Program
Individual Sewage
Disposal System
(ISDS) Program
Darrell Siegrist
Manager
(805) 648-9248

Click here to email Betty Huff

Environmental Health
Division
800 South Victoria Ave.
Ventura, CA 93009-1730
(805) 654-2813
Fax: (805) 654-2480

Individual Sewage Disposal System (ISDS)

Forms and Documents

New ISDS
Certification of Existing ISDS - Set Back / Full Certification
ISDS Construction
General Forms and Documents
New ISDS
Application for New ISDS Construction
Certificate of Authorization
ISDS Construction Photos
Septic Tank Design Sizing Criteria
Bedroom Equivalents and Fixture Units
Bedroom Number Determination for Sizing ISDS
ISDS Setback Requirements
Disposal Field Setbacks from Slopes and Fill Material
Percolation Test Form
Hydrometer Analysis Test Form - For Seepage Pit Design
Seepage Pit Performance Data Worksheet
CSA-32 Easement Form - Required for Alternative Systems
Basal Subsurface Filter Bed
Subsurface Filter Bed with Disposal Pit
Certification of Existing ISDS

Which type of certification do you need?

Set Back Certification verifies that a proposed structure meets all required set back distances to the individual sewage disposal system (ISDS). A Set Back Certification is intended for projects that will NOT add plumbing fixture units or bedroom equivalents to the existing structure. Proposed project types include the following:

  • Accessory structure with no plumbing
  • Patio cover
  • Spa
  • Barn or garage with no plumbing
  • Pond
  • Sport court
  • Carport
  • Pool
  • Raised deck
  • Enlarging the footprint of a home
  • Pop-out bay window
  • Tennis court
Full Certification verifies that all set back AND capacity requirements of the individual sewage disposal system for a proposed structure are met. A full certification is intended for projects where any plumbing fixture units or bedroom equivalents are added to an existing structure.
Set Back Certification
Certification Application
Septic Tank Pumping Inspection Report
Full Certification
Certification Application
Material Required for Submittal of a Full Certification
Septic Tank Pumping Inspection Report
Bedroom Equivalents and Fixture Units Worksheet
ISDS Permits to Construct
Permit to Construct Application
Certificate of Compliance with Construction Safety Requirements
Onsite Wastewater Treatment Technical Manual
Construction Inspection Procedures
Certificate of Compliance with Construction Safety Requirements
Sample Repair Plot Plan
Drain Rock Requirements
Septic Tank/Cesspool/Brick-lined Seepage Pit Abandonment Procedures
Subsurface Filter Bed with Disposal Pit
Basal Subsurface Filter Bed
Septic Tank Sizing Criteria
Soil Identification Report
Example of ISDS Design Specification Sheet - Mound System
ISDS Setback Requirements
ISDS Construction Photos
Certificate of Authorization
Certificate of Compliance with Abandonment of OWTS
General Forms and Documents
Forms
ISDS Permit to Construct Application
Certificate of Compliance with Construction Safety Requirements
Subsurface Filter Bed with Disposal Pit
Basal Subsurface Filter Bed
Soil Identification Report
Authorization of Agent
Certificate of Compliance with Abandonment of ISDS
Notice to Property Owner
Documents
ISDS Construction Inspection Procedures
ISDS Sample Repair Plot Plan
ISDS Drain Rock Requirements
Septic Tank/Cesspool/Brick-lined Seepage Pit Abandonment Procedures
Septic Tank Sizing Criteria
Example of ISDS Design Specification Sheet - Mound System
ISDS Setback Requirements