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Earlier editions: 2026-09

Title B — REGULATIONS›Division B11 — ENVIRONMENTAL HEALTH›Chapter IV — ONSITE WASTEWATER TREATMENT

Santa Clara County Municipal Code Art. 2 Onsite Wastewater Treatment Systems

Santa Clara County Municipal Code · 2026-10 edition · updated 2026-10-04 · Santa Clara County

Cite as: Santa Clara County Municipal Code Article 2 · Text as of 2026-10-04

Sec. B11-65. - Onsite wastewater treatment systems; when used.

(a) Every residence, place of business, or other building, or place where persons congregate, reside, or are employed, and which cannot be connected to a sanitary sewer, must be provided with a water flush toilet connected to an approved OWTS.

(b) Every building, structure, or appurtenance that contains one or more waste producing fixtures such as toilets, sinks, showers or bathtubs, clothes washing machines, dish washing machines, animal wash pads, floor drains or other fixture or fittings intended to drain organic or inorganic waste material must be connected to an approved OWTS that meets the requirements of this chapter.

(c) Subject to local zoning restrictions and planning approval, multiple buildings on the same parcel, such as a main house and detached living unit or two or more agricultural housing units, may be served by a common OWTS located on that parcel, provided the OWTS is determined to have sufficient treatment and dispersal capacity for the expected wastewater flow from all buildings or facilities connected to the OWTS.

(Ord. No. NS-517.85, § 3, 11-26-13)

Exceptions & meaning →

Sec. B11-66. - Onsite wastewater treatment systems subject to California Regional Water…

Review and approval by the applicable California Regional Water Quality Control Board is required for OWTS in cases where: (a) the peak wastewater flow handled by the OWTS is more than 10,000 gallons per day; (b) the OWTS is a categorized as a community system, which serves multiple discharges under separate ownership; or (c) the California Regional Water Quality Control Board has otherwise determined that their review and approval is necessary and appropriate for water quality protection.

OWTS that are subject to the requirements and approval of the California Regional Water Quality Control Board are also required to obtain approval of the Director in accordance with the following:

(a) The proposed system must be designed to accommodate the waste discharge consistent with the requirements of the appropriate California Regional Water Quality Control Board.

(b) The Director will require engineered sewerage plans to be submitted by a registered civil engineer or a registered environmental health specialist with experience in OWTS design before issuing a permit.

(c) A registered civil engineer, professional geologist, or a registered environmental health specialist will be required to inspect the construction of the OWTS and, upon completion, to submit a letter of certification to the Director verifying the proper installation and operation of the OWTS.

(d) Site evaluations, plan submittals, design and construction details, inspection, and operation and maintenance shall be consistent with guidelines and procedures prescribed by the Director and contained in the Onsite Systems Manual.

(e) The applicant must obtain a permit(s) from the Director and pay a permit fee(s) in an amount established by resolution of the Board of Supervisors.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 16, 10-21-25)

Sec. B11-67. - Onsite wastewater treatment system, conventional.

(a) Where an OWTS is required, it shall, at a minimum, consist of a septic tank and subsurface dispersal system for absorption and leaching of the effluent into the soil. The septic tank and subsurface effluent dispersal system must be so constructed as to meet the requirements prescribed by this Chapter and the rules, regulations, and guidelines contained in the Onsite Systems Manual.

(b) OWTS must be installed in accordance with the plans approved by the Director. Any changes in the installation plans must be reviewed and approved by the Director prior to installation.

(c) No person may construct, add to, repair, or alter any existing OWTS without first submitting plans to the Director for approval and obtaining a permit pursuant to the requirements of this Chapter.

(d) Two dispersal fields (dual leaching), each 100 percent of the total size required by the Director, must be installed and interconnected with an approved flow diversion device, intended to allow alternate use of the two fields.

(e) OWTS must be located to be easily accessible for maintenance and repairs.

