| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | treatment | treatment | mandatory | CFSGAS Disinfection Requirement | wastewater | For surface water discharge, the system must be followed by disinfection at a minimum to consistently meet discharge standards. | Surface water discharge applications. | high |
| #Q002 | design | operational | recommended | Electrical Component Protection | wastewater | All electrical components should follow NEC code and be waterproof and/or housed from the elements. | Electrical components on onsite package treatment units. | high |
| #Q003 | operational | operational | mandatory | CFSGAS Operator Qualifications | wastewater | CFSGAS systems must be managed and maintained by trained personnel rather than homeowners to perform acceptably. | high | |
| #Q004 | treatment | treatment | mandatory | FFS Disinfection Requirement | wastewater | Fixed-film systems also require a minimum of effluent disinfection to meet surface water discharge requirements. | When surface water discharge is utilized. | high |
| #Q005 | design | treatment | mandatory | FFS Ventilation Oxygen Transfer | wastewater | If natural ventilation is required for aeration, proper design and construction must be considered to ensure adequate oxygen transfer. | Where natural ventilation is employed in fixed-film systems. | high |
| #Q006 | design | operational | recommended | RBC Environmental Protection | wastewater | RBC units should be covered and insulated against cold weather and sunlight. | Applies to rotating biological contactor units. | high |
| #Q007 | prohibition | operational | recommended | SBR Biomass Wasting Restriction | wastewater | No wasting of biomass should be practiced until a satisfactory concentration has developed. | Startup of sequencing batch reactor systems. | high |
| #Q008 | design | treatment | recommended | Disinfection Contact Basin Baffling | wastewater | The contact basin should be baffled to ensure that short-circuiting does not occur. | When using a contact basin for chlorine disinfection. | high |
| #Q009 | design | treatment | mandatory | Chlorine Disinfection Mixing | wastewater | At the point of chlorine addition, mixing is highly desirable and a contact chamber is necessary to ensure maximum disinfection. | During chlorine disinfection. | high |
| #Q010 | design | operational | mandatory | UV Unit Accessibility | wastewater | UV units must be located near a power source and should be readily accessible for maintenance and inspection. | When installing UV disinfection units. | high |
| #Q011 | design | operational | mandatory | UV Unit Controls Integrity | wastewater | Appropriate controls for the unit must be corrosion-resistant and enclosed in accordance with electrical codes. | Applies to UV disinfection system controls. | high |
| #Q012 | monitoring | operational | mandatory | Pretreatment Monitoring | wastewater | Inspections must include all pretreatment steps. | When monitoring UV and chlorination disinfection systems. | high |
| #Q013 | treatment | treatment | mandatory | VSB Aeration Requirement | wastewater | They also require some form of aeration to meet effluent standards for dissolved oxygen (DO). | Vegetated submerged beds (VSBs) producing effluent. | high |
| #Q014 | operational | operational | mandatory | AUF Flushing and Inspection | wastewater | AUF units will require periodic flushing of accumulated solids and inspection of inlet and outlet systems. | Anaerobic upflow filter units. | high |
| #Q015 | design | health | mandatory | Lagoon Public Access Restriction | wastewater | Fencing will normally be required to restrict access by the public. | Aquatic lagoon systems. | high |
| #Q016 | design | operational | mandatory | Phosphorus Removal Construction and Management | wastewater | All the phosphorus removal options require noncorrosive materials of construction, appropriate alarms and sensing systems, and regular management by semiskilled staff. | high | |
| #Q017 | operational | operational | mandatory | Holding Tank Blackwater Removal | wastewater | Blackwater discharged directly to a holding tank requires periodic removal for offsite treatment. | Source separation systems discharging blackwater. | high |
| #Q018 | treatment | treatment | mandatory | Anionic System Pretreatment | wastewater | In the anionic system, septic tank effluent must be nitrified prior to passage through the exchange unit. | Ion exchange physical/chemical treatment systems. | high |
| #Q019 | prohibition | operational | mandatory | ISF Surface Placement Restriction | wastewater | ISF units should never be placed in surface depressions without thoroughly sealing against prolonged inundation and drainage configurations that prevent stormwater entry. | When locating Intermittent Sand Filter units. | high |
| #Q020 | prohibition | operational | mandatory | ISF Filter Fabric Restriction | wastewater | Filter fabric should not be used at any location through which the filtrate would flow. | Construction of Intermittent Sand Filter units. | high |
| #Q021 | monitoring | operational | mandatory | ISF Media Replacement Monitoring | wastewater | Before replacing the media, monitor wastewater flows and concentrations to determine if they are the cause of the problem. | When evaluating premature clogging or ponding prior to media replacement. | high |
| #Q022 | design | operational | mandatory | Recirculation Flow Splitting | wastewater | The return line or the underdrain must split the flow to recycle a portion of the filtrate to the recirculation/dosing tank. | Recirculating sand filters. | high |
| #Q023 | design | operational | mandatory | Recirculating Filter Underdrain Elevation | wastewater | The underdrain outlet invert elevation must be sufficiently above the recirculation tank inlet to accommodate a minimum of 0.1 percent slope on the return line... | Recirculating sand/media filters. | high |
| #Q024 | design | operational | mandatory | Land Treatment Climate Runoff Prevention | wastewater | In wet and cold areas, an additional basin for storage or a larger dosing tank is necessary to eliminate possible runoff from the application area. | Land surface treatment systems in wet and cold areas. | high |
| #Q025 | design | health | mandatory | Spray Irrigation Vegetation and Topography | wastewater | Application areas must be vegetated (with crops not intended for human consumption) and have slopes that preclude runoff to streams. | Spray irrigation systems. | high |
| #Q026 | prohibition | health | mandatory | Spray Irrigation Crop Consumption Prohibition | wastewater | No crops grown on the SI application area should be consumed by humans. | Spray irrigation (SI) areas. | high |
| #Q027 | prohibition | health | mandatory | Household Toxic Waste Prohibition | wastewater | Many common household products have toxic properties and should never be poured down the drain. | Responsibilities of the homeowner for existing or new septic tank/SWIS systems. | high |
| #Q028 | prohibition | operational | mandatory | Improper Solid Waste Disposal Prohibition | wastewater | Items such as cigarette butts, condoms, sanitary napkins, paper towels, and kitty litter should never be flushed or washed down the toilet or sink. | Responsibilities of the homeowner for existing or new septic tank/SWIS systems. | high |
| #Q029 | prohibition | operational | recommended | Septic System Additives Prohibition | wastewater | ...the use of septic system additives containing these or any other ingredients is not recommended. | Septic system usage. | high |
| #Q030 | design | health | mandatory | Holding Tank Watertightness | wastewater | Although similar to septic tanks, vaults have no outlet piping and must be watertight. | Holding tanks or vaults receiving wastewater. | high |
| #Q031 | design | operational | mandatory | Critical Design Boundaries Identification | wastewater | Therefore, all critical design boundaries must be identified and the mass loadings to each carefully considered to properly select the upstream performance and design requirements needed to prevent system failure. | Design boundary and boundary loadings analysis. | high |
| #Q032 | monitoring | operational | mandatory | Soil Hydraulic Capacity Determination | wastewater | The site evaluation must determine the capacity of the soil to hydraulically accept and treat the expected daily mass loadings of wastewater. | During subsurface infiltration system design boundaries and loadings assessment. | high |
| #Q033 | operational | operational | mandatory | Site Evaluator Training | wastewater | Considering the importance of site evaluation with respect to system design, it is imperative that site evaluators have appropriate training to assess receiver sites and select the proper treatment train, size, and physical placement at the site. | Receiving environment evaluations. | high |
| #Q034 | monitoring | health | mandatory | Ground Water Gradient Determination | wastewater | At least three piezometers, installed in a triangular pattern, are necessary to determine ground water gradient and direction of flow... | When deeper water tables require the use of deep borings and possible installation of piezometers or monitoring wells. | high |
