Fax transmittal for lab report, 80 Wall Street, Jun 2002

NYC 9/11 Public Portal Document •06/14/2002 00:14 FAX 2129434641 208 APB;ENT GROUP,iNC.-LONG ISLAND (816) 60e-e271 03/15/02 1Z .ees

ambient labs inc. 159 West25th Street New York,NSf 10001 FLAP #10865

I REPORT OF AIR SAMPLE ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY Project ID: 021136 Client Name: The Otto Gerdau Company, BAI Group Project Name: 800$3 Wall Street Field ID: 211366.02

Sample ID:AEM990 0S4O1 Date Received : 9120101 Sample Description: 8th Floor Suite #805, Reception Area

Filter Composition: MC! Porosity : 0.45 micron Flit Lot U: EX65 Filter Diameter; 25 mm Effective Filter Area: 385 mrr? Air Volume; 1650 ltr Total Filter Area Analyzed; 0.0540 mmZ

0 Grid Openings: 0 Avg Grid Opening Area :0.0090 rnrr? Grid Lot# : 4083 Analytical Sensitivity :0.0.043 asbestos struct/cm3

Number of Asbestos Number of Structure Types; Structures LENGTH FIBER CLUSTER MATRIX BUNDLE Chrysatlle: 0 0.6umCL<5um 0 0 0 0 Amphibole: 0 L>5urn 0 0 0 0

A: TOTAL CHRYSOTILE STRUCTURE CONCENTRATION; LT ANYL.SENS structuc*lorn3 B: TOTAL AMPHIBOLE STUCTURE CONCENTRATION: LTANYLSENS sttiaur+elc C: TOTAL ASBESTOS STUCTURE(A+S)CONCENTRATION: LT ANYL SENS strvctvrefcrrp

TOTAL A BESTOS CONCENTRATION: IIV AIR ;.'t' AR1YL SENS + structure/crrp ON FILTER LT ANYL. SEIJ3 1 ructiireIi,m2 j Micrograph ID # for Reported Structures, None None

Reported for Ambient Labs Inc. by: }

Analysis Data: 9120/01 INNA NURiK Environmental Anatyat ° Overloaded, NA - Analyzed

NYC-WTC 000094757