Item 4. Controls and Procedures
ITEM 4. CONTROLS AND PROCEDURES.
Disclosure Controls and Procedures
We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e), and 15d-15(e)) as of the end of the period covered by this Form 10-Q. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this Form 10-Q.
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Changes in Internal Control Over Financial Reporting
Based on an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, there has been no change in our internal control over financial reporting during the period covered by this Form 10-Q identified in connection with that evaluation, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.
In August 2021, we acquired all of the issued and outstanding shares of ACV Enviro Corporation. As permitted by the SEC Staff interpretive guidance for newly acquired businesses, management's assessment of our internal control over financial reporting as of June 30, 2022 did not include an assessment of internal control over financial reporting as it relates to this acquisition. We will continue the process of implementing internal controls over financial reporting for this acquired business. As of June 30, 2022, this business contributed less than 2% of revenue to our unaudited consolidated financial statements for the three and six months ended June 30, 2022.
In May 2022, we acquired all of the issued and outstanding equity of US Ecology. As permitted by the SEC Staff interpretive guidance for newly acquired businesses, management's assessment of our internal control over financial reporting as of June 30, 2022 did not include an assessment of internal control over financial reporting as it relates to this acquisition. We will continue the process of implementing internal controls over financial reporting for this acquired business. As of June 30, 2022, this business contributed approximately 5% and 3% of revenue to our unaudited consolidated financial statements for the three and six months ended June 30, 2022, respectively.
In the second quarter of 2022, we implemented a new finance enterprise resource planning system, including a new general ledger accounting system. The new system was implemented after a multi-year process to design and configure our accounting and financial reporting processes within the new system. Our implementation of the new system was tested and reviewed by management. Management, together with our Chief Executive Officer and Chief Financial Officer, has determined that the changes in our internal controls over financial reporting during the three months ended June 30, 2022 have not been material.
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PART II - OTHER INFORMATION
Text extracted from the filing as submitted to EDGAR. Formatting, tables and exhibits are simplified for reading; the original document is authoritative for anything you rely on.