Document X0E864xVRjaMwgJZMzn3yrGB

Textile Services Division 1415 PARK AVENUE HOBOKEN, NEW JERSEY 07030 201-792-2400 REPORT OF TEST CLIENT: Eaton-Dikeman Div. of Knowlton Bros. Mt. Holly Springs, Pennsylvania 17065 December 14, 1972 NUMBER 78992 SUBJECT: Duplicate specimens of three (3) samples of filter paper sampled and identified by Client as listed below, several grams of asbestos and Anthraquinone Blue 3G dyestuff. Client's letter of authorization dated December 4, 1972. Procedure : Removal of Asbestos Fibers from Aqueous Suspension by Cellulose Filter Paper Three (3) grams of asbestos fibers were added to 900 milliliters of distilled water in a blender and agitated for one minute. Three (3) grams of Anthraquinone blue 3G dye were dissolved in 600 milliliters distilled water and filtered through a 0.8 micron cellulosic membrane filter at medium speed to remove any undissolved dye. The asbestos slurry was added to the filtered dye solution and mixed briefly. The dyed asbestos slurry was filtered through a membrane fflter 0.45 microns, and washed until the filtrate was colorless. The dyed asbestos fibers were dispersed in 3 liters of distilled water and screened through a fine stainless steel screen (openings about 125 microns). During the screening process, as the longer fibers were collected on the screen they were occasionally discarded. This procedure provided some milligrams of dyed, short asbestos fiber pieces in 3 liters of distilled water. To demonstrate that these dyed asbestos fibers are observable, 50 milliliters of the fiber suspension were filtered through a white cellulose membrane (0.45 microns) filter. The membrane was dryed for 15 minutes at 105C. A convenient size section from the membrane was cut and placed on a microscope slide, saturated with immersion oil (Nr 1.515) to render it transparent and covered immediately with a slide coverglass. The slide was examined under a microscope provided with a lOx eye piece, a square measuring/counting reticle and 43x objective lens. Counting procedure used was similar to that specified by OSHA for Asbestos contamination. Page 1 of 2 SIGNED FOR THE COMPANY BY Laboratories in: New York Chicago Los Angeles Omaha Tulsa Memphis Reading Hanford cds O UR L E T T E R * AND R EP O R TS ARC FO R T H E E X C L U S IV E U S E O P T H E C LIE N T TO WHOM T H EY A R E A D D R ESSED , AND TH EIR COM M UNICATION TO AN Y O T H ER S OR TH E U S E OP T H E NAM E OP U N ITED ST A T ES T EST IN G COM PAN Y, IN C., M UST R E C E IV E O UR PRIO R W RITTEN A P PR O V A L. O UR L E T T E R S AND R EP O R TS A P P LY O N LY TO TH E SA M PLE TESTED AND ARE NOT N EC ES SA R ILY INDICATIVE OP TH E Q U A LITIES O F APPAREN TLY ID EN TICA L OR SIM ILAR PROD UCTS. SA M PLES NOT O ESTROYCO IN T E S T IN G A R E R E T A IN E D A M AXIM UM O F T H IR T Y D A Y S . T H E R EP O R T S A NO L E T T E R S AND TH E NAM E O F T H E U N ITED ST A TES TEST IN G CO M PAN Y. IN C , OR IT S S E A L S O R IN S IG N IA , A R E N O T TO B E U S E D U N D ER A N Y C IR C U M S T A N C E S IN A D V E R T IS IN G TO T H E G E N E R A L P U B L IC . CLIENT: Eaton-Dikeman United States Testing Company, Inc. Number 78992 For the actual test filtration, 500 milliliters of the fiber suspension were passed through each one of the filters provided. Blue asbestos was very evident on the surface of each one of the filters. Next the filtrate was then passed through a white membrane filter (0.45u) and dyed, transparent!zed and viewed under the microscope as above. Results : Sample/Specimen: Reticle Areas Examined: 909-22/A 909-22/B 20 20 915/A 915/B 20 s 20 955/A 20 955/B 20 Demonstration 8 Asbestos Particles Counted: Under 5 microns Over 5 microns Total 65 18 83 74 282 213 29 21 17 63 58 3 5 91 345 271 32 26 113 106 219 Calculated Asbestos Particles Present on Total Membrane Filter: Under 5 Microns 96298 109631 417783 315560 Over 5 Microns 26667 25186 93335 85927 Total 122965 134817 511118 401487 42963 4445 47408 31111 7408 38519 418845* 392900* 811745* Effectiveness of Filter, % (Total Calculated Particles on Each Membrane, Filter Compared with Total calculated Particles on Demonstration Membrane Filter`dX10*) 98.5 98.3 93.7 95.1 99.4 99.5 --- *To compare with the other results these figures were multiplied by ten as the volume of suspension tested was only 50 ml, while all other tests are based on 500 ml of suspension. Conclusion: The above results indicate that filter paper 955 is the most effective collector of asbestos particles in aqueous suspension of the filters tested. c/ A . * * 10 & 166 Page 2 3 L l V s l * 2 .0 '' H 7 0 Textile Services Division 1415 PAHK AVCNUC HOBOKCN, NEW J E I S f Y 07030 201-792-2400 