(f) For all locations where an OWTS is proposed to be installed, soil profiles, percolation tests, and other exploratory tests, as necessary, shall be performed to verify adequate depth and permeability of soil and separation between trench bottom and groundwater. Testing shall be conducted in accordance with requirements and guidelines prescribed by the Director in the Onsite Systems Manual. Such procedures shall include provisions for completion of groundwater observations during the wet season, as well as wet season percolation testing in cases where soils exhibit high shrink-swell characteristics related to clay content, plasticity, and/or structure. Where the Director has been provided adequate evidence to demonstrate suitable soil conditions and groundwater separation, testing requirements may be waived.

(g) For new divisions of land, soil profiles, percolation tests and groundwater determinations will be required on every parcel unless the Director determines, on a case-by-case basis, that such testing is not necessary due to the availability of sufficient information to demonstrate conformance with applicable siting criteria for all proposed OWTS locations.

(h) When a geological report is required by the county geologist, it must be made available to the Director.

(i) Approval of any conventional OWTS shall require compliance with the following minimum siting criteria:

(1) Soil depth. Minimum depth of permeable soil beneath the bottom of the proposed dispersal field shall be five feet. Permeable soil is defined as having a percolation rate of 120 minutes per inch or faster or having a clay content of less than 60 percent, and shall not include rock formations that contain continuous channels, cracks, or fractures.

(2) Soil fill. Maximum depth of soil fill covering any portion of the area proposed for installation of a dispersal system shall not exceed 12 inches in depth.

(3) Vertical groundwater separation. Minimum required vertical separation distance between trench bottom and groundwater shall be determined according to the soil percolation rate as follows:

Percolation Rate (Minutes/Inch) Vertical Distance (Feet)
Less than 1 Not Permitted
1—5 20
6—30 8
31—120 5
More than 120 Not Permitted

(4) Areas of flooding. OWTS shall not be located in areas subject to flooding as defined by the limits of the ten-year floodplain, determined or estimated from published floodplain maps or on the basis of historical evidence acceptable to the Director. New OWTS that are to be located in areas of special flood hazard, as identified in Division C12 of this Ordinance Code, must comply with all relevant provisions of Division C12 of this Ordinance Code.

(5) Ground slope. Maximum ground slope in the dispersal field area shall not exceed 30 percent. Additionally, for any site where the ground slope exceeds 20 percent, approval shall be dependent upon completion of a geotechnical report as provided in Section B11-83 of this Chapter.

(6) Horizontal setbacks. Minimum horizontal setback distances from various site features to OWTS components shall be as follows:

Site Feature Minimum Setback Distance (feet) Minimum Setback Distance (feet)
To Dispersal Field To Septic Tank
All wells and springs 100 100
Public water supply wells 150 150
Watercourses Watercourses Watercourses
• General (from top of bank) 100 100
• Between 1,200 to 2,500 feet from a public water system intake 1 200 100
• Within 1,200 feet from a public water system intake 1 400 100
Reservoirs (from high water mark) Reservoirs (from high water mark) Reservoirs (from high water mark)
• General 200 200
• Within 1,200 feet from a public water supply intake 1 400 200
Cuts or steep embankments (from top of cut) 4 X h 2,3 10 feet
Steep slopes (from break of slope) 4 4 X h 2,3 10 feet
Unstable land mass 100 3 100 3
Drainageway/drainage swale (from edge of flow path) 50 50
Foundation 10 5
Property line 10 10
Septic tanks 6 N/A
Swimming pool 25 25
Road easement, pavement, or driveway 5 5

1 For areas tributary to and upstream of water supply intake; setback distance measured from high water mark. Exceptions allowed per SWRCB OWTS Policy, as follows: (a) for replacement OWTS, comply to the maximum extent practicable and incorporate supplemental treatment unless Director finds no impact or significant threat to water source; (b) for new OWTS on pre-existing lot of record (pre-May 13, 2013), comply to maximum extent practicable and incorporate supplemental treatment for pathogens per sections 10.8 and 10.10 of SWRCB OWTS Policy as detailed in the Onsite Systems Manual.

