Table 7 continued. 



a Tests of each sample in series 1 and 2 were tested with three replicates, instead of the usual 



five replicates tested in all of the other samples. 



b Samples in series 6 were tested by Aqua Survey, Inc. 



Amphipod survival was very low in the samples from much of the lower Passaic River and through- 

 out Newark Bay (Figure 8). Samples that were toxic to amphipods were collected throughout the 

 Phase 2 study area. The six samples from the lower Hackensack River were less toxic to the amphi- 

 pods than those from the lower Passaic River. Two samples — one from central Newark Bay and one 

 from the upper Arthur Kill — caused zero percent survival. In contrast, the sediment from station 57 in 

 upper New York Harbor was not toxic in this test. Station 57 in Phase 2 and site 14 in Phase 1 were 

 located at the same coordinates and were not toxic to amphipod survival in either phase. 



Elutriate/Liquid Phase Bivalve Larvae Tests. The sediments from 109 of the 117 stations were 

 tested with the larvae of Mulinia lateralis. Insufficient material from 8 stations remained following the 

 performance of the amphipod and Microtox tests to allow performance of the bivalve embryo tests. 

 Percent survival and percent normal morphological development were measured. Percent survival and 

 percent normal development data (as decimal equivalents) for each station (n=5) were arcsin-square 

 root transformed and evaluated with one-tailed, unpaired, t-tests to determine statistically significant 

 differences from the respective controls (n=5. alpha=0.05). To determine if the mean percent survival 

 at any sites (n=3) were significantly different from mean survival in controls, the untransformed data 

 were evaluated with one-tailed t-tests (alpha=0.05). 



38 