| #Q035 | monitoring | operational | recommended | Failure Diagnosis Visual Observation | wastewater | A visual observation of the failure should be made to confirm the information provided. | When a failure is reported. | high |
| #Q036 | administrative | operational | mandatory | RME Oversight Requirement | wastewater | the regulatory authority (RA; e.g., local health department) must oversee the RME to ensure that the program achieves the comprehensive public health and environmental goals of the community. | In jurisdictions where management program responsibilities are delegated to a Responsible Management Entity. | high |
| #Q037 | prohibition | operational | recommended | Site Evaluation Design Conflict Restriction | wastewater | In jurisdictions where performance requirements are used, the regulatory agency should not conduct site evaluations and specify system designs because of potential conflict of interest issues regarding enforcement and compliance... | Applies to regulatory agencies in performance-based jurisdictions. | high |
| #Q038 | administrative | reporting | recommended | System Inventory Maintenance Recommendation | wastewater | USEPA (2000) recommends the establishment and continued maintenance of accurate inventories of all OWTSs within a management entity's jurisdiction as a basic requirement of all management programs. | Fundamental component of onsite wastewater management programs. | high |
| #Q039 | monitoring | operational | recommended | Dosing Pump Annual Recalibration | wastewater | Also, the dosing pump should be recalibrated at least annually. | Regular maintenance of packed bed and media filter systems. | high |
| #Q040 | operational | operational | recommended | Kitchen Waste Management Duty | wastewater | Food wastes should be scraped from plates and utensils and discarded as solid waste. | Homeowner responsibilities to ensure septic tank and SWIS function. | high |
| #Q041 | operational | operational | recommended | Construction Site Staking and Exclusion | wastewater | The site should be staked and roped off before any construction activities begin to make others aware of the site and to keep traffic and materials stockpiles off the site. | Site protection prior to system installation. | high |
| #Q042 | design | treatment | recommended | Infiltration Media Durability Spec | wastewater | The sand or gravel selected should be durable with rounded grains. | Selection of porous medium for subsurface wastewater infiltration systems. | high |
| #Q043 | prohibition | operational | recommended | ISF Surface Placement Recommendation | wastewater | ISF units should never be placed in surface depressions without thoroughly sealing against prolonged inundation and drainage configurations that prevent stormwater entry. | Locating Intermittent Sand Filter units. | high |
| #Q044 | administrative | operational | recommended | Technical Guidelines Establishment Duty | wastewater | The regulatory authority (RA) should set technical guidelines and criteria to ensure effective and functioning onsite wastewater systems. | high | |
| #Q045 | administrative | reporting | recommended | Record Maintenance Duty | wastewater | At a minimum, program managers should maintain records of system permits, design, size, location, age, site soil conditions, complaints, inspection results, system repairs, and maintenance schedules. | high | |
| #Q046 | operational | operational | recommended | Periodic Inspection Policy Requirement | wastewater | RAs should require periodic inspections of systems based on system design life, system complexity, and changes in ownership. | high | |
| #Q047 | administrative | operational | recommended | Service Provider Licensing Standards | wastewater | RAs should establish minimum criteria for licensing/certification of all service providers to ensure protection of health and water resources. | high | |
| #Q048 | administrative | operational | recommended | Program Evaluation Requirement | wastewater | Regular program evaluations should be performed to analyze program methods and procedures, identify problems, evaluate the potential for improvement through new technologies or program enhancements, and ensure funding is available to sustain programs and adjust program goals. | high | |
| #Q049 | monitoring | operational | mandatory | Perpetual System Oversight Duty | wastewater | regulatory agencies need to maintain rigorous, perpetual oversight of systems to ensure periodic tank pumping, maintenance of system components, and prompt response to problems that may present threats to human health or water resources. | high | |
| #Q050 | monitoring | reporting | mandatory | Monitoring Protocol Specificity | wastewater | Strict protocols that identify when, where, and how monitoring will be done, how results will be analyzed, the format in which the results will be presented, and how data will be stored. | Critical elements for a monitoring program. | high |
| #Q051 | monitoring | reporting | recommended | Monitoring QA/QC Requirement | wastewater | Quality assurance and quality control measures that should be followed to ensure credible data. | Critical elements for a monitoring program. | high |
| #Q052 | design | treatment | recommended | Effluent Screen Usage | wastewater | The use of a removable, cleanable effluent screen connected to the outlet is strongly recommended. | Septic tank outlet configuration. | high |
| #Q053 | prohibition | operational | mandatory | Uncontaminated Water Routing Prohibition | wastewater | Uncontaminated water sources (e.g., storm water from rain gutters, discharges from basement sump pumps) must not be routed to the septic tank. | When installing or maintaining onsite systems. | high |
| #Q054 | operational | operational | recommended | Septic Tank Pumping Threshold | wastewater | Tanks should be pumped when sludge and scum accumulations exceed 30 percent of the tank volume or are encroaching on the inlet and outlet baffle entrances. | Standard maintenance practice for septic tanks. | high |
| #Q055 | design | operational | mandatory | Recirculation Tank Redundancy Requirement | wastewater | A redundant pump-off float switch is installed in the recirculation tank below the minimum dose volume level. | Design of recirculating sand/media filters. | high |
| #Q056 | design | reporting | mandatory | Recirculation Tank Alarm Requirement | wastewater | A high water alarm is also installed to provide notice of high water caused by pump failure, loss of pump calibration, or excessive influent flows. | Design of recirculating sand/media filters. | high |
| #Q057 | monitoring | reporting | mandatory | Source Water Assessment Components | drinking water | each assessment must include four major elements: Delineating (or mapping) the source water assessment area; Conducting an inventory of potential sources of contamination in the delineated area; Determining the susceptibility of the water supply to those contamination sources; Releasing the results of the determinations to the public | State source water assessment programs under the 1996 amendments to the Safe Drinking Water Act. | high |
| #Q058 | administrative | operational | recommended | Qualification Program Inclusion | wastewater | A qualifications program that includes certification or licensing procedures for service providers should be incorporated into a management program. | Components of successful onsite wastewater management programs. | high |
| #Q059 | administrative | operational | recommended | Management Repair and Penalty Authority | wastewater | Management entities should also have the authority to carry out repairs or replace systems and, ultimately, to levy civil penalties. | Legal authority for onsite wastewater management programs. | high |
| #Q060 | administrative | operational | recommended | Management Funding Duty | wastewater | Management entities should ensure that there is adequate funding available to support program personnel, education and outreach activities, monitoring and evaluation, and incentives that promote system upgrades and replacement. | Financial components of management programs. | high |
| #Q061 | operational | operational | recommended | Construction Oversight and Certification | wastewater | An approved (i.e., licensed or certified) construction oversight inspector, preferably the designer of the system, should oversee installation and certify that it has been conducted and recorded properly. | Construction and installation oversight for onsite systems. | high |
| #Q062 | operational | operational | mandatory | Construction Process Flexibility | wastewater | The construction process for soil-based systems must be flexible to accommodate weather events because construction during wet weather can compact soils in the infiltration field or otherwise alter soil structure. | Installation of soil-based treatment systems. | high |
| #Q063 | reporting | reporting | mandatory | Maintenance Action Reporting Duty | wastewater | The system owner or designated agent of the owner must report to the department each inspection or maintenance action specified in the management plan at its completion | Operation and maintenance requirements. | high |
| #Q064 | operational | operational | recommended | Excavation Timing and Covering | wastewater | Excavation should be scheduled only when the infiltration surface can be covered the same day to avoid loss of permeability from wind-blown silt or raindrop impact. | During system construction and excavation. | high |
