Loading (50 kb)...'
(continued)
for the last 12 months.
(4) Whether, based on section 64535.4(b), the
MRDL was violated.
Chlorine dioxide (1) The dates, results, and locations of samples
taken during the last quarter.
(2) Whether, based on section 64535.4(c), the
MRDL was violated.
(3) Whether the MRDL was exceeded in any two
consecutive daily samples and whether the
resulting violation was acute or nonacute.
Note: Authority cited: Sections 116325 and 116375, Health and Safety Code. Reference: Sections 116350, 116385, 116530 and 116555, Health and Safety Code.
s 64537.6. Disinfection Byproduct Precursors and Enhanced Coagulation or Enhanced Softening Reporting.
(a) Systems required to meet the enhanced coagulation or enhanced softening requirements in section 64536.2(a) or (b) shall report the following:
(1) The number of paired (source water and treated water) samples taken during the last quarter.
(2) The location, date, and result of each paired sample and associated alkalinity taken during the last quarter.
(3) For each month in the reporting period that paired samples were taken, the arithmetic average of the percent reduction of TOC for each paired sample and the required TOC percent removal.
(4) Calculations for determining compliance with the TOC percent removal requirements, as provided in section 64536.4(a).
(5) Whether the system is in compliance with the enhanced coagulation or enhanced softening percent removal requirements in section 64536.2 for the last four quarters.
(b) Systems meeting one or more of the alternative compliance criteria in section 64536(a) or (b), in lieu of meeting the requirements in section 64536.2(a) or (b), shall report the following:
(1) The alternative compliance criterion that the system is using.
(2) The number of paired samples taken during the last quarter.
(3) The location, date, and result of each paired sample and associated alkalinity taken during the last quarter.
(4) The running annual arithmetic average based on monthly averages (or quarterly samples) of source water TOC for systems meeting a criterion in sections 64536(a)(1) or (3) or of treated water TOC for systems meeting the criterion in section 64536(a)(2).
(5) The running annual arithmetic average based on monthly averages (or quarterly samples) of source water SUVA for systems meeting the criterion in section 64536(a)(5) or of treated water SUVA for systems meeting the criterion in section 64536(a)(6).
(6) The running annual average of source water alkalinity for systems meeting the criterion in section 64536(a)(3) and of treated water alkalinity for systems meeting the criterion in section 64536(b)(1).
(7) The running annual average for both TTHM and HAA5 for systems meeting the criterion in section 64536(a)(3) or (4).
(8) The running annual average of the amount of magnesium hardness removal (as CaCO 3, in mg/L) for systems meeting the criterion in section 64536(b)(2).
(9) Whether the system is in compliance with the particular alternative compliance criterion in section 64536(a) or (b).
Note: Authority cited: Sections 116325 and 116375, Health and Safety Code. Reference: Sections 116350, 116385, 116530 and 116555, Health and Safety Code.
s 64551. Applicability.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64553. Responsibility.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64555. Definitions.
(a) "Asphalt Institute Standard" means a standard or specification issued by the Asphalt Institute.
(b) "ASTM Standard" means a standard issued by the American Society for Testing and Materials (ASTM).
(c) "AWWA Standard" means a standard adopted by the American Water Works Association (AWWA).
(d) "Federal Specification" means a standard approved by the United States General Services Agency for use by federal agencies.
(e) "Flat Rate Water System" means a public water system where water deliveries to at least 50 percent of the service connections are not metered.
(f) "Metered Water System" means a public water system that is not a flat rate water system.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64560. Basic Design.
(a) Additions to or changes in distribution systems shall be designed and constructed to:
(1) Be free of structural and sanitary hazards.
(2) Protect the quality of the water delivered to users at all times.
(3) Protect the distribution system against contamination by backflow.
(4) Provide adequate size and capacity to meet the requirements of Sections 64562 and 64566.
(5) Withstand, with ample safety factors, the physical stresses imposed during normal operation.
(6) Minimize the effects of events such as power supply, equipment, and structural failures, earthquakes, fires, floods and sabotage that are reasonably foreseeable.
(7) Protect against unauthorized entry and/or vandalism.
