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M � <br /> B-3 <br /> i <br /> 2.5 Motutonng Well Development <br /> After the monitoring well has been installed, the monitoring well is developed with a surge block and <br /> centrifugal pump until the water produced is relatively sediment-free and until the conductivity, pH, and <br /> temperature stabilize If the well is pumped dry during the development process, recharge rates will be <br /> recorded No water or chemicals will be introduced into the monitoring wells during well development <br /> All developed water is placed in drums on site for later transport and disposal to a permitted facility <br /> 2.6 Ground Water Sam lin <br /> Three to five wetted casing volumes of liquid will be removed from the well by bailing with a clean <br /> disposable bailer A liquid sample is then collected from the well with a cleaned disposable bailer Each <br /> sample is appropriately labeled and stored on ice from the time of collection through the time of delivery <br /> to the laboratory Ground water samples are transported to the laboratory and analyzed within the EPA- <br /> specified holding times for the requested analyses <br /> 2.7-Liquid-Phase Petroleum <br /> • If liquid-phase petroleum is present in the well, the thickness of the petroleum layer is measured by using <br /> appropriate fluid-level sounding equipment <br /> 3.0 ANALYTICAL PROCEDURES <br /> Selected soil samples submitted to the laboratory are analyzed for BTEX, MTBE and TPH as gasoline, <br /> and diesel using EPA Methods 8020 and 8015 Modified, respectively Ground water samples submitted <br /> to the laboratory are analyzed for the same constituents as the soil samples <br /> 4.0 QUALITY ASSURANCE PLAN <br /> This section describes the field and analytical procedures to be followed throughout the investigation <br /> 4.1 General Sample Collection and I3andhm Procedures <br /> Proper collection and handling are essential to ensure the quality of a sample Each sample is collected <br /> in a suitable container, preserved correctly for the intended analysis, and stored prior to analysis for no <br /> longer than the maximum allowable holding time Details on the procedures for collection and handling <br /> of soil samples used on this project can be found in Section 10 (Methods) <br /> LRP002 066 <br />