MGD means million gallons per day. "mg/l" means milligrams per liter. "ug/l" means micrograms per liter. "ng/l" means nanograms per liter. "S.U." means standard pH unit. "kg/day" means kilograms per day.
MSD means the Louisville and Jefferson County Metropolitan Sewer District.
TMDL means the total maximum daily load limitation of a parameter, representing the estimated assimilative capacity for a water body before other designated uses are adversely affected. Mathematically, it is the sum of wasteload allocations for point sources, load allocations for non-point and natural background sources, and a margin of safety.
Beam axis means a line from the source through the centers of the x-ray fields.
Hammer Price means the level of bidding reached (at or above any reserve) when the auctioneer brings down the hammer;