EOS® is designed to be easily emplaced throughout the aquifer treatment zone. We have found that using chase water reduces labor costs. Increasing the dilution rate of the concentrate has the same effect as water chase. Instead of diluting the concentrate 4:1 with water and using a water chase, you could simply increase the dilution with no follow-up water chase. By using chase water, the system can be automated to deliver potable water into the subsurface. A low-pressure feed of potable water does not require onsite supervision; an injected dilute emulsion, however, should be monitored. Either method meets the design requirement.