quintechadmin | December 14, 2016 St. Andrews School of Math & Science . Charleston, SC (West Ashley) Elevation of Grease Trap Manhole Covers to Grade. Grease Trap Access Raise: ClearingGrease Trap Access Raise: InspectionGrease Trap Access Raise: Completed and CoveredGrease Trap Access Raise: Completed and Covered, Close-Up