| #D001 | | Application Area | Is the area of the treated waterbody to which lanthanum-modified clay is directly applied. | high |
| #D002 | | Arithmetic Mean ( μ ) | Also called the average, is the sum of measured values divided by the number of samples. For ambient water concentrations, the arithmetic mean is calculated as follows: where: Σ x is the sum of the measured ambient water concentrations, and n is the number of samples. | high |
| #D003 | | Average Monthly Effluent Limitation (AMEL) | The highest allowable average of daily discharges over a calendar month, calculated as the sum of all daily discharges measured during a calendar month divided by the number of daily discharges measured during that month. | high |
| #D004 | | Average Weekly Effluent Limitation (AWEL) | The highest allowable average of daily discharges over a calendar week (Sunday through Saturday), calculated as the sum of all daily discharges measured during a calendar week divided by the number of daily discharges measured during that week. | high |
| #D005 | | Bioaccumulative | Those substances taken up by an organism from its surrounding medium through gill membranes, epithelial tissue, or from food and subsequently concentrated and retained in the body of the organism. | high |
| #D006 | | Carcinogenic | Pollutants are substances that are known to cause cancer in living organisms. | high |
| #D007 | | Coefficient of Variation (CV) | CV is a measure of the data variability and is calculated as the estimated standard deviation divided by the arithmetic mean of the observed values. | high |
| #D008 | | Daily Discharge | Daily Discharge is defined as either: (1) the total mass of the constituent discharged over the calendar day (12:00 am through 11:59 pm) or any 24-hour period that reasonably represents a calendar day for purposes of sampling (as specified in the permit), for a constituent with limitations expressed in units of mass or; (2) the unweighted arithmetic mean measurement of the constituent over the day for a constituent with limitations expressed in other units of measurement (e.g., concentration). The daily discharge may be determined by the analytical results of a composite sample taken over the course of one day (a calendar day or other 24-hour period defined as a day) or by the arithmetic mean of analytical results from one or more grab samples taken over the course of the day. For composite sampling, if 1 day is defined as a 24-hour period other than a calendar day, the analytical result for the 24-hour period will be considered as the result for the calendar day in which the 24-hour period ends. | high |
| #D009 | | Detected, but Not Quantified (DNQ) | DNQ are those sample results less than the reporting limit (RL), but greater than or equal to the laboratory's method detection limit (MDL). Sample results reported as DNQ are estimated concentrations. | high |
| #D010 | | Effluent Concentration Allowance (ECA) | ECA is a value derived from the water quality criterion/objective, dilution credit, and ambient background concentration that is used, in conjunction with the coefficient of variation for the effluent monitoring data, to calculate a long-term average (LTA) discharge concentration. The ECA has the same meaning as wasteload allocation (WLA) as used in U.S. EPA guidance ( Technical Support Document for Water Qualitybased Toxics Control , March 1991, second printing, EPA/505/2-90-001). | high |
| #D011 | | Enclosed Bays | Enclosed Bays means indentations along the coast that enclose an area of oceanic water within distinct headlands or harbor works. Enclosed bays include all bays where the narrowest distance between the headlands or outermost harbor works is less than 75 percent of the greatest dimension of the enclosed portion of the bay. Enclosed bays include, but are not limited to, Humboldt Bay, Bodega Harbor, Tomales Bay, Drake's Estero, San Francisco Bay, Morro Bay, Los Angeles-Long Beach Harbor, Upper and Lower Newport Bay, Mission Bay, and San Diego Bay. Enclosed bays do not include inland surface waters or ocean waters. | high |
| #D012 | | Estimated Chemical Concentration | The estimated chemical concentration that results from the confirmed detection of the substance by the analytical method below the minimum level (ML) value. | high |
| #D013 | | Estuaries | Estuaries means waters, including coastal lagoons, located at the mouths of streams that serve as areas of mixing for fresh and ocean waters. Coastal lagoons and mouths of streams that are temporarily separated from the ocean by sandbars shall be considered estuaries. Estuarine waters shall be considered to extend from a bay or the open ocean to a point upstream where there is no significant mixing of fresh water and seawater. Estuarine waters included, but are not limited to, the Sacramento-San Joaquin Delta, as defined in Water Code section 12220, Suisun Bay, Carquinez Strait downstream to the Carquinez Bridge, and appropriate areas of the Smith, Mad, Eel, Noyo, Russian, Klamath, San Diego, and Otay rivers. Estuaries do not include inland surface waters or ocean waters. | high |
| #D014 | | Inland Surface Waters | All surface waters of the State of California (State) that do not include the ocean, enclosed bays, or estuaries. | high |
| #D015 | | Instantaneous Maximum Effluent Limitation | The highest allowable value for any single grab sample or aliquot (i.e., each grab sample or aliquot is independently compared to the instantaneous maximum limitation). | high |
| #D016 | | Instantaneous Minimum Effluent Limitation | The lowest allowable value for any single grab sample or aliquot (i.e., each grab sample or aliquot is independently compared to the instantaneous minimum limitation). | high |
| #D017 | | Maximum Daily Effluent Limitation (MDEL) | The highest allowable daily discharge of a pollutant, over a calendar day (or 24-hour period). For pollutants with limitations expressed in units of mass, the daily discharge is calculated as the total mass of the pollutant discharged over the day. For pollutants with limitations expressed in other units of measurement, the daily discharge is calculated as the arithmetic mean measurement of the pollutant over the day. | high |
| #D018 | | Median | The middle measurement in a set of data. The median of a set of data is found by first arranging the measurements in order of magnitude (either increasing or decreasing order) If the number of measurements (n) is odd, then: If n is even, then: (i.e., the midpoint between the (n/2 and ((n/2)+1))). | high |
| #D019 | | Method Detection Limit (MDL) | MDL is the minimum concentration of a substance that can be reported with 99 percent confidence that the measured concentration is distinguishable from method blank results, as defined in 40 Code of Federal Regulations (CFR). part 136, Attachment B. | high |
| #D020 | | Minimum Level (ML) | ML is the concentration at which the entire analytical system must give a recognizable signal and acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method specified sample weights, volumes, and processing steps have been followed. | high |
| #D021 | | Mixing Zone | Mixing Zone is a limited volume of receiving water that is allocated for mixing with a wastewater discharge where water quality criteria can be exceeded without causing adverse effects to the overall waterbody. | high |
| #D022 | | Not Detected (ND) | Sample results which are less than the laboratory's MDL. | high |
| #D023 | | Persistent Pollutants | Persistent pollutants are substances for which degradation or decomposition in the environment is nonexistent or very slow. | high |
