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' color, odor, and general recovery rate of the groundwater will be recorded These water quality <br /> ' parameters should stabilize to within 10 percent of the prior reading <br /> ' 4 3.2 Groundwater Monitoring and Sampling <br /> Groundwater samples will be collected from the newly installed well(s) once they have been <br /> developed and the water levels stabilized The depth to water and any presence of floating <br /> product will be documented prior to purging the wells using a dual-interface electronic sounding <br /> ' probe The wells will be purged of at least 3 well volumes or until the field parameters <br /> (including turbidity, temperature, pH, and conductivity) are stabilized using low flow or other <br /> Lappropriate method The field parameters will be documented on the appropriate forms as <br /> described in Section 5 3 The wells will be purged by either bailing or pumping Samples will <br /> ' be collected once the water in the well recovers to at least 80 percent of the initial level The <br /> groundwater samples will be collected and transferred to the appropriate containers and analyzed <br /> ' for the parameters identified in Table 1 <br /> ' 4.3.3 Surveying <br /> ' Upon completion of the field investigation, the monitoring well and boring locations may be <br /> surveyed by a state-licensed surveyor Both ground surface elevations and the top of the PVC <br /> ' well casing elevations will be surveyed The horizontal position of each location will be <br /> determined relative to the North American Datum 1983 and the vertical position determined <br /> ' relative to the National Geodetic Vertical Datum 1929 or 1988 The survey data will be <br /> provided in an electronic data deliverable(EDD) format as discussed in section 5 0 <br /> 4.4 Waste Containment <br /> ' Waste generated by the drilling, sampling and well development activities (drill cuttings,purge <br /> water, etc)will be temporarily stored on the property in 55-gallon drums The drums will be <br /> ' properly labeled, securely stored, and appropriately disposed <br /> Field Investigation Work Plan 9 2 September 2003 <br /> ' TREADWELL&ROLLO,INC <br />