- Salvage Yards, Junk Yards & Wrecker Service, Dunbar
- Sanitation Consultants, Dunbar
- Scrap & Waste Materials, Dunbar
- Secondary Schools, Dunbar
- Security Alarm Systems - Home & Business, Dunbar
- Security Control Systems & Monitoring, Dunbar - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Dunbar
- Sewer & Drain Cleaning & Repair, Dunbar - Drain Cleaner & Installation Services
- Sharpening Service, Dunbar
- Sheet Metal Contractors, Dunbar - Sheet Metal Fabrication
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- Sheet Metal Fabricators & Ductwork Contractors, Dunbar
- Shopping & Shopping Services, Dunbar
- Siding Contractors, Dunbar - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Snow Removal Services, Dunbar - Snow Plow Service
- Social Services & Welfare, Dunbar
- Specialty Stores, Dunbar
- Sporting Goods Stores, Dunbar
- Staffing & Support Services, Dunbar
- Steel Used, Dunbar
- Stone & Rock Quarry, Dunbar - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
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