4.1. ERMUSR 01-08-2013 - Laserfiche WebLink

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Emergency Standby Well means a well that is pumped by a public water supply system only during emergencies such as when an adequate water supply cannot be achieved because one or more primary or seasonal water supply well cannot be used. Inner Wellhead Management Zone (IWMZ) means the land that is within 200 feet of a public water supply well (MR4720.5100, subpart 19). The public water supplier must manage the IWMZ to help protect it from sources of pathogen or chemical contamination that may cause an acute health effect. Non-point Source Contamination refers to contamination of the drinking water aquifer that is caused by polluted runoff or pollution sources that cannot be attributed to a well-defined origin, e.g., runoff from agricultural fields, feedlots or urban areas. Point Source Contamination refers to contamination of the drinking water aquifer that is attributed to pollution arising from a well-defined origin, such as discharge from a leaking fuel tank, a solid waste disposal site, or an improperly constructed or sealed well. Primary Water Supply Well means a well that is regularly pumped by a public water supply system to provide drinking water. Seasonal Water Supply Well means a well that is only used to provide drinking water during certain times of the year either when pumping demand cannot be met by the primary water supply well(s) or for a facility, such as a resort, that is closed to the public on a seasonal basis. Vulnerability refers to the likelihood that one or more contaminants of human origin may enter either I)a water supply well that is used by the public water supplier or 2)an aquifer that is a source of public drinking water. WHP Area (WHPA) is the surface and subsurface area surrounding a well or well field that supplies a public water system,through which contaminants are likely to move toward and reach the well or well field (Minnesota Statutes, Part 1031.005, subdivision 24). WHP Plan Goal means an overall outcome of implementing the WHP plan, e.g., Providing for a safe and adequate drinking water supply. WHP Measure means a method adopted and implemented by a public water supplier to prevent contamination of a public water supply, and approved by the Minnesota Department of Health under Minnesota Rules parts 4720.5110 to 4720.5590. WHP Plan Objective means a capability that is needed to achieve one or more WHP goals, e.g., implementing WHP measures to address high priority potential contamination sources within 5 years. 21