Table 7. Chemistry of water samples from the PCS and WSTP, surface seawater, and drilling mud filtrate at Site 994.

Core, interval (cm) 	Depth (mbsf)	Sample	pH (g/kg)	Alk (mM)	Sal (mM)	Cl  (mM)	Mg2+ (mM)	Ca2+ (mM)	SO42  (mM)	NH4+ (mM)	K+ (mM)	Sr2+ (uM)

PCS
164-994C-
36P, 0 23	300.4	IW	7.5	59.36	33.0	503	25.9	3.5	11.07	14.5	13.3	90.0
53P, 8 12	435.1	IW	7.62	91.56	34.0	507	15.9	3.3	3.65	23.4	13.6	
66P, 0 20	541.1	IW			30.0	443	14.9	3.8	4.9	20.4	11.9	100.0
66P 	541.1	Manifold				540	45.1	9.8	24.1		11.8	
70P, 0 20	569.9	IW	7.8	42.3	33.8	537	23.8	4.8	12.7	23.9	14.2	103.0

WSTP
164-994C-
25X	203.3					603	54.2	10.4	28.96	3.2	12.3	98.0
39X	318.6					594	55.1	11.2	29.11	2.1	10.7	98.0
42X	347.6					578	53.8	10.6	28.99	2.2	10.8	94.0
47X	386.1					584	55.2	10.9	29.77	4.8	10.5	89.0

Surface seawater						581	55.8	11.2	29.77	0.0	10.5	95.0

Drilling mud filtrate						551	54.9	7.8	27.8	0.0	10.1	89.0

Notes: Alk = alkalinity and Sal = salinity. PCS = pressure core sampler; IW = interstitial water (see "Explanatory Notes" chapter, this volume); and WSTP = water-sampling temperature probe. 
Depths for samples from the PCS are placed at the top of the core and not from the interval.