| Business | Phone |
| Lafayette Engineers Inc Po Box 1051, Lafayette 94549 | (925) 376-5026 |
| Larry Walker Assoc 250 Lafayette Cir, Lafayette 94549 | (925) 962-9700 |
| Geo Trans Inc 3685 Mount Diablo Blvd # 150, Lafayette 94549 | (925) 299-9040 |
| Optimum System Solutions Inc 3727 Mt Diablo Blvd # 227, Lafayette 94549 | (925) 283-4488 |
| Process Research 930 Acalanes Rd, Lafayette 94549 | (925) 284-4575 |
| Robert C Kendall & Assoc 936 Dewing Ave # C, Lafayette 94549 | (925) 283-3232 |
| Water Resource Assoc 533 Mcbride Dr, Lafayette 94549 | (925) 283-0860 |
| William M Eames & Assoc 3623 Mt Diablo Blvd, Lafayette 94549 | (925) 283-6619 |