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

Ratio Year Average Minimum Maximum Percentage of sites with a ratio less than 1 -HCH/γ-HCH 2003 1.35 0.25 3.35 8.9% 2007 0.42 0.12 0.73 15.0% 2009 2.76 2.25 3.26 0 (DDE + DDD)/p,-DDT 2003 2.52 0.24 25.2 23.2% 2007 1.25 0.09 4.22 41.7% 2009 7.07 0.24 40.1 8.2%