Onsite Sewage Treatment And Disposal

(1) Any reductions in Gravel Field Standard bottom area for a dwelling using any permitted disposal product as an alternative to the Gravel Field Standard as calculated in 420-3-1-.53 Gravel Field Standard EDF Sizing for Dwellings, shall be expressed as a percent reduction of bot…

General Requirements. The procedure for EDF sizing for establishments depends on the estimation of volume and strength of waste. If ADPH determines the waste has not been appropriately characterized, ADPH may offer the option of a temporary Performance Permit so that the applican…

(1) The responsible person shall ensure the following: (a) The EDF or discharge area shall be constructed so as to encompass the applicable number of permeability tests used to design the OSS or EDS. (b) An EDF shall not be constructed in Texture Group 3, 4A, 4B, or 4C soils duri…

(1) The shallow placement of an EDF may be utilized to overcome soil and site limitations. Except as provided in this rule, the requirements for the design and installation of a shallow placement EDF shall be the same as for other OSSs. (2) Shallow trenches may be used under the …

(1) General Requirements. Distribution piping shall be installed at the same elevation, unless an approved system provides for a design ensuring equal flow through each of the perforations and the effluent is uniformly applied to the soil infiltrative surface. (a) The minimum acc…

(1) As an alternative to a trench system, a pad or bed may be utilized. All sewage subject to this paragraph shall be pretreated to the secondary effluent standard. (a) The total bottom area for all pads shall be computed by dividing the design flow by the loading rate found in T…

For proposals utilizing CTD, construction specifications shall be stated in the specific design manual that is a part of the issued product permit. The size of the combined treatment and disposal system shall be computed by dividing the design flow by the loading rate in Table 11…

(1) General Requirements. If site conditions and/or characteristics of a given lot prohibit the use of a Conventional OSS in accordance with the requirements of these rules, the LHD may consider approval of plans for the installation of a Controlled Fill Mound System. Controlled …

(1) General. The drip irrigation field size shall be based on Table 12. (a) All components shall be designed and manufactured to conform to the applicable ASTM standards for sewage disposal. (2) Installation. Drip lines shall have a minimum soil cover of 6 inches and a maximum de…

(1) EDFs requiring more than 1,400 linear feet of EDF pipe, as determined by the Gravel Field Standard, shall be divided into separate and equal EDFs containing less than or equal to 1,000 linear feet of EDF trench in each field and shall comply with the following requirements: (…

(1) Graywater (not including water from spas) from a single-family dwelling shall be disposed of by one of the following methods: (a) Discharge into the building sewer. (b) Discharge into a separate EDF. The size for a separate EDF for graywater shall be no less than 25 percent o…

(1) The minimum setback distances for EDFs, septic tanks, pump chambers, aerobic pre-treatment devices (including sand filters, biofilters, and ATUs}, header lines and similar devices, and various structures and topographic features, are contained in Table 4. (2) No underground u…

(1) Permit denials, suspensions, and revocations. The denial, suspension, and/or revocation of a permit shall be governed by the Alabama Administrative Procedure Act, §41-22-1, et seq., Code of Ala. 1975. (2) Bearings. (a) Contested case hearings shall be provided in accordance w…

Agents and employees of the ADPH or the LHD shall be permitted access to all property on which an OSS/EDS is proposed or on which an OSS/EDS has been installed for the purpose of consultation, evaluation, and/ or inspection and determining compliance with these rules.

(1) Approval of a lot, Large-Flow Development, building development, or method of sewage disposal by ADPH, the LHD, or its agents does not constitute or imply approval by a municipality, county, or other entity having planning, zoning, or other legal jurisdiction. Similarly, appr…

The issuance of any permit under these rules and a subsequent Approval for Use shall not be a guarantee or warranty, implied or expressed, that the system will function satisfactorily for any given period.

Written requests for a variance to these rules shall be submitted and considered pursuant to Rule 420-1-2-.09, Ala. Adm.in. Code, Waivers or Variances.

