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Title: Sampling and Analysis Plan for Environmental Control Number: Revision Date: <br /> Groundwater Monitoring PUE.EN.D.026.03 10/18/2019 Page 7 of 23 <br /> 3.1 Documentation and Records <br /> Documentation during field activities is completed through the use of field sampling forms. <br /> The intent of field documentation is to provide complete documentation of the methods of <br /> sampling and consistency between sampling events. Examples of field reporting forms that <br /> may be used to document a sampling event are included in Appendix A. <br /> 3.2 Water Level Measurements <br /> Depth to groundwater generally will be measured with an electronic water-sensing device. The <br /> measurement will be made relative to a marked measurement point at the well head(commonly <br /> the top of the PVC casing), and will be recorded to the nearest 0.01 foot. The total depth of <br /> the well will also be recorded for each well during each monitoring event. These <br /> measurements will be used to measure and record the initial static water level and wetted casing <br /> volume. Water levels may also be recorded after removal of each wetted casing volume during <br /> purging and sampling. <br /> The casing stick-up height will be measured during each monitoring event. Any change in <br /> height of the casing above ground surface or concrete pad shall be noted. If the distance <br /> changes more than 0.04 feet above a concrete pad, GCC will have the measuring point <br /> resurveyed to verify accuracy of static water elevations. <br /> 3.3 Field Water Quality Measurements <br /> Field water quality parameters (i.e., temperature, pH, and specific conductance) will be <br /> measured with a calibrated meter at each sample location(Table 1). These field measurements <br /> will be taken after each purge volume and at the time of sample collection and recorded on <br /> water quality sampling forms (Appendix A). Separate aliquots of water are used to monitor <br /> field parameters (i.e., samples for laboratory analysis will not be used or reopened for field <br /> measurements). Field meters will be calibrated at the beginning of each day in accordance <br /> with the manufacturer's specifications. Calibration information and results will be <br /> documented on the field form or a field notebook each time a field instrument is calibrated for <br /> use in the sampling activities. <br /> 3.4 Groundwater Sample Collection Procedures <br /> Groundwater sampling procedures, measurements and observations will be recorded on an <br /> appropriate field reporting form (Appendix A). The following typical sampling procedures <br /> will be followed to ensure that water quality can be reliably compared from well to well and <br /> from sampling event to sampling event and that the data are reproducible. <br /> Field water quality parameters (pH, specific conductance, and temperature) will be measured <br /> at removal of the first wetted casing volume and following removal of each subsequent wetted <br /> casing volume. If applicable or practicable, the groundwater sample will be collected <br />