reglab/statecodes huggingface dataset:
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 4 - AGGREGATE › Rule 15-18-77-5.4.8 - Shallow Disposal Fields

Current through June 25, 2024
Shallow aggregate systems can sometimes be used where the
						depth to the restrictive horizon or water table is less than 25 inches.
						Placement of the system may be as shallow as 12 inches for aggregate systems
						[Figure 2 and Section IV part 14 and 15 of this design standard]. Shallow
						installations may be placed in any texture shown as suitable in Table
						II.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 4 - AGGREGATE › Rule 15-18-77-5.4.9 - Absorption Beds

Current through June 25, 2024
1. Absorption beds
					 and trenches should be located a minimum of 10 feet from any trees, except for
					 subsurface drip irrigation.
2.
					 Absorption beds have a smaller "footprint" than the same square footage of
					 trench system. This lends them useful in certain installations where the amount
					 of useable space is limited. [FIGURE 3].
3. The amount of bottom absorption area
					 required shall be the same as shown in [TABLE II]. The bottom of the bed should
					 have a relatively level grade.
4.
					 Lines for distributing effluent shall be spaced from 3 to 6 feet apart and not
					 greater than 3 feet from the sidewall. The number of lines will depend on the
					 square feet and width of the bed to be constructed.
5. Care should be taken to prevent heavy
					 machinery from damaging the bed during backfilling.
6. The effluent must be equally distributed
					 to the bed by means of a distribution box or with a pipe manifold [FIGURE 4].
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 4 - AGGREGATE › Rule 15-18-77-5.4.10 - Distribution of Effluent › 15-18-77-5.4.10-I - SETBACK REQUIREMENTS FROM SENSITIVE WATER

Current through June 25, 2024
Minimum Distance from the Water Edge
Soil Textural Class
Slope of Less Than 8
									 Percent
Slope of More Than 8
									 Percent
Gravel
NOT APPLICABLE
Coarse
Sand
50 feet
50 feet
Medium
Sand
50 feet
50 feet
Fine
Sand
50 feet
50 feet
Loamy Sand
50 feet
50 feet
Sandy Loam
50 feet
50 feet
Light
Loam
50 feet
50 feet
Heavy
Loam
50 feet
50 feet
Silt Loam
50 feet
50 feet
Sandy Clay Loam
50 feet
50 feet
Light
Clay Loam
50 feet
50 feet
Heavy
Clay Loam
50 feet
50 feet
Light
Silty Clay
									 Loam
50 feet
50 feet
Heavy
Silty Clay
									 Loam
50 feet
50 feet
Sandy Clay
50 feet
50 feet
Silty Clay
50 feet
50 feet
Clay
50 feet
50 feet
The effluent disposal setback is based on the soil
						  texture of the horizon in which the absorption trench or bed is to be placed.
						  These setbacks are to be used on all individual on-site wastewater disposal
						  systems except
spray irrigation disposal and overland discharge
.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 4 - AGGREGATE › Rule 15-18-77-5.4.10 - Distribution of Effluent › 15-18-77-5.4.10-II - SIZING - AGGREGATE (Gravel, Crushed Stone, Tire Chips, or other approved media)

Current through June 25, 2024
Results of the Soil and Site Evaluation
Soil Textural Class
Ribbon Lengths (Inches)
EPA Manual Application Rate GPD/ Ft 
									 2
Absorption Area Per Bedroom (3'
									 Trench)
Additional Absorption Area Over 2 Persons Per
									 Bedroom
Ft 
									 2
Lf
Ft 
									 2
Lf
Gravel
-
-
NOT SUITABLE
Coarse
Sand
-
1.2
108
36
54
18
Medium
Sand
-
1.2
108
36
54
18
Fine
Sand
-
0.8
163
54
81
27
Loamy Sand
-
0.8
163
54
81
27
Sandy Loam
<.5
0.6
217
72
108
36
Light
Loam
<.5
0.6
108 217
72
108
36
Heavy
Loam
.5 - 1
0.45
289
96
144
48
Silt Loam
<1
0.45
289
96
144
48
Sandy Clay Loam
1 - 2
0.45
289
96
144
48
Light
Clay Loam
1 - 1.5
0.30
433
144
217
72
Heavy
Clay Loam
1.5 - 2.0
0.20
650
217
325
108
Light
Silty Clay
									 Loam
1 - 1.5
0.30
433
144
217
72
Heavy
Silty Clay
									 Loam
1.5 - 2.0
0.20
650
217
325
108
Sandy Clay
>2.0
-
NOT SUITABLE
Silty Clay
>2.0
-
NOT SUITABLE
Clay
>2.0
-
NOT SUITABLE
Figure I - Conventional Subsurface Absorption
Trench Cross Section
Click Here To View
						  Image
Figure II - Ultra Shallow Absorption Field
Click Here To View
						  Image
Figure III - Conventional Absorption Bed
Click Here To View
						  Image
Figure IV - Effluent Distribution for Absorption Beds
Click Here To View
						  Image
Figure V - Connection Lateral [Spill overs]
Click Here To View
						  Image
Figure VI - Conventional Absorption Bed
Click Here To View
						  Image
Figure VII - Distribution Box
Click Here To View
						  Image
Miss Code Ann.
						  §
													41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.1

