Document MG2kOVNYd0BwY73rX8GyyQX77

INTERNAL CORRESPONDENCE CHEMICALS AND PLASTICS * >.vi.cn .ncatit.", Zcpy to Mr. W. T. Shelton 704 Shop Mr. G. F. Hurley Mr. G. C. Merz Mr. M. E. Perry Mr. H. L. Robinson P. O. BOX 8361, SOUTH CHARLESTON, WEST VIRGINIA 25303 0a1e November 27, 1978 oep.. Technical Center IH/EP Syb Asbestos - Stripping Old Insulation PROJECT Survey for asbestos exposure of insulator stripping insulation from Dowtherm lines in Building 707, Cell 3. SUMMARY Good work practices and proper housekeeping by insulators kept the exposure to asbestos fibers at a minimum. Less than 0.20 fibers/cc > 5 pm - TWA for eight hours. The insulation was wet down with a water hose and the dismantled material was labeled and bagged for disposal at the landfill. DISCUSSION A large stripping job of old insulation con taining asbestos fiber was started on November 16, 1978, in Cell 3 of Building 707. The lines serviced a Dowtherm heater and ran through three levels of the cell floor. To facilitate the removal of this insulation containing asbestos, it was recommended that the piping be removed with the insulation intact and stripped at the Insulators' Shop. To remove the pipe, flanges and couplings had to be stripped of insulation for the pipefitters and riggers to unbolt and remove the lines from the cell. Mr. R. Raines, an insulator (wearing an organic vapor respir ator), made the necessary openings in the insulation for removal. The insulation was wet down before cutting and the stripped mate rial was bagged and labeled for disposal. When the lines are dismantled and removed from the cell and transported to the shop area, additional personal and area samples UCC 024355 2 of the ambient air will be collected and analyzed for asbestos. The exposure was well below the TWA of 2 fibers/cc and a ceiling value of 10 fibers/cc. RESULTS DATE 11/16/78 PERSONNEL TIME-MIN-LITERS/AIR R. Raines* 1252-1345 = 53/95.4 11/16/78 R. Raines* 1345-1425 = 40/72 TWA = 1,05 x 93 = 0.20 fibers/cc >5 pm 480 EXPOSURE FIBERS/CC >5 urn 0.44 0.61 Willson 122510 Half-face respirator. REFERENCES Volume 38C-29X4-Rla Asbestos Dust Determina tion by Membrane Filter Technique Using Phase Contrast Microscopy. REPORT PREPARED BY G. W. Bott Technical Center Industrial Hygiene Department GWB/sc G. W. Bott UCC 024356 sampling data TV'PE 8Z - BREATHING ZONE P . PERMANENT STATION 0 OPERATIONAL TASK A . AMBIENT S SOURCE METHOD CTCAR30N TUBE Mi MIDGET iMPINGER FC - FILTER CASSETTE 0- GRAS DT DETECTOR TUBE CRI - DIRECT READING INSTRUMENT RATE UNIT CCM CC PER MINUTE ..PM - 1 ITERS PER MINUTE C:M-CUBIC FEET PER MINUTE VOLUME UNIT CC CUBIC CENTIMETERS L - LITERS CF CUBIC FEET ANALYTICAL DATA UN'T . g - MiCROGRAMS ,nc - M LL.GRAMS EQUIPMENT IDENTIFICATION GLOSSARY ANALYTICAL DATA CONTD. AIR CONCENTRATION IN UNIT PPM - PARTS PER MILLION (BY VOL.l mg. M- MiLLIGRAMS PER CUBIC METER F CC - FIBERS PER CUBIC CENTIMETER MPf CF - MILLION PARTICLES PER CUBIC FOOT METHOD GC GAS CHROMATOGRAPHY |R INFRA RED SPECTROPHOTOMETRY UV . ULTRAVIOLET SP - ViSLIAL SPECTROPHOTOMETRY AA - ATOMIC ABSORPTION SPEC. GV - GRAVIMETRIC ANALYSIS MIC - MICROSCOPY PERSONNEL DATA PROTECTION USED F5 FACE SH'ELD &C - BARRIER CREAM 5 BOOTS RESP - RESPIRATOR PROTECTION GLV.GLOVES CLTH PROTECTIVE CLOTHING GOG-GOGGLES TOBACCO HABITS SMK - SMOKING CHv - CHEWING CALIBRATION DATA DATE METHOD ---------------------------- - --------- ---------- ------------ -- ....... .. - ---------------------------------- -- -- ...------------------------------ ------ PUMP NO. SAMPLING PUMP DATA START STOP --------- ------------------- --------------------- -------------------------------------------------------------- -------------- AVERAGE RATE -- -i Bsck - LCC-CSP-IH-CI 9/75 UCC 024358