What are the three components of a site sampling plan?

The three components of a site sampling plan are crucial for monitoring the quality of drinking water. The inclusion of microbiological samples, disinfection by-products samples, and lead and copper samples aligns well with the regulatory requirements to ensure safe drinking water.

Microbiological samples are essential for detecting pathogens that could lead to waterborne diseases, which is a primary concern in public health. They help in identifying any harmful bacteria, viruses, or protozoa present in the water supply.

Disinfection by-products samples are included because these compounds can form when disinfectants used to treat drinking water react with natural organic matter. Monitoring these by-products is important to comply with health standards and to reduce the associated health risks.

Lead and copper samples are critical for assessing the corrosiveness of water and ensuring that the water infrastructure does not leach harmful metals into the supply. Elevated levels of these metals can have serious health implications, particularly for vulnerable populations.

This combination of sampling components ensures a well-rounded approach to water quality assessment, addressing both chemical and microbiological safety, and thus making this choice the correct answer.