[Note: This section contains the SWRCB's and CalRecycle's technical definitions, combined and listed in alphabetical order. Each agency is responsible for adopting its own definitions within this combined listing. Unless otherwise stated in a given regulation, it is the intent of the SWRCB and CalRecycle that each agency's definitions function for the other agency (e.g., when CalRecycle uses a term adopted by the SWRCB, or vice versa, the term has the same meaning as defined by the agency that adopted the term).]

“Abandoned site” (CIWMB) means a site where there is no responsible party.

“Abandoned Vehicles” (CIWMB) includes vehicles, with or without motor power, including cars, trucks, trailers, mobile homes, buses, etc., left on public or private property for an extended period of time and usually in an inoperable or hazardous condition.

“Acceptance for filing” (CIWMB) means the enforcement agency has determined that the application package is complete and correct and the specified permit action time frames contained in Chapter 4 of this subdivision commence.

“Active” (CIWMB) for CIWMB promulgated sections means the period when waste is being accepted for disposal at a disposal site.

“Active Face” (CIWMB) means the working surface of a landfill upon which solid wastes are deposited during the landfill operation, prior to the placement of cover material.

“Active life” or “operating life” (SWRCB) means the period during which wastes are being discharged to a waste management unit. The active life continues until final closure of the waste management unit has been initiated pursuant to this subdivision. For surface impoundments, the active life includes any time when the impoundment contains liquid, including waste and leachate.

“Affected medium” (SWRCB) means any natural medium that consists of or contains waters of the state (e.g., ground water, surface water, or the unsaturated zone) that has been affected by a release from a waste management unit.

“Agricultural Solid Wastes” (CIWMB) include wastes resulting from the production and processing of farm or agricultural products, including manures, prunings and crop residues wherever produced.

“Airport” (CIWMB) means public-use airport open to the public without prior permission and without restrictions within the physical capacities of available facilities.

“Alternative Daily Cover” (CIWMB) see “cover material”.

“Annular Seal” (CIWMB) the seal placed in the space between the casing in a well and the wall of the hole, or between two concentric strings of casing, or between casing and tubing.

“Approval Agency” (CIWMB) includes any agency with regulatory powers regarding solid waste generation, collection, transportation, processing or disposal and includes, but is not limited to the CIWMB, the Department of Toxic Substances Control, California Regional Water Quality Control Boards, local air districts, local enforcement agencies, local health entities and local land use authorities.

“Approved closure plan” (SWRCB) means the portion of a waste management unit's (Unit's) final closure and post-closure maintenance plan that describes all actions necessary to prepare the Unit for post-closure maintenance, and that has been approved by the RWQCB and by any other state and local agencies having purview over that plan.

“Aquifer” (SWRCB) means a geologic formation, group of formations, or part of a formation capable of yielding a significant amount of ground water to wells or springs.

“Attitude” (SWRCB) means either the orientation in space of a geologic structural feature or the structural element position of a geologic bed, stratum, fracture, or surface relative to the horizontal.

“Background” (SWRCB) means the concentrations or measures of constituents or indicator parameters in water or soil that has not been affected by waste constituents or leachate from the waste management unit being monitored.

“Background Monitoring Point” (SWRCB) (as capitalized) means a well, device, or location specified in the waste discharge requirements at which monitoring for background water quality or background soil quality is conducted.

“Background plot” (SWRCB) means an area adjacent to a land treatment unit that can reasonably be expected to have the same, or similar soil conditions as were present at the land treatment unit prior to discharges of waste.

“Baling” (CIWMB) includes the process of compressing and binding solid wastes.

“Bench” (CIWMB) means a terrace or comparatively level platform breaking the continuity of a slope.

“Best management practice(s)” (SWRCB) means a practice, or combination of practices, that is the most effective and feasible means of controlling pollution generated by nonpoint sources for the attainment of water quality objectives.

“Bird hazard” (CIWMB) means an increase in the likelihood of bird/aircraft collisions that may cause damage to the aircraft or injury to its occupants.

“Bulky Waste” (CIWMB) includes large items of solid waste such as appliances, furniture, large auto parts, trees, branches, stumps and other oversize wastes whose large size precludes or complicates their handling by normal collection, processing or disposal methods.

“CAI Units” (SWRCB) means waste management units that were closed, abandoned, or inactive prior to November 27, 1984.

