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k4 KLEINFELDER <br /> 2 The water level probe is decontaminated in a tiisodium phosphate or non-phosphate <br /> detergent wash lollowed by a distilled water rinse, prior to use in each well <br /> 3 Water level measurements are made using a conductivity-based water-level meter <br /> Depth-to-watei is generally measured trom a surveyed mark on the north rim of the PVC <br /> well casing <br /> The water level measul ements ai c convet ted to elevations using the surveyed casing elevations <br />' B-4 2 Groundwater Sam Alin <br /> Groundwater samples aic collected ]torn the monitoring wells at the site The sampling protocol <br /> for each well is as lollows <br />' 1 Dawn-well equipment (pumps bailers, etc ) is decontaminated by steam cleaning, or by <br /> scrubbing in a trisodtEurr-phosphate of non-phosphate detergent wash followed by a <br /> distilled water rinse, piioi to use in each well Bailer cold is replaced prior to use in each <br /> Hell <br /> 2 The depth to gtoundwatei is measured using a conductivity-based water-level meter <br /> 3 The volume of watei in 17allons standing in the well is calculated by subtracting the depth <br /> to groundwater measul ement ti om the depth of the well and multiplying by the <br /> appropitatc conversion factot (0 16 fot 2-inch wells, and 0 65 foi 4-inch wells) <br /> 4 Thiee to five well volumcs of Nvater ate purged fiom each well using a submersible pump, <br /> bladdei pump, Ot Teflon bailer <br />' 5 Physical patameters (pFl elcaitcal conductivity, and temperature) are monitored for <br /> stability wlide puiging The physical parameter measurements aie recorded on purge- <br /> and-sample logs, along with the time and volume of water purged at each measurement <br /> 6 Samples ate collected with a disposable bailer or bladdei pump into appropriately <br /> piepaied bottles ptovided by the analytical laboratory <br /> 7 Samples loi metals analyst, ate usually filtered in the field at the time of collection <br /> 8 Samples aie immediately labeled and placed in an iced sample container At the end of the <br /> day, the sample, ate delivered to the analytical laboiatory under chatn-of-custody control <br /> 1 I <br /> I <br />' 20-1108-24 G01/2019R 120 Page B-6 <br /> 01999,Kltinteldtr Inc, February 5, 1999 <br /> 1 <br />