Document 6bv4mdnwG1O43Vx5yr08dzNrd

ABD00228192 M^rK A 4 ABERDEEN CHEMICAL PLANT o INDUSTRIAL HYGIENE MONTHLY REPORT Month: July, 1986 Date of Report: Sept. 16, 1986 I. ROUTINE CHEMICAL DOSIMETRY All Sample Results CHEMICAL < PEL NO. % >PEL (OVEREXPOSURES) NO. % VCM Lead Total Particulates 81 100.0 17 85.0 9 100.0 0 3 0 0.0 15.0 0.0 Overexposures JOB CLASS Color Weigh Compounder EXPOSURE k 38.6 Micrograms Lead/M'* SOURCE Employee overexposed while weighing up small amounts of Cyastab 523 for Compound Line V in the Color Weigh Room. The employee's recent overexposures, including the two below (extra samples taken during investigation), have been related to work practice changes caused by Line V startup. Corrective measures are being taken. Color Weigh Compounder 211.6 Micrograms Lead/MJ Employee overexposed while weighing up Cyastab 564 in the Color Weigh Room. Color Weigh Compounder 79.9 Micrograms Lead/MJ Employee overexposed while weighing up Cyastab 564 in the Color Weigh Room. * Respiratory protection was worn. II. OSHA ASBESTOS STANDARD The following steps have been taken to comply with the new OSHA asbestos standard: - Two kits were ordered to allow conversion of two, existing 3M airhats to "high efficiency". - A supply of asbestos hazard warning labels was ordered and received. ABD00228193 Industrial Hygiene Monthly Report Page 2 II. OSHA ASBESTOS STANDARD - continued - CTEK, Inc. confirmed that they can perform asbestos-in-air analysis in compliance with the standard and provided the plant with a small quantity of asbestos sampling filters. - Revision of the plant's asbestos handling program was begun. III. COMPOUND VENTILATION Collection hopper buildup was shown to seriously lessen total airflow through the building ventilation system. As a result, production began placing more emphasis on routinely checking and documenting: - Collection hopper emptying - "Pulse Air" performance - Magnahelic gauge readings - Individual hood airflows, using the department's miniature velometer. A variety of spot checks was made during the Line I modernization work to assist Engineering in obtaining an optimum air balance. IV. LEAD/TOTAL PARTICULATES DOSIMETRY Compound Line V workers were incorporated into the existing lead/total particulates dosimetry program. V. SHORT-TERM EXPOSURES Four, short-term VCM exposure measurements were made during the blanking of the 741 and 742 reactors. The measurements were made with REAL "Minimonitors" worn by three mechanics as they performed the work. A separate report summarizing these and previous results will be made. Mechanic Sample Time (Min.) TWA Result (ppm, VCM) A 200 0.1 B* c * D 198 185 205 0.2 1.0 1.4 * Mechanics C and D, besides helping blank out the tops and bottoms of the reactors, also, unlike Mechanics A and B, blanked out chemwash lines. The chemwash line to 742 had VCM trapped inside. A series of short-term VCM exposure measurements during blend tank top opening was also begun. The measurements, also made with REAL "Minimonitors", were taken with the badges being worn by dryer operators as they opened blend tanks during reactor slurry dumping. ABD00228194 Industrial Hygiene Monthly Report Page 3 Operator A Resin 5305 Blend Tanks 646 & 647 Sanple Tine (Min.) 3.0 TWA Result (ppm, TOO 14.2 Wind Conditions S to N, 0-5 MPH B 5305 646 & 647 3.5 30.7 tW to SE, 0-5 MPH C 5305 646 & 647 3.0 35.4 NE to SW, 0-5 MPH A concurrent area survey was made in each case, using an "Photoionizer". In all three cases, no detectable amount of VCM was found in the immediate, adjacent areas of the building roof. Reliable measurement near the blend tank manways was impossible because of high humidity conditions made worse by water vapor from the manways. Additional samples are planned. c: JF, JWW, DWH, PJK, WFH, TFL, VEM, RAF, AHS, CWT Tom Grumbles, J. R. Drumwright, M.D. - Houston I. ABE&L PLANT CHEMICAL DOSIMETRY TRENDS