016.24.06 Ark. Code R. 009

Current through Register Vol. 49, No. 10, October, 2024

Rule 016.24.06-009 - Rules Pertaining to Onsite Wastewater Systems, Designated Representatives and Installers

Section 1. Authority and Purpose

1.1. The following RULES AND REGULATIONS PERTAINING TO ONSITE WASTEWATER SYSTEMS, DESIGNATED REPRESENTATIVES, INSTALLERS AND MANUFACTURERS are duly adopted and promulgated by the Arkansas State Board of Health pursuant to the authority expressly conferred by the laws of the State Arkansas including, without limitation, Act 96 of 1913 (A.C.A. {20-7-l09), and Act 402 of l977 (A.C.A. { 14-236-101, et seq.).

1.2. Purpose: To establish minimum standards for the design and construction of onsite wastewater systems in suitable soils for the renovation of wastewater and the return of the renovated wastewater into the hydrologic cycle.

Section 2. Definitions

2.1.Alternate Onsite Wastewater System. A non-standard individual wastewater treatment or collection system approved by the Department in instances where a standard system is not suitable.

2.2.Approved System. An onsite wastewater system constructed and installed in accordance with the standards and requirements of this Regulation and for which a Permit for Operation has been issued. "Approved system" does not imply that the system will perform satisfactorily for a specific period of time, only that the system has meet the minimum requirements of this Regulation.

2.3.Authorized Agent. The Environmental Health Specialist assigned to the County, or Business Unit by the Department.

2.4.Bedrock. Consolidated rocks such as sandstones, siltstones, and shale, which essentially retain their depositional or tectonic orientation. Fine earth materials shall constitute less than 10% of the materials and no other conditions exist that would provide adequate wastewater renovation. Where bedrock and soil horizons are interlayered, the depth to bedrock shall be the cumulative thickness of the soil layers greater than or equal to four inches in thickness within 72 inches of the soil surface.

2.5.Bedroom. Any room inside a residence intended for the purposes of sleeping quarters.

2.6.Benchmark. A mark made on a stationary object of a determined position and elevation and used as a reference point.

2.7.Community Wastewater System. Any system, whether public or privately owned, serving 2 or more individual lots, for the collection, treatment and disposal of wastewater or industrial wastes of a liquid nature, including various devices for the treatment of such wastewater or industrial wastes.

2.8.Department. The Arkansas Department of Health and Human Services.

2.9.Designated Representative (DR). A person certified by the department to make percolation tests, system designs and inspections subject to the authorized agent's final approval. Designated representatives shall be registered professional engineers, registered land surveyors, licensed master plumbers, registered sanitarians or other similarly qualified individuals holding current certificates from the State of Arkansas, and shall demonstrate to the satisfaction of the authorized agent prior to their designation as a "designated representative" their competency to make percolation tests, designs and final inspections for onsite wastewater systems in accordance with these Rules and Regulations and when authorized by the Authorized Agent.

2.10.Dwelling Unit. A structure intended to be used as a residence. A single structure may contain more than one dwelling unit: e.g., a duplex contains 2 dwelling units.

2.11.Distribution Box. A watertight box that receives the discharge of effluent from the septic tank and distributes the flow of wastewater equally to each absorption trench.

2.12.Distribution Device. A device, approved by the Department, used to distribute or alternate the effluent load between 2 or more locations.

2.13.Domestic Wastewater. All wastes discharging from sanitary conveniences and plumbing fixtures of a domestic nature, exclusive of industrial and commercial wastes.

2.14.Dosing Tank. A tank constructed of concrete, plastic, fiberglass or other approved material that contains one or more pumps or automatic siphons designed to deliver a specified volume of wastewater effluent to the distribution system.

2.15.Emergency Repair. The repair and/or replacement of any part of a malfunctioning onsite wastewater system, excluding the alteration of existing absorption trenches and/or the installation of additional absorption area, that poses an immediate health hazard.

2.16.Engineering. The engineering section of the Arkansas Division of Health.

2.17.Experimental Onsite Wastewater System. A sewage treatment system that is not classified as a standard or alternate onsite wastewater system. Experimental systems may be approved on a case-by-case basis and evaluated under the direction of the Department to determine the effectiveness of the system.

2.18.High-use Area. Any site accessible to the public for the purposes of entertainment, recreation, or gathering.

2.19.High Water Mark. The line which the water impresses on the soil by covering it for sufficient periods of time to deprive it of non-aquatic vegetation or the established maximum flood elevation of lakes with constructed dams.

2.20.Homeowner. A person who owns and occupies a building as his home.

2.21.Hydraulic Conductivity. The rate of water movement under unit gradient in a specific soil horizon.

2.22.Onsite Wastewater System. A single system of treatment tanks and/or renovation facilities used for the treatment of domestic wastewater, exclusive of industrial wastes, serving only a single building, commercial facility such as an office building, or industrial plant or institution.

2.23.Industrial Wastes. Liquid wastes resulting from the processes employed in industrial and commercial establishments.

2.24.Installer. Any person, firm, corporation, association, municipality, or governmental agency licensed by the department, which constructs, installs, alters or repairs onsite wastewater systems for others.

2.25.Interceptor Drain. A subsurface drainline, usually constructed upgrade from the absorption area to divert seasonal groundwater.

2.26.Lake. A considerable body of inland water or an expanded portion of a river generally of appreciable size and too deep to permit vegetation, excluding subaqueous vegetation, to take root completely across the expanse of water.

2.27.Maintenance Personnel. An individual certified by the Department to conduct assessments under the Onsite Maintenance and Monitoring Program.

2.28.Municipality. A city, town, county, district, or other public body created by or pursuant to State law, or any combination thereof, acting cooperatively or jointly.

2.29.Pedon. The smallest classifiable soil units. Pedons are intended to be of a size suitable for field examination, description, and sampling.

2.30.Person. Any institution, public or private corporation, individual, partnership, or other entity.

2.31.Piezometer. A pipe placed in the soil which gives the water pressure at depth. The reading is used to estimate the elevation of a water table.

2.32.Pond. A body of water smaller than a lake, often artificially formed.

2.33.Potable Water. Water free from impurities in amounts sufficient to cause disease or harmful physiological effects with the bacteriological and chemical quality conforming to applicable standards of the Arkansas State Board of Health.

2.34.Primary Absorption Area. The area approved by the Department or it's authorized agent for the installation of an onsite wastewater system for a specified tract of land.

2.35.Professional Soil Classifier (P.S.C.). A person who, by reason of their special knowledge of the physical, chemical, and biological sciences applicable to soils as natural bodies and of the methods and principles of soil classification experience in the formation, morphology, description, and mapping of soils, is qualified to practice soil classifying, and who has been registered by the Arkansas State Board of Registration for Professional Soil Classifiers.

2.36.Property Owner. A person who owns and may or may not occupy the property.

2.37.Property Owners' Association. An association created by and pursuant to State law and organized for the purpose of maintaining common facilities including onsite wastewater facilities in unincorporated subdivisions.

2.38.Redoximorphic Features. Soil features formed by the processes of reduction, oxidation, and translocation of iron and manganese oxides in seasonally saturated and reduced soils.

2.39.Relic Redoximorphic Features. Redoximorphic features that are observed in the soil profile but are not indicative of contemporary seasonal water table levels. Redoximorphic features may not be considered relic unless they meet the guidelines as specified in Section 8.4.1.1 or are evaluated by a monitoring process as specified in Section 8.4.6.

2.40.Restrictive Soil Layer. A soil layer that impedes the movement of water, air or growth of plant roots. Examples of such layers or conditions are traffic pans, claypans, fragipans, compacted soil, bedrock and clayey soil.

2.41.Scum. The accumulated floating material, including grease, oils and other low-density solids in a septic tank.

2.42.Secondary Absorption Area. An alternate location indicated on a lot or plot plan showing where the absorption area is to be placed in the event of failure or necessary replacement of the system located on the primary absorption area.

2.43.Seasonal Water Table (SWT). A zone of soil that become saturated for periods long enough to undergo reducing conditions during periods of climatic stress due to an underlying restrictive layer. The seasonal water table may be classified as brief, moderate, or long.

2.44.Septic Tank. A single tank or series of tanks that receives raw domestic wastewater and serve as the primary treatment unit in an onsite wastewater system. The septic tank provides skimming and storage of scum, settling and storage of the wastewater solids, and the partial digestion of accumulated solids by anaerobic action. Clarified effluent then flows from the septic tank to the absorption area or for further treatment.

2.45.Septic Tank Manufacturer. A person, firm, corporation or association who manufactures septic tanks, package treatment units or other components for onsite wastewater systems.

2.46.Similarly Qualified Individual. A bachelor's degree with 30 hours of natural science, engineering and/or math, or 3 years experience verified by the Department in the design of onsite wastewater systems.

2.47.Sludge. The accumulated solids that have settled to the bottom of a septic tank.

2.48.Soil Absorption System. The system for the final renovation of the septic tank effluent and return of the renovated wastewater to the hydrologic cycle, including the lateral lines, the perforated pipes, the rock or other approved material and the soil absorption trenches.

2.49.Soil Horizon. A layer approximately parallel to the surface of the soil distinguishable from adjacent layers by a distinctive set of properties produced by the soil forming process.

2.50.Soil Pit. An onsite excavation. The excavation shall be of adequate size to observe depth to seasonal water tables, depth to bedrock, or impervious layers. The soil pit is a minimum of 36 inches in width, and dug to provide ease of access such as steps or a moderate slope. The excavation shall be 4 feet in depth unless an impervious layer is encountered and shall provide an exposed sidewall area of at least 3 feet in length. It is used to observe those soil characteristics relevant in determining soil suitability for wastewater absorption and renovation.

2.51.Soil Qualified Designated Representative. A Designated Representative who has successfully passed the soils portion of the D.R. testing procedure, as set forth by the Department. These individuals are certified to size absorption areas based on depth to seasonal water tables.

2.52.Soil Textural Class. The relative proportions by weight of the three mineral fractions sand, silt, and clay as defined by the USDA soil texture classifications

2.53.Stream. A year round flowing stream as designated by the United States Geological Survey.

2.54.Subdivision. Land divided or proposed to be divided for predominantly residential purposes into such parcels as required by local ordinances, or, in the absence of local ordinances, subdivision means any land which is divided or proposed to be divided by a common owner or owners for predominantly residential purposes into 3 or more lots or parcels, platted or unplatted units any of which contains less than three acres, as a part of a uniform plan of development.

2.55.Surface Discharging System. Those systems that apply effluent directly to the soil surface or are sized less than that determined by seasonal water table loading rates as outlined in this regulation.

2.56.True Water Table. The upper surface of a saturated zone within the soil that is directly connected to a regional aquifer.

2.57.Undisturbed Soil. Soil which has developed by the actions of the soil forming processes and which has not been disturbed or altered by the human activities. Exception: plow layers less than 7 inches from the soil surface.

2.58.Valid Permit. A permit for construction is valid for a period of one year from the date of approval and may be deemed invalid by the Authorized Agent before construction if the site and/or soil conditions have changed after approval or the information on the permit is inaccurate.

2.59.Wastewater. Any sewage containing animal or vegetable matter in suspension or solution, including but not limited to liquid wastes from toilets, kitchen sinks, lavatories, washing machines and other plumbing fixtures.

2.60.Wet Season. The period within a year when rainfall normally exceeds evapo-transpiration and a seasonal water table can be expected to be at its highest level in the soil.

Section 3. Variances and Exemptions

3.1. Requested variations from these Rules and Regulations will be considered and may be approved at the sole discretion of the Department.

3.2. Submission of proposed experimental onsite wastewater systems may be approved, disapproved, or approved on a trial basis for a specific period of time. Such approval or disapproval shall be at the sole discretion of the Department. Submission of an experimental design shall include design data as to the efficiency of operation of the proposed experimental system. A monitoring plan shall be submitted for approval in addition to the system design.

3.3. Good management practices. Good management practices are additions or modifications to systems which will make such systems more efficient, or which could make such systems acceptable in certain soil conditions. Where good management practices are proposed for inclusion in a soil absorption system, approval shall be at the discretion of the Department or its Authorized Agent.

3.4. Existing installation. No onsite wastewater system in existence on the effective date of these Rules and Regulations nor any onsite wastewater system installed after the effective date of these Rules and Regulations in a subdivision, wherein individual lots have been developed or sold for use with onsite wastewater systems for which a plat has been filed on record prior to the effective date of these Rules and Regulations shall be required to conform to more stringent specifications and requirements as to design, construction, density of improvements, lot size and installation than those standards contained in any applicable duly adopted and published regulations in effect at the time of platting of record of such subdivisions. No onsite wastewater system to be installed on a residential lot for which the Department or its authorized agent has issued a construction permit on or before the effective date of these Rules and Regulations shall be required to conform to the design, construction and installation provisions of these Rules and Regulations. In a subdivision for which a master plan has been approved by the Department prior to the effective date of these Rules and Regulations or for which the Department has otherwise previously issued its written approval for the installation of onsite wastewater systems and where individual lots have been developed or sold in reliance upon such prior written approval, onsite wastewater systems shall not be required to conform to more stringent specifications as to design, construction and installation than those standards in effect at the time of, or referred to, in such prior written approval. However, it is provided, that any onsite wastewater system which is determined by the Department to be a health hazard or which constitutes a nuisance due to odor or unsightly appearance must conform to the provisions of these Rules and Regulations within 30 working days after notification that such determination has been made.

Section 4. Sewer Connection

4.1. All premises shall be connected to a sanitary sewer when within 300 feet and available to said premises when connection can be made without crossing another person's property. No privies, onsite wastewater systems or other receptacles for human excreta shall be constructed, maintained, or used on the premises. Plumbing fixtures shall be installed and maintained in accordance with the ARKANSAS STATE PLUMBING CODE. (See Ark. Stat. Ann. 19-4125-4127.)

4.2. When connection to an existing sanitary sewer system is not feasible and a large number of residences are to be built in an area, consideration should be given to the construction of a community sewer system and treatment plant. However, since an improperly operated or inadequately staffed community wastewater treatment plant cannot effectively treat wastewater, consideration should be given to the size of the proposed system to ensure that economically feasible sewer rates are sufficient to ensure proper treatment plant operation. As an aid to developers and engineers, the following information is offered to determine the feasibility of a public sewer system or onsite wastewater system.

Population Density	Equivalent Lot Size	Service Economic Justification
Over 5,000 persons per sq. mi.	Less than 1/2 acre	Public sewerage is justified
2,500-5,000 persons per sq. mi.	1/2 to 1 acre	Public sewerage normally is justified
1,000-2,500 persons per sq. mi.	1 to 2 acres	Public sewerage normally is not justified
less than 1,000 persons per sq. mi.	Over 2 acres	Public sewerage rarely is justified

Section 5. Permitting Requirements

5.1. A completed Onsite Wastewater System Permit Application and detailed plans and specifications following the requirements found in Appendix H for the collection, treatment and/or renovation facilities for all wastes of a domestic nature, containing a predominance of human excreta and exclusive of industrial wastes shall be submitted to and receive the approval of the Arkansas Division of Health or its authorized agent, prior to construction of a building or residence.

