(ATCScript "Constants4NO3"
  (Set PerConstituent "NO2 NO3-POQUAL")
  (Set ImpConstituent "NO2 NO3-SOQUAL")               (Set PerImpConv "1.0") (Set PerImpUnits "lbs/acre") ('month is implied time step)
  (Set RchConstituent "NO3-OUTTOT")                   (Set RchConv    "1.0") (Set RchUnits         "lbs") ('month is implied time step)
  (Set PtConstituent  (Array "NO3L" "NUF11" "NUF13")) (Set PtConv     "1.0") (Set PtUnits    "lbs/month") (Set PtScenario    "PT-OBS")
                                                                             (Set AreaUnits      "acres")
                                                                             (Set TotalUnits       "lbs")
  (Set HspfAggregation "Sum")
)