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Water Pollution Compliance Programs

Compliance Inspection

Compliance Evaluation Inspection (CEI)
The CEI is a non-sampling inspection designed to verify permittee compliance with applicable permit self-monitoring requirements, effluent limits, and compliance schedules.  This inspection involves records reviews, visual observations, and evaluations of the treatment facilities, laboratories, effluents, receiving waters, etc.  The CEI examines both chemical and biological self-monitoring and forms the basis for all other inspection types except the Operations and Maintenance Inspection.

Compliance Sampling Inspection (CSI)
The CSI is one of the more intensive compliance inspections performed.  The CSI includes all the same objectives and tasks of a CEI as well as involving the collection of samples required by the permit.  Sample collection may be used to check a facility’s own sampling and laboratory analysis procedures, to check actual effluent quantity and quality, or to provide support for permitting or enforcement decisions.

Performance Audit Inspection (PAI)
The PAI is used to evaluate a facility’s self-monitoring program.  Through an in-depth review of the facility’s records and laboratory data, the inspector determines the quality of the data being submitted by the facility as required by their permit.  Facility sample collection techniques, flow calibrations, laboratory analysis procedures, techniques and reporting are all evaluated during this inspection.

Operation and Maintenance Inspection (O&M)
Sometimes referred to as a reconnaissance inspection, the O&M is the least intensive inspection type.  The O&M is used to provide a preliminary overview of a facility’s compliance program by performing as brief visual inspection of the facility’s treatment works, effluent and receiving waters or land application site.

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