After testing, a test sample is retained by the lab for a certain period. The following sample retention periods are implemented at OTM:
|Sample type||Size range||Retention period|
|Small samples||Smaller than 10 cm × 10 cm × 3 cm||3 years|
|Large samples||Larger than 10 cm × 10 cm × 3 cm|
Smaller than 30 cm × 30 cm × 5 cm
|Oversize samples||Larger than 30 cm × 30 cm × 5 cm||3 months|
At the end of the retention period, the sample will be disposed of by the lab. The lab may further retain some samples for internal quality control purposes.
Upon the customer’s request (indicated in the test request form or in writing), a test sample can be returned to the customer.