NYC-WTC_000203533

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ANMVnCAL INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING •NJOEPPAOaO •EP« PA-00136 •NY DOH/NetAC 10908 .4IHA AOCR60ITATI0NN0.100439 ‘PA OCP 06-333 •CT DPH ph-0238 4419 Pttttsvfll* Pile* Reading, PA 1IMS •rMCD8slR539 (T«0 »10-9Z1-«e33 (fax) Sla.321-J«»7 Analytical Results for ATC Associates WorkOrder: R02110470 Client Reference: 19125-0279

Analyte Concentration LiiM)t of Test Date Analyzed Detection Method /Analyst (ug) ; (mg/mQ .' (ppm) (ug)

Client ID: ATC-lin-234M-SI Lab n>: -01A Date Sampled: 11/13/200 Matrix: Filter AlrVoI.(L): 1020 Respirable Particulate Matter <50.0 <0 0490 50 N060O 11/21/2002 SUB

Silica (Quartz Total) <10.0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

Client ID: ATC-1113-234M-S2 LabED: -02A Date Sampled; 11/13/200 Matrix: Filter Air Vol.(L): 1020 Respirable Particulate Matter <50 0 <0 0490 50 N0600 11/21/2002 SUB

Silica (Quartz Total) <10 0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

Client ID; ATC-1113-234M-S3 LablD; -03A Date Sampled: 11/13/200 Matrix: Filter AirVol.(L): 1020 Respirable Particulate Matter <50 0 <0.0490 60 N0600 11/21/2002 SUB

Silica (Quartz Total) <10.0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

Client ID: ATC-l 113-234M-S4 Lab ID: -04A Date Sampled: 11/13/200 Matrix: Filter AirVol.(L): 1020 Respirable Particulate Matter <50 0 <0.0490 50 N0600 11/21/2002 SUB

Silica (Quartz Total) <10.0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

Client ID: ATC-1113-234M-S5 Lab D); -OSA Date Sampled; 11/13/200 Matrix: Filter AirVol.(L); 1020 Respirable Particulate Matter <50 0 <0 0490 50 N0600 11/21/2002 SUS

Silica (Quartz Total) <10.0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

Client ID: ATC-1113-234M-S6 Lab ID: -06A Date Sampled: 11/13/200 Matrix: Filter AirVol.(L): 1020 Respirable Particulate Matter <50 0 <0.0430 50 NOSOO 11/21/2002 SUB

Silica (Quartz Total) <10.0 <0 00980 10 AIRBORNE SILICA 11/21/2002 SUB

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NYC-WTC_000203533