| #Q065 | design | treatment | recommended | Septic Tank Outlet Tee Rising Leg Elevation | wastewater | The rising leg of the tee should extend 6 inches above the liquid level to prevent the scum layer from escaping the tank. | Septic tank outlet baffle design. | high |
| #Q066 | design | treatment | recommended | Septic Tank Outlet Tee Descending Leg Length | wastewater | The descending leg should extend to 30 or 40 percent of the liquid depth. | Septic tank outlet baffle design. | high |
| #Q067 | monitoring | operational | recommended | Septic Tank Riser Testing | wastewater | Risers should be tested. | After all joints have been made and have cured, verifying watertightness of risers. | high |
| #Q068 | design | operational | recommended | Granular Backfill Requirement for Fine Soils | wastewater | In fine-textured soils such as silts, silt loams, clay loams, and clay, imported granular material should be used. | Backfilling septic tanks where freeze and thaw cycles are common. | high |
| #Q069 | design | operational | recommended | Septic Tank Backfill Material Quality | wastewater | The backfill material should be freeflowing and free of stones larger than 3 inches in diameter, debris, ice, or snow. | During bedding and backfilling of septic tanks. | high |
| #Q070 | monitoring | operational | recommended | Pre-Pumping Liquid Level Check | wastewater | Before pumping, the liquid level of the tank should be at the outlet invert level. | Inspection of septic tank watertightness. | high |
| #Q071 | design | reporting | recommended | ATU Alarm Equipment Requirement | wastewater | ATU's should be equipped with audio and visual alarms to warn of compressor/aerator failure and high water. | Design standards for Aerobic Treatment Units. | high |
| #Q072 | design | operational | mandatory | Buried ATU Maintenance Access | wastewater | Buried ATU's must be designed to provide easy access to mechanical parts, electrical control systems, and appurtenances requiring maintenance such as weirs, air lift pump lines, etc. | Design of buried Aerobic Treatment Units. | high |
| #Q073 | administrative | operational | recommended | ATU Ongoing Service Agreements | wastewater | Owners should be required by local sanitary codes or management program requirements to maintain ongoing service agreements for the life of the system. | Maintenance of Aerobic Treatment Units. | high |
| #Q074 | operational | operational | recommended | ATU Pumping Threshold Specification | wastewater | ATU's should be pumped when the mixed-liquor (aerator) solids are above 6,000 mg/L or the final settler is more than 1/3 full of settled solids. | Maintenance of Aerobic Treatment Units. | high |
| #Q075 | operational | treatment | recommended | UV Disinfection Bulb Operation | wastewater | Continuous UV bulb operation is recommended for maximum bulb service life. | Operation of UV disinfection units. | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | chemical | treatment | guidance | total phosphorus | wastewater | requirement | <= 1.0 mg/L | Determine and set specific requirements for onsite systems based on protecting specific management areas and achievement of a specified level of treatment | Within a particular subbasin | high |
| #P002 | chemical | treatment | mandatory | BOD | wastewater | requirement | < 20 mg/L | Performance requirements for Secondary treatment in Florida's performance-based permit program | Secondary treatment: annual arithmetic mean | high |
| #P003 | physical | treatment | mandatory | TSS | wastewater | requirement | < 20 mg/L | Performance requirements for Secondary treatment in Florida's performance-based permit program | Secondary treatment: annual arithmetic mean | high |
| #P004 | microbiological | treatment | mandatory | fecal coliform bacteria | wastewater | requirement | < 200 cfu/100 mL | Performance requirements for Secondary treatment in Florida's performance-based permit program | Secondary treatment: annual arithmetic mean | high |
| #P005 | chemical | treatment | mandatory | total nitrogen | wastewater | requirement | < 20 mg/L | Performance requirements for Advanced secondary treatment in Florida's performance-based permit program | Advanced secondary treatment: annual arithmetic mean | high |
| #P006 | chemical | treatment | mandatory | total phosphorus | wastewater | requirement | < 10 mg/L | Performance requirements for Advanced secondary treatment in Florida's performance-based permit program | Advanced secondary treatment: annual arithmetic mean | high |
| #P007 | chemical | treatment | mandatory | total nitrogen | wastewater | requirement | < 3 mg/L | Performance requirements for Advanced wastewater treatment in Florida's performance-based permit program | Advanced wastewater treatment: annual arithmetic mean | high |
| #P008 | chemical | treatment | mandatory | total nitrogen | wastewater | requirement | <= 25 mg/L | Massachusetts onsite regulations for nitrogen-sensitive areas | Recirculating sand filters or equivalent technologies must limit total nitrogen concentrations in effluent | high |
| #P009 | chemical | treatment | mandatory | nitrate | wastewater | requirement | <= 10 mg/L | Massachusetts onsite regulations for nitrogen-sensitive areas | Unless system effluent meets a nitrate standard of 10 mg/L or other nitrogen removal technologies are used | high |
| #P010 | chemical | health | mandatory | Benzene | drinking water | MAC | 0.005 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P011 | chemical | health | mandatory | Carbon tetrachloride | drinking water | MAC | 0.005 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P012 | chemical | health | mandatory | Arsenic | drinking water | MAC | 0.05 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P013 | chemical | health | mandatory | Barium | drinking water | MAC | 1.0 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P014 | chemical | health | mandatory | Cadmium | drinking water | MAC | 0.010 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P015 | chemical | health | mandatory | Chromium | drinking water | MAC | 0.05 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P016 | chemical | health | mandatory | Lead | drinking water | MAC | 0.05 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P017 | chemical | health | mandatory | Mercury | drinking water | MAC | 0.002 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P018 | chemical | health | mandatory | Nitrate (as N) | drinking water | MAC | 10 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P019 | chemical | health | mandatory | Selenium | drinking water | MAC | 0.01 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P020 | chemical | health | mandatory | Fluoride | drinking water | MAC | 4.0 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P021 | physical | treatment | mandatory | TSS | wastewater | requirement | <= 30 mg/L | Treatment performance requirements for New Shoreham, Rhode Island | T1 (Primary Treatment) | high |
| #P022 | chemical | treatment | mandatory | BOD | wastewater | requirement | <= 30 mg/L | Treatment performance requirements for New Shoreham, Rhode Island | T1 (Primary Treatment) | high |
| #P023 | physical | treatment | mandatory | FOG | wastewater | requirement | <= 15 mg/L | Treatment performance requirements for New Shoreham, Rhode Island | T1 (Primary Treatment) | high |
| #P024 | chemical | treatment | mandatory | Total Nitrogen | wastewater | requirement | < 19 mg/L | Treatment performance requirements for New Shoreham, Rhode Island | T2N (Nitrogen Removal) | high |
| #P025 | microbiological | treatment | mandatory | Fecal Coliform | wastewater | requirement | < 1000 MPN/100 ml | Treatment performance requirements for New Shoreham, Rhode Island | T2C (Pathogen Removal) | high |
| #P026 | chemical | health | mandatory | p-Dichlorobenzene | drinking water | MAC | 0.075 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P027 | chemical | health | mandatory | Trichloroethylene | drinking water | MAC | 0.005 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P028 | chemical | health | mandatory | Vinyl chloride | drinking water | MAC | 0.002 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P029 | chemical | health | mandatory | Nitrate-nitrogen | drinking water, wastewater | requirement | 2 mg/L | Wisconsin's ground water quality rule | Preventive action limit (PAL) | high |
| #P030 | chemical | health | mandatory | Nitrate-nitrogen | drinking water, wastewater | requirement | 10 mg/L | Wisconsin's ground water quality rule | Enforcement limit | high |
| #P031 | microbiological | treatment | mandatory | Fecal coliform | wastewater | requirement | <= 10000 colonies per 100 mL | St. Louis County, Minnesota effluent requirements for systems installed where minimums cannot be met | Natural soil has an unsaturated depth of less than 3 feet but more than 1 foot | high |
| #P032 | microbiological | treatment | mandatory | Fecal coliform | wastewater | requirement | <= 200 colonies per 100 mL | St. Louis County, Minnesota effluent requirements for systems installed where minimums cannot be met | On sites with 1 foot of unsaturated soil or less | high |