| #D024 | | Pollutant Minimization Program (PMP) | PMP means waste minimization and pollution prevention actions that include, but are not limited to, product substitution, waste stream recycling, alternative waste management methods, and education of the public and businesses. The goal of the PMP shall be to reduce all potential sources of a priority pollutant(s) through pollutant minimization (control) strategies, including pollution prevention measures as appropriate, to maintain the effluent concentration at or below the water quality-based effluent limitation. Pollution prevention measures may be particularly appropriate for persistent bioaccumulative priority pollutants where there is evidence that beneficial uses are being impacted. The San Diego Water Board may consider cost effectiveness when establishing the requirements of a PMP. The completion and implementation of a Pollution Prevention Plan, if required pursuant to Water Code section 13263.3(d), shall be considered to fulfill the PMP requirements. | high |
| #D025 | | Pollution Prevention | Pollution Prevention means any action that causes a net reduction in the use or generation of a hazardous substance or other pollutant that is discharged into water and includes, but is not limited to, input change, operational improvement, production process change, and product reformulation (as defined in Water Code section 13263.3). Pollution prevention does not include actions that merely shift a pollutant in wastewater from one environmental medium to another environmental medium, unless clear environmental benefits of such an approach are identified to the satisfaction of the California State Water Resources Control Board (State Water Board) or San Diego Water Board. | high |
| #D026 | | Reporting Level (RL) | The RL is the ML (and its associated analytical method) chosen by the Discharger for reporting and compliance determination from the MLs included in this Order, including an additional factor if applicable as discussed herein. The MLs included in this Order correspond to approved analytical methods for reporting a sample result that are selected by the San Diego Water Board either from Appendix 4 of the SIP in accordance with section 2.4.2 of the SIP or established in accordance with section 2.4.3 of the SIP. The ML is based on the proper application of method-based analytical procedures for sample preparation and the absence of any matrix interferences. Other factors may be applied to the ML depending on the specific sample preparation steps employed. For example, the treatment typically applied in cases where there are matrixeffects is to dilute the sample or sample aliquot by a factor of ten. In such cases, this additional factor must be applied to the ML in the computation of the RL. | high |
| #D027 | | Source of Drinking Water | Any water designated as municipal or domestic supply (MUN) in the San Diego Basin Plan. | high |
| #D028 | | Standard Deviation ( σ ) | Standard Deviation is a measure of variability that is calculated as follows: where: x is the observed value; µ is the arithmetic mean of the observed values; and n is the number of samples. | high |
| #D029 | | Statistical Threshold Value (STV) | The STV for the bacteria water quality objectives is a set value that approximates the 90th percentile of the water quality distribution of a bacterial population. For the bacteria water quality objectives, the STV for E-coli is 320 CFU/100 mL. | high |
| #D030 | | Toxicity Reduction Evaluation (TRE) | TRE is a study conducted in a step-wise process designed to identify the causative agents of effluent or ambient toxicity, isolate the sources of toxicity, evaluate the effectiveness of toxicity control options, and then confirm the reduction in toxicity. The first steps of the TRE consist of the collection of data relevant to the toxicity, including additional toxicity testing, and an evaluation of facility operations and maintenance practices, and best management practices. A Toxicity Identification Evaluation (TIE) may be required as part of the TRE, if appropriate. (A TIE is a set of procedures to identify the specific chemical(s) responsible for toxicity. These procedures are performed in three phases (characterization, identification, and confirmation) using aquatic organism toxicity tests.) | high |
| #D031 | | Hardness | Hardness is a measure of divalent cations in the water. In most cases, hardness is predominately a measure of the dissolved calcium (Ca 2+ ) and dissolved magnesium (Mg 2+ ) present. | high |
| #D032 | | Water effect ratio (WER) | A WER represents the correlation between the concentration that is present (measured in water sample) and the concentration that is biologically available and toxic to aquatic life. | high |
| #D033 | | Biologically available | 'Biologically available' refers to the metal being present in its free ionic state as a dissolved metal and able to take part in the biological processes of the aquatic life. | high |
| #D034 | | Wet weather | Wet weather is typically defined in applicable monitoring requirements. It is commonly defined as a storm event with greater than 0.1 inch of rainfall. | high |
| #D035 | | TMDL | The term TMDL, or Loading Capacity, is defined as the maximum amount of a pollutant that a waterbody can receive and still attain water quality objectives and protection of designated beneficial uses. | high |
| #D036 | | Pollution Prevention | Pollution Prevention is defined as practices and processes that reduce or eliminate the generation of pollutants, in contrast to source control, treatment, or disposal. | high |
| #D037 | | enforcement action | An enforcement action is any formal or informal action taken to address an incidence of actual or threatened noncompliance with existing regulations or provisions designed to protect water quality. | high |
| #D038 | | Onsite wastewater treatment system(s) | 'Onsite wastewater treatment system(s)' (OWTS) is any individual or community onsite wastewater treatment, pretreatment and dispersal system including, but not limited to, a conventional, alternative, or experimental sewage dispersal system such a septic tanks having a subsurface discharge. | high |
| #D039 | | Copermittees | Copermittees own or operate MS4s through which urban runoff discharges into waters of the U.S. within the San Diego Region. | high |
| #D040 | | Wet weather days | Wet weather days defined as days with rainfall events of 0.2 inches or greater and the following 72 hours. | high |
| #D041 | | Dry weather days | Dry weather days defined as days with less than 0.2 inch of rainfall observed on each of the previous 3 days. | high |
| #D042 | | Designated Beach Area | Designated Beach Area: those recreation waters that, during the recreation season, are heavily used (based upon a comparison of use within the state) and may have a lifeguard, bathhouse facilities, or public parking for beach access. | high |
| #D043 | | Moderate Full Body Contact Recreation | Moderate Full Body Contact Recreation: those recreation waters that are not designated bathing beach waters but typically, during the recreation season, are used by at least half of the number of people as at typical designated bathing beach waters within the state. | high |
| #D044 | | Lightly Used Full Body Contact Recreation | Lightly Used Full Body Contact Recreation: those recreation waters that are not designated bathing beach waters but typically, during the recreation season, are used by less than half of the number of people as at typical designated bathing beach waters within the state, but are more than infrequently used. | high |
