1. Geotechnical Services Inc 10607 Aurora Ave, Urbandale, IA 50322 Coordinate: 41.64,-93.76366 Phone: (515) 270-6542
2. Thiele Geotech 10052 Justin Dr Ste F, Urbandale, IA 50322 Coordinate: 41.62072,-93.7569 Phone: (515) 986-3013