Document zdYyR6wjV0b1dVK9kM2r4R2b6

arjilIM} , ASBESTOS INFORMATION ASSOCIATION -7 1745 Jefferson Davis Highway, Crystal Square 4, Suite 509 Arlington, Virginia 22202 (703) 979-1150 July 2, 1981 MEMORANDUM FOR: Messrs. Beasley, CAPCO^ I Betts, Atlas Turner Dougherty, CertainTeed Reis, J-M Schwarz, Supradur von Dohlen, International Bldg. Zimmerman, National Gypsum Products SUBJECT: Forwarding of Final Draft AIA Publication entitled "Test Report - Tools for Working With Asbestos-Cement Products on Site" ) The enclosed final draft publication entitled "Test Report on Tools for-Working with Asbestos-Cement Products on Site" has been prepared by the Asbetos International Association's Building and Construction Advisory Panel. The publication has been made available to AIA/NA for review and comment prior to it being finalized and made available for use by the asbestos industry. Addressees are requested to review the final draft publication at their earliest convenience and forward any comments to this office. Receipt of your comments by July 15, 198.1 would be appreciated. Thank you in advance for your assistance. jj. j. vigg Executive Director Enclosure (includes minutes of B&CAP meeting of 5/27/81) cc: Messrs. Blakeslee, CertainTeed Jackson. AACPP________ Leineweber, J-M Marsh, R/M (less enclosure) CAP CO JEN 0012684 I TEST REPORT ii TOOLS FOR WORKING j WITH ASBESTOS-CEMENT PRODUCTS ON SITE \ t I FINAL DRAFT - 1st June 1981 CAP CO JEN 0012685 INTRODUCTION The Asbestos International Association has carried our detailed tests identifying methods and tools currently available for wor- kino with A.cl products on site so that dust created is reduced to the minimum reasonably practicable level. The choice of the most appropriate tools for use within each coun trv will depend on custom and practice and national regulations. TESTING PROCEDURE In order to test under the most severe conditions and also to en sure reproducibility, all work on asbestos cement products is carried out in a closed room. For tools normally used in the open air, a low air flow of less than 0,1 m/sec. in the working zone is introduced bv suction. In this way account is taken of the normal dispersal of airbone dust on site in very calm conditions so that the test results obtained are unlikely to be exceeded at any time. Each test is of one hour's duration. Room level (RL) reading is recorded .prior to commencement of test measurement whilst wbrk is being carried out on the asbestos cement products, samples fare taken in the workers breathing zone (BZ) and in the room itself. t- (see "figure below) The AIA Test Room is located at : ASBESTOS INSTITUTE FOR OCCUPATIONAL AND ENVIRONMENTAL SAFETY AND HEALTH Gorlitzer Strasse 1 4040 - NEUSS 1 (Germany) A 4,8 m BZ X working place Height of the room ^ 3,3 m Area f 38 m2 Volume ? 126 m3 V Sampling and evaluation are in accordance with the AIA Reference Method for the determination of airborne asbestos fibre concentra tions at the workplace by light miscroscopy (Membrane Filter Me thod (See AIA Publication "Recommended Technical Method n8 1" RTM.l). The operating time for each tool and product, involved are recorded. CAPCO JEN 0012686 USE OP TEST RESULTS BROCHURE The test report .shall be used as a reference document when informa tion is required on how to work with asbestos cement products. Unde: no circumstances shall the test reports be distributed without ex planation in order to avoid misinterpretation of the results of the test. EXPLANATION OF TEST CONDITIONS AND RESULTS OF MEASUREMENTS Column 1 - MATERIAL Information is given on the material being worked during the test and the working method chosen. Tests were carried out on typical products. For tools which mainly produce coarse dust, the amount of fine dust which is created depends amongst other things, on the density and thickness of the material being worked. Column 2 - CUTTING_CAPACITY Information is given on the volume of work achieved during the one hour test period e.g. metre run of cutting carried out. Column 3--OPERATION_TIME_OF_TOOL j When a 10 per cent figure is quoted this means that during a test of1 hour-Ls duration the tool was operating for 6 minutes. Given the volume of cutting and operation time one can calculate the speed of cutting. e.g. FESTO saw (catalogue reference 3.6) (cutting capacity =18 ra/h (operation time of the tool = 33 % = 20 min/h (speed of cutting = 18 = 0,9 m/min Column 4 - DUST_EXTRACTION_EOyiPMENT Is the tool equipped with dust extraction ? For tests carried out on tools requiring dust extration ecruipment, the WAP-M.l.S is quoted (except for tools delivered complete with vacuum equipment - see Ref. 3.5). When other dust extraction equipment is being considered it should have a performance at least equal to the WAP-M.l.S. CAP CO JEN 0012687 Column 5 - AIR_EXCHANGE_IN_TEST_ROOM If no air exchange is indicated it can be assumed that in actual workint conditions the test figures will not be exceeded even in a closed room. When air exchange is indicated, such tools are normally used in the open air or for intermittent periods indoors. If used in a closed room, test figures could be exceeded. 2yI_C0NCENTRATigN Column 6 (breathing zone BZ) indicates the exposure of the operative. Column 7.(room level RL) indicates the exposure of an assistant or other persons. ! CAP CO JEN 0012688 * Ul ,i_ip<aciorioi ano Environmental Safetya Health A I A - TEST-REPORT No. 0.0 September, 1980 Tool: GRINDER, TYP 1321 Power = 1 600 W Speed a 8 500 r.p.min with silicon carbide blade Source of supply: Bosch GmbH, Max-: D-7022 Leinfelden Test Object ?_Cns!itions_and_Measuring_ResultS Material Cutting Operation Dust Air exchange capacity time of extract, in test room (pieces/h) tool (%) equip. .S .* mitring in stacks 20 cm over lapping 60 5,5 no yes x C.S. = Corrugated sheet Concentration (f/ml) breath, zone rocm level 53 37 CAPCO JEN 0012689