The final report will be sent by mail, fax or e-mail, where available. Pretreatment Pretreatment methods are reported along with each result. All necessary chemical and mechanical pretreatments of the submitted material are applied at the laboratory to isolate 14C which may best represent the time event of interest. When interpreting the results, it is important to consider the pretreatments. Some samples cannot be fully pretreated, making their 14C ages more subjective than samples which can be fully pretreated.
Some materials receive no pretreatments.
Please read the pretreatment glossary. If the Extended Counting Service is used, the 14C content is measured for a greatly extended period of time. If certain calibrations are not included with a report, the results were either too young, to old, or inappropriate for calibration.