(ATCScript "Constants4Zinc"
  (Set PerConstituent "ZINC-POQUAL")
  (Set ImpConstituent "ZINC-SOQUAL")                               (Set PerImpConv "1.0") (Set PerImpUnits "lbs/acre") ('month is implied time step)
  (Set RchConstituent "ZINC-TROQAL")                               (Set RchConv    "1.0") (Set RchUnits         "lbs") ('month is implied time step)
  (Set PtConstituent  (Array "ZNTOTL" "DQAL2" "SQAL22" "SQAL32"))) (Set PtConv     "1.0") (Set PtUnits    "lbs/month") (Set PtScenario    "PT-OBS")
                                                                   (Set AreaUnits      "acres")
                                                                   (Set TotalUnits       "lbs")
  (Set HspfAggregation "Sum")
)