"Table 6. Gas composition of PCS and WSTP samples, Hole 994C."															

Core	Depth (mbsf)	C1 (ppmv)	C2 (ppmv)	C3 (ppmv)	i-C4 (ppmv)	n-C4 (ppmv)	i-C5 (ppmv)	n-C5 (ppmv)	i-C6 (ppmv)	n-C6 (ppmv)	N2 (vol%)	O2 (vol%)	CO2 (ppmv)	Total (vol%)	C1/C2

PCS															
164-994C-															
27P (G1)	222.5	104									76	19	2090	95.2	
27P (G2)	222.5	231900	21	6	2	0.7	2.6		1.5	0.5	60	13	1780	96.4	"11,043"
27P (G3)	222.5	393800	40	11	3.5	1.4	0.4		1.2	0.4	51	9	4800	99.9	"9,845"
36P (G1)	299.4	128200	15								64	16	6480	93.5	"8,547"
36P (G2)	299.4	225000		5	1.2	0.3			0.4						
66P	540.1	228400	109	10	1						56	14	5550	93.4	"2,095"
70P	568.9	789800	474	26	2.6	2	1.9	0.7	0.3	0.2	11	2	5320	92.6	"1,666"

WSTP															
164-994C-															
"39X, coil"	318.6	950									76	19	1050	95.2	
"39X, overflow"	318.6	259200	32	1	0.5						58	18	5740	102.5	"8,100"
"39X, overflow"	318.6	187800	23	4	0.5	0.3					60	18	5530	97.3	"8,165"
"42X, coil"	347.6	5500									76	19	1170	95.7	

"Notes: PCS = pressure core sampler, and WSTP = water-sampling temperature probe. G = gas sample. Gas samples taken from the PCS are not replicates because they are sampled at different times during manifold operation (see Fig. 34). "															
"However, two replicate gas samples supposedly were taken from the overflow water of WSTP Sample 164-994C-39X. It is unclear why these samples have different absolute gas concentrations. "															
The total amount of gas likely is not 100% because concentrations of N2 and O2 are poorly calibrated. There also are significant quantities of an unidentified gas in samples.