Table T2. Average concentrations for PFT measurements of potential seawater contamination.

Table T2. Average concentrations for PFT measurements of potential seawater contamination.


Summary of PFT results (cores)		PFT (ng PFT/g sediment)
Site	Core type	Average	Standard deviation	N
1226 Deep Pacific	APC center	0.087	0.059	28
	XCB center	0.636	1.065	15
1227 Peru shelf	APC center	0.026	0.026	12
	APC outside	1.777	2.129	8
1228 Peru shelf	APC center	0.035	0.040	9
	APC outside	0.164	0.206	6
1229 Peru shelf	APC center	0.035	0.038	14
	APC outside	3.205	6.448	12
1230 Deep Pacific	APC center	0.080	0.186	15
	APC outside	0.693	0.826	14
	XCB center	0.240	0.161	4
	XCB outside	2.738	2.133	4
1231 Deep Pacific	APC center	0.022	0.015	6
	APC outside	0.077	0.070	5
	XCB center	0.029	Single sample only
	XCB outside	1.243	Single sample only
Deep Pacific sites	APC center	0.061	0.122	49
	APC outside	0.531	0.756	19
Peru shelf sites	APC center	0.032	0.034	35
	APC outside	2.064	4.593	26
Izu-Bonin Trench	APC center	0.246	0.744	12
Smith et al., 2000b	APC outside	0.966	1.551	12

Notes: N = number of samples. PFT = perfluorocarbon tracer. APC = advanced piston corer, XCB = extended core barrel. Center = center of core, outside = outer layer of sediment core adjoining core liner. 0.1 µL surface seawater contains ~50 prokaryotic cells.