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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT <br />WATER QUALITY CONTROL DIVISION <br />WATER QUALITY PROTECTION SECTION <br />GROUND-WATER PERMIT GUIDANCE <br />SUGGESTED MONITORING WELL SAMPLING PROTOCOL <br />B. GROUPTD-WATER SAMPLE C,OLLECTIOH <br />6- FIELD SAMPLE COLLECTION AND TESTING <br />dewatering of certain beds and may cause a change in temperature. Pumping time <br />insufficient to allow equilibration of water temperature in the casing and pump <br />column will also cause drifr of the temperature. Samples should be collected as close <br />to the wellhead as possible. If a container is used to hold the sample, the first sample <br />should sit in the container for one to two minutes in order to allow container to <br />- - - eejui7itira€e:-Thesairip{e ism tfiiovinuat afterrtheatre ro nvo miriutes and a second- <br />sample is to be collected into the container and the temperature should be recorded <br />immeaiately. <br />03i99mj1 <br />9 <br />