Table 1:

Site numbers, distance from the start of the Chicago River at Lake Michigan (in river km), percent total organic carbon (TOC), latitude and longitude, and geometric mean concentrations of each compound or compound group (in ng/g dw). All values represent triplicate measurements; however, total PCBs concentrations are based on single measurements except for site 8 which was analyzed trice. ANOVA results are also given for each row; concentrations that share a letter are not significantly different (P < 5%).

Site # (Fig. 1)	1		2		3		4		5		6		7		8		9		10
Distance (km)	12		15		18		21		25		38		38.5		48		55		56
TOC (%)	3.58		18.68		1.75		8.27		2.95		3.86		3.10		5.25		5.33		4.11
Latitude, Longitude	41.8319, 87.7041		41.8198, 87.7425		41.8096, 87.7752		41.8016, 87.8003		41.7737, 87.8346		41.6956, 87.9501		41.6964, 87.9418		41.6545, 88.0558		41.5876, 88.0675		41.5830, 88.0687
Phen.	65,000	a	31,000	ab	4,300	cde	35,000	ab	6,800	bcd	2,200	de	1,900	de	950	e	8,300	bcd	18,000	abc
Fluoran.	96,000	a	70,000	ab	6,200	de	34,000	abcd	12,000	bcde	5,900	de	4,600	e	1,700	e	9,700	cde	47,000	abc
Pyrene	66,000	a	51,000	a	4,400	bc	27,000	ab	9,400	abc	4,900	bc	4,700	bc	1,300	c	12,000	ab	65,000	a
total PAHs	420,000	a	340,000	ab	26,000	de	170,000	abc	58,000	cde	30,000	de	22,000	de	11,000	e	68,000	bcd	270,000	abc
total PCBs	1,600		5,000		1,200		2,000		1,900		1,200		4,900		1,100		1,300		69
BDE-47	16	a	14	a	13	a	25	a	20	a	14	a	2.0	b	25	a	14	a	2.4	b
BDE-99	23	ab	21	ab	7.6	ab	18	ab	19	ab	15	ab	2.5	bc	35	a	18	ab	0.79	c
BDE-209	130	a	180	a	2.2	b	44	a	66	a	57	a	2.3	b	210	a	140	a	2.9	b
total PBDEs	190	a	240	a	30	bc	120	ab	130	ab	100	ab	8.8	c	310	a	200	a	6.4	c
HBB	0.11	a	0.13	a	0.07	a	0.18	a	0.05	a			0.07	a	0.20	a	0.08	a
EH-TBB	5.6	ab	3.9	b	2.2	bc	4.8	b	4.7	b	2.5	bc	1.3	bc	17	a	5.4	ab	0.75	c
HBCDs	3.9	ab	5.6	a	0.13	c	1.3	abc	1.3	abc	1.9	abc	0.18	bc	5.9	a	2.6	abc
BTBPE	2.2	ab	3.0	ab	0.16	e	0.50	cde	1.0	bcd	1.1	bc	0.26	de	6.3	a	2.7	ab	0.19	e
DBDPE	2.8	a	3.0	a	1.2	a			0.99	a	3.0	a	0.65	a	3.0	a	2.0	a
TCEP	41	ab	44	a	18	bcd	33	abc	16	cd	17	cd	13	d	31	abcd	33	abc
TCIPP	130	ab	140	ab	46	cd	190	a	60	cd	57	cd	25	d	82	bc	130	ab	36	d
TPHP	40	ab	63	ab	43	ab	170	a	26	ab	54	ab	18	b	22	b	22	b	18	b
TBOEP	500	cd	690	bc	510	cd	1,600	a	460	cde	440	cde	320	e	580	bc	830	b	330	de
EHDP	260	b	290	b	210	b	600	a	210	b	140	c	690	a	130	c	210	b	28	d
TEHP	190	ab	190	ab	29	d	73	c	89	c	110	bc	110	bc	250	ab	190	ab	32	d
TIPPP	84	cd	120	cd	29	e	110	cd	85	cd	74	d	270	a	140	bc	220	ab	4.7	f
TBPP	130	ab	130	ab	14	cd	57	ab	49	abc	34	bcd	9.3	d	100	ab	150	a	9.2	d
total OPEs	1,400	bcd	1,700	b	910	d	2,800	a	990	cd	990	cd	1,400	bc	1,300	bcd	1,800	b	470	e