(8) Protect against adverse effects in areas subject to freezing weather.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64561. Reliability.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64562. Quantity of Supply.
(a) Sufficient water shall be available from the water sources and distribution reservoirs to supply adequately, dependably and safely the total requirements of all users under maximum demand conditions before agreement is made to permit additional service connections to a system.
(b) To ascertain this, first determine the total capacity of the existing source by procedures prescribed in Section 64563 and determine the total storage volume of the existing distribution reservoirs. Then determine the needed source capacity and the needed storage volume by procedures prescribed in Section 64564. The total available source capacity shall not be less than the needed source capacity.
(c) The requirements of this section shall apply to an entire public water system and to each pressure zone within a public water system.
(1) Requirements for an entire public water system shall be determined from the total source capacity, total storage volume and the total number of service connections.
(2) Requirements for a particular pressure zone shall be determined from the total water supply available from the water sources and interzonal transfers directly supplying the zone, from the total storage volume within the zone and from the number of service connections within the zone.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64563. Procedures for Determining Source Capacity.
(a) The source capacity of a well shall be based on the sustained yield of the well or pump output, whichever is less.
(1) Sustained yield of a well shall be determined from a pump test or from historical records.
(2) The conditions of a pump test used to determine sustained yield of a well shall be acceptable to the Department and shall include:
(A) Constant rate of water discharge from the well during the pump test.
(B) Continuation of the pump test until at least four consecutive measurements of water level drawdown in the well and the elapsed time since the beginning of the pump test yield a straight line when the drawdown is plotted against the logarithm of the elapsed time.
(b) The source capacity of a surface water supply or a spring shall be the lowest anticipated daily yield, based on adequately supported and documented data.
(c) The source capacity of a purchased water connection between two public water systems shall be included in the total source capacity of the purchaser if the purchaser has sufficient storage or standby source capacity to meet user requirements during reasonably foreseeable shutdowns by the supplier.
(d) Where the capacity of a source varies seasonally, the source capacity shall be the capacity at the time of maximum day demand.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64564. Procedures for Determining Needed Source Capacity and Needed Storage Volume.
(a) Whenever possible, needed source capacity and needed storage volume shall be determined from existing water use records of the water system.
The records used shall clearly indicate total source capacity, total storage volume and maximum day demand of previous years.
The existing records of the water system may be supplemented as needed by the records of a similar water system acceptable to either the Department or a qualified registered engineer.
(b) When the existing records of the water system are inadequate to determine these values and no records of a similar water system can be found to supplement the existing records, the maximum day demand, the needed source capacity and the needed storage volume for typical residential and general commercial areas (without provisions for fire flow) shall be determined as follows:
(1) Determine the maximum day demand (Q subo) from Chart 1 or Chart 2.
(2) When the total capacity of the existing sources equals the maximum day demand (Q subo), the needed storage volume (V subo) to meet peak demand during the day shall be determined from Chart 3 or Chart 4.
(3) When the total storage volume of the existing reservoirs (V) is less than the needed storage volume (V subo), the existing sources shall be supplemented so that the needed source capacity (Q) is met. For a metered water system, Q = Q subo (2.5-1.5V/V subo) or for a flat rate water system, Q = Q subo (2-V/V subo).
(c) The needed source capacity and needed storage volume determined under (b) may be modified, with the approval of the Department, to reflect local conditions such as climate, community type and kinds of users. Unless the Department's written approval is obtained, the needed source capacity shall not be less than the maximum day demand.
(d) The data used and the calculation made by the water supplier to determine whether sufficient water is available to accommodate additions to the systems must be kept and are subject to the Department review and approval at its discretion.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64565. Department Approval of Source and Storage Capacities.
Note: Authority cited: Sections 208, 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64566. System Pressure.
(a) Changes in distribution systems shall be designed to maintain an operating pressure at all service connections of not less than 20 pounds per square inch gauge (psig) (140 kiloPascals gauge (kPag)) under the following demand conditions:
(1) User maximum hour demand.
(2) User average day demand plus design fire flow.