5.2. Onsite wastewater systems in subdivisions or in platted or unplatted lots or tracts of land as provided in Act 402, must be planned, designed and constructed in accordance with the RULES AND REGULATIONS PERTAINING TO GENERAL SANITATION and the RULES AND REGULATIONS PERTAINING TO ONSITE WASTEWATER SYSTEMS,

DESIGNATED REPRESENTATIVES AND INSTALLERS of the Arkansas Division of Health. Permits for construction and operation of onsite wastewater systems must be obtained in accordance with the RULES AND REGULATIONS PERTAINING TO ONSITE WASTEWATER SYSTEMS, DESIGNATED REPRESENTATIVES AND INSTALLERS prior to the construction, installation or modification of the Onsite Wastewater System.

5.3. Permit requirement. It shall be unlawful for any person, firm, corporation, association, municipality or governmental agency to begin construction, alteration, repair or extension of any onsite wastewater system, owned by any other person, firm, corporation, association, municipality or governmental agency until the owner first obtains a valid Permit for Construction issued by the Department or its authorized agent.

5.4. It shall be unlawful for any person, firm, corporation, association, municipality or governmental agency to begin operation of any onsite wastewater system until such system has been inspected and approved by the Department or its authorized agent and the owner has first obtained a Permit for Operation issued by the Department or its authorized agent.

5.5. It shall be unlawful for any installer to begin construction, alteration, repair or extension of any onsite wastewater system owned by any other person, firm, corporation, association, municipality or governmental agency until the permit holder or installer first notifies the authorized agent a minimum 24 hours prior to the date he plans to begin work on said system. Emergency repairs may be undertaken without prior notification to the authorized agent provided a permit is obtained within ten working days.

5.6. To those cities or counties with authorized agents, the authorized agent shall be the authorized agent of the Department. In the event that an authorized agent has not been designated for a city or county, applications for onsite wastewater systems shall be made to the Department. Application forms and instructions may be obtained from the authorized agent or from the Department.

5.7. Plan review fee. A fee shall be levied for the review of each permit. Permit fees shall be made payable to the Department. The review fee must be paid before the issuance of Part 1 of the Permit Application. There shall be no refund of the fee or any part thereof due to failure to proceed under the Permit Application. Construction must begin within one year of issuance or the permit must be re-validated by the Department or its authorized agent.

5.7.1. A fee shall be levied for the review of individual sewage disposal permit applications as follows:

5.7.1.1. For structures one thousand five hundred square feet (1,500 sq. ft.) or less, the fee to review a permit application is thirty dollars ($30.00):

5.7.1.2. For structures more than one thousand five hundred square feet (1,500 sq. ft.) and up to two thousand square feet (2,000 sq. ft.), the fee to review a permit application is forty-five dollars ($45.00);

5.7.1.3. For structures more than two thousand square feet (2,000 sq. ft.) and up to three thousand square feet (3,000 sq. ft.), the fee to review a permit application is ninety dollars ($90.00);

5.7.1.4. For structures more than three thousand square feet (3,000 sq. ft.) and up to four thousand square feet (4,000 sq. ft.), the fee to review a permit application is one hundred twenty dollars ($120.00):

5.7.1.5. For structures more than four thousand square feet (4,000 sq. ft.), the fee to review a permit application is one hundred fifty dollars ($150.00), and

5.7.1.6. For the alteration, repair or extension of any individual sewage disposal system, the fee to review a permit application is fifty dollars ($50.00).

5.7.2. In calculating the square footage of a residential structure for purposes of determining the applicable fee under this section, the square footage of all auxiliary areas of the residential structure shall not be considered.

5.7.2.1. Auxiliary areas include garages, carports, porches, and other similar areas as determined by the Division of Environmental Health Protection of the Department of Health and Human Services.

5.8. Permit Procedure

5.8.1. Part I of the Permit is the Permit for Construction. Part I of the Permit Application form must be completed by a Designated Representative and approved by the Department or its authorized agent prior to initiating construction. The information to be reported in this portion includes the results of the percolation test, soil determination results, lot dimensions, system design, system layout and other information required by the Department or its authorized agent. NO CHANGES OR ALTERATIONS MAY BE MADE TO THE SYSTEM PRIOR TO OR DURING CONSTRUCTION WITHOUT PRIOR APPROVAL OF THE AUTHORIZED AGENT.

5.8.2. Part II of the Permit Application is the installation inspection. An installation inspection may be made during the construction of any onsite wastewater system. The inspection may be made during any phase of the installation.

5.8.2.1. It shall be the duty of the holder of the Permit for Construction or the installer to notify the authorized agent or Designated Representative, when the installation is ready for inspection. It shall be the duty of the owner or occupant of the property to give the Department, its authorized agent or designated representative, free access to the property at reasonable times for the purpose of making the installation inspection. The installation shall not be covered without approval from the authorized agent.

5.8.2.2. The inspection may be made by the authorized agent, or may be made by the designated representative at the approval of the authorized agent.

5.8.2.3. In the event an inspection is not made 2 working days from the date of notification to the Division of Health, its authorized agent or designated representative, that the installation is completed and ready for inspection, elevation shots will be recorded and the system shall be deemed approved. 5.8.2.4. Any person aggrieved by the disapproval of an onsite wastewater system installation shall be afforded review as provided in Act 434 of 1967, the ARKANSAS ADMINISTRATIVE PROCEDURE ACT.

5.8.3. PART III of the PERMIT is the PERMIT FOR OPERATION. After approval of the inspection, the authorized agent will approve and issue a PERMIT FOR OPERATION. The system shall not be used until the PERMIT FOR OPERATION is issued. The authorized agent will retain the original and return the remaining copies to the owner.

5.8.4. Refusal of permit. Except as provided in Section 3.4, a PERMIT for the construction, alteration, repair, extension or operation of an onsite wastewater system or alternate/experimental system shall be refused where public sewer systems are reasonably available or economically feasible, or in instances where the issuance of such PERMIT is in conflict with the other applicable laws and regulations or where the issuance of such permit is in conflict with the public policy declared in Act 402 of 1977 as amended, except that emergency repairs may be undertaken without prior issuance of a PERMIT, provided a PERMIT is subsequently obtained within 10 working days after the repairs are made.

5.9. Subdivision Review

5.9.1. All subdivision plans which are proposed to utilize onsite wastewater systems as a method of wastewater treatment for all or part of the lots or tracts in said subdivision shall be submitted to the Arkansas Division of Health for review and approval of the overall plan for the utilization of onsite wastewater systems. The procedure for subdivision review and approval shall be as follows:

5.9.2. Submission shall be made to the Local County Health Unit and shall include data on soil pits, percolation tests (if applicable), respective test location, location of nearest public or community sewer system, details as to topography and information as to the present and future land use of the subdivision and of adjoining lands, and such other information as may be required for the review. The Department will establish guidelines on subdivision plan submission and review policies. These guidelines will be updated periodically as necessary.

5.9.3. The Department shall review the submission to determine if onsite wastewater systems or alternate systems could effectively treat wastewater for the subdivision. Should the Department find the subdivision acceptable for onsite wastewater systems, prior to final approval it shall refer the submission to Engineering for their comments and recommendations with respect to the advisability and feasibility of a community sewer system and treatment plant or connection to a public sewer system. After receipt of comments and recommendations from Engineering, the Department shall approve or disapprove the submission and if disapproved, shall refer the applicant to Engineering for information, review and approval as to a community sewer system and treatment plant or connection to a public sewer.

5.9.4. The plan review fee will be a minimum of one hundred ($100.00) for one (1) lot and twenty-five dollars ($25.00) for each following lot, with a maximum of one thousand five hundred dollars ($1,500).

5.9.5. The following items will be included in all subdivision plans:

5.9.5.1. Vicinity map and legal description indicating the location of the subdivision

5.9.5.2. Layout of lot boundaries, streets, easements, all topographical features, and flood level of the area.

5.9.5.3. The corners of both the primary and secondary absorption areas must be sized and flagged on each lot and indicated on the plans.

5.9.5.4. Contour lines at 5 to 20 feet intervals shall be shown as relating to lot boundaries and the location of test performed.

5.9.5.5. Subdivision with wells will show proposed well location for each lot.

5.9.5.6. Features that may affect the location of the subsurface onsite wastewater systems should be identified. These include but are not limited to streams, existing wells, pipelines (oil, gas or water), power lines, topographic features, etc.

5.9.5.7. All lots will be designed for 3 bedroom residences unless otherwise indicated.

5.9.5.8. Subdivisions with Public Water Facilities require detailed engineering plans and specification for the water systems submitted by an engineer licensed in the State of Arkansas to the Engineering Section of the Arkansas Division of Health.

5.9.5.9. Addresses of all parties to receive copies of the subdivision.

5.9.5.10. Three (3) copies of the plans are required.

5.9.5.11. Flood level determination.

5.10. No surface discharging systems shall be allowed in subdivisions.

5.11. Primary and secondary absorption areas in a subdivision shall be sized according to natural soil conditions. Capping fill may be used to overcome separation to bedrock; however, no reduction in loading rate shall be granted for the purpose of determining minimum lot size. On lots proposed for subdivision development, all undisturbed soils shall have a minimum depth of 13 inches or greater to a brief seasonal water table, and/or a depth of 18 inches or greater to an adjusted moderate seasonal water table, and/or a depth of 24 inches or greater to an adjusted long seasonal water table. Good management practices shall not be used for the purpose of determining minimum lot size.

5.11.1. Submission shall be made to the Local County Health Unit utilizing one of the following approved methods:

5.11.2. Subdivision Review and Soils Mapping

5.11.2.1. When utilizing soil mapping for subdivision review, the soil map shall be submitted by a Professional Soil Classifier. When soil mapping a subdivision for the purpose of designing subsurface onsite wastewater systems, a high intensity map is required. A high intensity map details the location and extent of the soils and landscape features sufficiently for site evaluation for subsurface wastewater renovation. The final report consists of a soils map and a soils report.

5.11.2.2. Field procedures for Mapping Subdivisions

5.11.2.2.1. Soil maps for subdivisions are to be made from a maximum grid of 100 feet. Grid points must be accurately located and identified using flags or stakes. A soil pit must be located at each grid point and identified with the corresponding flag or stake. The maximum distance allowed from a property line to an outside perimeter grid line is 50 feet.

5.11.2.2.2. The corners of both the proposed primary and secondary absorption areas must be sized and flagged on each lot.

5.11.2.2.3. A soil description must be made from each soil pit in accordance with the National Cooperative Soil Survey.

5.11.2.3. The Soil Map

5.11.2.3.1. The soil map should be compiled at a scale of 1 inch = 100 feet (1: 1,200).

5.11.2.3.2. The soil map must show all map units. A map unit is a collection of areas defined and named the same in terms of their soil properties. Each map unit differs in some respect from all others and is uniquely identified on a soil map. Each individual area on the map is a delineation. Areas consisting of 625 square feet or more shall be delineated. Areas consisting of less than 625 square feet are inclusions and must be identified in the map unit description. Soil map units are to be named by their numerical ranking with respect to the soil loading rates designated for each map unit. Example: The unit with the highest loading rate for subsurface wastewater renovation will be named Map Unit 1.

5.11.2.3.3. When a soil pit is not located with the absorption areas, the primary and secondary absorption areas will be sized according to the most limiting loading rate from the range within the applicable map unit. Within a map unit, the absorption areas can be moved outside the designated primary and secondary areas without additional soils information by utilizing the most limiting loading rate or further soil evaluation in the specific area being proposed must be conducted.

5.11.2.3.4. The Legend must identify all symbols used on the soil map.

5.11.2.3.5. A signed statement must be on the soil map certifying the map was made in accordance with the current National Soil Survey Standards by a Registered Professional Soil Classifier Licensed in Arkansas.

5.11.2.3.6. The following statement must be on all soil maps. Any modification such as cutting, filling or compaction of the soil may change the nature of the soils, and may alter the suitability of the soils for the intended use and will therefore void the soil map.

5.11.2.4. The Soils Report

5.11.2.4.1. The soils report is a separate document that must be submitted as an attachment to the soil map. The report should consist of the following.

5.11.2.4.2. Each map unit identified on the soils map must have a typical pedon description. Terms used in the description must be those used by the National Cooperative Soil Survey.

5.11.2.4.3. The range in characteristics for each soil map unit must be given. The characteristics must include but are not limited to color, texture, redoximorphic features and depth to bedrock. Ranges should be narrow enough that interpretations will not be different for soils with the same typical pedon.

5.11.2.4.4. Interpretations for each typical pedon must be included in the soils report. The minimum interpretations required include: seasonal water table duration, hydraulic conductivity classes, depth to bedrock and the range of soil loading rate.

5.11.2.4.5. A signed statement must be on the soils report certifying the report was made in accordance with the current National Soil Survey Standards by a Registered Professional Soil Classifier.

5.11.3. Sizing based on Seasonal Water Table loading rates without Soil Mapping

5.11.3.1. Designative Representatives utilizing soil morphology method must be soil certified. The following information or items must be included.

5.11.3.2. A minimum of one soil pit in both the primary absorption and secondary absorption area is required. Soil pit information must include depth to rock, impermeable soil layers and seasonal water tables.

5.11.3.3. Loading rates used to size primary and secondary sites must be given.

5.11.3.4. The corners of both the proposed primary and secondary absorption areas must be sized and flagged on each lot.

5.11.4. Sizing based on Percolation Test Data

5.11.4.1. A minimum of one soil pit in both the primary absorption and secondary absorption area is required. Soil pit information will include information of depth to rock, impermeable soil layers, and estimated depths to seasonal water tables.

5.11.4.2. If the soil is considered acceptable based on the information above, a minimum of one percolation hole in both the primary and secondary absorption areas is required.

5.11.4.3. Percolation rates used to size the primary and secondary site must be given.

5.11.4.4. Lots sized using percolation test data must not be smaller than that required by seasonal water table loading rates.

5.11.4.5. The corners of both the proposed primary and secondary absorption areas must be sized and flagged on each lot.

5.11.5. Construction of any type shall not begin upon any lot in the subdivision until final approval of the submission for utilization of an onsite wastewater systems within the subdivision has been made by the Department.

5.11.6. Property Owners' Associations that construct and maintain or have constructed and maintained wastewater treatment facilities in accordance with standards and regulations established by the Arkansas Department of Health and Human Services or the Arkansas Department of Environmental Quality and that desire to exercise general supervision and authority over the treatment of wastewater within and for the subdivided area over which their authority extends, may request the Department or in the case of onsite wastewater systems, or Engineering, in the case of community wastewater treatment systems, to delegate such parts of its authority as the Property Owners' Association wishes to exercise. The Department may, at its discretion, delegate any of its authority in the administration of these Rules and Regulations as it shall deem proper and in accordance with the following.

