Document gEgLzMOVb7wLMKRmZ7GVvw2o3

PRODUCT-` SUBJECT Sampling Rate Changes The 3M Organic Vapor Monitor Sampling Guide (May, 1981) J It is recommended that the Sampling Rates published in the new Compound Guide (May, 1981) be used in calculating contaminant concentrations for sampling done with the 3M Organic Vapor Monitor #3500. However, results obtained by use of previous Sampling Rate Data is within the + 25% OSHA performance requirement for all sampling methods. The new Compound Guide (May, 1981) is a result of a 3M R&D program directed toward gathering validation data on the 3M Organic Vapor Monitor. The project was similar in scope to the NIOSH Standards Completion Project which established the performance criteria for sampling methods (basically charcoal tube validation data). In completing this program, and over the past three years, increasingly more sophisticated methods of developing and handling experimental data evolved. This included the development of different techniques of generating known challenge concentrations, as well ns, increasing the number of samples run to yield a better statistical treatment of the data. As a result of this effort the Sampling Rates found in the new Sampling Guide are more accurate, more consistent within each chemical group. R-TDBLH<30.75)R Occupational Health and Safety Products Divisi n/3M 230-B 3M Center St. Paul, Minnesota 55101 3H 008370 Litho in U NUMBER-* PRODUCT; SUBJECT / Sampling Rate Changes The 3M Organic Vapor Monitor Sampling Guide (May, 1981) It is recommended that the Sampling Rates published in the new Compound Guide (May, 1981) be used in calculating contaminant concentrations for sampling done with the 3M Organic Vapor Monitor #3500. However, results obtained by use of previous Sampling Rate Data is within the + 25% OSHA performance requirement for all sampling methods. The new Compound Guide (May, 1981) is a result of a 3M R&D program directed toward gathering validation data on the 3M Organic Vapor Monitor. The project was similar in scope to the NIOSH Standards Completion Project which established the performance criteria for sampling methods (basiqally charcoal tube validation data). In completing this program, and over the past three years, increasingly more sophisticated methods of developing and handling experimental data evolved. This included the development of different techniques of generating known challenge concentrations, as well as, increasing the number of samples run to yield a better statistical treatment of the data. As a result of this effort the Sampling Rates found in the new Sampling Guide are more accurate, more consistent within each chemical group. AN1 AV/vM Al'.l II! i.m * (.lll'Aiii 'I i/U ! II Al li I AMI > \AI i 17 R-TDBLH(30.7S)R Occupational Health and Safety Products Division/3M 230-B 3M Center St. Paul, Minnesota 55101 3H 00S871 Ltlho in U