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Site Characterization Work Plan <br /> ABF Freight System,Inc <br /> Manteca,California Page 8 <br /> • 5.6 Monitoring Well Development and Sampling <br /> After well installation is complete, CAL INC will develop and sample each well The wells will <br /> be developed by using a combination of bailing and pumping with a centrifugal pump After well <br /> development is complete, the wells will be sampled using a disposable polyethylene bailer The <br /> water samples will be analyzed for TPH-D, BTEX, and Oxygenates <br /> 5.7 Water Level Measurements and Well Sampling <br /> Water level measurements will be collected from each well prior to well development and <br /> sampling In addition, at least one round of water levels will be collected All water level <br /> measurements will be collected using an electronic water level sounding device <br /> The top of casing of each well will be surveyed relative to a temporary benchmark, or a <br /> permanent USGS benchmark, if readily available The top of casing elevations will be used in <br /> conjunction with water Ievel measurement data for developing groundwater elevation contour <br /> maps At a minimum, two groundwater elevation contour maps will be developed <br /> 5.8 Grouting and Waste Materials <br /> All morutonng wells installed during the proposed investigation will be sealed according to <br /> • PHS/EHD requirements All soil generated during the drilling, decontamination water, and <br /> groundwater generated during the monitoring well development and sampling w>ilI be stored in <br /> 55 gallon drums and disposed of in accordance with al regulatory guidelines <br /> 5.9 Report Preparation <br /> Upon completion of the field investigation, CAL INC will prepare a Site Assessment report <br /> outlining the findings of the investigation described above The report will be consistent with <br /> PHS/EHD guidelines and include a description of the field activities, figures showing sampling <br /> locations, soil boring logs, a summary of the analytical data, water level data, and groundwater <br /> elevation contour maps <br /> • <br /> N IPROJECTS132721PIansarid ReportslABF Final Site Charactenzat�on Work Plan doc 6/23/98 <br />