Samples collected obtained during the monthly periods: * -- March - April; May; June; July - September 



** - May; June; July; August - September 

 Abbreviations: AA - atomic absorption; cone - concentration; CVAF - cold vapor atomic fluorescence; diss - dissolved; GF - graphite furnace; IC - 



ion exchange chromatography; ICP - inductively coupled plasma; ISE - ion-selective electrode; MS - mass spectrography ; Org - organic; 



phos. - phosphate; tot - total; tot/rec - total recoverable 



A2-28 



