Gamma Emitting Isotopes – Drinking Water
Laboratory Fee Schedule
Procedure #: EZZ0142A
|Gamma in Water
|The determination of gamma emitters in drinking water samples. Cesium 134, Cesium 137, Iodine 131, Potassium, Gamma emitting isotopes with energies between 59.5 keV and 2000 keV as detected.
|Supplemental Information Required
|Performed on Specimens from (sources)
|Sample/Specimen Type for Testing
|Potable water, non-potable water
|Minimum Volume/Size Required
|Hard or soft plastic; 1 gallon + 1 liter
|Storage/Preservation Prior to Shipping
|None - Sample must be submitted to the laboratory within 5 days of collection.
|Label each bottle with a water proof marker. Pre-printing labels is acceptable. Sample identification must match submission form.
|Shipping and Specimen Handling Requirements
|Sample must be submitted to the laboratory within 5 days of collection.
|Sample must be analyzed within 180 days of sample collection. The target sample turnaround time is 120 days from date of receipt.
|Due to short half-life of I-131, this method does not meet the required detection limit of 1.0 pCi/L.
|Common Causes for Rejection
|• Insufficient quantity
• unacceptable specimen type or source
• improper shipping conditions
• expired media or collection container
• discrepancies between specimen label and submission form
• incomplete or missing submission form
|This method is conducted as follow up to samples that exceed 50 pCi/L for gross beta radioactivity. The resulting analytical results are used to calculate the beta/photon emitter MCL in mrem/yr.