| #P033 | chemical | health | mandatory | 1,2-Dichloroethane | drinking water | MAC | 0.005 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P034 | chemical | health | mandatory | 1,1-Dichloroethylene | drinking water | MAC | 0.007 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P035 | chemical | health | mandatory | 1,1,1-Trichloroethane | drinking water | MAC | 0.20 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P036 | chemical | health | mandatory | Nitrite (as N) | drinking water | MAC | 1.0 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P037 | chemical | treatment | mandatory | BOD (Advanced Wastewater Treatment) | wastewater | requirement | < 5 mg/L | Florida's performance-based permit program | Advanced wastewater treatment: annual arithmetic mean | high |
| #P038 | physical | treatment | mandatory | TSS (Advanced Wastewater Treatment) | wastewater | requirement | < 5 mg/L | Florida's performance-based permit program | Advanced wastewater treatment: annual arithmetic mean | high |
| #P039 | chemical | treatment | mandatory | total phosphorus (Advanced Wastewater Treatment) | wastewater | requirement | < 1 mg/L | Florida's performance-based permit program | Advanced wastewater treatment: annual arithmetic mean | high |
| #P040 | microbiological | treatment | mandatory | fecal coliform bacteria (Advanced Wastewater Treatment) | wastewater | requirement | < 25 cfu/100 mL | Florida's performance-based permit program | Advanced wastewater treatment: count for any one sample | high |
| #P041 | chemical | treatment | mandatory | BOD (Advanced Secondary Treatment) | wastewater | requirement | < 10 mg/L | Florida's performance-based permit program | Advanced secondary treatment: annual arithmetic mean | high |
| #P042 | physical | treatment | mandatory | TSS (Advanced Secondary Treatment) | wastewater | requirement | < 10 mg/L | Florida's performance-based permit program | Advanced secondary treatment: annual arithmetic mean | high |
| #P043 | microbiological | treatment | mandatory | fecal coliform bacteria (Advanced Secondary Treatment) | wastewater | requirement | < 200 cfu/100 mL | Florida's performance-based permit program | Advanced secondary treatment: annual arithmetic mean | high |
| #P044 | design | treatment | mandatory | Aggregated design flow (Nitrogen-sensitive areas) | wastewater | requirement | <= 440 gallons per acre per day | Massachusetts onsite regulations for nitrogen-sensitive areas | All systems in nitrogen-sensitive areas must discharge no more than 440 gallons of design flow per acre per day | high |
| #P045 | design | operational | mandatory | Onsite system design flow (Arizona) | wastewater | requirement | < 24000 gallons per day | Arizona's performance-based technical standards | Applies to onsite systems with design flows less than 24,000 gallons per day | high |
| #P046 | chemical | treatment | guideline | BOD (Secondary Treatment) | wastewater | requirement | < 30 mg/L | Proposed onsite system treatment performance standards in various control zones | TS2 (Secondary Treatment) | high |
| #P047 | physical | treatment | guideline | TSS (Secondary Treatment) | wastewater | requirement | < 30 mg/L | Proposed onsite system treatment performance standards in various control zones | TS2 (Secondary Treatment) | high |
| #P048 | chemical | treatment | guideline | BOD (Tertiary Treatment) | wastewater | requirement | < 10 mg/L | Proposed onsite system treatment performance standards in various control zones | TS3 (Tertiary Treatment) | high |
| #P049 | physical | treatment | guideline | TSS (Tertiary Treatment) | wastewater | requirement | < 10 mg/L | Proposed onsite system treatment performance standards in various control zones | TS3 (Tertiary Treatment) | high |
| #P050 | chemical | treatment | guideline | Total Nitrogen (Nutrient Reduction) | wastewater | requirement | < 20 mg/L | Proposed onsite system treatment performance standards in various control zones | TS4 (Nutrient Reduction) | high |
| #P051 | chemical | treatment | guideline | Total Phosphorus (Nutrient Reduction) | wastewater | requirement | < 2 mg/L | Proposed onsite system treatment performance standards in various control zones | TS4 (Nutrient Reduction) | high |
| #P052 | microbiological | treatment | guideline | Fecal Coliform (Tertiary Treatment with Disinfection) | wastewater | requirement | < 200 cfu/100 mL | Proposed onsite system treatment performance standards in various control zones | TS5 (Tertiary Treatment with Disinfection) | high |
| #P053 | design | treatment | mandatory | Vacuum Testing - Vacuum Level | wastewater | requirement | 4 inches Hg | Watertightness testing procedure/criteria for precast concrete tanks | Vacuum testing of septic tanks | high |
| #P054 | design | treatment | mandatory | Vacuum Testing - Allowable Loss | wastewater | requirement | < 0.5 inches Hg | Watertightness testing procedure/criteria for precast concrete tanks | Vacuum testing; hold for 2 minutes | high |
| #P055 | operational | treatment | mandatory | Septic Tank Pumping Threshold | wastewater | requirement | 1/3 tank volume | Wisconsin Department of Commerce maintenance requirements for septic systems | All septic tanks are to be pumped when the combined sludge and scum volume equals one-third of the tank volume | high |
| #P056 | chemical | health | mandatory | Silver (MCL in drinking water) | drinking water | MAC | 0.05 mg/L | MCLs for selected inorganic chemicals in drinking water | high | |
| #P057 | chemical | treatment | mandatory | Nitrogen removal percentage (Massachusetts) | wastewater | requirement | >= 40 percent | Recirculating sand filters or equivalent technologies in nitrogen-sensitive areas | Nitrogen-sensitive areas | high |
| #P058 | operational | operational | mandatory | Keuka Lake Inspection Frequency | wastewater | requirement | 5 years | Intermunicipal agreement for Keuka Watershed Improvement Cooperative | Systems within 200 feet of the lake | high |
| #P059 | operational | treatment | mandatory | Septic Tank Pumping Frequency (Fairfax County) | wastewater | requirement | 5 years | Fairfax County, Virginia management code for onsite systems | high | |
| #P060 | design | treatment | guideline | Suggested hydraulic loading rate for Sand | wastewater | requirement | 0.8-1.2 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Sand; coarse to fine; single grain structure | high |
| #P061 | design | treatment | guideline | Hydraulic loading rate (Loamy sand) | wastewater | requirement | 0.4-0.8 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Loamy sand; coarse to fine; single grain structure | high |
| #P062 | design | treatment | guideline | Hydraulic loading rate (Sandy loam) | wastewater | requirement | 0.4-0.6 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Sandy loam; moderate subangular blocky structure | high |
| #P063 | design | treatment | guideline | Hydraulic loading rate (Loam/Silt loam) | wastewater | requirement | 0.2-0.6 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Loam or Silt loam; moderate subangular blocky structure | high |
| #P064 | chemical | treatment | guideline | Typical residential BOD5 concentration | wastewater | requirement | 155-286 mg/L | Constituent mass loadings and concentrations in typical residential wastewater | Average of 5 studies | high |
| #P065 | physical | treatment | guideline | Typical residential TSS concentration | wastewater | requirement | 155-330 mg/L | Constituent mass loadings and concentrations in typical residential wastewater | Average of 5 studies | high |
| #P066 | chemical | treatment | guideline | Typical residential Total Nitrogen concentration | wastewater | requirement | 26-75 mg/L | Constituent mass loadings and concentrations in typical residential wastewater | Average of 5 studies | high |
| #P067 | chemical | treatment | guideline | Typical residential Total Phosphorus concentration | wastewater | requirement | 6-12 mg/L | Constituent mass loadings and concentrations in typical residential wastewater | Average of 5 studies | high |
| #P068 | chemical | health | mandatory | Endrin (MCL in drinking water) | drinking water | MAC | 0.0002 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P069 | chemical | health | mandatory | Lindane (MCL in drinking water) | drinking water | MAC | 0.004 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P070 | chemical | health | mandatory | Methoxychlor (MCL in drinking water) | drinking water | MAC | 0.1 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P071 | chemical | health | mandatory | Toxaphene (MCL in drinking water) | drinking water | MAC | 0.005 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P072 | chemical | health | mandatory | 2,4-D (MCL in drinking water) | drinking water | MAC | 0.1 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P073 | chemical | health | mandatory | 2,4,5-TP Silvex (MCL in drinking water) | drinking water | MAC | 0.01 mg/L | MCLs for selected organic chemicals in drinking water | high | |
| #P074 | design | operational | mandatory | Standard showerhead flow rate (Post-EPACT) | drinking water | requirement | 2.5 gpm | Flow rates and flush volumes before and after U.S. Energy Policy Act | After 1994 | high |
| #P075 | design | operational | mandatory | Standard faucet flow rate (Post-EPACT) | drinking water | requirement | 2.5 gpm | Flow rates and flush volumes before and after U.S. Energy Policy Act | After 1994 | high |
