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Recology and environment,inc. <br /> 6. Quality Assurance Requirements <br /> 6.2 Analytical <br /> The following requirements apply to the definitive data quality <br /> category level as specified in ERO's QAPP: <br /> 1. Sample documentation in the form of field <br /> logbooks, appropriate field data sheets and chain-of-custody <br /> forms will be provided. <br /> 2. Initial and continuing calibrations will be documented. <br /> 3. The detection limit will be determined by the laboratories <br /> according to the method requirements, and recorded along <br /> with the data, where appropriate. <br /> 4. Analytes will be identified and quantified. <br /> 5. QC blanks will be analyzed. <br /> 6. Matrix spike recoveries will be documented. <br /> 7. Analytical error determination in the form of replicate <br /> samples must be performed on 10% of the samples. <br /> 8. Total measurement error documenting the precision of the <br /> measurement system form sample acquisition through <br /> analysis will be documented. <br /> 6.3 Data Validation <br /> Data generated under this plan will be evaluated in accordance <br /> with the appropriate criteria contained in the Removal Program <br /> Data Validation Procedures which accompany OSWER Directive <br /> 9360.4-1 or equivalent guidance. The assessment of data usability <br /> will be provided as part of the final report for this investigation. <br /> 6.4 Field Variances <br /> As conditions in the field vary, it may become necessary to <br /> implement minor modifications to sampling as presented in this <br /> plan. When appropriate, the QA program officer will be notified <br /> and a verbal approval will be obtained before implementing the <br /> changes. Modifications to the approved plan will be documented <br /> in both the sampling project report and logbook. <br /> 09:C:\MyFiles\PROJEMTrary_Tire\QASP\QASP_0339.wpd-11/30/98 6-2 <br />