Document 39doY4RG2L1dqDowDXjD2yvx

CONCLUSION AND RECOMMENDATION FIFTY TWO (52) PERSONNEL SAMFLES FOR POTENTIAL ASBESTOS EXPOSURE WERE COLLECTED DURING THE FIRST HALF OF 1936. THE HIGHEST POTEN TIAL EXPOSURE OCCURRED DURING HAND BRUSHING OF COPPER CATHODES. THE PROCEDURE WAS MODIFIED TO ELIMINATE DRY BRUSHING. THIS RES ULTED IN POTENTIAL EXFOSUREES BEING REDUCED TO LESS THAN 0.01 0.02 FIBERS/CC. ONE INDIVIDUAL WAS FOUND TO CONSISTENTLY HAVE THE HIGHEST POTENTIAL ASBESTOS EXPOSURE DURING PULP MIXING. THE PROPER PROCEDURES FQR THIS JOB WERE REVIEWED WITH THIS PERSON WITH AN EMPHASIS ON PROPER WET TING TECHNIQUE. IT IS RECOMMENDED THAT THE PROPER PROCEDURE FOR MIXING PULP BE REVIEWED SEVERAL TIMES PER YEAR WITH THE PEOPLE PERFORMING THIS JOB. ONE HUNDRED AND FOUR (104) PERSONNEL SAMPLES WERE COLLECTED DURING THE "INITIAL MONITORING" REQUIRED BY THE REVISED ASBESTOS STANDARD. THREE SAMFLES WERE ABOVE THE ACTION LEVEL BUT NONE WERE ABOVE THE PERMISSIBLE EXFOSURE LIMIT. TWO SAMPLES WERE FURTHER ANALYZED BY SCANNING ELECTRON MICROSCOPY. ONE SAMPLE CONTAINED INORGANIC AND ORGANIC "FIBERS" AND THE OTHER CONTAINED CELLULOSE FIBERS. NEITHER CONTAINED ANY ASBESTOS FIBERS. IN THE FUTURE WHEN ANY RESULTS ARE ABOVE THE ACTION LEVEL OR PERMISSIBLE EXPOSURE LIMIT, CONSIDERATION SHOULD BE GIVEN TO HAVING AN SEM ANALYSIS PERFORMED TO DETERMINE WHETHER OR NOT THE "FIBERS" ARE ASBESTOS. EFFORT SHOULD CONTINUE TOWARD THE USE OF ENGINEERING CONTROLS OR PROCEDURE MODIFICATIONS TO FURTHER ELIMINATE POTENTIAL EXPOSURES TO ASBESTOS. AREA NOISE MONITORING DATA INDICATED THERE WERE NO CHANGES IN -THE NOISE LEVELS IN THE CELL SERVICE BLOCK. ALL HIGH NOISE LEVEL AREAS ARE PROFERLY FOSTED WITH THE REQUIRED WARNING SIGNS. THE PROCEDURE USED FOR MIXING THE DERAKANE SOLUTION AND VARIOUS ADDITIVES WAS REVIEWED AND IT WAS JUDGED THAT NO EXFOSURE SAMPLING WAS REQUIRED'. ONLY SMALL AMOUNTS OF THE CHEMICALS ARE USED AND ONLY ON ATT INFREQUENT BASIS. THE MIXING IS CARRIED OUT IN A VENTILATED ENCLOSURE. EDUCATION ON THE HAZARDS OF THE CHEMICALS AND USE. OF DONE ON A ROUTINE EASI3. DO 106987 CONFIDENTIAL SAMPLING PLANS FOR 1987 ALL JOBS IN THE CELL SERVICE BLOCK WILL BE SAMPLED AT LEAST ONE TIME DURING THE YEAR FOR ASBESTOS EXPOSURE. JOES THAT HAVE THE HIGHEST POTENTIAL EXPOSURE WILL BE SAMPLED SEMI-ANNUALLY. THESE JOBS INCLUDE MIXING PULP HOOKING UP CATHODES AND DUMPING ASBESTOS CLEANING COPPER CATHODES DRAWING CATHODES OPEATING CATHODE WASHER AMD RECOVERY SYSTEM CLEANING ANODES JANITORIAL OPERATIONS ES INVOLVING WORK IN HIGH NOISE AREAS WILL BE MONITORED