Current through June 25, 2024
In a conventional onsite wastewater system treatment
						begins in the septic tank, under anaerobic conditions. Final treatment and
						disposal takes place in the soil of the drain field, an aerobic environment. It
						is necessary for this aerobic condition to exist in the soil of the drain field
						for proper treatment of the effluent.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.2 - Definitions

Current through June 25, 2024
1. Chamber System - a system of bottomless
					 molded plastic chambers installed in direct contact with the trench bottom to
					 infiltrate primary treated effluent into the soil for final treatment and
					 disposal.
2. Aggregate Replacement
					 Disposal System - any normally gravity-fed subsurface disposal field utilizing
					 an alternate media or technology to act as a replacement for the aggregate
					 media. These system depths range from 36 to 6 inches in depth.
a. Standard Subsurface Disposal 25 in. to 36
					 in.
b. Shallow Subsurface Disposal
					 13 in. to 24 in.
c. Ultra-shallow
					 Subsurface Disposal 6 in. to 12 in.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.3 - Site Evaluation

Current through June 25, 2024
1. Information
					 obtained during the soil and site evaluation will determine which type(s) of
					 IOWDS may be utilized for an individual lot.
2. Prior to completing the Soil and Site
					 Evaluation/System Recommendation, the Environmentalist shall visit the lot and
					 conduct the soil and site evaluation.
3. The soil determinations will be made based
					 on soil borings to a depth of five feet or to a depth sufficient to reach a
					 restrictive horizon. Restrictive soil or site conditions may preclude the use
					 of any subsurface disposal system.
4. A soil and site evaluation will be based
					 on the following criteria:
a. Absence of or
					 protection from frequent flooding.
b. Landscape position with good surface
					 runoff.
c. Slopes of less than
					 15%.
d. Depth to high water table
					 of greater than four feet.
e. Depth
					 to bedrock, fragipan or plinthite of greater than four feet.
f. Soil texture and color defined by the
					 Natural Resource Conservation Service as indicating good drainage and
					 suitability for soil absorption, based on a soil boring of five feet.
g. Available area in which to
					 install an individual onsite wastewater disposal system meeting all
					 requirements of this regulation. The area for repairs and future extensions
					 shall be no less than 50% of the space required for the recommended system.
					 Systems utilizing surface land application discharge are exempt from the 50%
					 additional area requirement.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.4 - Location of Onsite Wastewater Disposal Systems

Current through June 25, 2024
1. All
					 components of the onsite wastewater disposal system shall be located a minimum
					 of:
a. five feet from any dwelling.
b. ten feet from any property line.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.5 - Underground Absorption

Current through June 25, 2024
1. Aggregate
					 replacement systems shall comply with all criteria for subsurface gravel
					 disposal systems except in sections pertaining to the gravel media or as
					 specified in this regulation.
2.
					 The size of the subsurface sewage disposal system shall be determined by soil
					 texture and estimated wastewater flow.
3. Soils with excessively rapid permeability
					 rates, gravel and coarse sand, shall be considered unsuitable for subsurface
					 disposal unless the native soil is replaced with a suitably thick (greater than
					 two feet) layer of loamy sand or sand textured soil.
4. Soils with excessively slow permeability
					 rates, silty clay and clay, shall be considered unsuitable for conventional
					 subsurface disposal.
5. Subsurface
					 disposal systems shall be placed no deeper than 36 inches below the surface.
6. Aggregate replacement
					 subsurface disposal systems shall have a minimum 12 inches of soil backfill.
7. The minimum distance between
					 absorption trench sidewalls shall be six feet.
8. Trenches shall not be excavated when the
					 soil is wet enough to smear or compact easily.
9. There shall be a minimum of three feet of
					 undisturbed soil between the excavation for the septic tank or treatment plant
					 and the beginning of the absorption trench, bed or effluent line.
10. The bottom of the outlet of the septic
					 tank, aerobic treatment plant or vessel supplying effluent to the pipe must be
					 a minimum of one inch above the top of the aggregate replacement system.
11. Care must be taken when
					 backfilling to prevent the pipe from shifting during the backfilling process.
12. Soil material excavated from
					 trenches shall be used in backfilling and should be left mounded over the
					 trenches until initial settling has taken place.
13. Standard manufactured fittings compatible
					 with the pipe shall be used to connect all pipes within the effluent disposal
					 field.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.6 - Alternating Disposal Fields

