and zinc. Relative to hydrologically similar sites, however, none 

 of these concentrations appear extraordinary. 



Orthophosphorous and total phosphorous concentrations were near the 

 maximum for all sample sites, while both nitrate and ammonium 

 concentrations were below detection limits. Total organic carbon 

 was within the range shown by hydrologically similar sites. 



Chemical history. No water quality data predating the DHES 

 sampling are known. Observations during June, August and September 

 of showed a threefold seasonal increase in specific conductance 

 during 1994. In August of 1994, measured specific conductance 

 within the wetland varied spatially by no more than 3% 

 Schrammeck Lake has probably experienced both desiccation and 

 overflow during the recent geologic (and possibly historic) past. 

 Water quality at the high stage indicated by relict shoreline 

 features would probably be quite dilute, approaching the 

 concentration of runoff from similar geologic materials. 



Sediments. Schrammeck Lake sediments contain trace element 

 concentrations within the range shown by hydrologically similar 

 sample sites. Extractable concentrations of boron and zinc exceed 

 regional mean values for soils and other surficial materials in the 

 western U.S. 



