Sources of PCBs in the Ramford River

Sources of PCBs in the Ramford River

TABLE 1. Concentration of PCBs in the surface sediments (0-25 cm) in mg/kg (or parts per million). Each value is an average of three analyses, see field sampling and analytical chemistry program sections for details.

Station #	1975	1980	1985	1990	1995	2000
1	0.001	0.009	0.006	0.005	0.004	0.001
2	0.007	0.008	0.002	0.003	0.008	0.004
3	0.008	0.009	0.007	0.006	0.072	0.009
4	0.112	0.0225	0.013	0.0176	0.023	0.012
5*	973	648	523	367	345	212
6*	2,020	1,863	980	789	582	537
7	145	119	124	159	188	203
8	99.0	102	105	97.7	125	121
9	73.5	78.1	81.8	90.6	92.3	107
10	75.3	81.5	96.5	83.5	86.9	85.1
11	79.9	74.2	77.6	76.9	80.3	89.9
12	63.8	68.2	60.7	78.1	80.6	83.5
13	52.8	56.1	63.4	67.1	73.2	76.4
14	50.7	53.5	55.1	60.9	77.2	81.5
15	36.9	44.5	58.9	55.6	68.7	73.4
16	28.4	36.7	45.5	48.9	58.3	65.1
17	21.4	32.7	44.8	53.7	62.3	69.9
18	6.78	7.43	10.6	15.9	17.3	19.8
19	3.86	4.57	8.06	10.3	16.7	18.2
20	2.19	2.89	3.68	7.82	9.03	13.1

* Discharge pools at the IE Plant.

TABLE 1. (cont.) Concentration of PCBs in the surface sediments (0-25 cm) in mg/kg (or parts per million). Each value is an average of three analyses, see field sampling and analytical chemistry program sections for details.

Station #	1975	1980	1985	1990	1995	2000
21	2.03	5.36	5.49	7.88	8.56	10.4
22	2.85	4.34	6.82	7.61	9.39	11.9
23	2.42	3.49	6.11	6.76	8.26	10.3
24	1.39	2.26	6.09	7.53	9.23	9.01
25	1.71	3.48	5.83	5.71	6.74	7.27
26	1.08	2.89	4.44	4.62	5.88	7.99
27	1.41	2.44	3.76	5.03	4.77	5.71
28	0.827	2.05	2.81	4.67	5.32	6.00
29	0.935	3.11	2.94	4.55	3.97	5.81
30	0.876	1.01	1.88	4.46	3.99	5.67