Reliable Septic System Soil Testing and B100a Plans
Proper soil testing is the critical first step in septic design, determining how effectively your property handles wastewater. We provide the comprehensive testing and B100a plans required for home projects, additions, or failed system upgrades, ensuring fast regulatory permitting and long-term system reliability.
WHEN ARE THEY NEEDED?
HOME ADDITIONS & RENOVATIONS
Under CT Public Health Code B100a, any property expansion such as an additions, increased bedrooms, pool, deck, or outbuilding, requires a septic reserve area plan to verify that the intended change in use of the property does not negatively affect the ability to fit a code-complying septic in the future, once the proposed project is completed.
SYSTEM REPAIRS & FAILURES
If your current system is showing signs of failure, deep hole and perc testing are essential to design a code compliant replacement that protects your property.
A B100a plan is a required assessment in Connecticut for property owners with septic systems, ensuring that proposed additions, pools, accessory structures, and ADU's do not interfere with the ability to repair the existing septic or replace with a code-complying septic to meet the new design criteria . It requires soil testing, septic design, plot plans, and local health department approval to demonstrate that a future septic system can still be installed and meet all current health code requirements. All permits and plan submission will be coordinated by J.C. Nota Septic
The Process
1 SITE ASSESSMENT
We perform a comprehensive property analysis to map topographical features, existing infrastructure, and potential system constraints for B100a feasibility studies or new system designs.
From initial percolation tests to final health department approvals, we handle every technical detail to ensure your property is build-ready.
2 DEEP HOLE TESTING
A key step in the process where deep test holes are excavated to evaluate soil conditions, identify restrictive layers, and determine the presence of any seasonal high-water table, all of which are necessary to meet regulatory requirements.
3 PERCOLATION TESTING
Project Deliverables
We measure the rate at which water infiltrates the soil to determine the long-term hydraulic capacity of your property, which dictates the size and type of the septic leach field required.
4 SOIL ANALYSIS & DESIGN
Soil data collected from field tests is used to develop a design specific to your property. We ensure all plans meet state and local health codes and any property-specific requirements.
Common Questions
What exactly is a B100a plan?
A B100a plan is a regulatory review in Connecticut for properties with septic systems when planning additions, renovations, or accessory structures. It formally demonstrates that the proposed project won't compromise the existing septic system or the designated future reserve area.
When is soil testing required for my property?
Soil testing is mandated for all new home construction, for repairing or replacing failed septic systems, and often as part of the B100a review process. It measures the water absorption rate and defines the vertical separation between the ground surface and restrictive layers.
How long does the testing and design process typically take?
The field portion (excavation and perc testing) is usually completed in a single morning. Following the field visit, drafting the technical plans and health deparment approvals typically takes 2 to 3 weeks, though this varies based on site complexity and local health department timelines.
Can I request a B100a plan if I have already had soil testing performed?
Absolutely. Although we do perform soil testing we can certainly produce a plan off of recent soil testing results as long as the local health department approves.
Request Soil Testing & B100a Plans
Whether you're planning a pool, an addition, or repairing a failed system, our team provides fast and accurate site evaluations. Submit your project details below to request a service estimate and compliance timing.