EHC OneWindow Board Login New EHC OneWindow Remittance System Effective January 1, 2020 EHC OneWindow Remittance System EHC Support: ehcsupport@usedoilrecycling.ca EHC OneWindow Remitter User Guide EHC OneWindow FAQs Search for a drop-off location nearest you! For large quantities, find a collector. Category: NewsFebruary 14, 2020Tags: UOMARelated articlesSpotlight on Used AntifreezeOctober 30, 2023Focus on Waste Reduction WeekOctober 20, 2023UOMAs have recovered 83.6% of used oil available for collection in CanadaJune 21, 2023