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' NTAL I�i� WRATORY GTEL • GT' ENVIRON? t } ETANDARD OPERATING PROCEDURE ' CONCERNING C AIN OF CUSTODY Sol:, it • ' 3. Samples must be maintained under custody until shipped or delivered to the laboratory. The laboratory will then 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 C) You locked it up after being in your possession ' d) It is in a designated secure area 2 . Cvst.ody of samples may be transferred from one person to the ' next. Each transferee and recipient must date, sign and note the time on the cbain-of-cast.ody form. ' 3 . In shipping , the container must be sealed with tape, bearing the sender 's signature across the area of bonding at the ends of the tape in order to prevent undetected tampering . Each sampling jar sbould be taped and signed as well . ' Scotch tape works well . 4 . write "sealed by" and sign in the "Remarks" box at the lie bottom of the form before sealing up the box. Place forr in a plastic bag and seal it inside the box. ' 5 . The "REMARKS" section in the upper right part of the form as 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 an (if ' acidified) . f) Sampling observation or sampling problem he 6. The Chain-of-custody form should' beshould De sent included the inside t ect shipping container. A copy manager. ' When the samples are received by the lab, the chain-cf- �• ed, and a note of the tame custody form will be dated, sign with made by a lrand receiptsewilllbe. The retainedrinatheglabors- shipping bills tory files . Gk ii �1+1t�Tf K