“CalRecycle” (CalRecycle) means the Department of Resources Recycling and Recovery (formerly the California Integrated Waste Management Board), which is the lead agency for implementing the State municipal solid waste permit program that is deemed to be adequate by USEPA under regulations published pursuant to sections 2002 and 4005 of RCRA.

“Capillary force(s)” (SWRCB) means the adhesive force between liquids and solids which, in the case of ground water hydrology, causes soil-pore liquid to move in response to differences in matric potential. This effect causes ground water to rise from a saturated zone into the unsaturated zone, thereby creating a capillary fringe.

“Cell” (CIWMB) means that portion of compacted solid wastes in a landfill that is enclosed by natural soil or cover material during a designated period.

“Certified Engineering Geologists” (CIWMB) means a registered geologist, certified by the State of California, pursuant to section 7842 of the Business and Professions Code.

“CIWMB” (CIWMB) means the California Integrated Waste Management Board, which, as of January 1, 2010, ceased to exist as an agency and became part of (subjoined into) a new Department of Resources Recovery and Recycling (CalRecycle). CalRecycle is the lead agency for implementing the State municipal solid waste permit program that is deemed to be adequate by US EPA under regulations published pursuant to sections 2002 and 4005 of RCRA.

“Classified waste management unit” or “classified Unit” (SWRCB) means a waste management unit (as defined in this section) that has been classified by a Regional Water Quality Control Board according to the provisions of Article 3 Subchapter 2, Chapter 3 of this division (§ 20240 et seq.).

“Classified Unit” -- see “ ‘classified waste management unit' or ‘classified Unit'”

“CLGB” -- see “concentration limit”

“Closed Site” (CIWMB) means a disposal site that has ceased accepting waste and was closed in accordance with applicable statutes, regulations, and local ordinances in effect at the time.

“Closure” (SWRCB) means the process during which a waste management unit (Unit), or portion thereof, that is no longer receiving waste, is undergoing all operations necessary to prepare the Unit (or portion thereof, as appropriate) for post-closure maintenance in accordance with an approved plan for closure, or partial final closure as appropriate.

“Closure Plan” (CIWMB) as used in this division refers to preliminary, final, and/or partial final closure plans as appropriate.

“COC” or “COCs” -- see “Constituents Of Concern”

“Coefficient of variation” (SWRCB) means the standard deviation divided by the mean. It is a statistical measure of the dispersion of individual samples relative to the mean value of the samples.

“Collection” (CIWMB) means the act of collecting solid waste at the place of waste generation by an approved collection agent (public or private) and is distinguished from “removal.”

“Collection Vehicle or Equipment” (CIWMB) includes any vehicle or equipment used in the collection of residential refuse or commercial solid wastes.

“Commercial Solid Wastes” (CIWMB) include all types of solid wastes generated by stores, offices and other commercial sources, excluding residences, and excluding industrial wastes.

“Concentration limit” (SWRCB) means the value for a constituent specified in the water quality protection standard under § 20390 and § 20400, including but not limited to values for concentration, temperature, pH, conductivity, and resistivity. The term can apply to a concentration that exceeds the constituent's background concentration [i.e., a

“concentration limit greater than background (CLGB)” as described under § 20400].

“Concentration limit greater than background (CLGB)” -- see “concentration limit”

“Confined animal facility” (SWRCB) means any place where cattle, calves, sheep, swine, horses, mules, goats, fowl, or other domestic animals are corralled, penned, tethered, or otherwise enclosed or held and where feeding is by means other than grazing.

“Constituent” (SWRCB) means an element or compound which occurs in or is likely to be derived from waste discharged to the waste management unit.

“Constituent(s) of concern” or “COC(s)” (SWRCB) means any waste constituent(s), reaction product(s), and hazardous constituent(s) that is reasonably expected to be in or derived from waste contained in a waste management unit.

“Construction and Demolition Wastes” (CIWMB) include the waste building materials, packaging and rubble resulting from construction, remodeling, repair and demolition operations on pavements, houses, commercial buildings and other structures.

“Construction quality assurance” or “CQA” (SWRCB) means a planned system of activities that provides assurance that the facility, or component thereof, is constructed as specified in the approved design. As used in these regulations, the term includes “Construction quality control” or “CQC”, a planned system of inspections that is used to directly monitor and control the quality of a construction project.

“Containment” (SWRCB) means the use of waste management unit characteristics or installed systems and structures to prevent or restrict the release of waste constituents, including waste constituents mobilized as a component of leachate or of landfill gas.

“Containment feature” (SWRCB) means any feature, whether natural or artificial, used to contain waste constituents, including waste constituents mobilized as a component of leachate or of landfill gas.

