Spatial Distribution of PCB Dechlorinating Bacteria and Activities in Contaminated Soil

Table 1

Analyses of the dry matter content, the total PCB concentration, the average number and percentage of chlorines less than 4 and 6, respectively, and in soil samples and commercial Aroclor mixtures [40]. ^a,b,crefer to the homolog distribution profiles, where ^ais the most typical distribution, ^bis the most dechlorinated, and ^cis the least dechlorinated among the soil analyzed soil samples. Sample Meb9 was not collected.

Location	Dry matter (mg/g)	PCB conc. (ppm)	Average no. of chlorines	≤6 chlorines (%)	≤4 chlorines (%)
Meb1	18.92	34.8	6.52	52.1	0.4
Meb2^a	17.54	264.6	6.47	53.6	0.5
Meb3	13.71	12.5	6.51	52.5	0.5
Meb4	28.25	36.6	6.54	50.7	0.4
Meb5	23.17	15.1	6.54	50.5	0.4
Meb6	26.61	3.1	6.43	54.7	1.7
Meb7	16.71	5.6	6.50	52.6	0.2
Meb8	23.71	45.3	6.54	50.5	0.5
Meb10^b	15.91	4.6	6.36	55.9	4.3
Meb11^c	26.68	2.3	6.61	45.8	1.0
Meb12	33.61	8.2	6.48	52.3	2.4
Meb13	13.55	12.1	6.47	51.8	3.2
Meb14	27.34	12.3	6.47	52.3	2.6
Meb15	29.22	35.6	6.54	47.1	2.6
Meb16	15.20	9.1	6.48	50.9	2.7
Meb17	25.10	17.6	6.52	50.9	2.0
Meb18	36.72	11.3	6.50	50.9	2.7
Meb19	20.31	20.1	6.55	48.7	1.9
Meb20	18.60	72.7	6.54	51.7	0.3
Aroclor 1016	—	—	3.04	100.0	100.0
Aroclor 1232	—	—	2.41	100.0	94.1
Aroclor 1242	—	—	3.31	100.0	92.3
Aroclor 1248	—	—	3.97	100.0	82.2
Aroclor 1254	—	—	5.15	96.0	18.9
Aroclor 1260	—	—	6.39	56.7	0.6