Specifications include, but are not limited to: Open PO - for the cleaning of various kitchen exhaust systems located within the Division of Recreation. This project includes thoroughly cleaning the kitchen exhaust systems, filter plenums, interior of ductwork to and including the exhaust fans. Remove filters, scrape and wash plenum walls, filter frames and fire suppression equipment (not including the fusible links and trigger mechanisms). Scrape and/or brush the interior surfaces of all accessible horizontal and vertical ductwork, this should include removing existing access panels. Wash all fan blades, interior and exterior of fan housing and drip pans (hot, high pressure wash when possible) .Replace filters to original position, clearly tag and mark each kitchen exhaust system with a certificate of performance stating the date of service.