The Scientific World Journal / 2012 / Article / Tab 2

Research Article

HCHs and DDTs in Soils around Guanting Reservoir in Beijing, China: Spatial-Temporal Variation and Countermeasures

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%