“Containment structure” (SWRCB) means an artificial feature designed and installed to contain waste constituents, including waste constituents mobilized as a component of leachate or of landfill gas.

“Contaminated materials” (SWRCB) means materials that contain waste constituents or leachate.

“Control chart” (SWRCB) means a graphical method for evaluating whether a process is or is not in a state of statistical control.

“Coverage” (SWRCB), when applied to financial assurance, means the amount of funds the discharger must make available for a known eventuality (e.g., closure) or potential eventuality (e.g., corrective action).

“Cover Material” (CIWMB) means soils/earthen materials or alternative materials used in covering compacted solid wastes in a disposal site. Cover material may serve as daily, intermediate or final cover. “Alternative Daily Cover” means cover material other than at least six inches of earthen material, placed on the surface of the active face at the end of each operating day to control vectors, fires, odors, blowing litter, and scavenging. “Daily Cover Material” includes that cover material placed on the entire surface of the active face at least at the end of each operating day in order to control vectors, fire, odors, blowing litter and scavenging. “Final Cover Material” means cover material that represents the permanently exposed final surface of a fill. “Intermediate Cover Material” means cover material placed on all fill surfaces where additional cells are not to be constructed for 180 days or more to control vectors, fires, odors, blowing litter, scavenging, and drainage. Intermediate cover does not include final cover as defined in this section.

“CQA” -- see “construction quality assurance”

“CQC” -- refer to “construction quality assurance”

“Critical Slope” (SWRCB) means a potential slip surface or slope on a site that has the lowest factor of safety.

“Cross-contamination” (SWRCB) means a condition created when a drill hole, boring, or improperly-constructed well forms a pathway for fluid movement between a saturated zone which contains pollutants and a formerly separated saturated zone containing uncontaminated ground water.

“Cutoff wall” (SWRCB) means a subsurface barrier to lateral fluid movement which extends from in-place natural geologic materials (which have the required hydraulic conductivity) to ground surface.

“Day” (CIWMB) means calendar day unless otherwise specified.

“Dead Animals” (CIWMB) include those animals whose carcasses or parts thereof require disposal.

“Decomposable waste” (SWRCB) means waste which, under suitable natural conditions, can be transformed through biological and chemical processes into compounds which do not impair the quality of waters of the state. Nevertheless, incomplete decomposition may result in some water quality degradation (e.g., hardness, taste, odor, etc.).

“Decomposition Gases” (CIWMB) include gases produced by chemical or microbial activity during the decomposition of solid waste.

“Dedicated” (SWRCB), when applied to a waste management unit (Unit), means the Unit is used exclusively for discharges of particular wastes.

“Dendritic” (SWRCB) when applied to a waste management unit's subdrain system, means that this system is arranged in a branching pattern.

“Designated waste” (SWRCB) has the same meaning as under California Water Code § 13173.

“Dewatered sludge” (SWRCB) means residual semi-solid waste from which free liquid has been evaporated or otherwise removed.

“Discharger” (SWRCB) means any person who discharges waste which could affect the quality of waters of the state, and includes any person who owns a waste management unit (Unit) or who is responsible for the operation of a Unit. When referring to dischargers of hazardous waste, the terms “discharge” and “waste” in this definition have the same meaning as they would have under the definitions for these terms provided in section 66260.10 of Chapter 11 of Division 4.5 of Title 22, CCR, effective July 1, 1991.

“Discrete unit” (CIWMB) means any portion of the disposal area that can be individually monitored.

“Disposal Area” (CIWMB) means that portion of a disposal site which has received or is receiving solid wastes.

“Dump” (CIWMB) means a disposal site which has waste exposed to the elements, vectors and scavengers.

“Dynamic Conditions” (CIWMB) means under transitory loading conditions, such as during an earthquake.

“EA” (CIWMB) means enforcement agency as defined in PRC § 40130.

“Earthquake Magnitude” (CIWMB) means the Richter scale of earthquake magnitude used to express the total energy of an earthquake.

“Electrical conductivity” (SWRCB) means the relative ability of water to conduct electrical current. It depends on the ion concentration of and can be used to approximate the total filterable residue (total dissolved solids) in the water.

“Environmental Control System” (CIWMB) means a system to prevent the release of waste constituents from the containment structures of sites. Environmental control system for the purpose of this definition does not include systems which primary function is to protect water quality.

