Document Y995YBkv12zgqJrer7DBkp9vV

v2/- i jw CMI_r.'i';AL U.S.A. l December 6, 1976 LOUISIANA DIVISION PIAQ.JIVMt LOUISIANA 70784 b04 887-4 371 J. N. Wilkes All Employees at LHC 1 NOISE SURVEY 1976 Tsie following are the results obtained in the annual noise survey. The range of levels measured in each area is shown: Area dB Train 1 - Upper deck 89 - 105 Lower deck 81.5 - 98.5 Train II - Upper deck 89.5 - 100 Lower deck 90 - 95.5 Purification - Upper deck 81.5 - 96 Lower deck 83 - 89 Cooperhouse 89 - 97.5 Furnace Area 77.5 - 101 Quench Water Area S3 - 93.5 i Slop Oil L Storage Drum Area 78 - 88.5 In Train I the highest noise levels were around E-113 (the surface condenser) and the coupling on K-20. The situation in Train II was similar with the highest levels recorded around E-5$3 (the surface condenser) and- the coupling on K-520. However, the highest noise level in Train II w,as 5 dB less than the highest in Train I. Purification had high noise levels n,ear the coupling on K-120, This level was 4 dB less than the high.in Train II. The Cooperhouse is probably the noisiest area as a whole. Levels inside the Cooperhouse run in the mid and upper 90's just about every where within the confines of the building. K-71 E 6 F are still the loudest machines. They arc not that much louder than the other U machines and this may he"due to the new exhaust packing on E 6 F. In the 1973 survey, they were quite a bit louder than the other machines. The furnace area is generally "not too had at ground level, The space between the pairs of Solas fu maces is a good bit noisier, The fuel gas letdown station by F-l is the loudest spot in the furnace a tea with a reading of 101 dB. ThAD// AN OPLMATING UNIT Ot 1HI OtIVV CHIMlCAl COMrANI DO 099033 CONFIDENTIAL The quench water- arcj was longest arcund the air conj i ussors in Train II and the steam letdown station in Train I. The letdown station has been improved considerably by covering with lead and insulation. Unfortunately, no readings are available before the Insulation to determine how much quieter it is. The slop oil and storage drum area is the quietest area. This is due to the lack of machinery in this area. The highest level in this area was only 88.5 dB. The table below gives the average time on a daily basis that a person can spend in an area at a given decibel (db) level with no hearing protection. 90 dB or less 96 dB 102 dB 8 hours 209 minutes (average) SO minutes (average) An exposure of 115 dB or greater requires hearing protection for any time period. All employees are urged to wear some form of hearing protection whenever they are in a process area for any length of time. T. M. Gunn /j d i s \ i DO 099034 CONFIDENTIAL