massachusetts public health inspector training wastewater
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MA PHIT- Wastewater Certificate Program
Session 5 1
Massachusetts Public Health Inspector TrainingWastewater Certificate Program
(MA PHIT WW)
Session 5:Design and Plan Review—Non-Conventional Systems
Learning Objectives
After completing this session, you will be able to: Describe situations that require non-conventional
solutions
Explain non-conventional solutions and the required approval process for each
List and define the innovative/alternative (I/A) technology classifications
Describe certain I/A technologies
2MA PHIT- Wastewater Certificate Program, Session 5
3MA PHIT- Wastewater Certificate Program, Session 5
MA PHIT- Wastewater Certificate Program
Session 5 2
Non-Conventional Designs
Situation SolutionSoil too wet for percolation test Sieve test and analysis (upgrades
only) – part of Local Upgrade Approval (LUA)
Upgrade plan does not meet all Title 5 standards
Local Upgrade Approval or Variance*
Project is proposed for over 2,000 gallons per day
Assessment of the soil and ground-water conditions and pressure distribution (PE must be designer)
Domestic garbage grinder Oversize/multi-compartment septic tank and SAS
Upgrade is costly and waivers to standards are being sought
MassDEP Cost Guidance
4MA PHIT- Wastewater Certificate Program, Session 5
Non-Conventional Solutions
Situation SolutionCannot meet new construction requirements of Title 5
Variance*
Shared system or components Application and approval process
Nitrogen concerns Nitrogen loading and aggregation
Variation from design flow table Site-specific flow determination
Severe limitations to conventional treatment
• Tight tank• Composting toilet• Innovative/Alternative (I/A)
Technology
5MA PHIT- Wastewater Certificate Program, Session 5
Soil Is Too Wet to Perform a Percolation Test
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MA PHIT- Wastewater Certificate Program
Session 5 3
Upgrade Plan Does Not MeetTitle 5 Standards
7MA PHIT- Wastewater Certificate Program, Session 5
Flow Over 2,000 GPD
1. Assessment of the soil and groundwater conditions beneath the proposed SAS
8MA PHIT- Wastewater Certificate Program, Session 5
Flow Over 2,000 GPD, cont.
2. Pressure distribution or drip dispersal
(MassDEP Guidance)
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MA PHIT- Wastewater Certificate Program
Session 5 4
Pumping in General
Pumping to septic tank Permitted if comply with 310 CMR 15.229
If not, MassDEP approval is required (BRPWP67)
Pumping to SAS Pressure distribution
Required for all systems of 2,000 gpd or greater
Dosing vs. Pressure Distribution
10MA PHIT- Wastewater Certificate Program, Session 5
Domestic Garbage Grinder
Under sink garbage disposal impacts the design of an onsite wastewater system
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Upgrade is Costly
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MA PHIT- Wastewater Certificate Program
Session 5 5
Cannot Meet New Construction Requirements
Variances may be allowed
High standard
Application and review process
13MA PHIT- Wastewater Certificate Program, Session 5
Shared System or Components
One or more properties sharing all or parts of an on-site wastewater system
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Nitrogen Concerns
Nitrogen is a pollutant of concern in potable drinking water, and in coastal embayments which are not well flushed
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MA PHIT- Wastewater Certificate Program
Session 5 6
Design Flow Variations
Title 5 has a table for standard facilities but sometimes this table is not relevant. A site-specific assessment must be made, for design purposes. Examples?
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Severe limitations
May install:
Tight tanks
Composting toilets
Innovative or Alternative (I/A) Technology
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I/A Certification
There are four types of approvals
Remedial
General
Provisional
Piloting
http://www.mass.gov/eea/agencies/massdep/water/wastewater/title-5-innovative-alternative-technology-approvals.html
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MA PHIT- Wastewater Certificate Program
Session 5 7
Limitations to Conventional Treatment
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I/A Classification
Secondary treatment units
Buried filter units
Alternative disposal systems
Restorative treatment
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Secondary Treatment Units
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MA PHIT- Wastewater Certificate Program
Session 5 8
Buried Filter Units
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Alternate Disposal Systems
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Restorative Treatment
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MA PHIT- Wastewater Certificate Program
Session 5 9
I/A Summary
Allowed by Title 5
Generally provide equal or better protection of the environment
Require more detail by designer
Require vigilant review by BOH
Use MassDEP website for approval lists and letters
25MA PHIT- Wastewater Certificate Program, Session 5
Session Recap
After completing this session, you will be able to:
Describe situations that require non-conventional solutions
Explain non-conventional solutions and the required approval process for each
List and define the innovative/alternative (I/A) technology classifications
Describe certain I/A technologies
26MA PHIT- Wastewater Certificate Program, Session 5
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