Clearly our ethically and morally deficient authority figures have assessed that question in the title above. Clearly they would have us believe that their lying and deception is for our own good. Perhaps the argument goes like this: People have enough stress with jobs, climate change, housing, raising children etc. Why burden them with more especially when the more is permanent groundwater destruction over which they have no control. This self-serving answer when it comes from the very people who either dumped the toxins and or were charged with protecting us from those very actions; is an attempt to justify the indefensible. If we continue to hide our serious environmental failures then we will never step up and improve our behaviour and responses to polluters and their apologists. We as citizens, if deceived by Lanxess Canada, GHD, MECP, Woolwich Township and others, can not do our civic duty and demand environmental protection as well as proper environmental remediation of either Elmira or other towns and cities.
Steam flushing has been used to remediate deep DNAPL . It can be effective although there are considerations. Firstly there is preferential removal of the more soluble components from the DNAPL long before the lower solubility, more intransigent components are stripped from the DNAPL mass. Furthermore as has previously been written here Dioxins and DDT for example can recrystallize when their solvent carrier such as chlorobenzene has been significantly reduced and or dissolved into groundwater.
Another issue is the remobilization of free phase DNAPL that can occur under steam flushing. It has been found that dependent upon location, cracks and fissures, the DNAPL pool can spread out further while under steam flushing. A third issue is the fact that the greatest removal rates occur at the start of the process but then are greatly reduced. Hence just like pump & treat remediation early success breeds complacency and overconfidence, puffery and intransigence .
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