4230 - DECONTAMINATING & IMPREGNATING EQ
F108 - ENVIRONMENTAL SYSTEMS PROTECTION- ENVIRONMENTAL REMEDIATION
P400 - SALVAGE- DEMOLITION OF BUILDINGS
P500 - DEMOLITION OF STRUCTURES/FACILITIES
Y1QA - CONSTRUCTION OF RESTORATION OF REAL PROPERTY (PUBLIC OR PRIVATE)
Z2AA - REPAIR OR ALTERATION OF OFFICE BUILDINGS
Z2CA - REPAIR OR ALTERATION OF SCHOOLS
Z2FZ - REPAIR OR ALTERATION OF OTHER RESIDENTIAL BUILDINGS
Z2GZ - REPAIR OR ALTERATION OF OTHER WAREHOUSE BUILDINGS
Z2JZ - REPAIR OR ALTERATION OF MISCELLANEOUS BUILDINGS