Table 37 continued. 



* Significantly different from controls (alpha=0.05). 



** Significantly different from controls and 80% or less of controls. 



- Not significantly different from controls. 



nd - No data. 



Significantly elevated toxicity was observed in samples from 54 stations and 16 sites in the amphipod 

 survival test; 23 stations and 6 sites in the bivalve larvae survival test; 21 stations and 6 sites in the 

 bivalve larvae development test; and 47 stations and 19 sites in the Microtox test (Table 38). Test 

 results were significantly different from controls and 80% or less of the control in samples from 42 

 stations and 10 sites in the amphipod tests; in 21 stations and 4 sites in the bivalve survival tests; in 19 

 stations and 4 sites in the bivalve development tests; and in 32 stations and 14 sites in the Microtox 

 tests. A total of 81 stations out of 1 17 (69%) and 27 sites out of 39 (69%) were indicated as signifi- 

 cantly toxic in at least one of the test end-points during Phase 1. A total of 54 stations (46%) and 19 

 sites (49%) were significantly toxic and indicated responses of 80% or less than the controls in at least 

 one of the tests. During the Phase 2 tests, amphipod survival was significantly lower than controls in 

 48 of 57 samples (84.2%). 



Table 38. Summary of the numbers of Phase 1 stations and sites indicated as significantly toxic 

 (different from controls) and numerically significant (80% controls or less) in each of four sedi- 

 ment toxicity test endpoints. 



Number of Stations Number of Sites 



Toxicity Statistically 11 Numerically Statistically 3 Numerically 



Test/Endpoint Significant Significant Significant Significant 



Ampelisca abdita 



• survival (n= 117) 54 42 16 10 



116 



