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Groundwater Sampling SOP <br /> Revision No 0 <br /> Date January 01, 1995 <br /> Page I of 5 <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 monitonng wells and newly installed momtonng wells will consist <br /> of 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 /> I <br /> • Collection of the sample, <br /> Sample preservation and, <br /> I <br /> Sample handhiig and transportation to the laboratory <br /> 1 <br /> DECONTAMINATIiON : <br /> All sampling devices and momtonng equipment must be properly decontaminated pnor <br /> to use Equipment decontamination must be documented In the logbook The <br /> I I decontamination process will consist of the following activities , ! <br /> I f I i <br /> 1 <br /> I I <br /> I 'r I I I li L ' Ifl I I V <br /> CAGWSOPOOC I <br />