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1 <br />' GT ENVIRONMENTAL LABORATORY (GTEL) <br /> STANDARD OPERATING PROCEDURE <br />' CONCERNING CHAIN OF CUSTODY <br /> SOP 11 <br />' 1 Samples must be maintained under custody until shipped or delivered to the laboratory The <br /> laboratory will then maintain custody A sample is under custody if <br />' a) It is in your possession <br /> b) It is in your view after being in your possession <br />' c) You locked it up after being in your possession <br /> d) It is in a designated secure area <br />' 2 Custody of samples may be transferred from one person to the next Each transferee and <br /> recipient must date, sign and note the time on the chain-of-custody form <br />' 3 In shipping, the container must be sealed with tape, bearing the sender's signature across the <br />' area of bonding at the ends of the tape in order to prevent undetected tampering Each <br /> sampling jar should be taped and signed as well Scotch tape works well <br /> 4 Write "sealed by" and sign in the "Remarks" box at the bottom of the form before sealing up <br /> the box Place form in a plastic bag and seal it inside the box <br />' 5 The "REMARKS" section in the upper right part of the form ,s for documenting details such <br /> I as <br /> a) Correlation of sample numbers if samples are split between labs <br /> b) OC numbers when lab is logging in the samples <br /> c) Sample temperature and condition when received by lab <br /> d) Preservation notation <br /> el pH of samples when opened for analysis (if acidified) <br /> f) Sampling observation or sampling problem <br /> 6 The chain-of-custody form should be included inside the shipping container A copy should <br /> Ibe sent to the project manager <br /> GROUNDWATER <br /> ,� TECHNOLOGY, INC <br />