Current through June 25, 2024
1. An alternating
					 effluent disposal field system provides two complete disposal fields, separated
					 by a valving system so that each system could alternately be used and rested.
					 This "resting" has shown to be useful in regenerating the soil's capability for
					 absorbing the effluent.
2. The size
					 of each field can be from 50 to 100 percent of the required square footage of a
					 single disposal field.
3. The
					 length of time each field would be used and then rested will be determined on a
					 case-by-case basis.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.7 - Shallow and Ultra-shallow Disposal Fields

Current through June 25, 2024
Shallow or ultra-shallow systems can sometimes be used
						where the depth to the restrictive horizon or water table is less than the
						minimum required. Placement of the system may be as shallow as 6 inches for
						large diameter double-six aggregate replacement pipe systems. Ultra-shallow
						installations shall be restricted to soil textures of loam or lighter. Shallow
						installations may be placed in any texture shown as suitable in the system
						specific sizing tables.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.8 - Sizing

Current through June 25, 2024
The large diameter aggregate replacement systems shall be
						sized in accordance with the following tables.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.9 - Construction

Current through June 25, 2024
1. Large diameter aggregate replacement
					 absorption trenches shall be a minimum of 24 inches and a maximum of 36 inches
					 in width.
2. The bottom of the
					 trenches or bed and the distribution lines shall have a grade from level to no
					 greater than two inches fall per 100 feet for double six inch large diameter
					 aggregate replacement pipe and one inch fall per 100 feet for eight and ten
					 inch large diameter aggregate replacement pipe.
3. Overlap filter wrap at coupling joints and
					 seal using factory approved methods.
4. The 4" pipe from the septic tank, aerobic
					 treatment plant or vessel supplying effluent to the aggregate replacement pipe
					 shall be installed into an offset connector particular to the type and
					 manufacturer of the pipe. These connectors will also be used when crossovers
					 are constructed to change elevations of field system.
5. Fabric must be pulled over offset
					 connector and sealed using a factory approved method.
6. The ends of the large diameter aggregate
					 replacement pipe shall be closed with an end cap particular to the type and
					 manufacturer of the pipe.
7. Care
					 must be taken during backfilling to prevent the aggregate replacement pipe from
					 "crawling" when backfill is applied.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.10 - Distribution of Effluent

Current through June 25, 2024
1. Aggregate
					 Replacement Pipe Systems
a. When a change in
					 elevation of the disposal trench is required, a distribution box, connecting
					 lateral or crossover must be used. At the point where a crossover line leaves a
					 lateral, the trench for the crossover line shall be dug no deeper than the top
					 of the Aggregate replacement pipe in the preceding trench so that an
					 undisturbed block of earth will remain in place for the full depth of the
					 aggregate replacement pipe. The distribution box shall be level and supply all
					 lines equally. Field lines must be equal lengths when served by one
					 distribution box.
b. Distribution
					 boxes may be used to connect the effluent line to the effluent distribution
					 lines. Non-perforated rigid pipe shall exit the distribution box for a minimum
					 of five feet at level grade before the effluent distribution line
					 (perforations) begins.
c. Crossover
					 lines shall be laid on undisturbed earth. The invert of the crossover must be
					 at least four inches lower than the invert of the septic tank outlet line.
					 Crossovers shall be constructed as shown in Figure 1.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.11 - Absorption Beds

