I have a job in a parking lot that is asvaulted . they want a another light put on that circuit. so i cut the asvault dug down about 10" ran ridged pipe and also ran it up the base of the light where i was going to get power and lb into the side of the pole light. now i though i was doing it to code 300-5 where it said if covered by 2 in concrete or equivelnt min. 6 " . but it also a section that says parkinglot min berial 24 " i am under the thought that that is unpaved ...any thought ?