NYC-WTC_000206881

NYC 9/11 Public Portal Document

Liberty Mutual / ATC Measurement Data

Weekly Summary

#of #of Highest HIghdfil OSHA ACGIH Highest Result Job with Highest # of NQs % NQ Comments Week of: Agent Class Samples Analyses Analyte Result PEL TLV % of OEL Exposure

11/26/01 Total Dust/Metats 17 340 Cadmium 2.8uo/m3 Sug/ms I0uo^3 66% Of PEL Torch Cutter 198 68% 11/26/01 Reap, Dust/Sillca 13 39 Quartz 0,018 mg/m3 0.1 mg/mS* 0,05 mg/m3 36% of TLV Spotter 27 69% 11/26/01 Aromattes 7 28 Toluene 0.0036 ppm 200 ppm 60 ppm 0.0076% of TLV Torch Cutter 26 93% 11/26/01 Aldehydes 3 21 Formaldehyde 0.010 ppm 0.76 ppm 0.3 ppm (Ceiling) 1,3% Of PEL Backhoe Operator 15 71% 11/25/01 PAHs 6 96 Total PAH t 6.8 uc^ 200ug/m3 200ug/m3 3.4% Of PEL Qrappler Operator 76 78% 11/26/01 Asbestos 24 24 Fibers 0.033 f/cc 0.1 f/cc 0.1 f/cc 33% of PEL Spotter 4 17% 11/26/01 Adds 6 36 Hydrofluoric Add 0.01 ppm 3ppm 3ppm(Cefffng) 0.33% Of TLV OrapplarOperator 59 164% 11/25/01 Ozone 2 2 N/A Al "Toe Lowto Quantify" 2 100% 11/25/01 Carbon Monoxide (TWA) 26 26 Carbon Monoxide 33 ppm 50 ppm 26 ppm 132% Of TLV (abbreviated Flagman 16 58% 1 peak over NlOSH Cetlng of 200 sample - 2 hrs, 9 min) ppm (Grappler Operator) Toials: 104 612

12/1/01 Total Duat/Metals 10 202 Arsenic 1 u^m3 1Ouo/m3 10ug/(n3 10% of PEL Torch Cutter 122 60% 12/1/01 Resp. Dust/SiRca 8 24 Respirable Dust 0.34 mg/m3 6mg^3 Smg'mS 11% of TLV Equipment Operator 19 79% 12/1/01 Aromatics 12 48 Benzene 0.0032 ppm Ippm 0.5 ppm 0.64% of TLV Equipment Operator 31 85% 12/1/01 Aldehydes 6 42 FormaWehyds 0.017 ppm 0.76 ppm O.3opm(CeillnQ) 2.3% Of PEL Eqiipmert Operator 29 69% 12/1/01 PAHs 6 96 Total PAHs 17ug/m3 200ug/m3 200ug'm3 8.5% of PEL Torch Cutter 52 64% 12/1/01 Asbestos 26 26 Fibers 0.048 0.1 f/cc 0.1 f/cc 48% of PEL Spotter 5 19% 12/1/01 Adds 6 36 Sulfuric Acid 0.059 mg/m3 1 mg/mS 1 mg/fn3 5.9% Of PEL Grappter operator 31 86% 12/W1 Ozone 6 6 N/A Al "Toe Lowto Quantify 8 100% 12/1/01 Carbon Monoxide (TWA) 18 18 Carbon Monoxide 5ppm 60Fpm 25 ppm 20% of TLV Torch Ouser 14 78%

12/1/01 Hydrogen Sulfide 8 8 Hydrogen Sulfide 16 ppm 20 ppm (Celling) 10 ppm ieo%ofTLV (Area Sample) SW Comer, near south bridge 5 63% 12/1/01 Diesel Fume 11 11 Inofgante Carbon 0.075 mg/mS 3.5 mg/mS 3.5 mg/ma 2.2% of PEL Torch Cutter 1 9% Totals: 1^ 'soe'

Notei:

Tho PEL for quartz Is detormlnad by the formula PEL «10 mpm? / (% quartz +2). For Ousts with hl0h quartz contont this wjrks out to bo a quartz concentration of approximaloly o.i mo'm3.

"OEL*«■oocupabonal exposura Urntt". A senorlc term oneompessina PELS, TLVs end other workplace expos ire Bmlts.

"NQ" • "not quanUfiabie". Substance was was not present In sufficient quantity In he sample to report a flrm vaua for the concentration. All quanUflcatlon levels for the sampling molhods used are wel below occupational exposure limits.

The area aemples for hyCroqen sulfide were taken rtear suspected sources and were not representative of worker exposure. O

S O o o I o o co o co hO cn

NYC-WTC_000206881