| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | operational | operational | recommended | Recycled Water Encouragement | aquatic life | To conserve the State's scarce water resources, the State Water Board encourages the use of recycled water for cooling water in lieu of marine, estuarine or fresh water. | high | |
| #Q002 | administrative | operational | mandatory | Compliance Alternative Selection | aquatic life | An owner or operator of an existing power plant * must comply with either Track 1 or Track 2, below. | high | |
| #Q003 | treatment | operational | mandatory | Track 1 Flow Reduction | aquatic life | An owner or operator of an existing power plant * must reduce intake flow rate* at each unit, at a minimum, to a level commensurate with that which can be attained by a closed-cycle wet cooling system *. | Track 1 compliance alternative selected | high |
| #Q004 | treatment | operational | mandatory | Track 2 Mortality and Entrainment Reduction | aquatic life | If an owner or operator of an existing power plant * demonstrates to the State Water Board's satisfaction that compliance with Track 1 is not feasible *, the owner or operator of an existing power plant * must reduce impingement mortality and entrainment of marine life for the facility, on a unit- by-unit basis, to a comparable level to that which would be achieved under Track 1, using operational or structural controls, or both. | Compliance with Track 1 is demonstrated to be not feasible | high |
| #Q005 | administrative | reporting | guidance | Prior Improvements Credit for Track 2 | aquatic life | Technology-based improvements that are specifically designed to reduce impingement mortality and/or entrainment and were implemented prior to October 1, 2010 may be counted towards meeting Track 2 requirements. | Track 2 selected | high |
| #Q006 | administrative | reporting | guidance | Combined-Cycle Units Credit | aquatic life | The owner or operator may count prior reductions in impingement mortality and entrainment resulting from the replacement of steam turbine power-generating units with combined-cycle powergenerating units*, towards meeting Track 2 requirements. | Power plant with combined-cycle units installed prior to October 1, 2010 | high |
| #Q007 | design | treatment | mandatory | Large Organism Exclusion Devices | aquatic life | No later than October 1, 2011, the owner or operator of an existing power plant* with an offshore intake * shall install large organism exclusion devices having a distance between exclusion bars of no greater than nine inches, or install other exclusion devices, deemed equivalent by the State Water Board. | Plant possesses an offshore intake | high |
| #Q008 | operational | operational | mandatory | Cease Intake Flows During Non-Generation | aquatic life | No later than October 1, 2011, the owner or operator of an existing power plant* unit that is not directly engaging in power-generating activities *, or critical system maintenance* , shall cease intake flows, unless the owner or operator demonstrates to the State Water Board that a reduced minimum flow is necessary for operations. | Unit is not directly engaging in power-generating activities or critical system maintenance | high |
| #Q009 | corrective_action | treatment | mandatory | Interim Mitigation Measures | aquatic life | The owner or operator of an existing power plant* must implement measures to mitigate the interim impingement and entrainment impacts resulting from the cooling water intake structure(s), commencing October 1, 2015 and continuing up to and until the owner or operator achieves final compliance. The owner or operator must include in the implementation plan, described in Section 3.A below, the specific measures that will be undertaken to comply with this requirement. | high | |
| #Q010 | administrative | reporting | mandatory | Fossil Fueled Units Special Studies and Commitments | aquatic life | Owners or operators of fossil fueled units that have submitted implementation plans to comply with this Policy under Section 2.A(1) and have requested compliance dates after December 31, 2022 that are approved by the State Water Board as provided in Section 3.E shall: (a) Commit to eliminate OTC and seawater use for cooling water purposes for all units at the facility. (b) Conduct a study or studies, singularly or jointly with other facilities, to evaluate new technologies or improve existing technologies to reduce impingement and entrainment. (c) Submit the results of the study and a proposal to minimize entrainment and impingement to the Chief Deputy Director no later than December 31, 2015. (d) Upon approval of the proposal by the Chief Deputy Director, complete implementation of the proposal no later than December 31, 2020. | Fossil fueled units submitted Track 1 implementation plans and requested compliance dates after December 31, 2022 | high |
