| Business | Phone |
| Gwf Power Plant Control 1600 Loveridge Rd, Pittsburg 94565 | (925) 432-0872 |
| Gwf Power Systems Co 895 E 3rd St, Pittsburg 94565 | (925) 427-1041 |
| Banister Electric Inc 690 Garcia Ave, Pittsburg 94565 | (925) 432-7357 |
| Gwf Power Systems Co 4300 Railroad Ave, Pittsburg 94565 | (925) 431-1444 |
| Gwf Power Systems Co Inc 1600 Loveridge Rd, Pittsburg 94565 | (925) 432-0799 |
| Secal Pittsburg Power Plant 690 W 10th St, Pittsburg 94565 | (925) 427-3400 |