Document Lo3K0mo3bevXm3g53yNBE2oX

Barry Castleman's DuPont File CD-ROM Document # DP DATE / ? Type of Document - published report from journal - published report from conference - published abstract from conference - unpublished report - unpublished presentation - meeting agenda minutes report - letter \^/ memo - government report - industry warning information - book excerpt - legal deposition of - notes of BC on 06/02/68 _ *fell** 15:30 1 302 656 5875 JACOBS CRVMPLAR E. I. OU P0MT DE NSMOWW & COfttMMV Wilmington. Oslawahc imm @002 a*y l^r'M cnoihecvunO departmeny May 2, 1968 The following procedure was issued on April 5, 1968, to Du Pout's Field Project Managers at its various Construction sites. SAFETY - DUST CONTROL In order to assure atmospheric conditions in insulation fabrication shops which will not contribute to the employees' health problems when working with asbestos fiber-containing materials, the Construc tion Division is initiating the following permanent air quality control program to be effective June 1, 1968. Air Monitoring Environmental air monitoring shall be conducted to provide quanti tative data Tor site evaluation of dust control efficiency and assure conformance with established Threshold Limit Values (TLV). 1* The Threshold Limit Value for total dust count shall be 500,000 particles per cubic ft. of air. 2. Personnel monitoring will be conducted in the .insulation shops on site locations. One employee will be requested to wear the air sampler one eight-hour day each month. 3. Trained site safety personnel 3hall be responsible for the control, operation and adjustment of the air sampling instrument, recording required technical data associated with the air sample, mailing of air sample to laboratory for analysis and compiling records of analysis reports. 4* When soliciting participation in the air montorin|; program, craft supervision and Safety Engineer should anticipate who will be involved in work which will produce the greatest oust exposure for what day of that month. * rr-rc* tninm roe rrree uwm ... mmvdN wntmw 06/02/98 16:24 TX/RX NO.2222 P.002 06/02/98 15:30 &1 302 656 5875 JACOBS CRUMPLAR 2 &003 J 3 V Air Monitoring (Continued): 5. The personnel air sampling instrument used shall be a Universal Industrial Equipment Co,, Millipore filter " C Model 440B (qualified for explosion hazard areas) air sampler. The filter used shall be an .8 micron pore size, Millipore Cat. Mo. MAWG 037 AO, Type AA, in plastic holder. This equipment will be assigned to the sites where oir monitoring is required by the Division Safety Office. r 6. The filter in plastic holder, upon completion of air sampling, shall be mailed by the site Safety Engineer to Morton Corn, Fh.D*, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15213# attention Felix Stein. A phase microscopy analysis of submitted sample will be made and a report submitted to the site and the Division Safety Office indicating: (a) fibers below 5 micron length, lb) fibers above 5 micron length, and (c) total number of particles. Reports indicating total particle count to be approaehing or above the TLV will require determining cause of condition and taking corrective action to reduce particle count. After improvement has been applied, a second eight-hour sample shall be con ducted, analyzed and documented* Atmospheric Dust Control The application of the following recommendations should demonstrate^ conformance with the established dust TLV and provide effective ' du3t emission control. 1. Materials containing Crocidolite asbestos fiber shall not be purchased or accepted for use. Materials containing c Chrysotile and Amosite asbestos fibers are acceptable for U3e* 2. The pressure spray application of materials with any per cent of asbestos fiber content shall be eliminated. c 3. All power tool and equipment operations shall be isolated from other shop facilities and fabricating operations. 06/02/98 16:24 TX/RX NO.2222 P.003 08/02/98 15:30 0*1 302 858 5875 JACOBS CRUMPLAR ~J- Atmospheric Dust Control (cor.-:inucd) @004 Y I*. All power 3hop equipment shall, when operated, have installed exhaust ventilction of sufficient capacity to remove dust particles at point of origin. Exhausted dust particles shall be collected by on effective col lector system which will not allow vent-off of dust , particles to the atmosphere. 5. Present controlled shop cleanliness programs shall be expended. A vacuum clearer should be used in lieu of broom sweeping to remove lust particles from shop equipment work tables, ledges, floors, etc. 6# A controlled materials hardline program should be adopted to eliminate theemission of dust; for example, when opening and removing materials from shipping cartons or in the handling and mixing of asbestos cements. Respiratory Protection Severe or isolated condition* may require that respiratory protective devices be used* Consideration should be made for adequate protection of people in adjacent areas to the work location producing this condition. A supplied air respirator or a filter respirator manufactured by Mine Safety Appliance Co., Pitta fc;u*g!t, Pa*, Model Bustfoe 77 with filter number BM 21 B-9~ should be used. Tour usual cooperation Is anticipated in administering these dust controls. . CONSTRUCTION DIVISION /S/ K, E* Keuper - Division Safety Superintendent 06/02/98 16:24 TX/RX NO.2222 P.004