5.11.6.1. In the event, that such Property Owners' Association constructs and maintains all onsite wastewater systems within the subdivided area over which their authority extends, the Department, after determining by the procedure set forth in Section 5.9 that the use of the onsite wastewater systems within the subdivision is acceptable, may, at its discretion, delegate the Property Owners' Association general supervision and authority over the location, design, construction, installation and operation of onsite wastewater systems subject, however, to compliance with these Rules and Regulations and to the use of the permit forms established under these Rules and Regulations and to the final approval of each permit by the authorized agent of the Department.

5.11.6.2. In the event that such Property Owners' Association constructs and maintains all community wastewater treatment systems within the subdivided area over which their authority extends, Engineering may, at its discretion, delegate general supervision and authority over the location, design, construction, installation and operation of such community wastewater treatment systems subject to compliance with applicable Rules and Regulations of the Division of Health and of the Arkansas Department of Environmental Quality, and subject to final approval of designs and issuance of permits as required by said applicable Rules and Regulations. Such compliance shall be to the same degree and extent as would apply if the Property Owners Association were a municipality.

Section 6. System Location

6.1. These distances shall be used only where ideal conditions indicate them to be sufficient, and greater distance shall be required where local conditions demand. All waivers except with public water supplies involved must be submitted to and approved by the Department. Waivers affecting public water supplies must be submitted to and approved by Engineering. Details pertaining to local water wells, such as depth, type of construction, vertical zone of influence, etc., together with data on the geological formations and porosity of subsoil strata, should be considered in determining the safe allowable distance between wells and subsurface onsite wastewater systems.

6.2. Minimum Horizontal Distances.

6.2.1. All facilities used for the collection, treatment, and renovation of wastewater must be at least 300 feet from the high water mark of any body of water, if within one quarter mile of a public water supply intake on that body of water.

6.2.2. All facilities used for the collection, treatment, and renovation of wastewater must be at least 300 feet from any spring used as a public water supply.

6.2.3. All facilities used for the collection, treatment, and renovation of wastewater must be at least 100 feet from any source of domestic water supply.

6.2.4. All facilities used for the collection, treatment, and renovation of wastewater must be at least 100 feet from the high water mark of any stream or lake.

6.2.5. All facilities used for the collection, treatment, and renovation of wastewater must be at least 50 feet from any pond on the same property and 100 feet from any pond on adjacent properties.

6.2.6. All facilities used for the collection, treatment, and renovation of wastewater must be at least 10 feet from any dwelling or building.

6.2.7. All facilities used for the collection, treatment, and renovation of wastewater must be at least 10 feet from all property lines.

6.2.8. All facilities used for the collection, treatment, and renovation of wastewater must be at least 10 feet from any water service line.

6.2.9. Provided that the tank is water-tight, tested on site, and approved by the Department, a variance may be granted for tank locations that do not meet the above listed minimum horizontal distance separations.

Section 7. Minimum Lot Size

7.1. For the purpose of determining minimum lot size, all lots must have suitable primary and secondary absorption areas, sized according to natural soil data. Good management practices shall not be used for the purpose of determining minimum lot size. However, in no case shall a wastewater system utilizing subsurface renovation be approved regardless of lot size if soils are not suitable for subsurface renovation.

7.2. If an individual water well supply and an onsite wastewater system is proposed, the lot size must be such that the well may be located at least 50 feet from any lot line, and at least 100 feet from any part of the wastewater absorption area proposed on the same lot and wastewater absorption areas proposed on any adjacent lots. Wells should be located up slope from wastewater systems if possible. Both primary and secondary wastewater absorption areas shall conform to all set back requirements established under Section 6.2 of this regulation.

7.3. If a public water supply is proposed and an onsite wastewater system is to be used, the lot size must be such that a primary absorption area and a secondary absorption area are present. Both absorption areas must conform to the set back requirements outlined in Section 6.2 of this regulation.

Section 8. Soil Criteria

8.1. The first step in the design of any onsite wastewater system is to determine the suitability of the soil. A minimum of 2 soil pits is required to determine the suitability of a site. One pit must be in the area of the proposed primary absorption area and one pit must be in the area of the proposed secondary absorption area. The soil pits must be left open for use by the authorized agent. Depths to seasonal water tables, bedrock (if encountered), and the type and depth of the various soil layers including both pervious and impervious strata and their relationship with the proposed soil absorption system's other impervious strata shall be reported.

8.2. Soil Separation Distances

The following are minimum soil separation distances from the bottom of the proposed absorption trench to the true water table (aquifer) and bedrock. These conditions must be met before the soil is considered suitable for subsurface renovation.

8.2.1.	True Water Tables
	Moderate Hydraulic Conductivity High Hydraulic Conductivity	24 inches 36 inches
8.2.2.	Bedrock
	Moderate Hydraulic Conductivity with redoximorphic features indicating	18 inches

SWT of moderate duration or longer
Moderate Hydraulic Conductivity with no redoximorphic features or redoximorphic features indicating a brief SWT	24 inches
High Hydraulic Conductivity	36 inches

8.3. Hydraulic Conductivity Classes

The hydraulic conductivity class may be estimated using the following.

8.3.1. High hydraulic conductivity. Natural soil horizons which have not been compacted by human activities, especially vehicle traffic and tillage operations, and are in the following particle size classes

Sandy. The texture of the fine earth is sand or loamy sand but not loamy very fine sand; very fine sand with rock fragments making up less than 35% of the volume.

Fragmental. Stones, cobbles, gravel, and very coarse sand particles; too little fine earth to fill some of the interstices larger than 1 millimeter.

Sandy-skeletal. Rock fragments 2 millimeters in diameter or larger make up 35% or more by volume; enough fine earth to fill interstices larger than 1 millimeter; the fraction finer than 2 millimeters is sandy as defined for the sandy particle size class.

8.3.2. Moderate hydraulic conductivity. Natural soil horizons which clearly have some soil structure other than platy, which have not been compacted by human activities, especially vehicle traffic and tillage operations, and which are in one or more of the following particle size classes Loamy. The texture of the fine earth is loamy very fine sand, or finer, but the amount of clay is less than 35%; rock fragments are less than 35% by volume.

Loamy-skeletal. Rock fragments make up 35% or more by volume; enough fine earth to fill voids larger than 2 millimeters; the fraction finer than 2 millimeters is loamy as defined for the loamy particle size class.

8.3.3. Low hydraulic conductivity. Included are all soil horizons which have platy structure, or (clearly) fraigipan horizons or horizons which have been compacted by the human activities, especially vehicle traffic and tillage operations. Also included are horizons with the following particle size classes:

Clayey. The fine earth contains 35% or more clay and rock fragments are less than 35% by volume.

Clayey-skeletal. Rock fragments make up 35% or more by volume; enough fine earth to fill voids larger than 1 millimeter; the fraction finer than 2 millimeters is clayey as defined for the clayey particle size class.

8.4. Seasonal Water Table (SWT) Classes

The depth to seasonal water tables of 3 durations can be estimated from the following guides. The guides are interpretations of redoximorphic features, a type of soil morphology which results from reduction-oxidation processes. All colors are for moist conditions. Place each horizon in the most limiting class in which it will fit.

The placing of soil horizons into SWT classes based on redoximorphic features is an interpretation and requires some understanding of soil development processes. Redoximorphic features are not expected to occur unless the horizon has been both saturated and reduced. Reduction is not expected to occur until after the horizon has been saturated for some period of time.

8.4.1. Horizons with dissimilar color patterns on ped surfaces and ped interiors

8.4.1.1. Brief: Soil horizons which have seasonal water tables of brief duration contain one or more of the following.

Concentrations or depletions on ped surfaces with chroma > 3, not greater than 50% or more chroma 3 on ped surfaces.

Manganese masses on 2% or more of the ped surface

Iron or manganese nodules or concretions 2 millimeters in diameter or larger

Note: Iron/Manganese nodules or concretions with clear to sharp boundaries and the absence of iron/manganese accumulations on the surface of the nodule or concretion are not indicative of contemporary seasonal water table levels.

8.4.1.2. Moderate: Soil horizons which have seasonal water tables of moderate duration contain one or more of the following.

Some chroma < 2 on ped surfaces

50% or more chroma 3 on ped surfaces

35 to 49% clay

8.4.1.3. Long: Soil horizons which have seasonal water tables of long duration contain one or more of the following.

Chroma < 2 on 70% or more of the ped surfaces

Chroma < 2 on 50% or more of the ped surfaces with some chroma of 2 or less in ped interiors

50% or more clay

8.4.2. Horizons with similar color patterns on ped surfaces and ped interiors and horizons without peds

8.4.2.1. Brief: Soil horizons which have seasonal water tables of brief duration contain one or more of the following

Concentrations or depletions with chroma < 3, not greater than 20% chroma 3 Iron or manganese nodules or concretions 2 millimeters in diameter or larger

8.4.2.2. Moderate: Soil horizons which have seasonal water tables of moderate duration contain one or more of the following.

Chroma < 2 on less than 50% of the mass

Chroma 3 in more than 20% of the mass

35 to 49% clay

8.4.2.3. Long: Soil horizons which have seasonal water tables of long duration contain one or more of the following.

Chroma <; 2 in 50% or more of the mass

50% or more clay

8.4.3. Soil horizons that have chroma and value of < 3 due to high organic matter contents (A horizons) present problems for SWT interpretations. Also uncoated grains which result from prolonged leaching with organic acids (E horizons) are not considered to be an indication of a SWT. These horizons (A and E) shall be considered to contain SWT's only if they also contain high or low chroma colors. A plowed horizon (Ap), which has chroma of 3 or less, shall not be considered to contain an SWT unless the first underlying horizon contains an SWT. The duration of the SWT in a plowed horizon (Ap) with chroma < 3 and in A and E horizons with chroma < 3 and high or low chroma colors shall be the same as in the first underlying horizon.

8.4.4. Soils with 35% or more clay that are low or moderate shrink-swell, with a hue of 5YR or redder typically formed over sandstone, siltstone, limestone, and chert may have higher hydraulic conductivities and seasonal water tables of shorter duration than indicated by the above characteristics. These soils will be considered moderate hydraulic conductivity and sized according to redoximorphic features. Alluvial soils such as those deposited by the Arkansas and Red Rivers and soils formed from shale are high shrink-swell and are not included in this exception.

8.4.5. Some soils may exhibit redoximorphic features that are not indicative of current soil conditions. In such soils, monitoring wells or piezometers may be necessary to determine current soil wetness conditions. Monitoring must be done during the wet season.

8.4.6. Monitoring Requirements

8.4.6.1. A property owner or their representative has the option to use observation wells and/or piezometers to demonstrate that redoximorphic features are not an indication of zones of saturation. The following procedures for the use of observations wells/piezometers to determine the depth and duration of seasonal water tables shall be implemented.

8.4.6.2. The property owner or their representative shall notify the Department, in writing, of the intent to use observation wells and/or piezometers to determine the seasonal water tables.

8.4.6.3. On individual lots at least 3 observation wells and/or piezometers shall be installed and monitored on a site within both the proposed primary and secondary absorption areas. I f in the judgment of the Department, more than 3 are needed, the property owner or their representative shall be notified. For subdivision evaluation, piezometers shall be located on one hundred (100) feet intervals in a grid pattern.

8.4.6.4. The wells and/or piezometers shall extend at least 60 inches into the natural soil. The Department reserves the right to determine the depth of all well and/or piezometers.

8.4.6.5. All plans and specifications for observation wells/piezometers shall be submitted and installed under the supervision of a Professional Soil Classifier. NOTE: I ndividuals submitting monitoring plans must have demonstrable training and/or experience in monitoring of seasonal water tables.

8.4.6.6. Monitoring of seasonal water tables shall be conducted by a Professional Soil Classifier or Designated Representative.

8.4.6.7. Under no circumstances will the property owner/developer be allowed to monitor the water levels.

8.4.6.8. The monitoring period is from December 1^st through May 15^th of the following year to verify the depth and duration of the seasonal water tables during years of normal precipitation for this time period. Depending on when peaks are observed, the Department may or may not accept the monitoring for the time period. A near normal reporting period is defined as a period that has plus or minus one standard deviation of the long term mean annual precipitation. (Long term refers to 30 or more years.) Also, the mean monthly precipitation during a normal period must be plus or minus one standard deviation of the long-term monthly precipitation for 8 of the 12 months. For the most part, normal years can be calculated from the mean annual precipitation.

8.4.6.9. The Department shall field check the monitoring periodically during the time of expected saturated soil conditions at its discretion.

8.4.6.10. The Department may, at any time during the observation period, verify the observed water depth by conducting a soil boring next to, and of equal depth with, any of the observation wells/piezometers. The well may be declared invalid by the Department if the water level after 24 hours without precipitation, presents a discrepancy with the observed water level in the data collected. The owner will be notified by the Department of such findings.

8.4.6.11. When monitoring determines that the site is suitable, the Department will request that a new site evaluation be submitted. The monitoring information must be incorporated into the new site evaluation.

8.4.6.12. Some soils have been extensively studied and have no contemporary seasonal water tables. These specific areas may be exempted from the soil redoximorphic features but must be sized by Hydraulic Conductivity or percolation rates. Only specific areas recognized by the Department may be exempted without the monitoring requirements outlined in this regulation.

8.4.7. Lowering Seasonal Water Tables

8.4.7.1. Interceptor Drains. Interceptor drains can be utilized to lower or eliminate the brief seasonal water table on sites with 3% or more slope in portions of the soil that have moderate or high hydraulic conductivity. Approval of any reduction in seasonal water table depth is at the sole discretion of the Department or its authorized agent.

8.4.7.2. Capping Fill. The depth of the observed seasonal water table may be increased by a factor equal to half the depth of the settled fill up to a maximum adjustment of 7 inches. Capping fills are outlined in Section 9.7 of this regulation. Systems incorporating capping fills shall be designed to load to the surface of the settled cap in order to utilize the adjustment credited for the applied cap.

8.5. On lots less than 3 acres, prior to adjustment for capping fill, where the slope is less than or equal to 12%, all undisturbed soils exhibiting a depth of 13 inches or greater to a brief seasonal water table, and/or a depth of 18 inches or greater to an adjusted moderate seasonal water table, and/or a depth of 24 inches or greater to an adjusted long seasonal water table must utilize a subsurface onsite wastewater systems as outlined in this regulation.

8.6. On lots of 3 acres or greater, prior to adjustment for the capping fill, all undisturbed soils exhibiting a depth of 12 inches or greater to a brief seasonal water table, and/or a depth of 16 inches or greater to an adjusted moderate seasonal water table, and/or a depth of 20 inches or greater to an adjusted long seasonal water table must utilize a subsurface onsite wastewater systems as outlined in this section.