| #D045 | | Infrequently Used Full Body Contact | Infrequently Used Full Body Contact: those recreation waters that are rarely or occasionally used. | high |
| #D046 | | storm water | The federal regulations, 40 CFR 122.26(b)(13), define storm water as storm water runoff, snow melt runoff, and surface runoff and drainage. | high |
| #D047 | | illicit discharge | 40 CFR 122.26(b)(2) defines an illicit discharge as any discharge to a storm water conveyance system that is not composed entirely of storm water except discharges pursuant to a NPDES permit and discharges resulting from fire fighting activities. | high |
| #D048 | | Active/Passive Sediment Treatment | Using mechanical, electrical or chemical means to flocculate or coagulate suspended sediment for removal from runoff from construction sites prior to discharge. | high |
| #D049 | | Anthropogenic Litter | Trash generated from human activities, not including sediment. | high |
| #D050 | | Average Monthly Action Level | The highest allowable average of daily discharges over a calendar month. | high |
| #D051 | | Beneficial Uses | The uses of water necessary for the survival or wellbeing of man, plants, and wildlife. These uses of water serve to promote tangible and intangible economic, social, and environmental goals. 'Beneficial Uses' of the waters of the State that may be protected include, but are not limited to, domestic, municipal, agricultural and industrial supply; power generation; recreation; aesthetic enjoyment; navigation; and preservation and enhancement of fish, wildlife, and other aquatic resources or preserves. Existing beneficial uses are uses that were attained in the surface or ground water on or after November 28, 1975; and potential beneficial uses are uses that would probably develop in future years through the implementation of various control measures. 'Beneficial Uses' are equivalent to 'Designated Uses' under federal law. [California Water Code Section 13050(f)]. | high |
| #D052 | | Best Management Practices (BMPs) | Defined in 40 CFR 122.2 as schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the United States. BMPs also include treatment requirements, operating procedures and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. | high |
| #D053 | | Bioassessment | The use of biological community information to evaluate the biological integrity of a water body and its watershed. With respect to aquatic ecosystems, bioassessment is the collection and analysis of samples of the benthic macroinvertebrate community together with physical/habitat quality measurements associated with the sampling site and the watershed to evaluate the biological condition (i.e. biotic integrity) of a water body. | high |
| #D054 | | Biofiltration | Practices that use vegetation and amended soils to detain and treat runoff from impervious areas. Treatment is through filtration, infiltration, adsorption, ion exchange, and biological uptake of pollutants. | high |
| #D055 | | Biological Integrity | Defined in Karr J.R. and D.R. Dudley. 1981. Ecological perspective on water quality goals. Environmental Management 5:55-68 as: 'A balanced, integrated, adaptive community of organisms having a species composition, diversity, and functional organization comparable to that of natural habitat of the region.' Also referred to as ecosystem health. | high |
| #D056 | | BMP Design Manual | A plan developed to eliminate, reduce, or mitigate the impacts of runoff from development projects, including Priority Development Projects. | high |
| #D057 | | Chronic Toxicity | A measurement of sublethal effect (e.g. reduced growth, reproduction) to experimental test organisms exposed to an effluent or receiving waters compared to that of the control organisms. | high |
| #D058 | | Clean Water Act Section 303(d) Water Body | An impaired water body in which water quality does not meet applicable water quality standards and/or is not expected to meet water quality standards, even after the application of technology based pollution controls required by the CWA. The discharge of runoff to these water bodies by the Copermittees is significant because these discharges can cause or contribute to violations of applicable water quality standards. | high |
| #D059 | | Construction Activities | Actions implemented during construction of development or redevelopment projects during the Preliminary Task (including rough grading and/or disking, clearing and grubbing operations, or any soil disturbance prior to mass grading), Grading or Land Development (including topography and slope reconfiguration, alluvium removals, canyon cleanouts, rock undercuts, keyway excavations, land form grading, and stockpiling of select material for capping operations), Streets and Utility Installation (including excavation and street paving, lot grading, curbs, gutters and sidewalks, public utilities, public water facilities including fire hydrants, public sanitary sewer systems, storm sewer systems and/or other drainage improvements), or Vertical Construction (including the build out of structures from foundations to roofing, including rough landscaping). | high |
| #D060 | | Construction Site | Any project, including projects requiring coverage under the Construction General Permit, that involves soil disturbing activities including, but not limited to, clearing, grading, disturbances to ground such as stockpiling, and excavation. | high |
| #D061 | | Contamination | As defined in the Porter-Cologne Water Quality Control Act, contamination is 'an impairment of the quality of waters of the State by waste to a degree which creates a hazard to the public health through poisoning or through the spread of disease. 'Contamination' includes any equivalent effect resulting from the disposal of waste whether or not waters of the State are affected.' | high |
| #D062 | | Copermittee | A permittee to a NPDES permit that is only responsible for permit conditions relating to the discharge for which it is operator [40 CFR 122.26(b)(1)]. For the purposes of this Order, a Copermittee is one of the individual permittees identified in Tables 1a-1c of this Order. | high |
| #D063 | | Copermittees | All of the individual Copermittees, collectively. | high |
| #D064 | | Critical Channel Flow (Qc) | The channel flow that produces the critical shear stress that initiates bed movement or that erodes the toe of channel banks. When measuring Qc, it should be based on the weakest boundary material - either bed or bank. | high |
| #D065 | | Daily Discharge | Defined as either: (1) the total mass of the constituent discharged over the calendar day or any 24 hour period that reasonably represents a calendar day for purposes of sampling (as specified in the permit), for a constituent with limitations expressed in units of mass or; (2) the unweighted arithmetic mean measurement of the constituent over the day for a constituent with limitations expressed in other units of measurement (e.g. concentration.) | high |
| #D066 | | Development Projects | Construction, rehabilitation, redevelopment, or reconstruction of any public or private projects. | high |
| #D067 | | Dry Season | May 1 to September 30. | high |
| #D068 | | Dry Weather | Weather is considered dry if the preceding 72 hours has been without measurable precipitation (>0.1 inch). | high |
| #D069 | | Enclosed Bays | Enclosed bays are indentations along the coast that enclose an area of oceanic water within distinct headlands or harbor works. Enclosed bays include all bays where the narrowest distance between the headlands or outermost bay works is less than 75 percent of the greatest dimension of the enclosed portion of the bay. Enclosed bays do not include inland surface waters or ocean waters. | high |
