Compressed air systems are typicall

Compressed air systems are typically owned by the facility, whereas cylinder systems, liquefied gas systems, on site generation and bulk storage systems are typically rented or leased from qualified specialty gas suppliers.Expectations for sampling points for compressed air and process gas systems include:• Sampling points should be easily accessible• The location of a sampling point should avoid locations common to other clean utilities, e.g., high purity water or PS to prevent cross contamination• Sampling points should be clearly and uniquely identified on P&ID drawings and tagged in the field