2 h equals the height of cut or embankment, in feet. The required setback distance shall not be less than 25 feet nor more than 100 feet.

3 Setback distance may be reduced in accordance with recommendations provided in a geotechnical report prepared by a civil engineer or professional geologist consistent with section B11-83 and guidelines contained in the Onsite Systems Manual.

4 Steep slope is considered to be land with a slope of > 50% and distinctly steeper (at least 20% steeper) than the slope of the adjacent tank or dispersal field area.

_____

(7) Soil percolation rate. The average soil percolation rate in the proposed dispersal field area shall not be faster than one minute per inch (mpi) nor slower than 120 minutes per inch (mpi), determined in accordance with procedures prescribed by the Director in the Onsite Systems Manual.

(8) OWTS located on property served. OWTS shall be located on the same property as the building(s) being served.

(j) Upon notice from the Director that work on the OWTS is being conducted in violation of this Chapter, or in an unsafe or dangerous manner, the work must stop immediately. The stop-work order must be in writing and must be issued to the owner of the property involved by first class U.S. mail. A copy must also be supplied to the owner's agent, or to the person doing the work. It must state the conditions under which work may be resumed.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 17, 10-21-25)

Exceptions & meaning →

Sec. B11-68. - Plans.

The OWTS plans must comply with and contain all information as prescribed by the Director in the Onsite Systems Manual. Any change in the OWTS plans after the issuance of a permit must first be approved by the Director. Failure to obtain approval from the Director will invalidate the permit.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 18, 10-21-25)

Exceptions & meaning →

Sec. B11-69. - Fees.

Permit fees for OWTS subject to this chapter and all related fees will be an amount established by resolution of the Board of Supervisors.

(Ord. No. NS-517.85, § 3, 11-26-13)

Exceptions & meaning →

Sec. B11-70. - State contractor's license required for installation or repair;…

(a) No person may install, construct, alter, enlarge, reconstruct, replace, improve, recondition or repair an OWTS pursuant to this chapter unless: The person possesses a general engineering contractor's license (class A) as defined in section 7056 of the Business and Professions Code, or a Class C-42 sanitation system contractor's license or Class C-36 plumbing contractor's license from the Contractors State License Board of the State of California.

(b) In the case of a conventional OWTS, the property owner may construct or repair an OWTS on his/her own property, which system serves or will serve the building on the property that is neither being offered for sale nor intended to be so offered, provided:

(1) Persons hired by the owner to do the subject work must comply with section B11-70(a); or

(2) Persons hired by the owner must be hired as employees of the owner and the owner must provide workman's compensation insurance, as required by law; and

(3) An OWTS permit is obtained.

(Ord. No. NS-517.85, § 3, 11-26-13)

Exceptions & meaning →

Sec. B11-71. - Refusal to issue building permit.

No building permit may be issued for any building requiring a sewage disposal system that is not to be connected to an approved sanitary sewer unless the applicant has received written approval of the Director for an OWTS.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 19, 10-21-25)

Exceptions & meaning →

Sec. B11-72. - Refusal to issue certification of occupancy.

(a) No certification of occupancy may be issued for any building that is not connected to an approved sanitary sewer without written approval of the Director for an OWTS.

(b) No person may occupy or otherwise use any premises or building that has not been connected to an approved sanitary sewer unless the Director has approved the method of sewage disposal.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 20, 10-21-25)

Exceptions & meaning →

Sec. B11-73. - Onsite Systems Manual.

(a) Policy, procedural and technical details for implementation of this Chapter shall be contained in a document titled the Onsite Systems Manual.

(b) The Onsite Systems Manual shall be developed and maintained by the Environmental Health branch of the Public Health Department and shall provide a reasonable process for seeking input from the affected public and OWTS practitioners in connection with its development and when changes are made.

(c) The Onsite Systems Manual and any amendments shall be subject to approval by the Director and by the San Francisco Bay and Central Coast Regional Water Quality Control Boards in accordance with applicable State requirements and policies for onsite wastewater treatment.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 21, 10-21-25)

Exceptions & meaning →

Sec. B11-74. - Cumulative impacts.