| #D070 | | Erosion | When land is diminished or worn away due to wind, water, or glacial ice. Often the eroded debris (silt or sediment) becomes a pollutant via storm water runoff. Erosion occurs naturally but can be intensified by land clearing activities such as farming, development, road building, and timber harvesting. | high |
| #D071 | | Environmentally Sensitive Areas (ESAs) | Areas that include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of Special Biological Significance by the State Water Board and San Diego Water Board; State Water Quality Protected Areas; water bodies designated with the RARE beneficial use by the State Water Board and San Diego Water Board; areas designated as preserves or their equivalent under the Natural Communities Conservation Program within the Cities and County of Orange; and any other equivalent environmentally sensitive areas which have been identified by the Copermittees. | high |
| #D072 | | Estuaries | Waters, including coastal lagoons, located at the mouth of streams that serve as areas of mixing fresh and ocean waters. Coastal lagoons and mouths of streams that are temporarily separated from the ocean by sandbars shall be considered estuaries. Estuarine waters shall be considered to extend from a bay or the open ocean to a point upstream where there is no significant mixing of fresh water and ocean water. Estuaries do not include inland surface waters or ocean waters. | high |
| #D073 | | Existing Development | Any area that has been developed and exists for municipal, commercial, industrial, or residential purposes, uses, or activities. May include areas that are not actively used for its originally developed purpose, but may be re-purposed or redeveloped for another use or activity. | high |
| #D074 | | Flow Duration | The long-term period of time that flows occur above a threshold that causes significant sediment transport and may cause excessive erosion damage to creeks and streams (not a single storm event duration). To maintain pre-development flow duration means that the total number of hours (counts) within each range of flows in a flow-duration histogram cannot increase between the pre- and post-development condition. Flow duration within the range of geomorphologically significant flows is important for managing erosion. | high |
| #D075 | | Grading | The cutting and/or filling of the land surface to a desired slope or elevation. | high |
| #D076 | | Groundwater | Subsurface water that occurs beneath the water table in soils and geologic formations that are fully saturated. | high |
| #D077 | | Hazardous Material | Any substance that poses a threat to human health or the environment due to its toxicity, corrosiveness, ignitability, explosive nature or chemical reactivity. These also include materials named by the USEPA in 40 CFR 116 to be reported if a designated quantity of the material is spilled into the waters of the U.S. or emitted into the environment. | high |
| #D078 | | Hazardous Waste | Hazardous waste is defined as 'any waste which, under Section 600 of Title 22 of this code, is required to be managed according to Chapter 30 of Division 4.5 of Title 22 of this code' [CCR Title 22, Division 4.5, Chapter 11, Article 1]. | high |
| #D079 | | Household Hazardous Waste | Paints, cleaning products, and other hazardous wastes generated during home improvement or maintenance activities. | high |
| #D080 | | Hydromodification | The change in the natural watershed hydrologic processes and runoff characteristics (i.e., interception, infiltration, overland flow, and groundwater flow) caused by urbanization or other land use changes that result in increased stream flows and sediment transport. In addition, alteration of stream and river channels, such as stream channelization, concrete lining, installation of dams and water impoundments, and excessive streambank and shoreline erosion are also considered hydromodification, due to their disruption of natural watershed hydrologic processes. | high |
| #D081 | | Illicit Connection | Any man-made conveyance or drainage system through which a non-storm water discharge to the storm water drainage system occurs or may occur. Any connection to the MS4 that conveys an illicit discharge. | high |
| #D082 | | Illicit Discharge | Any discharge to the MS4 that is not composed entirely of storm water except discharges pursuant to a NPDES permit and discharges resulting from firefighting activities [40 CFR 122.26(b)(2)]. | high |
| #D083 | | Inactive Areas | Areas of construction activity that are not active and those that have been active and are not scheduled to be re-disturbed for at least 14 days. | high |
| #D084 | | Infiltration | In the context of low impact development, infiltration is defined as the percolation of water into the ground. Infiltration is often expressed as a rate (inches per hour), which is determined through an infiltration test. In the context of non-storm water, infiltration is water other than wastewater that enters a sewer system (including sewer service connections and foundation drains) from the ground through such means as defective pipes, pipe joints, connections, or manholes. Infiltration does not include, and is distinguished from, inflow [40 CFR 35.2005(20)]. | high |
| #D085 | | Inland Surface Waters | Includes all surface waters of the State that do not include the ocean, enclosed bays, or estuaries. | high |
| #D086 | | Jurisdictional Runoff Management Program Document | A written description of the specific jurisdictional runoff management measures and programs that each Copermittee will implement to comply with this Order and ensure that storm water pollutant discharges in runoff are reduced to the MEP and do not cause or contribute to a violation of water quality standards. | high |
| #D087 | | Low Impact Development (LID) | A storm water management and land development strategy that emphasizes conservation and the use of on-site natural features integrated with engineered, small-scale hydrologic controls to more closely reflect pre-development hydrologic functions. | high |
| #D088 | | Low Impact Development Best Management Practices (LID BMPs) | LID BMPs include schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the United States through storm water management and land development strategies that emphasize conservation and the use of on-site natural features integrated with engineered, small-scale hydrologic controls to more closely reflect pre-development hydrologic functions. LID BMPs include retention practices that do not allow runoff, such as infiltration, rain water harvesting and reuse, and evapotranspiration. LID BMPs also include flow-through practices such as biofiltration that may have some discharge of storm water following pollutant reduction. | high |
| #D089 | | Major Outfall | As defined in the Code of Federal Regulations, a major outfall is a MS4 outfall that discharges from a single pipe with an inside diameter of 36 inches or more or its equivalent (i.e. discharge from a single conveyance other than a circular pipe which is associated with a drainage area of more than 50 acres); or, for MS4s that receive storm water from lands zoned for industrial activity (based on comprehensive zoning plans or equivalent), a MS4 outfall that discharges from a single pipe with an inside diameter of 12 inches or more or from its equivalent (i.e. discharge from other than a circular pipe associated with a drainage area of 2 acres or more). | high |