Section 9. Standard Systems

9.1. A standard onsite wastewater system consists of a field of perforated pipe surrounded by gravel, or other product approved by the Department and installed in such a manner that the clarified effluent from the septic tank or pretreatment unit will be distributed with reasonable uniformity into the natural soil. The individual absorption trench should not be more than 60 feet long, with a maximum length of 100 feet, and the trench bottom and perforated pipe or gravel substitute should be installed at a grade of 0 to 2 inches per 100 feet. In order to ensure even distribution of the effluent, all onsite wastewater systems utilizing a distribution box must have absorption trenches of the same length. Onsite wastewater systems utilizing serial distribution of the effluent must be provided with an approved diversion device to allow drying of the most used absorption trenches. The most used absorption trench should be allowed to drain and dry out during the summer months. In all cases, a minimum of 2 absorption trenches is required to ensure that the absorption area will function even if one absorption trench is disturbed.

9.2. Many different designs may be used in laying out absorption trenches. The choice may depend on the size and shape of the available absorption area, the area required, and the topography of the absorption area. In all cases, the septic tank flow line must be at or above the ground elevation of the highest trench.

9.3. Soil absorption areas utilizing pipe and gravel provide for a trench 24 inches wide, with a standard trench depth of 18 inches from the bottom of the trench to the finished settled grade. Systems designed with trench depths up to 24 inches may be utilized. There shall be a minimum of 6 inches of gravel below the pipe and a minimum of 2 inches of gravel above the pipe. A minimum of 6 inches of cover is required above the gravel bed or gravel substitute. The trench depth may vary in those instances where the soil absorption area was designed to overcome limiting soil characteristics. Trench depths must be specifically called for in the Designated Representative's design and approved by the authorized agent. The absorption area in square feet is twice the total length of the trenches. The minimum spacing between the trenches shall be 6 feet between the trenches and 8 feet center to center. Increased separation between trenches is encouraged to enhance the effectiveness of the trenching system.

9.4. All gravel substitute products approved by the Department must be a minimum of 8 inches in height and may not exceed 24 inches in width. The D.R. must specify the product name and model to be installed when utilizing a gravel substitute in the system design.

9.5. Sizing the Absorption Area

If the soil is acceptable for the installation of subsurface absorption trenches, a percolation test or a seasonal water table determination shall be made at points selected as typical of the area in which the absorption trenches will be located. Only a Soil Qualified Designated Representative may design subsurface absorption systems based on seasonal water table data.

9.5.1. Sizing the system based on Seasonal Water Table Data

When a seasonal water table of more than one duration is present in a soil, the loading rate is determined as follows.

Determine the depth of each seasonal water table.

Adjusting the moderate seasonal water table:

Subtract the depth to the brief SWT from the depth to the moderate SWT and divide by 3;

Subtract the result from the depth to the moderate SWT to obtain the adjusted moderate SWT.

Adjusting the long seasonal water table:

Subtract the adjusted moderate SWT from the depth to the long SWT and divide by 2;

Subtract the above number from the depth to the long SWT to obtain the adjusted long SWT;

Adjusting the long seasonal water table where only brief and long seasonal water tables are encountered:

Subtract the depth to the brief SWT from the long SWT and divided by 6;

Subtract the above number from the depth to the long SWT to obtain the adjusted long SWT.

Compare the loading rates for the brief, adjusted moderate and adjusted long duration seasonal water table using the soil loading charts.

Use the most restrictive loading rate to determine the size of the absorption area.

Soils that only have one duration of seasonal water table are loaded by using the loading rate given in the soil loading charts for the duration of seasonal water table observed.

9.5.2. Sizing the soil absorption area based on Percolation Data

9.5.2.1. Procedures of percolation tests

9.5.2.1.1. Number and location of tests. Three (3) or more test holes spaced uniformly over the primary absorption area and one (1) test hole in the secondary absorption area are required. Percolation tests shall be performed at the depth of the proposed soil absorption system.

9.5.2.1.2. Type of test holes. The depth of a standard percolation test hole is 18 inches and the diameter may be from 4 to 12 inches. If soil and site characteristics indicate that a deeper or shallower system is desired, then the percolation test shall be run at the depth of the bottom of the proposed absorption trench.

9.5.2.1.3. Preparation of test holes. Carefully scratch the bottom and sides of the holes with a knife blade or sharp-pointed instrument, in order to remove any smeared soil surfaces and to provide a natural soil interface into which water may percolate. Remove all loose material from the holes. Add 2 inches of coarse sand or fine gravel to protect the bottom from scouring and sediment.

9.5.2.1.4. Saturation and swelling of the soil. It is important to distinguish between saturation and swelling. Saturation means that the void spaces between soil particles are full of water. This can be accomplished in a short period of time. Swelling is caused by intrusion of water into the individual soil particles. This is a slow process, especially in clay-type soil, and is the reason for requiring a prolonged soaking period. To conduct the test, carefully fill the holes with clear water to a minimum depth of 12 inches above the gravel and maintain at this level for 24 hours, preferably overnight. This may be achieved by the use of an automatic siphon. This procedure is to ensure that the soil is given time to swell and to approach the condition it will be in during wet seasons of the year.

9.5.2.1.5. After the saturation period, adjust the depth of water in the holes to 6 inches above the gravel. From a fixed reference point, measure the drop in water level at the end of a 30-minute period, refilling 6 inches above the gravel as necessary. The drop of water level that occurs during the 30-minute period is used to calculate the percolation rate.

9.5.2.1.6. In soils in which the first 6 inches of water seeps away in less than 30 minutes after the 24-hours or greater saturation period, the time interval between measurements shall be taken at 10 minutes and the test run for one hour. The drop that occurs during the final 10 minutes is used to calculate the percolation rate.

9.5.2.2. The size of the absorption area may be determined from the results of the percolation test and the data in Appendix A. As noted in Appendix A, soil in which the percolation rate is greater than 75 minutes per inch (mpi) is unsuitable for a standard soil absorption system.

9.5.2.3. The size of the absorption area for a system sized using percolation rate data shall not be smaller than that required by seasonal water table data for the same site.

9.6. Serial Distribution

9.6.1. Serial distribution allows for unequal length lines. Serial distribution may only be used when maximum storage can be achieved for all lines. The overflow point of the tee must be at the ground level of the line served.

9.6.2. Serial distribution systems designed under percolation test shall not be smaller than required by seasonal water table data.

9.7. Capping Fill Systems

9.7.1. Soil absorption systems shall not be installed in fill material. However, fill material may be used as a cap over the natural soil surface to increase the volume available for the storage of effluent.

9.7.2. Where capping fill is incorporated in the design of an onsite wastewater system, the distribution system shall be capable of storing effluent to the top of the settled cap.

9.7.3. The absorption trenches on capping fill systems must be designed and installed in the natural soil. However, a variance as provided in 3.1 and 3.2 can be requested to install the absorption trenches partially in the fill, no less than 4 inches into the natural soil, to overcome bedrock separation requirements. Systems utilizing capping fill shall have a minimum 6 inches of settled cover above the gravel bed or gravel substitute.

9.7.4. The slope of the absorption area cannot exceed 12%. Submitted plans must indicate both the original and the finished elevations referenced to a benchmark.

9.7.5. For absorption areas exhibiting slopes of 6% or less, the full depth of fill must extend a minimum of 10 feet beyond the edge of the absorption trench then graded at a three to one or less slope. The fill area must be seeded and watered regularly to prevent erosion.

9.7.6. For absorption areas exhibiting slopes greater than 6% the full depth of fill must extend 1 foot beyond the absorption area on the up hill side, 10 feet on the sides of the absorption area, and 20 feet on the down hill side of the absorption area and then all sides graded to a three to one slope or less thereafter. The fill area must be seeded and watered regularly to prevent erosion.

9.7.7. For absorption areas exhibiting slopes greater than 6%, a berm and/or drainage ditch to divert surface water is required. The berm and/or drainage ditch shall be constructed no more than 10 feet up slope from the absorption area and extending a minimum 10 feet beyond the applied capping fill.

9.7.8. On slopes of greater than 12%, a variance for capping fill systems may be granted in accordance to sections 3.1 and 3.2.

9.7.9. The fill material used must be a uniform loamy soil with maximum clay content of 27%. The depth of fill above the original ground surface is measured after settling. Loamy soils can be expected to settle 25%.

9.7.10. The absorption area and borrow site must be scarified to destroy and remove the vegetative material. The absorption area must be tilled to a minimum depth of 4 inches. Stumps should be left in place at the absorption area to prevent extensive disruption of the soil.

9.7.11. Where capping fill is incorporated into the design of a system, only track equipment may be utilized when applying the cap.

9.7.12. The soil cap is a part of the soil absorption system and shall meet all the setbacks outlined in Section 6.2 of this regulation.

9.8. Dosing Standard Systems

9.8.1. All components and specifications of dosed systems shall be submitted for approval to the Department or its authorized agent in accordance with the Department's Guidelines for Submittal of Onsite Wastewater System Applications.

9.8.2. Serial distribution systems shall not be approved for dosing situations.

9.8.3. Where a pump or dosing siphon is used to dose an onsite wastewater system, it shall have a capacity sufficient to deliver the required dose volume. Pump controls shall operate automatically and be sufficiently adjustable to deliver the required dose volume.

9.8.4. Only effluent quality pumps shall be utilized in dosing applications. Dewatering and grinder pumps are not approved for septic applications.

9.8.5. Effluent shall be dosed to the absorption area at a rate not greater than twenty-five (25) percent of the estimated daily usage outlined in Appendix B of this regulation.

9.8.6. A visible and audible high water alarm shall be required for all electrical dosing situations.

9.8.7. Stand-alone dosing tanks shall have a capacity sufficient to contain the required dose, storage for ballast not less than one quarter of the dose tank capacity, and emergency storage above the high water alarm not less than one third of the estimated daily usage.

9.8.8. The compartment of combination tanks used for dosing shall have a capacity sufficient to contain the required volume and must be hydraulically isolated from the primary compartment.

9.8.9. Pre-cast dosing tanks shall meet the same construction requirements for pre-cast septic tanks outlined in Section 11.6 of this regulation.

9.8.10. The approval of any distribution device utilized in dosing situations shall be at the sole discretion of the Department or its authorized agent.

9.8.11. Dosing from a Septic Tank

9.8.11.1. When dosing from the septic tank, the tank capacity shall be increased by not less than two hundred fifty (250 gallons) above that specified in Appendix C of this regulation.

9.8.11.2. A filtered pump vault approved by the Department for use in septic tanks shall be incorporated into all systems designed to be dosed from a septic tank.

9.8.11.3. The filtered pump vault shall be securely mounted to the tank in a manner that prevents movement of the vault during operation.

9.8.11.4. The minimum horizontal separation between the inlet baffle of the septic tank and the filtered pump vault shall be 3 feet.

9.8.11.5. When a system is dosed from a septic tank, the drawdown per dose cycle shall not be greater than 3 inches.

9.8.12. Electrical Connections

9.8.12.1. All electrical connections shall be complete at the time of final system inspection unless otherwise specified by the Department's authorized agent.

9.8.12.2. All system wiring shall be encased in electrical conduit.

9.8.12.3. All splices within system wiring shall be made with heat shrink connectors or waterproof wire nuts.

9.8.12.4. All electrical connections shall be made inside watertight splice boxes.

9.8.12.5. All conduit and connection boxes shall be sealed with electrical grease or other waterproof electrical sealant in order to minimize corrosion due to moisture and/or gasses escaping the system.

9.8.12.6. All system wiring shall comply with the Arkansas State Electrical Code.

9.8.12.7. Pumps and pump alarms shall not be on the same circuit.

9.9.Low Pressure Distribution (LPD)

Low pressure distribution allows an absorption area or secondary treatment filter to be dosed evenly across the entire area. The discharge assembly of LPD systems consists of small diameter piping with orifices drilled at predetermined intervals through which effluent is dosed to the absorption area or secondary treatment filter. All LPD systems shall meet the following requirements.

9.9.1. All piping in LPD systems shall be constructed of schedule 40 PVC pipe. All joints or connections shall be primed and welded with the appropriate chemical agents.

9.9.2. Orifices may range in size from 0.125 (1/8) inch to 0.1875 (3/16) inch. All orifices shall be centered in the pipe, pointed up, and shielded. In situations where the discharge assembly is located at a lower elevation than the pump, 25% of the orifice should be turned down to allow the system to drain between doses. For soils with high hydraulic conductivity, the orifice spacing shall not exceed 24 inches. For soils with moderate hydraulic conductivity, the orifice spacing shall not exceed 48 inches. Orifices shall not be installed within twelve inches of the manifold pipe.

9.9.3. In situations where the discharge assembly is located at a lower elevation than the pump, a 0.25 (1/4) inch siphon-breaker hole shall be drilled in the pump effluent line above the high water level to prevent siphoning. An extra 2 gallons per minute shall be added to the system flow rate to accommodate the siphon-breaker hole.

9.9.4. The orifice head (height of squirt) shall not be less than 5 feet.

9.9.5. The dose volume shall not exceed 0.5 gallons per orifice.

9.9.6. Plastic or brass valves, either globe or gate, shall be installed between the manifold and distribution laterals in order to facilitate orifice head adjustment. Valves may not be required on secondary treatment filters. All valves shall be encased in readily accessible valve boxes or similar encasement.

9.9.7. A 90-degree electrical sweep with threaded cleanout or valve shall be installed at each end of the laterals for maintenance. All cleanouts shall be encased in readily accessible valve boxes or similar encasement.

9.9.8. LPD absorption trenches shall contain a minimum of 8 inches of gravel and 4 inches of cover above the gravel bed. Approved gravel substitutes may be used in LPD design.

9.10. Construction Considerations

9.10.1. Careful construction is important in constructing a satisfactory absorption area. Attention should be given to the protection of the natural absorption properties of the soil. Care must be taken to prevent sealing of the surface on the bottom and sides of the trench. Trenches should not be excavated when the soil is wet enough to smear or compact easily. When significant smearing of the sidewalls or bottom of the absorption trench occur during installation, construction shall be halted and the local Authorized Agent shall be contacted for guidance. During the wet season of the year or after any significant rainfall event, failure to obtain authorization from the local Authorized Agent for beginning construction of an onsite wastewater system may void the Onsite Wastewater System Permit. Open trenches should be protected from surface run-off to prevent the entrance of any silt and debris. If it is necessary to walk in the trench, a temporary board laid on the bottom will reduce damage by compaction. Some smearing and damage is bound to occur. All smeared or compacted surfaces should be raked to a depth of one inch, and loose material removed, before the gravel is placed in the trench. All non-perforated pipes and the distribution box must be bedded on undisturbed earth to prevent settling, lateral lines shall be surrounded by clean, graded gravel, washed rock, or other approved aggregate. The aggregate material may range in size from 1/4 inch to 1-1/2 inches.