“Excess exposure” (SWRCB) means that, for an organism exposed to a release from a waste management unit, the combined effect of all hazardous constituents in the organism's environment is such that the organism will suffer some measurable adverse effect on health or reproductive success, which effect is partly or wholly attributable to the release.

“Existing” (SWRCB), when describing a waste management unit (e.g., “existing surface impoundment”, or “existing Unit”), means that the waste management unit in question was operating, or had received all permits necessary for construction and operation, on or before November 27, 1984, pursuant to § 20080(d).

“Existing Footprint” (SWRCB) (as capitalized) means the area of land, at an MSW landfill, that is covered by waste as of the date that landfill became subject to the federal regulations of 40 CFR Part 258, pursuant to § 258.1 of that part, as published in the Federal Register of October 1, 1993 (Volume 58, No. 189, pages 51546 and 51547). [Note: see also definitions for “Federal Deadline” and “MSW landfill”.]

“Existing MSWLF unit” (CIWMB) (CIWMB usage) means any municipal solid waste landfill unit that is receiving solid waste as of the appropriate dates specified in Section 20060. Waste placement in existing units must be consistent with past operating practices or modified practices to ensure good management.

“External hydrogeologic forces” (SWRCB) means seasonal and other fluctuations in ground water levels, and any other hydraulic condition which could cause a change in the hydraulic stress on a containment structure.

“Facility” -- see “waste management facility”

“Facility Boundary” (CIWMB) means the boundary surrounding the entire area on which solid waste facility activities occur and are permitted.

“Facility wastewater” (SWRCB) means all wastewater, from whatever source, produced at a confined animal facility.

“Factor of safety” (SWRCB) means the ratio of forces resisting slope or foundation failure over forces driving slope or foundation failure.

“Federal Deadline” (SWRCB) applies only to an MSW landfill, and means the compliance date applicable to that landfill or portion thereof pursuant to § 258.1(e) of the federal MSW regulations (40CFR258), as revised in the Federal Register of October 1, 1993 (Volume 58, No. 189, pages 51546 and 51547). The term does not mean the date an MSW landfill must begin monitoring, in that all waste management units subject to these regulations have been required to monitor since the November 27, 1984 version of these regulations (see § 20380 et seq.).

“Fill” (CIWMB) includes compacted solid waste and cover material.

“Flexible membrane liner (FML)” -- see “geosynthetic(s)”

“Floodplain” (SWRCB) means the land area which is subject to flooding in any year from any source.

“FML” -- see “geosynthetic(s)”

“Foundation Failure” (CIWMB) means the failure of a foundation, soil or rock that serves to support an imposed load, along a surface of weakness.

“Freeboard” (SWRCB) means the vertical distance between the lowest point along the top of a surface impoundment dike, berm, levee, or other similar feature and the surface of the liquid contained therein.

“Free liquid” (SWRCB) means liquid which readily separates from the solid portions of waste under ambient temperature and pressure. Free liquids are not present when a 100 milliliter representative sample of the waste can be completely retained in a standard 400 micron conical paint filter for 5 minutes without loss of any portion of the waste from the bottom of the filter (or an equivalent test approved by the Department of Toxic Substances Control).

“Garbage” (CIWMB) includes all kitchen and table food waste, and animal or vegetable waste that attends or results from the storage, preparation, cooking or handling of food stuffs.

“Geologic materials” (SWRCB) means in-place naturally occurring surface and subsurface rock and soil.

“Geologist” (CIWMB) means a person who is engaged in professional geological work under the supervision of registered geologist or registered civil engineer, who is in responsible charge of the work, pursuant to section 7805 of the Business and Professions Code.

“Geomembrane” -- see “geosynthetic(s)”

“Geosynthetic(s)” (SWRCB) (n)means flexible materials in planar form manufactured to meet specific engineering purposes. The term includes, but is not limited to: “geomembrane”, an essentially impermeable membrane used as a barrier to waste solids and fluids, and synonymous with “synthetic liner” and “flexible membrane liner (FML)”; “geocomposite liner (GCL),” a manufactured material using geotextiles, geogrids, geonets, and/or geomembranes in laminated or composite form; “geotextile” (including “geonet”), any permeable textile used with foundation, soil, rock, earth, or any other geotechnical engineering-related material as an integral part of a constructed project, structure, or system.

“Ground acceleration” (SWRCB) means acceleration of earth particles caused by an earthquake.

“Ground rupture” (SWRCB) means disruption of the ground surface due to natural or man-made forces (e.g., faulting, landslides, subsidence).

