What key information should be collected during an on-site pretreatment inspection?

During an on-site pretreatment inspection, collecting a description of each discharge is essential because it provides important insights into the nature and composition of the wastewater being released. Understanding the specifics of what is being discharged allows for proper assessment of compliance with regulations, potential environmental impacts, and necessary treatment processes. This information helps ensure that the wastewater meets required standards before it enters the municipal sewer system or treatment plant, aiding in the protection of public health and the environment.

The other options, while they contain relevant information, do not directly address the fundamental need for understanding the characteristics of the discharges being inspected. A list of employees or the proximity of chemical storage might contribute to safety or operational assessments but do not directly pertain to the assessment of wastewater characteristics. The type of waste generated is also important, but without knowing the details of each specific discharge, it is challenging to evaluate treatment needs accurately. Collecting a detailed description of each discharge focuses on the most critical aspect of pretreatment inspection.