Septic-Onsite Wastewater Information (Health Department)
General Supplemental Information For An Application Of An Onsite Wastewater System Permit
See Monterey County Code 15.20 (Septic Ordinance) for more specific information
License Requirement: Installation of a septic system requires either an A, C-42 or C-36 contractor’s license except that a B license is allowed to install a septic system in conjunction with a new construction project as appropriate under State Contractor’s law.
Plot Plan: Submit plot plan (1 inch = 40 feet or larger) showing property lines, location of proposed system and all appropriate horizontal set backs, from table “A” below.
Set Back Requirements:
Summary of Table A (15.20.070)
|
Minimum Horizontal Distance required from |
Septic Tank |
Disposal Field |
|
Building, Structure or Mobile Home |
5 FT |
10 FT |
|
Property Line, Domestic Water Lines, Large Trees |
10 FT |
10 FT |
|
Domestic Water Supplies * and all Wells |
100 FT |
100 FT |
|
Bodies of Water*; Watercourse; Springs |
100 FT |
100 FT |
|
Reservoir Spillway Elevation |
100 FT |
200 FT |
|
In ground swimming pools and spas Downhill embankment (Man made or Natural) |
25 FT * |
25 50 FT |
|
Curtain drains * Up slope |
20FT |
20 FT |
|
* Down slope |
50FT |
50 FT |
Minimum Vertical distance from groundwater
Measured from bottom of disposal field 10 FT 10 FT
Note: Seepage Pits Require A Minimum 150 Foot Set Back From A Water Well
* Those items marked with an asterisk have further comments found in Monterey County Code 15.20
Miscellaneous requirements:
- Installation of a leach field either in or within 50 feet of 30% or greater slopes requires prior review and approval by both County Health and State Regional Water Quality Control Board.
- Septic systems must be located on same parcel as buildings served by system and cannot be located in or extend into easements.
- Multiple leach fields require a minimum separation distance of 8 feet or twice the effective depth whichever is greater.
- Drain rock must be clean washed 1&1/2 to 2&1/2 inch in diameter. Also, clean ¾ inch rock, uniform in size is allowed.
- A 2-way clean out extending to grade is required two feet from the septic tank inlet. An approved effluent filter must be installed in the tank outlet.
1/7/03