| #D090 | | Maximum Daily Action Level (MDAL) | The highest allowable daily discharge of a pollutant, over a calendar day (or 24 hour period). For pollutants with action levels expressed in units of mass, the daily discharge is calculated as the total mass of the pollutant discharged over the day. For pollutants with action levels expressed in other units of measurement, the daily discharge is calculated as the arithmetic mean measurement of the pollutant over the day. | high |
| #D091 | | Maximum Extent Practicable (MEP) | The technology-based standard established by Congress in CWA section 402(p)(3)(B)(iii) for storm water that operators of MS4s must meet. Technology-based standards establish the level of pollutant reductions that dischargers must achieve, typically by treatment or by a combination of source control and treatment control BMPs. MEP generally emphasizes pollution prevention and source control BMPs primarily (as the first line of defense) in combination with treatment methods serving as a backup (additional line of defense). MEP considers economics and is generally, but not necessarily, less stringent than BAT. | high |
| #D092 | | Monitoring Year | October 1 to September 30 | high |
| #D093 | | Municipal Separate Storm Sewer System (MS4) | A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): (i) Owned or operated by a State, city, town, borough, county, parish, district, association, or other public body (created by or pursuant to State law) having jurisdiction over disposal of sewage, industrial wastes, storm water, or other wastes, including special districts under State law such as a sewer district, flood control district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or designated and approved management agency under section 208 of the CWA that discharges to waters of the United States; (ii) Designated or used for collecting or conveying storm water; (iii) Which is not a combined sewer; (iv) Which is not part of the Publicly Owned Treatment Works (POTW) as defined at 40 CFR 122.26. | high |
| #D094 | | National Pollutant Discharge Elimination System (NPDES) | The national program for issuing, modifying, revoking and reissuing, terminating, monitoring and enforcing permits, and imposing and enforcing pretreatment requirements, under Sections 307, 318, 402, and 405 of the CWA. | high |
| #D095 | | AMAL | Average Monthly Action Level | high |
| #D096 | | ASBS | Area(s) of Special Biological Significance | high |
| #D097 | | NAL | Non-Storm Water Action Level | high |
| #D098 | | SAL | Storm Water Action Level | high |
| #D099 | | WQBEL | Water Quality Based Effluent Limitation | high |
| #D100 | | Non-Storm Water | All discharges to and from a MS4 that do not originate from precipitation events (i.e., all discharges from a MS4 other than storm water). Non-storm water includes illicit discharges and NPDES permitted discharges. | high |
| #D101 | | Nuisance | As defined in the Porter-Cologne Water Quality Control Act, a nuisance is 'anything which meets all of the following requirements: 1) Is injurious to health, or is indecent, or offensive to the senses, or an obstruction to the free use of property, so as to interfere with the comfortable enjoyment of life or property. 2) Affects at the same time an entire community or neighborhood, or any considerable number of persons, although the extent of the annoyance or damage inflicted upon individuals may be unequal. 3) Occurs during, or as a result of, the treatment or disposal of wastes.' | high |
| #D102 | | Order | Unless otherwise specified, refers to this Order, Order No. R9-2013-0001 (NPDES No. CAS0109266) | high |
| #D103 | | Persistent Flow | Persistent flow is defined as the presence of flowing, pooled, or ponded water more than 72 hours after a measureable rainfall event of 0.1 inch or greater during three consecutive monitoring and/or inspection events. All other flowing, pooled, or ponded water is considered transient. | high |
| #D104 | | Pollution Prevention | Pollution prevention is defined as practices and processes that reduce or eliminate the generation of pollutants, in contrast to source control BMPs, treatment control BMPs, or disposal. | high |
| #D105 | | Pre-Development Runoff Conditions | Approximate flow rates and durations that exist or existed onsite before land development occurs. For new development projects, this equates to runoff conditions immediately before project construction. For redevelopment projects, this equates to runoff conditions from the project footprint assuming infiltration characteristics of the underlying soil, and existing grade. Runoff coefficients of concrete or asphalt must not be used. A redevelopment Priority Development Project must use available information pertaining to existing underlying soil type and onsite existing grade to estimate pre-development runoff conditions. | high |
| #D106 | | Rainy Season (aka Wet Season) | October 1 to April 30 | high |
| #D107 | | Receiving Waters | Waters of the United States. | high |
| #D108 | | Runoff | All flows in a storm water conveyance system that consists of the following components: (1) storm water (wet weather flows) and (2) non-storm water including dry weather flows. | high |
| #D109 | | Storm Water | Per 40 CFR 122.26(b)(13), means storm water runoff, snowmelt runoff and surface runoff and drainage. Surface runoff and drainage pertains to runoff and drainage resulting from precipitation events. | high |
| #D110 | | Waters of the State | Any water, surface or underground, including saline waters within the boundaries of the State [CWC section 13050 (e)]. The definition of the Waters of the State is broader than that for the Waters of the United States in that all water in the State is considered to be a Waters of the State regardless of circumstances or condition. | high |
| #D111 | | Waters of the United States | As defined in the 40 CFR 122.2, the Waters of the U.S. are defined as: '(a) All waters, which are currently used, were used in the past, or may be susceptible to use in interstate or foreign commerce, including all waters which are subject to the ebb and flow of the tide; (b) All interstate waters, including interstate 'wetlands;' (c) All other waters such as intrastate lakes, rivers, streams (including intermittent streams), mudflats, sandflats, 'wetlands,' sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds the use, degradation or destruction of which would affect or could affect interstate or foreign commerce including any such waters: (1) Which are or could be used by interstate or foreign travelers for recreational or other purposes; (2) From which fish or shellfish are or could be taken and sold in interstate or foreign commerce; or (3) Which are used or could be used for industrial purposes by industries in interstate commerce; (d) All impoundments of waters otherwise defined as waters of the United States under this definition: (e) Tributaries of waters identified in paragraphs (a) through (d) of this definition; (f) The territorial seas; and (g) 'Wetlands' adjacent to waters (other than waters that are themselves wetlands) identified in paragraphs (a) through (f) of this definition. Waters of the United States do not include prior converted cropland.' | high |
| #D112 | | Wet Weather | Weather is considered wet up to 72 hours after a storm event of 0.1 inches and greater, unless otherwise defined by another regulatory mechanism (e.g. a TMDL). | high |
| #D113 | | At the point of discharge(s) | Means in the surf zone immediately where runoff from an outfall meets the ocean water (a.k.a., at point zero). | high |
