Lab Chemist applicants have rated the interview process at Clean Harbors with 2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 59.4% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
2 phone interviews (one with HR and one with who would be your manager) and then On-site visit if chosen to move forward and also dependent on your distance to the site.