California Administrative Code

“Combined distribution system” means the interconnected distribution system consisting of the distribution systems of wholesale systems and of the consecutive systems that receive finished water.

“GAC20” means granular activated carbon filter beds with an empty-bed contact time of 20 minutes based on average daily flow and a carbon reactivation frequency of once every 240 days.

“Groundwater under the direct influence of surface water” or “GWUDI” has the same meaning as defined in Section 64651.50.

“Level 2 assessment” means an evaluation, that provides a more detailed examination of the system (including the system's monitoring and operational practices) than does a Level 1 assessment through the use of more comprehensive investigation and review of available information, …

“SOC” means synthetic organic chemical.

“Source water assessment” means an evaluation of a drinking water source that includes delineation of the boundaries of the source area, identification of PCAs within the delineated area, a determination of the PCAs to which the source is most vulnerable, and a summary of the vul…

“Standby source” means a source which is used only for emergency purposes pursuant to Section 64414.

“Transient-noncommunity water system” means a public water system that is not a community water system or a nontransient-noncommunity water system.

“Treatment” means physical, biological, or chemical processes, including blending, designed to affect water quality parameters to render the water acceptable for domestic use.

(a) A public water system may request the State Board to invalidate a routine or repeat sample for which a total coliform-positive result has been reported if the system demonstrates: (1) All repeat sample(s) collected at the same tap as the original total coliform-positive sampl…

(a) A public water system shall determine whether a possible significant rise in bacterial count has occurred for each month in which it is required to monitor for total coliforms. Results of all samples collected in a calendar month pursuant to Sections 64423, 64424, and 64425 t…

(a) A public water system shall determine whether a coliform treatment technique trigger has been exceeded for each month in which it is required to monitor for total coliforms. Results of all samples collected in a calendar month pursuant to Sections 64423, 64424, and 64425 that…

(a) Each community and nontransient-noncommunity water system (system) shall comply with the primary MCLs in Table 64442 in the drinking water supplied to the public and use the DLRs for reporting monitoring results: Radionuclide MCL DLR Radium-226 1 pCi/L Radium-228 5 pCi/L (com…

A source that exceeds one or more of the secondary MCLs in Table 64449-A and does not have a waiver may be used only if the source meets the requirements in Section 64414, and the community water system: (a) Meters the source's monthly production and submits the results to the St…

(a) A water system shall give public notice pursuant to this section and section 64465 if any of the following occurs: (1) Violation of the E. coli MCL (as specified in section 64426.1(b)) (2) Violation of the MCL for nitrate, nitrite, or total nitrate and nitrite, or when the wa…

(a) A water supplier shall maintain records on all water quality and system water outage complaints received, both verbal and written, and corrective action taken. These records shall be retained for a period of five years for State Board review. (b) A water supplier shall retain…

(a) A Consumer Confidence Report shall contain information on the source of the water delivered, including: (1) The type of water delivered by the water system (e.g., surface water, ground water) and the commonly used name (if any) and location of the body (or bodies) of water; a…

(a) Community and nontransient noncommunity water systems shall monitor for TTHM and HAA5 at the frequencies and locations indicated in table 64534.2-A. COLUMN A Type of System COLUMN B Persons served COLUMN C Minimum monitoring frequency COLUMN D Sample location in the distribut…

(a) Systems not meeting any of the criteria identified in sections 64536(a) or (b) shall comply with requirements contained in sections 64536.2(a) or (b) and shall calculate compliance quarterly, beginning after the system has collected 12 months of data, by determining an annual…

(a) Systems required to sample quarterly or more frequently, pursuant to section 64534.2, 64534.4, or 64534.6, shall report to the State Board within 10 days after the end of each quarter in which samples were collected according to section 64469(c), notwithstanding the provision…

“Maximum day demand (MDD)” means the amount of water utilized by consumers during the highest day of use (midnight to midnight), excluding fire flow, as determined pursuant to Section 64554.

“Peak hour demand (PHD)” means the amount of water utilized by consumers during the highest hour of use during the maximum day, excluding fire flow, as determined pursuant to Section 64554.

“User service line” means the pipe, tubing, and fittings connecting a water main to an individual water meter or service connection.