Where OWTS may have cumulative impacts on groundwater and/or watershed conditions due to such factors as the constituent levels (e.g., nitrogen content) in the wastewater, the volume of wastewater flow, the density of OWTS discharges in a given area, and/or the sensitivity and beneficial uses of water resources in the discharge area, the Director may require additional technical studies (also termed "cumulative impact studies") or other information demonstrating to the satisfaction of the Director, that use of the proposed OWTS will not create adverse cumulative effects on water quality, public health, or safety. Cumulative impact studies shall be mandatory for any OWTS with wastewater flows of 2,500 gpd or more. In all cases, such cumulative impact studies will be conducted in accordance with the Onsite Systems Manual. The Onsite Systems Manual guidelines will cover items including, but not limited to, the following:

(1) Circumstances requiring cumulative impact assessment;

(2) Minimum qualifications of individuals performing the work;

(3) Data needs and assumptions;

(4) Analytical methods and calculations;

(5) Evaluation methods and criteria; and

(6) Provision for inclusion of specific requirements or recommendations of the California Regional Water Quality Control Board having jurisdiction.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 22, 10-21-25)

Exceptions & meaning →

Sec. B11-75. - Sewer wells; cesspools; seepage pits.

All sewer wells, cesspools, seepage pits, and similar excavations are hereby declared a public nuisance and are prohibited.

(Ord. No. NS-517.85, § 3, 11-26-13)

Exceptions & meaning →

Sec. B11-76. - Holding tanks; portable toilets.

(a) All holding tanks are hereby declared a public nuisance and are prohibited. Exception to this prohibition may be granted by the Director:

(1) If it is necessary to use a holding tank to abate a nuisance or health hazard caused by a failing OWTS.

(2) For a publicly owned nonresidential facility necessary for the public health, safety, or welfare, where installation of an OWTS is not feasible and a holding tank is determined by the Director to provide the safest and most acceptable method of sewage disposal.

Where exceptions are granted and holding tank(s) approved, an operating permit issued by the Director will be required, which will provide for approval of the tank pumper, maintenance schedule, tank/sewage level monitoring, and reporting requirements.

(b) Portable toilets. Portable toilets are intended to serve nonresidential, limited use activities, such as field labor operations, special events, and temporary construction sites where connection to a sanitary sewer system or installation of an OWTS is not practicable. Excluding those activities covered under California labor and sanitation code requirements, the use of portable toilets at a particular location or event shall not exceed three consecutive days' duration unless otherwise exempted by the Director. Such exemption, where approved, may require the issuance of an operating permit in accordance with Section B11-92 of this Chapter, which will specify the terms and conditions for extended use of the portable toilet(s), including maintenance in accordance with requirements of Section B11-227.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 23, 10-21-25)

Exceptions & meaning →

Sec. B11-77. - Permit and onsite wastewater treatment system plans; new construction;…

No person may construct, build, rebuild, or remodel any residence, place of business, or other building or place where persons reside, congregate, or are employed which is not to be connected to an approved sanitary sewer without first submitting plans of the OWTS to the Director for approval and 1) obtaining approval of the proposed construction, building, rebuilding, or remodeling to be served by an existing OWTS, or 2) obtaining an OWTS installation permit pursuant to this Chapter. The approval or permit cannot be transferred and expires one year after the date of issuance; except that the Director, upon a showing of good cause, may extend the approval or permit for any time not to exceed one additional year. Failure to obtain an approval or permit from the Director is a violation of this Chapter.

The Director may revoke a permit or approval issued pursuant to this Chapter in case of any false statement, or misrepresentation of fact in the application or on the plans on which the permit or approval was based.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 24, 10-21-25)

Exceptions & meaning →

Secs. B11-78, B11-79. - Reserved.

Sec. B11-80. - Subsurface dispersal systems requirements, conventional OWTS.

