| Business | Phone |
| Infra Structure Aggregates Po Box 956, Alta Loma 91701 | (909) 941-3694 |
| Neltech Resources 6544 Sapphire St, Alta Loma 91701 | (760) 951-1107 |
| Energy Design Inc 8933 Laramie Dr, Alta Loma 91737 | (909) 941-6940 |
| Rancho Cucamonga Leadership 5684 Malachite Ave, Alta Loma 91737 | (909) 945-9656 |
| Thermastak Cal Indy 7969 Jennet St, Alta Loma 91701 | (909) 980-4431 |