| Business Name | Address | |
| Gleffe Electric | 1760 Howell Mountain Rd Angwin, CA 94508 |
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| Main Street Electric | 1230 Main St St Helena, CA 94574 |
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| Dooley Pump & Electric | PO Box 183 St Helena, CA 94574 |
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| Hubert Electric | PO Box 212 St Helena, CA 94574 |
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| St Helena Lighting & Design | 550 Deer Park Rd St Helena, CA 94574 |
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