9.10.2. Cinders, broken shell and similar material are not approved. They are usually too fine and may lead to clogging of the absorption system. The top of the gravel should be covered with untreated building paper or other approved materials before placing the earth backfill. This will help prevent the gravel from becoming clogged with the earth. An impervious covering shall not be used, as this interferes with evaporation. The top of a new absorption trench must be adequately overfilled to allow for settling.

9.10.3. Heavy machinery, exclusive of the equipment needed to install the system, shall be excluded from the absorption area unless special provision is made to support the weight. All machine grading, unless specified in the permit, is prohibited.

9.10.4. Where capping fill is incorporated into the design of a system, only track equipment may be utilized when applying the cap.

9.10.5. Distribution boxes/devices. A distribution box/device is required for every standard absorption system. The purpose of the box/device is to ensure equal distribution of septic tank effluent to the lateral lines. It is important that the entrance to each lateral line from the distribution box be set at the same elevation to attempt to ensure equal flow into all lines. The design of the distribution box and absorption system can be varied to meet most topographical conditions encountered, while giving proper grade and alignment for all laterals. Distribution boxes shall be sealed, bedded in concrete or gravel on undisturbed ground, and water leveled with leveling devices. All distribution boxes must have an easily removable cover to facilitate leveling, inspection, and repairs. Inlet and outlet lines at the distribution box shall be installed in such a manner as to be firmly supported and adequately sealed as approved by the authorized agent. Where the elevation across the absorption area is greater than six inches, the outlet invert (flowline) of the distribution box must be installed at an elevation equal to or greater than the finished ground elevation of the highest line of the absorption area.

9.10.6. Septic tanks. On sites that do not have sufficient slope to allow the distribution box to be installed as in 9.10.5, the flow line of the septic tank outlet shall be at an elevation equal to or greater than the finished ground elevation of the highest line of the absorption area.

9.10.7. Absorption trenches shall not start closer than 5 feet from the distribution box. A horizontal separation of 5 feet shall be required between the absorption area and tightline trench. In systems utilizing a distribution box, all lateral lines must be of the same length. All distribution devices used in conjunction with soil absorption systems must be approved by the Department prior to their use or installation.

9.10.8. Materials used in the construction of the onsite wastewater system shall meet the following requirements (New products may be approved by the Department as technology allows):

SOLID PIPE:

Pipe installed from the outlet tee of the septic tank to the distribution box or diversion device shall be Schedule 40 pipe for whatever distance is required to reach undisturbed soil, but in no case shall be less than ten feet. Once a solid trench bottom is achieved the Schedule 40 pipe may be adapted to SDR 35 PVC pipe or ASTM 3034 PE (polyethylene) pipe for the remaining distance to the distribution box or diversion device. SDR 35 PVC, ASTM 3034 PE or Schedule 40 PVC shall be used from the distribution box or diversion device to the perforated field line pipe.

PERFORATED DRAIN PIPES:

Perforated pipe in absorption lines shall be ASTM 2729 PVC or ASTM F-810 PE.

9.10.9. Any pipe under driveways, roadways, parking areas, or any area where traffic will pass over shall be constructed of Schedule 40 PVC, cast iron, or use a steel sleeve. A cleanout shall be located between the stubout and the septic tank.

9.10.10. House sewer lines shall be installed and maintained in accordance with the Arkansas State Plumbing Code.

Section 10. Alternate Systems

10.1. Alternate systems outlined in this section shall not be approved as a uniform plan of development in any municipality, community, subdivision, or other developed area.

10.2. All alternate systems outlined in this section shall be installed by a licensed septic system installer. Installers may be required to attend special training sessions before being allowed to install certain types of alternate systems.

10.3. In addition to the permitting requirements outlined in Section 5 of this regulation, a Memorandum of Agreement signed by the property owner shall be submitted as part of the Onsite Wastewater System Application for all alternate systems.

10.4. The Department or its authorized agent may require the designated representative to oversee the construction of projects with unusual or rarely used designs.

10.5. Surface Discharging Systems

10.5.1. Surface discharging systems shall not be approved for sites with soil conditions, which meet the standards referenced in Sections 8.5, and 8.6 for the installation of subsurface absorption systems.

10.5.2. Prior to approval, for all sites proposed for surface discharging systems, concurrence shall be obtained from one of the following individuals in addition to the Local Authorized agent.

10.5.2.1. A Professional Soil Classifier of the Department or a designated Authorized Agent trained and proficient in soil analysis.

10.5.2.2. A private Professional Soil Classifier holding a current Designated Representative License retained at the discretion of the Permit Applicant.

10.5.3. Surface discharging systems shall not be approved in subdivisions or other high-use areas, regardless of lot size.

10.5.4. All surface discharging systems are subject to National Pollutant Discharge Elimination System (NPDES) Permit requirements.

10.5.5. Disinfection

10.5.5.1. All surface discharging systems must be adequately disinfected prior to discharge.

10.5.5.2. Chlorination, ozone induction, and ultraviolet exposure are all acceptable means of disinfection for surface discharges. Installation, operation and performance data supplied by the manufacturer shall be submitted with all designs incorporating ozone or ultraviolet light devices.

10.5.5.3. Chlorinators used in surface discharging systems shall produce a minimum 10 parts per million chlorine solution during peak flow.

10.5.5.4. A baffled contact chamber sufficient in size to provide a 30 minute retention time with a minimum flow of 1 gallon per minute shall be required after the chlorinator for all surface-discharging systems utilizing chlorine disinfection. The minimum size of a chlorine contact chamber shall be 30 gallons. A sample port must be installed at outlet end of contact chamber.

10.5.5.5. The point of discharge from the chamber shall be above the high water level of a receiving stream or ditch. The chamber discharge elevation shall also be below its influent elevation to prevent flooding of the treatment unit.

10.5.6. When a surface discharging system fails to function properly or does not consistently meet the discharge requirements, the discharge of wastewater shall stop immediately. The owner shall be allowed to use the septic tank or mechanical treatment unit as a holding facility until adequate repairs are made.

10.5.7. Onsite Discharging Systems

10.5.7.1. Some sites may be adequate in size to retain all effluent discharged to the surface onsite. Sites considered for onsite discharge shall meet the following minimum requirements in addition to setback requirements outlined in Section 6.2 of this regulation.

10.5.7.2. The lot size for all sites proposed for onsite discharge shall be 3 acres or greater.

10.5.7.3. The point of discharge shall be 300 feet or greater from any adjacent dwelling.

10.5.7.4. The point of discharge shall be 150 feet or greater from any adjacent property line.

10.5.7.5. The point of discharge shall be 200 feet or greater from any property line in the direction of flow on sites exhibiting slopes of 12% or less.

10.5.7.6. The point of discharge shall be 100 feet or greater from the dwelling served by the surface discharging system.

10.5.7.7. The slope of the discharge area shall not be greater than 12%. However, variences for sites proposed for surface discharges that exhibit a slope greater than 12% may be requested of the Department in writing. Approval of such variences shall be at the sole discretion of the Department.

10.5.8. Offsite Discharging Systems

10.5.8.1. Offsite discharging systems shall not be approved for new construction.

10.5.8.2. A N.P.D.E.S. Permit is required from the Arkansas Department of Environmental Quality for all offsite discharging systems.

10.6. Holding Tanks

10.6.1. Holding tanks shall not be approved on sites acceptable for the installation of subsurface onsite wastewater systems as outlined in Sections 8.5, and 8.7 of this regulation.

10.6.2. Holding tanks shall be approved only for domestic waste from commercial establishments, excluding grocery stores and/or food service establishments.

10.6.3. Holding tanks shall not be approved for residences, full or part time.

10.6.4. The minimum capacity of any holding tank shall be ten times the estimated daily usage as outlined in Appendix C of this regulation or 1000 gallons, whichever is greater.

10.6.5. A service riser with a minimum diameter of 12 inches and installed above ground surface shall be required on all holding tanks. All service risers installed on holding tanks shall be adequately secured to prevent unauthorized access.

10.6.6. Facilities shall be maintained to allow a pumper vehicle to drive within 10 feet of the service riser in all weather conditions.

10.6.7. Proof of a notarized contract with a licensed septic tank cleaner shall be required before a permit to operate is issued. The contract shall provide for cleaning within 24 hours of notification, and shall state where the wastewater will be deposited.

10.6.8. Holding tank contents shall not be land applied. The contents of a holding tank shall only be disposed of by means of deposition into a municipal wastewater treatment plant with which the septic tank cleaner has permission to dump.

10.6.9. All holding tanks shall comply the specifications for septic tanks outlined in Section 11 of this regulation.

10.6.10. A visible and/or audible high water alarm indicating when the tanks has reached 75% capacity shall be installed inside the structure served by the holding tank. Information on the alarm system's brand name, manufacturer, use, and installation must be provided with the submittal of plans. The name of the licensed cleaner and his telephone number must be displayed on the alarm.

10.7. Composting/Incinerating Toilets

A composting toilet is a device specifically designed to retain and process body wastes and, in some cases, household garbage by biological degradation. The process may be either thermophilic or mesophilic, depending on the design of the toilet. Thermophilic devices are normally smaller and require some type of energy input to maintain the desired temperature. Mesophilic devices rely on the heat produced by the biological process to maintain the required temperature. Whether or not a device can accept household garbage is dependent on product design and intended use. An incinerating toilet is a device designed to reduce body wastes, both urine and feces, to an ash residue. The type of energy used to incinerate wastes is dependent upon the design of the device used.

10.7.1. Only pre-manufactured composting or incinerating toilets approved by the Department shall be utilized in the onsite wastewater system. Under NSF standard 41, all composting and incinerating devices shall be evaluated by an ANSI approved laboratory.

10.7.2. Grey water, exclusive of urine and feces, produced by the structure served by a composting/incinerating toilet shall be renovated or disposed of in accordance with Sections 9 or 10.5 of this regulation.

10.7.3. The stabilized compost from a composting toilet must be buried onsite or deposited in an approved sanitary landfill.

10.7.4. The ash from an incinerating toilet requires no special handling since any pathogen would be destroyed in the incineration process.

Section 11.Septic Tanks

11.1. The minimum liquid capacities required in Appendix C, allow for the use of standard household appliances. Garbage grinders are not recommended for subsurface absorption systems.

11.2. Location. Consideration should also be given to the location from the standpoint of cleaning and maintenance. Septic tanks shall be so located that septic tank cleaning equipment trucks can be driven within reasonable vertical and horizontal distance of the tank for the purpose of tank cleaning. Where public sewers may be installed at a future date, provision should be made in the household plumbing system for connection to such sewer.

11.3. All septic tanks and dosing tanks used in Arkansas must be manufactured by an individual holding a current septic tank manufacturer license issued by the Department. The manufacturer is responsible for producing septic tanks, pump basins, and dosing tanks that meet all current requirements as outlined in these regulations.

11.4. The septic tank installer is responsible for inspecting the tank(s) delivered to the jobsite to ensure a licensed manufacturer produced it and that it remains in a sound, watertight condition throughout the installation. All septic tanks shall be installed and bedded on a firm, level, gravel surface. All influent and effluent lines connected to the tank must be sealed in a manner that prevents groundwater infiltration and pipe movement. Rubber or plastic pipe penetration seals shall be either cast into the tank or installed after manufacture.

11.5. Septic Tanks no longer in use must be pumped out by a licensed septic tank cleaner, collapsed, and filled with clean material at the time of abandonment.

11.6. Specifications for septic tanks and dosing tanks.

11.6.1. General. All portions of septic tanks shall be watertight. Septic tanks shall be constructed of materials not subject to excessive corrosion decay, or leakage. Approved materials include concrete, fiberglass, and polyethylene. Approval of other materials will be considered on a case-by-case basis. All septic tanks sold in the State of Arkansas shall meet the specifications in these regulations and be approved by the Department. With exception of the wall and bottom thickness, precast tanks and cast-in-place tanks shall meet the same design requirements

11.6.2. Cast-in-place concrete tanks. Cast-in-place concrete tanks shall be watertight, adequately reinforced and constructed of high strength concrete, and shall be constructed in accordance with good concrete construction practices. The minimum wall and bottom thickness for cast in place septic tanks is 5 inches and the minimum top thickness is 4 inches. Cast in place tanks must be reinforced with #10 welded wire mesh throughout. The bottom and sides must be manufactured in a single, continuous pour. The lids of cast in place tanks must be reinforced with 0.5-inch (#4 rebar) reinforcement rods on 18-inch centers in addition to the welded wire mesh.

11.6.3. Pre-cast septic tanks. All pre-cast septic tanks sold and used in Arkansas shall be manufactured in accordance with the AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARD SPECIFICATION FOR PRE-CAST CONCRETE SEPTIC TANKS C 1227-03. Pre-cast septic tanks shall be constructed with high strength concrete made with Portland cement and have a compressive strength of 4000 pounds / square inch at 28 days of age. No aggregate used in the concrete mix is to exceed a diameter or length of 0.5 inch. Lightweight aggregates must meet ASTM SPECIFICATION C 330 SPECIFICATION FOR LIGHTWEIGHT AGGREGATES FOR STRUCTURAL CONCRETE. Water used in mixing concrete must be clean and free of injurious amounts of oil, alkalines, acids, salts, or other substances that may be incompatible with concrete. Tanks shall be designed so they will not collapse or rupture when subjected to anticipated earth and hydrostatic pressures when the tanks are either full or empty.

11.6.3.1. Pre-cast concrete tanks shall be adequately reinforced with #10 welded concrete reinforcement wire tied at the edges and corners. Reinforcement rods are required to be added at lift points. Chairs, bolsters, braces, and spacers in contact with the forms must have a corrosion resistant surface. Reinforcement must be placed as near the center of the walls as possible and shall have a minimum of one-inch concrete cover.

11.6.3.2. The forms used in septic tank manufacture shall be sufficiently rigid and accurate to maintain the dimensions of the tank. All casting surfaces shall be of a smooth, non-porous material. Form releasing agents used shall not be injurious to the concrete.

11.6.3.3. Concrete for the tank walls and bottom shall be placed in the forms in a single, continuous pour. The concrete shall be placed in the forms at a rate that allows the concrete to consolidate in all parts of the form and around all reinforcement steel and imbedded fixtures without segregation of materials. The finished tank shall be smooth and have a uniform thickness not less than 2.5 inches. The top of the tank shall be no less than 3.5 inches thick and adequately reinforced to support the load to which it may be subjected. At a minimum, the lid shall be reinforced with #10 welded wire mesh and 0.5 inch reinforcement rods (#4 rebar) on 18-inch centers. Pre-cast concrete tanks shall be cured for 28 days before delivery to assure proper curing. During delivery, the tanks are to be properly handled to assure the installation of a tank that is watertight and otherwise in good condition.

11.6.3.4. All joints between the tank and lid and between the two sections of two-piece tanks shall be sealed to prevent leakage during settling or shifting. The sealant shall be resistant to corrosion and anaerobic activity. The inside joint seam gap, between the 2 sections placed together before sealing, is not to exceed 1/4 (0.25) inch.

