Table 8. Gas composition of samples from the PCS at Site 995.														

Core	"Sample, analysis"	C1 (ppmv)	C2 (ppmv)	C3 (ppmv)	i-C4 (ppmv)	n-C4 (ppmv)	i-C5 (ppmv)	n-C5 (ppmv)	i-C6 (ppmv)	n-C6 (ppmv)	n-C7 (ppmv)	N2 (vol%)	 O2 (vol%)	CO2 (ppmv)

164-995A-														
0P*	G1-G	204												
9P	G1-N	8100	1	23	5	0.4	0.3							
18P	G1-G	719300	25	13										
18P	G1-N	652400	18	14	8.4	1	5	0.3						
27P	G1-N	19400	4	1	0.4		0.4					12.4	3	1600
27P	G2-N	837000	158	21	2.7	0.2	1.3	0.2				8.8	1.9	10700
27P	G3-N	953700	173	5	3	0.6	1.8	0.2				0.3	<0.1	10400
27P	G4-N	952500	180	5	3	0.5	2.2					0.2	<0.1	8900
27P	G5-N	914100	170	6	3.7	0.6	3.7					3.5	0.4	12300
27P	G6-N	912100	173	7	5	0.9	5.6	0.5				3	0.5	24700
36P	G1-G	26300	3	1	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
36P 	G1-N	24700		1	8.1	1.2								2200
36P	G2-N	579100	121	4	9.3	1.2						13.9	3.5	3600
36P	G3-N	970200	166	6	7	0.9	1.8	0.4				1.1	0.4	9200
36P	G4-N	966500	165	9	6.4	1.3	2.5	0.5				0.2	<0.1	14000
45P	G1-G	400			NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
45P	G1-N	400		1	0.2			0.3			1			
45P	G2-N	50900		39	434	28	0.2	0.5		0.2	173			
45P	G3-G	960200	302	11	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
45P	G3-N	907400	343	9	75	4.8	2	0.5						
48P	G1-G	34400	11		NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
48P	G1-N	40900	15	<1	24	2.4	0.2	0.3	0.1		26	6.7	1.4	635
48P	G2-G	89200	30		NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
48P	G2-N	146500	80	2	20	1.3	0.3	0.3			27	22.6	5	47600
48P	G3-G	547100	202	5	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
48P	G3-N	610100	235	5	75	4.7	1.2	0.3		0.1	18	5.3		2650
48P	G4-G	678100	267	5	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
48P	G4-N	664900	264	4			0.9	0.2				4.9	0.8	3834
52P*	G1-N	100			3.2						2	1.4	0.6	28400
52P*	G2-N	32400	14	3	717	45					94	27.1	6	20600
52P	G1-N	793200	586	6	6.5	0.8	0.4	0.2			9	0.7	0.6	5900
52P	G2-N	937200	710	6	62	0.8	3.6	0.3			11	1.4	0.5	10000
52P	G3-N	945200	777	8	33.7	2.6	1.4	0.4			11	0.6	<0.1	17100
60P	G1-G	8100	10		NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
60P	G1-N	7200	10		6.1		1	0.3			10	4.4	0.9	700
60P	G2-G	175200	60		NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
60P	G2-N	195700	99	5	12.8	1.1	0.8	0.3	0.1	0.1	3	57.8	9.5	950
70P	G1-G	700400	404	26	7.3	2.5	3	1	0.4		22	10.8	2.4	6410

164-995B-														
7P	G1-N	700		0	4.5	0.3		1				2	0.5	300
7P	G2-N	3800	4	1	16.5	0.6		0.3				25.4	6	
7P	G3-N	4700	4	1	16.5	0.7		0.5				26.1	6.1	500
7P	G4-N	804700	168	5	23.9	1.7	1.5	0.6				6.7	1.3	6000
7P	G5-N	957100	169	7	6.9	1.2	1.4	0.5				0.1	<0.1	10000
7P	G6-N	948600	176	8	13.5	1.8	2	0.9				0.2	<0.1	20000
10P	G1-N	6200		<1	36.4	1.8	0.5					11.2	2.7	300
10P	G2-N	609100	151	3	1.4	1.4	0.7	0.5				6.1	1.1	2600
10P	G3-N	924900	211	5	10.5	1.5	1.1	0.6				2	0.1	10100
10P	G4-N	938200	220	5	4.8	1.1	1.3	0.5				1	<0.1	21600
10P	G5-N	682800	178	4	4	0.9	1.1	0.4				8.1	1.7	7700

"Notes: Gas samples taken from the PCS are designated (e.g., G1) in the order in which they were collected (see Fig. 7, this chapter). Letters following the sample number refer to the shipboard analytical instrument used for gas analyses: "														
"G = GC3, and N = NGA (see ""Organic Geochemistry"" section, ""Explanatory Notes"" chapter, this volume). * = The PCS was lowered only to collect a water sample and not for coring."