“Ground water” (SWRCB) for the purpose of the SWRCB-promulgated requirements of this subtitle, means water below the land surface that is at or above atmospheric pressure.

“Grout curtain” (SWRCB) means a subsurface barrier to fluid movement, installed by injecting grout mixtures (such as cement, silicates, synthetic resins, etc.) to fill and seal fractures in rock.

“Hazardous constituent” (SWRCB) means a constituent identified in Appendix VIII to Chapter 11 of Division 4.5 of Title 22, CCR, or an element, chemical compound, or mixture of compounds which is a component of a waste or leachate and which has a physical or chemical property that causes the waste or leachate to be identified as a hazardous waste by the California Department of Toxic Substances Control.

“Hazardous waste” (SWRCB) means any waste which, under Article 1, Chapter 11, Division 4.5 (§ 66261.3 et seq.) of Title 22 of this code, is required to be managed according to Division 4.5 of Title 22 of this code.

“Head” or “hydraulic head” (SWRCB) means the pressure exerted by fluid on a given area. It is caused by the height of the fluid surface above the area.

“Holding facilities” (CIWMB) means sedimentation basins/ponds designed to control suspended solids entrained in surface run-off, prior to discharge.

“Holocene fault” (SWRCB) means a fault which is or has been active during the last 11,000 years.

“Household waste” (CIWMB) means any solid waste (including garbage, trash, and sanitary waste in septic tanks) derived from households (including single and multiple residences, hotels and motels, bunkhouses, ranger stations, crew quarters, campgrounds, picnic grounds, and day-use recreation areas).

“Hydraulic conductivity” (SWRCB) means the ability of natural and artificial materials to transmit fluid. For water, including aqueous solutions, the term is expressed as a measure of the rate of flow (e.g., cubic centimeters per second) one can expect through a unit-area (e.g., one square centimeter) cross section of the material when the hydraulic gradient is unity (e.g., one centimeter of head loss per centimeter of travel through the material). The resulting numerical value is expressed in velocity units (e.g., centimeters per second).

“Illegal Site” (CIWMB) means a disposal site that is not permitted and not exempt from obtaining a permit and is not closed or excluded from the requirement to obtain a SWFP.

“Inactive” (SWRCB) means a temporary status of a waste management unit (Unit), following the initial receipt of waste, in which the Unit is no longer receiving waste.

“Inactive mining waste management unit” (SWRCB) means any area containing mining wastes which is located at a present or former mining or milling site, and where all mining operations and discharges of mining waste ended and have not been resumed for 5 years, or more.

“Inactive Site” (CIWMB) means a site that is temporarily idle for a specific period due to known circumstances and not part of the normal operation pattern contained in the solid waste facility permit.

“Incinerator” (CIWMB) includes any equipment used for the volume reduction or destruction of combustible wastes by burning, from which the exhaust gases pass through a flue.

“Incinerator Residue” (CIWMB) includes the solid materials remaining after reduction in an incinerator.

“Independent sample” (SWRCB) means an individual sample of a monitored medium, obtained from a given Monitoring Point, that:

“Measurably significant” (SWRCB) means a change in the Monitoring Point data that, relative to the reference background value (or other approved reference value or distribution), is sufficient to indicate that a release has occurred, pursuant to the applicable data analysis method (including its corresponding trigger).

“Medical Waste” (CIWMB) means waste regulated pursuant to the Medical Waste Management Act, Part 14 (commencing with Section 117600) of Division 104 of the Health and Safety Code.

“Mining waste” (SWRCB) means all waste materials (solid, semi-solid, and liquid) from the mining and processing of ores and minerals including soil, waste rock, and other forms of overburden as well as tailings, slag, and other processed mining wastes.

“Moisture-holding capacity” (SWRCB) means the amount of liquid which can be held against gravity by waste materials without generating free liquid.

“Monitoring parameter” (SWRCB) means one of the set of parameters specified in the waste discharge requirements for which monitoring is conducted. Monitoring parameters include physical parameters, waste constituents, reaction products, and hazardous constituents, that provide a reliable indication of a release from a waste management unit.

“Monitoring Point” (SWRCB) (as capitalized) means a well, device, or location specified in the waste discharge requirements at which monitoring is conducted and at which the water quality protection standard, under § 20390, applies.

“Municipal solid waste,” or “MSW” (SWRBC) has the same meaning as under 40 CFR, Part 258.