Current through June 25, 2024
Absorption beds may be constructed using large diameter
						aggregate replacement filter wrap pipe.
1. Absorption beds and trenches should be
					 located a minimum of 10 feet from any trees.
2. The amount of linear footage required
					 shall be the same as for trench configurations. The bottom of the bed should
					 have a relatively level grade; the grade within the bed shall not exceed the
					 grade allowed for trench installations.
3. Lines for distributing effluent shall be
					 spaced from 3 to 6 feet apart with the first and last pipe placed next to the
					 sidewall of the bed. The number of lines will depend on the lineal feet of
					 aggregate replacement line (Table II & III) and width of the bed to be
					 constructed.
4. Care should be
					 taken to prevent heavy machinery from damaging the bed during backfilling.
5. The effluent must be equally
					 distributed to the bed by means of a distribution box or with a pipe manifold.
6. When a change in elevation of
					 the disposal trench is required, a connecting lateral or crossover must be
					 used. At the point where a crossover line leaves a lateral, the trench for the
					 crossover line shall be dug no deeper than the top of the aggregate replacement
					 pipe in the preceding trench so that an undisturbed block of earth will remain
					 in place for the full depth of the pipe. Crossover lines shall be laid on
					 undisturbed earth. The invert of the crossover must be at least four inches
					 lower than the invert effluent line of the septic tank, aerobic treatment plant
					 or vessel supplying effluent to the pipe [Figure 1].
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.12 - Multi-Pipe Aggregate Replacement Systems

Current through June 25, 2024
1. General: The
					 multi-pipe aggregate replacement system is a system that utilizing bundles of
					 four inch perforated pipe to provide a void space. The top pipe in one bundle
					 of this system receives the treated effluent for distribution throughout the
					 disposal system. All multi-pipe aggregate replacement systems must be installed
					 by a Certified Installer that is factory-trained and authorized by the
					 manufacturer.
2. Sizing: The
					 multi-pipe aggregate replacement systems shall be sized in accordance with the
					 TABLE IV.
3. Construction
a. The bottom of the trenches and the
					 distribution lines shall have a grade from level to no greater than two inches
					 fall per 100 feet for multi-pipe aggregate replacement systems.
b. Multi-pipe aggregate replacement system
					 trenches shall be a minimum of 24 and a maximum of 36 inches in
					 width.
c. The multi-pipe aggregate
					 replacement system must be installed with effluent being distributed to each
					 trench distribution pipe by use of a distribution box or a level pipe header.
i. When a change in elevation of the disposal
					 trench is required, a distribution box or approved crossover shall be used. The
					 distribution box, if used, shall be level and supply all lines
					 equally.
ii. Distribution boxes may
					 be used to connect the effluent line to the effluent distribution lines.
					 Non-perforated rigid pipe shall exit the distribution box for a minimum of five
					 feet at level grade before the effluent distribution line (perforations)
					 begins.
d. The system
					 shall be covered with a manufacturer-approved, geotextile cloth before
					 backfilling.
e. The geotextile
					 cloth shall cover the open ends of the void and distribution pipes at their
					 termination at the ends of the trench.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.13

Current through June 25, 2024
When a change in elevation of the disposal trench is
						required, an additional distribution box or connecting lateral/crossover must
						be used. At the point where a crossover line leaves a lateral, the trench for
						the crossover line shall be dug no deeper than the top of the multi-pipe
						aggregate replacement distribution pipe in the preceding trench so that an
						undisturbed block of earth will remain in place for the full depth of the
						distribution system. Crossover lines shall be laid on undisturbed earth. The
						invert of the crossover must be at least four inches lower than the invert
						effluent line of the septic tank, aerobic treatment plant or vessel supplying
						effluent to the pipe.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.14 - Absorption Bed [Multi-pipe System]

Current through June 25, 2024
1. Multi-pipe
					 systems installed in a bed configuration shall have the same lineal foot
					 requirements as indicated for their respective trench configurations. The
					 length and width of the bed to be constructed will be determined by the number
					 of multi-pipe systems wide and the length selected to comply with the lineal
					 footage required under Table IV.
2.
					 The multi-pipe system shall be placed side by side in the bed. Any side by side
					 placement of multi-pipe systems shall constitute a bed.
3. The bottom of the bed should have a
					 relatively level grade, from the end and side to side. The grade within the bed
					 shall not exceed the grade allowed for trench installations.
4. The effluent must be equally distributed
					 to the bed by means of a distribution box or with a pipe manifold.
5. The multi-pipe system may be cut in-order
					 to accommodate setbacks. The multi-pipe system shall be cut to a length which
					 preserves the integrity of the banded void pipes and provides adequate banding
					 of the system a minimum of every 18 inches to a maximum of every 20 inches.
					 Manufactured couplers shall be used to join cut ends of the void
					 pipes.
6. The system shall be
					 covered with a manufacturer-approved geotextile cloth before
					 backfilling.
7. The geotextile
					 cloth shall cover the open ends of the void pipes.
8. Care should be taken to prevent heavy
					 machinery from damaging the bed during backfilling.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.15 - Expanded Polystyrene (EPS) Aggregate Systems

