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TOM FLORES OPERATIONS March 2, 1973 DR. V. H. ions -k. . C" A A ^2/} n/5 / At o' IUR Mr. A. A. Ranblkur - Bldg. R-141 ' Hrr^SXlCIatt - 'BIdg.^141 Mr. T. B. Bonney -- Pittsburgh RE: ASBESTOS DUST TESTS Five tests were run during February for asbestos fibers. Results are shown below. AREA ACT!VITT TIME Min. CONCENTRATIONS Fibers/ml Room 30 Laying asbestos rope bead on Up of molten mstwl crucible 2.8 0 Bldg. 54E Dumping potlining from pot (wet pot) Ground level 17.1 Craneman's level 15.38 .068 .187 Bldg. 54E Cutting Shamol N-4 Insulation block daring cutting operation 44 2.51 during clean-up 7 1.8 TOM FLORES , T7:djw ApC 002982 TOM FLORES DR. V. H. BARBOUtt^ BLDG. I MR. C. L. GREgHf'- BLDG. I MR. H. P^AlftCniTRODT - BLDG. I MR. R^; McCORMACK - BLDG. I MR^tf. F. SCOTT - BLDG. I V. n.-ftARBOW' - BLJJU. i - PIEe Mr. A. A. Rambikur - Bldg. R-141 RE: ASBESTOS DUST TEST AT BLDG. 54E A dusC test was taken on December 4, 1972 at Bldg. 54E while John Manville Brand Superex Block Insulation was being cut. The employee was wearing the sampler while cutting the Hi-Temp block. Sampling period was 48.5 minutes. Some of the dust was visible on the filter so two slides were prepared, one as is, and the other one with the surface dust knocked off. The results are shown below. SAMPLE TIME COUNT CONCENTRATION As is 48.5 min. first second 3.53 fibers/ml 3.31 Dust knocked off 48.5 min. first second 4.74 flbers/ml 4.66 Fibers are difficult to count when there is.a lot of material on the slide. TOM FLORES APC 002983 TOM FLORES OPERATIONS 'lay 3, 1973 1 1 I DR. V. II. BARBOOR MR. C. L. GREEJ* MR. H. P. jUtfONTROUT MR. R. C. McCORMACX MR. C. F. SCOTT DfL- V. ft.' BARBOUR ~ eei^-^-Mr. A. A. Ramblkur - Bldg tier- ftr-fti. Podhora -- Bid*; R-441 Mr. T. B. Bonney - Pittsburgh RE: ASBESTOS AIR SAMPLES The following tests were run during April for asbestos fibers. DATE ACTIVITY TIME Minutes WEARING RESPIRATOR FIBERS/ML 4-13-73 Cutting marinlte to fit casting troughs 31.5 Yes 2.77 2nd count same slide 3 m above 1st sample 5.22 3rd count same slide 3 mm below 1st sample 3.72 Drilling holes In marinlte 18 Yes 3.88 2nd count same slide 2 m below 1st sample 18 Yes 3.25 Insulating bottom of pot with Skaaol N-4 Hl-temp block 20 No 1.97 2nd reading of above sample 3 am above on same slide 20 No 1.3 Insulating pot with Skamol 2nd employee 16.75 No 1.9 Dumping pot 54E 14.5 Yes .047 4-24-73 Tapping one pour behind asbestos cloth shield 11.25 Yes .097 Brushing off rim of crucible 1.25 Yes 0 4-30-73 Dumping brick out of No. 6 kiln 18.25 Yes 0.5 TOM FLORES TF:djw APC 002984 TQM FLORES OPERATIONS Jlarch 2, 1973 DR. V. H. JkHCSOUR /)/*>&! A IS^ Oe^OSIQtfS ce*- -^>,Mr. A. A. Rambikur - Bldg. R-141 r Mrs-*. S. Clark - Bldg. TP 141 Mr. T. B. Bonney -- Pittsburgh RE: ASBESTOS DUST TESTS Five tests were run during February for asbestos fibers. Results are shown below. AREA ACTIVITY TIME Min. Roon 30 Laying asbestos rope bead on lip of molten metal crucible 2.8 Bldg. 54E Dumping potlining from pot (wet pot) Ground level 17.1 Craneman18 level 15|.38 Bldg. 54E Cutting Shamol N--4 Insulation block during cutting operation 44 CONCENTRATIONS Fibers/ml 0 .068 .187 2.51 during clean-up 7 1.8 TOM FLORES TFrdjv ARC 003002 *i TOM FLORES DR. V. H. BAJUBOUfr'^BLDG. I c.mr. l. GREjar"- bldg: I MR. H. P..ARMTNTROUT - BLDG. I MR. Ry^rT McCORMACK - BLDG. I MR^f. F. SCOTT - BLDG. I Dir.' V. U. BARBOOP - BLiA,. 1 - PID ...--Mr. A. A. Ramblkur - Bldg. R-141 RE: ASBESTOS DUST TEST AT BLDG. 54E A dust test was taken on December 4, 1972 at Bldg. 54E while John Manvllle Brand Superex Block insulation was being cnt. The employee was wearing the sampler while cutting the Hi-Temp block. Sampling period was 48.5 minutes. Some of the dust was visible on the filter so two slides were prepared, one as is, and the other one with the surface dust knocked off. The results are shown below. SAMPLE TIME COUNT CONCENTRATION As is 48.5 min. first second 3.53 fibers/ml 3.31 Dust knocked off 48.5 min. first second 4.74 fibers/ml 4.66 Fibers are difficult to count when there is a lot of material on the slide. TOM FLORES APC 003003 TOM FLORES OPERATIONS 'lay 3, 1973 DR. V. H. BARBOUR MR. C. L. GREE* MR. H. P. ^*MINTROUT MR. R. C. McCORMACK MR. C. F. SCOTT DR. V. ft. BARBOUR RE: ASBESTOS AIR SAMPLES ec:t:>^lr. A. A. Rambikur - Bldg. R-141 !kr #r; Podhtrra - R--141 Mr. T. 3. Bonney - Pittsburgh The following tests were run during April for asbestos fibers. DATE ACTIVITY TIME Minutes WEARING RESPIRATOR FIBERS/ML 4-13-73 Cutting marlnite to fit casting troughs 31.5 Yes 2.77 2nd count same slide 3 mo above 1st sample 5.22 3rd count same slide 3 mm below 1st sample 3.72 Drilling holes in marlnite IS Yes 3.88 2nd count same slide 2 mm below 1st sample 18 Yes 3.25 4-24-73 4-30-73 Insulating bottom of pot with Skamol M-4 Hi-temp block 20 2nd reading of above sample 3 ran above on same slide 20 Insulating pot with Skamol 2nd employee 16.75 Dumping pot 34E 14.5 Tapping one pour behind asbestos cloth shield 11.25 Brushing off rim of crucible 1.25 Dumping brick out of No. 6 kiln 18.25 No No No Yes Yes Yes Yes 1.97 1.3 1.9 .047 .097 0 0.5 TOM FLORES TF:djw APC 003004 F X/\N1 F'L-F' Cooe SVSTHTM F0 IDfMT/FVIN6 ASe>eS7T?S. ^ MOW-ASCKTOS /Kj^UL/\-r/OM APC 003005 date! P&OCJ Z4~ SF-4Q67 ALUMINUM COMPANY OF AMERICA e.E.'FftDHcefi-- ENGINEERING DEPARTMENT JNP Hvfr. pgw: