I have dealt with shallow ...

I have dealt with shallow oil wells in the central USA.  Many of these wells are about 50 foot deep and produce water with about 5% oil, creosol, asphalt type petro. products.  The low salt statement is a surprise when water and oil are harvested together.  Most of the wells I have dealt with capture the oil products with a tall vertical round tube called a "shotgun" that allows the oil products to separate over time.  The water is then injected back into the wells system to help keep the oil flowing to the surface.   Picture a square with the four corners allowing the water to be injected downhole.  In the center of the square there is a fifth well that brings the water/oil mixture back to the surface.  Now expand the field with side by side squares that expands for a long producing field.

Definitions are needed for understanding:

Clean water, Low salt, low organic. and sour water.  Flair: you mean you are burning it with a flame?  Are we dealing with methane?  Dissolved methane can be a problem with potable water wells.  

An aside funny:  TheUSA  EPA book on the "Standard Methods for the Examination of Water and Wastewater"  (available from the AWWA - American Water Works Association) discussed a problem with low level of methane in drinking water when a man turned on an enclosed shower with the hot water on and stepped in with a lit cigarette in his mouth.  She shower blew up and tore down the shower walls.  (I read at least 10 years ago and I don't remember which edition of the text it was in.  I do have it on the shelf  somewhere, but we have to buy a new edition every couple of years - not cheap.

 Do you have a gas well?  With sour water, how do you define sour?  It sounds like you are bringing a water well to the surface and aerating it to remove sulfur or sulfur dioxide/

I would also recommend the book "Introduction to Oilfield Water Technology by A.G. DSTROFF, an official NACE  Publication (National Association of Corrosion Engineers:  Houston, Texas)