(b) In a public water system supplying users at widely varying elevations, a water supplier may furnish a service to a user which does not comply with (a) if the user is fully advised of the conditions under which minimum service may be expected and the user's agreement is secured in writing. This waiver shall be applicable only to individual service connections.
(c) Water mains shall be designed to have at least five psig (35 kPag) pressure throughout any buried length of the main except when the main is removed from service for repairs or maintenance. This requirement shall not apply to short lengths of water main near reservoir inlets and outlets provided:
(1) The water main is on premises owned, leased or controlled by the water supplier; or
(2) The prior review and written approval of the Department is obtained.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64568. Conditions for Adding Service Connections.
A new service connection may be added to a distribution system only if the water system will comply with Section 64562 after the new service connection is added and adding the new service connection will not cause pressure at an existing service connection to be reduced below the standards set in Section 64566.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64570. Internal Combustion Engines.
(a) Where water cooling jackets for internal combustion engines are connected to water mains, the jacket shall be designed so that the water pressure inside the water main at the cooling jacket will at all times be greater than the engine coolant pressure.
(b) Backflow protection of the public water system shall be provided wherever makeup water is supplied to the cooling system of an internal combustion engine.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64600. Basic Design of Distribution Reservoirs.
(a) Distribution reservoirs shall be covered.
(b) Vents, overflows, drain outlets and other reservoir openings shall be located and constructed to protect the water stored in the reservoir from contamination. Vents and overflows shall be screened. Vents shall not open upward. Overflows shall be large enough to dispose of reservoir overflow rates equal to the maximum reservoir filling rate.
(c) Provisions shall be made to facilitate removal of floating material from the free water surface and for dewatering the reservoir.
(d) Outlets shall be designed and constructed to minimize movement of sediment from the reservoir floor to the distribution system water mains.
(e) Provisions shall be made for isolating reservoirs and appurtenant facilities from the distribution system without causing violation of Section 64566.
(f) Unless the Department's approval is obtained, distribution reservoir sites shall not be used for nonwater works purposes that would:
(1) Result in unrestricted public access.
(2) Create a contamination hazard.
(g) Reservoirs shall be disinfected and sampled for bacteriological quality in accordance with the procedures described in "Methods for Disinfecting Tanks and Reservoirs," American Water Works Association Journal, 71(1):49-50 (January 1979).
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64602. Subsurface Distribution Reservoirs.
(a) Subsurface distribution reservoirs shall be lined and shall be located:
(1) Above maximum anticipated ground water level.
(2) At least 50 feet (15 meters) from the nearest sewer and at least 150 feet (45 meters) from all other sewerage facilities.
(b) The land adjacent to a subsurface distribution reservoir shall be graded to route surface water away from the reservoir.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64604. Corrosion Protection.
Paints or other protective coatings shall comply with AWWA Standard D102-78.
Note: Authority cited: Section 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64610. Basic Design of Pumping Stations.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64612. Water Sealed Pumps.
Seal water for water sealed pumps shall meet the water quality requirements of the Domestic Water Quality and Monitoring Regulations, Title 22, California Administrative Code, Chapter 15. Adequate drainage shall be provided for disposal of used seal water.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64622. Water Main Materials.
(a) Water main materials shall meet the applicable standards listed in Table I.
(b) Cast iron and ductile iron pipe shall be cement mortar lined in accordance with AWWA Standard C104/A21.4-80.
(c) Steel pipe shall be protected from internal and external corrosion. Table II lists various acceptable protective coatings and linings with appropriate standards.
Table I
Material Standards
Pipe Material Standard
Abestos-Cement AWWA C400-80 or C402-77
Cast Iron AWWA C106-75
Ductile Iron AWWA C151/A21.51-81
Steel AWWA C200-80
Copper AWWA C800-66
Concrete AWWA C300-82, C301-79, C302-74
or C303-78
Polybutylene AWWA C902-78
Polyethylene AWWA C901-78
Polyvinyl Chloride AWWA C900-81
Glass Reinforced
Thermosetting Resin AWWA C950-81
Table II
Steel Pipe Coatings and Linings
Type of Coating or Lining Standard
Cement Mortar Coating or Lining AWWA C205-80 or Federal
Specification SS-P-385a
Coal Tar Coating, Lining or AWWA C203-78
Wrapping
Asphalt Mastic Coating Asphalt Institute M-2 CS-96
Extruded Plastic Coating Federal Specification L-C-530B (1972)
Rubber-Alkyd Paint Coating AWWA C204-75
Cold Applied Tape Coating AWWA C209-76
Coal Tar-Epoxy Coating AWWA C210-78
Asphalt Coating and Wrapping Standard Specifications for Public
Works Construction (1973),
Section 207-10.4.4
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64624. Water Main Selection and Installation.