| #D114 | | Design storm | For purposes of these Special Protections, a design storm is defined as the volume of runoff produced from one inch of precipitation per day or, if this definition is inconsistent with the discharger's applicable storm water permit, then the design storm shall be the definition included in the discharger's applicable storm water permit. | high |
| #D115 | | Natural Ocean Water Quality | The water quality (based on selected physical, chemical and biological characteristics) that is required to sustain marine ecosystems, and which is without apparent human influence, i.e. , an absence of significant amounts of: (a) man-made constituents ( e.g., DDT); (b) other chemical ( e.g., trace metals), physical (temperature/thermal pollution, sediment burial), and biological ( e.g. , bacteria) constituents at concentrations that have been elevated due to man's activities above those resulting from the naturally occurring processes that affect the area in question; and (c) non-indigenous biota ( e.g., invasive algal bloom species) that have been introduced either deliberately or accidentally by man. | high |
| #D116 | | Acute Toxicity | A measurement of the adverse effect (usually mortality) of a waste discharge or ambient water sample on a group of test organisms during a short-term exposure. | high |
| #D117 | | Agricultural Operation | Any agricultural business or trade activity, including farms, nurseries, and orchards, that produces crops with the intent to make a profit. The San Diego Water Board presumes an intent to make a profit if at least one of the following criteria is met: 1. The owner or operator files a federal Department of Treasury Internal Revenue Service Form 1040 Schedule F Profit or Loss from Farming with their federal taxes. 2. The owner or operator receives agriculture water use rates or has been given an agricultural water use variance from their water purveyor. 3. The owner or operator of the Agricultural Operation is required to obtain an Operator Identification Number/Permit Number from a local County Agricultural Commissioner for pesticide use reporting. | high |
| #D118 | | Areas of Special Biological Significance (ASBS) | Those areas designated by the State Water Resources Control Board (State Water Board) as ocean areas requiring protection of species or biological communities to the extent that alteration of natural water quality is undesirable. All Areas of Special Biological Significance are also classified as a subset of STATE WATER QUALITY PROTECTION AREAS. | high |
| #D119 | | Average Monthly Effluent Limitation (AMEL) | The highest allowable average of daily discharges over a calendar month, calculated as the sum of all daily discharges measured during a calendar month divided by the number of daily discharges measured during that month. | high |
| #D120 | | Average Weekly Effluent Limitation (AWEL) | The highest allowable average of daily discharges over a calendar week (Sunday through Saturday), calculated as the sum of all daily discharges measured during a calendar week divided by the number of daily discharges measured during that week. | high |
| #D121 | | Chlordane | Shall mean the sum of chlordane-alpha, chlordane-gamma, chlordene-alpha, chlordene-gamma, nonachlor-alpha, nonachlor-gamma, and oxychlordane. | high |
| #D122 | | Chronic Toxicity Tests | A measurement of the sub-lethal effects of a discharge or ambient water sample (e.g. reduced growth or reproduction). Certain chronic toxicity tests include an additional measurement of lethality. | high |
| #D123 | | Clean Water Act (CWA) | The Federal Water Pollution Control Act enacted by Public Law 92-500 as amended by Public Laws 95217,95-576,96-483, and 97-117; 33 USC 1251 et seq. | high |
| #D124 | | Compost | Compost" means the product resulting from the controlled biological decomposition of organic wastes that are source separated from the municipal solid waste stream, or which are separated at a centralized facility. "Compost" includes vegetable, yard, and wood wastes which are not hazardous waste. | high |
| #D125 | | Daily Discharge | Daily Discharge is defined as either: (1) the total mass of the constituent discharged over the calendar day (12:00 am through 11:59 pm) or any 24-hour period that reasonably represents a calendar day for purposes of sampling (as specified in the permit), for a constituent with limitations expressed in units of mass or; (2) the unweighted arithmetic mean measurement of the constituent over the day for a constituent with limitations expressed in other units of measurement (e.g., concentration). | high |
| #D126 | | DDT | Shall mean the sum of 4,4'DDT, 2,4'DDT, 4,4'DDE, 2,4'DDE, 4,4'DDD, and 2,4'DDD. | high |
| #D127 | | Degradation | Any measurable adverse change in water quality. | high |
| #D128 | | Detected, but Not Quantified (DNQ) | Sample results that are less than the reported Minimum Level, but greater than or equal to the laboratory's MDL. Sample results reported as DNQ are estimated concentrations. | high |
| #D129 | | Dichlorobenzenes | Shall mean the sum of 1,2- and 1,3-dichlorobenzene. | high |
| #D130 | | Discharger | Any owner or operator of an Agricultural Operation that discharges, or threatens to discharge, wastes associated with agricultural activities into waters of the State in the San Diego Region. | high |
| #D131 | | Dredged Material | Any material excavated or dredged from the navigable waters of the United States, including material otherwise referred to as 'spoil.' | high |
| #D132 | | Enclosed Bays | Indentations along the coast that enclose an area of oceanic water within distinct headlands or harbor works. Enclosed bays include all bays where the narrowest distance between headlands or outermost harbor works is less than 75 percent of the greatest dimension of the enclosed portion of the bay. This definition includes but is not limited to: Humboldt Bay, Bodega Harbor, Tomales Bay, Drakes Estero, San Francisco Bay, Morro Bay, Los Angeles Harbor, Upper and Lower Newport Bay, Mission Bay, and San Diego Bay. | high |
| #D133 | | Endosulfan | The sum of endosulfan-alpha and -beta and endosulfan sulfate. | high |
| #D134 | | Estuaries and Coastal Lagoons | Estuaries and Coastal Lagoons are waters at the mouths of streams that serve as mixing zones for fresh and ocean waters during a major portion of the year. Mouths of streams that are temporarily separated from the ocean by sandbars shall be considered as estuaries. | high |
| #D135 | | Groundwater | Water in the ground that is in the zone of saturation. The upper surface of the saturate zone is called the water table. | high |
| #D136 | | Halomethanes | Halomethanes shall mean the sum of bromoform, bromomethane (methyl bromide) and chloromethane (methyl chloride). | high |
| #D137 | | Hexachlorocyclohexane (HCH) | HCH shall mean the sum of the alpha, beta, gamma (lindane) and delta isomers of hexachlorocyclohexane. | high |
| #D138 | | Impaired Water Body | A surface water body that is not attaining water quality standards and is identified on the State Water Board's Clean Water Act section 303(d) list. | high |
| #D139 | | Initial Dilution | The process that results in the rapid and irreversible turbulent mixing of wastewater with ocean water around the point of discharge. | high |
| #D140 | | Inland Surface Waters | The surface waters of the State that do not include the ocean, enclosed bays, or estuaries. | high |
| #D141 | | Instantaneous Maximum Effluent Limitation | The highest allowable value for any single grab sample or aliquot (i.e., each grab sample or aliquot is independently compared to the instantaneous maximum limitation). | high |
