Document N2ywy5mkM3wRprgdvnM78gNxb

Sample Number ALHV-1 Sample Volume 3 (cubic meters, hi ) 89.0 ALHV-2 125.7 Table 2 Allied Brake Shop Air Sample Results Trace Metal Analysis Sample Location Brake Service Area General Shop Area Pb 4.04 1.27 3 Trace Metal Concentration yg/m Zn Cu Fe Mn 0.74 0.27 18.00 0.21 2.07 0.17 12.72 0.18 Cr 0.11 0.07 Limit of Detection (yg/sample) Lead Zinc Copper Iron Manganese Chromium 4 5 2 4 2 3 OSHA Standard :(yg/m Lead Zinc oxide fume Copper dust Iron oxide fume Manganese Chromium metal 50 5,000 1,000 10,000 5,000 1,000 (TWA) (TWA) (TWA) (TWA) (ceiling) (TWA) NIOSH Recommended Standard (yg/m ) 100 (TWA) 5000 (TWA) None None None None