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Pace Analytical Services, Inc. 1700 Elm Strest, Suite 200 ^ace Analytical" REPORT OF: CHEMICAL ANALYSES Minneapolis, MN 55414 Phons: 612.607,1700 www.pacelabs.com Fax: 312.607.6444

PROJECT: PCDD/PCDF ANALYSES DATE: December 3, 2001

ISSUED TO: ATC Associates REPORT NO: 01-1051099 Attn: Mr. Jim Cohn 104 East 25th Street, 10th Floor New York, NY 10010

INTRODUCTION

This report presents the results from the analyses performed on four samples which were submitted by a representative of ATC Associates. The samples were analyzed for the presence or absence of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) using a modified version of USEPA Method 8290 as described below.

SAMPLE IDENTIFICATION

Client ID Sample Type Date Received Pace ID

ATC-1 114-DX-01 Wipe 11/15/01 103142899 ATC-1 114-DX-02 Wipe 11/15/01 103142907 ATC-1 114-DX-03 Wipe 11/15/01 103142915 ATC-1 114-DX-04 Wipe 11/15/01 103142931

METHODOLOGY

Sample Extraction

Each sample was spiked with ’^Cij-labeied PCDD/PCDF internal standards (Table 1) and extracted with toluene in a Soxhlet extractor. The extract was quantitatively transferred to a Kuderna-Danish concentrator, concentrated, and solvent exchanged to hexane. The hexane extract was then spiked with 2,3,7,8-TCDD-^^C14 enrichment efficiency standard (Table 1) and processed through the analyte enrichment procedures described below.

REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.

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NYC-WTC_000182791