Document LgNBQrkJ62QVNEDO8ao9eMJKg

Cyprus Industrial Minerals Company 555 South R ow er S treet Los Angeles, C alifornia 90071 Telephone 213) 439-3700 TWX 910) 321-5753 February 12, 1980 Talc and the OSHA Asbestos Standard 29CFR 1910.1001 Cyprus Industrial Minerals Company's Montana talc based products are free of asbestos as defined by the OSHA Safety and Health Standards (CFR 1910.1001 (a)). Although our California talc based products generally show no asbestos minerals at the lower limits of detecta bility by x-ray diffraction, they may occasionally show trace amounts (0.1% - 0.3%) of tremolite. Our program of continuing checks of airborne dust at our California Cyprus manufacturing plants indicate airborne fiber levels below the allowable TLV. In addition, these fiber checks are monitored by electron microscopy, resulting in a more ac curate and sensitive test. Thus, we feel compliance is assured under the standard outlined in 1910.1001. We attach a list of Montana and California based talcs for your reference and suggest that this letter be kept with previous correspondence on this subject. As new regulatory data is published we will provide further clarification. Sincerely GJ G :rh attach. Vice President Technical Service PLAINTIFFS EXHIBIT CAM-105 CYPRUS MONTANA BASE PRODUCTS ALTALC 200 ALTALC 300 ALTALC 325 ALTALC 400 ALTALC 500 BEAVERWHITE 200 BEAVERWHITE 325 CYPRUFIL 200 CYPRUFIL 325 GLACIER 200 MONOBLEND OLYMPIC . SIERRALITE II STEAWHITE 200 SUPREME USP TALC YELLOWSTONE MISTRON CYPRUBOND MISTRON CYPRUSPERSE MISTRON EG' MISTRON FROST MISTRON FROST COMPACTED MISTRON MONOMIX MISTRON RCS MISTRON RCS #2 MISTRON SPRAY MISTRON STAR MISTRON SUPER FROST MISTRON ULTRAMIX MISTRON VAPOR MISTRON VAPOR COMPACTED MISTRON VAPOR COMPACTED R MISTRON ZSC CALIFORNIA BASE PRODUCTS C-300 C--400 C-500 FURNACE CREEK FURNACE CREEK' COARSE SIERRALITE SIERRA WHITE 200 SIERRA WHITE 325 SIERRA WHITE IR MISTRON 139 MISTRON F-128 MISTRON HGO-75 MISTRON MSC MISTRON T-076 CYPRUS