HEALTH CARE SERVICES, NAMELY, OCCUPATIONAL HEALTH EXAMINATIONS FOR WORKERS, PRE-EMPLOYMENT EXAMINATIONS, HEALTH SURVEILLANCE FOR WORKERS, DRUG ABUSE TESTING, ALCOHOL TESTING, SPECIALIZED EXAMINATIONS FOR FITNESS FOR DUTY AND/OR RETURN TO WORK, HEARING TESTING, AUDIOMETRY, BACK EXAMINATIONS, MEDICAL TESTING FOR LEAD AND ASBESTOS EXPOSURE; MEDICAL SERVICES, NAMELY, MEDICAL REVIEW OFFICER SERVICES IN THE NATURE OF DRUGS-OF-ABUSE AND ALCOHOL TESTING; MEDICAL SERVICES, NAMELY, WORKERS' COMPENSATIO...