Certificate of Laboratory Analysis for lead air samples, Sept 2001

NYC 9/11 Public Portal Document

104 Elden Street Phone: 703 • 471-4200 Herndon, Virginia 22070 Facsimile: 703 • 471-0020

HP ENVIRONMENTAL INCORPORATED

Certificate of Laboratory Analysis ET Environmental, Inc. Date Received 9/23/01 Report Number 014885 Attn: George Pineda 3424 Peachtree Road, Suite 200 Date Reported 9/26/01 Page 2 of 3 Atlanta, GA 30326 Project Location Project 7600: World Trade Center, NY, NY

4. Client Sample No.: WTC-0923 01-04Pb HPE Sample No: 014885-04 Sample Matrix: Air (637 liters) Date Collected: 9/23/01 Sample Location: North side of Building 7, inside basket

Test Requested: TAL Metals • EPA 200.7 Analyte Result Units PQL Aluminum 47 pg/ni3 12 Antimony <0.5 lig/in3 0.5 Arsenic <0.5 pg/m3 0.5 Barium <0.5 pg/m3 0.5 Beryllium <0.5 pg/m3 0.5 Cadmium <0.5 pg/m3 0.5 Calcium 51 pg/m3 30 Chromium 0.75 pg/m3 0.1 Cobalt <0.5 pg/m3 0.5 Copper 22 pg/m3 6.0 Iron 39 pg/m3 6.0 Lead 15 pg/m3 0.5 Magnesium 7.5 pg/m3 30 Manganese <0.5 pg/m3 0.5 Mercury Pending pg/m3 0.5 Nickel <0.5 pg/m3 0.5 Potassium 2.3 pg/m3 1.0 Selemium <0.5 pg/m3 0.5 Silver <0.5 pg/m3 0.5 Sodium 260 pg/m3 30 Thallium <0.5 pg/m3 0.5 Vanadium 4.5 pg/m3 3.0 Zinc 34 pg/m3 1.0 Bismuth <0.5 pg/m3 0.5 Date Analyzed: 9/25/01 Analyst: SunB. Cambron

. OS.002377

CONFIDENTIAL, CITY_21MC100_003416378 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000174988