BCA 0401 - Plumbing Internship I BCA 0401 - Plumbing Internship I 30-700 con. hrs. -700 Occupational -23.3 This internship provides the plumbing apprentice the opportunity to acquire practical experience while working under the supervision of a journeyman plumber. Job skills, as defined by the work processes of the apprenticeship agreement, are taught on the job. Course Designations: (CH)