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s <br /> E ' <br /> d , <br /> --� ..GROUNDWATER TECHNOLOGY LABORATORY (GTL) <br /> STANDARD OPERATING PROCEDURE <br /> CONCERNING CHAIN OF CUSTODY <br /> LOP 11 <br /> 1. Samples must be maintained under custody until shipped or <br /> delivered to the laboratory. The laboratory will then <br /> 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 cne person to the <br /> next. Each transferee and recipient must date, sign and <br /> nate the time on the chain of custody form. <br /> 3. In. shipping, the container must be sealed with tape, bearing <br /> ire sender's signature across the area of bonding at the i <br /> ends of the tape in order to prevent undetected tampering. <br /> Each sampling jar should be taped and signed as well. <br /> Scotch tape works well. <br /> 4. Write "sQaled by" and sign in the Remarks box at the bottom <br /> of the form before sealing up the box. Place form in a <br /> plastic bag and seal inside the box. <br /> 5. The "REMARKS" section in the upper right part of the form is <br /> r for documenting details such as: <br /> �. a) correlation of sample numbers if samples are split <br /> between labs. <br /> ' b) QC numbers' when lab is logging in the samples. <br /> ;� c) sample temperature and condit:;.on when received by <br /> lab. <br /> d) Preservation notation. <br /> e) pH of samples when opened for analysis (if <br /> acidified). <br /> 6. The chain of custody force should be included inside the <br /> shipping container. A copy should be sent to the project <br /> coordinator. <br /> 7. WY:cn the .samples are received by the lab, the chain of <br /> custody form will be dated, signed, and a note of the time <br /> made by a laboratory representative. The form along with <br /> shipping bills and receipts will be retained in the labora- <br /> tory files. <br /> GROUNDWATER <br /> TECHNOLOGY,INC. <br /> CONSULTING GROUNDWATER GEOLOGISTS <br />