Cornerstone Elementary School

The data collected at Cornerstone Elementary School are presented here. Figure 1 is a schematic of the school site that shows the rooms that were tested for indoor radon colored according to the amount of radon in the rooms. Figure 1 also show the approximate locations of the sites where field gamma-ray measurements were made. Table 1 lists the results of the field gamma-ray measurements. Samples of the top five inches of soil were collected at two of the gamma-ray sites and Table 2 lists the results of analyses of those samples. Table 3 lists the results of the indoor radon measurements.

Figure 1. Schematic of rooms at Cornerstone Elementary School showing indoor radon levels and sites at which gamma-ray measurements were made.

Table 1. Results of gamma-ray spectrometer measurements at Cornerstone Elementary School. Site locations are indicated in Figure 1 (e.g. location number 1 refers to CEP1). The column labeled "Group" identifies the group to which the measurement was assigned as a result of classification of the gamma-ray data.

Table 2. Results of laboratory measurements of soil samples. The K, eU, and eTh concentrations were determined by a laboratory gamma-ray spectrometer and the field results are presented for comparison. Radon emanation fraction was determined as discussed in the section on methodologies.

Table 3. Results of indoor radon measurements in classrooms.

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