| Business | Phone |
| Coy Construction Co 1730 Meadow Ln, Walnut Creek 94595 | (925) 933-9390 |
| Engineered Soil Repairs 1267 Springbrook Rd, Walnut Creek 94597 | (925) 210-2150 |
| Andrew Lin Foundation 1160 Singingwood Ct, Walnut Creek 94595 | (925) 934-3693 |
| Schnabel Foundation Co 3075 Citrus Cir # 150, Walnut Creek 94598 | (925) 947-1881 |