Florida Administrative Code › 62 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 62 - Departmental › Chapter 62-555 - PERMITTING, CONSTRUCTION, OPERATION, AND MAINTENANCE OF PUBLIC WATER SYSTEMS › Section 62-555.315 - Public Water System Wells - Security; Number; Capacity; Under the Direct Influence of Surface Water; Control of Copper Pipe Corrosion and Black Water; and Disinfection and Bacteriological Surveys and Evaluations

Current through Reg. 50, No. 138; July 16, 2024
In addition to the rules set forth in Chapters 62-524 and
				  62-532, F.A.C., the requirements of this section apply to public water system
				  wells.
(1) Well Security. Wellheads
				shall be enclosed by fences with lockable access gates, housed in lockable
				buildings or enclosures, or otherwise protected against tampering, vandalism,
				and sabotage.
(2) Number of Wells.
				A minimum of two wells shall be connected to each community water system that
				is using only ground water and that is serving, or is designed to serve, 350 or
				more persons or 150 or more service connections.
(3) Well Capacity. The total well capacity
				connected to a water system using only ground water shall equal at least the
				system's design maximum-day water demand (including design fire-flow demand if
				fire protection is being provided). In addition, if the water system is a
				community system serving, or designed to serve, 350 or more persons or 150 or
				more service connections, the total well capacity with the largest producing
				well out of operation shall equal at least the design average daily water
				demand, and preferably the design maximum-day water demand, for the system. If
				a community water system interconnects with another community water system to
				meet the requirements in subsection (2), above, regarding number of wells, the
				total well capacity for the combined systems shall equal at least the total
				design maximum-day water demand for the combined systems and, with the largest
				producing well out of operation for the combined systems, shall equal at least
				the design average daily water demand, and preferably the design maximum-day
				water demand, for the combined systems.
(4) Wells Under the Direct Influence of
				Surface Water. Ground water from some wells, especially shallow wells and
				radial horizontal collector wells, and ground water from springs or
				infiltration galleries may be under the direct influence of surface water. The
				Department shall determine whether ground water is under the direct influence
				of surface water by using the procedures described in subsection
				 62-550.517(2),
				and subparagraph  62-550.817(2)(a) 
				1., F.A.C. Suppliers of water using ground water that is determined by the
				Department to be under the direct influence of surface water shall comply with
				applicable requirements under Rule
				 62-550.817, F.A.C.
(5) Control of Copper Pipe Corrosion and
				Black Water. Applicants for a construction permit to connect a new or altered
				well to a community water system, except those applicants who have submitted a
				complete application to the Department before August 28, 2003, shall include in
				the preliminary design report or design data accompanying their permit
				application the results of measurements for alkalinity, dissolved iron,
				dissolved oxygen, pH, total sulfide, and turbidity in a minimum of one sample
				of raw water from the new or altered well. These measurements may be performed
				by any authorized representative of the supplier of water or applicant; but
				field measurements for dissolved oxygen, pH, and turbidity shall be performed
				following the appropriate procedures in the Department of Environmental
				Protection Standard Operating Procedures for Field Activities, DEP-SOP-001/01,
				as incorporated into Rule
				 62-160.800, F.A.C., and all
				other measurements shall be performed using an appropriate method referenced in
				subsection  62-550.550(1),
				F.A.C., or in
Standard Methods for the Examination of Water and
				Wastewater
as adopted in Rule
				 62-555.335, F.A.C. If the result
				for total sulfide equals or exceeds 0.3 mg/L, the applicant shall do the
				following:
(a) Provide aeration or other
				appropriate treatment of the water from the new or altered well to remove total
				sulfide as necessary. Recommended types of aeration treatment for different
				water quality ranges are listed in the table below, which is incorporated
				herein as guidance and not as a requirement. Direct chlorination shall not be
				used to remove (i.e., oxidize) 0.3 mg/L or more of total sulfide unless the
				elemental sulfur formed during chlorination is removed.
POTENTIAL FOR IMPACTS WITHOUT TOTAL SULFIDE
							 REMOVAL
WATER QUALITY RANGES
POTENTIAL WATER TREATMENT
Low
Total Sulfide < 0.3 mg/L
Dissolved Iron < 0.1 mg/L1
Direct Chlorination2
Moderate
0.3 mg/L Total Sulfide 0.6 mg/L @ pH 7.2
or
0.3 mg/L Total Sulfide 0.6 mg/L @ pH > 7.2
Conventional Aeration3 (maximum removal efficiency
							 40-50%)
or
Conventional Aeration with pH Adjustment4, 5 (maximum
							 removal efficiency 40-50%)
Significant
0.6 mg/L < Total Sulfide 3.0 mg/L @ pH 7.2
or
0.6 mg/L < Total Sulfide 3.0 mg/L @ pH >
							 7.2
Forced Draft Aeration3 (maximum removal efficiency
							 90%)
or
Forced Draft Aeration with pH Adjustment4, 5 (maximum
							 removal efficiency 90%)
Very Significant
Total Sulfide > 3.0 mg/L
Packed Tower Aeration with pH Adjustment4, 5 (maximum
							 removal efficiency > 90%)
1. High iron content raises concern if chlorination
							 alone is used and significant dissolved oxygen exists in the source water.
							 Filtration may be required to remove particulate iron prior to water
							 distribution.
2. Direct chlorination of sulfide in water in the pH
							 range normally found in potable sources produces elemental sulfur and increased
							 turbidity. Finished-water turbidity should not be more than two nephelometric
							 turbidity units greater than raw-water turbidity.
3. Increased dissolved oxygen entrained during
							 aeration may increase corrosivity.
4. Reduction of alkalinity during pH adjustment and
							 high dissolved oxygen entrained during aeration may increase corrosivity.
							 Corrosion control treatment such as pH adjustment, alkalinity recovery, or use
							 of inhibitors may be required.
5. High alkalinity will make pH adjustment more
							 costly, and use of other treatment may be in order. Treatment that preserves
							 the natural alkalinity of the source water may enhance the stability of
							 finished water.
(b)
				Provide in the preliminary design report or design data accompanying the
				applicant's permit application a water quality and treatment evaluation
				affirmatively demonstrating that the secondary maximum contaminant levels for
				color and odor will not be exceeded in the water supplier's drinking water
				distribution system or in water customers' potable water
				systems.