The attached report contains the health sampling data for respirable crystalline silica contained in the OSHA Integrated Management Information System for the period 2009 through 2014 for both Federal and State Programs.  Starting in 2011, the Federal Offices began transitioning to the OIS database, so the data after 2011 is primarily from the State Program Offices.   Also attached is a document that contains the IMIS data field descriptions.

The data fields included in the sheet are:

Inspection Number
SIC Code
NAICS Code
Region ID Number
Establishment Name
Number of Employees
Type of Inspection
Sampling Date
Job Description
Occupation Code
Units of Measurement: M=mg/m3; G=mppcf
IMIS Substance Code
Type of Sample
Exposure Level 
Type of Exposure
Frequency of Exposure
Number of Exposed Employees
Permissible Exposure Limit
Adjusted PEL Flag
Severity (Exposure/PEL)
Sample Number




