£ Sites in which toxicity results 



were significant in at least one test 



O Non-toxic sites 



20 



'22 



16 



14 



o 



17 



&/ 



'15 



"24 



25 



12 



23^ 



31 



o o 



32 



.28 



33 



A 



29 



30 



ft 



8 



37 



38 



O 39 



Figure 47. Sampling sites in which the mean toxicity test results were significantly 

 different from controls in at least one of the four tests or not toxic in any test 

 (average of three stations). 



119 