| #P076 | design | operational | mandatory | Standard toilet flush volume (Post-EPACT) | drinking water | requirement | 1.6 gpf | Flow rates and flush volumes before and after U.S. Energy Policy Act | After 1994 | high |
| #P077 | design | treatment | mandatory | Hydrostatic testing water loss criterion | wastewater | requirement | 0 gallons | Watertightness testing procedure/criteria for precast concrete tanks | Hydrostatic testing of septic tanks | high |
| #P078 | design | treatment | guideline | ISF BOD5 mass loading | wastewater | requirement | < 5 lb/1000 ft^2/day | Specifications, mass loadings, and depth for single-pass intermittent sand filters | Sand media; es = 1.0 mm | high |
| #P079 | design | treatment | guideline | Hydraulic loading rate (Clay loam/Silty clay loam) | wastewater | requirement | 0.1-0.4 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Clay loam or Silty clay loam; moderate subangular blocky structure | high |
| #P080 | design | treatment | guideline | Hydraulic loading rate (Fine sand/Very fine sand) | wastewater | requirement | 0.4-0.6 gpd/ft^2 | Suggested hydraulic and organic loading rates for sizing infiltration surfaces | Fine sand or Very fine sand; single grain structure | high |
| #P081 | design | treatment | mandatory | Septic tank capacity (1-3 bedrooms) | wastewater | requirement | 750 gallons | Septic tank capacities for one- and two-family dwellings | 1 to 3 bedrooms | high |
| #P082 | design | treatment | mandatory | Septic tank capacity (4 bedrooms) | wastewater | requirement | 1200 gallons | Septic tank capacities for one- and two-family dwellings | 4 bedrooms | high |
| #P083 | design | treatment | guideline | CFSGAS Hydraulic Loading | wastewater | requirement | 5-15 gpd/ft^3 | Design parameters for CFSGAS extended aeration package plants | Extended aeration | high |
| #P084 | design | treatment | guideline | CFSGAS Organic Loading | wastewater | requirement | 10-25 lb BOD/1000 ft^3/day | Design parameters for CFSGAS extended aeration package plants | Extended aeration | high |
| #P085 | design | treatment | recommended | UV Intensity Requirement | wastewater | requirement | 35000-70000 mW-s/cm^2 | Typical ultraviolet (UV) system design parameters | For achieving fecal coliform concentrations of about 200 CFU/100 mL | high |
| #P086 | design | treatment | guideline | RSF Gravel Media Hydraulic Loading | wastewater | requirement | 10-15 gpd/ft^2 | Typical design specifications for individual home recirculating sand filters | Media: Gravel (Pea gravel) | high |
| #P087 | operational | operational | guidance | Soil Boring Density | wastewater | requirement | 1 hole per half-acre | Shallow borings for site reconnaissance | Enough borings to adequately characterize site conditions | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | Absorption | The process by which one substance is taken into and included within another substance, such as the absorption of water by soil or nutrients by plants. | high | |
| #D002 | Activated sludge process | A biological wastewater treatment process in which biologically active sludge is agitated and aerated with incoming wastewater. The activated sludge is subsequently separated from the treated wastewater (mixed liquor) by sedimentation, and most of it is returned to the process. The rest is wasted as needed. | high | |
| #D003 | Adsorption | The increased concentration of molecules or ions at a surface, including exchangeable cations and anions on soil particles. The adherence of a dissolved solid to the surface of a solid. | high | |
| #D004 | Aerobic | Having molecular oxygen as a part of the environment, or growing or occurring only in the presence of molecular oxygen, as in 'aerobic organisms.' | high | |
| #D005 | Aerobic treatment unit (ATU) | A mechanical onsite treatment unit that provides secondary wastewater treatment by mixing air (oxygen) and aerobic and facultative microbes with the wastewater. ATUs typically use a suspended growth treatment process (similar to activated sludge extended aeration) or a fixed film treatment process (similar to trickling filter). | high | |
| #D006 | Alternative onsite wastewater treatment system | An onsite treatment system that includes components different from those used in a conventional septic tank and drain field system. An alternative system is used to achieve acceptable treatment and dispersal/discharge of wastewater where conventional systems may not be capable of meeting established performance requirements to protect public health and water resources. (e.g., at sites where high ground water, low-permeability soils, shallow soils, or other conditions limit the infiltration and dispersal of wastewater or where additional treatment is needed to protect ground water or surface water quality). Components that might be used in alternative systems include sand filters, aerobic treatment units, disinfection devices, and alternative SWISs such as mounds, gravelless trenches, and pressure and drip distribution. | high | |
| #D007 | Anaerobic | Characterized by the absence of molecular oxygen, or growing in the absence of molecular oxygen (as in 'anaerobic bacteria'). | high | |
| #D008 | Anaerobic upflow filter | A high-specific-surface anaerobic reactor filled with a solid media through which wastewater flows; used to pretreat highstrength wastewater or to denitrify nitrified wastewater. | high | |
| #D009 | Biochemical oxygen demand (BOD) | A commonly used gross measurement of the concentration of biodegradable organic impurities in wastewater. The amount of oxygen, expressed in milligrams per liter (mg/L), required by bacteria while stabilizing, digesting, or treating organic matter under aerobic conditions is determined by the availability of material in the wastewater to be used as biological food and the amount of oxygen used by the microorganisms during oxidation. | high | |
| #D010 | Biomat | The layer of biological growth and inorganic residue that develops at the wastewatersoil interface and extends up to about 1 inch into the soil matrix. The biomat controls the rate at which pretreated wastewater moves through the infiltrative surface/zone for coarse- to mediumtextured soils. This growth may not control fluxes through fine clay soils, which are more restrictive to wastewater flows than the biomat. | high | |
| #D011 | Blackwater | Liquid and solid human body waste and the carriage waters generated through toilet usage. | high | |
| #D012 | Centralized wastewater treatment system | A wastewater collection and treatment system that consists of collection sewers and a centralized treatment facility. Centralized systems are used to collect and treat wastewater from entire communities. | high | |
| #D013 | Chemical oxygen demand (COD) | A measure of oxygen use equivalent to the portion of organic matter that is susceptible to oxidation by a strong chemical oxidizing agent. | high | |
| #D014 | Chlorine residual | The total amount of chlorine (combined and free available chlorine) remaining in water, sewage, or industrial wastes at the end of a specified contact period following disinfection. | high | |
| #D015 | Clarifiers | Settling tanks that typically remove settleable solids by gravity. | high | |
| #D016 | Class V injection well | A shallow well used to place a variety of fluids at shallow depths below the land surface, including a domestic onsite wastewater treatment system serving more than 20 people. USEPA permits these wells to inject wastes below the ground surface provided they meet certain requirements and do not endanger underground sources of drinking water. | high | |
| #D017 | Clay | A textural class of soils consisting of particles less than 0.002 millimeters in diameter. | high | |
| #D018 | Cluster system | A wastewater collection and treatment system under some form of common ownership and management that provides treatment and dispersal/discharge of wastewater from two or more homes or buildings but less than an entire community. | high | |
| #D019 | Coliform bacteria | A group of bacteria predominantly inhabiting the intestines of humans or other warm-blooded animals, but also occasionally found elsewhere. Used as an indicator of human fecal contamination. | high | |
| #D020 | Colloids | The solids fraction that is described as the finely divided suspended matter that will not settle by gravity and is too large to be considered dissolved matter. | high | |
| #D021 | Compliance boundary | A performance boundary with enforceable performance limits (through an operating permit). | high | |
| #D022 | Consistence | Attribute of soil expressed in degree of cohesion and adhesion, or in resistance to deformation or rupture. Consistence includes the resistance of soil material to rupture; resistance to penetration; the plasticity, toughness, or stickiness of puddled soil material; and the manner in which the soil material behaves when subjected to compression. General classifications of soil consistence include loose, friable, firm, and extremely firm. | high | |
| #D023 | Constructed wetland | An aquatic treatment system consisting of one or more lined or unlined basins, some or all of which may be filled with a treatment medium and wastewater undergoing some combination of physical, chemical, and/or biological treatment and evaporation and evapotranspiration by means of macrophytes planted in the treatment medium. | high | |
