importFrom(plyr, 
  ddply,
  llply,
  ldply,
  dlply,
  join
)

importFrom(RODBC, 
  odbcDataSources,
  odbcConnect,
  sqlQuery,
  odbcClose
)

importFrom(Hmisc, 
  wtd.mean, 
  wtd.var, 
  wtd.quantile, 
  wtd.rank, 
  wtd.table
)

importFrom(aqp, 
  "depths<-", 
  "site<-",
  diagnostic_hz,
  "diagnostic_hz<-",
  test_hz_logic
)

exportPattern("^[^\\.]")