11.6.3.5. The upper and lower sections of septic tanks shall be permanently connected with non-corrosive mechanical devices by the manufacturer to insure no separation occurs. All manufacturers shall comply with this requirement by July 1, 2009.

11.6.3.6. Septic tank manufacturers are required to demonstrate the water tightness on their products when requested by the system designer, installer or the authorized agent. Testing for leakage may be done using either vacuum testing or water pressure testing. Small leaks found during testing may be sealed with an appropriate sealer. In no case will a tank be considered acceptable which has evidence of large cracks or repairs that compromise the structural integrity and water tightness of the tank.

11.6.3.6.1. Vacuum testing. Seal the empty tank and apply a vacuum to 2 inches (50mm) of mercury. The tank is approved if 90% of the vacuum is held for 2 minutes.

11.6.3.6.2. Water-pressure testing. Seal the tank, fill with water to the level of the top of the access port, let stand for 24 hours. Refill tank. The tank shall be considered water tight if the water level is held for 60 minutes.

11.6.3.7. All precast concrete septic tanks manufactured and used in Arkansas must be clearly, permanently, and legibly labeled with the following:

11.6.3.7.1. The name of the individual or company that manufactured the tank.

11.6.3.7.2. The liquid capacity of the tank in gallons.

11.6.3.7.3. The inlet and outlet(s) must be indicated.

11.6.3.7.4. The date of manufactures of the tank and lid.

11.6.4. Tank proportions. The liquid depth of any tank compartment shall not be less than 36 inches and shall not exceed 72 inches. The minimum horizontal distance from the inlet to the outlet of any tank may not be less than 72 inches. Storage capacity is required above the liquid line to provide for that portion of scum that floats above the liquid in all septic tanks. On the average, 30% of the total scum will accumulate above the liquid line. In addition to the provision for scum storage, one inch shall be provided at the top of the tank to permit the free passage of gas back to the inlet and house vent pipe. For tanks having vertical sides, the distance between the inside top of the tank and the liquid level shall be 12.5% of the liquid capacity or 9 inches, which ever is greater. In horizontal, cylindrical tanks, this distance should be equal to 20% of the tank diameter.

11.6.5. Inlet and outlet. Four-inch or larger sanitary tees shall be used as inlet and outlet devices in all septic tanks. The septic tank manufacturer shall provide properly constructed inlet and outlet devices with each tank. The effluent line leaving the tank shall be Schedule 40 PVC. The inlet invert shall enter the tank at least 3 inches above the liquid level in the tank to allow for a momentary rise in liquid level during discharges to the tank. This free drop prevents blackwater and standing of solid material in the house sewer leading to the tank. The inlet tee shall extend 6 inches below the liquid level in the tank and extend above the liquid level to a minimum of one inch from the top of the tank.

11.6.5.1. Outlet tees shall extend to a distance below the surface 35 to 45%of the liquid depth.

11.6.6. Approved outlet filters are recommended on all septic tanks. Outlet filters have been shown to reduce total suspended solids (TSS) and biochemical oxygen demand (BOD) and should be utilized to protect and lengthen the life of the absorption area. Proprietary gas deflectors designed to deflect or otherwise prevent solids from entering the outlet tee are not required but are recommended to increase the efficiency of the septic tank. Where gas deflectors, outlet filters, or other devices requiring routine maintenance are installed in the tank, a service riser extending to grade shall be installed over the outlet inspection port. All inlet and outlet baffles and devices must be evaluated and approved by the Department prior to use. Manufacturers may submit product samples and ancillary documentation to the Department for evaluation. After evaluation, the Department will either approve or not approve the product submitted. Lists of approved products will be routinely updated and distributed.

11.6.7. Fiberglass septic tanks. Fiberglass septic tanks shall comply with International Association of Plumbing and Mechanical Officials. The manufacturer shall supply without charge satisfactory evidence of approval and compliance with IAPMO PS 1-2004e1 construction and manufacturing requirements.

11.6.8. Service Risers. Access shall be provided over both the inlet and outlet tees or devices and to each tank compartment by means of a service risers. All maintenance ports must be sealed and watertight. Where the top of the tank is located below the finished grade, service risers shall extend to or above the finished grade. The extension can be made using risers of approved material and fitted with tight covers of heavy metal or concrete and secured to prevent unauthorized access. Proper attention must be given to the accident hazard involved when maintenance ports are extended close to the ground surface. Service risers shall be a minimum of 12 inches in diameter. Service risers providing access to a pump compartment or dosing tank shall be a minimum of 18 inches in diameter.

11.6.8.1. Service risers should be available through the septic tank manufacturer. Risers may be installed on the tank by the manufacturer or set in place and sealed in a sanitary manner by the installer.

11.7. Grease interceptors shall be installed and maintained in accordance with the ARKANSAS STATE PLUMBING CODE. The minimum volume in gallons for a grease interceptor utilized with an onsite wastewater system, shall either be 500 or the number of fixture units multiplied times a flow rate of 7.5 gallons per minute multiplied times a 12 minute retention time (#Fx7.5x12), whichever is greater. Fixture units will be calculated using Arkansas State Plumbing Code. Grease interceptors installed below finished grade will be installed with service risers to the finished grade. The size of the service riser will be adequate in size to accommodate proper inspection and maintenance.

SECTION VI. THE HOUSE SEWER:

6.1. House sewer. The house sewer is an important part of the private sewage disposal system. It should convey the sewage from the building to the septic tank inlet, but not at a high velocity that would cause disturbance in the septic tank. The house sewer shall not be reduced in size from the house drain to the septic tank. Care shall be taken to obtain a tight seal at the entrance of the house sewer into the septic tank.

6.3. House sewer grade. The grade or slope of the house sewer, which conveys the sewage to the septic tank, should be sufficient to move the sewage slowly but efficiently to the septic tank. Excessive grades will cause increased velocity into the tank and have a tendency to disrupt the settling action of the tank. Too little grade will result in sewer stoppage and a nuisance. The house sewer should be installed with a uniform slope, with not less than 1/8-inch fall per foot, and preferably not more than 1/4 inch per foot.

6.6. Cleanouts. The house sewer line shall contain a 4-inch cleanout before entering the septic tank or treatment plant.

Section 12. Secondary Treatment

Secondary treatment systems utilize an additional means of septic effluent treatment subsequent to the primary treatment performed by a septic tank. Some aerobic treatment units (ATU's) do not require that effluent be treated by a septic tank prior to treatment by the ATU. All secondary treatment units incorporated into the design of an onsite wastewater system shall comply with the following specifications.

12.1. Effluent treated by a secondary treatment unit shall be further renovated or discharged in accordance with either Section 9 or Section 10.5 of this regulation.

12.2. The discharge from all secondary treatment units shall meet current N.P.D.E.S. discharge requirements.

12.3. All onsite wastewater systems incorporating secondary treatment units shall comply with the Onsite Maintenance Program outlined in Section 14 of this regulation.

12.4. Aerobic Treatment Units (ATUs)

12.4.1. Only ATUs approved by the Department shall be utilized in onsite wastewater systems. All ATUs must meet current American National Standards Institute/National Sanitation Foundation (ANSI/NSF) Standard 40 requirements.

12.4.2. ATUs shall be installed according the manufacturer's specifications as approved by the Department. Some ATUs require installer certification provided by the manufacturer in order to install and/or maintain the unit.

12.5. Single Pass Filters

12.5.1. Intermittent Sand Filters (ISFs)

12.5.1.1. Intermittent Sand Filters pass effluent treated by a septic tank or ATU through a sand and gravel bed, built on site, prior to subsurface absorption or surface discharge. Intermittent sand filters shall meet the following criteria.

12.5.1.2. A septic tank or ATU shall be required as the primary treatment of effluent prior to treatment by an ISF.

12.5.1.3. Effluent shall be dosed to the ISF by a pump housed in a filtered pump vault approved by the Department.

12.5.1.4. Effluent shall be distributed to the ISF by means of low pressure distribution grid constructed as outlined in Section 9.9 of this regulation.

12.5.1.5. The collection line in the bottom of an ISF shall not be less than 4 inch perforated or slotted schedule 40 PVC pipe.

12.5.1.6. The dosing rate for ISFs shall not be greater than 0.25 gallons per orifice per dose (gal/orifice/dose).

12.5.1.7. The loading rate for ISFs shall not be greater than 1.25 gallons per square foot per day (gal/ft²/day).

12.5.1.8. ISFs may be installed either in or above ground. However, the top of the ISF bed shall not be installed below the finished grade of the ground surface.

12.5.1.9. A PVC liner not less than 30 millimeters in thickness, with inlet and outlet boots shall be required in all ISFs in order to minimize groundwater infiltration into the system.

12.5.1.10. Not less than 2 inches of gravel cover shall be applied atop the collection pipe in the bottom of an ISF. The gravel used shall be crushed rock or rounded rock, 1.0 inch to 2.5 inches in diameter.

12.5.1.11. Not less than 4 inches of 3/8-inch pea gravel shall be applied atop the crushed or rounded rock in the bottom of an ISF in order to prevent migration of filter sand into the collection piping and out of the filter.

12.5.1.12. Not less than 24 inches of filter sand shall be applied atop the pea gravel in the bottom of the ISF. Filter media used shall be 0.28 millimeters to 1.0 millimeter in diameter, with a uniformity coefficient of 4.0.

12.5.1.13. Not less than 3 inches of 3/8-inch pea gravel shall be applied atop the filter sand in an ISF. The low pressure distribution system servicing an ISF shall be installed atop this layer of pea gravel.

12.5.1.14. Not less than 3 inches of 3/8-inch pea gravel shall be installed as cover over the low pressure distribution system servicing an ISF.

12.5.1.15. No greater than 6 inches of soil cover shall be applied to the surface of the gravel and sand bed in order to minimize odor produced by an ISF. Polyester spun fabric shall be installed atop the filter bed prior to the application of the soil cover in order to prevent the migration of the soil cover into the filter bed.

12.6. Multiple Pass Filters

12.6.1. Recirculating Sand Filters (RSFs)

12.6.1.1. Recirculating Sand Filters pass effluent treated by a septic tank or ATU through a sand and gravel bed, built on site, prior to subsurface absorption or surface discharge. Recirculating sand filters shall meet the following criteria:

12.6.1.2. A septic tank or ATU shall be required as the primary treatment of effluent prior to treatment by an RSF.

12.6.1.3. Effluent shall be dosed to an RSF by a pump housed in a filtered pump vault approved by the Department.

12.6.1.4. Effluent shall be distributed to an RSF by means of low pressure distribution as outlined in Section 9.9 of this regulation.

12.6.1.5. The collection line in the bottom of an RSF shall not be less than 4 inch perforated or slotted schedule 40 PVC pipe.

12.6.1.6. The dosing rate for RSFs shall not be greater than 0.25 gallons per orifice per dose (gal/orifice/dose).

12.6.1.7. The initial recirculation rate for RSFs shall be 4:1. Depending upon water usage, the recirculation rate may be adjusted after system evaluation.

12.6.1.8. The loading rate for RSFs shall not be greater than 5 gallons per square foot per day (gal/ft²/day).

12.6.1.9. RSFs may be installed either in or above ground. However, the top of the RSF bed shall not be installed below the finished grade of the ground surface.

12.6.1.10. A PVC liner not less than 30 mils in thickness, with inlet and outlet boots shall be required in all RSFs in order to minimize groundwater infiltration into the system.

12.6.1.11. Not less than 2 inches of gravel cover shall be applied atop the collection pipe in the bottom of an RSF. The gravel used shall be crushed rock or rounded rock, 0.5 inch to 1.5 inches in diameter.

12.6.1.12. Not less than 4 inches of 3/8-inch pea gravel shall be applied atop the crushed or rounded rock in the bottom of an RSF in order to prevent migration of filter sand into the collection piping and out of the filter.

12.6.1.13. Not less than 24 inches of filter sand shall be applied atop the pea gravel in the bottom of an RSF. Filter media used shall be 1.5 millimeters to 2.5 millimeters in diameter, with a uniformity coefficient of 2.0 or less.

12.6.1.14. Not less than 3 inches of 3/8-inch pea gravel shall be applied atop the filter sand in a RSF. The low pressure distribution system servicing an RSF shall be installed atop this layer of pea gravel.

12.6.1.15. Not less than 3 inches of gravel shall be installed as cover over the low pressure distribution system servicing an RSF.

12.6.1.16. The top of the RSF filter bed shall be left uncovered.

12.7. Other Filters

Proprietary media filters such as peat filters, gravel filters, and geo-textile filters shall be designed and installed in accordance with the manufacturer's specifications as approved by the Department.

Section 13. Onsite Maintenance and Monitoring Program

Owners of Onsite and Offsite Surface Discharging Systems, which include alternate systems discharging into reduced absorption areas or Holding Tanks, are required to maintain a Maintenance and Monitoring Contract with Maintenance Personnel certified by the Department for the life of the system.

13.1. The Maintenance and Monitoring Contract and the Memorandum of Agreement shall be submitted with the Application for an Onsite Wastewater System Permit (EHP-19).

13.2. All Maintenance and Monitoring Contracts shall include the following minimum terms or services:

Frequency of system assessments

Assessment of system components

Assessment of discharge route for surface discharge systems

Measurement of free chlorine residual, if applicable

Assessment of proper servicing of grease interceptor, if applicable

Reporting to the Arkansas Department of Health and Human Services

13.3. Assessments shall be conducted for all systems maintained and monitored under the program a minimum of once every 6 months.

13.4. Free chlorine residual will be measured and recorded from the outlet end of the contact chamber. If the free chlorine residual is less than 0.1 parts per million, collection of a fecal coliform sample is required within acceptable limits, as specified the National Pollutant Discharge Elimination System (NPDES) discharge parameters, before returning to a routine schedule.

13.5. Where ozone, ultraviolet, or other disinfection methods that do not produce a chlorine residual are incorporated in the system, annual fecal analysis of the discharged effluent shall be required.

13.6. Maintenance and Monitoring Contracts with Maintenance Personnel with additional monitoring terms and services may be required by the department for approval of systems permitted under the variance and experimental sections 3.1 and 3.2

13.7. Onsite Maintenance and Monitoring reports shall be submitted to the homeowner, local health unit, and the Department's database. Certified Maintenance Personnel shall maintain a copy for their records.

13.8. Maintenance personnel shall be certified by the Department. To maintain certification, Onsite Maintenance Personnel shall attend an annual training session.

