Table 1.

Ratios of total DDTs to the sum of its metabolites DDE and DDD and the ratio between DDE and DDD

Core	Depth (cm)	Year	DDT/(DDE+DDD)	DDE/DDD
8C	5	2002	0.29 ± 0.2	1.92 ± 1.1
	13	1995	0.06 ± 0.03	2.76 ± 0.8
	25	1984	0.04 ± 0.004	4.06 ± 0.2
	37	1974	0.14 ± 0.02	3.19 ±0.3
	49	1962	0.11 ± 0.02	3.13 ± 0.4
3C	9	1991	0.07 ± 0.03	12.8 ± 0.5
	17	1974	0.10 ± 0.1	10.8 ± 0.7
	25	1959	0.02 ± 0.001	18.4 ± 0.6
	37	1937	0.07 ± 0.1	9.46 ± 1.1
	45	1919	0.08 ± 0.1	9.40 ± 0.5