Each sample arriving in the laboratory should be properly registered. A suitable sample registration form (consisting of sample identification code, description of sampling well/station with its location, name of project, date of sampling, date of sample receipt in laboratory and name of receiving person with their signature) should be used to maintain the sample record.

Check that bottles are not leaking. Store the bottles in proper conditions away from heat sources and direct sunlight. Samples should not be stored in rooms/buildings where artificial tritium compounds are, or have been, handled (contamination risk).