Table 4. Detections of volatile organic compounds in samples from National Pollutant Discharge Elimination System surface-water sites, South-Central Texas study area
[In percent detections. Numbers in parentheses are number of detections per total number of samples.]
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|||||||||
Station number |
1,2,4- |
Ben- |
Ethyl- benzene |
Methy- |
Methyl- tertbutyl- ether |
Naphtha- |
Tetra- chloro- ethene |
Toulene |
Xylene |
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8177720 |
67 (8/12) |
17 (2/12) |
17 (2/12) |
0 (0/12) |
100 (6/6) |
33 (6/18) |
0 (0/12) |
50 (6/12) |
33 (4/12) |
8178420 |
17 (2/12) |
0 (0/12) |
0 (0/12) |
0 (0/12) |
0 (0/12) |
0 (0/19) |
33 (4/12) |
0 (0/12) |
0 (0/12) |
8178430 |
0 (0/10) |
0 (0/10) |
0 (0/10) |
0 (0/10) |
0 (0/10) |
0 (0/15) |
20 (2/10) |
0 (0/10) |
0 (0/10) |
8178520 |
0 (0/12) |
0 (0/12) |
0 (0/12) |
0 (0/12) |
0 (0/4) |
0 (0/18) |
0 (0/12) |
17 (2/12) |
17 (2/12) |
8178690 |
0 (0/12) |
0 (0/12) |
0 (0/12) |
17 (2/12) |
0 (0/12) |
0 (0/18) |
0 (0/12) |
50 (6/12) |
0 (0/12) |
8178820 |
0 (0/12) |
0 (0/12) |
0 (0/12) |
17 (2/12) |
0 (0/8) |
0 (0/18) |
0 (0/12) |
17 (2/12) |
33 (4/12) |
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