Evoque Maintenance for one year. This is for Full maintenance and monthly upkeep of the Major Chrome Facility Reverse Osmosis Water System per Scope of Work for the Watervliet Arsenal, Watervliet, NY.... Evoque Maintenance for one year. This is for Full maintenance and monthly upkeep of the Major Chrome Facility Reverse Osmosis Water System per Scope of Work for the Watervliet Arsenal, Watervliet, NY. Note: This is a sole source with EVOQUA WATER TECHNOLOGIES LLC, Pittsburgh, PA. All responsible offerors may submit a quote, which will be evaluated.