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'EMM 01 T1,I=�IN 11 GT ENVIRONMENTAL LABORATORY (GTEL) STANDARD OPERATING PROCEDURE [ CONCERNING CHAIN OF CUSTODY SOP 11 1. Samples must be maintained under custody until shi delivered to the laboratory. The laboratory will then or maintain custody. A sample is under custody if: a) It is in your possession b) It is in your view after being in your possession d} C) You locked it up after beincl ire your possession It is in a designated secure area 2• Custody of Samples may be transferred from one person to the next. Each transferee and recipient must date, sign and nate the time on the chain of custody form. 3. In shipping, the container must be sealed with tape, be;ri.ng the sender's signature- across the area of bonding at the ends of the tape in order to prevent undetected tampering. Each sampling jar should be taped and signed as well. Scotch tape works well. 4. Write "sealed by" and sign in the Remarks box at the bottom Of the form before sealing up the box. Place form in a plastic bag and seal inside the box. 5• The "REMARiCS" section in the upper right part of the form is AMR for documenting details such as: a) correlation of sample numbers if samples are split between labs. b) QC numbers when lab is logging in the samples. C) sample temperature and condition when received by lab. d) Preservation notation. e) pH of samples when opened for analysis (if acidified). f) Sampling observation or sampling problem 6. The chain of custody form should be included inside the shipping container. A copy manager. should be sent to the project - - --- y. When the samples are received by the lab, the chain of custody form will be dated, signed, and a note of the time made by a laboratory representative. The form along with shipping hills and receipts will be. retained in thelhbora- tory files.