| #Q011 | administrative | reporting | mandatory | Implementation Plan Submission | aquatic life | With the exception of nuclear-fueled power plants* , which are covered under 3.D, below, no later than April 1, 2011, the owner or operator of an existing power plant* shall submit an implementation plan to the State Water Board. | All existing power plants excluding nuclear-fueled power plants | high |
| #Q012 | reporting | reporting | mandatory | Implementation Plan Contents | aquatic life | The implementation plan shall identify the compliance alternative selected by the owner or operator, describe the general design, construction, or operational measures that will be undertaken to implement the alternative, and propose a realistic schedule for implementing these measures that is as short as possible. If the owner or operator chooses to repower the facility to reduce or eliminate reliance upon OTC, or to retrofit the facility to implement either Track 1 or Track 2 alternatives, the implementation plan shall identify the time period when generating power is infeasible and describe measures taken to coordinate this activity through the appropriate electrical system balancing authority's maintenance scheduling process. | high | |
| #Q013 | reporting | reporting | mandatory | Recycled Water Availability Documentation | aquatic life | If the owner or operator selects closed-cycle wet cooling * as a compliance alternative, the owner or operator shall address in the implementation plan whether recycled water of suitable quality is available for use as makeup water. | Closed-cycle wet cooling selected as compliance alternative | high |
| #Q014 | reporting | reporting | mandatory | Grid Reliability Study Submission | aquatic life | The CAISO and the LADWP shall each submit to the SACCWIS by December 31 and January 31, respectively, each year a grid reliability study for their respective jurisdictions that has been developed pursuant to a public process and approved by their governing bodies. | high | |
| #Q015 | administrative | operational | mandatory | NPDES Permits Reissuance and Modification | aquatic life | The Regional Water Board shall reissue or, as appropriate, modify NPDES permits issued to owners or operators of existing power plants * , after a hearing in the affected region, to ensure that the permits conform to the provisions of this Policy. | high | |
| #Q016 | administrative | reporting | mandatory | NPDES Permit Monitoring Program Requirements | aquatic life | If an owner or operator selects Track 2 as the compliance alternative, the NPDES permit shall include a monitoring program that complies with Section 4 of this Policy. | Track 2 alternative selected | high |
| #Q017 | monitoring | reporting | mandatory | Baseline Impingement Study | aquatic life | A baseline impingement study shall be performed, unless the discharger demonstrates, to the Regional Water Board's satisfaction, that prior studies accurately reflect current impacts. Baseline impingement shall be measured on-site and shall include sampling for all species impinged. The impingement study shall be designed to accurately characterize the species currently impinged and their seasonal abundance to the satisfaction of the Regional Water Board. | high | |
| #Q018 | monitoring | reporting | mandatory | Post-Implementation Impingement Study | aquatic life | After the Track 2 controls are implemented, to confirm the level of impingement controls, another impingement study, consistent with Section 4.A(1)(a) to (d), above, shall be performed and reported to the Regional Water Board. | Track 2 controls are implemented | high |
| #Q019 | monitoring | reporting | mandatory | Baseline Entrainment Study | aquatic life | A baseline entrainment study shall be performed, unless the discharger demonstrates, to the Regional Water Board's satisfaction, that prior studies accurately reflect current impacts... If the Regional Water Board determines that a new baseline entrainment study shall be performed to determine larval composition and abundance in the source water, representative of water that is being entrained, then samples must be collected using a mesh size no larger than 335 microns. Additional samples shall also be collected using a 200 micron mesh to provide a broader characterization of other meroplankton* entrained. | high | |
| #Q020 | monitoring | reporting | mandatory | Entrainment Species Identification and Preservation | aquatic life | Entrainment impacts shall be based on sampling for all ichthyoplankton * and invertebrate meroplankton * species. Individuals collected shall be identified to the lowest taxonomical level practicable. When practicable, genetic identification through molecular biological techniques may be used to assist in compliance with this requirement. Samples shall be preserved and archived such that genetic identification is possible at a later date. | high | |
| #Q021 | monitoring | reporting | mandatory | Post-Implementation Entrainment Study | aquatic life | After the Track 2 controls are implemented, to confirm the level of entrainment controls, another entrainment study (with a study design to the Regional Water Board's satisfaction, with samples collected using a mesh size no larger than 335 microns, and with additional samples also collected using a 200 micron mesh) shall be performed and reported to the Regional Water Board. | Track 2 controls are implemented | high |
