Table T8. Level of seawater contamination expected in cores based on the concentration of PFT observed in sediment, Holes 1231B and 1231D.

Table T8. Level of seawater contamination expected in cores based on the concentration of PFT observed in sediment, Holes 1231B and 1231D.


Core, section	Sample details	ng PFT/ g sediment	Potential µL seawater/ g sediment
201-1231B-
1H-2	Center	0.04	0.04
1H-2	Outside	0.05	0.05
2H-2	Center	0.01	0.01
2H-2	Outside	0.09	0.09
3H-2	Center	0.02	0.02
3H-2	Outside	0.19	0.19
6H-2	Center	BD	BD
6H-2	Outside	BD	BD
12H-2	Center (slurry)	0.03	0.03
13H-3	Center	0.03	0.03
13H-3	Outside	0.05	0.05
201-1231D-
13X-CC	Center	0.03	0.03
13X-CC	Outside	1.24	1.24

Notes: Detection limit = 0.01 µL seawater/g sediment, BD = below detection. The potential for microbial contamination is based on 5 x 10⁸ cells/L surface seawater. This may be viewed as an upper limit for microbial contamination because it requires the sediment be permeable enough to allow all of the contaminating cells to travel with the PFT.