Section 14. Designated Representatives

14.1. A fee of fifty dollars ($50.00) shall be levied annually for the registration of each Designated Representative. Each Designated Representative who operates within the State of Arkansas, regardless where their home office may be, must be registered by the Department. The registration will be issued by the Department upon successful completion of an examination and compliance with the provisions of the Rules and Regulations. I n order to maintain registration, a Designative Representative must attend at least one (1) annual training course approved by the Department prior to March 1 and continue to demonstrate competency in practice to ensure the purpose of this regulation. Registration renewal fees shall be renewable on January 1 of each year. Failure to pay the registration renewal fee by March 1 shall result in a late fee equal to one half of the renewal fee. Failure to pay the registration renewal fee within a calendar year or failure to attend an approved training course by March 1 shall require re-examination in order to become registered.

14.2. The Designated Representative's license may be revoked or suspended whenever any provision of these Rules and Regulations is violated pursuant unto the Arkansas Administrative Procedures Act. Each Designated Representative must furnish proof of current registration upon request by an authorized agent of the Department.

Section 15.I nstallers

15.1. Each installer who operates within the State of Arkansas, regardless of wherever the home office may be, must be registered by the Department. The registration will be issued by the Department or its authorized agent upon successful completion of an examination and compliance with the provisions of the Rules and Regulations. In order to maintain registration, an installer must attend at least one (1) annual training course approved by the Department prior to March 1 and continue to demonstrate competency in practice to ensure the purpose of this regulation. The registration shall be renewable on January 1 of each year. Failure to renew by March 1 shall result in a late fee equal to one half of the renewal fee. Failure to renew within a calendar year shall require re-examination in order to become registered. Installers licensed at the time of the effective date of this regulation will be exempt from the initial examination.

15.2. The installer's license may be revoked or suspended whenever any provision of these Rules and Regulations is violated pursuant unto the Arkansas Administrative Procedures Act. Each installer must furnish proof of current registration upon request by an authorized agent of the Department.

15.3. It shall be a violation of these Rules and Regulations for an installer to start the actual construction, alteration, repair or extension of any onsite wastewater system without first notifying the Department or its authorized agent 24 hours in advance.

15.4. Installer's registration fee. A fee of fifty dollars ($50.00) shall be levied annually for the registration of each installer. The registration fee shall be made payable to the Arkansas Division of Health and shall be attached to the completed APPLICATION and forwarded to the Arkansas Division of Health.

Section 16. Manufacturers

All septic tank manufacturers doing business in Arkansas must hold a valid registration issued by the Department. A registration fee of one hundred dollars ($100.00) will be levied annually, payable by July 1^st. An annual inspection is required for registration renewal.

Section 17. Penalties

Any person, firm, corporation or association who violates any of the provisions of Act 402 of 1977, as amended, or any Rules and Regulations promulgated under the authority of Act 402 of 1977, as Amended, shall upon conviction, be deemed guilty of a misdemeanor and shall be punished by a fine of not less than one hundred dollars ($100.00) nor more than one thousand dollars ($1,000.00). Installers, Designated Representatives and Septic Tank Manufacturers who do not renew their licenses prior to 60 days after the annual expiration date will be charged a late fee equal to one half (1/2) the annual fee.

Section 18. Severability

If any provisions of these Rules and Regulations, or the application thereof to any person is held invalid, such invalidity shall not affect other provisions or applications of these Rules and Regulations which can effect without the invalid provisions of application, and to this end the provisions hereto are declared to be severable.

Section 19. Repeal

All Regulations and parts of Regulations in conflict herewith are hereby repealed.

Section 20. Certification

This will certify that the foregoing Rules and Regulations Pertaining to Onsite Wastewater Systems, Designated Representatives and Installers were adopted by the Arkansas Board of Health at a regular executive session of said Board held in Little Rock, Arkansas, on the 26th day of October, 2006.

Paul K. Halverson, DrPH, Director Arkansas Division of Health

Dated at Little Rock, Arkansas, this 21^st day of November, 2006

The foregoing Rules and Regulations, copy having been filed in my office, are hereby approved this 28^th day of November, 2006.

Mike Huckabee Governor

Appendix A

Absorption Area Requirements

Percolation Rate (Minutes required for water to drop 1 inch in prepared test hole) square foot per day)	Loading Rate (Required gallon of effluent per
10 - 15	.75
16 - 20	.69
21 - 25	.63
26 - 30	.59
31 - 35	.56
36 - 40	.53
41 - 45	.50
46 - 50	.48
51 - 55	.45
56 - 60	.42
61 - 65	.40
66 - 70	.38
71 - 75	.37

TABLE 1 LOADING RATES FOR RESIDENCES AND COMMERCIAL ESTABLISHMENTS

A. SOILS WITH A MODERATE HYDRAULIC CONDUCTIVITY

SEASONAL WATER TABLE (SWT) DEPTH	BRIEF SWT GPD/Sq. Ft.		MODERATE SWT GPD/Sq.Ft.		LONG SWT GPD/Sq. Ft.
ttttInches	8 Ft. Centers	10 Ft. Centers	8 Ft. Centers	10 Ft. Centers	8 Ft. Centers	10 Ft. Centers
8	0.00	0.00	0.00	0.00	0.00	0.00
9	0.03	0.03	0.01	0.01	0.00	0.00
10	0.06	0.06	0.02	0.02	0.01	0.01
11	0.10	0.10	0.03	0.03	0.02	0.02
12	0.16	0.16	0.05	0.05	0.03	0.03
13	0.22	0.22	0.07	0.07	0.04	0.04
14	0.29	0.29	0.10	0.10	0.05	0.05
15	0.40	0.40	0.13	0.13	0.07	0.07
16	0.51	0.51	0.17	0.17	0.09	0.09
17	0.62	0.63	0.21	0.21	0.11	0.11
18	0.73	0.75	0.24	0.26	0.12	0.13
19	0.75	0.75	0.28	0.30	0.14	0.15
20	0.75	0.75	0.32	0.35	0.17	0.18
21	0.75	0.75	0.36	0.40	0.19	0.20
22	0.75	0.75	0.40	0.44	0.21	0.23
23	0.75	0.75	0.44	0.49	0.23	0.25
24	0.75	0.75	0.48	0.54	0.25	0.28
25	0.75	0.75	0.52	0.59	0.26	0.30
26	0.75	0.75	0.57	0.64	0.28	0.32
27	0.75	0.75	0.60	0.68	0.30	0.34
28	0.75	0.75	0.64	0.73	0.32	0.36
29	0.75	0.75	0.67	0.75	0.34	0.39
30	0.75	0.75	0.71	0.75	0.35	0.41
31	0.75	0.75	0.75	0.75	0.37	0.43
32	0.75	0.75	0.75	0.75	0.39	0.46
33	0.75	0.75	0.75	0.75	0.41	0.48
34	0.75	0.75	0.75	0.75	0.43	0.50
35	0.75	0.75	0.75	0.75	0.45	0.53
36	0.75	0.75	0.75	0.75	0.47	0.55
37	0.75	0.75	0.75	0.75	0.49	0.58
38	0.75	0.75	0.75	0.75	0.51	0.60
39	0.75	0.75	0.75	0.75	0.53	0.63
40	0.75	0.75	0.75	0.75	0.55	0.65
41	0.75	0.75	0.75	0.75	0.57	0.68
42	0.75	0.75	0.75	0.75	0.59	0.70
43	0.75	0.75	0.75	0.75	0.61	0.73
44	0.75	0.75	0.75	0.75	0.63	0.75
45	0.75	0.75	0.75	0.75	0.65	0.75
46	0.75	0.75	0.75	0.75	0.68	0.75
47	0.75	0.75	0.75	0.75	0.70	0.75
48 49	0.75 0.75	0.75 0.75	0.75 0.75	0.75 0.75	0.72 0.75	0.75 0.75

B. SOILS WITH HIGH HYDRAULIC CONDUCTIVITY

SEASONAL WATER TABLE (SWT) DEPTH	BRIEF SWT GPD/Sq. Ft.		MODERATE SWT GPD/Sq.Ft.		LONG SWT GPD/Sq. Ft.
Inches	8 Ft. Centers	10 Ft. Centers	8 Ft. Centers	10 Ft. Centers	8 Ft. Centers	10 Ft. Centers
8	0.00	0.00	0.00	0.00	0.00	0.00
9	0.03	0.03	0.01	0.01	0.00	0.00
10	0.08	0.08	0.03	0.03	0.01	0.01
11	0.14	0.14	0.05	0.05	0.02	0.02
12	0.23	0.23	0.08	0.08	0.04	0.04
13	0.33	0.34	0.11	0.11	0.05	0.06
14	0.42	0.46	0.14	0.15	0.07	0.07
15	0.54	0.60	0.18	0.20	0.09	0.10
16	0.66	0.75	0.23	0.24	0.11	0.12
17	0.79	0.90	0.27	0.29	0.13	0.15
18	0.91	1.05	0.30	0.35	0.15	0.17
19	1.04	1.21	0.35	0.40	0.17	0.20
20	1.17	1.25	0.39	0.46	0.20	0.22
21	1.25	1.25	0.44	0.51	0.22	0.25
22	1.25	1.25	0.48	0.56	0.25	0.28
23	1.25	1.25	0.53	0.62	0.27	0.31
24	1.25	1.25	0.58	0.68	0.30	0.34
25	1.25	1.25	0.62	0.74	0.31	0.37
26	1.25	1.25	0.67	0.80	0.34	0.40
27	1.25	1.25	0.72	0.85	0.36	0.43
28	1.25	1.25	0.76	0.91	0.38	0.45
29	1.25	1.25	0.81	0.96	.040	0.48
30	1.25	1.25	0.85	1.02	0.43	0.51
31	1.25	1.25	0.90	1.08	0.45	0.54
32	1.25	1.25	0.95	1.14	0.47	0.57
33	1.25	1.25	1.00	1.20	0.50	0.60
34	1.25	1.25	1.05	1.25	0.52	0.63
35	1.25	1.25	1.10	1.25	0.55	0.66
36	1.25	1.25	1.15	1.25	0.57	0.69
37	1.25	1.25	1.20	1.25	0.60	0.73
38	1.25	1.25	1.25	1.25	0.63	0.76
39	1.25	1.25	1.25	1.25	0.65	0.79
40	1.25	1.25	1.25	1.25	0.68	0.83
41	1.25	1.25	1.25	1.25	0.71	0.86
42	1.25	1.25	1.25	1.25	0.74	0.90
43	1.25	1.25	1.25	1.25	0.76	0.93
44	1.25	1.25	1.25	1.25	0.79	0.97
45	1.25	1.25	1.25	1.25	0.82	1.01
46	1.25	1.25	1.25	1.25	0.85	1.04
47	1.25	1.25	1.25	1.25	0.88	1.08
48	1.25	1.25	1.25	1.25	0.91	1.12
49	1.25	1.25	1.25	1.25	0.95	1.16
50	1.25	1.25	1.25	1.25	0.98	1.20
51	1.25	1.25	1.25	1.25	1.01	1.24
52	1.25	1.25	1.25	1.25	1.04	1.25
53	1.25	1.25	1.25	1.25	1.08	1.25
54	1.25	1.25	1.25	1.25	1.11	1.25
55	1.25	1.25	1.25	1.25	1.14	1.25
56	1.25	1.25	1.25	1.25	1.18	1.25
57	1.25	1.25	1.25	1.25	1.21	1.25
58	1.25	1.25	1.25	1.25	1.25	1.25

Appendix B QUANTITIES OF WASTEWATER FLOW FOR VARIOUS TYPES OF ESTABLISHMENTS

ESTABLISHMENT TYPE	GALLONS PER DAY
Airports, bus terminals, train stations
Per passenger	5
Add per employee per 8 hour shift	20
Barber & beauty shops per chair	100
Bowling alleys
Toilet wastes per lane	100
For food service, add restaurant usage below
Camps
Campground with central comfort stations per camper	35
Day camps (no meals served) per camper	15
Per non resident camper	50
Per resident camper or employee	75
Churches
Per seat/no food service	5
For food service, add restaurant usage below
For daycares, add school usage below
Commercial establishments excluding deli, bakery, or meat department
Per 100 square feet of floor space	10
Add per 100 square feet of deli floor space	50
Add per 100 square feet of bakery floor space	50
Add per 100 square feet of meat market floor space	100
Country clubs
Per resident member	100
Per non-resident member	25
Dentists offices
Per wet service chair	200
Add per non wet service chair	50
Doctors office
Per practitioner	250
Add per employee per 8 hour shift	20
Factories, exclusive of industrial waste
Gallons per employee per 8 hour shift
No showers provided	20
Showers provided	35
Hospitals
Per bed space	200
For food service excluding patients, add restaurant usage below
Hotels & Motels
Regular per room	150
Resort hotels & cottages	75
Add for establishments with self service laundry facility per machine	750
Institutions per meal served per day	65

Mobile home parks
per single wide mobile home space	300
per double wide mobile home space	450
Nursing homes, rest homes, adult congregate living facilities Per bed	100
Add for food service (see Institutions, this chart)
Office buildings per employee per 8 hour shift	15
Parks, public picnic
Toilets only per person	5
With bath house, showers, & toilets per person	10
Recreation vehicle park
Recreational vehicle space for overnight stay, without water & sewer hookup per vehicle space	75
Recreational vehicle space for overnight stay, With water & without sewer hookup per vehicle space	100
Recreational vehicle space for overnight stay, with water & sewer hookup per vehicle space	150
Restaurants
Per day per seat per meal setting	30
Using single service articles only per seat	25
Bar and cocktail lounge per seat	30
Carry out only
Per meal served without public restrooms	5
Per meal served with public restrooms	10
Add per employee per 8 hour shift	15
Residences
Single or multiple family per dwelling unit
1 bedroom	150
2 bedroom	270
3 bedroom	370
4 bedroom	450
For each additional bedroom add	50
Rooming houses per occupant space	75
Schools per student
Day schools & day cares	15
Add for showers	10
Add for food service	5
Add for day school workers	20
Boarding schools	75
Service stations & convenience stores
Per vehicle served	10
Food service, per meal served	5
Stadiums, race tracks, ball parks per seat	5
Swimming pools and bathhouses per patron	10
Theaters
Indoor, movies/auditorium per seat	5
Outdoor, drive-ins per space	10

Veterinary clinic
Per practitioner	250
Add per employee per 8 hour shift	20
Add per kennel, stall, or cage	20

FOOTNOTES:

The estimated flows for residential systems assume a maximum occupancy of 2 persons per bedroom. Where residential care facilities (non-institutional) will house more than 2 persons in any bedroom, estimated flows are to be increased by 75 gallons per each additional occupant.

Waste from food service operations is commercial in nature and may require special system sizing and treatment/disposal considerations. For food service operations, kitchen wastewater flows are normally to be calculated at 66% of the total wastewater flow. Estimated daily flow is based on 3 meals served per seat per meal setting.

Systems serving high volume establishments, such as fast food restaurants, convenience stores, and service stations require special sizing consideration due to above average wastewater volume expected from restroom facilities.

