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Kennedy/Jenks Consultants <br /> SOG 6: Standard Operating Guideline <br /> Measuring Groundwater Levels <br /> 6.1 Introduction <br /> This guideline describes the field procedure typically followed by Kennedy/Jenks Consultants when <br /> measuring groundwater levels. Groundwater levels in wells will be measured prior to commencing <br /> developing, purging, sampling, and pumping tests. <br /> 6.2 Equipment <br /> • Electronic water level monitoring probe or other measuring device <br /> • Decontamination supplies (e.g., buckets, Alconox, distilled water, squirt bottle) <br /> • Field notebook <br /> • Groundwater purge-and-sample form(s) if in conjunction with groundwater sampling <br /> • Keys for locks (if necessary) <br /> • Tools to open well covers (e.g., socket wrench, spanner wrench) <br /> • Disposable gloves (as a minimum), and other protective clothing (as necessary). <br /> 6.3 Typical Procedure <br /> I. If more than one well will be measured, begin depth measurement in the order in terms of <br /> lowest to highest chemical concentrations in the monitoring wells. <br /> 2. Remove well caps from all wells prior to initiation of water level measurement activities. This will <br /> allow wells to equilibrate, if necessary. <br /> 3. Measure depth-to-water using a pre-cleaned water level probe from the top of the north side of <br /> the well casing, unless otherwise instructed. <br /> 4. Repeat measurements a minimum of three times or have field partner confirm measurement. <br /> 5. Record time of day the measurement was taken using military time (e.g., 16:00). <br /> 6. Decontaminate water level and/or oil-water interface probe and line prior to reuse (refer to <br /> SOG-9, Equipment Decontamination). <br /> Monitoring Well Installation Work Plan <br /> Delicato Family Vineyards, Manteca, California SOG 6 <br /> 9tis4'W0 ✓lnWW1076569f.�cbticalo199ryfsM..stag w 018p W's 816pNawls.da Page 1 <br />