(a) Steel pipe shall be selected and installed in accordance with American Water Works Association (AWWA) Manual M-11 (1964), "Steel Pipe -Design and Installation." The design shall comply with Sections 6.1 and 6.2 of the manual, except that the minimum design pressure shall be at least the maximum anticipated system pressure, but in no case less than 150 psig (1,030 kPag).
(b) Asbestos-cement, cast iron and ductile iron pipe shall be selected and installed in accordance with the standards listed in Table III.
(c) Polyvinyl chloride pipe shall be selected and installed in accordance with Appendix A of AWWA Standard C900-81.
(d) Polybutylene pipe shall be selected and installed in accordance with Appendix A of AWWA Standard C902-81.
(e) Polyethylene pipe shall be selected and installed in accordance with Appendix A of AWWA Standard C901-81.
(f) Plastic pipe shall not be used in areas subject to contamination by petroleum distillates.
Table III
Pipe Selection and Installation Standards
Type of Pipe Standards
Asbestos-Cement AWWA C401-83, C403-78 and C603-78
Cast Iron AWWA C600-82
Ductile Iron AWWA C150/A21.5-81 and C600-82
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64626. Layout of Water Mains.
(a) Water mains should be laid out only in segmented grids and loops and should be located within streets. Dead-end water mains shall be installed only if:
(1) Looping or gridding is impractical due to topography, geology, pressure zone boundaries, unavailability of easements or locations of users; or
(2) The main is to be extended in the near future and the planned extension will eliminate the dead-end conditions.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64628. Minimum Water Main Diameter and Length of Run.
(a) Water mains shall have a nominal inside diameter of at least four inches (100 mm).
(b) Dead-end water mains exceeding 1,000 feet (300 meters) in length shall be constructed of pipe with a nominal inside diameter of at least 6 inches (150 mm).
(c) Dead-end water mains exceeding 2,000 feet (600 meters) in length shall be constructed of pipe with a nominal inside diameter of at least 8 inches (200 mm).
(d) The requirements of (a), (b) and (c) shall not apply to water main installations meeting one of the following criteria:
(1) The installation is designed under the direction of a qualified registered engineer to meet the requirements of Section 64566.
(2) The installation is approved by the Department prior to construction.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64630. Water Main Installation.
(a) Water mains shall be installed below the frost line or shall otherwise be protected to prevent freezing.
(b) Water mains shall not have less than 30 inches (0.75 meters) of cover over the top of the pipe except where necessary to avoid underground obstructions or rocky conditions.
(c) Water mains shall be installed at least:
(1) Ten feet (3 meters) horizontally from and 1 foot (0.3 meters) higher than sanitary sewers located parallel to the main.
(2) One foot (0.3 meters) higher than sanitary sewers crossing the main.
(3) Ten feet (3 meters), and preferably 25 feet (7.5 meters), horizontally from sewage leach fields, cesspools, seepage pits and septic tanks.
(d) Separation distances specified in (c) shall be measured from the nearest edges of the facilities.
(e) Where the requirements of (c) and (d) cannot be met due to topography, inadequate right-of-way or easements or conflicts with other provisions of these regulations, lesser separation is permissible if:
(1) The water main and the sewer are located as far apart as feasible within the conditions listed above.
(2) The water main and the sewer are not installed within the same trench.
(3) The water main is appropriately constructed to prevent contamination of the water in the main by sewer leakage.
(f) Water mains shall be disinfected according to AWWA Standard C601-81 before being placed in service.
