Indiana Administrative Code
Title 357 - INDIANA PESTICIDE REVIEW BOARD
Article 1 - DEFINITION; USE OF PESTICIDES
Rule 10 - Regulation of Pesticides Near Community Public Water Supply System Wells
Section 10-1 - Definitions

(1) "Community public water supply system" or "CPWSS" means a public water supply system as referenced in 327 IAC 8-4.1-1(5) that serves at least fifteen (15) service connections used by year-round residents or regularly serves at least twenty-five (25) year-round residents.

(2) "Discharge" means a release of a pesticide from a storage container into secondary containment.

(3) "Impervious surface" means a surface composed of a watertight material that effectively prevents discharged pesticide from impacting the soil or ground water, and from reaching a drinking water well or dry well, storm or sanitary sewer, or septic system.

(4) "Isolation area" means an area as referenced in 327 IAC 8-3.4-9, which is established around a CPWSS production well, to protect ground water from direct contamination by pesticides.

(5) "Public water supply system" or "PWSS" means a public water supply as established by 326 IAC 8-4.1-1(20) for the provision to the public of piped water for human consumption if such a system has at least fifteen (15) service connections or regularly serves an average of at least twenty-five (25) individuals daily at least sixty (60) days out of the year.

(6) "Secondary containment" means any structure, such as a dike, used to contain pesticide discharge from storage containers and prevent run-off or leaching.

(7) "State chemist" means the Indiana state chemist or his appointed agent.

(8) "Time of travel" or "TOT", as referenced in 327 IAC 8-4.1-1(25), means the calculated length of time that a particle of water takes to reach a CPWSS production well from a certain point.

(9) "Time of travel threshold" means a minimum five (5) year TOT for modeled wellhead protection areas or three thousand (3,000) feet for fixed radius wellhead protection areas as delineated in 327 IAC 8-4.1-1(26).

(10) "Wellhead protection area" or "WHPA" as referenced in 327 IAC 8-4.1-1(27) means the surface and subsurface area that contributes water to a CPWSS production well or well field and through which contaminants are likely to move and reach the well within the TOT threshold.