| Business | Phone |
| California Splicing & Testing 3725 Camino Diablo Rd, Byron 94514 | (925) 516-2382 |
| Hot Line Construction 3510 Camino Diablo Rd, Byron 94514 | (925) 634-9333 |
| Pure Electric Po Box 1510, Byron 94514 | (925) 634-6802 |
| Richardson Electric 15559 Kelso Rd, Byron 94514 | (925) 463-2261 |