(g) Installation of water mains near the following sources of potential contamination shall be subject to written approval by the Department on a case-by-case basis:
(1) Storage ponds or land disposal sites for waste water or industrial process water containing toxic materials or pathogenic organisms.
(2) Solid waste disposal sites.
(3) Facilities such as storage tanks and pipelines where malfunction of the facility would subject the water in the main to toxic or pathogenic contamination.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64632. Water Main Valve Locations.
Sufficient valves shall be provided on water mains to minimize inconvenience and sanitary hazards during repairs. In general, valves on water mains of 12 inches (300 mm) and smaller diameter should be located such that water main lengths of not more than 1,000 feet (300 meters) can be isolated by valve closures.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64634. Water Main Valve Construction Standards.
(a) Water main valves of the types listed in Table IV shall conform to the standards shown in Table IV.
(b) A valve box shall be installed over each valve stem to aid in locating and operating the valve.
Table IV
Water Main Valve Construction Standards
Type of Valve Construction Standard
Gate Valve AWWA C550-80
Butterfly Valve AWWA C504-80
Ball Valve AWWA C507-73
Swing Check Valve AWWA C508-82
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64636. Air and Vacuum Relief and Air Release Valves.
(a) Vent openings for air and vacuum relief and air release valves shall be:
(1) Extended at least one foot (0.3 meters) above grade and above maximum recorded high water.
(2) Provided with a screened, downward facing vent opening.
(b) Where the requirements of (a) (1) cannot be practicably met, vent openings may be located in a subsurface chamber or pit under the following conditions:
(1) The pit is adequately drained.
(2) The pit drain is not connected by pipe or other closed conduit to a sewer or storm drain without an air gap separation.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64638. Water Main Joints.
Joints and appurtenances shall safely withstand the same working pressures for which the water main is designed. Jute shall not be used as a backup gasket material.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64640. Fire Hydrants.
Fire hydrant laterals shall be provided with shutoff valves.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64642. Flushing Valves and Blowoffs.
(a) A flushing valve or blowoff shall be installed at the end of each dead-end water main where stagnant conditions are likely to develop.
(b) Flushing valves and blowoffs shall be capable of establishing the minimum continuous flushing flow in the main indicated by Table V.
(c) Flushing valves and blowoffs shall not discharge to a sewer without an air gap separation.
Table V
Minimum Water Main Flushing Flow
#Nominal Inside Diameter Minimum Flushing Flow
Inches Millimeters Gallons/Milnute Liters/Second
2 50 25 1.5
3 75 50 3.4
4 100 100 6.3
6 150 225 14
8 200 400 25
10 250 600 38
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64644. Service Connection Pipe.
Service connection pipe and fittings shall be designed for cold water working pressures of not less than 150 psig (1,030 kPag). Copper tubing shall be commercial designation type K or L. Plastic tubing and fittings shall be products tested and certified as suitable for use in potable water piping systems by the National Sanitation Foundation Testing Laboratory, the Canadian Standards Association Testing Laboratory or another testing agency acceptable to the Department.
Note: Authority cited: Sections 208 and 4010.1 (h), Health and Safety Code. Reference: Sections 4010.1 (h), 4012, 4013 and 4019, Health and Safety Code.
s 64650. General Requirements.
(a) For a supplier using an approved surface water, as defined in section 64651.10, this chapter establishes treatment techniques in lieu of maximum contaminant levels for turbidity and the following microbial contaminants: Giardia lamblia (cysts), viruses, heterotrophic plate count bacteria, and Legionella.
(b) Each supplier using an approved surface water shall provide multibarrier treatment necessary to reliably protect users from the adverse health effects of microbiological contaminants and to comply with the requirements and performance standards prescribed in this chapter. A supplier that meets the requirements of section 64652.5 and wishes to not be required to provide multibarrier treatment shall submit an application to the Department. That application shall consist of comprehensive documentation that either demonstrates current compliance with the requirements in section 64652.5 or demonstrates that the water system will be in compliance within fifteen months from application submittal. Within 30 days, the Department will review the application and inform the applicant in writing that the application is complete and accepted for filing, or that the application is deficient and what specific information is required. Within 90 days from the date the application is accepted for filing, the Department will complete its review of the documentation, determine whether to approve the application, and notify the water supplier. If at any time the Department determines that a water supplier is not in compliance with the requirements of this chapter, the Department will notify the supplier of that determination within 30 days of its being made.
