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 (PDF Version) EHC OneWindow FAQs (PDF Version) Search for a drop-off location nearest you! For large quantities, find a collector. Category: NewsFebruary 14, 2020Tags: UOMARelated articlesAttention: SARRC CollectorsJuly 29, 2022Spring 2022 National NewsletterJune 8, 20222021 Greenhouse Gas EstimatesMay 6, 2022