| #D001 | | Groundwater Extraction Discharge | The discharge of groundwater removed from the ground or drainage collection systems to lower groundwater levels or pressures, control or eliminate groundwater seepage or leakage, stabilize slopes and other earth structures, or form part of a system to remediate groundwater contamination. Groundwater extraction discharges are associated with groundwater control systems employed in construction and foundation dewatering projects, trench and ditch dewatering projects, monitoring wells, tank removal projects, groundwater remediation projects, permanent groundwater drainage and seepage control projects, and other similar activities. The term as used in this Order does not include permanent groundwater extraction discharges to San Diego Bay or reaches of its tributaries under tidal influence with the exception of the discharge to San Diego Bay from the permanent groundwater drainage control system at One America Plaza in the City of San Diego. | high |
| #D002 | | Discharger | Any person that is authorized to discharge extracted groundwater under this Order through an NOA issued by the San Diego Water Board. | high |
| #D003 | | Waters of the United States | Generally refers to surface waters, as defined for the purposes of the federal Clean Water Act. For the purpose of this Order, the terms 'surface water', and 'receiving water' are interchangeably used to mean 'waters of the United States,' unless noted otherwise. | high |
| #D004 | | Permanent groundwater extraction discharges | Refers to long-term discharges from groundwater control systems for completed structures needed to lower groundwater levels, reduce hydrostatic pressure, or control infiltration and leakage of groundwater into below ground completed structures. | high |
| #D005 | | 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 |
| #D006 | | 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 |
| #D007 | | Chronic Toxicity | This parameter shall be used to measure the acceptability of waters for supporting a healthy biota until improved methods are developed to evaluate biological response. | high |
| #D008 | | Contamination | 'Contamination' means an impairment of the quality of the 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. [CWC section 13050(k)] | high |
| #D009 | | 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 |
| #D010 | | Detected, but Not Quantified (DNQ) | DNQ are those sample results less than the RL, but greater than or equal to the laboratory's MDL. Sample results reported as DNQ are estimated concentrations. | high |
| #D011 | | 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 waste load allocation (WLA) as used in U.S. EPA guidance (Technical Support Document For Water Quality-based Toxics Control, March 1991, second printing, EPA/505/2-90-001). | high |
| #D012 | | 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 harbor works is less than 75 percent of the greatest dimension of the enclosed portion of the bay. Enclosed bays of the San Diego Region include, but are not limited to, Mission Bay, and San Diego Bay. Enclosed bays do not include inland surface waters or ocean waters. | 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. | high |
| #D014 | | Extraction | Extraction is the act of forcibly withdrawing groundwater from the sub surface. Extraction through mechanical means is termed 'active' extraction, such as when using pumps to extract groundwater. Alternatively, 'passive' extraction is through the use of gravity, such as with a french drain or weep hole. | high |
| #D015 | | Groundwater | Groundwater means any water, except capillary moisture, located beneath the land surface in soil pore spaces and in the fractures of rock formations or beneath the bed of any river, stream, lake, reservoir, or other body of surface water, whatever the subsurface geologic structure in which such water stands, flows, percolates or otherwise occurs. | high |
| #D016 | | Hardness | A characteristic of water caused mainly by the salts of calcium and magnesium, such as bicarbonate, carbonate, sulfate, chloride and nitrate. Hardness or total hardness is generally defined as the sum of the calcium and magnesium concentrations expressed in milligrams per liter of equivalent calcium carbonate. | high |
| #D017 | | Inland Surface Waters | All surface waters of the San Diego Region exclusive of the waters of the Pacific Ocean, enclosed bays and estuaries, coastal lagoons, and groundwaters. Inland Surface Waters includes reservoirs and lakes. | high |
| #D018 | | 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 |
| #D019 | | 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 |
| #D020 | | 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 |
| #D021 | | 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 the median = X(n+1)/2. If n is even, then the median = (Xn/2 + X(n/2)+1 )/2 (i.e., the midpoint between the n/2 and n/2+1). | high |
| #D022 | | Method Detection Limit (MDL) | MDL is 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 in 40 CFR part 136, Attachment B, revised as of July 3, 1999. | high |
| #D023 | | 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 |
| #D024 | | MS4 Operator | The municipal separate storm sewer system (MS4) operator is the entity responsible for the operation of its local MS4 subject to an MS4 NPDES Permit. | high |
| #D025 | | Not Detected (ND) | Sample results which are less than the laboratory's MDL. | high |
| #D026 | | 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 |
| #D027 | | 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. Discharges to ocean waters are regulated in accordance with the State Water Board's California Ocean Plan | high |
| #D028 | | Pollutants | Substances defined in Clean Water Act section 502(6) (33 U.S.C. section 1362(6)), and incorporated by reference into CWC section 13373. | high |
| #D029 | | 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 |
| #D030 | | 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. | high |
| #D031 | | Test of Significant Toxicity (TST) | A statistical approach used to analyze toxicity test data. The TST incorporates a restated null hypothesis, Welch's t-test, and biological effect thresholds for chronic and acute toxicity. | high |
| #D032 | | 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. | high |
| #D033 | | Water Quality Standards | Water quality standards, as defined in CWA Section 303(c) and 40 CFR section 131.6, consist of 1) the beneficial uses of a water body, 2) criteria (referred to as water quality objectives in California law) to protect those uses, and 3) an anti-degradation policy. | high |
| #D034 | | Bypass | The intentional diversion of waste streams from any portion of a treatment facility. (40 CFR section 122.41(m)(1)(i).) | high |
| #D035 | | Severe property damage | Means substantial physical damage to property, damage to the treatment facilities, which causes them to become inoperable, or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. (40 CFR section 122.41(m)(1)(ii).) | high |
| #D036 | | Upset | Upset means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the Discharger. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation. (40 CFR section 122.41(n)(1).) | high |
| #D037 | | the Regulations | Wastewater Systems Effluent Regulations, under the Fisheries Act, which address the largest point source of pollution in Canadian waters and authorize the release of wastewater effluent under strict conditions. | high |
| #D038 | | Quarterly reporters | Owners or operators of wastewater systems that report four times a year. | high |
| #D039 | | Annual reporters | Wastewater systems that report once a year. | high |
| #D040 | | Transitional authorizations | Extensions to allow facilities to upgrade their systems. | high |
| #D041 | | Temporary bypass authorizations | Authorizations to exceed the standards of the regulations for maintenance and construction activities. | high |
| #D042 | | Temporary authorization to deposit un-ionized ammonia | For systems complying with the effluent quality standards but have issues with ammonia. | high |
| #D043 | | ERRIS | Effluent Regulatory Reporting Information System | high |