(a) The conventional dispersal method approved for use in Santa Clara County shall be a gravity dispersal trench system, consisting of an 18- to 36-inch wide trench, no greater than eight feet deep, filled with gravel filter material and perforated distribution pipe, with the total length determined based on soil percolation rates and the projected wastewater flow rate of the building(s) being served. Trench system designs utilizing chambers or other filter material in place of gravel may be approved by the Director and addressed with specific criteria in the Onsite Systems Manual as a conventional dispersal system design option.

(b) Conventional OWTS shall be designed and constructed in accordance with requirements prescribed by the Director in the Onsite Systems Manual.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 25, 10-21-25)

Exceptions & meaning →

Sec. B11-81. - Construction inspections.

A stamped copy of the building plans for the approved OWTS must be kept available at the jobsite during system installation and until the system passes final inspection by the Director. Inspections of each new installation must be made to ensure compliance with all the requirements of this Code and the Onsite Systems Manual. Requests for inspection must be made at least one business day in advance of the commencement of work. In the event the Director determines there has been an improper installation, a stop-work order may be posted on the jobsite. Before any further work is done on a posted system, clearance from the Director must be obtained.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 26, 10-21-25)

Exceptions & meaning →

Sec. B11-82. - Operation and maintenance guidelines.

(a) Operation and maintenance guidelines for each OWTS installation shall be provided by the designer and/or the installer, with a copy provided to the Director as well as to the system owner.

(b) Final approval of system installation shall be contingent upon confirmation by the Director that required operation and maintenance guidelines have been provided.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 27, 10-21-25)

Exceptions & meaning →

Sec. B11-83. - Slope variances and erosion control.

(a) [Slope variances.] No subsurface dispersal system may be constructed on slopes exceeding 20 percent. Variances to this slope requirement may be granted by the Director where the applicant can demonstrate, through a geotechnical report and a complete engineering installation plan prepared by a California-registered civil engineer or a California-professional geologist who is certified as an engineering geologist or possesses comparable geotechnical expertise as determined by the County geologist, that use of a subsurface dispersal system will not permit sewage effluent to surface, degrade water quality, create a nuisance, affect soil stability, or present a threat to the public health or safety. The geotechnical report must include, but not be limited to, soil percolation rates, contours, soil depth, seasonal groundwater elevation(s), location of all existing or proposed ground cuts, rock formations, soil stability, drainage, and other data as determined by the Director and the County geologist.

(b) Pressure distribution and drip dispersal methods. In addition to the provisions of subsection (a) of this section, any OWTS proposed for construction on slopes exceeding 30 percent shall require the use of pressure distribution or drip dispersal methods, which are classified as an alternative OWTS and shall be designed and permitted in accordance with applicable provisions contained in Article 3 of this Chapter and in the Onsite Systems Manual.

(c) Erosion control. In addition to the provisions of subsections (a) and (b) of this Section, an erosion control plan shall be prepared and implemented for the following circumstances:

(1) Any alternative or conventional OWTS located on slopes exceeding 20 percent;

(2) Any alternative or conventional OWTS that includes the use of above-ground fill, regardless of the slope of the terrain;

(3) Any OWTS with a design capacity of greater than 1,000 gallons per day (gpd); and

(4) Any OWTS which is part of a development project requiring a grading and/or drainage permit per requirements of the County grading ordinance, Division C12, Chapter III of the County Code.

The erosion control plan shall incorporate measures consistent with guidelines and requirements contained in Division C12, Chapter III of the County Code, and shall be included as a part of the installation plan for the OWTS.

Final approval of the OWTS installation by the Director is contingent upon confirmation that the specified erosion control measures have been implemented.

In addition to the above requirements, the Director may require implementation of erosion control measures where, in their judgment, there is found to be a significant threat of sediment discharge to a drainageway or watercourse as a result of the manner in which the OWTS was installed.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 30, 10-21-25)

Exceptions & meaning →

Sec. B11-84. - Life extending construction.

