NYC-WTC_000204890

NYC 9/11 Public Portal Document

Measurement Data Weekly Summary Februaiy 2 to February 8.2002

Start End Highest % #Less % Less Report Report « Samples Hof Highest Shift Adj. of Shift Job than Half than Half Period Period Analyte Class Collected Analysis OEL %OEL OEL Adj. OEL Analyte Description #NQ'8* %NQ's OEL OEL Laborer Hand Jack Hammering 2/4/2002 21B/2O02 Silica 16 32 0.05 2200.00% 0.025 4583% Quartz WTC6 26 81% 28 88% Haul truck operator in Diesel E/diaust depression Tower 2/4/2002 2/8/2002 Diesel Fume 8 8 0.02 117.50% 0.02 118% Particulates #1 0 0% 5 63% Spotter In depression N. 2/4/2002 2/8/2002 Asbestos 17 17 0.1 43.00% 0.05 86% Asbestos Tower V17 1 6% 17 100% Torch Cutter in Depression South 2/4/2002 2/8/2002 Adds 5 30 1 35.70% 1 1% Sulfuric Add Tower 1 25 83% 30 100% Torch in Depression @2 2/4/2002 2/8/2002 Ozone 6 6 0.08 20.69% o.oe 21% Ozone WTC 5 83% 6 100% Torch cutter in depression on 2/4/2002 2/8/2002 Metals 7 145 0.002 13.54% 0.001 1% Cadmium level Bl 76 52% 140 97% Spotter by e»l 2/4/2002 2/8/2002 Sulfides 10 10 2 1.25% 2 1% Sulfur DioMde from Vesey St 9 90% 10 100% Spckter on Surface at Church 2/4/2002 2/8/2002 Mercury 7 7 0.025 0.96% 0.017 1% Mercury & Vesey 7 100% 7 100%

(400% Dose) Auto jackhammer 2l2JZXa 2/8/2002 Ndse 14 14 90dBA 100 dBA n/a n/a Noise operator n/a n/a 10 71%

25 TWA 244% TWA Carbon Torch cutter at B1 2/2/2002 2/8/2002 Carbon Monoxide 16 16 200 Peak 153% Peak 17 359% Monoxide level of WTC 6 n/a n/a 13 76%

Notes:

* All Quantification levels for the sampling methods used were well below OELs. o H K I

S o o o Io o co o (71 co o Pagel to c»

NYC-WTC_000204890