Table 1.
Variables available in the IMIS and Salt Lake City OSHA laboratory electronic database.
| Field | Data type | Description |
| Variables common to IMIS and the CEHD dataset | ||
| Inspection number | Category | Unique identifier tied to each inspection |
| Establishment name | Text | Establishment name associated to inspection (names contained in the IMIS are not unique; i.e. there may be more than one variation in the way a single establishment is spelled) |
| City | Text | Identifies the site city where the inspection was performed |
| State | Category | Identifies the site state where the inspection was performed |
| Zip code | Category | Identifies the site zip code where the inspection was performed |
| SIC code | Category | Indicates the four-digit Standard Industrial Classification Code from the 1987 or 1972 version (record prior to 1987 are coded according to the 1972 system) |
| NAISC code | Category | North American Industrial Classification System Code (Starting in 1997) |
| Sampling number | Category | Unique identifier tied to single exposure assessment (there may be multiple media tied to this number in the CEHD dataset, reflecting multiple samples used for the calculation of a time-weighted sample) |
| Office id | Category | Unique number assigned to an OSHA Office |
| Date sampled | Date | Date sample was taken |
| IMIS substance code | Category | IMIS substance code number |
| IMIS Substance name | Category | Substance chemical name |
| Variables specific to IMIS | ||
| State or federal | Category | Activity related to a state or federal OSHA plan |
| Inspection type | Category | Type of inspection: Un-programmed (complaint, referral by a safety officer, accident, follow-up, related to another inspection) Programmed (planned, related to another inspection) |
| Inspection coverage | Category | Comprehensive or partial survey of the establishment |
| Establishment size | Continuous | Number of employees in the company monitored |
| Employee covered | Continuous | Number of employees covered by the inspection |
| Employees exposed | Continuous | Number of employees in the exposure group associated with the record |
| Union status | Category | Union is present or not in the company monitored |
| Job title | Text | Short description of occupation |
| Frequency of exposure | Text | Short description of the frequency of exposure (e.g. 40 h per week) |
| Sample type | Category | Type of sample: Area, personal, blood, screening, urine, wipe, bulk |
| Exposure type | Category | Type of exposure: TWA, short-term exposure limit, ceiling, peak, non-detect, dose (noise), sound (noise level), not analysed, not valid |
| Advance notice given | Yes/no | The company was warned that an inspection would take place |
| Presence of employee representative | Yes/no | Employee representatives were present during the inspection |
| Interview of employees | Yes/no | Employees were interviewed during the inspection |
| Field | Data type | Description |
| Variables specific to the CEHD data | ||
| Instrument type | Text | Brief description of the laboratory instrument used for analysis |
| Lab number | Category | Unique identifier assigned by laboratory for internal use |
| Field number | Category | Unique identifier tied to an individual sample media submitted for analysis |
| Sample type | Category | Sample type of the measurement (Personal, Area, Bulk, Wipe, Screening) |
| Blank used | Yes/no | Sample represents an analytical blank |
| Time sampled | Continuous | Sample time in minutes |
| Air volume sampled | Continuous | Air volume sampled in liters |
| Sample result | Continuous | Sample result in concentration unit |
| Unit of measurement | Category | Unit of measurement (mg/m3, micrograms, Parts per million, milligrams, fibers/cc, percentage) |
| Sample weight | Continuous | Sample weight for bulks and silica samples (in mg) |
| Qualifier | Category | Identifies a sample as non-detect, analytical blank, approximate value, or member of a series of samples |