NYC-WTC_000202085

NYC 9/11 Public Portal Document

Mar 12 02 02:5Gp PSC HnalytiGal Services 6103219667 p. 33

INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING •E,°A/hVLAP1O12e2-O • NY DQHAIELAC 109D3 • NJOEP P.H02O ■AIHAACCREDITATIONNO.10043S • PA DE.’OS-353 • CT DPH PH-0238 ■NCDENft599

ANTALYTICAT SERVICES Analytical Results for ATC Associates WorkOrder: R02020848 Client Reference: 19125-0297

Analyte , Concentration Limit of Test Date Analyzed Detection Metlicd /Analyst (ue) ; {mg/m’) 1 (ppm) (ug) Client ID: S7 ATC-0221-M89 Lab ID: -07,A Date Satnpled: 2/21/02 M2trix: AirVol.(L): 1020 Total Particulate Matter <50.0 <0.0490 50 N05Q0 03/01/2002 ADM

Crystalline Silica <10.0 <0.00980 10 Crystalline Silica 03/01/2002 ADM

Client ID: SS ATC-0221-M89 Lab ID: -OSA Date Sampled; 2/21/02 Matrix; AirVoI.(L); 1020 Total Particulate Matter <50.0 <0.0490 50 NQ500 03/01/2002 ADM

Crystalline Silica <10.0 <0.00980 IQ Crystalline Silica 03/01/2002 AD.M

Client ID: S9 ATC-0221-MS9 Lab ID; -09A Date Sampled; 2/21/02 Matrix; AirVol.(L): 1020 Total Particulate Matter <50.0 <0.0480 50 N050O 03/01/2002 ADM

Crystalline Silica <W.O <0.00980 10 Crystalline Silica 03/01/2002 ADM

Client ID: S10 ATC-0221-M89 Lab ID: -lOA Date Sampled: 2/21/02 Matrix: Air Voi.(L); 1020 Total Particulate Matter <50.0 <0,0490 50 N0500 03/01/2002 -ADM

Crystalline Silica <10.0 <0.00980 10 . Crystalline Silica 03/01/2002 . ADM

Client ID: SI I ATC-0221-MS9 Lab ID; -11A Date Sampled: 2/21/02 Matrix: Air Vol.(L): NA Total Particulate Matter <50.0 50 ND500 03/01/2002 ADM

Crystalline Silica <10.0 10 Crystalline Silica 03/01/2002 ADM

(a) Analysis indicate!; possible breakthrough; back section result is greater than % of the front section result.

General Notes: <: Less than the indicated limit of detection (LOD). Information not available or not applicable. Back sections were checked and showed no significant breakthrough.

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