“MSW landfill” or “municipal solid waste landfill unit” (SWRCB) means any landfill that is subject to the federal regulations of 40CFR258, including any portion of a disposal site that is subject to those regulations. The term includes any landfill, other than a Class I landfill, that received municipal solid waste (MSW) at any time and that has received any solid waste since October 9, 1991; therefore, the term does not include any landfill that stopped receiving waste prior to that date.

“New Unit” (SWRCB), when applied to a waste management unit (Unit) or portion thereof, means that the Unit (or portion thereof) began operating, or had received all permits necessary for construction and operation, after November 27, 1984, pursuant to § 20080(d).

“New MSWLF unit” (CIWMB) means any municipal solid waste landfill unit that has not received waste prior to the operative date of October 9, 1993, or prior to October 9, 1997 if the MSWLF unit meets the conditions of 40 CFR 258.1(f)(1).

“Nonhazardous solid waste” (SWRCB) has the same meaning as under § 20220(a).

“Nuisance” (SWRCB) has the same meaning as under Water Code § 13050(m).

“Nuisance” (CIWMB) for CIWMB-promulgated sections includes anything which is injurious to human health or is indecent or offensive to the senses and interferes with the comfortable enjoyment of life or property, and affects at the same time an entire community, neighborhood, household or any considerable number of persons although the extent of annoyance or damage inflicted upon an individual may be unequal and which occurs as a result of the storage, removal, transport, processing or disposal of solid waste.

“On-site” (CIWMB) means located within the permitted boundary.

“Open burning” (CIWMB) means the combustion of solid waste without:

“Overpulling” (CIWMB) means excessive air intrusion into a disposal site during gas extraction to control the migration of landfill gas or to increase the production of landfill gas in an energy production system or flare.

“Partial Final Closure” (CIWMB) means the closure of discrete units of a site consistent with the approved closure and postclosure maintenance plan.

“Peak stream flow” (SWRCB) means the maximum expected flow of surface water at a waste management facility from a tributary watershed for a given recurrence interval.

“Peer-reviewed” (CIWMB) means published and independently reviewed by other experts within the same academic field.

“Perched ground water” (SWRCB) means a body of unconfined ground water separated from the zone of saturation by a portion of the unsaturated zone. Such perched water can be either permanent or ephemeral.

“Permeability” (SWRCB) means the ability of natural and artificial materials to transmit fluid.

“Physical parameter” (SWRCB) means any measurable physical characteristic of a substance including, but not limited to, temperature, electrical conductivity, pH, and specific gravity.

“Point of Compliance” (SWRCB) (as capitalized) means a vertical surface located at the hydraulically downgradient limit of a waste management unit (Unit) and that extends through the uppermost aquifer underlying the Unit.

“Post-closure maintenance” (SWRCB) means all activities undertaken at a closed waste management unit to maintain the integrity of containment features and to monitor compliance with applicable performance standards.

“Post-closure maintenance period” (SWRCB) means the period after closure of a waste management unit (Unit) during which the waste in the Unit could have an adverse effect on the quality of the waters of the state.

“Postclosure maintenance plan” (CIWMB) as used in this division refers to preliminary, final, and/or partial final postclosure maintenance plans as appropriate.

“Premises” (CIWMB) includes a tract or parcel of land with or without habitable buildings or appurtenant structures.

“Principal Gases” (CIWMB) means the organic or inorganic constituents of landfill gas, greater than one percent by volume, that typically include carbon dioxide, methane, oxygen, and nitrogen.

“Private Access” (CIWMB) means that public access and disposal are not allowed.

“Probable maximum precipitation” (SWRCB) means the estimated amount of precipitation for a given duration, drainage area, and time of year, which approaches and approximates the maximum that is physically possible within the limits of contemporary hydrometeorological knowledge and techniques. The term describes a precipitation event that has virtually no risk of being exceeded.

“Professional Land Surveyor” (CIWMB) means a land surveyor licensed by the State of California pursuant to section 8747 of the Business and Professions Code.

“Putrescible Wastes” (CIWMB) include wastes that are capable of being decomposed by micro-organisms with sufficient rapidity as to cause nuisances because of odors, gases or other offensive conditions.

“P-value” (SWRCB) means the smallest significance level for which the null hypothesis would be rejected, based on the data that was actually observed.

“Rapid geologic change” (SWRCB) means alteration of the ground surface through such actions as landslides, subsidence, liquefaction, and faulting.

“R Chart (range chart)” (SWRCB) means a control chart for evaluating the variability within a process in terms of the subgroup range R.

