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CGRS, Inc. <br />Field Protocol <br />Step 1 -Measure water level. <br />Step 2 - A dedicated polyethylene bailer will be used to develop each boring. Three bore volumes will be <br />evacuated from each boring prior to sampling. <br />Step 3 -Collect water samples. Water samples will be collected using a polyethylene bailer. Afield blank <br />will be collected during the sampling program to ensure quality control. <br />Step 4 -Store samples in a cooler on ice for transport to the laboratory. Follow all documentation and <br />chain-ofcustody procedures. <br />Step 5 -Clean equipment. Water level measurement equipment will be cleaned with ethanol followed by a <br />deionized water rinse. <br />Upon completion of soil or groundwater sampling, a chain of custody log will be initiated. A copy of the <br />chain of custody will be returned to the project manager. <br />Chemical Analysis <br />All analytical parameters are described in the Laboratory Quality assurance plan presented as Appendix C. <br />Groundwater Elevation Measurements <br />The following outlines our standard groundwater quality sampling methodology. Before purging any of the <br />soil test borings or monitoring wells, water level measurements must be taken. <br />Measarinp Poirrt <br />Establish the measuring point for the well. The measuring point is marked on the north side of the top of the <br />temporary monitoring well riser. The top of the riser is normally a 2 inch casing inside a locked protective <br />casing. The riser will be PVC pipe, galvanized pipe or stainless steel pipe. The measuring point should 6e <br />described on the groundwater sample collection record. <br />Access <br />After unlocking or opening a monitoring well, the first task will be to obtain a water level measurement. <br />Water level measurements will be made ushtg an electronic +vater evel indicator. Depth to water and total <br />depth of the a-ell will be measured For calculation of purge volume. <br />