(a) Major expansion and/or major intensification of use. Where construction associated with an existing structure will result in a major expansion of the structure resulting in greater than 500 cumulative square feet of all additions since March 2, 1982 or where the construction will result in a major intensification of the use of the property, (such as any increase in number of bedrooms for a residence or any increase in occupancy or wastewater flow for a commercial building), the OWTS must meet the minimum prevailing wastewater treatment and dispersal requirements of this Code.

(b) Minor expansion. Where construction associated with an existing structure will result in a minor expansion of the structure resulting in 500 cumulative square feet or less of all additions the Director shall require the following:

(1) Conduct an on-site inspection to determine adequacy and safe functioning of the existing OWTS in accordance with guidelines prescribed by the Director in the Onsite Systems Manual.

(2) Exposure and pumping of the existing septic tank except where the applicant can document that the tank has been pumped within the last three years; a receipt for service from a licensed septic tank pumping firm may be considered sufficient documentation.

(3) Determination of the location of existing dispersal trenches and identification of area where future dispersal system expansion may occur; the septic tank file will then be updated.

(4) Improvement and/or expansion of the existing OWTS when, in the judgment of the Director, the system is determined to be inadequate to accept current and/or projected waste flows. The determinations are to be made based on size and functioning of the current system, coupled with slope, soil, hydrological, and related factors. Where inspection results in a determination that the OWTS is failing or can reasonably be expected to fail or to contaminate surface waters or groundwaters, the Director will require the replacement or improvement of the sewage disposal system pursuant to section B11-65 of this Code.

Where improvement and/or expansion of the OWTS is required, but required repairs cannot be made, the Director will disallow the application.

(c) Remodeling or repair. Where the existing OWTS does not meet requirements of this Chapter, but is functioning safely and cannot be improved, construction will be limited to the remodeling or repair (as defined in the Uniform Building Code) of the existing structure provided:

(1) The construction will not constitute any expansion or intensification of the use of the property or structure.

(2) Construction will not result in conversion of uninhabitable area(s), such as a garage, deck, porch, patio, or similar area(s), to habitable area(s).

For purposes of implementing this Section, the term "intensification of use" means a change that may place an additional demand on the OWTS of a property. The magnitude of the intensification (major or minor) will be determined by the Director.

The restrictions in this Section also apply in the event of accidental or natural damage to a structure.

For purposes of implementing this Section, the terms "remodeling" and "repair" are as defined in the California Building Code (Chapter 15.05), which is adopted by reference into the County's building ordinance.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 29, 10-21-25)

Exceptions & meaning →

Sec. B11-85. - Abatement.

To the extent possible, failing OWTS must be brought into compliance with this Code. In case of any failure, malfunction, or breakdown of any OWTS, if not corrected within a time designated by the Director, the Director may order or cause corrections to be made and bill the property owner for the costs and may place a lien on the property for the abatement costs. The Director may also order the premises to be vacated if no safe manner of abatement is possible.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 30, 10-21-25)

Exceptions & meaning →

Sec. B11-86. - Abandoned onsite wastewater treatment systems.

Every OWTS that has been abandoned or has been discontinued from further use or to which no waste or waste discharge pipe from a plumbing fixture is connected must:

(a) Have the sewage removed from, and disposed of, in an approved manner.

(b) Have the tank top and bottom crushed, backfilled, and compacted with material approved by the Director or be removed and disposed of in an approved manner.

Completion of the above-described work shall require that the property owner obtain a septic tank abandonment permit from the Director as provided in the Onsite Systems Manual.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 31, 10-21-25)

Exceptions & meaning →

Sec. B11-87. - Notice of violation.

The Director may provide a notice of intent to record a notice of violation to the owner of property upon which a failing or substandard OWTS exists. Notice will be provided to the property owner by mail at the address shown on the latest assessment roll or at any other address of the owner known to the Director. The notice will also be posted on the property. The notice will state that within 15 days of the date of the notice, the property owner may request a meeting with the Director to present evidence that a violation does not exist.

