NYC-WTC_000220239

NYC 9/11 Public Portal Document

J’";! NO QC EVALUATION HAS BEEN PERFORMED. DATA VALIDITY IS UNSUBSTANTIATED AND THE DATA SHOULD BE USED WITH DISCRETION 3 WTC TEDLAR BAG AIR ANALYSIS, TO-15 MODIFIED METHOD 'I DRAFT GC/MS Results for 02/20/02 T File Name NYC1103 NYC 1104 NYC1105 NYC1106 NYC1108 NYC1107 Sample Location Instrument Blank Tedlar Bag Blank Washing Tent Austin Tobin Plaza North Tower South Tower ■ * i-i- . Ambient Air Sample Number A07504 A07505 A07507 A07506 ' Sample Height Breathing Level Breathing Level Ground Level Ground Level Sample Volume 250 mL 250 mL 250 mL 250 mL . 250 mL / Reporting Limit (RL) 20 20 20 • 20 20 Sample Cone. Units ■pi®7 ppL ------ ppo;------ PpOv —iw— Propylene RL RL RL RL RL RL Chlorodifluoromelhane __ RL RL RL RL RL RL - Dichlorodifluoromethane RL RL RL RL RL ■ ; RL Dichlorotetrafluoroethane RL RL RL RL RL ' ’ RL ■ ChloFomethane RL RL RL RL RL ' RL Vinyl Chloride_________ RL RL RL RL RL • RL - 1.3-Butadiene RL RL RL RL RL : RL Bramomethane RL RL RL RL RL RL Chloroethane RL RL RL RL RL ' RL Trlchlorofluoromethane RL RL RL RL RL RL Isopropyl Alcohol RL RL RL RL RL ■ RL ■

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CITy_21MC100_002823279

NYC-WTC_000220239