Document DG3MD6RdkKBDR7Bdb0NN0rNLa

OFFICE COPY INDUSTRIAL HYGIENE REPORT TEXAS OPERATIONS DOW CHEMICAL U.SA AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY U? v\3 I5S40 TITLE: ASBESTOS MONITORING AT PLANT A POWER GENERATION, A-1517, BOILER #3, W9JJ..-WK, \QAA AUTHOR(S) C.R. HINDMAN REVIEWER(S) T.W. PARSONS Q, . iXw^-dLvv-Lia-^O TIP (3*!***-- SUMMARY Personal and area asbestos monitoring was performed inside and around boiler #3 during maintenance at Plant A Power Generation, A-1517 in March and April, 1990. All measured asbestos concentrations were well below the OSHA Action Level of 0.1 fiber per cubic centimeter for the Welders doing repairs inside the boiler. The highest potential personnel measurement was 0.011 f/cc. The measured area concentrations were less than 0.01 f/cc, well below the OSHA Action Level for an eight hour time weighted average. The data indicates that asbestos exposures and area concentrations are well controlled in and around the boiler. ST007T.li CD cr\ DISTRIBUTION C. K. Browdy, M.D., B-101 M. L. Clothier, B-101 0. E. Cragar, B-101 G. W. Engdahl, 1803, Midland S. M. Hazlewood, A-1501 J. E. LeBeau*,1803, Midland M. E. McDonald, B-101 L. W. Rampy*, 1803, Midland M. G. Swank, 1803, Midland J. L. Tiller, A-1517 RESTRICTED FOR USE WITHIN HE DOW CHEMICAL COMPANY ONLY IHS File A15-3629 TABLE I SUMMARY OF PERSONAL ASBESTOS MONITORING PLANT A POWER GENERATION, A-1517, 1990 JOB CODE / CLASSIFICATION EMPLOYEE NUMBER DATE SAMPLE TIMEImin) TWA CONCENTRATIONS (fZcc j WELDER (21300000) WELDER 140160 140051 3/22/90 3/22/90 300 0.011 330 0.004 AVG = 0.008 Action Level = 0.1 ST0075437 IHS File A15-3629 AREA TABLE II AREA ASBESTOS MONITORING INSIDE BOILER #3 PLANT A POWER GENERATION, A-1517, 1990 SAMPLE NUMBER DATE SAMPLE TIME (MIN) CONCENTRATION (fibers/cc) TWA 2nd floor, left side by gas burners in vent opening 4437 3rd floor, opposite side of boiler where 2 employees are working 4441 Wind box 4408 50 ft. from boiler #3 on turbine deck 4409 East of boiler #3 4410 Drum area 4411 3/22/90 330 3/22/90 330 4/04/90 4/04/90 4/04/90 4/04/90 419 464 457 465 0.002 0.007 0.001 0.002 0.001 0.001 to --- i o CO --I on GO CD