USING ERSONUEL AUDIODOSIMETERS. CCoanL^?ID0b6n98t8ial TJ e_, GOALS FOR 1987 INSTALL"!ON OF HEPA VACUUM STATIONS AND BOOT RASHERS TO UPGRADE DECONTAMINATION FACILITIES. UPGRADE ASBESTOS DEBAGGING EQUIPMENT: WORK IS UNDERWAY TO MODERNISE THE EELTYNE DE3AGGER SO IT WILL OPERATE WITHOUT OPERATOR ASSISTANCE. REDUCE POTENTIAL ASBESTOS EXPOSURE DURING PULP MIXING OPERATION: INVESTIGATE USE OF AN AUTOMATIC DEBAGGER TO OPEN ASBESTOS BAGS FOR THIS OPERATION. CONSIDER USE OF A CLOSED AGITATED VESSEL TO MIX ASBESTOS PUL? SLURRY. INSTALL A SCREW CONVEYOR SYSTEM TO REMOVE ACCUMULATED ASBESTOS OUT OF THE CATHODE WASHER SUMP. DO 106989 CONFIDENTIAL INDUSTRIAL HYGIENE SURVEY, 1986 ASBESTOS EXPOSURE EVALUATION THE OSHA PERMXSSA3LE EXPOSURE LIMIT FOR ASEESTOS IS 0.2 FIBERS/CC (GREATER THAN 5 MICRONS IN LENGTH) AS AN EIGHT HOUR TIME WEIGHTED AVERAGE. THE ACTION LEVEL IS 0.1 FIBERS/CC. ASBESTOS SAMPLES WERE COLLECTED USING A 25 MM DIAMETER MIXED CELLULOSE' ESTER MEMBRANE FILTER IN AN OFEN FACED CASSETTE WITH A 50 MM EXTENSION COWL. AN AIR FLOW RATE OF APPROXIMATELY 2.0 LITERS PER MINUTE IS___ OBTAINED USING A GILIAN MODEL HFS113A OR DUPONT MODEL P 2500 BATTERY FQWERED PUMP. THE SAMPLES ARE ANALYSED AT AN AIHA ACCREDITED LABORATORY. SAMPLING PUMPS ARE CALIBIRATED BEFORE AND AFTER EACH SAMPLE IS COL LECTED. THIS IS THE NIOSH 740OA METHOD AS DESCRIBED IN APPENDIX A Or THE REVISED ASBESTOS STANDARD, 29CFR 1926.58. THE RESULTS OF THE ASEESTOS MONITORING ARE FOUND IN ATTACHMENT 1 AT THE END OF THIS REPORT. ONE HUNDRED FIFTY SIX (156) PERSONNEL SAMPLES AND T-:iRTY SEVEN (37) AREA SAMPLES WERE COLLECTED. NO PERSONNEL OR AREA SAMFLES COLLECTED AFTER THE REVISED ASBESTOS STANDARD TOOK EFFECT WERE FOUND' TO BE ABOVE THE PERMISSIBLE EXPOSURE LIMIT. AS A RESULT THERE ARE NO "REGULATED AREAS" IN THE CELL SERVICE BLOCK. THE ASBESTOS STORAGE ROOM, WHICH INCLUDES THE PUL? MIXING OPERATION, WILL CONTINUE TO EE A RESTRICTED ACCESS AREA REQUIRING FILL PROTECTIVE EQUIPMENT FOR ANYONE ENTERING. THE ASBESTOS STORAGE AREA IN THE CHLORINE PLANT WAREHOUSE WHICH IS CONTROLLED' BY CELL SERVICE PERSONNEL WILL ALSO BE A RESTRICTED DO 106990 CONFIDENTIAL NOISE EXPOSURE EVALUATION AM AREA NOISE SURVEY WAS CONDUCTED USING A B&K MODEL 2205 HAND HELD SOUND LEVEL METER. IT WAS CALIBRATED USING A B&K TYPE 4230 AUDIO CALIBIRATOR WHICH EMITS A 94 DB SOUND AT 1000 HZ. ALL MEASUREMENTS WERE TAKEN USING THE A-WEIGHTED SCALE IN THE SLOW RESPONSE MODE. THE RESULTS OF THE SURVEY ARE SHOWN ON THE BLOCK DIAGRAM IN ATTACH MENT 2 AT THE END OF THIS REPORT. DO 106991 CONFIDENTIAL