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PClayton Group Service Page3 <br />Standard Operating Procedures <br />SOP-8 - Acquisition and Interpretation of Water-Level Data <br />' 3. Reporting - As with any field activity, all pertinent information should be annotated <br />in detail in the field logbook and photographs should be taken, if appropriate. At a <br />minimum, the following information should be reported: <br />• Monitoring well identification; <br />• Geologic sequence; <br />• Well construction details including screen and sand pack length, and subsurface <br />geologic unit (aquifer) in which the screen is situated; <br />• Depth and elevation of the top and bottom of the screen and sand pack; <br />• Location of the reference point; <br />• Distance between reference point and top of well box or ground surface; <br />• Elevation of the top of the reference point; <br />• Description of the measuring devise, and graduation; <br />• Measurement procedure; <br />• Date and time of reading; <br />• Depth to liquid level; <br />• Depth of monitoring well, if known; <br />• For determination of liquid level report: all pertinent data and computations, <br />procedure of determinations, and the stabilized liquid level. <br />All liquid level measurements should be made consistent with the accuracy desired and <br />consistent with the accuracy of the measuring devise, generally to 0.01 foot. <br />If sampling will be conducted, the water level measurements should be conducted prior to <br />any water sampling activities. <br />S:AErmr\ProfASOPs\SOP-8.doc <br />