As a minimum, isolation valves shall be installed on all new water mains within the distribution system as follows: (a) No farther than 1,320 linear feet apart on all mains having a diameter of 12 inches or less. (b) At each tee or crossing connection between mains that have a di…

Prior to use, newly installed water mains, or water mains that have been taken out of service for maintenance or repair, shall be disinfected and sampled for bacteriological quality in accordance with American Water Works Association Standard C651-05, which is hereby incorporated…

(a) A DiPRRA shall develop an operations plan for each DPR project and submit the operations plan to the State Board with the permit application prepared pursuant to section 64669.15. (b) The DiPRRA shall operate the DPR project in accordance with an approved operations plan that…

(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 co…

“Direct filtration treatment” means a series of processes including coagulation, flocculation, and filtration but excluding sedimentation.

“Disinfection” means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.

“Disinfection profile” means a summary of Giardia lamblia or virus inactivation through the treatment plant.

“Plant intake” means the works or structures at the head of a conduit through which water is diverted from a source (e.g., river or lake) into the treatment plant.

“Pressure filter” means a pressurized vessel containing properly sized and graded granular media.

“Residual disinfectant concentration” means the concentration of the disinfectant in milligrams per liter (mg/l) in a representative sample of water.

“Sedimentation” means a process for removal of settleable solids before filtration by gravity or separation.

(a) Suppliers that propose to construct new filtration and disinfection treatment facilities or to modify or make additions to existing treatment facilities which require permit approval from the State Board pursuant to Health and Safety Code sections 116525 through 116550 shall …

(a) All treatment plants utilizing an approved surface water shall be operated by operators certified by the State Board in accordance with Health and Safety Code section 106885. (b) Filtration facilities shall be operated in accordance with the following requirements: (1) Conven…

(a) A supplier shall operate each treatment plant in accordance with an operations plan that has been approved by the State Board. With a permit application for a new treatment plant or modification to an existing treatment plant, the supplier shall submit for State Board review …

(a) A supplier shall maintain accurate and complete operation records for each treatment plant that treats an approved surface water. The records shall include but not be limited to the following: (1) The results of all monitoring conducted in accordance with sections 64654.8, 64…

A supplier shall notify the State Board as soon as possible, but no later than by the end of the next business day, or within 24 hours, whichever is less, by telephone or other equally rapid means whenever: (a) A combined filter effluent turbidity exceedance occurs pursuant to ta…

(a) Once a month, samples shall be collected at sampling locations representative of: (1) municipal wastewater that feeds the DPR project at a location after secondary wastewater treatment and prior to the treatment processes pursuant to section 64669.50, or at an alternate locat…

“Corrosion control treatment” or “CCT” means the corrosion control treatment that minimizes the lead and copper concentrations at users' taps without causing the water system to violate any primary drinking water standards.

“Detection limit for purposes of reporting” or “DLR” means the designated minimum level at or above which any analytical finding of a contaminant in drinking water resulting from monitoring required under this chapter shall be reported to the Department.

(a) The requirements in this section are applicable to all large water systems. (b) Each large system shall conduct standard tap sampling pursuant to section 64675 (General Requirements for Tap Sampling for Lead and Copper), and monitor for WQPs pursuant to section 64681 (Initial…

(a) The period of accreditation following the renewal of accreditation shall be twenty-four (24) months. (b) To renew accreditation, a laboratory shall: (1) Submit a Complete Application Package, in accordance with Section 64802.00, ninety (90) days prior to the expiration date o…

(a) When a certificate of accreditation is amended, the period of accreditation shall be the time remaining on the certificate of accreditation from the date it was amended. (b) To amend accreditation, a laboratory shall: (1) Submit an amendment application package; (2) Pay the r…

(a) A laboratory may apply for accreditation as a main laboratory, in accordance with Section 64808.00, if the laboratory is: (1) Designated as the primary location; and (2) A fixed, permanent facility, which may include fixed-in-place vehicles.

(a) The provisions of this Chapter shall apply to all public pools and public pool sites, including, but not limited to: (1) Amusement park pools. (2) Apartment house pools. (3) Bed and breakfast inn pools. (4) Campground pools. (5) Club pools. (6) Commercial pools. (7) Condomini…

Except after seasonal closures, the enforcing agent shall give written approval before a public pool may be placed in operation.

(a) No public pool employee having a communicable disease while in an infectious state shall work in any capacity involving contact with pool users, pool water, or the operation of the pool equipment and ancillary facilities at a public pool unless a current written statement is …

(a) All medical waste treatment facility or transfer station permit applications, and applications for permit revisions, modifications, and amendments shall be accompanied by the following: (1) Information necessary to enable the enforcement agency to comply with the requirements…