and total phosphorous concentrations were also very high, ranking 

 at or near the top of the ranges shown for sites in the same 

 classification. Most nutrients at this site are conspicuously high 

 for settings with surface drainage and without very high salinity. 



The arsenic concentration reported for WET35 was very high, 

 exceeded only at three highly alkaline and saline sample sites. 

 The iron concentration ranked mid-range among similar sites, and 

 copper (reported at the detection limit) ranked toward the lower 

 end of the range for sites of this class. Other trace element 

 concentrations were reported below detection limits. 



Chemical history. No other quantitative chemical data from this 

 site are known. Field parameters measured in June of 1993 showed 

 higher pH (9.04; 8.3 during the DHES sampling) and considerably 

 lower specific conductance (775 microsiemens/cm; 2640 during the 

 DHES sampling.) Surface outflow and comparatively high fluid flux 

 through the basin are expected to limit the range of salinity at 

 this site. The DHES analysis, collected at the end of a dry 

 summer, may represent concentrations near the upper end of the 

 expected range for this site. 



Sediments. The wetland basin is underlain by 1 foot or more of 

 peaty organic sediments with clots of apparent authigenic sediments 

 (marl?). the selenium concentration ranked toward the upper end 

 of the range for similar sites; arsenic and boron concentrations 

 ranked toward the mid-range for sites in this classification, and 

 iron and zinc concentrations ranked at the bottom of their 

 respective ranges, with iron a significant low-end outrider among 

 intermontane valley sites. Most other trace element concentrations 

 were below detection limits. 



Arsenic and selenium concentrations exceeded the mean 

 concentrations for soils and other surficial materials of the 

 western United States by factors of 2.4 and 1.7, respectively. 

 Other trace element concentrations reported were below the regional 

 mean values for soils. 



