NYC-WTC_000220263

NYC 9/11 Public Portal Document

USX Engineers & Consultants Inc. IH & Environmental Laboratories 4000 Tech Center Drive |[ REPORT OF TEST RESULTS DATE - 10/11/2001 Monroeville, PA 15146 PHONE: (412)825-2400 FAX: (412)825-2407 PAGE - 2 AIHA Accreditation #322

Customer: CD-544A AHENTION: Dave Morris P.T. & L. Environmental Services Work Requested by : Dave Morris 411 Sette Drive Phone No; : 201-262-4141 CUSTOMER P.O. # : 01-320 Paramus. NJ 07652-2912 SITE LOCATION : GREENWICH TRACKING NUMBER: 14359 UEC CLIENT ID ANALYTE DATE PUMP AIR VOL. ANALYSIS I) II S I C R Y S T A L I 11 E SILICA 10 SAMPLED TIME RATE SAMPLED DATE QUARTZ CRISTOBAL I IE TRIDYMITE L 0 I) - (mill) (LPM) (L) mg tng/m3 LOD "9 mg/m3 t mgI mg/m3 t mg rro/nO t

3?M1 79 BLANK-BLANK SILICA. CRYSTALLINE-AIR 09/24/01 10/09/01 <0.010 U/A N/A <0.010 N/A M/A <0.010 N/A H/A 0.010

32142 80 OLANK-BLANK DUST.TOTAL NUISANCE-AIR 09/24/01 10/05/01 <0.01 N/A 0.01

32142 80 BLANK-BLANK SILICA. CRYSTALLINE-AIR 09/24/01 10/09/01 <0.010 H/A M/A <0.010 H/A H/A <0.010 H/A H/A 0.010

32143 76 SILICA. BULK 09/24/01 10/09/01 1.04 0.01 0.033 3.2 <0.010 <1.0 <0.010 <1.0 0.010

32144 7B SILICA. BULK 09/24/01 10/09/01 0.96 0.01 0.065 6.0 <0.010 <1.0 <0.010 <1.0 0.010

32145 79 SILICA. BULK 09/24/01 10/09/01 0.96 0.01 0.029 3.0 <0.010 <1.0 <0.010 <1.0 0.010

32J46 56500 OUST. TOTAL NUISANCE-AIR 09/25/01 450 2. 900. 10/05/01 0.48 0.53 0.01

32146 56500 SILICA. CRYSTALLINE-AIR 09/25/01 450 2. 900. 10/09/01 <0.010 <0.011 <2.1 <0.010 <0.011 <2.1 <0.010 <0.011 <2.1 0.010

32147 56501 DUST.TOTAL MUISAHCE-AIR 09/25/01 450 2. 900. 10/05/01 0.39 0.43 0.01

32147 56501 SILICA. CRYSTALl.Itlf.-AIR 09/25/01 450 2. 900. 10/09/01 <0.010 <0.011 <2.6 <0.010 <0.011 <2.6 <0.010 <0.011 <2.6 0.010 nq

32148 56502 DUST. TOTAL NUISANCE-AIR 09/25/01 450 2. 900. 10/05/01 0.20 0.31 0.01 32140 56502 SILICA. CRYSTALLIME-AIR 09/25/01 450 2. 900. 10/09/01 <0.010 <0.012 <3.6 <0.010 <0.012 <3.6 <0.010 <0.012 <3.5 0.010 32149 55933 DUST.TOTAL HUISAMCE-AIR 09/26/01 600 1.7 1020. 10/05/01 0.79 0.77 0.01

O H k: I NUIES: * - Infonnatlon not supplied by client. < - less than. A - FILTER OR SINGLE STAGE MONITOR C - TUBE OR 2 STAGE MONITOR E - LIOUIDS OR SOLIDS J - FILTER + TUBE # - Infcrtiallon not reguesLed Dy client. H/A - Not Applicable. B - TUBE I) - BULK MATERIALS OR WIPES I - FILTER + TUBE Tice, fi.yw rate and/or sample volume data are based or client supplied Information, unless otherwise noted. O o o Io o CO

NYC-WTC_000220263