37 Construction services, namely, building water treatment and purification facilities for the removal of trace elements, namely, chromium and other metals from aqueous solutions and media
11 Water filters; water filtering apparatus; filters for drinking water; apparatus for filtering drinking water, all of the foregoing for removal of chromium and other metals from the water and for use in municipal water purification facilities and at the point of entry for water distribution systems
42 Designing water treatment and purification facilities for the removal of trace elements, namely, chromium and other metals from aqueous solutions and media; engineering services for the construction of water treatment and purification facilities for the removal of chromium and other metals from aqueous solutions and media