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WKP Air Sample Analysis Report for WTC Sampling, Apr 2002

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Laboratory report detailing phase contrast microscopy results for airborne fiber counting at the World Trade Center site dated April 11, 2002.

NYC-WTC_000161744–000161746

Folder label: “WTC- Air Data

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NYC 9/11 Public Portal Document

LABORATORIES, INC AIR SAMPLE ANALYSIS REPORT PHASE CONTRAST MICROSCOPY

CLIENT; WARREN & PANZER ENGINEERS, P.C. TURNAROUND TIME 24HRS WKPFILE# 501-01 SAMPLE DATE 4/10/02 WKP LOG I.D. # N020458 RECEIVED DATE 4/10/02 Contract#: WTCAR2 ANALYSIS DATE 4/11/02

REPORT DATE 4/11/02 CLIENT JOB: NYC Department of Environmental Protection

CLIENT JOB#: 1079.01.01

LOCATION WTC Sampling

AIRBORNE FIBER COUNTING, PHASE CONTRAST MICROSCOPY, NIOSH 7400. NIOSH PAT Lab ANALYSIS: NO. 07186; NY STATE ELAP Lab NO. 11251. 25 mm MCE Filter Cassette: Collection Area = 385 sq mm; COLLECTION DEVICE: Field Area = 0.00785 sq mm.

SAMPLE WERE COLLECTED BY; Benny Giambrone

SUMMARY OF ANALYSIS

CLIENT VOLUME FIBERS/ SAMPLE# Site# SAMPLE LOCATION (LITERS) sq mm FIBERS/ cc 1079.01.01 001 8 West Street and Warren Street 675 8.9 0.005 002 4 River Terrace and Chambers Street 675 1.3 <0.004 003 6A River Terrace Park Area Between Park Place and Warren Street 675 0.0 <0.004 004 9 River Terrace and Park Place West 675 2.5 <0.004 005 17 River Terrace and Vesey 675 2.5 <0.004 006 7 Warren Street and North End Avenue 675 0.0 <0.004 007 10 North End Avenue Park place West 675 6.4 0.004 008 Blank 0.0 009 Blank 0.0

NOTES: 1.5.5 fibers/100 fields was used to calculate the limit of detection (LOD). Results below the LOD have no statistical validity. 2. Samples were not collected by WKP Laboratories, Inc.

4. PCM air samples will be disposed of after 3 months unless otherwise directed by client in writing.

DM

LABORATORY ANALYST LABORATORY DIRECTOR

NYC-WTC_000161744

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NYC-WTC_000161744Source: NYC Law Department, mirrored locally

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WKP Laboratories inter-company invoice, April 2002 · Box DEP Box 42

NYC-WTC_000161740

Laboratory invoice for PCM and PLM analysis services with sample receipt date April 8, 2002, documenting analysis turnaround options and quantities for WTC-related testing.

10 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.949

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