U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications

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Table 5. Mean concentrations measured in bulk sediment for stations considered contaminated. Values are mean, standard deviation (sd) (µg/g dry wt.), and number of samples for all concentrations that exceeded the baseline concentration for that element. Single values are concentrations of single station overages. Total number of possible samples in Figures 3-8. Most sites sampled at three stations.

		Ag	As	Cd	Cr	Cu	Hg	Ni	Pb	Sb	Se	Sn	Zn
	Baseline Conc.	0.5	12	1.3	300	16-95*	0.7	30	27	1.4	0.4-2.5*	4.6	56-263*
St	Site
AK	Boca de Quadra
AK	Chukchi Sea
AK	Dutch Harbor
AK	Endicott Field
AK	Kamishak Bay
AK	Lutak Inlet
AK	Nakhu Bay			1.3					43 (9) 3		1.3		180
AK	Oliktok Point							45 (1) 2
AK	Port Moller												101 (11) 3
AK	Port Valdez								29
AK	Skagway								52 (13) 3				171 (58) 2
WA	Commencement								37 (7) 4
WA	Elliott Bay			1.3		105 (37) 9	0.8 (0.1) 2	37 (3) 8	67 (22) 5	2.5 (1) 2			187 (45) 9
WA	Nisqually Reach						0.9	35 (5) 8		1.6			99 (13) 9
OR	Columbia River												92 (14) 8
OR	Coos Bay					24		39 (9) 5			0.6		116
OR	Youngs Bay	0.75 (0.2) 2
CA	Bodega Bay			570 (215) 12			61 (12) 10
CA	Castro Creek					51.4 (7.6) 2		83 (7) 6	39 (19) 3	2		5 (0.4) 3	118 (23) 3
CA	Channel Islands
CA	Dana Point
CA	Estero Bay				5770			49
CA	Farallon Is.			3.3				42
CA	Humboldt Bay				597 (177) 2			60 (13) 3		1.8
		Ag	As	Cd	Cr	Cu	Hg	Ni	Pb	Sb	Se	Sn	Zn
	Baseline Conc.	0.5	12	1.3	300	16-95*	0.7	30	27	1.4	0.4-2.5*	4.6	56-263*
CA	Hunters Point	0.62 (0.17) 8	25 (20) 4		371 (40) 3			81 (30) 15	39 (11) 9			6 (0.3) 4	139
CA	Islais Creek	0.87						108 (35) 2	47 (17) 2
CA	Long Beach			1.3				39 (5) 6	101 (32) 9			5	226
CA	Mission Bay out
CA	Monterey Bay
CA	Moss Landing	1.8 (0.1) 3
CA	National City	1.9 (0.2) 4	14 (1.5) 3			114 (50) 4		36	56 (7) 4			6 (2) 3	237 (90) 5
CA	Oakland		13 (0.3) 3				1.2	104 (4) 3	44 (2) 3
CA	Oakland Est	0.55 (0.2) 3	14 (0.8) 4			129 (23) 3	1.1 (0.3) 6	125 (24) 6	99 (10) 6			11 (6) 5	310 (34) 6
CA	Oceanside
CA	Redwood City							92 (4) 6	30 (3) 6			9 (5) 3
CA	San Luis Obispo	0.6
CA	San Pablo Bay		13 (0.4) 3		597 (129) 6	51 (6) 2	2.2	79 (17) 13	33 (5) 3				115 (20) 7
CA	San Pedro Cany			1.5 (0.1) 2		40					0.8 (0.1) 2	5.2	118 (11) 3
CA	San Pedro OH	0.66 (0.17) 9		1.3		102 (32) 9		47 (12) 6	44 (10) 7		2.1	6.7	166 (40) 4
CA	E. Santa Monica								33 (2) 3
CA	W. Santa Monica	5.6 (4.1) 6		4.6 (3.6) 2		67 (34) 5			43 (20) 2		0.9	8 (4) 2	145 (50) 3
CA	Seal Beach						0.9		31 (5) 2
CA	Shelter Island					46						11 (6) 2	108
CA	N. San Diego	1.3 (0.1) 6				103 (23) 9	0.8 (0.1) 4		51 (13) 10		1.0	8 (4) 5	230 (40) 9
CA	O. San Diego
CA	S. San Diego	1.8 (0.4) 12	13 (1.2) 5	1.6		181 (46) 15	1.2 (0.4) 7		73 (32) 15			7 (3) 13	281 (72) 15
CA	Southampton		14 (1.2) 5		323 (8) 2			64 (17) 15	34 (7) 3				89 (8) 8
CA	West Harbor Is					48 (5) 2			29 (2) 3			13 (10) 2	126 (20) 5
Hanson et al. 1993 Katz and Kaplan 1981		0.14-0.2 0.4	6 - 24	0.3 - 0.4 0.4	40-140	5-26 9	0.1-0.2	11-50 15	12 - 47 10		0.4 - 0.9		40 - 175 44

* Regression used to determine baseline concentration as it varied over percent fine sediment. Hanson et al. and Katz and Kaplan published background sediment concentrations from other areas which are listed here for comparison. See text and Figure 47 for additional details. Element abbreviations in Table 3. Reference sites are in bold.