NYC-WTC_000205517

NYC 9/11 Public Portal Document

MufuAL^^ WTC Occupational Exposure Limit List

Adjustment Adjustment Shift Adj. Agent Category Factor TLV PEL OEL OEL Comment Metals Welding Fume II 0 67 5 5 5 3.35 (mg/m3) PEL is for respirable dust Aluminum l-C 1 5 5 5 5 (mg/m3) TLV for metal fume PEL for respirable fraction Antimony III 0.48 0.5 0.5 0.5 0.24 (mg/m3) Arsenic III 0.48 0.01 0.01 0.01 0.0048 (mg/m3) PEL STEL = 1.0 Beryllium III 0.48 0.002 0.002 0.002 0.0010 (mg/m3) PEL C= 0.005; TLV STEL = 0.01; NIC = 0.0002 Inhalable Cadmium III 0.48 0.002 0.005 0.002 0.0010 (mg/m3) TLV for respirable; See Table Z-2 for exclusions in 29 CFR 1910.1027 Calcium 1-B 1 2 5 2 2 (mg/m3) Chromium III 0.48 0.5 1 0.5 0.24 (mg/m3) VI TLV = 0.05; VI PEL = C 0.1 Cobalt III 0.48 0.02 0.1 002 0.010 (mg/m3) Copper II 0.67 0.2 0.1 0.2 0.134 (mg/m3) Iron III 0.48 5 10 5 2.4 (mg/m3) Iron Oxide; PEL as fume Lead III 0.48 0.05 0.05 0.05 0.024 (mg/m3) Magnesium II 0.67 10 15 10 6.7 (mg/m3) As fume Manganese IV 0.67 0.2 5 0.2 0.134 (mg/m3) PEL is Ceiling Nickel III 0.48 1.5 1 1.5 0.72 (mg/m3) TLV as inhalable Selenium IV 0.67 0.2 0.2 0.2 0.134 (mg/m3) Thallium III 0.48 0.1 0.1 0.1 0.048 (mg/m3) Skin (both) Tin III 0.48 2 2 2 0.96 (mg/m3) Titanium 1-C 1-C 10 15 10 10 (mg/m3) Vanadium 1-B 1-B 0.05 0.1 0.05 0.05 (mg/m3) TLV for fume; PEL is C for fume Zinc II 0.67 5 5 5 3.4 (mg/m3) Both as fume

Aldehydes Acetaldehyde 1-B 1 25 200 25 25 (ppm) TLV is C Acrolein 1-B 1 0.1 0.1 0.1 0.1 (ppm) TLV is C Benzaldehyde 2 2 2 (ppm) TLV = WEEL: WEEL STEL = 4 Formaldehyde 1-A 1 0.3 0.75 0.3 0.3 (ppm) TLV = C: PEL STEL = 2 n-Butyraldehyde 25 25 25 (ppm) TLV = WEEL Propionaldehyde 20 20 20 (ppm) TLV = NIC for 2001 o Valeraldehyde 50 50 50 (ppm) H

L (—1 Aromatics s o o o 1^ Key: o 1. OEL = the lower of the TLV and PEL to 2. NIC = Notice of Intended TLV Change value CO WO 3. WEEL = Workplace Environmental Exposure Limit (AIHA) Page 1 3co

NYC-WTC_000205517