§ 25B-8. Use of wells with water exceeding MCLs.

(a)

Public Water Well. A public water well regulated by either the state water resources control board, division of drinking water or Sonoma County Department of Health Services (DHS), Environmental Health and Safety (EHS) is exempt from this article.

(b)

Continued use of a contaminated well shall be subject to the following standards:

(1)

The contamination is caused by bacteriological compounds, organic compounds or inorganic compounds.

(2)

For well water intended for human or animal consumption, water treatment equipment or devices shall reduce the contaminant to a level below the maximum contaminant level (MCL) or if a MCL does not exist the treatment level shall be established with concurrence of the public health officer.

(3)

Water treatment equipment or devices shall be installed by a qualified contractor licensed to install water treatment devices (C61, C55, C36 and C57). The on-going service and maintenance of the treatment system shall be provided by an appropriately licensed contractor (C61, C55, C36, C57).

(4)

Treatment equipment backwash discharge shall be disposed of via an approved fixed air gap device into approved public sewer facilities. Where a public sewer connection is not available backwash discharge from the treatment unit shall be disposed into a dedicated dry well or a leach line.

(5)

The property owner shall have water quality analytical testing conducted in accordance with Table 25B-6 Frequency of Sampling. Testing shall be performed by a state certified laboratory and test results shall be submitted annually to the enforcing agency. The Percent Exceedance of MCL in Table 25B-6 applies to untreated well water relative to the California Primary MCL for any given constituent. The formula to determine the Percent Exceedance of MCL is presented as Equation (1).

Equation (1):	PE-MCL 1 = ((C 1 /MCL 1 )-1)*100
Where:	PE-MCL 1 is the Percent Exceedance of MCL for a given constituent C 1 is the untreated well water concentration for a given constituent MCL 1 is the State of California Primary MCL for a given constituent

 

Table 25B-6. Frequency of Sampling

Percent Exceedance of MCL	1% to 25%	26% to 50%	51% to 100%	101% to 1000%	>1000%
Sampling Frequency	Annually	Bi-Annually	Quarterly	Monthly	Daily

 

 

(6)

The water quality test results shall demonstrate that the concentration of contaminant(s) in the treated water is below maximum contaminant level(s) (MCL) or if a MCL does not exist the treatment level shall be established with concurrence of the public health officer.

(7)

The property owner shall keep records of all water quality test results for a period of three (3) years.

(8)

The requirement for treatment and ongoing testing of the water shall be subject to the North Bay Association of REALTORS® statutory disclosure forms signed and acknowledged by all parties. Property owners shall have the responsibility to notify all tenants.

( Ord. No. 6121, § III(Exh. A) , 7-28-2015)