Table A4. Fourth TCE study--Effectiveness of wash procedure on pump
exposed to low levels of TCE.
Initial TCE concentration (mg/L) in well water
A
0.0160
B
0.0147
C
0.0162
0.0156
X
System volumes
Desorbed TCE concentration (mg/L) in DI rinse before wash treatment
of DI water
pumped
3
0.0028
3
0.0050
3
0.0038
0.0039
X
Desorbed TCE concentration (mg/L) in DI water after wash treatment
3
LD
3
LD
3
LD
LD
X
LD
=
Less than detection limit
MDL
=
0.0024 mg/L
Table A5. Fifth TCE study--Effect of EPA washing protocol on pump exposed to
high levels of TCE.
Initial TCE concentration (mg/L) in well water
A
155
B
151
C
149
152
X
System volumes
Desorbed TCE concentration (mg/L) in DI water after EPA wash procedure
of DI water
pumped
1
0.032
1
0.035
1
0.035
0.034
X
3
0.013
3
0.014
3
0.017
0.015
X
6
0.025
6
0.026
6
0.027
0.026
X
17
Previous Page
