| PSC | Description
|
| Z111 | Maint-rep-alt/office bldgs |
| Z112 | Maint-rep-alt/conf space & fac |
| Z119 | Maint-rep-alt/other admin bldgs |
| Z121 | Maint-rep-alt/air traffic towers |
| Z122 | Maint-rep-alt/air traffic tng fac |
| Z123 | Maint-rep-alt/radar & nav fac |
| Z124 | Maint-rep-alt/airport runways |
| Z125 | Maint-rep-alt/airport terminals |
| Z126 | Maint-rep-alt/missile systems fac |
| Z127 | Maint-rep-alt/elct & comm sys fac |
| Z129 | Maint-rep-alt/oth airfield struct |
| Z131 | Maint-rep-alt/schools |
| Z139 | Maint-rep-alt/other educational bld |
| Z141 | Maint-rep-alt/hospitals & infirmary |
| Z142 | Maint-rep-alt/labs & clinics |
| Z149 | Maint-rep-alt/other hospital bldgs |
| Z151 | Maint-rep-alt/ammunition facilities |
| Z152 | Maint-rep-alt/maint bldgs |
| Z153 | Maint-rep-alt/production bldgs |
| Z154 | Maint-rep-alt/ship const-repair fac |
| Z155 | Maint-rep-alt/tank automotive fac |
| Z159 | Maint-rep-alt/other industrial bldg |
| Z161 | Maint-rep-alt/family housing |
| Z162 | Maint-rep-alt/recreational bldgs |
| Z163 | Maint-rep-alt/troop housing |
| Z164 | Maint-rep-alt/dining facilities |
| Z165 | Maint-rep-alt/religious facilities |
| Z166 | Maint-rep-alt/penal facilities |
| Z169 | Maint-rep-alt/other residential bld |
| Z171 | Maint-rep-alt/ammo storage bldgs |
| Z172 | Maint-rep-alt/food storage bldgs |
| Z173 | Maint-rep-alt/fuel storage bldgs |
| Z174 | Maint-rep-alt/open storage fac |
| Z179 | Maint-rep-alt/other warehouse bldgs |
| Z181 | Maint-rep-alt/R&D goco facilities |
| Z182 | Maint-rep-alt/R&D gogo facilities |
| Z183 | Maint-rep-alt/R&D goco envir labs |
| Z184 | Maint-rep-alt/R&D gogo envir labs |
| Z191 | Maint-rep-alt/exhibition buildings |
| Z192 | Maint-rep-alt/test buildings |
| Z199 | Maint-rep-alt/misc bldgs |
| Z211 | Maint-rep-alt/dams |
| Z212 | Maint-rep-alt/canals |
| Z213 | Maint-rep-alt/mine fire cont |
| Z214 | Maint-rep-alt/mine subsidence cont |
| Z215 | Maint-rep-alt/surface mine reclam |
| Z216 | Maint-rep-alt/dredging |
| Z219 | Maint-rep-alt/other consv structure |
| Z221 | Maint-rep-alt/airport service roads |
| Z222 | Maint-rep-alt/hwys-roads-bridges |
| Z223 | Maint-rep-alt/tunnels-subsurf struc |
| Z224 | Maint-rep-alt/parking facilities |
| Z231 | Maint-rep-alt/epg - coal |
| Z232 | Maint-rep-alt/epg - gas |
| Z233 | Maint-rep-alt/epg - geothermal |
| Z234 | Maint-rep-alt/epg - hydro |
| Z235 | Maint-rep-alt/epg - nuclear |
| Z236 | Maint-rep-alt/epg - petroleum |
| Z237 | Maint-rep-alt/epg - solar |
| Z239 | Maint-rep-alt/epg - other |
| Z241 | Maint-rep-alt/fuel supply |
| Z242 | Maint-rep-alt/heating & cool plants |
| Z243 | Maint-rep-alt/pollution abatement |
| Z244 | Maint-rep-alt/sewage & waste |
| Z245 | Maint-rep-alt/water supply |
| Z249 | Maint-rep-alt/other utilities |
| Z291 | Maint-rep-alt/recrea non-bldg struc |
| Z292 | Maint-rep-alt/exhibit (non-bldg) |
| Z293 | Maint-rep-alt/unimproved real prop |
| Z294 | Maint-rep-alt/waste trmt-store fac |
| Z299 | Maint, rep/alter/all other |
| Z300 | Maint, rep-alt/restoration |