Current through June 25, 2024
1.
					 General: The EPS Aggregate system utilizes bundles of expanded polystyrene
					 aggregate to replace rock aggregate in a subsurface disposal system. Effluent
					 is distributed via a 4 inch perforated pipe incorporated into the center of one
					 EPS bundle. System configurations of multiple bundles will incorporate one
					 bundle run containing the 4 inch perforated pipe in conjunction with bundles
					 containing only EPS aggregate. This 4 inch perforated pipe receives the treated
					 effluent for distribution throughout the trench. The expanded polystyrene
					 aggregate must be contained in a material that is resistant to the effects of
					 wastewater, will prevent the loss of aggregate from the container and strong
					 enough to retain the shape of the bundles during system installation and
					 backfilling. All EPS Aggregate Systems must be installed by a factory-trained
					 installer that is an authorized representative of the manufacturer.
2. Construction
a. The EPS Aggregate System absorption
					 trenches shall be a minimum of 24 inches and a maximum of 36 inches in width.
b. The bottom of the trenches and
					 the distribution lines shall have a grade from level to no greater than two
					 inches fall per 100 feet.
c. The
					 grade shall be measured from the trench bottom and not the effluent
					 distribution line encased in the EPS bundle.
d. The EPS Aggregate system shall be covered
					 with an approved cover material before backfilling. Covering material shall
					 consist of craft paper or other bio-degradable product approved and/or supplied
					 by the manufacturer.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.16 - Chamber Subsurface Disposal Systems

Current through June 25, 2024
1. General:
					 Chamber systems utilize molded plastic bottomless chambers which are installed
					 in a drain field excavation with the open bottom of the chamber in direct
					 contact with the trench bottom. The chambers are linked together in such a
					 manner as to completely cover the excavation with adjacent chambers in contact
					 with each other. Effluent is introduced into the chambers and is absorbed into
					 the soil for final treatment and disposal. All chamber systems must be
					 installed by a factory trained and authorized installer.
2. Chamber Class Designation
a. Each model of chamber will be assigned a
					 class designation based on the bottom square footage of the chamber section.
					 This square footage will be derived by a multiple of the outside width and the
					 useable length of the chamber section.
b. Chamber models will be assigned a class
					 designation according to Table VII.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.17 - Construction

Current through June 25, 2024
1. The chamber system absorption trenches
					 shall be a minimum of 18 inches and a maximum of 36 inches in width.
2. The bottom of the trenches shall have a
					 grade from level to no greater than two (2) inches fall per 100 feet.
3. The grade shall be measured
					 from the trench bottom and not the chamber top.
4. The chamber system shall be covered as per
					 the manufacturer's specifications. In all cases there shall be a minimum of 12
					 inches of soil cover over the chamber system.
5. The minimum height of a chamber, at its
					 centerline, shall be 8 inches.
6.
					 The last chamber in each "run" shall be terminated with an end plate.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 5 - AGGREGATE REPLACEMENT › Rule 15-18-77-5.5.18 - Distribution of Effluent [Chamber Systems]

Current through June 25, 2024
1. When a
					 change in elevation of the chamber system is required, a distribution box,
					 connecting lateral or crossover must be used. At the point where a crossover
					 line leaves a lateral, the trench for the crossover line shall be dug no deeper
					 than the top of the endplate inlet or the inlet in the top of the chamber in
					 the preceding trench so that an undisturbed block of earth will remain in place
					 for the full depth of the system. The invert of the crossover must be at least
					 four inches lower than the invert of the septic tank outlet line.
2. Distribution boxes may be used to connect
					 the effluent line to the effluent distribution lines. The distribution box
					 shall be level and supply all lines equally. Field lines (chambers) must be
					 equal lengths when served by one distribution box. Non-perforated rigid pipe
					 shall exit the distribution box for a minimum of five feet at level grade
					 before the effluent distribution line begins.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.1

