NYC-WTC_000208051

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INDUSTRIAL HYGIENE ENVIRONMENTAL TESTING •EPAINVtAP 101262-0 • NY DOHiNELAC 10903 •NJ DEP77020 • AHAACCREDITATION NO. 100439 •PA DEP 06-353 •CT DPH PI+023e ■NC DENR 598 Analytical Results ANALYTICAL SERVICES for ATC Associates

WorkOrder: R02010606 Client Reference: 19125-0297

Analyte Concentration Limit of Test Date Analyzed Detection Method /Analyst (ug) : (mg/m") : (ppm) (ug) Client ID: VOC5 ATC-OI25-89M Lab ID: -OSA Date Sampled: 1/25/02 Matrix: CARBOPAK Air Vol.(L): NA

1,1.1-Tri chloroethane <20 20 OSHA7 01/31/2002 ANY 1,2-Dichloroe thane <20 20 OSHA 7 01/31/2002 ANY A Hydrocarbons, Total <20 20 OSHA 7 01/31/2002 ANY Acetone <20 20 OSHA 7 01/31/2002 ANY B Hydrocarbons, Total <20 20 OSHA 7 01/31/2002 ANY Benzene <20 20 OSHA 7 01/31/2002 ANY Chlorobenzene <20 20 OSHA 7 01/31/2002 ANY Chloroform <20 20 OSHA 7 01/31/2002 ANY Ethylbenzene <20 20 OSHA 7 01/31/2002 ANY Hexane <20 20 OSHA 7 01/31/2002 ANY Isopropylbenzene <20 20 OSHA 7 01/31/2002 ANY Methylene Chloride <20 20 OSHA 7 01/31/2002 AJMY Pentane <20 20 OSHA 7 01/31/2002 ANY Styrene <20 20 OSHA 7 01/31/2002 ANY Tetra chloroethene <20 20 OSHA 7 01/31/2002 ANY Toluene <20 20 OSHA 7 01/31/2002 ANY Tri chloroethene <20 20 OSHA 7 01/31/2002 ANY Xylenes, Total <20 20 OSHA 7 01/31/2002 ANY

(a) Analysis indicates possible breakthrough; back section result is greater than 0% 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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CITY_21MC100_003018777

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