X E 









CD 















in 



CD TT o CO in o T 



CO 







CO 



CO T- TJ- 









t3^ 









I 



in 



r~- Tj- •^ o in in o 



■<r 







Q. 



'" 



T- CM 1- •■- 



■^ 



■D 













li 



« O 



CO 



CD r- o o CO in -^ 



r-- 









C^J CM CO CM '- 



>- 







« « 











c 



Q 











o 

























3 



o 





C-) 



CO •q- CO O -q- CO CO 



in 







'^SS 



r-- 



CM -"If CM CO 1- CM CO 



CO 



T! 



u 



Q. " 









O 



0) 



n 



















0) 



>. 











X- 



t- 



C 

















00 



o 1- -"I- CO ■.- in CO 



CT) 



« 







h~ 



r-~. r~. r-~. CO •^ in in 



CO 



c 





3 









to 



ID 





Z 































O 





feo 









0) 





C'l'm 



CO 



C7> in o r^ <D m CD 



CD 



m 





>.i= 



<y> 





t^ 







X Q. 









c 





O o 









0) 













o 













01 





(0 









D. 





0) 



n 



r^ O 05 CT O CO CD 



00 







o 



CJ5 



r^ CC3 CO t-- in (o CO 



t^ 







(0 













m 





















E 













CO 



■■- -"J- >- CO in o CO 



in 







a> 



CO 



T- CM ■■- CO 



^— 







^ 













H 











"D ^ 













CD g 













.E Q o 



-p g r 



£ 0) (D 



o 



r- r- CO o o ■:}■ o 







c 

 o 



CO 



1- CO -- 



CM 















I^ 



TO 











o 



Q. 











n 















CJ 



LO 



■r- in CO o -^r CO o 



(D 





o 





CD 



CD CD CO O CD r- o 



00 















0) 



2 











D 























o 



CO 











CO 



^ 













CO 



IT) 



■* o •^ o CO in CD 



CM 







3 



u> 



t-~ CO N- r~- CM in CO 



r^ 







■D 













C 













— 













o 























(I) 



Ol crt 











£ 



O C 



o 



r^ T- in o CM CM CD 



CO 





F 



O O « 



■* 



■^ -"T CO CO CM CM 



■* 





3 

 Z 



-^ ™ 







CM 





t:3 n 

 >- 













^ 





























CO CO 













en -JS (1) Oi Sf? <" 

 0) — 1 '-' ^ 5 g en 









c 



to 



CO 



(\1 









o 



r 



-^ -5: -c -c ^ £ "C3 















CO 







t31 



^- 



3 Q) >- 3 3 >- TO 









0) 



u 



o >- o O o o — 



o 







cc 



Z 



c/D (3 Z CO CO Z i5 



1- 



■ f c s 



OJ ^ ;^ — 



u i :§ I 



CO _ " J; 



(rt c {2 c 



C OJ ^ Q) , 



so " O' 



o o to ™ o • 



^ o ^ .y - : 



E 



^ x: a, . 



c: o ^ 



-Sis: 



o O S = 



S 2 >,? o 



a> 

 o 



o 



CO 



C 

 P 



S) 



>~. 

 is 



-Q 

 Co" 



■2 



"cD 



CO 



c 



CD 



o 



CO 



^ c~ 



»~ o 



3 •;: 



o 3 



CO ^ 



.sa 



O "^ 

 Q. O 



^ CD 

 CD 



O 



CD 

 CO 



C 

 55 



CD 

 -Q 

 O 



5) 

 O 



-c 

 o 



CD 



c 



CD 

 O 



i- 



a. 



