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r <br /> . Groundwater Sampling SOP <br /> Ramon Na :0 <br /> Date:January 01,1995 <br /> Page 1 of S <br /> BROWN & ROOT ENVIRONMENTAL <br /> CALIFORNIA <br /> STANDARD OPERATING PROCEDURE <br /> for <br /> GROUNDWATER SAMPLING <br /> OBJECTIVE : <br /> The purpose of this SOP is to provide a concise guideline for the proper collection of <br /> groundwater samples Implementation of the sampling procedures has a significant effect <br /> on the quality of the analytical data <br /> Sampling of existing monitoring wells and newly installed monitoring wells will consist of <br /> the following seven activities <br /> • Measurement of depth to water level and total depth of the well ( to calculate well <br /> volume), if the total depth is not provided, <br /> • Decontamination of sampling equipment, <br /> • Evacuation of static water(purging), <br /> • Measurement and recording of groundwater temperature, pH, and specific <br /> conductance, <br /> • Collection of the sample, <br /> I <br /> • Sample preservation and, <br /> I I <br /> • Sample handling and transportation to the laboratory <br /> I I I <br /> DECONTAMINATION : <br /> All sampling devices and monitoring equipment must be properly decontaminated prior to <br /> use Equipment decontamination must be documented in the logbook. The i <br /> decontammatlon process w1HIconsist of the following activities <br /> I <br /> I I Alconox and tap water waste, <br /> Tap water rinsie, <br /> v <br /> I , III <br /> GAGWSOP DOC <br /> I ! I II <br /> ,� t IIYI I� I I Ilk Ali�I II Ill I 'il'� I f I'I' I If II 11 ,IV I I,41 it 11 I V , lII� i�f 'I � ' II `Il� II II VI ISI , I I rl I� 'I IE II d ' �I I I li <br /> v I <br />