| #D142 | | Instantaneous Minimum Effluent Limitation | The lowest allowable value for any single grab sample or aliquot (i.e., each grab sample or aliquot is independently compared to the instantaneous minimum limitation). | high |
| #D143 | | Irrigated Lands | Land irrigated to produce crops or agricultural products for commercial purposes. Irrigated lands do not include lands used solely for grazing. | high |
| #D144 | | Irrigation Return Flow or Runoff | Surface and subsurface water which leaves the field following application of irrigation water | high |
| #D145 | | Kelp Beds | For purposes of the bacteriological standards of the Ocean Plan, are significant aggregations of marine algae of the genera Macrocystis and Nereocystis. Kelp beds include the total foliage canopy of Macrocystis and Nereocystis plants throughout the water column. | high |
| #D146 | | Management Practices | A practice or combination of practices that is the most effective and practicable (including technological, economic, and institutional considerations) means of controlling nonpoint pollutant sources at levels protective of water quality. | high |
| #D147 | | Mariculture | The culture of plants and animals in marine waters independent of any pollution source. | high |
| #D148 | | Material | (a) In common usage: (1) the substance or substances of which a thing is made or composed (2) substantial; (b) For purposes of the Ocean Plan relating to waste disposal, dredging and the disposal of dredged material and fill, MATERIAL means matter of any kind or description which is subject to regulation as waste, or any material dredged from the navigable waters of the United States. | high |
| #D149 | | Maximum Daily Effluent Limitation (MDEL) | The highest allowable daily discharge of a pollutant. | high |
| #D150 | | Member | A Discharger who belongs to a Third-Party Group. | high |
| #D151 | | Method Detection Limit (MDL) | The minimum concentration of a substance that can be measured and reported with 99 percent confidence that the analyte concentration is greater than zero, as defined in 40 C.F.R. part 136, Attachment B. | high |
| #D152 | | Minimum Level (ML) | The concentration at which the entire analytical system must give a recognizable signal and acceptable calibration point. The ML is the concentration in a sample that is equivalent to the concentration of the lowest calibration standard analyzed by a specific analytical procedure, assuming that all the method specified sample weights, volumes, and processing steps have been followed. | high |
| #D153 | | Monitoring | Monitoring undertaken in connection with assessing water quality conditions, and factors that may affect water quality conditions. Monitoring includes, but is not limited to, water quality monitoring undertaken in connection with agricultural activities, monitoring to identify short and long-term trends in water quality, nutrient monitoring, active inspections of operations, and management practice implementation and effectiveness monitoring. | high |
| #D154 | | Natural Light | Reduction of natural light may be determined by the San Diego Water Board by measurement of light transmissivity or total irradiance, or both, according to the monitoring needs of the San Diego Water Board. | high |
| #D155 | | Non-Irrigated Agriculture | Land that employs dryland farming techniques to produce crops or agricultural products for commercial purposes. Non-irrigated lands do not include lands used solely for grazing. | high |
| #D156 | | Non-Storm Water Discharge | Any discharge that is not composed entirely of storm water. | high |
| #D157 | | Nuisance | "Nuisance" means anything which meets all of the following requirements: (1) Is injurious to health, or is indecent or offensive to the senses, or an obstruction to the free use of property, so as to interfere with the comfortable enjoyment of life or property. (2) Affects at the same time an entire community or neighborhood, or any considerable number of persons, although the extent of the annoyance or damage inflicted upon individuals may be unequal. (3) Occurs during, or as a result of, the treatment or disposal of waste. [Water Code section 13050(m)] | high |
| #D158 | | Nutrient | Any element taken in by an organism which is essential to its growth and which is used by the organism in elaboration of its food and tissue. | high |
| #D159 | | Not Detected (ND) | Sample results less than the laboratory's MDL. | high |
| #D160 | | Ocean Waters | The territorial marine waters of the state as defined by California law to the extent these waters are outside of enclosed bays, estuaries, and coastal lagoons. | high |
| #D161 | | Off-Property Discharge | The discharge or release of waste beyond the boundaries of the agricultural operation or to water bodies that run through the agricultural operation. | high |
| #D162 | | Perched groundwater | Groundwater separated from an underlying body of groundwater by an unsaturated zone . | high |
| #D163 | | PAHs (polynuclear aromatic hydrocarbons) | The sum of acenaphthylene, anthracene, 1,2-benzanthracene, 3,4-benzofluoranthene, benzo[k]fluoranthene, 1,12-benzoperylene, benzo[a]pyrene, chrysene, dibenzo[ah]anthracene, fluorene, indeno[1,2,3-cd]pyrene, phenanthrene and pyrene. | high |
| #D164 | | PCBs (polychlorinated biphenyls) | The sum of chlorinated biphenyls whose analytical characteristics resemble those of Aroclor-1016, Aroclor-1221, Aroclor-1232, Aroclor-1242, Aroclor-1248, Aroclor-1254 and Aroclor-1260. | high |
| #D165 | | Pollutant | "Pollutant" means dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt and industrial, municipal, and agricultural waste discharged into water. | high |
| #D166 | | Pollutant Minimization Program (PMP) | PMP means waste minimization and pollution prevention actions that include, but are not limited to, product substitution, waste stream recycling, alternative waste management methods, and education of the public and businesses. | high |
| #D167 | | Pollution | Pollution" means an alteration of the quality of the waters of the state by waste to a degree which unreasonably affects either of the following: (A) The waters for beneficial uses. (B) Facilities which serve these beneficial uses. "Pollution" may include "contamination." [Water Code section 13050(l)]. | high |
| #D168 | | Receiving Waters | Surface water or groundwater that receives or has the potential to receive discharges of waste from agricultural operations. | high |
| #D169 | | Reported Minimum Level | The reported ML (also known as the Reporting Level or RL) is the ML (and its associated analytical method) chosen by the Discharger for reporting and compliance determination from the MLs included in this Order, including an additional factor if applicable as discussed herein. | high |
| #D170 | | Requirements of Applicable Water Quality Control Plans | Water quality objectives, prohibitions, total maximum daily load implementation plans, or other requirements contained in water quality control plans adopted by the San Diego Water Board or the State Water Board and approved according to applicable law. | high |
| #D171 | | San Diego Water Board | As used in the General Order the term "San Diego Water Board" is synonymous with the term "Regional Board" as defined in Water Code section 13050(b) and is intended to refer to the California Regional Water Quality Control Board for the San Diego Region as specified in Water Code Section 13200. | high |
| #D172 | | Shellfish | Organisms identified by the California Department of Health Services as shellfish for public health purposes (i.e., mussels, clams and oysters). | high |
