Table 2: Composition of HCH and DDT in soil samples in 2003, 2007, and 2009.

RatioYearAverageMinimumMaximumPercentage of sites with a ratio less than 1

-HCH/γ-HCH20031.350.253.358.9%
20070.420.120.7315.0%
20092.762.253.260

(DDE + DDD)/p, -DDT20032.520.2425.223.2%
20071.250.094.2241.7%
20097.070.2440.18.2%