Heritage-Crystal Clean, Inc. to Hold 2022 Fourth Quarter and Year-End Conference Call

February 15, 2023

Hoffman Estates, IL., February 15, 2023 — Heritage-Crystal Clean, Inc. (Nasdaq:HCCI) plans to release its financial results for the fourth quarter of 2022 and for the full fiscal year, which ended December 31, 2022, after the market close on Wednesday, March 1, 2023.

The company will host a conference call on Thursday, March 2, 2023 at 9:30 AM Central Time, during which management will give a presentation focusing on the Company’s operations and financial results.

Interested parties can listen to the audio webcast available through our company website, https://crystal-clean.com/investor-relations/, and can participate on the call by dialing (888) 440-4149. After dialing the number, you will be required to provide the following passcode before being joined to the conference call: 8889427.

To register for the webcast of the conference call, visit https://events.q4inc.com/attendee/245611812