Current through June 25, 2024
Subsurface Drip Irrigation is a system that utilizes 3
						basic design principles. They are (1) uniform distribution of effluent, (2)
						dosing and resting cycles and (3) shallow placement of tubing. This system uses
						small diameter pipe with emitters and must be preceded by a treatment system
						that conforms to the manufacturer's specifications particular to that system.
						The effluent must be adequately filtered before distribution to the disposal
						field(s). Only Subsurface Drip Irrigation Systems that provide for timed dosing
						are acceptable. The term manufacturer, unless otherwise specified, is
						considered the manufacturer of the treatment device. (Figure I)
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.2 - Definitions

Current through June 25, 2024
1. Advanced Treatment System - an Individual
					 On-site Wastewater treatment system that complies with Section
					 41-67-10.
Miss Code
of 1972, Annotated 41-67-2(a)
2. Components - all physical, mechanical, and
					 electrical components of any wastewater disposal system.
3. Distribution manifold - pvc pipe that
					 delivers the treated effluent to the drip tubing.
4. Emitter - small labyrinth inside of drip
					 tubing that eliminates pressure and releases drops of treated effluent.
5. Maintenance - the inspecting
					 and evaluating of an Alternative System or Advanced Treatment System. The
					 replacement of any component registered with a specific Advanced Treatment
					 System (i.e., aerator, diffuser, control panel, etc.).
6. Subsurface Drip Irrigation System - a
					 system that relies on advanced treatment and filtration of the treated
					 effluent. Final disposal occurs in the upper limits of the soil horizon and is
					 distributed through small diameter tubes that have emitters that slowly drip
					 the treated water into the soil.
7.
					 Tubing - a small diameter line made of a material that forms a tube which
					 contains emitter and manufacturer's fittings.
8. Vacuum breakers/air release valve -
					 relieves pressure off the treated effluent and allows air to escape the system
					 without causing damage.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.4 - Location / Setbacks

Current through June 25, 2024
1. All components
					 of the Subsurface Drip Irrigation System shall be located a minimum of:
a. Water Supply (Public/Private)
i. 100 feet from any public, private or
					 individual potable water sources, unless protected by topographic features.
ii. 50 feet from any public,
					 private or individual potable water source for all vessel(s) holding
					 wastewater.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.5 - Treatment

Current through June 25, 2024
1. Wastewater effluent must meet the
					 requirement established by
American National Standards
					 Institute/National Sanitation Foundation
(
ANSI/NSF)
					 International Standard Number 40
testing protocol, as set forth in
					 Regulations Governing Residential Individual Onsite Wastewater Disposal
					 Systems: Certification. The type of treatment must also conform to drip tubing
					 manufacturers' specifications.
2.
					 The treatment and dosing chamber shall be designed, constructed and installed
					 so all joints, seams, and component parts shall preclude infiltration of
					 groundwater, and prevent escape of wastewater or liquids.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.6 - Distribution

Current through June 25, 2024
1. Drip Tubing
a. The drip tubing may be installed using any
					 of the following methods:
i. Excavation by a
					 trenching machine.
ii. Approved
					 plowing method as determined by the tubing manufacturer. The insertion tool
					 must be of the type that does not pull or stretch the drip line during
					 insertion. The use of "cable plows" or any type insertion method that employs
					 pulling the drip line through the plowed trench is prohibited.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.7 - Documentation

Current through June 25, 2024
1. Installation Manual
a. The drip manufacturer must provide for
					 registration, detailed instructions for installation, initiation of service and
					 operation and maintenance to the distributor, installer and Division of On-site
					 Wastewater. Specific instructions shall include but not limited to:
i. Recommendations concerning types of
					 wastewater which cannot be disposed of by the system.
ii. Arrangement of plumbing connections.
iii. Electrical wiring of
					 components.
iv. Installation
					 instructions that specifies how to locate the system in well drained areas that
					 also provides protection for vents, pumps, filters and controls from snow, ice,
					 or water vapor accumulations.
v. A
					 drawing with each major component numbered, and identified with the same
					 designation on an illustration, photograph, or print.
vi. Recommended frequency of maintenance;
					 maintenance instructions; and procedures for removal and disposal of wastes.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.8 - Responsibility

Current through June 25, 2024
The consumer shall be responsible for maintaining and
						operating the Subsurface Drip Irrigation System in accordance with the
						Regulations Governing Individual On-site Wastewater Disposal Systems,
						Appendixes, advanced treatment system manufacturer's specifications and the
						drip tubing manufacturer's specifications.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.9 - Existing System