| #D024 | Construction permit | A permit issued or authorized by the regulatory authority that allows the installation of a wastewater treatment system in accordance with approved plans and applicable codes. | high | |
| #D025 | Continuous-flow, suspended-growth aerobic system | A typical activated sludge process. | high | |
| #D026 | Conventional onsite system | A wastewater treatment system consisting of a septic tank and subsurface wastewater infiltration system. | high | |
| #D027 | Decentralized system | Onsite and/or cluster wastewater systems used to treat and disperse or discharge small volumes of wastewater, generally from dwellings and businesses that are located relatively close together. Decentralized systems in a particular management area or jurisdiction are managed by a common management entity. | high | |
| #D028 | Denitrification | The biochemical reduction of nitrate or nitrite to gaseous molecular nitrogen or an oxide of nitrogen. | high | |
| #D029 | Digestion | The biological decomposition of organic matter in sludge, resulting in partial gasification, liquefaction, and mineralization. | high | |
| #D030 | Disinfection | The process of destroying pathogenic and other microorganisms in wastewater, typically through application of chlorine compounds, ultraviolet light, iodine, ozone, and the like. | high | |
| #D031 | Dissolved oxygen (DO) | The oxygen dissolved in water, wastewater, or other liquid, usually expressed in milligrams per liter (mg/L), parts per million (ppm), or percent of saturation. | high | |
| #D032 | Dissolved solids | The fraction of solids dissolved in water. | high | |
| #D033 | Drain field | Shallow, covered, excavation made in unsaturated soil into which pretreated wastewater is discharged through distribution piping for application onto soil infiltration surfaces through porous media or manufactured (gravelless) components placed in the excavations. The soil accepts, treats, and disperses wastewater as it percolates through the soil, ultimately discharging to groundwater. | high | |
| #D034 | Effluent | Sewage, water, or other liquid, partially or completely treated or in its natural state, flowing out of a septic tank, subsurface wastewater infiltration system, aerobic treatment unit, or other treatment system or system component. | high | |
| #D035 | Effluent filter | A removable, cleanable device inserted into the outlet piping of the septic tank designed to trap excessive solids due to tank upsets that would otherwise be transported to the subsurface wastewater infiltration system or other downstream treatment components. | high | |
| #D036 | Effluent screen | See Effluent filter. | high | |
| #D037 | Engineered design | An onsite or cluster system that is designed to meet specific performance requirements for a particular site as certified by a licensed professional engineer or other qualified and licensed or certified person. | high | |
| #D038 | Environmental sensitivity | The relative susceptibility to adverse impacts of a water resource or other environments that may receive wastewater discharges. | high | |
| #D039 | Eutrophic | A term applied to water that has a concentration of nutrients optimal, or nearly so, for plant or animal growth. In general, nitrogen and phosphorus compounds contribute to eutrophic conditions in coastal and inland fresh waters, respectively. | high | |
| #D040 | Evapotranspiration | The combined loss of water from a given area and during a specified period of time by evaporation from the soil or water surface and by transpiration from plants. | high | |
| #D041 | Fixed-film wastewater treatment system | A biological wastewater treatment process that employs a medium such as rock, plastic, wood, or other natural or synthetic solid material that will support biomass on its surface. Fixed-film systems include those in which the medium is held in place and is stationary relative to fluid flow (tricking filter), those in which the medium is in motion relative to the wastewater (e.g., rotating biological disk), and dual process systems that include both fixed and suspended biomass together or in a series. | high | |
| #D042 | Graywater | Wastewater drained from sinks, tubs, showers, dishwashers, clothes washers, and other non-toilet sources. | high | |
| #D043 | Hydraulic conductivity | As applied to soils, the ability of the soil to transmit water in liquid form through pores. | high | |
| #D044 | Laminar | Used to describe flat, sheet-like ground water flows that migrate laterally along the upper surface of a confining layer of soil or rock. | high | |
| #D045 | Management entity | An entity similar to a responsible management entity, but managing a limited set of management activities (e.g., homeowners' association, contracted provider of management services). | high | |
| #D046 | Management services | Planning, design, permitting, inspection, construction/installation, operation, maintenance, monitoring, enforcement, and other services required to ensure that the wastewater treatment performance requirements established by the regulatory authority are achieved. Management services should be provided by properly trained personnel and tracked by means of a comprehensive management information system. | high | |
| #D047 | Mineralization | The conversion of an element from an organic form to an inorganic state as a result of microbial decomposition. | high | |
| #D048 | Mottling | Spots or blotches of different colors or shades of color interspersed with the dominant soil color caused in part by exposure to alternating unsaturated and saturated conditions. | high | |
| #D049 | Nitrification | The biochemical oxidation of ammonium to nitrate. | high | |
| #D050 | Nonconventional onsite wastewater treatment system | System using technologies or combinations of technologies that are used where conventional onsite treatment systems cannot meet established performance or prescriptive requirements because of limiting site conditions. Also referred to as Alternative onsite wastewater treatment systems. | high | |
| #D051 | Onsite wastewater treatment system (OWTS) | A system relying on natural processes and/or mechanical components that is used to collect, treat, and disperse/discharge wastewater from single dwellings or buildings. | high | |
| #D052 | Operating permit | A renewable and revocable permit to operate and maintain an onsite or cluster treatment system in compliance with specific operational or performance requirements. | high | |
| #D053 | Organic nitrogen | Nitrogen combined in organic molecules such as proteins and amino acids. | high | |
| #D054 | Organic soil | A soil that contains a high percentage (more than 15 to 20 percent) of organic matter throughout the soil column. | high | |
| #D055 | Package plant | Term commonly used to describe an aerobic treatment unit serving multiple dwellings or an educational, health care, or other large facility. | high | |
| #D056 | Particle size | The effective diameter of a particle, usually measured by sedimentation or sieving. | high | |
| #D057 | Particle-size distribution | The amounts of the various soil size fractions in a soil sample, usually expressed as weight percentage. | high | |
| #D058 | Pathogenic | Causing disease; commonly applied to microorganisms that cause infectious diseases. | high | |
| #D059 | Ped | A unit of soil structure such as an aggregate, crumb, prism, block, or granule, formed by natural processes. | high | |
| #D060 | Perched water table | The permanent or temporary water table of a discontinuous saturated zone in a soil. | high | |
| #D061 | Percolation | The flow or trickling of a liquid downward through a contact or filtering medium. | high | |
| #D062 | Performance-based management program | A program designed to preserve and protect human health and environmental resources by focusing on the achievement of specific, measurable performance requirements based on site assessments. | high | |
| #D063 | Performance boundaries | The point at which a wastewater treatment performance requirement corresponding to the desired level of treatment at that point in the treatment sequence is applied. Performance boundaries can be designated at the discharge point of the pretreatment system (e.g., septic tank, package plant discharge to surface waters), at physical boundaries in the receiving environment (impermeable strata, ground water table), at a point of use (ground water well), or at a property boundary. | high | |
| #D064 | Performance requirement | Any requirement established by the regulatory authority to ensure future compliance with the public health and environmental goals of the community. Performance requirements can be expressed as numeric limits (e.g., pollutant concentrations, mass loads, wet weather flows, structural strength) or narrative descriptions of desired performance, such as no visible leaks or no odors. | high | |
| #D065 | Permeability | The ability of a porous medium such as soil to transmit fluids or gases. | high | |
| #D066 | pH | A term used to describe the hydrogen ion activity of a system. | high | |
