Skip to main content

The type of protection required is related to the degree of hazard that exists on the property served. The type of protective device that may be required (listed in increasing level of protection) includes double check valve (DC), double check detector check assembly (DCDA), reduced pressure principle backflow prevention device (RP) and an air gap separation (AG). The customer may choose a higher level of protection than required by the district. The minimum types required to protect the district’s water system are given in Table 3.05-1 and are in accordance with Cal. Code Regs. tit. 17. Situations not covered in Table 3.05-1 shall be evaluated on a case-by-case basis and the appropriate cross connection protection device shall be determined by the district and/or public health agency.

Table 3.05-1. Minimum Degree of Protection Required

Description

Minimum Type of Protective Device

1. Sewage and Hazardous Substances

a. Property where there are wastewater pumping and/or treatment plants and there is no interconnection with the potable water system.

AG

b. Property where hazardous substances are handled in any manner in which the substance may enter the public water system.

AG

c. Property where there are irrigation systems into which fertilizers, herbicides or pesticides are, or can be, injected.

RP

d. Property where there is a separate meter for the landscape irrigation system.

RP

e. Property where the connection from the public water system supplies water to a swimming pool only.

DC

2. Auxiliary Water Supplies

a. Property where there is an approved or unapproved auxiliary water supply which is interconnected with the public water system.

RP

b. Property where there is an unapproved auxiliary reduced pressure water supply and there is no interconnection with the public water system.

DC

3. Recycled Water

a. Property where recycled water is used, other than in an approved dual plumbed area, and there is no interconnection with the potable water system.

RP

4. Fire Protection Systems

a. Property where the fire system is directly supplied from the public water system and there is an unapproved auxiliary water supply on or to the property (not interconnected).

DC or DCDA

b. Property where the fire system is supplied water from the public water system and interconnected with an unapproved auxiliary water supply.

AG

c. Property where the fire system is supplied from the public water system and where either elevated storage tanks or fire pumps which take suction from a private reservoir or storage tank are used.

DC or DCDA

d. Property where the fire system is supplied from the public water system and where recycled water is used in a separate piping system within the same building.

DC or DCDA

5. Salton Sea Facilities

a. Pier hydrants for supplying water to vessels for any purpose.

RP

b. Property where there are marine facilities.

RP

6. Commercial and Industrial Facilities

a. Beverage bottling plants.

RP

b. Canneries, packing houses and reduction plants.

RP

c. Dairies and cold storage facilities.

RP

d. Film laboratories.

RP

e. Sand and gravel plants.

RP

7. Property or Facilities

a. Car washes.

RP

b. Campgrounds.

RP

c. Guardhouses, restrooms/comfort stations.

DC

d. Laundries (including self-service), dye works, dry cleaners.

RP

e. Pharmacies.

RP

f. Restaurants.

RP

g. Schools and colleges.

RP

h. Restricted access facilities (government buildings).

RP

i. Trailer and mobile home parks with a master meter.

DC

j. Premises with a cooling tower.

RP

8. Oil and Gas Facilities

a. Property used for oil and gas production and transmission.

RP

b. Gas stations.

RP

c. Vehicular service stations.

RP

9. Health Facilities

a. Hospitals and medical buildings and clinics.

RP

b. Sanitariums, nursing and convalescent homes.

RP

c. Morgues and autopsy facilities.

RP

10. Elevated Facilities

a. Property with a building located over 46 feet above the street level.

TBD

(Ord. 1399.12 § 11-2, 2017)

Loading…