- Safe, Lock & Key Repair Services, Copperopolis - Safes & Vaults Opening & Repair
- Safety & Security Systems & Consultants, Copperopolis
- Satellite TV Service, Copperopolis
- Secondary Schools, Copperopolis
- Security Brokers & Dealers, Copperopolis
- Septic Tank Installation & Repair, Copperopolis - Septic Systems
- Septic Tank Pumping & Cleaning, Copperopolis - Septic Systems
- Septic Tanks & Septic Systems Contractors, Copperopolis - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Septic Tanks & Systems Inspection, Copperopolis
- Service Establishment Supplies & Equipment, Copperopolis
- Sewer & Drain Cleaning & Repair, Copperopolis - Drain Cleaner & Installation Services
- Shopping & Shopping Services, Copperopolis
- Signs, Copperopolis
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- Snack Foods, Copperopolis
- Social Services & Welfare, Copperopolis
- Social Workers & Services, Copperopolis
- Societies & Foundation Associations, Copperopolis
- Solar Products & Services, Copperopolis
- Specialty Animal Services, Copperopolis
- Specialty Stores, Copperopolis
- Sports & Recreational Services, Copperopolis
- Sprinkler Alarm Systems, Copperopolis - Fire Sprinkler Systems
- Staffing & Support Services, Copperopolis
- Steel & Metal Goods, Copperopolis - Steel Distributors
- Storage & Closet Equipment Supplies & Materials, Copperopolis
- Stoves & Furnace Equipment, Copperopolis - Fittings & Repair Parts
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