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PLAINTIFF'S EXHIBIT Work Environment CBY 3102515 C 000174 LAM022084 Substance SILICA, S1O2 DUSTS TLV Crystalline {Quartz 114808-60-7] TLV in mppcf *1 300" % quartz +10 TLV for respirable dust in mg/m3: 10 mg/m31'________ % Respirable quartz + 2 TLV for "total dust," respirable and nonrespirable: 30 mg/m3 % quartz + 3 {Cristobalite..........

Wflfr Ba/kamp 244-THERMOSTATIC HEATER CONTROL VALVES (Cont.)"".... ......................

'.7' ,-r.ccs--t ^BOU^^AKE|!

North American Refractories Co.

PLAINTIFF'S EXHIBIT NAR-181 opr>j /Ajj x1 ^9 C.

J*l7 3, 1947 ' Hot 0.3. 53719 Eoary Scores Radical Deperteant Industrial Ooaoission of Chio Colaabu*, Chio Gentleman On Jan* 30 th* writer visited th* plant of th* Ironton Fir* ?

Monsanto a* S4U4 .xif 3*) "IM LAW DEPARTMENT S.

14256997033 2002-02-26 19:09:21 (GMT), page 5 4 elsewhere have promulgated several different ABC theories and some have gained widespread acceptance ami influence within the scientific community.

14256997033 2002-02-26 19:09:21 (GMT), page 18 17 demonstrate why they are wrong, we will briefly describe the mining process and the route tremolite travels to get into the final product.

14256997033 2002-02-26 19:09:21 (GMT), page 27 26 readily conceded that counting only fibers longer than 5 um enumerates just a fraction of the total number of fibers present, there is incomplete awareness that the fraction counted is highly variable, depending upon the fiber type, the process or products used, and even die past history ofthe asbestos material (e.g., old versus new insulation material), among otter factors.

14256997033 2002-02-26 19:09:21 (GMT), page 48 47 Another Dose Correction In the 1980 paper McDonald justified the age 45 cut off because "by this time most of the men had completed their service" but this was not true.

m 56 Annals New York Academy of Sciences \Xvv.