• 帯水層内のEOS®の存在をどのように測定しますか？
    There are both direct and indirect ways to measure the presence of EOS® in the aquifer.  Apparent turbidity, observed as a faint white tint in performance monitoring wells, can sometimes be used as a visual indicator of EOS® presence.  Laboratory analysis for total organic carbon (TOC) and volatile fatty acids (VFA) can also provide direct indications of the presence of substrate.  Indirectly, changes in groundwater geochemisty as a result of formation of anaerobic reducing conditions suggest that EOS® is present.
  • EOS®は重金属の固定化に使用できますか？
    Yes metals immobilization is possible. Because EOS® creates reducing conditions in the aquifer, certain redox sensitive metals (i.e. Al, Cu, Pb, Mn, and Zn) can be precipitated into non-mobile forms of various metal sulfide species. If your site doesn’t have a sufficient sulfate concentration then the addition of EAS may be required. Please contact us for more information and to discuss the details of your site.
  • EASは何の略称で何を意味しますか？
    EAS is derived from “Electron Acceptor Solution” and from “Effective Anaerobic Solution.”
  • EASは地下水面上に浮いた石油を対処できますか？
    EAS is not recommended for sites where gross, petroleum-based free product is measurable (i.e., light non-aqueous phase liquid = LNAPL).  EAS can be used at sites with residual impact (“sheen” or high dissolved concentrations) and it can be used to polish off sites where free product has been removed. Residual soil impact in the vadose zone may need to be addressed by other techniques.
  • EASには何らかの使用制限がありますか？

    • The groundwater must be deeper than 5 feet below ground surface.

    • ​The distance to residence, surface water or private well must be greater than 100 ft.

    • Distance to municipal deepwater well (100s of gpm) > 1,250 ft.

    • The plume should be stable or decreasing.