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Murray & Associates <br /> ' STANDARD OPERATING PROCEDURE <br /> CONCERNING GROUNDWATER MONITORING <br /> SOP 4 <br /> 1. Samples must be maintained under custody until shipped or delivered to a analytical <br /> ' laboratory The 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 <br /> the area of bonding at the ends of the tape in order to prevent undetected tampering. <br /> ' Each 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 <br /> up the box Place form in a plastic bag and seal inside the box <br /> S. The "REMARKS" section in the upper right part of the form is for documenting details <br /> such as <br /> a) correlation of sample numbers if samples are split between labs <br />' b) QC numbers when lab is logging in the samples <br /> C) Sample temperature and condition when received by lab <br /> d) Preservation notation <br /> C) 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 <br /> should be sent to the project manager <br /> 7 When the samples are received by the lab, the Chain of Custody form will be dated, <br /> signed, and a note of the time made by a laboratory representative The form along with <br /> shipping bills and receipts will be retained in the laboratory files <br /> 8 At the time of receipt of samples by the laboratory, the shipping container will be <br /> inspected and the sealing signature will be checked, the samples will be inspected for <br /> condition and bubbles and the temperature of a representative sample container will be <br /> measured externally by a thermocouple probe (held tightly between two samples) and <br /> recorded The laboratory QC numbers will be placed on the labels, in the accession log, <br />