This property is served by an official Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Packaged Treatment Plant, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS onsite septic system registered under Permit #OWTS-097-110-003 with the Sonoma County health department.
The permitted system is engineered for 3 bedrooms with an approved 1,000-gallon tank capacity.
System details
System typeStandard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Packaged Treatment Plant, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS
Permit statusActive / Approved
Tank capacity1,000 Gallons
Approved bedrooms3 Bedrooms
Design daily flow360 gal/day (CA Health Code)
Tax Parcel ID097-110-003
Soil ClassificationPermit Sonoma Soil Survey
Supervising AgencyPermit Sonoma - Well & Septic Division
Public Record Notice & Schematic Blueprint Disclaimer:
This technical drawing is an illustrative layout model depicting typical Sonoma County (California) setback geometry (house, 100-ft well buffer, 10-ft property boundary clearances) for a 3-bedroom / 1,000-gal system. It is NOT the surveyed blueprint of this specific property. Exact physical triangulation distances from house corners are preserved in the original hand-drafted inspection file (Permit #OWTS-097-110-003) on file with Permit Sonoma - Well & Septic Division.
Official Permit #OWTS-097-110-003 on fileVerified compliant with California residential health code
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📍 20601 Bohemian Ave, Sonoma County, CAResolving parcel coordinates...
Sanitary Setback Standard: Under California environmental health code, all septic absorption drainfields must observe a minimum horizontal separation of 100 feet from any private drinking water well heads and 10 feet from property boundaries.
Quick Field Tank Locator
Sonoma County • CA Field Standard
Use this quick 4-step checklist to pinpoint your underground tank lids in the yard before routine pumping or inspection.
1
Trace Foundation Sewer Exit Line
Locate the 3-inch or 4-inch main DWV waste pipe exiting the basement, crawlspace, or bathroom exterior foundation.
Under gravity standards, the tank inlet lies along a straight line projected perpendicular from this foundation exit point.
2
Spot 4-Inch Cleanout & Setback Vector
Look for a threaded 4" PVC cleanout cap 3 to 5 feet outside the house foundation wall.
Setback (California Onsite Wastewater Regulations): Requires minimum 8-ft foundation clearance. Installers typically set the tank 10 to 20 feet away along this cleanout axis.
3
Check Turf Outline & Estimated Footprint
For this 1,000-gallon tank, expect an underground footprint of approx. 5 × 8 ft at 12–36 inches depth.
Summer / Dry Spell: Grass directly over shallow tank lids dries and yellows faster than surrounding lawn.
Winter / Frost: Bacterial warmth (50°–60°F) inside the tank melts snow and morning frost premature to the yard.
4
Non-Destructive Soil Probing Feedback
Using a blunt-tip steel T-handle probe, insert every 12 to 18 inches starting 10 ft out from your cleanout.
Lid Contact: Unyielding solid "thud" across a continuous approx. 5 × 8 ft horizontal span.
Rock vs. Root: Rock produces sharp scratch deflection; tree roots yield with a spring-back bounce.
Compliant with California Onsite Wastewater Regulations (8-ft foundation setback)Never drive vehicles or heavy equipment over the tank or drainfield corridor
Need in-depth field guidance or electronic locating?
Read our complete technical guide on flushable radio transmitters (sondes), as-built triangulation, and modern surface riser retrofits.
Under California Government Code § 4216 (USA North 811 / DigAlert): Always call 811 two full business days before inserting steel probes or excavating. Private septic lines are not marked by 811, but public utility clearance is legally mandatory.
Pumping & maintenance guidance
EPA Pumping Frequency & Maintenance Calculator
EPA Standard (Pub. 832-F-12-001)
✓ Verified on Permit #OWTS-097-110-003
4 People
Estimated from 3-bedroom permit
Receipt kept by owner / contractor
EPA Recommended Service Interval
Every 3 to 4 Years
Service Status
Select Year to Check Status
EPA Regulatory Requirement (The 1/3 Rule): Regardless of calendar years, a septic tank must be pumped whenever the floating scum layer comes within 6 inches of the outlet baffle or accumulated bottom sludge exceeds 30% to 33% of the liquid depth. Standard gravity systems require professional inspection every 1 to 3 years.