“Reconstruction” (SWRCB) means modification to an existing waste management unit (Unit) which entails costs amounting to 50 percent or more of the initial cost of the Unit.

“Refuse” (CIWMB) includes garbage and rubbish.

“Regional Water Quality Control Board” -- see “RWQCB”

“Registered Civil Engineer” (CIWMB) means a civil engineer registered by the State of California, pursuant to section 6762 of the Business and Professions Code.

“Registered Geologist” (CIWMB) means a geologist registered by the State of California, pursuant to section 7842 of the Business and Professions Code.

“Regulated Hazardous Waste” (CIWMB) means a hazardous waste, as defined in § 66260.10 of Division 4.5 of Title 22 of this code.

“Relative compaction” (SWRCB) means the degree of compaction achieved, as a percentage of the laboratory compaction, in accordance with accepted civil engineering practices.

“Removal” (CIWMB) means the act of taking solid wastes from the place of waste generation either by an approved collection agent or by a person in control of the premises.

“Removal Frequency” (CIWMB) means frequency of removal of solid wastes from the place of waste generation either by an approved collection agency or by the owner of the waste, or frequency of removal of recyclables at facilities which separate recyclables from the waste stream.

“Rubbish” (CIWMB) includes non-putrescible solid wastes such as ashes, paper, cardboard, tin cans, wood, glass, bedding, crockery, plastics, rubber by-products or litter.

“Run-off” (SWRCB) means any precipitation, leachate, or other liquid that drains from any part of a waste management unit (Unit).

“Run-on” (SWRCB) means any precipitation or other liquid that drains onto any part of a waste management unit.

“RWQCB” or “Regional Water Quality Control Board” (SWRCB) has the same meaning as does the latter term, as described under Division 7 of the California Water Code.

“RWQCB-Permitted Area” (SWRCB) (as capitalized) means the portion of land designated in WDRs for the discharge of waste at a waste management unit.

“Salvaging” (CIWMB) means the controlled removal of waste material for utilization.

“Saturated zone” (SWRCB) means an underground zone in which all openings in and between natural geologic materials are filled with water.

“Scavenging” (CIWMB) means the uncontrolled and/or unauthorized removal of solid waste materials, or recyclable material at a solid waste facility.

“Semi-solid waste” (SWRCB) means waste containing less than 50 percent solids.

“Sensitive biological receptor of concern” (SWRCB) means a member of any species of organism whose members are likely to be exposed to a release from a waste management unit and experience some measurable adverse effect as a result of that exposure.

“Septic Tank Pumpings” (CIWMB) include sludge and wastewater removed from septic tanks.

“Shredding” (CIWMB) includes a process of reducing the particle size of solid wastes through use of grinding, shredding, milling or rasping machines. Shredding for the purposes of this Division does not apply to shredding of waste tires.

“Site-Specific” (CIWMB) means specific to the local site.

“Slope Failure” (SWRCB) means the downward and outward movement of ground slopes (e.g., natural rock, soils, artificial fills, or continuations of these materials).

“Sludge” (SWRCB) means residual solids and semi-solids from the treatment of water, wastewater, and other liquids. It does not include liquid effluent discharged from such treatment processes.

“Soil Engineer” (CIWMB) is synonymous with geotechnical engineer; means a registered civil engineer that is qualified to use the title of “soil engineer,” pursuant to California Code of Regulations, Title 16, section 426.50.

“Soil-pore liquid” (SWRCB) means the liquid contained in openings between particles of soil in the unsaturated zone.

“Solid Waste Management” (CIWMB) includes a planned program for effectively controlling the generation, storage, collection, transportation, processing and reuse, conversion or disposal of solid wastes in a safe, sanitary, aesthetically acceptable, environmentally sound and economical manner. It includes all administrative, financial, environmental, legal and planning functions as well as the operational aspects of solid waste handling, disposal and resource recovery systems necessary to achieve established objectives.

“Sorbent” (SWRCB) means a substance which takes up and holds a liquid either by absorption or adsorption.

“Special Waste” (CIWMB) means “special waste” as defined in Title 22.

“State Minimum Standards” (CIWMB) means the following sections of this Subdivision for the purposes of implementing Public Resources Code Section 44104: 20510 to 20701, 20710 to 20937, 21100 to 21200, 21430 and 21600.

“State Water Resources Control Board” -- see “SWRCB”

“Static Conditions” (SWRCB) means under conditions of no external motions or forces, such as those of earthquakes.