If, within 15 days of the date of the notice, the property owner does not request a meeting and the violation has not been corrected, or if, after considering the evidence presented by the property owner at the meeting, the Director determines that a code violation in fact exists, the Director may record a notice of violation in the office of the County Recorder. Upon recording the notice, the Director will notify the owner of the action. The notice is to inform all parties that no improvements, including building additions, can be approved while the failing or substandard OWTS continues in operation.

At the request of any affected property owner and upon full payment of any fees established by resolution of the Board of Supervisors for recovery of associated enforcement costs and payment of any fee for the recordation of the notice of violation, the Director will issue a notice of expungement of violation upon proof to the Director that the noticed violation has been remedied. The notice of expungement may be recorded by the property owner at their expense.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 32, 10-21-25)

Exceptions & meaning →

Sec. B11-88. - Appeal from denial, revocation or suspension.

Any appeal to the decision of the Director pursuant to this Chapter must be made in writing to the Office of the County Hearing Officer, per Division A28 of Title A of the County of Santa Clara Ordinance Code, within 15 days after the decision is received by the applicant. A copy of the appeal must also be filed with the Director. The appeal must specifically describe the grounds upon which it is taken. The decision issued by the County Hearing Officer will be final.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 33, 10-21-25)

Exceptions & meaning →

Sec. B11-89. - Septic tank pumping, inspection, and reporting requirements.

(a) [Registered septic tank pumper required.] Whenever an onsite sewage disposal system is serviced for the purpose of septic tank pumping, it shall be performed by a registered septic tank pumper. The pumper shall maintain a valid registration and be in compliance with all regulatory requirements as set forth in Chapter X, Liquid Waste Pumpers of this Division. All registered pumpers must possess sufficient experience in the construction/operation of OWTS.

(b) Septic tank pumping. Whenever an OWTS is serviced for the purpose of septic tank pumping, the following shall occur:

(1) All compartments of the septic tank shall be pumped of all scum and sludge by a registered septic tank pumper.

(2) The septic tank shall be inspected for signs of damage, deterioration, corrosion, leakage, blockages, high liquid level, or other deficiencies.

(3) Any pumping systems that are part of the OWTS shall be tested for proper operation and inspected for any deficiencies in the pump/sump tank, pump unit, piping, valves, or control systems.

(4) The dispersal field shall be inspected for indications of system failure such as flooded trenches, soil saturation or surfacing sewage, backflow of water into the septic tank, down-slope seepage, erosion or drainage problems, or other deficiencies.

(c) Report required. A written report on form(s) provided by the Director shall be completed by the registered septic tank pumper and shall be submitted to the Department and the property owner no later than 30 days following septic tank pumping. The report shall include:

(1) The name of the property owner, the street address of the property where the OWTS is located, and the date of servicing.

(2) The name of the septic tank pumper, size of the septic tank(s), gallons pumped, the name and location of the disposal site, and a description of servicing activities.

(3) A description of any OWTS maintenance performed.

(4) A description of any failure or uncorrected deficiencies in the OWTS. Reported deficiencies shall include, but not be limited to: Deteriorated, corroded or damage septic tank components; deficiencies in the condition or operation of any pumping systems; dispersal field problems such as surface failure, flooded trenches, down-slope seepage, backflow of effluent from the dispersal field into the septic tank; existence of a cesspool; or other deficiencies.

(d) Notification to property owner. Upon being notified of a failure condition or other uncorrected deficiency in an OWTS, the Director will notify the owner in writing, by hand-delivery or first class U.S. mail, of the needed corrections required to comply with the applicable standards in this Chapter.

(e) Action by the property owner. Within 60 days of notice of such written notification, the property owner shall take all corrective actions necessary to comply with the applicable standards in this Chapter, unless otherwise approved by the Director.

(Ord. No. NS-517.85, § 3, 11-26-13; Ord. No. NS-300.1002, § 34, 10-21-25)

Exceptions & meaning →

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