The data collected at Miraleste Intermediate 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 Miraleste Intermediate School showing indoor radon levels and sites at which gamma-ray measurements were made.
Table 1. Results of gamma-ray spectrometer measurements at Miraleste Intermediate School. Site locations are indicated in Figure 1 (e.g. location number 1 refers to MIP1). The column labeled "Group" identifies the group to which the measurement was assigned as a result of classification of the gamma-ray data.
|
Location |
K |
eU |
eTh |
Group |
Latitude |
Longitude |
|
|
(%) |
(ppm) |
(ppm) |
|
(degrees) |
(degrees) |
|
MIP1 |
0.5 |
1.6 |
1.0 |
1 |
33.7529 |
-118.3284 |
|
MIP2 |
0.8 |
2.2 |
2.4 |
1 |
33.7537 |
-118.3289 |
|
MIP3 |
0.6 |
1.5 |
1.3 |
1 |
33.7529 |
-118.3288 |
|
MIP4 |
1.3 |
3.6 |
4.3 |
3 |
33.7543 |
-118.3293 |
|
MIP5 |
0.6 |
1.8 |
1.6 |
1 |
33.7536 |
-118.3276 |
|
MIP6 |
1.6 |
2.9 |
4.3 |
3 |
33.7542 |
-118.3296 |
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.
|
Location |
Laboratory |
Field Spectrometer |
Radon |
Latitude |
Longitude | ||||
|
|
K |
eU |
eTh |
K |
eU |
eTh |
Eman. |
(degrees) |
(degrees) |
|
|
(%) |
(ppm) |
(ppm) |
(%) |
(ppm) |
(ppm) |
|
|
|
|
MIP1 |
0.5 |
2.8 |
2.0 |
0.5 |
1.6 |
1.0 |
0.17 |
33.7529 |
-118.3284 |
|
MIP6 |
1.0 |
3.4 |
3.7 |
1.6 |
2.9 |
4.3 |
0.15 |
33.7542 |
-118.3296 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Bulk Density (g/cc) |
Water Content |
Porosity |
|
|
| |||
|
MIP1 |
1.00 |
14.2% |
0.62 |
|
|
| |||
|
MIP6 |
1.14 |
14.7% |
0.57 |
|
|
| |||
Table 3. Results of indoor radon measurements in classrooms.
|
Room |
Radon |
Start |
Stop |
||
|
Number |
(pCi/L) |
Date |
Time |
Date |
Time |
|
Band |
2.5 |
15-Feb-03 |
11:50 |
17-Feb-03 |
11:35 |
|
Blank |
0.2 |
15-Feb-03 |
15:25 |
17-Feb-03 |
15:25 |
|
Drama |
2.9 |
15-Feb-03 |
11:51 |
17-Feb-03 |
11:36 |
|
103 |
1.2 |
15-Feb-03 |
12:29 |
17-Feb-03 |
12:04 |
|
104 |
1.1 |
15-Feb-03 |
12:30 |
17-Feb-03 |
12:06 |
|
105 |
0.5 |
15-Feb-03 |
12:31 |
17-Feb-03 |
12:07 |
|
409 |
1.0 |
15-Feb-03 |
11:56 |
17-Feb-03 |
11:39 |
|
411 |
0.8 |
15-Feb-03 |
11:57 |
17-Feb-03 |
11:41 |
|
413 |
0.5 |
15-Feb-03 |
12:00 |
17-Feb-03 |
11:43 |
|
414 |
0.5 |
15-Feb-03 |
12:04 |
17-Feb-03 |
11:44 |
|
415 |
0.5 |
15-Feb-03 |
12:09 |
17-Feb-03 |
11:46 |
|
416 |
0.5 |
15-Feb-03 |
12:10 |
17-Feb-03 |
11:47 |
|
506 |
0.8 |
15-Feb-03 |
12:15 |
17-Feb-03 |
11:53 |
|
506 |
0.8 |
15-Feb-03 |
12:16 |
17-Feb-03 |
11:53 |
|
508 |
0.2 |
15-Feb-03 |
12:14 |
17-Feb-03 |
11:51 |
|
509 |
0.2 |
15-Feb-03 |
12:13 |
17-Feb-03 |
11:49 |
|
612 |
0.9 |
15-Feb-03 |
12:21 |
17-Feb-03 |
11:57 |
|
613 |
0.8 |
15-Feb-03 |
12:22 |
17-Feb-03 |
11:58 |
|
614 |
0.7 |
15-Feb-03 |
12:24 |
17-Feb-03 |
12:00 |
|
615 |
0.3 |
15-Feb-03 |
12:26 |
17-Feb-03 |
12:01 |
|
TAB |
1.6 |
15-Feb-03 |
11:47 |
17-Feb-03 |
11:33 |
|
TAB |
1.6 |
15-Feb-03 |
11:48 |
17-Feb-03 |
11:33 |
|
Test Center |
0.3 |
15-Feb-03 |
12:19 |
17-Feb-03 |
11:55 |
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