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1.0 INTRODUCTION <br /> This Quality Assurance Project Plan (QAPP) is Site-specific and has been prepared for <br /> the Site Investigation Program at the proposed Gabriel Estates/George Kelly K through <br /> 8 School Site located at the intersection of Mabel Josephine Drive and Veneto Lane (Site) <br /> in Tracy,California. It has been prepared in accordance with the following document: <br /> i) "Preparation Aids for the Development of Category IV Quality Assurance <br /> Plans," February 1991 EPA/600/8-91/006. Prior to deviation from the protocols <br /> outlined herein, the State of California EPA project manager for the program will <br /> be notified. <br /> The objective of the QPP is to provide sufficiently thorough and concise descriptions of <br /> the measures to be applied during the monitoring, such that the data generated will be <br /> of a known and acceptable level of precision and accuracy. This QAPP provides <br /> comprehensive information regarding the project personnel responsibilities, and sets <br /> forth specific procedures to be used during sampling of relevant environmental matrices <br /> and analyses of data. <br /> The following QA topics are addressed in this Plan: <br /> i) Data quality objectives (DQOs) for measurement of data, including precision, <br /> accuracy,completeness,representativeness,and comparability; <br /> ii) project organization and responsibility; <br /> iii) sampling procedures; <br /> iv) sample custody; <br /> V) analytical procedures; <br /> vi) calibration procedures,references and frequency; <br /> vii) internal QC checks and frequency; <br /> viii) QA performance audits,system audits and frequency; <br /> ix) QA reports to management; <br /> X) preventative maintenance procedures and scheduling; <br /> xi) specific procedures to be used to routinely assess data precision, <br /> representativeness,comparability,accuracy and completeness; <br /> xii) data validation;and <br /> xiii) corrective action. <br /> 031090-10(4) -�- CONESTOGA-ROVERS&ASSOCIATES <br />