Interim Final WTC Confirmation Cleaning Study (May 2003)

Acknowledgments
Executive Summary
    1. Introduction
    1.1 Background/Objectives
    1.2 Identification of Contaminants of Potential Concern (COPC)
    1.3 Development of Clearance Criteria for Lead
    1.4 The Project Team
    1.5 Cleaning Methods
    1.6 The Work Plan
    1.7 Project Documentation
    2. Cleaning Activities
    2.1 Building Logistics
    2.2 Personal Air Sampling, Personal Protective Equipment and Safety Risks
    2.3 Equipment
    2.4 Cleaning Methods
    2.5 Mobilization
    2.6 Cleaning of Residential Units
    2.7 Cleaning of Commercial Units, Common Areas and Basement
    2.8 Cleaning of Non-Study Commercial Units
    2.9 Cleaning of Building Exterior/Roof
    2.10 Summary of Cleaning Activity
    2.11 Difficulties Encountered and Resolutions
    3. Sampling Activities
    3.1 Baseline Sampling
    3.2 Pre-Cleanup Sampling
    3.3 Sampling During Cleaning
    3.4 Post-Cleanup Sampling
    3.5 Sampling Supplies and Equipment
    3.6 Sample Analysis and Management
    3.7 Analytical Data
    3.8 Difficulties Encountered and Resolutions
    3.9 Modifications to the Study
    3.10 Supplemental Sampling Activities
    3.11 Mercury Vapor Using Lumex® Analyzer
    4. Analytical Results
    5. Discussion
    5.1 Data Sets
    5.2 Extent of Contamination
    5.3 Location of Units
    5.4 Comparison to Health-Based Benchmarks
    5.5 Cleaning Effectiveness
    5.6 Multiple Cleaning Events
    5.7 Sampling Methods
    5.8 Air Disturbance
    5.9 Filter Overloading
    5.10 HVAC System
    5.11 Observations
    5.12 Complexities
    6. Summary

Table of Contents

• Attachment A
  Personal Monitoring Data A

• Attachment B
  The Work Plan and Changes to the Work PlanB

• Attachment C
  Site Map .C

• Attachment D
  Floor Plans D

• Attachment E
  Health and Safety Plan, Changes and Issues E

• Attachment F
  Scope A- Lower Manhattan Cleaning Procedures F

• Attachment G
  Sampling and Analysis Plan G (Available upon request)

• Attachment H
  Synopsis of Cleaning Methods by Building Area and Fact Sheets H

• Attachment I
  HVAC Cleaning Procedures I

• Attachment J
  Key for Analytical Tables and Reporting of Analytical Results J

• Attachment K
  Summary of Mercury Vapor Results Using the Lumex® Vapor Analyzer K

• Attachment L
  Photo Documentation L