“Statistically significant” (SWRCB) means a statistical test has a p-value that is small enough for the null hypothesis to be rejected.

“Storage” (SWRCB) means the holding of waste or recyclable materials for a temporary period, at the end of which the materials either is treated or is discharged elsewhere.

“Store” (CIWMB) means stockpile, accumulate for later use or discard. [Note: this standard does not apply to waste tires.]

“Storm” (SWRCB) means the maximum precipitation for a given duration that is expected during the given recurrence interval [e.g., a 24-hour (duration) 100 year (recurrence interval) storm].

“Surface impoundment” (SWRCB) means a waste management unit which is a natural topographic depression, excavation, or diked area, which is designed to contain liquid wastes or wastes containing free liquids, and which is not an injection well.

“SWRCB” (SWRCB) means the State Water Resources Control Board, as described under Division 7 of the Water Code.

“Synthetic liner” -- see “geosynthetic(s)”

“Tailings pond” (SWRCB) means an excavated or diked area which is intended to contain liquid and solid wastes from mining and milling operations.

“Trace Gases” (CIWMB) means all other organic or inorganic compounds or elements, measured at less than one percent by volume, found together with the principal gases in landfill gas, and may include vinyl chloride, benzene, hydrogen sulfide, carbon monoxide, hydrogen, mercury, etc.

“Transmissivity” (SWRCB) means the rate at which water of the prevailing kinematic viscosity is transmitted through a unit width of the aquifer under a unit hydraulic gradient.

“Treatment” (SWRCB) means any method, technique, or process designed to change the physical, chemical, or biological characteristics of waste so as to render it less harmful to the quality of the waters of the state, safer to handle, or easier to contain or manage. The term includes use of waste as a fuel, nutrient, or soil amendment.

“Treatment zone” (SWRCB) means a soil area of the unsaturated zone of a land treatment unit within which constituents of concern are degraded, transformed, or immobilized.

“Underlying ground water” (SWRCB), for the purposes of waste management unit siting criteria, includes water which rises above the zone of saturation due to capillary forces.

“Unit” -- see “waste management unit”

“Unsaturated zone” (SWRCB) means the zone between the ground surface and the regional water table or, in cases where the uppermost aquifer is confined, the zone between the ground surface and the top of the saturated portion of the aquifer's confining layer.

“Unstable Areas” (CIWMB) means locations susceptible to natural or human-induced events or forces which are capable of rupturing the site containment structure.

“Uppermost aquifer” (SWRCB) means the geologic formation nearest the natural ground surface that is an aquifer, as well as lower aquifers that are hydraulically interconnected with this aquifer.

“Vector” (CIWMB) includes any insect or other arthropod, rodent, or other animal capable of transmitting the causative agents of human disease, or disrupting the normal enjoyment of life by adversely affecting the public health and well being.

“Waste constituent” (SWRCB) means a constituent that is reasonably expected to be in or derived from waste contained in a waste management unit.

“Waste management facility” or “facility” (SWRCB) means the entire parcel of property at which waste discharge operations are conducted. Such a facility may include one or more waste management units.

“Waste management unit” or “Unit” (SWRCB) (the latter capitalized or in quotes at the beginning of a sentence) means an area of land, or a portion of a waste management facility, at which waste is discharged. The term includes containment features and ancillary features for precipitation and drainage control and for monitoring.

“Waste pile” (SWRCB) means a waste management unit (Unit) at which only noncontainerized, bulk, dry solid waste is discharged and piled for treatment or storage on an engineered liner system that prevents the waste from contacting the underlying land surface. The term does not include a Unit of similar construction which is used for waste disposal (such a Unit would be a landfill).

“Water quality impairment” (SWRCB) means degradation of the existing quality of a body of surface or ground water resulting from a release of waste constituents, waste-derived hazardous constituents, or reaction products, including but not limited to any incomplete decomposition product which could cause nuisance by odor.

“Water Standard” (SWRCB) (as capitalized) means the water quality protection standard under § 20390.

“WDRs” (SWRCB) means waste discharge requirements.

“X Bar chart” (SWRCB) means a control chart for evaluating the process level or subgroup differences in terms of the subgroup average.

“Zone of saturation” (SWRCB) means the subsurface zone which extends downward from the base of the unsaturated zone in which the interstices are filled with water under pressure that is equal to or greater than atmospheric pressure. Although the zone can contain gas-filled interstices (in which the gas pressure exceeds atmospheric pressure) or interstices filled with fluids other than water, it is still considered saturated.