xundxrt* :e Jujwi worker npe-' sure u> lead end toluene, both1 widely used hazardous indus trial auosuneea. and ttb-!

On another tack I want to remind you that the FDA in full recognition of the fact -that the problem of _PCB's is broader than any single agency of government,- recently took the lead in calling together six major Agencies of the Federal Government.

I would like to have you lead Nan Ya into discussing the status of PVC, phthalates and the environment in the Far East.

These results lead to the following conclusion: Personnel bagging, loading,unloading, and debagging Conoco resins in a normal fashion with residual VCM contents less than 1.0 ppmw will not be exposed to VCM above permissable level defined by OSHA.

Despite the lead body solder fiasco, the engineering attitude (with the exception cf Transmission and Axle) remains "wait until the standard is promulgated".

Members of this new association are some of the GARLOCK INC. 00058-009079 ATI-212 Minutes raze -- - leading manufacturers cf as_csic3 products in the U.S.A.

On balance, however, the literature suggests that in utero exposure to VC does not lead to developmental toxicity in experimental animals.

Barber has already determined that the Vinyl Chloride Standard and the events leading up to its promulgation should be re-examined and has advised EDF accordingly.

Barber has already determined that the Vinyl Chloride Standard and the events leading up to its promulgation should be re-examined and has advised EDF accordingly.

Consideration has also been given to contracting for medical research to study how phosgene exposure may lead to pulmonary edema; if this materializes, with funding by the manufacturers concerned, it will be separately presented for approval.

sjc for asbestifonn minerals and have found no detectable amounts, This assurance might be mis leading and give the cosmetic industry the false impression that WC&D talcs are adequately tested for asbestos, I ant also very much concerned about the ract that a firm of this standing in the cosmetic industry does not have facilities to do its own analytical work.

HAMILTON DDS HUNTSVILLE AI Persistence is the key My respect for Chuck Amenta is no secret From close observation I have come to think of him as some kind of genius He developed the American Society for Preventive Dentistry from nothing to a growing movement But when he suggests . the goals we set out to achieve have been reached I am certain he is wrong To effect lasting change we need persistence Many organizations and individuals identify with the preventive philosophy but fail to follow through in practice If they once were enthusiastic most have now fallen back to the easier less demanding repan philosophy of the past Patient persistence works with patients It will work with the profes- sion We need a strong ASPD now to keep up the good start given us by Amenta Brackett and Ross JEROME MIITELMAN DDS NEW YORK CITY Asbestos in dentistry The report by the ADA Councils on Dental Materials and Devices and on Dental Therapeutics regarding Hazards of asbestos in dentistry as very timely and appropriate April JADA We are pleased the Council no longer considers asbestos taining periodontal packs eligible for its Acceptance Program and we further hope that dentists will discontinue use of these packs in private practice Although in 1973 the Food and Drug Administration considered the health hazard from ingestion of asbestos particles inconclusive recent evidence demonstrates neoplastic response in experimental animals following ingestion of asbestos fiber In rats fed talc or chrysotile two gastric leiomyosarcomas were observed while no tumors occurred in the control animals In addition to lung cancers and pleural and peritoneal mesotheliomas indicated in the Council's report numerous epidemiologic studies of defined populations occupationally exposed to airborne asbestos fibers have consistently shown an excessive risk of cancers other than of the lung especially of the gastrointestinal tract review of the literature Schnetderman conctl hatuind cre easd ed ex- posure to airborne asbestos particles leads to an increased risk of digestive system cancer While lung cancers and mesotheliomas are assumed to result from inhalation the exact pro- portion of GIT cancers which would result from direct inhalation of asbes- tos fibers as opposed to indirect m- gestion of sputa contaminated with asbestos fibers is not possible to as- certain For any substance which is known to cause cancer in humans a thresh- old level below which such an agent would not cause cancer has never been demonstrated Thus we urge the Council to go beyond its position of no longer making asbestos taining periodontal packs eligible for its Acceptance Program and take more aggressive steps to educate the dental profession about the carcino- genic propertie's" and potential mu- tagenic hazards associated with asbestos Although the Councils report mentioned that airborne fibers may occur in dental laboratories it did not indicate whether or not environmen- tal monitoring for airborne levels of asbestos fibers ever had been conduct- ed in dental schools during laboratory casting procedures The ADA recently has shown interest in assessing the health hazards associated with waste anesthetic gases and = mer- cury in the dental operatory Leadership and appropriate measures should be taken to assure that dental students instructors and patients are not likewise at an increased health risk resulting from dental laboratory or clinical exposure to asbestos PUTEREPUTERE INFANTE DDS RICHARD A TEMEN MS NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH CINCINNATI CINCINNATI OHIO 1 Federal Register 38 27076 Sept 28 1973 Wagner 1 ( and others Animal exper- iments with tale Fourth Inte national Syme posium on Inhaled Particles and Vapors burgh Scotland 1975.

This number shall thereafter be used by the welder to identify his work/by stamping it alongside each completed weld with steel stencils. 7.9 At the option of the COMPANY'S Lead Equipment Inspector, CONTRACTOR'S welders need not pass the welding qualification tests if they can pre sent suitable and acceptableZevidence of having passed the appropriate ASME Performance Qualification Tests as described in Section IX of the ASME Boiler and Pressure Vessel Code. 8.0 After piping systems are complete, the CONTRACTOR shall blow the lines clean with air, and test where possible!

impact and an inflationary im pact statement before holdinga hearing on tne proposed sun-'- cart In addition to asbestos stan-i dards, the department last' week issued proposed new, standards to limit worker expo-J sure to lead and toluene, both] widely used hazardous indus trial substances, and estab-!

The fact that talc is very frequently found with a signi ficant fibrous content now leads to a very important situation since the total quantities of talc rained in the U.S. exceeds that of asbestos, , < It was pointed out by Cralley(2) that the majority of cos metic talcs contain significant quantities of fibrous particles.