| #Q022 | reporting | reporting | mandatory | Discharger Data Provision | drinking water, wastewater, aquatic life | It is the discharger's responsibility to provide all data and other information requested by the RWQCB before the issuance, reissuance, or modification of a permit to the extent feasible. | high | |
| #Q023 | administrative | treatment | mandatory | Priority Pollutant Reasonable Potential Analysis | drinking water, wastewater, aquatic life | The RWQCB shall conduct the analysis in this section for each priority pollutant with an applicable criterion or objective, excluding priority pollutants for which a Total Maximum Daily Load (TMDL) has been developed, to determine if a water quality-based effluent limitation is required in the discharger's permit. | high | |
| #Q024 | administrative | reporting | mandatory | Compliance Schedule Justification | drinking water, wastewater, aquatic life | The discharger shall submit to the RWQCB the following justification before compliance schedules may be authorized in a permit: (a) documentation that diligent efforts have been made to quantify pollutant levels... (b) documentation of source control... (c) a proposed schedule... and (d) a demonstration that the proposed schedule is as short as practicable. | Discharger requests compliance schedule for CTR criteria | high |
| #Q025 | monitoring | reporting | mandatory | Self-Monitoring Programs | drinking water, wastewater, aquatic life | The RWQCB shall require dischargers to conduct self-monitoring programs and shall clearly state in all permits the objective and purpose of the monitoring. | high | |
| #Q026 | monitoring | reporting | mandatory | 2,3,7,8-TCDD Congener Monitoring | drinking water, wastewater, aquatic life | each RWQCB shall require... major and minor POTW and industrial dischargers in its region to conduct effluent monitoring for the 2,3,7,8-TCDD congeners listed above. | Major and minor POTWs and industrial dischargers | high |
| #Q027 | corrective_action | treatment | mandatory | Toxicity Reduction Evaluation (TRE) | aquatic life | If a discharge causes or contributes to chronic toxicity in a receiving water body, a toxicity reduction evaluation (TRE) is required. | Discharge causes or contributes to chronic toxicity | high |
| #Q028 | monitoring | reporting | mandatory | Periodic Monitoring for Non-Limited Pollutants | drinking water, wastewater, aquatic life | The RWQCB shall require periodic monitoring (at least once prior to the issuance and reissuance of a permit) for pollutants for which criteria or objectives apply and for which no effluent limitations have been established; however, the RWQCB may choose to exempt low volume discharges, determined to have no significant adverse impact on water quality, from this monitoring requirement. | Pollutants for which criteria or objectives apply but no effluent limitations are established | high |
| #Q029 | reporting | reporting | mandatory | Standardized Reporting Protocols | drinking water, wastewater, aquatic life | The discharger shall report the results of analytical determinations for the presence of chemical constituents in a sample using the following reporting protocols: 1. Sample results greater than or equal to the RL shall be reported as measured by the laboratory (i.e., the measured chemical concentration in the sample). 2. Sample results less than the RL, but greater than or equal to the laboratory's MDL, shall be reported as 'Detected, but Not Quantified,' or DNQ. The *estimated chemical concentration of the sample shall also be reported. ... 3. Sample results less than the laboratory's MDL shall be reported as 'Not Detected,' or ND. | high | |
| #Q030 | operational | treatment | mandatory | Pollutant Minimization Program Components | drinking water, wastewater, aquatic life | The program shall include, but not be limited to, the following actions and submittals acceptable to the RWQCB: 1. An annual review and semi-annual monitoring of potential sources... 2. Quarterly monitoring for the reportable priority pollutant(s) in the influent... 3. Submittal of a control strategy... 4. Implementation of appropriate cost-effective control measures... and 5. An annual status report... | Evidence priority pollutant is present above limitation and meets DNQ/ND criteria | high |
| #Q031 | design | treatment | mandatory | Mixing Zone Size Limitation | drinking water, wastewater, aquatic life | A mixing zone shall be as small as practicable. | high | |
| #Q032 | administrative | reporting | mandatory | Categorical Exception Project Documentation | drinking water, wastewater, aquatic life | For each project, the discharger shall notify potentially affected public and governmental agencies. Also, the discharger shall submit to the Executive Officer of the appropriate RWQCB, for approval: (1) A detailed description of the proposed action... (2) A time schedule; (3) A discharge and receiving water quality monitoring plan... (4) CEQA documentation; (5) Contingency plans; (6) Identification of alternate water supply (if needed); and (7) Residual waste disposal plans. | Discharger seeking categorical exception | high |
