(a) Special Conditions for Underground Tank Storage. (Amendment of Section 2804.0 of Code and National Fire Protection Association Standard No. 30, paragraphs 2 and 3, as referenced in Appendix A of the Code.) There shall be a monitoring/recovery well located at each quadrant of the tank cavity or series of tanks in a single cavity. The well casing shall:
(1) Be a minimum of 12 inches in diameter;
(2) Be slotted from the bottom to at least 2 feet above the normal annual high water table;
(3) Have a minimum slot size of .010 inches;
(4) Be completed by wrapping in an appropriate filter cloth to prevent clogging and by backfilling with an appropriate clean filter pack;
(5) Be constructed of schedule 40 PVC or other material which is impervious to the pollutant stored and approved by the Fire Division;
(6) Be sealed into the bore hole at the surface with an impervious barrier designed to prevent contamination of the well by surface pollutants and damage to the well;
(7) Be equipped with a watertight cap with an opening not less than 12 inches in diameter;
(8) Be of such length that the bottom of the casing is at least 4 feet below the bottom of the storage tank.
(b) Testing Existing Underground Tanks and Piping. (Amendment to National Fire Protection Association’s Standards No. 30, paragraphs 2 to 7, as referenced in Appendix A of the Code.) Before underground tanks and piping are covered, enclosed or placed in use, or whenever the associated tank is tested, all integral piping systems shall be hydrostatically tested for tightness hydrostatically at not more than five lbs. per sq. inch.
(Ord. 1986-81. Passed 7-22-86; Ord. 2022-32. Passed 4-12-22.)