Current through June 25, 2024
In addition to the visual inspection conducted by the
						Environmentalist the following will apply:
1. The system must be inspected by a
					 Certified Installer that is manufacturer's authorized representative to verify
					 that the Subsurface Drip Irrigation System is functioning.
2. The manufacturer's authorized
					 representative must furnish written verification, to the Department, that an
					 inspection was made.
Figure I - Subsurface Drip Irrigation System
						(Example Sketch Only)
Click Here To View
						Image
Table I - SIZING - Drip Irrigation
Results of the Soil and Site Evaluation
Soil Textural Class
Loading Rate GPD/
Ft 
								  2
Lf Per Bedroom
Additional Lf/Person Over 2 Person
								  Per
Depth of Drip Line in Inches
Gravel
NOT SUITABLE
Coarse
Sand
0.5
130
65
6-18
Medium
Sand
0.5
130
65
6-18
Fine
Sand
0.5
130
65
6-18
Loamy Sand
0.5
130
65
6-18
Sandy Loam
0.3
217
109
6-18
Light
Loam
0.3
217
109
6-18
Heavy
Loam
0.3
217
109
6-18
Silt Loam
0.3
217
109
6-18
Sandy Clay Loam
0.3
217
109
6-18
Light
Clay Loam
0.15
434
217
6-18
Heavy
Clay Loam
0.15
434
217
6-18
Light
Silty Clay
								  Loam
0.15
434
217
6-18
Heavy
Silty Clay
								  Loam
0.15
434
217
6-18
Sandy Clay
0.15
434
217
6-18
Silty Clay
0.05
1300
650
6-18
Clay
0.05
1300
650
6-18
Table II -
SETBACK REQUIREMENTS FROM SENSITIVE
						WATER (
Minimum Distance from the Water Edge)
Soil Textural Class
Slope of Less Than 8 Percent
Slope of More Than 8 Percent
Gravel
NOT APPLICABLE
Coarse
Sand
100 feet
100 feet
Medium
Sand
100 feet
100 feet
Fine
Sand
100 feet
100 feet
Loamy Sand
100 feet
100 feet
Sandy Loam
100 feet
100 feet
Light
Loam
50 feet
100 feet
Heavy
Loam
50 feet
100 feet
Silt Loam
50 feet
100 feet
Sandy Clay Loam
50 feet
100 feet
Light
Clay Loam
50 feet
100 feet
Heavy
Clay Loam
50 feet
100 feet
Light
Silty Clay
								  Loam
50 feet
100 feet
Heavy
Silty Clay
50 feet
100 feet
Sandy Clay
100 feet
100 feet
Silty Clay
100 feet
100 feet
Clay
100 feet
100 feet
Table III - Subsurface Drip Irrigation Pump Cycles
						(Minimum Requirements)
Pump Cycles/24 Hours
Gallons Pumped/Bedroom/Cycle
Additional Gallons Pumped Per Person Over 2 Per
								  Bedroom
6
25
12.5
8
18.75
9.375
10
15
7.5
12
12.5
6.25
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.10 - Design Elevated Sand Mound Disposal System

Current through June 25, 2024
1.
					 These guidelines present requisite site characteristics, design criteria, and
					 construction techniques for on-site mound sewage systems. These guidelines
					 provide a systematic approach to mound system design for typical domestic
					 household wastewater. For systems serving other than single family dwellings
					 the designer is cautioned that simple extrapolation of this information
may not
be appropriate.
2. When addressing wastewater flows that
					 differ from a septic tank, such as those characterized by high biological
					 oxygen demand (BOD5), total suspended solids (TSS), or oil and grease, the
					 elevated sand-mound has inherent limitations. Wastewater from non-domestic
					 sources should be evaluated on a case by case basis, to determine the amount of
					 pretreatment necessary to apply to an elevated sand mound. The waste water
					 applied to an elevated sand mound should not exceed 220 mg/l BOD5 or 145 mg/l
					 TSS (no TSS particles should be retained on a 1/8th inch screen).
3. Mounds are an excellent treatment and
					 disposal choice on appropriate sites, but they are not very forgiving. Special
					 attention must be given to siting, design, pre-construction planning, site
					 preparation, filter media selection, construction and maintenance of these
					 systems. Quality control throughout the process cannot be
					 overemphasized.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.11 - General