(c) Except as provided for existing treatment plants in section 64652(c), within 90 days from the date of notification by the Department pursuant to subsection (b), the supplier shall submit for Department approval a plan and schedule to modify its system to meet the requirements of this chapter.
(d) If the supplier disagrees with the Department's notification specified in subsection (b), then the supplier shall submit reasons for its disagreement within 30 days from the receipt of the notification. The Department shall notify the supplier of its final determination in writing within 30 days of receipt of the supplier's reasons for disagreement. If the Department's final determination is that the supplier does not meet the requirements of this chapter, then the supplier shall comply with provisions of subsection (c) within 90 days of receipt of the Department's final determination.
Note: Authority cited: Sections 100275 and 116375, Health and Safety Code. Reference: Sections 116270, 116275, 116350, 116365, 116375, 116385, 116390, 116400, 116525, 116530, 116535, 116540, 116550 and 116625, Health and Safety Code.
s 64651.10. Approved Surface Water.
"Approved surface water" means a surface water or groundwater under the direct influence of surface water that has received permit approval from the Department in accordance with sections 4011 through 4016 of the Health and Safety Code.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.16. Coagulant Chemical.
"Coagulant chemical" means a floc-forming agent that has been demonstrated to provide coagulation.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.20. Coagulation.
"Coagulation" means a process using coagulant chemicals and rapid mixing, by which colloidal and suspended material are destabilized and agglomerated into settleable and/or filterable flocs.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.23. Conventional Filtration Treatment.
"Conventional filtration treatment" means a series of treatment processes which includes coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.26. Diatomaceous Earth Filtration.
"Diatomaceous earth filtration" means a process resulting in particulate removal in which a precoat cake of graded diatomaceous earth filter media is deposited on a support membrane (septum) and, while the water is being filtered by passing through the cake on the septum, additional filter media known as body feed is continuously added to the feed water to maintain the permeability of the filter cake.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.30. Direct Filtration Treatment.
"Direct filtration treatment" means a series of processes including coagulation, flocculation, and filtration but excluding sedimentation.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1. 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.32. Disinfectant Contact Time.
"Disinfectant contact time" means the time in minutes that it takes for water to move from the point of disinfectant application or a previous point of disinfectant residual measurement to a point before or at the point where residual disinfectant concentration is measured. Disinfectant contact time in pipelines is calculated by dividing the internal volume of the pipe by the flow rate through the pipe. Disinfectant contact time within mixing basins and storage reservoirs is determined by tracer studies or an equivalent demonstration to the Department.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.33. Disinfection.
"Disinfection" means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.36. Engineering Report.
"Engineering report" means a water treatment technical report prepared by a qualified engineer.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1. 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.40. Filter-To-Waste.
"Filter-to-waste" means a provision in a filtration process to allow the first filtered water, after backwashing a filter, to be wasted or reclaimed.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.43. Filtration.
"Filtration" means a process for removing particulate matter from water by passage through porous media.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.46. Flocculation.
"Flocculation" means a process to enhance agglomeration or collection of smaller floc particles into larger, more easily settleable or filterable particles through gentle stirring by hydraulic or mechanical means.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.50. Groundwater Under the Direct Influence of Surface Water.
"Groundwater under the direct influence of surface water" means any water beneath the surface of the ground with significant occurrence of insects or other macroorganisms, algae or large diameter pathogens such as Giardia lamblia, or significant and relatively rapid shifts in water characteristics such as turbidity, temperature, conductivity or pH which closely correlate to climatological or surface water conditions.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1 4023.3, 4024, 4025, 4026.4 and 4031, Health and Safety Code.
s 64651.53. Legionella.
"Legionella" means a genus of bacteria, some species of which have caused a type or pneumonia called Legionnaires disease.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4 and 4031, Health and Safety Code.
s 64651.56. Multibarrier Treatment.
