• What changes are expected to occur in the mineralogy and chemistry of pond wasters 

 subjected to cychc evaporative salinization (drying) and dilution-dissolution (wetting) of 

 evaporites? 



• Which trace elements might co-precipitate with evaporites? Will salt deposits containing 

 toxic trace elements need to be ultimately disposed in Class I hazardous dump sites? 



• What pond design and management practices will best sustain evaporation rates and 

 precipitate salts? 



Scope of Report 



This report addresses physical and chemical characteristics and factors in evaporation 

 ponds, with emphasis on seasonal pond water chemistry, water evaporation and salt accumula- 

 tion, but does not address biological aspects. The previous interim report (Tanji and Grismer, 

 1989) contained a literature review and synthesis on these topics. 



Oancral study ATM Boundary 



Prlnd^l Slutfy Ar«a Boundary 



_ — — Subaraa Boundarlaa 

 -M^^ StraATTW and Canala 



AtBSFlELD 



Sourca: 



S«n Joaquin V»ll»y Drainage Program 



Figure 1.1 Areas of Shallow Groundwater 



page 1.16 



