concentrations at or near the lower end of the ranges shown for the 

 entire sample set), water column trace element concentrations were 

 below reporting limits. 



Chemical history. There is a single partial chemical analysis for 

 Mary's Frog Pond known prior to the DHES sampling. This sample, 

 collected in June of 1987, was slightly more dilute than the DHES 

 sample, and had grossly similar major-ion chemistry. Generally, 

 seasonal and interannual variation at this site is probably 

 minimal. 



Sediments. Extractable arsenic, copper, iron and zinc 

 concentrations rank low or mid-range for sample sites within this 

 classification. Mary's Frog Pond is among the handful of sampling 

 sites with reported lead concentrations; most other trace element 

 concentrations were below reporting limits. The lead concentration 

 exceeded the mean value for soils of the western U.S. by a factor 

 of 1.4. 



