Soil

Soil properties and Ethylene Dibromide (EDB) concentrations were measured at two locations with histories of EDB applications. The objective was to explain the presence of EDB residues in a well near one location and the lack of residues in a well near the other location. The soil profile was sampled at each location from the surface to ground water, and ground water samples were collected at the profile base. A combination of statistical analyses (stepwise linear regression and discriminant analyses) was applied to soil data to interpret differences within each location. EDB concentrations occurred at location 1 between 0 and 3.2 feet and ranged from 0.3 to 12.5 ppb, correlating with organic carbon. Location 1, composed of a silty clay with a mean soil moisture content of 23 % contained a deeper band of EDB lying between 7.7 and 9.8 feet below the soil surface. Within the band, EDB concentrations ranged from 0.2 to 0.6 ppb. The presence of this deeper band was not correlated with any measured variables, including organic carbon, and ma