Table 3. Number of sites, total number of samples, and number of samples with compounds above detection limit per volatile organic compound for National Pollutant Discharge Elimination System surface-water sites, South-Central Texas study area
Volatile organic compound |
Number |
Total number of samples |
Number of samples with compound above detection limit |
|
|||
1,1,1,2-Tetrachloroethane |
6 |
70 |
0 |
1,1,1-Trichloroethane |
6 |
70 |
0 |
1,1,2,2-Tetrachloroethane |
6 |
70 |
0 |
1,1,2-Trichloroethane |
6 |
70 |
0 |
1,1-Dichloroethane |
6 |
70 |
0 |
1,1-Dichloroethene |
6 |
70 |
0 |
1,1-Dichloropropene |
6 |
70 |
0 |
1,2,3-Trichlorobenzene |
6 |
70 |
0 |
1,2,3-Trichloropropane |
6 |
70 |
0 |
1,2,4-Trichlorobenzene |
6 |
106 |
0 |
1,2,4-Trimethylbenzene |
6 |
70 |
10 |
1,2-Chlorotoluene |
6 |
70 |
0 |
1,2-Dibromoethane |
6 |
70 |
0 |
1,2-Dichlorobenzene |
6 |
106 |
0 |
1,2-Dichloroethane |
6 |
70 |
0 |
1,2-Dichloropropane |
6 |
70 |
0 |
trans-1,2-Dichloroethene |
6 |
70 |
0 |
1,3,5-Trimethylbenzene |
6 |
70 |
0 |
1,3-Dichlorobenzene |
6 |
106 |
0 |
1,3-Dichloropropane |
6 |
70 |
0 |
1,4-Chlorotoluene |
6 |
70 |
0 |
1,4-Dichlorobenzene |
6 |
106 |
0 |
2,2-Dichloropropane |
6 |
70 |
0 |
2-Chloroethyl vinyl ether |
6 |
70 |
0 |
Acrolein |
6 |
70 |
0 |
Acrylonitrile |
6 |
70 |
0 |
Benzene |
6 |
70 |
2 |
Bromobenzene |
6 |
70 |
0 |
Bromochloromethane |
6 |
52 |
0 |
Bromoform |
6 |
70 |
0 |
Bromodichloromethane |
6 |
70 |
0 |
Carbon tetrachloride |
6 |
70 |
0 |
Chlorobenzene |
6 |
70 |
0 |
Chloroethane |
6 |
70 |
0 |
Chloroform |
6 |
70 |
0 |
cis-1,2-Dichloroethene |
6 |
70 |
0 |
cis-1,3-Dichloropropene |
6 |
70 |
0 |
Dibromochloromethane |
6 |
70 |
0 |
Dibromochloropropane |
6 |
70 |
0 |
Dibromomethane |
6 |
70 |
0 |
Dichlorodifluoromethane |
6 |
70 |
0 |
Trichlorotrifluoroethane |
6 |
52 |
0 |
Ethylbenzene |
6 |
70 |
2 |
Hexachlorobutadiene |
6 |
106 |
0 |
Isopropylbenzene |
6 |
70 |
0 |
Methyl bromide |
6 |
70 |
0 |
Methyl chloride |
6 |
70 |
0 |
Methylene chloride |
6 |
70 |
4 |
Methyl-tert-butyl ether |
6 |
52 |
6 |
n-Butylbenzene |
6 |
70 |
0 |
n-Propylbenzene |
6 |
70 |
0 |
Naphthalene |
6 |
106 |
6 |
p-Isopropyltoluene |
6 |
70 |
0 |
sec-Butylbenzene |
6 |
70 |
0 |
Styrene |
6 |
70 |
0 |
tert-Butylbenzene |
6 |
70 |
0 |
Tetrachloroethene |
6 |
70 |
6 |
Toluene |
6 |
70 |
16 |
trans-1,3-Dichloropropene |
6 |
70 |
0 |
Trichloroethene |
6 |
70 |
0 |
Trichlorofluoromethane |
6 |
70 |
0 |
Vinyl chloride |
6 |
70 |
0 |
Xylene |
6 |
70 |
10 |
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