Đánh giá rủi ro được thiết kế để tính toán trang web, hoạt động, hoặc cơ sở cho các rủi ro cá nhân hóa chất và hỗn hợp hóa học. Khi môi trường phát hành của hóa chất hoặc tiếp xúc được biết đến hoặc nghi ngờ để có xảy ra, mẫu môi trường có thể được Được phân tích và thu thập mẫu để xác định chất gây ô nhiễm hóa học và quantitate Mức dư lượng. | CHAPTER 11 Analytical Quality Assurance Quality Control for Environmental Samples Used in Risk Assessment Wayne Mattsfield and David A. Belluck CONTENTS I. II. Effective Use of Analytical QA QC for Risk III. The Role of Analytical QA QC in Risk Assessment Preparation Review and A. Project B. From Sampling to Data C. Blanks. .287 D. Choosing Laboratory Analytical E. Where Analytical QA QC is Used in Risk Assessment F Quality Assurance Project Plans QAPPS .297 IV. Effect of Data Quality on Data Usability in Risk V. I. INTRODUCTION Risk assessments are designed to calculate site activity or facility risks for individual chemicals and chemical mixtures. When environmental releases of chemicals or exposures are known or suspected to have occurred environmental samples can be collected and chemically analyzed to identify and quantitate sample contaminant residue levels. Regardless of where or how an environmental sample is taken and 277 2001 by CRC Press LLC 278 A PRACTICAL GUIDE TO ENVIRONMENTAL RISK ASSESSMENT REPORTS its chemical composition analyzed it must meet defined quality parameters or its usefulness is questionable. Sufficient data of known quality must be used in a risk assessment to ensure that risk assessments properly reflect site activity or facility risks. Environmental sample quality assurance and quality control is a major focus of chemists and risk assessors during the planning and early phases of the risk assessment process. . EPA recognized the importance of data quality for risk assessment by noting that its quality assurance program goal is to ensure that all data be scientifically valid defensible and of known precision and accuracy to withstand scientific and legal challenge relative to the use for which the data are obtained. Environmental sampling and analytical chemistry work should proceed after