Design Flow and Wastewater Concentrations Table 1 Dwellings (rule) (4) Generator Design Unit d $$ $$$ ee Dwelling (12 bedrooms or fewer) per bed-com 150 13 or more bedrooms to a single system per person 75 Establishments (guidelines) (7) Generator Design Unit (3) ee iid Airport (…

Table 10 Loading Rates for a Pad PERC RATE SOIL GROUP LOADING RATE min/inch U.S.D.A. Textures gpd/sq.ft. 5-15 Sand, Loamy Sand 2.31 20-30 Sandy Loam, Loam, 1.54 35-45 Sandy Clay Loam, 0.952 50-60 Sil Loam, Silty Clay 0.893 Loam, Clay Loam 65 0.631 70 Sandy Clay, Silty see by Clay…

Table 11 Loading Rates for Beds with Advanced Treatment and Combined Treatment and Disposal Systems T PERC RATE SOIL GROUP LOADING RATE min/inch U.S.D.A. Textures gpd/sq.ft. 5 1,50 10 aa i 1.50 15 ant 1.50 20 1.00 95 ar ci 1.00 30 1.00 35 0.71 40 Sandy Clay Loam, 0.71 45 Silt Loa…

Table 12 Loading Rates for Drip Irrigation Systems PERC RATE SOIL GROUP LOADING RATE min/inch U.S.D.A. Textures gpd/sq.ft. <5 0.45 5 Sand, Loamy Sand 0.45 10 0.45 15 0.45 20 0.4 25 0.4 30 0.4 Sandy Loam, Loam 35 0.4 40 0.4 45 0.4 50 | 0.3 55 0.3 60 | Sandy Clay Loam, 0.2 65 | Sil…

Table 13 Low Pressure Pipe (LPP) Fill Material Loading Rates for Controlled Fill Mound Systems SOIL TEXTURE PERCOLATION LOADING RATE LOADING RATE RATE w/secondary gpd/sq.ft. treatment Min/inch gpd/sq.ft. Sand 5 to 10 1.0 2.0 Loamy sand 11 ta 19 0.8 1.5 Sandy loam 20 to 30 0.6 1.0…

Table 14 Low Pressure Pipe (LPP) Basal Area Loading Rates for Controlled Fill Mound Systems SOIL GROUP PERCOLATION LOADING RATE LOADING RATE RATE w/secondary See Table 2 and gpd/sq.ft. treatment Table 3 Min/inch gpd/sq.ft. Group 1 5 to1s 1.0 to 0.8 2.0 to 1.6 Group 2 16 to 30 0.8…

Table 15 Reductions for Controlled Fill OSS with LPP/Drip Receiving Effluent Treated to Secondary Standards EDF Separation Requirement (Trench/Bed Bottom to Restrictive Layer) | Pipe Type | Chroma 2 (ASHES) | Bedrock | Other R/L and soils with permeability > 240 min/inch | |---|-…

Table 16 Controlled Fill Material Guide (For determining suitable fill material when naturally available fill is used)(1) | Evaluation Method | Suitable | Marginal | Unsuitable | |---|---|---|---| | Percolation | 5-30 min/inch | 31-45 min/inch | <5 or >45 min/inch | | Unified | 1…

Table 17 Minimum Lot Size Categories For Dwellings or Establishments on Individual Systems!) 3/19/06 to current Private (well) Recording Water Type Lot Date supply | is Eegewdcemaay | Before 10/18/1978 Public/Private Both No minimum Before 3/18/1982 Fobifodtatvate | ~Non-Large-Rl…

Table 18 Site Limitations T CONVENTIONAL ENGINEERED SYSTEM LIMITATION | SLIGHT | MODERATE SEVERE EXTREME Slope (%) 0-15 16-25 26-40 >40 (0 Flooding 7 Rare Occasional Frequent ()) Frequency aed <5% 5-50% >50% Chance /Year Summit, . Shoulder, | Lower Back 706; Swamo, Webands; Landf…