I S 5 



0"°" 



1 = - 3? -= 







J. CO 





















CO 



CO 



in 1^ 



o o 



o -q- 



CM 







T— 



CM 



■■- CO 



■<a- 



'^ 



CM 







a. cj 















en 



















o 



















O 



CO 



1— 



■<r T- 



h~ r-- 



CM CM 



CM 







rj 



'- 



co in 



r}- CM 



CO CM 



CO 







h- 















0) 



















Oil 

 and 

 reas 



in 



■^ 



o o 



CO •<ir 



in o 



CD 











CM 













CD 















X 



00 



CD 



l~- o 



CO Tt 



CD O 



CO 





c 



a 



1— 





CO CM 



CM ■.- 





1— 





o 



















^ 



, T3 CO 

















CO S :2 



o 



■<3- 



r^ T- 



O CO 



■"^ O 



o 





o 



Q o o 



CO c" 







CM in 



r-. CD 





CO 





o 

















■D .. 

















n 



Sus- 

 pende 

 solids 



in 



•* 



CD O 



r^ CM 



-a- o 



■^ 







CD 



CO 



in 00 



CO CO 



CD O 



in 



C CO 



















•ta- "^^ 



CO 



r- 



•^ CO 



CO in 



in 'S- 



CD 







=! S; 



CD 



in 



■* (D 



(D ■^ 



in -^ 



in 



T3 





Z "^ 





















































0) 





X CD Q. O 

 O CD CD -^ 



CO 



■^ 



tT CD 



CO -^r 



CO •<j- 



^ 



CO 



CO 





in 



r- 



in CD 



■^ -^ 



'- M- 



in 





















to 





/', CO 















CO 





&£ 



o 



co 



1- CD 



CO CD 



■* CD 



r- 



J2 





r- 



CD 



in CD 



Irt CO 



CD 00 



CD 





















o 



0) 





































S 



c 



0) 





.J. CO 1 CO 



T3 3 CO CO 



co 



O 



a> CD 



o in 



CM CD 



CO 





s^-^g 



CD 



■^ 



CO CM 



•^ CO 



CO 00 



■* 





















(1) 





TJiJ , -5 















n 





— tn CO CO 



U) 



CD 



in O) 



CO o 



CD CM 



-S- 







O to -.r; o 

 CO g ^ a 



CO 





T— 





CM 





















■ i- I Q 



















5" j^ ^ 



in 



C\J 



CD CD 



(^ CD 



in CO 



00 







in 



CO 



in 00 



CO r-- 



in r^ 



CD 







< CJ ^ 

















c 



















O 



































CD 



c 

















_) 



o 



in 



1- o 



00 CO 



co o 



O 





f-1 



c 



CM 





'^ •"3- 



in n 



CM 



CO 





Q. 



2 

















O 

















, 

















<1> 



1^^ 



O 



o 



in CD 



CO in 



h- o 



in 





o 





CO 







CM 







-1 



C/3 " - 

















o 

































C/5 



ydro- 

 ogic 

 odifi- 

 ation 



















o 



y— 



CM CO 



CO 00 



CO CM 



in 







CM 



CM 





CvJ 1- 



CM CM 



■^ 







I - E " 















c <J c 

 o" 2 o 



in 



CM 



r- CD 



o o 



CO r^ 



CM CD 



CD 







o-s;*- 















c t 



















-S 1= 



o 



r^ 



'a- -^ 



O CO 



CO r^ 



CM 







r- 



in 



in in 



in CM 



CM CO 



CO 







D 2 

















j_ 



















a> 



A ,^ " 

















J3 



O O c 



o 



r~- 



■>- in 



O CM 



R!CD 



CO 





h 



O "D CD (0 



M- 



■<3- 



•^ CO 



CO CM 



'3- 







>, O CO 













CM 





Z 



x: - J3 











































CO 



CO 

















CO 1- 













c 

 o 



CD 



00 

 CD 



fi) 



CO 



CD -p 



3S 



o 1 



00 



5 CO 









<D 



r 



^ 



■s -C 



r: s: 



^ ^ 









cc 







CO <- 





— c 



CO 









3 



"- 



3 3 



oSS 











o 



n 



>- o 



O O 



o 









ZcoOZc/3COZi2 



1- 



■d.E 



oo =» 



£ 01 c ■ 

 c o ^ 



E 2: 



<D 



Q. 



£ 



^ 



CD 0^ 





li) 



TD 



V) 



< CO 































o ® 





<D 





m 



2 o 



Q. 



^ 





CC 



306 



