Onsite program adjustments
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Transcript of Onsite program adjustments
Onsite Sewage and Disposal RulesWhere are we?
Where are we going?
Thad Pittman, Acting DirectorDivision of Community
Environmental Protection
Revision
• Around 180 proposed changes– Majority
• Grammatical• Clarification
• Some are changes worth noting
Complete Reorganization and Renumbering
• Divided into 3 main sections– General Rules
• Definitions, Septic Tanks, Pumpers, Certifications
– Site Evaluation• Percolation testing, Morphology, Unified, Soil Mapping
– Design • Sizing, Construction requirements, Control Fill, Lot modification
Small Flow vs Large Flow
• Current Rule– Small Flow – < 8 bedrooms or <1200 gpd total development flow.
– Large Flow – > 8 bedrooms or > 1200 gpd total development flow.
• Proposed Change– Small Flow ‐ < 12 bedrooms or <1800 gpd total development flow
– Large Flow ‐ > 12 bedrooms or > 1800 gpd total development flow
Bed Designs
• Added a section detailing constructions requirements for beds in lieu of trenches.– Group I, II, III and some IVA soils
– Treat to secondary limits• Size of bed based on new Table 18.
• Still working on final version.
Tables/Figures/Forms• Table numbers will change in new rule due to new and deleted ones from the current rule.
• Additions/deletions/clarification to Table 1 Flow and Organic Loading
• Table 2 removed• Table 3/3a
– Changes and clarification to last two columns• BOD loading rates and Hydraulic loading rates
• Table 5 Setbacks– Minor adjustments– Drip irrigation added to reduced setback for cuts/drains
• Table 17 – new– Minimum lot sizes based on recorded date
Proposed Table 15 Changes
• Current Table– Percolation Rate
of 5 – 60 mpirequires 24 MVS from /2 or less
• Proposed Change– Percolation Rate
of 5 – 30 mpirequires 24 MVS from /2 or less
– 31 – 120 mpirequires 18 MVS from /2 or less
420‐3‐1‐.67 Lot Modification and Controlled Fill Systems
• Completely rewritten – Split Lot Modification and Control Fill into two separate sections
• Currently, rule is confusing
• Attempt to clarify and simplify?
Mine Spoil Sites
• Mine Spoils– Corridor X –
Birmingham to Memphis
– Numerous areas with nothing but this type of material
• Added definition and language to deal with mine spoil sites
Plat Signing
• Proposing new section– Refines under what conditions the ADPH will sign a surveyed plat
• Large Flow Development with Small Flow Systems• Large Flow Development with Large Flow System
– Management Entity– ADEM systems
• Does have a caveat for special local circumstances
Forms
• All Forms removed from rule.– Separate so as to be able to make corrections without having to go thru rule‐making procedure.
– CEP‐2, CEP‐2/3, CEP‐3, CEP‐5, CEP‐6, CEP‐7 and CEP‐11
ADPH – Onsite Update
Numbers
• These numbers reflect new installations and repairs combined.
Fiscal Year Permits Issued Approval issued (installed)
2007 17037 16223
2009 9480 7382
2011 8426 8292
2013 7080 9192
ADPH – Onsite Program Changes
Budgetary Cut Impacts
Engineer Designed Systems• Rule 420‐3‐1‐.35:
– The system will handle any amount of high‐strength sewage.– The site characteristics prohibit the use of a conventional system, or require
any cut or fill to be used except that necessary to cover a shallow placement system.
– The lot is smaller than the minimums set out in Rule 420‐3‐1‐.09, Minimum Lot Size Requirements for Sites Using an OSS.
– Sites that require mound systems as described in Rule 420‐3‐1‐.66, Mounds.– Sites which have received or will require Modification or Fill as described in
Rule 420‐3‐1‐.67, Lot Modification and Controlled Fill Systems.– The REDF is to be smaller than the primary EDF or the REDF includes driveway
or parking areas.– A holding tank is specified. See Rule 420‐3‐1‐.55, Holding Tank Requirements.– An OSS using complex pumping systems.
• A single, demand‐type pump that pumps effluent from the pump chamber to a non‐pressurized EDF is not considered a complex system unless the field must be dosed to comply with Rule 420‐3‐1‐.43, EDF Dosing Requirements. The pump used must meet the requirements of Rule 420‐3‐1‐.65, OSS Requiring Pumping of Effluent.
• Pressurized fields of any type are considered complex systems.– Sites with a percolation rate over 120 min/inch.– Sites with slope of over 25%.
Program Changes
• For any submittal that indicates an Engineer Design (see 420‐3‐1‐.35), the LHD:– Shall not conduct a site visit to confirm suitability; and
– Shall not conduct any installation inspection.• For Conventional Systems, business as usual; except– Reduce the installation inspection rate of 75% minimum to 50% minimum.
Questions?