RECOVERY - XUMU031031A - Repair Parking Lot at Reentry Vehicle Fac, Bldg 8415

Modification for Differing Site conditions, Remove additional unsuitable material, Replace with Fabric and Base. This modification of contract involves the removal of 18 inches of unstable sub-grade material beneath the original proposed section by removing 1,690 cy of unsuitable material and providing a geogrid stabilization fabric at the bottom of the excavation, and import 18 inches of class 2 base or equal to satisfy the compaction of a 95 % relative density , once the 18 inches has been installed then the 6 inches of the original proposed section of base will be installed on top, to meet the durability strength of the required Traffic Index of 8. Work will include: Excavate unsuitable material; Install Geogrid Stabilization Fabric; Import Base; Process base material; Stabilize sub-grade