Quality Assurance Guidance for Conducting Brownfields Site

0,37

MB

Assessments

75

stron

2549

ID

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

1998

rok

TABLE OF CONTENTS

Executive Summary . ES-1

Section 1. Introduction . 1

Section 2. Brownfields Site Assessments . 3

Brownfields Site Assessment Purpose . 3

Brownfields Site Assessment Process . 3

Section 3. Data Quality Objectives 5

The DQO Process 7

Step 1: Stating the Problem. 7

Step 2: Identifying the Decision . 9

Step 3: Identifying Inputs to the Decision . 10

Step 4: Defining the Boundaries of the Study 11

Step 5: Developing a Decision Rule . 11

Step 6: Specifying Limits on Decision Errors 12

Step 7: Optimizing the Design . 13

Estimating Costs 14

Section 4. Quality Assurance Programs & Sampling Design Strategies . 15

Quality Assurance . 16

Quality Control . 16

Sampling Design Strategies 17

Multi-phase Investigations . 20

Types of Samples 20

Background Samples 21

Analytical Methods . 21

Quality Control in the Field 23

Field Instrument/Equipment Inspection and Calibration . 23

Field Documentation 24

Field System Audits 24

Quality Control in the Laboratory . 24

Quality Control Samples 25

Document Control . 26

Deliverables for Data Useability Review 27

Improving Data Useability . 28

Summary 28

Appendix A - Model Quality Assurance Project Plan A-1

Appendix B - Glossary of Terms B-1

Appendix C - References C-1

Exhibit 1 - Brownfields Site Assessment Process

Exhibit 2 - Summary of the DQO Process

Exhibit 3 - Comparison of Preliminary Assessment and Due Diligence Site Assessments

Exhibit 4 - The Springfield Site

Exhibit 5 - Number of Samples Required to Achieve Given Rates of False Positive and Negative,

and

MDRD

Exhibit 6 - Types of QC Samples