California Code of Regulations › Title 23 - Waters › Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards › Chapter 3.5 - Urban Water Use Efficiency and Conservation › Article 1 - Water Loss Performance Standards for Urban Retail Water Suppliers › Section 980 - Definitions

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
As used in this Article:
(a) "Active leak detection" means a leak
				  control strategy utilizing the appropriate combination of leak detection
				  surveys and continuous monitoring of flows to proactively detect and locate
				  leaks in water distribution systems owned or operated by urban retail water
				  suppliers.
(b) "Annual audit" means
				  the validated annual water loss audit submitted by an urban retail water
				  supplier pursuant to Water Code 10608.34, subdivision (b).
(c) "Annual background leakage" means the
				  estimated fraction of real loss that is not detected by active leak detection
				  in a distribution system, in acre-feet per year. The default value shall be the
				  value calculated in accordance with section
				  982, subdivision (a)(1).
(d) "Annual reported leakage" means the total
				  volume of real loss occurring due to reported leaks on mains and reported leaks
				  in lateral and service lines, in acre-feet per year. Reported leakage is a
				  component of real loss. The default value shall be the value calculated in
				  accordance with section
				  982, subdivision (a)(2).
(e) "Annual unreported leakage" means the
				  average baseline real loss that remains after deducting the annual reported
				  leakage and the annual background leakage from the average baseline real loss,
				  in acre-feet per year. Unreported leakage is a component of real loss. The
				  default value shall be the value calculated in accordance with section
				  982, subdivision (a)(3).
(f) "Apparent losses" mean losses in customer
				  consumption attributed to inaccuracies associated with customer metering,
				  systematic data handling errors, plus unauthorized consumption (theft or
				  illegal use of water), as reported in the annual audit as "apparent
				  losses."
(g) "Appurtenances" are
				  valves (for example, isolation, automatic control, and air), fire hydrants,
				  meters, and any other asset associated with the water distribution and
				  transmission network that are additional to the pipe assets themselves. Leaks
				  on appurtenances may be accounted for in the "mains" or "laterals and service
				  lines" categories, as long as the accounting stays consistent.
(h) "Average annual rise in price of water"
				  means the average expected increase in water price in real (inflation-adjusted)
				  terms, expressed as a percent. Unless a supplier uses its own value in
				  accordance with section
				  984(b)(1), the
				  default value shall be 4.2 percent.
(i) "Average baseline apparent loss" means
				  the average of the apparent losses reported in the annual audits submitted for
				  the baseline period.
(j) "Average
				  baseline real loss" means the average of the real losses reported in the annual
				  audits submitted for the baseline period. If the real loss submitted for any
				  year is a negative value, that value will be replaced by zero for purposes of
				  averaging the baseline real loss.
(k) "Average duration between reporting and
				  repair of reported leaks on laterals and service lines" means the average
				  duration between the time when the urban retail water supplier becomes aware of
				  a leak occurring on lateral and service lines and the time when it repairs the
				  leak, in days, rounded to the closest whole number. Unless a supplier uses its
				  own values as indicated in this article, the default value shall be 8
				  days.
(l) "Average duration between
				  reporting and repair of reported leaks on mains" means the average duration
				  between the time when the urban retail water supplier becomes aware of a leak
				  occurring on mains and the time when it repairs the leak, in days, rounded to
				  the closest whole number. Unless a supplier uses its own values as indicated in
				  this article, the default value shall be 3 days.
(m) "Average flow rate for reported leaks on
				  laterals and service lines" means the average real loss from reported leaks
				  occurring on lateral or service lines, in gallons per minute per leak. Unless a
				  supplier uses its own values as indicated in this article, the default value
				  shall be 7 gallons per minute per leak.
(n) "Average flow rate for reported leaks on
				  mains" means the average real loss from reported leaks occurring on mains, in
				  gallons per minute per leak. Unless a supplier uses its own values as indicated
				  in this article, the default value shall be 50 gallons per minute per
				  leak.
(o) "Average leak detection
				  survey frequency" is the average rate at which a supplier conducts active leak
				  detection on a length of pipeline, in miles per month. Unless a supplier uses
				  its own values as indicated in this article, the default values shall be as
				  follows:
(1) For urban retail water suppliers
				  with average length of mains less than 500 miles, average length of mains, in
				  miles, divided by 24 months;
(2)
				  For urban retail water suppliers with average length of mains equal to or more
				  than 500 miles, but less than 1,000 miles, average length of mains, in miles,
				  divided by 30 months;
(3) For urban
				  retail water suppliers with average length of mains equal to or more than 1,000
				  miles, but less than 4,000 miles, average length of mains, in miles, divided by
				  36 months; and
(4) For urban retail
				  water suppliers with average length of mains equal to or more than 4,000 miles,
				  but less than 6,000 miles, 114 miles per month.
(5) For urban retail water suppliers with
				  average length of mains equal to or more than 6,000 miles, 130 miles per
				  month.