REPORT OF TEST CLIENT: Eaton -Dikeman Div. of Knowlton Bros. Mt. Holly Springs, Pennsylvania 17065 January 3, 1973 NUMBER 80060 SUBJECT: Duplicate specimens of two (2) samples of filter paper sampled and identified by Client as listed below, several grams of asbestos and Apthraquinone Blue 3G dyestuff. Client's letter of authorization dated December 20, 1972. Removal of Asbestos Fibers from Aqueous Suspension by Cellulose Filter Paper Procedure : Two (2) grams of asbestos fibers were added to 600 milliliters of distilled water in a blender and agitated for one minute. Two (2) grams of Anthraquinone blue 3G dye were dissolved in 400 milliliters distilled water and filtered through a 0.8 micron cellulosic membrane filter at medium speed to remove any undissolved dye. The asbestos slurry was added to the filtered dye solution and mixed briefly. The dyed asbestos slurry was filtered through a membrane filter 0.45 microns, and washed until the filtrate was colorless. Pago 1 of The dyed asbestos fibers were dispersed in 2 liters of distilled water and screened through a fine stainless steel screen (openings about 125 microns). During the screening process, as the longer fibers were collected on the screen they were occasionally discarded. This procedure provided some milligrams of dyed, short asbestos fiber pieces in 2 liters of distilled water. To demonstrate that these dyed asbestos fibers are observable, 50 milliliters of the fiber suspension were filtered through a white cellulose membrane (0.45 microns) filter. The membrane was dryed for 15 minutes at 105C. A convenient size section from the membrane was cut and placed on a microscope slide, saturated with immersion oil (Nr. 1.515) to render it transparent and covered immediately with a slide coverglass. The slide was examined under a microscope provided with a lOx eye piece, a square measuring/ counting reticle and 43x objective lens. Counting procedure used was similar to that specified by OSHA for Asbestos contamination. SIGNED FOR THE COMPANY BY , - , ' ,< / v ' l R. Robi sou Laboratories in: New York Chicago Los Angeles O m aha lu lsa M emphis Reading Hanford cds OUR L E T T E R S AND R EP O R TS ARE FO R TH E E X C L U S IV E U S E O F T K E C LIE N T TO WHOM T H EY A R E A D D R ESSED , AND T H EIR COM M UNICATION TO ANY O TH ER S OR TH E U S E O F TH E NAM E O F U N ITED STA TES TEST IN G COM PANY, INC , MUST R E C E IV E O UR PRIO R W RITTEN A PPR O V A L OUR LE T T E R S AND REPO RTS A P P LY O N LY TO T H E SA M P L E T E S T E D AND A R E NOT N E C E S S A R IL Y IN D IC A T IV E O F T H E Q U A L IT IE S O F A P P A R E N T L Y ID E N T IC A L OR SIM ILA R PR O O U C T S S A M P L E S N OT D E S T R O Y E D I N T E S T I N G A R T M E T A I N F O A M A X I M <M O F T H I R T Y D A Y S T H E R E P O R T S A N D L E T T E R S A N D T H E N A M E ' O F T H E U N I T E D S T A T E S T E S T I N G C O M P A N Y . IN C .O F ! its, < A L U O R IN S IG N IA , A f N O T T O 8 F U S E D U N D E R AN> C !R C U M 0 A N C E A IN A O V t.R T iS IN O i n T H E G E N E R A L . P U R L I C 11 fr r i p f T't 1 >t CLIENT: Eaton-Dikeman United States Testing Company, Inc. Number ge>e>'o For the actual test filtration, 250 milliliters of the fiber suspension were passed through each one of the filters provided. Blue asbestos was very evident on the surface of each one of the filters. Next the filtrate was then passed through a white membrane filter (0.45u) and dried, transparentized and viewed under the microscope as above. Results : Sample/Specimen: Reticle Areas Examined: 610/A 20 610/B 20 1342/A 20 1342/B 20 Demonstration 8 Asbestos Particles Counted; Under 5 microns 000 Over 5 microns 000 Total 0 00 0 0 0 Calculated Asbestos Particles Present on Total Membrane Filter : Under 5 Microns 000 0 Over 5 Microns 000 0 Total 0* 0* 0* 0* 162 120 282 600,469 444,792 1,045,261 Effectiveness of Filter, % (Total Calculated Particles on Each Membrane, Filter Compared with Total calculated particles on Demonstration Membrane Filter x5**). 100.0 100.0 100.0 100.0 ---- *Scanning of the entire filter after observation of the number of reticle areas required by OSHA revealed that each filter had one or two large asbestos fibers. It is our opinion that these are laboratory contamination. **To compare with the other results these figures were multiplied by five as the volume of suspension tested was only 50 ml, while all other tests are based on 250 ml. of suspension. Conclusion: The above results indicate that either filter paper is a very effective collector of asbestos particles in aqueous suspension. However, paper 1342 had a much higher flow rate under vacuum conditions. f Is h: Page 2 r . K>