DPWH BLUE BOOK VOL. II (2012 ed) – STANDARD SPECIFICATIONS FOR HIGHWAYS, BRIDGES AND AIRPORTS Part A – Facilities for the Engineer Part B – Other general requirements Part C – Earthwork Item 100 – Clearing and Grubbing Item 101 – RemNOKIN of Structures and Obstructions Item 102 – Excavation Item 103 – Structure Excavation Item 104 – Embankment Item 105 – Subgrade Preparation