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4.0 DATA QUALITY OBJECTIVES <br /> DQOs have been established for the data collection activities associated with the characterization <br /> of soil and groundwater conditions so that the data collected are of sufficient quality for their <br /> intended use. Data quality objectives (DQOs) are used as a decision-making tool to define <br /> specific data needs and uses. DQOs specify the data type, quality, quantity, and uses needed to <br /> make necessary decisions. Consultant Project Manager will evaluate the project DQO's to <br /> determine if the qualitative and quantitative needs of the sampling and analysis program have <br /> been met. The establishment of DQOs is a seven-step process (USEPA, 2000) as follows: <br /> 1) State the Problem: The purpose of the sampling program is to assess the lateral extent of <br /> VOC-contaminated soil at the LNC site and to evaluate the viability of soil vapor <br /> extraction as a possible remediation technology based on pilot test results. Previous <br /> investigations have identified VOC-contaminated soil and groundwater in the LNC site <br /> area. <br /> 2) Identify the Decision: The data will be used to evaluate the problem and also to evaluate <br /> pilot test results in the LNC site area. <br /> 3) Identify Inputs to the Decision: Inputs to the decision will include results of analytical <br /> testing of soil vapor and groundwater samples from locations within the LNC site area as <br /> well as physical parameters monitored during pilot testing. Soil sample analytical data will <br /> not be utilized as these data are not particularly suitable for evaluating VOC sites. Each <br /> medium will be tested for VOCs using USEPA Test Method 8260B for groundwater and <br /> USEPA Method TO-15 for soil vapor samples,both of which are gas chromatography/mass <br /> spectrometry(GC/MS) methods. <br /> Environmental/LNC/workplan/Appendix3.wpd 5 <br />