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9 <br /> stored on-site in drums pending laboratory analysis. When laboratory analysis are received, a <br /> Department of Transportation licensed transporter will transport the groundwater off site and <br /> dispose of it in an approved facility. <br /> Survey Existing and Proposed Wells <br /> After the installation of the wells, all wells will be surveyed relative to the elevation of a <br /> known benchmark. Additionally, horizontal locations of all well casings and selected building <br /> features will be surveyed relative'to a permanent on-site structure. All of the surveying will be <br /> performed by a registered professional surveyor. <br /> Site Safety and Health Plan <br /> The guidelines established in the October 10, 1988 Site Safety and Health Plan prepared for <br /> the installation and sampling of groundwater monitoring wells at ARCO Station 2093 will.be <br /> implemented during this investigation. <br /> Quality Assurance Plan <br /> The procedures to be followed in sample collection, identification, and handling at the <br /> ARCO site are described in the Quality Assurance Plan section of Appendix A. <br /> Laboratory Quality Assurance Program <br /> In addition to routine calibration of the instruments with standards and blanks, the analyst <br /> is required to run duplicates and spikes on 20 percent of the analyses to ensure an added measure <br /> of precision and accuracy. Accuracy is also assured through the following: <br /> 1. Certification by California Department of Health Services. <br /> 2. "Blind" samples are submitted by the laboratory's quality assurance officer on a <br /> weekly basis. These are prepared from National Bureau of Standards or EPA <br /> I' reference standards. <br /> Appendix A <br /> Appendix A provides a detailed description of the following: <br /> 1. Soil sampling during drilling <br /> 2. Borehole drilling <br /> 3. Groundwater monitoring wells <br /> 4. Groundwater sampling <br /> 5. Quality assurance plan <br /> 6. Sample handling. <br />