On Wed, 5 Sep 2012, Nordlund, Dan (DSHS/RDA) wrote:

The line is drawn at 0.01 because there is a censored record where quant=0.01, 
i.e.

sb.t[which(sb.t$quant==0.01 & sb.t$ceneq1==TRUE),]
     site   sampdate        era param quant ceneq1 floor ceiling
34169 MW-5 1995-01-10 Pre-mining SbTot  0.01   TRUE     0    0.01

Dan,

  Thanks for seeing what I missed evary time I went though the data. I knew
it had to be some mis-classified observation but after three times through I
thought that I had corrected all the misfits and didn't see that one. New
eyeballs are invaluable after one's looked at data or code a long time.

Very much appreciated,

Rich

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