"Multibarrier treatment" means a series of water treatment processes that provide for both removal and inactivation of waterborne pathogens.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.60. NTU (Nephelometric Turbidity Unit).
"Nephelometric Turbidity Unit (NTU)" means a measurement of the turbidity of water as determined by the ratio of the intensity of light scattered by the sample to the intensity of incident light, using instrumentation and methods as set forth in "Standard Methods for the Examination of Water and Wastewater," 1985, American Public Health Association, et al., 16th edition, pages 134-136.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.63. Pressure Filter.
"Pressure filter" means a pressurized vessel containing properly sized and graded granular media.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.66. Qualified Engineer.
"Qualified engineer" means a Civil Engineer, registered in the State of California, with 3 years experience in water treatment design, construction, operation, and watershed evaluations.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.70. Residual Disinfectant Concentration.
"Residual disinfectant concentration" means the concentration of the disinfectant in milligrams per liter (mg/l) in a representative sample of water.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code, Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.73. Sedimentation.
"Sedimentation" means a process for removal of settleable solids before filtration by gravity or separation.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.76. Slow Sand Filtration.
"Slow sand filtration" means a process involving passage of raw water through a bed of sand at rates not to exceed 0.10 gallons per minute per square foot resulting in substantial particulate removal by physical and biological mechanisms.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4017, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.80. Supplier.
"Supplier," for the purpose of this chapter, means the owner or operator of a water system for the provision to the public of piped water for human consumption, provided such system has at least 15 service connections or regularly serves at least 25 individuals daily at least 60 days out of the year.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4017, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.83. Surface Water.
"Surface water" means all water open to the atmosphere and subject to surface runoff. For purposes of this chapter, water runoff originating from the lined walls and other man-made appurtenant structures of treated water distribution reservoirs, is excluded from the definition of surface water.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4 and 4031, Health andSafety Code.
s 64651.86. Turbidity Level.
"Turbidity level" means the value in NTU obtained by measuring the turbidity of a representative grab sample of water at a specified regular interval of time. If continuous turbidity monitoring is utilized, the turbidity level is the discrete turbidity value at a given time.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64651.90. Virus.
"Virus" means a virus of fecal origin which is infectious to humans by waterborne transmissions.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4 and 4031, Health and Safety Code.
s 64651.91. Waterborne Microbial Disease Outbreak.
"Waterborne microbial disease outbreak" means the significant occurrence of acute infectious illness, epidemiologically associated with the ingestion of water from a public water system which is deficient in treatment, as determined by a County Health Officer or the Department.
Note: Authority cited: Sections 100275 and 116375, Health and Safety Code. Reference: Sections 116270, 116275, 116350, 116365, 116385, 116390, 116400, 116525, 116530, 116535, 116540, 116550 and 116625, Health and Safety Code.
s 64651.93. Watershed.
"Watershed" means the area contained in a drainage basin which is tributary to a water supply diversion point.
Note: Authority cited: Sections 208 and 4023.3, Health and Safety Code. Reference: Sections 4010, 4010.1, 4011, 4012, 4013, 4014, 4016, 4023.1, 4023.3, 4024, 4025, 4026.4, and 4031, Health and Safety Code.
s 64652. Treatment Requirements and Compliance Options.
(a) Each supplier using an approved surface water shall provide multibarrier treatment that meets the requirements of this chapter and reliably ensures at least:
(1) A total of 99.9 percent reduction of Giardia cysts through filtration and disinfection; and
(2) A total of 99.99 percent reduction or viruses through filtration and disinfection.
(b) Suppliers meeting the requirements of section 64654 in combination with either section 64652.5 or 64653 shall be deemed to be in compliance with the minimum reduction requirements specified in section 64652(a).
(c) For treatment plants existing as of June 13, 1990, which do not consist of the approved technologies specified in section 64653(a), or are not in compliance with the design criteria specified in section 64658, the supplier shall submit a report demonstrating that the plant can be operated to reliably produce water meeting the performance requirements of sections 64653 and 64654. This demonstration shall be a presentation and analysis of the latest 12 months of operating data, and special studies conducted to test the performance of the plant under adverse water quality conditions or other means. The supplier shall submit the required report within 15 months of being notified by the Department pursuant to section 64650(b) that their plant does not consist of the approved technologies.
