Phil Richerson,

We routinely do ammonia and nitrate in surface and groundwater samples
(0.33 mg N/L to 1000 mg N/L).

You may contact me directly, or my bosses, as follows:

     Glen Martin    402-472-8210 (voice and voice mail)
     Dan Snow  402-472-7539 ( ditto )
     Roy Spalding   402-472-8214 (ditto)
     Lorraine Moon  402-472-7558 (ditto)
     FAX       402-472-9599

Glen Martin



                    Phil Richerson
                    <[log in to unmask]        To:     [log in to unmask]
                    ATE.OR.US>                    cc:
                    Sent by: Stable               Subject:     Looking for N isotope labs
                    Isotope Geochemistry
                    <[log in to unmask]
                    DU>


                    02/01/01 10:06 AM
                    Please respond to
                    Stable Isotope
                    Geochemistry






I am interested in assessing potential sources of elevated nitrate
concentrations in groundwater.  Therefore, I am looking for analytical labs
that perform nitrogen isotope analyses on water samples.  If subscribers
know of such a lab, please let me know.  I need to find out things like
cost, turn around time, etc.

Thanks,
Phil Richerson
Oregon DEQ
(541) 278-4604
(541) 278-0168 (fax)