Current through June 25, 2024
1. Successful function of any on-site system
					 is characterized by a two-fold process: treatment and disposal. The final
					 treatment is accomplished predominately by physical and
					 microbiological/chemical processes within the soil environment. These processes
					 are affected by:
a. wastewater strength and
					 characteristics,
b. soil moisture
					 levels
c. the nature of the
					 receiving soil, and
d. the soil
					 loading rate.
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.12 - Pre-Treatment

Current through June 25, 2024
The preliminary treatment for an elevated sand-mound will
						be either an aerobic treatment unit or a septic tank with an approved filter.
						The pre-treatment method selected shall comply with the applicable sections of
						the Regulation Governing Individual Disposal.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.13 - Pumping Chambers

Current through June 25, 2024
1. The pumping
					 chamber shall have a minimum capacity of 750 gallons or twice the daily flow,
					 whichever is the largest.
2. The
					 pumping chamber shall be equipped with an audible and/or visual high water
					 alarm.
3. The high water alarm must
					 be set to allow a reserve capacity of 50% in the chamber when activated.
4. The pumping chamber shall have
					 a grade level access large enough to allow servicing and/or removal of the
					 largest component in the chamber. Access ports shall be protected against
					 unauthorized entrance or removal.
5. The pumping chamber shall be vented
					 through the grade level access or by means of a separate vent. In either case,
					 the vent shall be equal to or greater than two times the diameter of the inlet
					 port of the pump.
6. The pumping
					 chamber shall be made of material resistant to the corrosive effects of
					 wastewater and designed to withstand the lateral and bearing loads to which it
					 is subjected.
7. All openings shall
					 be sealed with a mastic, butyl rubber, or other pliable sealant that is
					 waterproof, corrosive resistant and approved for use in contact with
					 wastewater, in a manner to prevent the entrance of surface and groundwater.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.14 - Minimum Pump Specifications

Current through June 25, 2024
1. Although timed
					 dosed systems are preferred, an elevated sand mound may utilize either a timed
					 dosed or on-demand dosing cycles. Each dose volume shall not exceed the
					 estimated maximum daily flow divided by the number of dosing cycles.
2. The pump selected must be able to fully
					 charge the distribution system without hydraulically overloading the absorption
					 area.
3. The pump shall be
					 constructed of corrosion resistant materials suitable for effluent pumping.
4. The pump shall be equipped with
					 a low water cutoff to prevent damage to the pump during low water conditions.
5. The pump shall be sized per
					 manufacturers' specifications to meet or exceed the hydraulic head of the
					 system.
6. The pump shall be
					 installed in compliance with the manufacturers' specifications so as not to
					 violate pump warranty.
7. The
					 suction and pressure lines shall be schedule 40 or equal and be sized to meet
					 or exceed the hydraulic head of the system.
Miss Code Ann.
						§
												41-67-3
Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 18 - Division of On-site Wastewater › Subpart 77 - On-site Wastewater Regulations › Chapter 5 - INDIVIDUAL ONSITE WASTEWATER DISPOSAL DESIGN STANDARD › Subchapter 6 - SUBSURFACE DRIP IRRIGATION › Rule 15-18-77-5.6.15 - Distribution System Specifications

Current through June 25, 2024
1. The distribution
					 system in an elevated sand mound shall consists of three components:
a. a pressurized distribution manifold- that
					 shall consist of a small diameter (1"- 1.5") schedule 40 pipe, to receive the
					 effluent from the pump. This pipe shall be connected as to not create any dead
					 ends, and shall have 3/8" holes drilled in it every 36" pointing up. See
					 Figures 2 and 3. The effluent from the pump must come to the center of this
					 distribution manifold and absorption area.
b. field drain pipe to house the pressurized
					 distribution manifold- A 4" field line pipe with the holes pointing down is
					 acceptable. Other field drain pipe designs may be acceptable, but first must go
					 through the experimental protocol.
c. distribution media- -" to 2.5" gravel to a
					 depth of 1' is acceptable. The design of the absorption area must comply with
					 design guidelines for gravel underground absorption. If other distribution
					 media is approved, they must comply with the appropriate regulations and
					 guidelines.
d.
Figure 2: SIDE
					 VIEW OF DISTRIBUTION SYSTEM IN ABSORPTION AREA OF AN ELEVATED SAND
					 MOUND
e.
Figure 3: TOP
					 VIEW OF ABSORPTION AREA WITH DISTRIBUTION NETWORK AND FIELD LINE
					 PIPE.