Prepared by ten leading experts from the National Cancer Institute, the National Institute of Environmental Health Sciences, the Na tional Institute for Occupational Safety and Health (N.I.O.S.H.), and the International Agency for Re search on Cancer, the report conservatively esti mates (with documented exposure and epidemiolog ical evidence) that up to 38 per cent of total cancer mortality over the next three decades will be as sociated with asbestos and five other "highexposure" carcinogens (arsenic, benzene, chromium, nickel oxides, and petroleum fractions).

EDUCATION, AND WELFARE Public Health Service Center for Disease Control National Institute for Occupational Safety and Health 1974 NGC 03425 TABLE OE CONTENTS P & C:AM No. 101 102 103 105 (06 107 108 109 1 10 112 114 1 16 117 118 121 123 125 126 127 1 39 140 141 142 146 151 152 153 1 55 158 159 160 163 165 Paces 16 1-9 1-5 1-5 1 -7 1-6 1-12 1-7 1-6 1-5 1-5 1-6 1-6 1-6 1-6 1-8 1-9 1-13 Ml 1-8 1-7 . 1-8 1-7 1-7 1-5 1-5 1-6 15 1-9 1-5 1-10 1-7 1-7 Tide Lead in Blood and Urine Lead in Blood and Urine Mercury in Urine Mercury in Blood Colorimetric Method for Free Silica Antimony in Urine Nitrogen Dioxide in Air Free Silica (Quartz, Cristobalite, Tridyrnite) in Atmospheric Dust Quartz in Coal Dust by Infrared Spectroscopy Carbon Monoxide in Air Fluoride in Urine Cyanide in Air Fluoride and Hydrogen Fluoride in Air Acrolein in Air Beryllium in Air Beryllium in Air Formaldehyde in Air Hydrogen Sulfide in Air Organic Solvents in Air Arsenic in Urine and Air Arsenic in Urine and Air 2,4-Toluenediisocyarate (TDI) in Air p.p-Dipbenylmethanediisocyanale (MDI) in Air Sulfur Dioxide in Air Cadmium in Air Total Particulate Chromium in Air Ozone in Air Lead in Air Parathion in Air Oil Mist in Air Sulfur Dioxide in Air Sulfur Dioxide in Air Mercury in Urine v NGC 03426 TABLE OF CONTENTS (Continued) P & CAM No.

:OA1.QO. tsr AMERICAN CYANAKID COMPANY MAC GREGOR LEAD PLANT Cily. village. or other place CHICAGO ' Siaie IL JZIP code !'"

:OA1.QO. tsr AMERICAN CYANAKID COMPANY MAC GREGOR LEAD PLANT Cily. village. or other place CHICAGO ' Siaie IL JZIP code !'"

The boiler lead lines are of varying sizes consistent with their design load capacities.

Not until after World War II did we really become aware of We have accumulating evidence that mercury, lead, and the health dangers, both immediate and long term, of many cadmium in the environment can attack the central nervous of the substances we produce, use. and often release into system.

Make certain that employees routinely assigned to jobs involving the handling of leaded chemicals continue to receive semi-annual lead blood and urine examinations. 6.

On the other hand, symmetrical attachment of the chlorines to both carbons of the double bond leads to a more uniform electron delocalization, as illus trated by the four resonance forms of perchloroethylene (PER), resulting in a more stable molecule.

FILE NAME Newspaper & Magazine Articles NMA DATE 1975 Mar 20 DOC NMA016 DOCUMENT DESCRIPTION The Montreal Star - Asbestos Clinic Let Sick Men Work inc AR, ee A oe oo ye IE ET A Bg ere Seen aD nas a ree ST ENT Ee Speavn BE pining .

Some of these workers had engaged in lead smelting but were included in this cohort.

.`` M estimates about 45,000 tons Less than half of 12,o0 r 10 2,00 00 tons is estimated wear away Amy Throughout Throughout the paper they use a safety factor of 10 to make only . sure they are stating maximum quantities For instance they found that 0.0023 percent of the lining wear was released as asbestos fibers but state this figure as less than 0.02 percent Likewise the concentration of asbestos fibers in the atmosphere from brake usage was calculated as 0.007 x s 10-9 10-9 gms per cu moter but was reported as 10 times that or : 0.07 x 10-9 gms per cu meter iiY Some of the pertinent data are given in the act aru e aa ctul al values without multiplying ' 10 as they did in the paper following table by the factor of Background in asbestos ambient test air Asbfe ibes r frt om bo rakes in exhaust air Total asbestos fiber in exhaust air asbestos Estimated brake in urban air Asbestos fiber from brake in airborn wear Qust Asbestos fiber released from lining wear 1.9 ^ 1.3 x 3.2 ^ 0.007 10-9 m 10-190-109-9 m x 10-9 mm3 m3 0.005 percent 0.0023 percent ' Extrapolated :from data on residence times for lead particles y : 15 ; Amy | nice 2 Asbestos Emissions from Brake Dynamometer Tests \* ns a Local Detro^flt atmospheric concentration ranges from 0.5 to . 13.1 x 10-9 gms per cu meter so the calculated value of 0.007 ^ 10-9 gms per cy meter is only of normal conditions accruing from all natural weathering of asbestos farming excavating This leads to a minor fraction sources including rock and soil mining their final conclusion Based on this upper bound the use of brakes was judged to be not significant as a source of atmospheric asbestos . ' CC ) oo 4 J.

1-2 INTERNAL CORRESPONDENCE METALS DIVISION To(N4meiMr.

This leads to their final conclusion "Based on this up_ _per bound, the use of brakes was judged to be not significant ns a source of atmospheric asbestos".

It would be grand if the manufacturers and users of asbestos, silica, vinyl chloride, lead, nickel and a whole host of other toxic substances had adequately warned workers and others exposed to their effects.

Lead crosses the placenta.