Table 2. Summary of Environment at Test Site I 

 (average values) 



Environmental Factors 



Surface 

 Water 



Test Site I 



Depth, ft 



— 



5,640 



Water temperature, C 



13.0 



2.45 



Dissolved oxygen content, ml/I 



6.6 



1.26 



Salinity, o/oo (ppt) 



33.6 



34.55 



pH 



7.9-8.0 



7.66 



Hydrostatic pressure, psi 



- 



2,464 



Current, knots 



- 



0.033 



Sediment 



- 



green mud containing glauconite, 

 Foramlnifera, quartz, etc. 



The results of the studies on the environment at Test Site I are reported in 

 References 1, 2, 3, and 4. These studies deal with (1) the biological activity in 

 the area including the microorganisms found in the sediment, and (2) the deep sea 

 animals found attached to rock samples collected at Test Site I. The various devices 

 and methods which were used to collect deep sea sediment samples for the study of 

 microorganisms and benthic organisms have been described in Reference 2. 



Test Materials 



For evaluating deep sea biological effects on nonmetallic specimens, two 

 bio-racks were attached to the STL). Each rack held several 3-foot-long plastic 

 rods and tubes, a plastic pipe, and a rubber vacuum hose. Numerous smaller test 

 specimens were attached to two 30x 12x l/8-inch phenolic sheets. One sheet was 

 secured to the upper section of a bio-rack, and an identical sheet was secured to 

 the bottom section. In order to expose the test materials to biodeterioration in or 

 near the mud as well as in water, the two racks were attached to the STU so that 

 the lower portions would be either exposed near or buried in the bottom sediment 

 and the upper portions would be exposed 3 to 4 feet above the mud line. The test 

 specimens assembled on the bio-racks (Figure 3) are listed in the tabulation of the 

 results, in the following section of this report. 



