Document evmvNkoNVYjzEqnxVbZrjN59y

lo%. PRI7ATS - P.26L 20th December, 1963. The Centre! Manager, C.3.8. Building Materials Division, STDRST. Dssr sir, tmyf . Toar P.230: lour remarks are noted and wahSHarrai^o for 4 second eet of counts to b taken fro* th* mm Mints after ths completion of the Aaerjet installation. Ths readings quoted range from very low counts up to figures of 1000 pins. This Is an extremely wide range, but the following table my tend to clarify tbs position from the Mints Dspartmant point of view - Acceptable : 0 - 300 particles. It My be ef Interest to note that the average count for the V.A. industry over tbs past two years baa 1961- - 271 particles 1962 - 306 " Cta the question of a *eafe* duet count, this nuat be viewed with e certain amount of caution, since a figure ef 300 partielse at Vlttaaoem in quartslta mtarlal la far acre dangerous than a similar figure eay In Collie. As a general rule, all these associated with the control ef duet and industrial diseaaaa regard a count of 300 as Mtlafaetery. Talking to Dr. MeMulty on ths question of lung dlSMsss esongst our alll and mine employees, his general n iiiienr was that tbs years 1954 - 56 were bad, and that In hie opinion .../2 t 44: The General Manager, SIDNBT. -2 - P.264 20/12/6J there bee been a steady imprereaeat la eueeeedlog years. In this respect we are new awaiting the actual etatlstlee fren the Mines Department. Tours faithfully. Per AUSTRALIAN BLUB ASBESTOS FTT. LTD. c General Superintendent c c t C 4459