Table A3. Third TCE study--Effect of detergent wash on pump exposed to high levels of TCE.
Initial TCE concentration (mg/L) in well water
A
136
B
135
C
137
136
X
Desorbed TCE concentration (mg/L) in DI rinse (3 vol.) before wash treatment
A
0.527
B
0.524
C
0.521
0.524
X
System volumes
of DI water
Desorbed TCE concentration (mg/L) after
pumped
initial wash treatment
3
0.010
3
0.011
3
0.009
0.010a*
X
6
0.010
6
0.008
6
0.011
0.010a
X
9
0.024
9
0.027
9
0.027
0.026b
X
Desorbed TCE concentration (mg/L) in DI
water following one week storage
Bladder pump alone
A
0.016
B
0.010
C
0.006
0.011
X
Bladder pump and tubing
A
0.055
B
0.052
C
0.053
0.053
X
MDL = 0.0024 mg/L
* = For each analyte, values with the same letter are not significantly different at the 95% confidence level
using Fisher's Least Significant Difference Test.
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