Appendix C

MINIMUM CAPACITY OF SEPTIC TANKS LIOUID CAPACITY OF TANK (GALLONS)

NUMBER OF BEDROOMS	RESIDENTIAL	COMMERCIAL
1, 2, and 3 4	1000 1250	Capacity equal to 48 hour flow Minimum 1000

Note: For each additional bedroom add 250 gallons.

Appendix D

Requirements for the Approval of Residential Aerobic Treatment units for Distribution in

Arkansas.

Aerobic Treatment units may be used for treating domestic wastewater waste, provided that each unit is installed, operated and maintained in conformance with the following provisions:

1. Aerobic treatment systems designed to treat up to 2,000 gallons of wastewater waste per day shall be tested and listed by an American National Standards Institute (ANSI) certified third party previously approved by the Department. Aerobic treatment units shall be in compliance with the standards for Class I systems as defined by the ANSI/NSF Standard Number 40 (revised 2005).

2. The following additional requirements shall also apply to the construction, design, and operation of aerobic treatment units treating 2,000 gallons per day or less:

a. A visual and audio warning device shall be installed in a conspicuous location so that activation of the warning device will alert property occupants of aerobic unit malfunction or failure. The wiring device shall be wired separately from the ATU so that the disconnecting the ATU from the electrical supply will activate the alarm.

b. Each unit shall be designed or equipped so that regardless of unusual patterns or frequencies of wastewater flow into the system effluent discharged will be in compliance with Class I effluent quality standards as defined by the General NPDES Permit ARG550000, Discharges From Individual Home Treatment Facilities.

c. The minimum required treatment capacities for systems serving any structure, building or group of buildings; shall be based on estimated daily wastewater flows as determined by the Rules and Regulations Pertaining to Onsite Wastewater Systems, Designated Representatives, and installers.

Appendix E

Requirements for becoming an Aerobic Treatment Unit Distributor

The following items are required to become a distributor of aerobic treatment units used for domestic wastewater treatment. Application is made to the Department:

1. A current septic tank installer's license, septic tank manufacturer's license, or a designated representatives license.

2. Factory trained installation and service personnel capable of providing service within 48 hours. Service personnel must also be currently licensed by the Department as a Certified Maintenance Person.

3. A statement from the National Office stating that in the event of the local franchise going out of business, the service contracts in Arkansas will be honored and renewed by another franchise in an adjoining state or region of Arkansas.

4. Provide orientation seminars to Certified Maintenance Personnel and provide parts and seminars to installers certified to repair aerobic treatment units.

Appendix F Requirements for Submission of an Onsite Wastewater System Permit Application

1. All items will be submitted in triplicate to the local health unit with the permit fee

2. Completed Onsite Wastewater System Permit Application Form.

3. Vicinity Map.

4. The drawing to be to scale using either 1 inch = 20 feet or 1 inch = 30 feet. The drawing must indicate the house, all onsite wastewater system components, and all other features affecting the location of primary and secondary absorption areas.

5. The direction of North is to be indicated.

6. Property lines must be defined and their dimensions shown. Dimensions that cannot be indicated by scale must be designated by a shown distance between 2 indicated points. The distance to 2 opposing property lines must be shown to tie the system to one location on the lot.

7. All onsite wastewater system setbacks and their distances must be shown. Structures and their dimensions and all features which affect the locations of system setbacks including the location of utility/service lines must be shown.

8. The driveway and parking area dimensions must be shown.

9. The location and elevation of the water well must be shown along with their distance from all parts of the onsite wastewater system and secondary absorption area. For public water systems, show the distances from the onsite wastewater system's components and secondary absorption area location to the water mains and the water service lines.

10. The location, elevation and distances of all wells and/or onsite wastewater systems on adjoining properties that are within 100 feet of the proposed septic system and secondary absorption area must be shown.

11. Locate and properly size the primary and secondary absorption area and include contour lines or arrows indicating the direction and degree of the lot's slope must be shown.

12. A benchmark must be designated and elevation shots or rod readings must be shown for all parts of the wastewater system. Ground elevation and flow-line elevations must be provided for all system components. This includes the stub-out and the beginning, middle and end of each absorption trench. Each absorption trench shall be designed on contour, not to exceed 2 inches difference in elevation from beginning to end.

13. The tank sizes and locations must be indicated.

14. Unusual soils or topographies that affect the site must be shown and identified. Examples include: excavations, ponds, streams, rock outcrops, drainages, government take lines, etc.

15. The location of percolation test holes on the property must be shown. All percolation test holes used in determining the absorption area size must be within the primary absorption area location.

16. The location of all soil pits on the property must be shown.

17. The flow line elevation of the building sewer stub-out must be indicated on the plans. The flow line elevations of all tank inlets and outlets must be provided. The flow line elevation of the distribution box/device must be provided.

18. The location of the clean out(s) must be shown.

19. Pipe specifications for all parts of the system must be provided.

20. The absorption trench depth must be indicated.

21. The absorption trench media/product must be indicated.

22. Soil information including hydraulic conductivity, redoximorphic features and depth to bedrock found in the primary and secondary absorption areas from the soil pit must be provided.

23. Pumped effluent systems

a. All pertinent data required for conventional system must be provided.

b. Indicate the calculated dose volume.

c. Provide the construction details and inside dimensions on the dose tank.

d. Indicate the length and diameter of the pumped effluent line.

e. Indicate the length and diameter of the pipe from dose chamber to the distribution system.

f. Indicate the elevation difference between the inlet to the distribution system and pump's shut-off elevation.

g. Provide the brand, model number and pump curve of effluent pump specified. Include the calculations used to determine the dose volume per minute and friction head. Provide details of the pump control assembly.

24. Indicate the diversion device to be used and it's location.

25. Systems included in the Onsite Maintenance Program must be submitted with a valid contract with a Certified Maintenance Provider.

DR RESPONSIBILITIES IN APPLICATION SUBMITTAL

The Designated Representative (DR) submits a completed Individual Sewage Disposal System Permit Application (EHP-19) along with detailed plans, specifications, and required fees. This application package is submitted to the appropriate Environmental Health Specialist and/or Local Health Unit.

The following information must be provided on the Individual Sewage Disposal System Permit Application (EHP-19). The requirements for each item are explained below.

The type of application being requested is indicated by checking the appropriate box in the upper right corner of the EHP-19. The permit choices are:

[TICK] NEW INSTALLATION - Any individual sewage system that has not been permitted.

[TICK] ALTERATION/REPAIR

Alteration - Any change or extension to an existing, permitted system. Repair - The restoration of a malfunctioning system to proper function.

The fee amount is calculated from the chart in the upper right corner of the EHP-19 and marked with a check in the appropriate box.

In the first block of Part I (Treatment Type), check the Treatment Type proposed. If the Treatment Type is not listed on the EHP-19, mark Other (OTH).

In the second block of Part I (Disposal Method), check the Disposal Method proposed. If the Disposal Method is not listed on the EHP-19, mark Other (OTH).

The information required for items 1-22 is explained by the item's number as found on the EHP-19:

1. The name of the home or building owner. If the structure is a "spec house," the builder's name can be used, but the homeowner's name should be added prior to the final inspection.

2. The telephone number of the person listed in item 1. This is required in the event the Environmental Health Specialist needs to discuss an issue with the property owner.

3. The mailing address of the person listed in item 1.

4. The county in which the proposed system is located.

5. The address of the proposed system. If a 911 address is not available, simple and accurate directions are required.

6. The name of the subdivision the system is located in. If the proposed system site is not located in a subdivision, mark this space with N/A.

7. The date that the subdivision in item 6 was approved by the Division of Health.

8. The date the subdivision in item 6 was recorded at the county courthouse. If the subdivision was not recorded, mark this space with "not recorded." If the subdivision was filed and recorded prior to July 1, 1977, the permit may be reviewed under either the current regulations or the applicable Bulletin #9. This must be addressed on the permit application. If not applicable, mark this space with N/A.

9. The subdivision lot number of the proposed system. If not applicable, mark this space with N/A.

10. The dimensions, in feet, of the property. These dimensions must correspond to the dimensions shown on the plat drawing. The dimensions must be entered. Do not refer to the plat drawing.

11. The total area of the lot in acres.

12. For residential systems, list the total number of bedrooms. For non-residential systems, list the number of people using the system on a daily basis.

13. Indicate the estimated daily flow in gallons per day (GPD). For residential systems, the gallons per day per bedroom rates used to design the system must be stated. Non-residential systems are based on Appendix B, Quantities of Sewage Flow for Various Types of Establishments, which can be found in the Rules and Regulations Pertaining To Sewage Disposal Systems, Designated Representatives and Installers.

14. Provide a brief legal description for the site of the proposed system. The legal description should be taken down to a minimum of two and one-half (2 1/2) acres.

15. Indicate whether the site will be supplied water by either a public water system or a private well. If the water will be from a public system, list the name of the supplier.

16. Indicate the GPS coordinates (longitude and latitude) of the center of both the primary and secondary disposal sites or the point of discharge, whichever is appropriate.

17. When soil properties are used to design the system, the DR completes item 17, a-h. When percolation tests are used to design the system, the DR records the information for item 17, a-d. Item 17, e-h, are then marked N/A. All boxes must be filled out. Do not leave blank spaces. If a box is not needed, mark N/A. Item 17 is the soil information for the primary disposal site.

a. Record the depth, in inches, to bedrock. For the definition of bedrock, refer to the Division of Health's Bedrock policy.

b. Record the depth, in inches, to the observed brief seasonal watertable.

c. Record the depth, in inches, to the observed moderate seasonal watertable.

d. Record the depth, in inches, to the observed long seasonal watertable.

e. Record the depth, in inches, to the adjusted moderate seasonal watertable.

f. Record the depth, in inches, to the adjusted long seasonal watertable.

g. Record the class and depth of the hydraulic conductivity used to design the system. h. Record the loading rate, in gallons per square foot per day, used in the system design.

18. Record the soil information for the secondary disposal site using the same directions as item 17.

19. This item is applicable when percolation tests are used to size the absorption system. Record the percolation rates as indicated. The percolation rate for the alternate area is not used in finding the average percolation rate.

20. Record the size/dimensions of the proposed system's components.

a. Record the liquid capacity, in gallons, of the septic tank to be used.

b. Record the liquid capacity of the dose tank, in gallons, to be used. If no dose tank is required, mark N/A.

c. Record the size, in square feet, of the absorption area required.

d. Record the number of absorption trenches to be used.

e. Record the length of the absorption trenches. If the absorption trenches are of different lengths, record all lengths used. Absorption trenches of different lengths are only allowed for serial distribution and pressure distribution designs. If more space is needed, use 20, h.

f. Record the depth, in inches, at which the proposed absorption trenches are to be installed.

g. Indicate the minimum absorption trench spacing, center to center, to be used.

Remarks. This space is provided for any additional information the DR deems pertinent.

21. Trench media.

22. Fill out as indicated. With the exception of the DR's signature, all information in this box must be either typed or printed.

23. The Environmental Health Specialist responsible for the system review completes this item. The box provided is checked if the site was visited, the soils examined and the soil properties interpreted.

24. The signature of the person whose name appears in item 1.

These items shall be on or provided with the plot drawing.

1. A Vicinity Map.

2. The drawing to be to scale using either 1 inch = 20 feet or 1 inch = 30 feet. The drawing must indicate the house, all septic system components, and all other features affecting the location of primary and alternate disposal locations.

3. The direction of North must be indicated.

4. Property lines must be defined and their dimensions shown. Dimensions which cannot be indicated by scale must be designated by a shown distance between two indicated points. The distance to two property lines must be shown to tie the system to one location on the lot.

5. Structures and their dimensions must be shown. All features must be shown which affect the locations of system setbacks, including the location of utility/service lines.

6. The driveway and parking area dimensions must be shown.

7. The location and elevation of the water well and water supply line must be shown, along with their distance from all parts of proposed septic system location and alternate disposal location. For public water systems, show the distances from the septic system's components and alternate disposal location to the water mains and the water service lines.

8. The location, elevation and distances of all wells and/or septic systems on adjoining properties that are within 100 feet of the proposed septic system and alternate area must be shown.

9. All septic system setbacks and their distances must be shown.

10. In the primary and alternate (secondary) disposal site locations, contour lines or arrows indicating the direction and degree of the lot's slope must be shown.

11. A bench-mark must be designated and elevation shots or rod readings must be shown for all parts of the sewage system. Ground elevation and flow-line elevations must be provided for all system components. This includes the stub-out and the beginning, middle and end of each absorption trench.

12. The septic tank size and location must be indicated.

13. Unusual soils or topographies that affect the site must be shown and identified. Examples include: excavations, ponds, streams, rock outcrops, drainages, government take lines, etc.

14. The location of percolation test holes on the property must be shown. All percolation test holes used in determining the absorption field size must be within 10 feet of primary disposal field location.

15. The location of all soil pits on the property must be shown.

16. The flow line elevation of the building sewer stub-out must be indicated on the plans. The flow line elevations of septic tank inlet and outlet must be provided.

17. The location of the clean-out(s) must be shown.

18. Pipe specifications for all parts of the system must be provided.

19. The primary absorption area must be properly sized.

20. The absorption trench depth must be indicated.

21. The alternate area must be indicated and properly sized.

22. The soil determination, percolation test or soil pit in the alternate area must be indicated.

23. Soil information in regards to redoximorphic features and bedrock found in the primary disposal site soil pit must be provided.

24. Pumped effluent systems

a. All pertinent data required for a conventional system must be provided. Indicate the calculated dose volume.

b. Provide the dose tank size (item 20b on EHP-19) and the construction details, including the inside dimensions. If a pump vault is used, indicate the proper, increased septic tank size in item 20a and on the plat drawing.

c. Provide details of the control panel, riser, and pump control assembly. Indicate whether the dose interval is controlled by timer or by demand. Specify what brand panel and control assembly are to be used.

d. Calculate the draw down in the dose tank and the show calculations used. Examples are: "On-off" points, elevations inside tank alarms, etc.

e. Provide the brand, model number and pump curve of effluent pump specified. Include the calculations used to determine the dose volume per minute and friction head.

f. Indicate the length and diameter of the pumped effluent line.

g. Indicate the length and diameter of the pipe from dose chamber to the distribution system.

h. Indicate the elevation difference between the inlet to the distribution system and pump's shut-off elevation.

i. Provide details of the distribution system.

25. Indicate any diversion or distribution device to be used and its location.

26. Systems included in the Onsite Maintenance Program must be submitted with a valid contract with a Certified Maintenance Provider.

PRE-SITE REVIEW

1. All major system components shall be staked-out with all stakes identified. Examples include: the stub-out, tank, D-Box,

the four corners of the primary and alternate site, etc.

2. The beginning, middle and end of all laterals shall be flagged.

3. All percolation test holes shall be flagged.

4. All soil pits shall be flagged.

5. The proposed system design must be appropriate for the site: flat ground, pumped effluent, serial distribution, dual absorption field, D-box, dosed, etc.

6. Note observations or other findings.

016.24.06 Ark. Code R. 009

12/6/2006