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T <br /> f <br /> , r . <br /> a� <br /> r: <br /> n <br /> MEN <br /> Uztiorr fce Company, Union Street <br /> Phrase 11 Remedial Work Plan <br /> Page 4 <br /> placed at the bottom of the boring as necessary. After the seal has been allowed <br /> to set long enough to support the weight of the Casing a three Inch (Y) diameter <br /> well casing (stainless steel or PVC) with end cap and factory perforations for <br /> placement in tate saturated zonc (laking into account seasonal variation) will he <br /> placed in the boring. '.Che screen and filter pack sizes will he as noted in the well <br /> construction drawing. The casing and end caps will be threaded or joined by <br /> stainless steel screws; no PVC cement will be used. The filter pack will extend <br /> two feet i2') above the perforated zone. A bentonite seal two to three feet (w - <br /> T) thick will be placed in the annular space above the filter pack followed by a <br /> cement grout to the surface. Seal and filter pack elevations may change based on <br /> w the underlying geology (Figure 4). <br /> 5.3 Well Development and Sampling <br /> The well will be developed until the well water appears clean of sediment and <br /> until an appropriate number of well volumes (based upon the judgement of the <br /> responsible professional) have been evacuated. The water produced during well <br /> r development will be containerized and left on site in 55-galion drums or other <br /> suitable containers for disposal as hazardous waste, if deemed necessary upon <br /> receipt of laboratory results. Disposal will be the responsibility of the client <br /> unless other arrangements have been made. <br /> All soil and ;round water samples will be properly labeled with date coilected <br /> project number, sample coordinator, and sample identification. All samples will <br /> be identified with job number-year-borehole-depth/monitoring ;veil-hour. Field <br /> records will document the above information and other significant data such as <br /> names of on-site personnel, sampling methods, date and time of sampfirg, the <br /> number of well volumes removed before sampling, preservatives added (if any) <br /> and any filtration performed on samples. <br /> The samples will be refrigerated immediately for delivery to the laboratory and <br /> will, under no circumstances, not be opened by anyone other than .laboratory <br /> personnel. Chain of Custody records will be maintained at all.timos (Figure 5). <br /> 5.4 Soil Sampling <br /> All soil sampling equipment will be thoroughly steam cleaned before and <br /> between sampling to prevent cross contamination. Relatively undisturbed soil <br /> samples will be taken at intervals of not more than five feet (5') in order to <br /> evaluate the subsurface materials; however, this sampling interval may be <br /> waived in saturated sands in which sample recovery is not possible. <br />