. -- (By an OSHR staff correspondent -- A leading researcher on the link between asbestos exposure and lung disease told an American Public Health Association meeting that no avoidable asbestos exposure can be justified.

S--261 OR S-148 FOR IT (MAY CAUSE FOGGING PROBLEMS) E) USE A SMALL PERCENTAGE OF LOWER MOLECULAR WEIGHT POLYSULFIDE POLYMER (MAY HURT PHYSICAL PROPERTIES). 3) TO REDUCE SEPARATION PROBLEM: A) INSTEAD OF LEAD OXIDE, USE MANGANESE DIOXIDE (Mn02) AVAILABLE FROM DIAMOND SHAMROCK (GRADE "D") B) ADD A SMALL AMOUNT OF VERY FINE PARTICLE CARBON BLACK (10-15 MILLIMICRON ' PARTICLE DIAMETER) TO CURING PASTE. 4) ONE COMPONENT SEALING FORMULATIONS ARE NOT RECOMMENDED FOR DOUBLE GLASS WINDOWS.

Cheng's last survey, the situation at CGPC, with respect to exposure to vinyl chloride, mercury, MEK, toluene, benzene, DOP, lead, barium, cadmium, and heat, is unacceptable when compared to U.S. standards.

.-5 ppm July 20 Inci nerator Cl2 Vent Stack KC1 2 ppm 2 ppm In front of maintenance shop Clo .8 ppm HCT 2.0 ppm burning light ends during this time and SO2 ran 1 From piping leading to the ve stack.

.:..r r Lead Industries Association, Inc.

Copies of the procedures for the Old Unit, New Unit, and Dryers will be placed on the table between the Lead Operators' desks in the control room.

I am not a physician, but I would suspec; tiiao ne clxo non sun :er tetra-ethyl-lead poisoninc;, as a result of a careful rGo.urry or your letter of march 9, 1975.

It gives maxima protection against toxic dusts, to the permlsaable limits of lead, plus fibrosis dusts. / Asbestos: We have a similar problem with asbestos, that ls4 when the employee empties the material into the mixer.

The K-car is going to u ventilated rotor and the leading friction material candidates are Cycleweld's 2640B and the Bendix 7163.

Wallen -2- i-iarch 15, 197 6 Since these limitations can lead to significant errors in determining trace levels of PCB's in environmental samples, we suggest that EPA carefully review the validity of the perchlorinaticn technique.

Harrisonburg, Virginia Note: The product-moment correlation of average blood lead levels of white persons ages 6 months-74 years between Caravan Set #1 and Cavavan Set #2 was 0.746 (Test of H0:Rho = 0, p < 0.0001, n = 32)

., per cent by weight Poly(vinyl chloride), per cent by weight Lead, ppm.

EPA's motion to dismiss Hooker's petition for review also seeks dismissal of Tenneco's petition, and EPA's motion states that "the orders underlying [both] petitions for review . . . and .the circumstances leading to the filing of [EPA's] motion to dismiss are essentially identical . . . ." 3.

i A spokesman for a leading con- jservation society last night praised' the Monsanto decision and urged other^ industries to follow suit

Copies of correspondence leading up to the June 1970 change are attached for your added information.