(d) No variances from the requirements in this section are permitted.
Note: Authority cited: Sections 100275 and 116375, Health and Safety Code. Reference: Sections 116270, 116275, 116365, 116375, 116385, 116390, 116400, 116525, 116530, 116535, 116540, 116550, 116555, 116625 and 116735, Health and Safety Code.
s 64652.5. Criteria for Avoiding Filtration.
(a) A public water system that uses an approved surface water shall meet all of the requirements of this section to avoid the necessity of providing filtration. Within 18 months of the failure of a system using an approved surface water to meet any one of the requirements of Subsections (b) through (l), the system shall have installed filtration and meet the requirements for filtered systems specified in sections 64653, 64658, 64659, 64660, and 64661.
(b) The approved surface water quality shall be monitored downstream of all surface water and groundwater under the influence of surface water contributions and upstream of the first or only point of disinfectant application, as follows:
(1) For fecal or total coliform density at the following minimum frequency each week:
System size (persons served) Samples/week
<=500 1
501-3,300 2 [FNA1]
3,301-10,000 3 [FNA1]
10,001-25,000 4 [FNA1]
> 25,000 5 [FNA1]
[FNA1] Shall be taken on separate days.
(2) For fecal or total coliform density, once every day the turbidity of the source water exceeds 1 NTU unless the Department determines that the system, for logistical reasons outside the system's control, is unable to have the sample analyzed within 30 hours of collection. If collected, these samples count toward the weekly coliform sampling requirement.
(3) For turbidity at a minimum frequency of once every four hours. A supplier may substitute continuous turbidity monitoring for grab sample monitoring if, at regular intervals, it validates the accuracy of the continuous measurement using a protocol approved by the Department.
(c) The approved surface water quality monitored pursuant to Subsection (b) shall meet the following criteria:
(1) The fecal coliform concentration shall be equal to or less than 20/100 ml, or the total coliform concentration shall be equal to or less than 100/100 ml, in representative samples of the approved surface water in at least 90 percent of the measurements made for the six previous months that the system served unfiltered approved surface water to the public on an ongoing basis. If a system measures both fecal and total coliforms, the fecal coliform criterion, not the total coliform criterion, in this paragraph shall be met.
(2) The turbidity level shall not exceed 5 NTU in representative samples of the approved surface water unless:
(A) The Department determines that any such event was caused by circumstances that were unusual and unpredictable; and
(B) As a result of any such event, there have not been more than two events in the past 12 months the system served unfiltered approved surface water to the public, or more than five events in the past 120 months the system served unfiltered approved surface water to the public, in which the turbidity level exceeded 5 NTU. An "event" is one day or a series of consecutive days during which at least one turbidity measurement each day exceeds 5 NTU.
(d) Water quality information collected pursuant to subsection (a) shall be reported to the Department in conformance with the requirements of 40 CFR section 141.75(a)(1) (54 Fed. Reg. 27535, June 29, 1989).
(e) The supplier shall maintain a watershed control program which minimizes the potential for contamination by Giardia cysts and viruses in the source water. The adequacy of a program to limit potential contamination by Giardia cysts and viruses shall be determined by: the comprehensiveness of the watershed review; the effectiveness of the supplier's program to monitor and control detrimental activities occurring in the watershed; and the extent to which the water system has maximized land ownership and/or controlled land use within the watershed. At a minimum, the watershed control program shall:
(1) Characterize the watershed hydrology and land ownership;
(2) Identify watershed characteristics and activities which may have an adverse effect on water quality;
(3) Monitor the occurrence of activities which may have an adverse effect on water quality. The supplier shall demonstrate through ownership and/or written agreements with landowners within the watershed that it can control all human activities which may have an adverse impact on the microbiological quality of the water. The supplier shall submit an annual report to the Department that identifies any special concerns about the watershed and how they are being handled; describes activities in the watershed that affect water quality; and projects what adverse activities are expected to occur in the future and how the public water system expects to address them; and (continued)