Exclusion(s): Establishments primarily engaged in:

*planning and designing industrial processes and systems (54133, Engineering Services); *planning and designing computer systems (54151, Computer Systems Design and Related Services); *developing and implementing public relations plans (54182, Public Relations Services); *developing and conducting marketing research or public opinion polling studies (54191, Marketing Research and Public Opinion Polling); *providing office or general administrative services on a day-to-day basis (56111, Office Administrative Services); and *providing professional and management development training (61143, Professional and Management Development Training).

Exclusion(s): Establishments primarily engaged in:

*providing environmental engineering services (54133, Engineering Services); and *environmental remediation (56291, Remediation Services).