Sentence examples for uncontaminated zone from inspiring English sources

Uncontaminated groundwater with added phosphate (620 μM) was pumped into the uncontaminated zone while samples were collected 0.3 m above the injection point.

[13, 90, 91] A field experiment carried out in the uncontaminated zone showed that As III) was oxidized to As V) over short transport distances.

Groundwater to which phosphate had been added was pumped into a port in the uncontaminated zone and the port 0.3 m above it was sampled periodically (altitudes of these ports are indicated in Fig. 2).

Concentrations of As V) observed in the suboxic zone and released from the sediments in the uncontaminated zone during the tracer test were 0.03 0.08 μM, which corresponds to 0.7%-20.7%-2%e total As in the coatings.

The tracer test involved pumping 445 1 of groundwater from the uncontaminated zone with added sodium phosphate and sodium chloride (NaCl) into a single port of multilevel sampler (MLS), 23A13 (Fig. 1) at an altitude of 13.2 m.

Also consistent with this hypothesis, vertical profiles of groundwater chemistry measured prior to the tracer test showed that dissolved As V) concentrations increased along with dissolved phosphate from below detection in the uncontaminated zone to approximately 0.07 and 70 μM, respectively, in the suboxic zone.

For contamination residing in the vadose-zone, mixing a reactive agent in solid form is often difficult to manipulate and using a liquid reductant runs the risk of further spreading the contaminants to previously uncontaminated zones.

At one site in upstate New York, data have shown enrichment of PAH-degrading bacteria in subsurface contaminated zones but not in uncontaminated zones.

In contrast, we focused our analyses on discrete and uncontaminated slip zones, which should provide more-reliable estimates of temperatures attained during earthquake slip in the Emi major thrust and the Kure OST.

Considering different hydraulic conductivities in the subsurface and uncertainties associated with the rate of oxidant transport in the aquifer, the high stability of persulfate in uncontaminated aquifer zones indicates more effective transport and delivery of oxidants.

As observed elsewhere in the uncontaminated and suboxic zones, As III) concentrations were below the detection limit.