| #D067 | Physical boundaries | Points in the flow of wastewater through the treatment system where treatment processes change. A physical boundary can be at the intersection of unit processes or between saturated and unsaturated soil zones. A physical boundary may also be a performance boundary if so designated by the regulatory authority. | high | |
| #D068 | Plastic soil | A soil capable of being molded or deformed continuously and permanently by relatively moderate pressure. | high | |
| #D069 | Platy structure | Laminated or flaky soil aggregate developed predominantly along the horizontal axes. | high | |
| #D070 | Prescriptive-based management program | Program that applies predetermined requirements such as site characteristics, design standards, and separation distances to permit or otherwise allow the operation of onsite wastewater treatment systems. This type of program requires that proposed sites meet preset specifications that are perceived to protect public health and the environment. | high | |
| #D071 | Prescriptive requirements | Standards or specifications for design, siting, and other procedures and practices for onsite or cluster system applications. Proposed deviations from the specified criteria, procedures, or practices require formal approval by the regulatory authority. | high | |
| #D072 | Pretreatment system | Any technology or combination of technologies that precedes discharge to a subsurface wastewater infiltration system or other final treatment unit or process before final dissemination into the receiving environment. | high | |
| #D073 | Regulatory authority (RA) | The level of government that establishes and enforces codes related to the permitting, design, placement, installation, operation, maintenance, monitoring, and performance of onsite wastewater treatment systems. | high | |
| #D074 | Residuals | The solids generated and retained during the treatment of domestic sewage in treatment system components, including sludge, scum, and pumpings from grease traps, septic tanks, aerobic treatment units, and other components of an onsite or cluster system. | high | |
| #D075 | Responsible management entity (RME) | An entity responsible for managing a comprehensive set of activities delegated by the regulatory authority; a legal entity that has the managerial, financial, and technical capacity to ensure the long-term, costeffective operation of onsite and/or cluster water treatment systems in accordance with applicable regulations and performance requirements (e.g., a wastewater utility or wastewater management district). | high | |
| #D076 | Sand filter | A packed-bed filter of sand or other granular materials used to provide advanced secondary treatment of settled wastewater or septic tank effluent. Sand/media filters consist of a lined (e.g., impervious PVC liner on sand bedding) excavation or structure filled with uniform washed sand that is placed over an underdrain system. The wastewater is dosed onto the surface of the sand through a distribution network and allowed to percolate through the sand to the underdrain system, which collects the filter effluent for further processing or discharge. | high | |
| #D077 | Septage | The liquid, solid, and semisolid material that results from wastewater pretreatment in a septic tank, which must be pumped, hauled, treated, and disposed of properly (i.e., in accordance with 40 CFR Part 503). | high | |
| #D078 | Septic tank | A buried, preferably watertight tank designed and constructed to receive and partially treat raw wastewater. The tank separates and retains settleable and floatable solids suspended in the raw wastewater. Settleable solids settle to the bottom to form a sludge layer. Grease and other light materials float to the top to form a scum layer. The removed solids are stored in the tank, where they undergo liquefaction in which organic solids are partially broken down into dissolved fatty acids and gases. Gases generated during liquefaction of the solids are normally vented through the building's plumbing stack vent. | high | |
| #D079 | Sequencing batch reactor | A sequential suspended-growth (activated sludge) process in which all major steps occur in the same tank in sequential order. Sequencing batch reactors include intermittent-flow batch reactors and continuous-flow systems. | high | |
| #D080 | Settleable solids | Matter in wastewater that will not stay in suspension during a designated settling period. | high | |
| #D081 | Silt | A textural class of soils consisting of particles between 0.05 and 0.002 millimeters in diameter. | high | |
| #D082 | Soil horizon | A layer of soil or soil material approximately parallel to the land surface and different from adjacent layers in physical, chemical, and biological properties or characteristics such as color, structure, texture, consistence, and pH. | high | |
| #D083 | Soil map | A map showing the distribution of soil types or other soil mapping units in relation to the prominent physical and cultural features of the earth's surface. | high | |
| #D084 | Soil morphology | The physical constitution, particularly the structural properties, of a soil profile as exhibited by the kinds, thickness, and arrangement of the horizons in the profile and by the texture, structure, consistence, and porosity of each horizon. | high | |
| #D085 | Soil structure | The combination or arrangement of individual soil particles into definable aggregates, or peds, which are characterized and classified on the basis of size, shape, and degree of distinctness. | high | |
| #D086 | Soil survey | The systematic examination, description, classification, and mapping of soils in an area. | high | |
| #D087 | Soil texture | The relative proportions of the various soil separates (e.g., silt, clay, sand) in a soil. | high | |
| #D088 | Soil water | A general term emphasizing the physical rather than the chemical properties and behavior of the soil solution. | high | |
| #D089 | Subsoil | In general, that part of the soil below the depth of plowing. | high | |
| #D090 | Subsurface wastewater infiltration system (SWIS) | An underground system for dispersing and further treating pretreated wastewater. The SWIS includes the distribution piping/units, any media installed around or below the distribution components, the biomat at the wastewater-soil interface, and the unsaturated soil below. | high | |
| #D091 | Topsoil | The layer of soil moved in agricultural cultivation. | high | |
| #D092 | Total Kjeldahl nitrogen (TKN) | An analytical method for determining total organic nitrogen and ammonia. | high | |
| #D093 | Treatment system | Any technology or combination of technologies (treatment trains or unit processes) that discharges treated wastewater to surface waters, ground water, or the atmosphere. | high | |
| #D094 | Unsaturated flow | Movement of water in a soil that is not filled to capacity with water. | high | |
| #D095 | Vegetated submerged bed | A constructed wetland wastewater treatment unit characterized by anaerobic horizontal subsurface flow through a fixed-film medium that has a growth of macrophytes on the surface. | high | |
| #D096 | Water quality-based performance requirement | A specific, measurable, and enforceable standard that establishes limits for pollutant concentrations or mass loads in treated wastewater discharged to ground water or surface waters. | high | |
| #D097 | Water quality criteria | A set of enforceable requirements under the Clean Water Act that establish measurable limits for specific pollutants based on the designated use(s) of the receiving water body. Water quality criteria can be expressed as numeric limits (e.g., pollutant concentrations or mass loads) or narrative descriptions of desired conditions (e.g., no visible scum, sludge, sheens, or odors). | high | |
| #D098 | Water quality standards | A set of enforceable requirements under the Clean Water Act that include classification of receiving waters in accordance with their federal or state designated use(s), use-based water quality criteria that establish measurable limits for specific pollutants, and antidegradation provisions to ensure that water quality is maintained or improved. | high | |
| #D099 | Water table | The level in saturated soil at which the hydraulic pressure is zero. | high | |
| #D100 | Wastewater reuse | The collection and treatment of wastewater for other uses (e.g., irrigation, ornamental ponds, and cooling systems). | high | |
| #D101 | Wastewater recycling | The collection and treatment of wastewater and its reuse in the same water-use scheme, such as toilet and urinal flushing (Tchobanoglous and Burton, 1991). | high | |
| #D102 | Long-term acceptance rate (LTAR) | The volume of wastewater that can be applied to a square foot of soil each day over an indefinite period of time such that the effluent from the onsite system is absorbed and properly treated (North Carolina DEHNR, 1996). | high | |
| #D103 | Aquic moisture regime | Occurs when the soil is saturated with water during long periods, an indicator of possible restrictive horizons, seasonal high water tables, or perched water tables. | high | |
| #D104 | DRASTIC | A standardized system developed by USEPA to rate broad-scale ground water vulnerability using hydrogeologic settings (Aller et al., 1987). | high | |
| #D105 | Unconsolidated material | The material occurring between the earth's surface and the underlying bedrock. | high | |
