62-520.420. Standards for Class G-I and Class G-II Ground Water

(1) In addition to the minimum criteria in Rule 62-520.400, F.A.C., the primary and secondary drinking water quality standards for public water systems established pursuant to the Florida Safe Drinking Water Act, which are listed in Rules 62-550.310 and 62-550.320, F.A.C., shall apply to Class G-I and Class G-II ground water. Exceptions are for existing installations not having to meet secondary standards as provided in Rule 62-520.520, F.A.C., and subsection (4) below; that the total coliform bacteria standard shall be 4 per 100 milliliters; and that the primary drinking water standard for public drinking water systems for asbestos shall not apply as a ground water standard.

(2) If the concentration for any constituent listed in subsection (1) above in the natural background quality of the ground water is greater than the stated maximum, or in the case of pH is also less than the minimum, the representative natural background quality shall be the prevailing standard for Class G-I and Class G-II ground water.

(3) Where natural background quality of the ground water cannot be determined in the upgradient well, and the concentration for any constituent listed in subsection (1) above in the background quality of the ground water is greater than the stated maximum, or for pH is also less than the minimum, the representative background quality shall be the prevailing standard for those installations.

(4) These primary and secondary standards shall not apply within a zone of discharge as provided in Rule 62-520.465, F.A.C. The minimum criteria specified in Rule 62-520.400, F.A.C., shall apply within the zone of discharge.

Rulemaking Authority 403.061 FS. Law Implemented 403.021, 403.061, 403.087, 403.088 FS. History–Formerly 17-3.101, Amended and Renumbered 1-1-83, Formerly 17-3.404, Amended 9-8-92, 10-6-92, 4-14-94, Formerly 17-520.420, Amended 7-12-09.