 ELGIN, Ill.--BUSINESS WIRE--Heritage-Crystal Clean, Inc. Nasdaq:HCCI plans to release its financial results for the second quarter of 2021, which ended June 19, 2021, after the market close on Wednesday, July 28, 2021. The company will host a conference call on Thursday, July 29, 2021 at 9:30 AM Central Time, during which management will give a presentation focusing on the Companys operations and financial results. Interested parties can listen to the audio webcast available through our co 