Mountains province. The total organic carbon concentration was the 

 lowest for the glaciated plains region and among the five lowest 

 in the data set. 



Boron was the only trace element present above reporting limits in 

 the Lakeside site; it's concentration was among the lowest of the 

 Great Plains sites. 



Chemical history. The U.S. Fish and Wildlife Service has conducted 

 periodic water quality monitoring at the WET41 site since 1978. 

 Generally, these data demonstrate refuge managers' success in 

 maintaining low salinity in the Lakeside unit. The mean of over 

 150 specific conductance measurements (707 microsiemens/cm) is 

 about 30% higher than specific conductance measured at the time of 

 the DHES sampling, but only rarely has specific conductance 

 exceeded 1000 microsiemens/cm. The two anomalously high values 

 (9780 and 7500 microsiemens on May 26 and June 11, 1992) appear 

 suspect, and must represent either short-term importation of saline 

 water from Lake Bowdoin or, more probably, erroneous measurements. 

 The single anomalously low value (50 microsiemens/cm on April 17, 

 1979) is also probably an erroneous measurement. Reported pH 

 values range from 8.2 to 11.2, and dissolved oxygen ranged from 

 very high concentrations in excess of 16 mg/1 down to the 5 to 6 

 mg/1 range. No wintertime measurements are included in the USFWS 

 monitoring. 



Sediments. Arsenic, boron and zinc concentrations rank toward the 

 low end of the ranges shown for Great Plains sampling sites. The 

 iron concentration ranks mid-range among sites in this class, and 

 the copper concentration ranks toward the top of the range shown 

 by the glaciated Great Plains sites. None exceeded the mean values 

 for soils and other surficial materials of the western United 

 States . 



