NOTE 1. DESCRIPTION OF BUSINESS US Ecology Holdings, Inc., the predecessor to the Company (Predecessor US Ecology), was incorporated as a Delaware corporation in March 1987 as American Ecology Corporation. On February 22, 2010, Predecessor US Ecology changed its name from American Ecology Corporation to US Ecology, Inc. On November 1, 2019, in connection with the Companys acquisition of NRC Group Holdings Corp. (NRC), a new parent entity of US Ecology completed a merger transaction with Predecessor US Ecology and became the successor to Predecessor US Ecology and changed its name to US Ecology, Inc. In connection with the closing of the NRC Merger (as defined below), Predecessor US Ecology changed its name to US Ecology Holdings, Inc. US Ecology, Inc., through its subsidiaries, is a leading North American provider of environmental services to commercial and government entities. The Company addresses the complex waste management needs of its customers, offering treatment, disposal and recycling of hazardous and radioactive waste, as well as a wide range of complementary field and industrial services. US Ecology, Inc. and its predecessors have been protecting the environment since 1952, with operations primarily in the United States, Canada, the Europe, Middle East, and Africa (EMEA) region and Mexico. Throughout these consolidated financial statements words such as we, us, our, US Ecology and the Company refer to US Ecology, Inc. and its subsidiaries. On November 1, 2019, pursuant to and subject to the conditions set forth in the Agreement and Plan of Merger (the Merger Agreement) by and among the Company, NRC, Predecessor US Ecology, Rooster Merger Sub, Inc. (NRC Merger Sub), and ECOL Merger Sub, Inc. (ECOL Merger Sub), ECOL Merger Sub merged with and into Predecessor US Ecology, with Predecessor US Ecology continuing as the surviving company and as a wholly-owned subsidiary of the Company. Substantially concurrently therewith, NRC Merger Sub merged with and into NRC, with NRC continuing as the surviving company and as a wholly-owned subsidiary of the Company. Following the completion of the mergers (collectively, the NRC Merger), the Company contributed all of the issued and outstanding equity interests of NRC to Predecessor US Ecology so that, after such contribution, NRC became a wholly-owned subsidiary of Predecessor US Ecology.  Effective as of November 1, 2019, the Company changed its name from US Ecology Parent, Inc. to US Ecology, Inc., the Companys common stock and warrants began trading on Nasdaq under the symbol ECOL and ECOLW, respectively. The Company identified itself as the successor issuer to Predecessor US Ecology pursuant to Rule 12g-3(c) under the Securities Exchange Act of 1934, as amended. Our operations are managed in two reportable segments reflecting our internal management reporting structure and nature of services offered as follows: Environmental Services This segment provides a broad range of specialty material management services including transportation, recycling, treatment and disposal of hazardous, non-hazardous, E&amp;P and radioactive waste at Company-owned landfill, wastewater, deep-well injection and other treatment facilities. Field &amp; Industrial Services This segment provides specialty field services and total waste management solutions to commercial and industrial facilities and to government entities through our 10-day transfer facilities and at customer sites, both domestic and international. Specialty field services include standby services, emergency response, industrial cleaning and maintenance, remediation, lab packs, retail services, transportation, and other services. Total waste management services include on-site management, waste characterization, transportation and disposal of non- hazardous and hazardous waste.