Under California State Water Resources Control Board OWTS Policy, routine septic tank cleanouts are performed by privately contracted, state-licensed septic tank contractors. Routine pump-out receipts are maintained by the property owner and the service company. For a 1,000-gallon tank supporting a 3-bedroom residence, state environmental health guidelines recommend the following pumping intervals:
Household OccupancyRecommended Interval
1 to 2 occupantsLight household water usage
Every 4 – 5 years
3 to 4 occupantsStandard residential usage
Every 3 – 4 years
5+ occupantsHeavy usage or garbage disposal equipped
Every 2 – 3 years
💡 Inspection Tip: Never allow heavy equipment or vehicles to drive over your 1,000-gallon tank or drainfield absorption area.
Property Septic Disclosure & Escrow Summary
Standard Real Estate Closing & Due Diligence Form (Form PSD-2026)
OFFICIAL SANITARY PUBLIC RECORD COMPILATION
PROPERTY SEPTIC DISCLOSURE & ESCROW SUMMARY
Prepared for Real Estate Due Diligence, Title Transfer, Escrow Closing & Home Inspection
Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Packaged Treatment Plant, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS, Standard OWTS
Tank Capacity:
1,000 Gallons (Approved)
Approved Bedroom Sizing:
3 Bedrooms Maximum
Design Daily Flow:
360 Gal/Day (CA Health Code)
Soil / Percolation Series:
Permit Sonoma Soil Survey
Licensed Installer on File:
Licensed C-42 Sanitation Contractor
Environmental Inspector:
Permit Sonoma Environmental Specialist
3. STATUTORY SETBACK REQUIREMENTS (CA SANITARY CODE)
100 FTDrinking Water Well
10 FTProperty Boundary
8 FTBuilding Foundation
100 FTSurface Water / Stream
Notice: Siting and setback distances must be maintained free of permanent structures, driveways, patios, or swimming pool construction.
4. AS-BUILT DRAWING & PUBLIC RECORDS AUDIT
✓ Official Digital As-Built Drawing On File
A verified technical as-built plot plan is attached to this record in the environmental health repository. The drawing details the precise location of the septic tank, inlet/outlet baffles, header pipe, and subsurface absorption drainfield lines.
5. EPA PUMPING GUIDANCE & LOCAL MAINTENANCE COSTS (PUB. 832-F-12-001)
U.S. EPA Service Interval Standard
• Cleanout Frequency: Every 3 to 5 years for standard gravity systems.
• The 1/3 Rule: Tank must be pumped whenever accumulated bottom sludge and floating scum exceed 30% to 33% of liquid depth, regardless of calendar years.
• Routine Inspection: Annual to triennial professional inspection recommended.
Typical Sonoma Contractor Rates
• Routine Pump-Out:$450 – $850 (average 1,000 gal).
• Full Replacement Cost: $12,000 – $28,000.
• Receipt Retention: Receipts must be retained by property owner.
6. ESCROW & TITLE DUE DILIGENCE CHECKLIST (BUYER / SELLER AUDIT)
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1. Maintenance Log & Pumping Receipts: Seller to provide verified receipts from licensed septic service company covering past 3 to 5 years.
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2. Professional Pre-Closing Inspection: Buyer advised to commission independent inspection (hydraulic dye test, tank baffle inspection, and drainfield camera scope).
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3. Bedroom Capacity Verification: Verify residence does not contain unpermitted bedrooms exceeding the approved 3-bedroom limit (excess occupants cause premature drainfield saturation).
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4. Surface Clearances & Risers: Verify tank access lids and effluent filter risers are secured to grade, undamaged, and clear of soil obstruction.