Document gb3w1pEqG6ER48jrGgNDgoDaV

The Asbestosis Research Council PLAINTIFF'S EXHIBIT CAP-1623 Recommended . R,oae For Handlino Asbestos Products o Used in Thermal Insulation' CAPCO KIN 0001560 The Asbcscosis Research Council Truer.: factory rcgulctiotis recognise csbesiosis as an industrial disease which could arise from the inhalation of asbestos dust, end stipulate rules for the pro tection of work people engaged in the manufacture of certain types of asbestos produces. No regulations have yet been introduced relating to the harJUng of asbestos productsfor thermal insulation, although it is accepted the: to elitninete the risk of asbestosis all practical steps should be taken to minimise the inhal ation of asbestos dust. For this reason The Asbestosis Rucarch Council set up a committee of doctors end engineers to consider whet steps should be taken for the protection of workers in this branch of the asbestos industry. As a result of its work, the Committee has recommended 'that the industry should adopt the following code ofpractice. Recommended Code of Pracdce 'Where asbestos products arc used die following procedures should be adopted: (l) W rrever possible preformed material rather than sits mixed material, shjdd be used. (a) Working with loose lagging material should be done in the wet stats wherever practicable, rather than in the dry. Methods o: ranspordng premixed wet compounds -Dai segregated mixing areas sneuid be used wherever possible. (j) When dry mixing is being done respirators should be worn unless a machine with a properly designed ventilation system is available. Portable exhaust venulac'cn systems arc already in use in certain shipyards. This procedure should be extended. (4) Where the casing of material containing asbestos takes place it should be done whenever possible in a segregated area where there is a free circulation of air. If continuous cutting of insulation materials is being carried out a * portable hopper should be used for the collection offall-out waste. Madiir.es arc available for ensuring dust exhaust at a cjtting bench. (5) In the case of spraying asbestos, the practice to be adopted will depend on the type of cauipmme used. The various types arc defined in die Appendix. In all cases the asbestos Sbrc must not be removed from the dust-proofsacks 1 CAPCO KIN 0001561 is. which it is supplied until it is fed into the nischir.es in die prescribed manner. Care should be exercised in handling the sacks in order net to damage them.* (a) The use of effective pre-treatment reduces the concentration of dust to the level obtainable by an cfScicnt exhaust ventilation system. Where pre-treated fibre is used, spraying with any type ofmachine may proceed without limitations save that the operators must, during spraying operadons and for a short period thereafter, wear approved masks. (b) Self-ventilating machines without prc-treatmcit equipment may be used in spaces where the volume of air per spray gun in acdon is not less than 05,000 cu ft provided that operators use approved masks during spraying and for 30 minutes thereafter. Other tradesmen not supplied with masks may not enter the room undl 30 minutes after spraying has ceased. Norma] ver.dladan by open windows is permitted. Where rooms arc below 25,000 cu ft volume per gun mechanical vendlsdon must be provided to give two air changes per hour, and operates must wear approved masks during spraying and for a: least 30 minutes thereafter. Other cades muse not enter whilst spraying is in progress and for one hour thereafter. (c) Non-vcr.dlarcd machines without pre-treatment equipment should only be used in spaces exceeding 50,000 cu ft volume p> . gun; operators and other workers approaching within 50 ft-of the machine and/or the gua ' must wear approved masks during spraying and for 15 minutes after wards. Normal vcadladcm by open windows is permitted. {6) Stripping of Materials Containing Asbestos The area' in which stripping takes place should be classined as a segregate:: location and operatives engaged on such work should wear approved type respirators. (a) Where site locadon permits, protccdvc shccdng {dust sheets/polythene snrouding etc.) should be used to localise or isolate the working area. (b) Wherever conditions permit i.c. on inside work -- power stations, .ships' engine rooms, piping and ducring inside buildings, portable industrial vacuum cleaners should be used during stripping operations and for deming-op purposes in the working area. (c) Where the lagging is receptive to such treatment, weeing prior to and darmg the removal ofthe material should be carried our. (7) Where operations covering mixing, cutring and spraying are carried our and wherever dee can be inhaled, approved respirators should be used and mainratncd as set out below. ** ' 2 1 I CAPCO KIN 0001562 Use md Care of Rcssirsrors Respirators should be worn by all employees at all dma when: (l) Spraying asbestos and feeding hoppers on sprayed asbestos work. Resniratots should be worn by both operator and attendant during the full period that work is being carried out and by any employee remaining in the dnsrv atmosphere for a limited period after, spraying operations have terminated. (a) Carrying out the following operations which, wherever possible, should be . carried our in opai spaces where there is a free circulation ofair: (a) The mixing of any material containing asbestos. (This operation must be carried out in segregated areas if possible.) (b) The mbring of compositions and self-setting cements which. have an asbestos content. (c) The cleaning and emptying of sacks or other containers which contain asbestos or an admixture of asbestos. "Where the above operations axe being carried out ir. couriaec soaccs . adequate arrangements must be made for venedarioa. (j) Carrying out the following operations: .. . (a) The cutting ofall insulation materials containing asbestos or an admixture of asbestos by hand in confined spaces. (b) l ire caning of materials containing asbestos or an admixture of asbestos by portable or other power-driven saws or similar tools. (c) The breaking down for removal of lagging containing asbestos or an admixture of asbestos. The approved respirator should, be carefully maintained and adequate servicing arrangements should be made to ensure that this is done and that employees are not without respirators during maintenance. Medica l Su*pervision of Wor, kers (1) All employees should be examined clinically and raciologically before ` employment or as soon as possible afterwards, certainly within three months, to avoid the employment of men who may be particularly susceptible to the hazard. *t * ` (2) Periodic examinations should be made thereafter, annually ifpossible. '(3) Notts on the Medical Examination of Workers in the Asbestos Industry are available as a guide to doctors concerned. . 3 'T T `APCO KIN 0001563 *1 I (4) New employees should be advised of the precautions necessary in jc industry. (5) A system of recording sh? employment history of workers entering l-.c Thermal Insulation Industry or who have been employed in tha'insulatioa contracting industry would he beneficial. 4 :APCO KIN 0001564 ;' Appendix Definitions (a) Pre-treatment Equipment The pre-treatment equipment and media should he capahle of restricting the amount ofdust in the atmosphere during spaying to a level approximating ~ to that achieved in a modem asbestos textile plant. Pre-treatment should he carried out in a segregated area, the operator wearing as approved mash. The equipment may consist of a dosed roaring drum which throw a measured quantiry of fibre across a finely atomised water spray which is projected along the axis of the drum. The action, which is improved hy the addition of a wetting agent to the water, tikes place over a period of ttrr.c sufficient to produce a uniform dampening of the asbestos fibres to which the finer particles of asbestos adhere, even when passed through fits soray machine and ejected from the gun. Spraying is carried out immediately after the dampening cydc is completed. (b) Self-ventilating Machine One in which the fan providing the air stream in which the fibre'is conveyed through the hose to the gun draws in air supply via a path from the fibre hopper charging aperture, the charging of the hopper being carried' out only whilst the spray machine fiaa is operating. (c) Non-vcndlatcd Machine . . A machine in which the air stream for conveying the fibre is induced from a source outside the machine and which provides no air movement away from the operator's face when the machine is being charged with fibre. December Xp65 The Asbestosis Research Council Secretary Dr S. Holmes P.O. Box No 40 Rochdale, Lancashire Tdephone: Rochdale 4742a ' \* 5 !* * CAPCO KIN 0001565