Table lb: Contamination Control Procedures: Molluscs 



ITEM 

 Sampling 



Shucking Tools 



Tissue homogenizer, mortar and 

 pestle. 



Digestion Materials: 

 tissue drying beakers 



erlenmyer flasks, watch glasses 



digestion acid 



Millipore filtering apparatus 



glass fiber filters 



PROCEDURE 



Workers wore plastic gloves, fouling organisms 

 removed from shells. 



Rinsed with 10% Baker Instra-analysed Trace 

 Metal HNO^ (HNO ) ; DDIW rinses. 



Rinsed with 10% HNO ; Q-DDIW rinses. 



Acid leaching with 10% HNO for 24 hours at 

 60°C; DDIW rinses. 



Acid leaching with cone. HNO if or 24 hours 

 at 70°C; rinsed with Q-DDIW. 

 Baker Ultrex HNO_; reagent blank analyses 

 performed. 



Acid leaching with 10% HNO for 24 hours at 

 60°C; Q-DDIW rinses. 



100 mis of 20% HNO drawn through filter fol- 

 lowed by 100 mis Q-DDIW. 



