Document om4gjnr4j0K7qm520XQ0qXnrE

L. Y. Thatcher October 31, 1967 **e.3 and has been applied successfully on Chambers Works. A further requirement for an effective monitoring program will include the employment of fully qualified(pref<rrablp certified) Industrial Hygienists to directly conduct collecticn of th~ samples and to carry cut the dust counting, the documentation of field nvtec and analytical results end the preparation of reports Also should be the responsibility of the Industrial Itygleniit. Equipment Specifications. A. Station Sampling - Portable (Ref. "Air Survey" Memorandum of October 21, 1966). 1. the "Freon-12" powered "Ohlco Constant State tibWet Air Sampler" or the "Chico Automatic Chi-Jet Air Sampler" fitted with an improved standard midget lmpinger ("Unico 2000") in series with an 0.6 micron pore alse "millpore" filter (Cat. lo. MHU0O37AO) is acceptable for use in all explosion hazard areas and was used in the collection of samples reported In pajft one of the Chambers Works and fprua&ee Works surveys (Ref. 1 and 2). the sample must be collected at a uniform standard, 0.1 cubic feet per minute rate (Cfm), and at least one-cubic foot of air should be sampled. These units will operate unattended \ for three to four hours. A dry sampler, the "Chico Model 2.6 Respirable Dust Sampler" could be used to separate the respirable fran the ncoreapirsblc fraction, but la net recooiiaed by the Asbestos Textile Institute* 2. Aa an alternate the rechargeable battery po-ered "Unico DUP 0900859