. Bulletin. Natural history; Natural history. Aug. 1981 Smith & Anderson: Trace Metals 695 Fig. 2.—Soil sampling sites (X) around Kincaid Generating Station (K), the boundary between the two primary soil types, and the radial sectors (A, B, C, and D) used for statistical analysis (see Table 8). Also shown are county boundary lines and the Springfield Power Plant (S).. km across, with the power plant at the center. The sampling sites are shown in Fig. 2. Sampling was limited to two close- ly related soil types, Illiopolis (Sable) silty clay loam (north of the plant) and Virden silty cl
. Bulletin. Natural history; Natural history. Aug. 1981 Smith & Anderson: Trace Metals 695 Fig. 2.—Soil sampling sites (X) around Kincaid Generating Station (K), the boundary between the two primary soil types, and the radial sectors (A, B, C, and D) used for statistical analysis (see Table 8). Also shown are county boundary lines and the Springfield Power Plant (S).. km across, with the power plant at the center. The sampling sites are shown in Fig. 2. Sampling was limited to two close- ly related soil types, Illiopolis (Sable) silty clay loam (north of the plant) and Virden silty clay loam (south of the plant). Samples were taken from the upper 2 cm of soil in agricultural fields that had not been disturbed for several months. Sub- samples were scraped from three separate level areas at each site and pooled to make a single sample. The sampling sites were at least 50 m (usually 100 m) from secondary roads and at least 200 m from highways and railroad tracks. The samples were air dried, placed in plastic bottles, and rolled for 2 hours to homogenize the soil before an aliquot was removed for analysis. Lake Sediment Sediment S2uiiples were taken from Lake Sangchris with an Ekman dredge and a Phleger corer. In the mercury study the Ekman dredge was used at six regular lake stations (the slag pond was excluded) on a quarterly basis. Subsequent yearly samples were taken for continued monitoring of the sediment's mercury concentration. The Phleger corer, equip- ped with S4 kg of weights and a 61-cm collecting tube, was used to take three core samples at each station, penetrating in each case into the original bottom material. One such series was taken dur- ing the first year of the project, and a sec- ond series in the third year. Each core was held intact within a plastic sleeve in- serted into the collecting tube prior to taking the sample. The cores were frozen for storage and to facilitate sectioning. Later, the plastic sleeve was warmed under running wat
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