| #D173 | | Significant Difference | Defined as a statistically significant difference in the means of two distributions of sampling results at the 95 percent confidence level. | high |
| #D174 | | Six-Month Median Effluent Limitation | The highest allowable moving median of all daily discharges for any 180-day period. | high |
| #D175 | | State Water Quality Protection Areas (SWQPAs) | Non-terrestrial marine or estuarine areas designated to protect marine species or biological communities from an undesirable alteration in natural water quality. | high |
| #D176 | | Storm Water | Includes storm water runoff, snowmelt runoff, and storm water surface runoff and drainage. It excludes infiltration and runoff from agricultural land. | high |
| #D177 | | TCDD Equivalents | The sum of the concentrations of chlorinated dibenzodioxins (2,3,7,8-CDDs) and chlorinated dibenzofurans (2,3,7,8-CDFs) multiplied by their respective toxicity factors. | high |
| #D178 | | Third-Party Group | An organization approved by the San Diego Water Board to represent and assist Dischargers in carrying out the terms and conditions of this General Order. | high |
| #D179 | | Total Maximum Daily Load (TMDL) | From the Code of Federal Regulations (CFR), 40 CFR 130.2(i), a TMDL is: 'The sum of the individual WLAs [wasteload allocations] for point sources and LAs [load allocations] for nonpoint sources and natural background. … TMDLs can be expressed in terms of either mass per time, toxicity, or other appropriate measure. …'. | high |
| #D180 | | Toxicity | Refers to the toxic effect to aquatic organisms from waste contained in an ambient water quality sample. | high |
| #D181 | | Toxicity Reduction Evaluation (TRE) | A study conducted in a step-wise process designed to identify the causative agents of effluent or ambient toxicity, isolate the sources of toxicity, evaluate the effectiveness of toxicity control options, and then confirm the reduction in toxicity. | high |
| #D182 | | Waste | Includes sewage and any and all other waste substances, liquid, solid, gaseous, or radioactive, associated with human habitation, or of human or animal origin, or from any producing, manufacturing, or processing operation, including waste placed within containers of whatever nature prior to, and for purposes of, disposal as defined in Water Code section 13050(d). | high |
| #D183 | | Waste Discharges from Agricultural Operations | The discharge or release of waste to surface water or groundwater. Waste discharges to surface water include, but are not limited to, irrigation return flows, tailwater, drainage water, subsurface (tile) drains, storm water runoff flowing from irrigated lands, aerial drift, and overspraying of pesticides. | high |
| #D184 | | Water Quality Benchmark | Discharge prohibitions and narrative or numeric water quality objectives, a water quality objective established by an applicable Statewide plan or policy, criteria established by USEPA (including those in the California Toxics Rule and the applicable portions of the National Toxics Rule), and load allocations established pursuant to a total maximum daily load (TMDL) (whether established in the Basin Plan or other lawful means). | high |
| #D185 | | Water Quality Criteria | Levels of water quality required under section 303(c) of the Clean Water Act that are expected to render a body of water suitable for its designated uses. | high |
| #D186 | | Water Quality Objectives | Defined in Water Code section 13050 as 'limits or levels of water quality constituents or characteristics which are established for the reasonable protection of beneficial uses of water or the prevention of nuisance within a specified area.' | high |
| #D187 | | Water Quality Problem | Exceedance of an applicable water quality standard or a trend of degradation that may threaten applicable Basin Plan beneficial uses. | high |
| #D188 | | Water Quality Standards | Provision of state or federal law that consist of the designated beneficial uses of a waterbody, the numeric and narrative water quality criteria that are necessary to protect the uses of that particular waterbody, and an antidegradation statement. | high |
| #D189 | | Water Recycling | The treatment of wastewater to render it suitable for reuse, the transportation of treated wastewater to the place of use, and the actual use of treated wastewater for a direct beneficial use or controlled use that would not otherwise occur. | high |
| #D190 | | Waters of the State | Any surface water or groundwater, including saline waters, within the boundaries of the State. [Water Code section 13050(e)] | high |
| #D191 | | Existing Discharger | An Existing Discharger is any owner or operator who discharges, or proposes to discharge, waste from an Agricultural Operation that was in existence on the adoption date of this General Order. | high |
| #D192 | | New Discharger | A New Discharger is any Owner or Operator who proposes a new discharge of waste from an Agricultural Operation that was not existence on the adoption date of this General Order. | high |
| #D193 | | wadeable reach | A wadeable reach is defined as that which is less than one meter deep for at least 50% of its length. | high |
| #D194 | | Core monitoring | Core monitoring consists of the basic site-specific monitoring necessary to measure compliance with the requirements of this General Order and impacts to receiving water quality from the Members' Agricultural Operations. Core monitoring is typically conducted in the immediate vicinity of discharges representative of all Members by examining local scale spatial effects of discharges that are similar in size, crop type, and location of the Members' Agricultural Operations. | high |
| #D195 | | Regional monitoring | Regional monitoring provides information necessary to make assessments over large areas and serves to evaluate cumulative effects of all anthropogenic inputs, including commercial agriculture, on the ecological health of water bodies in the San Diego Region. This MRP relies on biological assessment techniques to evaluate the biological condition of waterbodies receiving waste discharges from agricultural operations from a regional perspective. | high |
| #D196 | | Special studies | Special studies are directed monitoring efforts designed in response to specific management or research questions identified through either core or regional monitoring programs. Oftentimes, special studies are used to help understand core or regional monitoring results where a specific environmental process is not well understood, or to address unique issues of local importance. | high |
| #D197 | | Bioassessment | Biological assessment, or 'bioassessment,' is a way to measure ecosystem health based on the living organisms at a given location. To achieve this, scientists examine communities of organisms such as invertebrates (e.g., insects, crustaceans), fish, algae, and plants to quantify their numbers and species. | high |
| #D198 | | activity not engaged in for profit | Section 183(c) of the Internal Revenue Code defines an 'activity not engaged in for profit' as any activity other than one for which deductions are allowable under Section 162 (trade or business expenses) or Section 212(1) or (2) (expenses for production of income) of the Internal Revenue Code. | high |
| #D199 | | 303(d) List | CWA section 303(d) List of Water Quality Limited Segments | high |
| #D200 | | Basin Plan | Water Quality Control Plan for the San Diego Basin | high |
| #D201 | | MCL | maximum contaminate level | high |