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NORWEST <br /> COR PORAT ION <br /> arrival at the first sample location each day, the handheld water quality meters will be <br /> calibrated. All necessary equipment and supplies will be gathered and taken to the <br /> monitoring well location. The static depth to water will be measured and recorded in the <br /> field book and on the field sheets along with the well stick up. A Well Bore Volume <br /> (WBV) will be calculated for the well and multiplied by three (3) to determine the <br /> volume of water to purge prior to sample collection (ASTM, 2005). Alternatively, <br /> micropurging techniques will be used, which significantly reduce the volume of water <br /> that needs to be purged prior to sampling. Wells that produce very low volumes of water <br /> will be purged of all water and left for several hours (or overnight) to recover. Samples <br /> will be collected from the recovered water, and this may require multiple visits to the <br /> well to obtain the necessary sample volume. A submersible pump or other purging <br /> method will be used to purge the well prior to sample collection (ASTM, 2006). Field <br /> parameters will be recorded throughout the purging process with final field parameters <br /> recorded once parameters are stable and the well has been purged. Water quality samples <br /> will be collected after the field parameters are stable and the well has been purged. The <br /> sample bottle set will be labeled with the sample ID, date and time of collection, and <br /> sampler initials. The groundwater sampling analyte list is summarized in Table 2.2. All <br /> sample bottles will be filled using the flow from the submersible pump or alternative <br /> purging method. Samples will be filtered in the field or in the laboratory using a 0.45 um <br /> filter to obtain results for dissolved metals. The sample bottles will be placed in a cooler <br /> on ice and a description of the sample will be recorded in the field book and on the field <br /> sheets. The sample information will be added to the COC in preparation for sample <br /> delivery to the laboratory. The samples will be shipped or hand delivered to meet all <br /> applicable holding times to the laboratories specified in Table 2.2. <br /> 2.4.2 Groundwater Level Monitoring <br /> Water level measurements will be collected during each of the monthly visits and plotted <br /> to see changes over time. Depth to water and well stickup will be measured prior to <br /> sampling using a graduated electrical tape following procedures described in ASTM <br /> Standard D4750 (ASTM, 2001). <br /> TRANSIT MIX CONCRETE CO. <br /> SURFACE WATER AND GROUNDWATER MONITORING PLAN <br /> 2-8 <br />