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Septic Systems, or Onsite Wastewater Treatment Systems (OWTS), includes any system of piping, tanks, dispersal areas, alternative toilets or other facilities designed to function as a unit to convey, store, treat or disperse wastewater by means other than discharge into a public sewer system. 
Soil Evaluations
A Soil Evaluator determines the depth to the seasonal high water table, soil types and restrictive materials, such as ledge. Soil Evaluation testing can be conducted at any time throughout the year. Generally, this is the first step in the process of designing a Septic System/OWTS.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.
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Does not include application fees to accompany application to RIDEM.
Does not include backhoe or excavator.
Does not include any Septic System OWTS Designs.
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Designers Supervision
Once we have designed a Septic System OWTS for you and you then install the system, we will perform Designers Supervision and upon completion submit a Designers Certificate of Construction.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.
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Does not include Soil Evaluation Testing.
Does not include any Septic System OWTS design, re-design, or As-Built Plans.
Does not include application fees to accompany application to RIDEM.
Does not include backhoe, excavator, construction or installation.
Does not include Property Survey.
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New Construction Septic System OWTS Design
New Construction Septic Systems OWTS design include land that is undeveloped (un-sewered areas) and are not designs considered Repair Septic Systems OWTS or Alteration Septic Systems OWTS. Most typically, we would design a New Construction Septic System OWTS when:
- You build a new house.
- More than one bedroom is added to your existing home.
In addition to our designing a New Construction Septic System you will first need to have Soil Evaluation testing done, prior to any design, and Designers Supervision services when the New Construction Septic System is constructed and installed, which are not included.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.
More Details
Does not include Soil Evaluation Testing.
Does not include application fees to accompany application to RIDEM.
Does not include backhoe, excavator, construction or installation.
Does not include Variance applications.
Does not include Designers Supervision or Designers Certificate of Conformance.
Does not include Property Survey.
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Alteration Septic System OWTS Design
Alteration Septic System OWTS designs are for the alteration of existing sewage disposal systems. Alteration Septic System OWTS designs are appropriate whenever:
- Proposed change in the size of an existing Septic System OWTS.
- Modification of an existing Septic system OWTS.
- A building renovation or change of use of any structure discharging sewage into the Septic System.
A “change in size” of an existing Septic system means any physical alteration to your Septic System which will allow the system to accommodate:
- In the case of a residence, the additional sewage flow resulting from the addition of not more than one bedroom; or
- In all other cases, an increased flow of sewage in an amount less than or equal to twenty-five percent (25%) of the design flow.
Changes in size which will accommodate increased sewage flows resulting from more than one
bedroom or in an amount greater than twenty-five percent (25%) of the design flow (approved) must obtain a permit as a New Construction Septic Systems OWTS.In addition to our designing an Alteration Septic System you will first need to have Soil Evaluation testing done, prior to any design, and Designers Supervision services when the Alteration Septic System is constructed and installed, which are not included.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.
More Details
Does not include Soil Evaluation Testing.
Does not include application fees to accompany application to RIDEM.
Does not include backhoe, excavator, construction or installation.
Does not include Variance applications.
Does not include Designers Supervision or Designers Certificate of Conformance.
Does not include Property Survey.
Avg. Customer Rating: (8)
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Repair Septic System OWTS Design
Repair Septic System OWTS designs are for the repair of existing septic systems only. Repair Septic System OWTS designs do not propose:
- Any construction, building renovation, change of use of a structure.
- Any increase in the original design flow of the system.
- Does not authorize any building renovation of any structure
In addition to our designing a Repair Septic System you will first need to have Soil Evaluation testing done, prior to any design, and Designers Supervision services when the Repair Septic System is constructed and installed, which are not included.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.
More Details
Does not include Soil Evaluation Testing.
Does not include application fees to accompany application to RIDEM.
Does not include backhoe, excavator, construction or installation.
Does not include Variance applications.
Does not include Designers Supervision or Designers Certificate of Conformance.
Does not include Property Survey.
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Variance Septic System OWTS Design
A Variance Septic System OWTS design may be necessary if some of the rules and regulations set forth by the Rhode Island Department of Environment can’t be met.
There are too many reasons to list here for a Variance Septic System OWTS design, but the following list outlines a few of the most common reasons for needing a Variance Septic System OWTS design:- High water table.
- Shallow depth to impervious materials, such as ledge.
- Existing or proposed wells are too close to the Septic System OWTS. This is usually due to small sized lots and/or site constraints that limit separation.
- Existing or proposed Septic System OWTS are too close to environmental constraints such as; ponds, rivers and streams, wetland areas including swamps and marshes, or to surface drinking water supplies including tributaries that flow to them.
In addition to our designing a Variance Septic System you will first need to have Soil Evaluation testing done, prior to any design, and Designers Supervision services when the Variance Septic System is constructed and installed, which are not included.
You also may need to retain the services of a Class III Designer, and/or Professional Engineer, among other professionals, to complete this work. These services are not included and you are responsible for retaining such professionals, as necessary.
Valid only in Rhode Island, excluding New Shoreham (Block Island) and Prudence Island. Call for pricing for surveys on New Shoreham (Block Island) and Prudence Island.More Details
Does not include Soil Evaluation Testing.
Does not include Class III Designer, Professional Engineer, or any other professionals required to complete the Variance Septic System OWTS design and application.
Does not include application fees to accompany application to RIDEM.
Does not include backhoe, excavator, construction or installation.
Does not include Variance applications.
Does not include Designers Supervision or Designers Certificate of Conformance.
Does not include Property Survey.
Avg. Customer Rating: (4)
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