| #D106 | Solum | The soil portion of unconsolidated material. | high | |
| #D107 | Substratum | The parent material [of unconsolidated material]. | high | |
| #D108 | ETI (evapotranspiration/infiltration process) | A subsurface system designed to dispose of effluent by both evapotranspiration and infiltration into the soil. | high | |
| #D109 | High-specific-surface anaerobic reactor | Any tank or cavity filled with solid media through which wastewater flows with a high hydraulic retention time (HRT). | high | |
| #D110 | Enteric bacteria | Those associated with human and animal wastes. | high | |
| #D111 | Secondary design boundaries | Usually hydraulically restrictive horizons that inhibit vertical percolation through the soil (figure 5-2). | high | |
| #D112 | Underground Injection Control (UIC) program | A program established by the Safe Drinking Water Act to protect underground sources of drinking water from contamination caused by the underground injection of wastes. | high | |
| #D113 | Environmental Technology Verification (ETV) program | A program providing performance information on alternative onsite wastewater treatment technologies. | high | |
| #D114 | Total Maximum Daily Load (TMDL) program | A program published by the Clean Water Act Section 303(d) regarding the development and implementation of pollutant load allocations. | high | |
| #D115 | Design boundaries | Where conditions abruptly change. A design boundary can be at the intersection of unit processes or between saturated and unsaturated soil zones (e.g., the delineation between the infiltrative, vadose, and ground water zones) or at another designated location, such as a drinking water well, nearby surface water, or property boundary. | high | |
| #D116 | Geographic information system (GIS) | Tool to quantify and mitigate nonpoint source nutrient loadings; used to track environmental variables and the performance of new technologies. | high | |
| #D117 | Clean Water State Revolving Fund (CWSRF) | A low-interest or no-interest loan program that has traditionally financed centralized, publicly owned treatment works across the nation; used to support the installation, repair, or upgrading of OWTSs. | high | |
| #D118 | National Onsite Demonstration Project (NODP) | A project established to encourage the use of alternative, decentralized wastewater treatment technologies to protect public health and the environment in small and rural communities. | high | |
| #D119 | Redoximorphic features | Redoximorphic features include iron nodules and mottles that form in seasonally saturated soils by the reduction, translocation, and oxidation of iron and manganese oxides. | high | |
| #D120 | Viability | Viability is defined as the capacity of the RME to protect public health and the environment efficiently and effectively through programs that focus on system performance rather than adherence to prescriptive guidelines. | high | |
| #D121 | Packed bed filters | These contained media filters are also known as packed bed filters. | high | |
| #D122 | ISF | Intermittent sand filter. | high | |
| #D123 | RSF | Recirculating sand filter. | high | |
| #D124 | VSB | Vegetated submerged bed. | high | |
| #D125 | AUF | Anaerobic upflow filter. | high | |
| #D126 | NPDES | National Pollutant Discharge Elimination System. | high | |
| #D127 | LAS | Linear alkylbenzenesulfonate. | high | |
| #D128 | MBAS | Methylene blue active substance. | high | |
| #D129 | FACTS | Failure Analysis Chart for Troubleshooting Septic Systems. | high | |
| #D130 | SSURGO | Soil Survey Geographic database. | high | |
| #D131 | REUWS | Residential End Uses of Water Study. | high | |
| #D132 | AWWARF | American Water Works Association Research Foundation. | high | |
| #D133 | CZARA | Coastal Zone Act Reauthorization Amendments. | high | |
| #D134 | CDBG | Community Development Block Grant. | high | |
| #D135 | IHS | Indian Health Service. | high | |
| #D136 | NOAA | National Oceanic and Atmospheric Administration. | high | |
| #D137 | RBC | Rotating biological contactor. | high | |
| #D138 | UV | Ultraviolet. | high | |
| #D139 | HRT | Hydraulic retention time. | high | |
| #D140 | USPHS | U.S. Public Health Service | high | |
| #D141 | PENNVEST | Pennsylvania Infrastructure Investment Authority | high | |
| #D142 | NOWRA | National Onsite Wastewater Recycling Association | high | |
| #D143 | Part 503 Rule | Rule of the federal Clean Water Act that established requirements for the final use or disposal of sewage sludge when it is applied to land to condition the soil or fertilize crops or other vegetation, deposited at a surface disposal site for final disposal, or fired in a biosolids incinerator. | high | |
| #D144 | TSS | Total suspended solids | high | |
| #D145 | TN | Total nitrogen | high | |
| #D146 | EPACT | U.S. Energy Policy Act | high | |
| #D147 | gpcd | gallons per capita per day | high | |
| #D148 | Capillary fringe | A zone where saturation extends slightly above the water table due to capillary attraction but water is held at less than atmospheric pressure. | high | |
| #D149 | ABS | alkylbenzenesulfonate | high | |
| #D150 | Assimilative capacity | A volume-based (parts of pollutant per volume of water) measurement of the ability of water to decrease pollutant impacts through dilution. | high | |
| #D151 | CPM | Critical Point Monitoring | high | |
| #D152 | BST | bacterial source tracking | high | |
| #D153 | Areas of special concern | Areas where the health officer or department determines additional requirements might be necessary to reduce system failures or minimize potential impacts upon public health. | high | |
| #D154 | HHW | household hazardous waste | high | |
| #D155 | Large-capacity decentralized systems | decentralized wastewater treatment systems that serve more than 20 people | high | |
| #D156 | Drainable porosity | the percentage of pore space drained when the soil is at field capacity | high | |
| #D157 | ET | evapotranspiration | high | |
| #D158 | CFSGAS | Continuous-Flow, Suspended-Growth Aerobic Systems | high | |
| #D159 | FFS | Fixed-film systems | high | |
| #D160 | FWS | Free water surface | high | |
| #D161 | MCLs | Maximum contaminant levels | high | |
| #D162 | BOD 5 | 5-day biochemical oxygen demand | high | |
| #D163 | CBOD 5 | carbonaceous 5-day biochemical oxygen demand | high | |
| #D164 | Responsible Management Entities (RMEs) | legal entities that have the technical, managerial, and financial capacity to ensure viable, long-term, cost-effective centralized management, operation, and maintenance of all systems within the RME's jurisdiction. | high | |
| #D165 | Large-capacity septic systems | serve multiple dwellings, business establishments, and other facilities and are used to dispose of sanitary and other wastes through subsurface application | high | |
| #D166 | Vadose water | Water in this unsaturated zone is referred to as vadose water. | high | |
| #D167 | Contaminant attenuation | removal or inactivation through treatment processes | high | |
| #D168 | Saturated zone | In the saturated zone, all interstices are filled with water under hydrostatic pressure. | high | |
| #D169 | Vadose zone | Interstices in the aerated (upper) vadose zone are unsaturated, filled partially with water and partially with air. | high | |
| #D170 | Total Maximum Daily Loads (TMDLs) | established under section 303 of the Clean Water Act | high | |
| #D171 | Septage | the entire contents of the septic tank—the scum, the sludge, and the partially clarified liquid that lies between them—and also includes pumpings from aerobic treatment unit tanks, holding tanks, biological ('composting') toilets, chemical or vault toilets, and other systems that receive domestic wastewaters. | high | |
| #D172 | Rotating biological contactor (RBC) | A fixed-film biological treatment process that employs rotating disks that move within the wastewater is referred to as a rotating biological contactor (RBC). | high | |
| #D173 | Method for Assessment, Nutrient-loading, and Geographic Evaluation (MANAGE) | a screening-level tool designed for areawide assessment of entire aquifers, wellhead protection areas, or small watersheds. | high | |
| #D174 | Hue | relates to the quality of color | high | |
| #D175 | Value | indicates the degree of lightness or darkness | high | |
| #D176 | Chroma | is the purity of the spectral color. | high | |
| #D177 | Infiltration rate | the rate at which water is accepted by the soil. | high | |
| #D178 | Chlorine demand | The difference between the chlorine residual in the wastewater after some time interval (free and combined chlorine) and the initial dose of chlorine | high | |
| #D179 | Periodic resting | a passive method for restoring the hydraulic capacity of the SWIS. | high | |
| #D180 | Pneumatic soil fracturing | a mechanical treatment used to increase soil porosity by fracturing and lifting the soil surrounding the infiltration surface. | high | |
| #D181 | Holding tank or vault | receives wastewater from a home or commercial establishment and stores it until it is pumped out and hauled to a receiving/processing facility. | high | |
| #D182 | Sequencing batch reactor (SBR) process | a sequential suspended growth (activated sludge) process in which all major steps occur in the same tank in sequential order | high |