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I <br />' GT LABORATORY <br /> ENVIR ENVIRONMENTAL O (GTEL) <br /> STANDARD OPERATING PROCEDURE <br /> I 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 area <br /> Iof bonding at the ends of the tape in order to prevent undetected tampering Each sampling far <br /> 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 the <br />' 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 is for documenting details such as <br /> a Correlation of sample numbers If samples are lit between labs <br /> P p p <br /> Ib) OC numbers when lab is logging in the samples <br /> c) Sample temperature and condition when received by lab <br /> d) Preservation notation <br />' e) pH of samples when opened for analysis (d acidified) <br /> f) Sampling observation or sampling problem <br /> Ifi The chain�f�ustody form should be included inside the shipping container. A copy should be <br /> sent to the project manager <br /> 14 GROUNDAATER <br /> �;�� TECHNOLOGY, INC <br />