Table 19 Site Investigation Requirements for Small-Flow Single-Family Dwellings Method 2 tests & 2 Tn proposed eee of Location on Lot | Test in REDF (req. for OBES lots <15,000 sq ft} 1 test & | boring acre 1-.49 Soil Maps Percolation “borings EDF/EDS area Unified 2 EDFYEDS on ; …

Table 2 Gravel Field Standard Sizing by Texture Group, Percolation Rate, and Wastewater Concentration()) Field Size for Sewage Treated to Primary ss Effluent Standards Based on 0.4 Ibs. BOD/Day/Bedroom?! Primary EDF!) ) Tt) Linear feet/bedroom a ate Feet =“ aaa BOD Loading (vt) p…

Table 20 Unified Method | Soil Class/Texture Group | Unified System Symbol | Percent Fines Clay/Silt | Percent Liquid Limit | Percent Plastic Index | Estimated Permeability Min/Inch | |---|---|---|---|---|---| | 1A | SP, SW, GP, GW | <12 | | | <1-<5* | | 1 | SM, SP-SM, GM | 12-20…

Table 21 Soil Morphology Method Texture Groups Min/Inch Sicumene anata alesse 18, LS 5-15 2SL,L (<20% clay) 16-30 3 SCL, SC, Ch, L, SICL, SiL (20-40% clay) 31-60 4A SC, SiC, C (low s/s, kaolinitic) 61-90 | 4B SC, SiC, C (moderate s/s, mixed) 91-120 7 4C SC, SiC, C (high s/s, smec…

Table 3 Gravel Field Standard Sizing by Texture Group, Percolation Rate, and Wastewater Concentration) Field Size for Sewage Treated to Primary Effluent Standards Based on 0.4 Ibs, BOD/Day/Bedroom?) Primary EDF) ™ fii) (tt) Linear feet/bedroom Square Feet BOD Loading Rate wy per …

Table 4 Minimum Setback Distances to Components of an OSS’ Minimum Horizontal Distance (ft) To Tank, Treatment Structure or Topographic Feature To Device, Pump Gomtpatnet , EDF! Chamber, Receptacles, ree ao and D-Box _ EDF of another system io 10 5 Components of another system (e…

Table 5 Additional Minimum Setback Distances for Large-Flow OSSs that DO NOT HAVE ADVANCED TREATMENT and/or are not Managed by a Governmental Agency, Co-Op, or Wastewater Management Entity To EDF Structure or Topographic Feature Minimum Horizontal Distance (ft) Property line 25 S…

Table 6 Additional Minimum Setback Distances for an Innovative EDS!) From Point of Discharge Structure or Topographic Feature | Minimum Distance (ft)@) Property line mS Surface water, hydric soils, or frequently flooded areas 100 Drainage way or storm water diversion 50 Potable (…

Table 7 MVS Requirements (For LPP/Drip See Table 15) a CONVENTIONAL _ ENGINEERED LIMITATION | SLIGHT | MODERATE SEVERE Ss qa 1. Percolation _ | 121- (Min /In)?) 9-30 31-90 91-120 1-<5 240 >240 1-<5<1 Ta MVS3) iaae Beda 24” 18” 18” 36" 1g” | 12 1b MVS from , . > | cep na 24” Nard …

Table 8 Slope Spacing of Trenches Based on Width of Trench and Slope for a Conventional Gravel-Field Standard OSS with a Level Header Minimum Percent Trench Spacing (Side Wall to Side Tranah Minimum Slope Wall) Depth’) Barer 6 feet a | ie | 7 feet av | oar | ") The distances betw…

Table 9 Septic Tank Capacities for Dwellings Without Advanced Treatment!) Minimum Effective Liquid Number of Bedrooms Capacity (gal) 4 or fewer - 1,000 | _ 5 : 1,500 Each additional bedroom, add a 250 "!) Capacities listed provide for a single system to scrve household wastes fro…