Yes, it can be treated. As to the cost per concentration, that's above my pay grade. I suggest that you ask Les B. Wells with H2S are also called "sour gas" wells. An amine unit is used to reduce CO2 and H2S to acceptable concentrations for introduction into a transmission pipeline. There may not be treating facilities available in this area of the Play. From what I have heard regarding LA., the further south the Play extends, the greater the likelihood of higher concentrations of both.
The presence of CO2 and H2S in this general area of the Play should be expected. I doubt that anyone including the E&P companies knows how the concentrations may vary from one well to the next. Section 10 is likely the same as Section 11.
Most of the wells in the southern portion of the Haynesville Shale play will have CO2 (carbon dioxide) and/or H2S (hydrogen sulfide) levels that exceed gas sales pipeline specifications. That is the reason the gathering companies have treating plants (amine facilities) integrated into their gathering systems. This is not a significant issue and just adds some incremental operating cost.