| #Q033 | administrative | treatment | mandatory | Metal Translator Study Plan Approval | aquatic life | The site-specific study plan (including sampling design) must be approved by the RWQCB, after consultation with the California Department of Fish and Game, prior to conducting the study. | Discharger conducting site-specific translator study | high |
| #Q034 | administrative | treatment | mandatory | WQBEL and Technology-Based Limit Comparison | drinking water, wastewater, aquatic life | Regardless of which method is used for deriving water quality-based effluent limitations, the calculated water quality-based effluent limitations shall be compared to the technology-based effluent limitations for the pollutant, and the most protective of the two types of limitations shall be included in the permit. | high | |
| #Q035 | administrative | operational | mandatory | Effluent Change Reevaluation | drinking water, wastewater, aquatic life | Any significant change in effluent quantity or quality shall be cause for reevaluation of effluent limitations. | high | |
| #Q036 | reporting | reporting | mandatory | Interim Compliance Notification | drinking water, wastewater, aquatic life | The interim requirements shall state that the discharger must notify the RWQCB, in writing, no later than 14 days following each interim date, of its compliance or noncompliance with the interim requirements. | Compliance schedule exceeds one year | high |
| #Q037 | monitoring | reporting | mandatory | Laboratory Certification and QA/QC Reporting | drinking water, wastewater, aquatic life | Laboratories analyzing monitoring samples shall be certified by the Department of Health Services, in accordance with the provision of Water Code Section 13176, and must include quality assurance/quality control data with their reports. | high | |
| #Q038 | monitoring | reporting | mandatory | Calibration Standards for Minimum Level | drinking water, wastewater, aquatic life | Dischargers are to instruct laboratories to establish calibration standards so that the ML value (or its equivalent if there is differential treatment of samples relative to calibration standards) is the lowest calibration standard. | high | |
| #Q039 | prohibition | reporting | mandatory | Extrapolation Prohibition | drinking water, wastewater, aquatic life | At no time is the discharger to use analytical data derived from extrapolation beyond the lowest point of the calibration curve. | high | |
| #Q040 | reporting | operational | mandatory | Post-Project Ecological Restoration Certification | aquatic life | Additionally, upon completion of the project, the discharger shall provide certification by a qualified biologist that the receiving water beneficial uses have been restored. | Resource or pest management projects under categorical exceptions | high |
| #Q041 | monitoring | treatment | mandatory | Chronic Toxicity Test Species Requirement | aquatic life | At least three test species with approved test protocols shall be used to measure compliance with the toxicity objective. | Short-term chronic toxicity tests required in permit | high |
| #Q042 | corrective_action | treatment | mandatory | Toxicity Elimination Obligation | aquatic life | Once the source of toxicity is identified, the discharger shall take all reasonable steps necessary to eliminate toxicity. | Source of chronic toxicity identified via TRE | high |
| #Q043 | administrative | treatment | mandatory | Criteria Hardness and pH Adjustment Duty | drinking water, wastewater, aquatic life | When implementing the provisions of this Policy, the RWQCB shall ensure that criteria/objectives are properly adjusted for hardness or pH, if applicable, using the hardness or pH values for the receiving water, and that translators are appropriately applied (in accordance with section 1.4.1), if applicable. | high | |
| #Q044 | operational | operational | mandatory | End-of-Pipe Compliance Application | drinking water, wastewater, aquatic life | Effluent limitations shall apply to the total effluent of a waste discharge at the end-of-pipe, except in the rare situations where it is impractical or infeasible (e.g., where the final discharge point is inaccessible, or the pollutants are so diluted by cooling water as to make monitoring impractical, or interferences among pollutants make analysis infeasible). | high | |
| #Q045 | prohibition | health | mandatory | Drinking Water Intake Mixing Zone Prohibition | drinking water | A mixing zone shall... not (11) be allowed at or near any drinking water intake. | high | |
| #Q046 | prohibition | reporting | mandatory | New Discharger Compliance Schedule Prohibition | drinking water, wastewater, aquatic life | Compliance schedules shall not be allowed in permits for *new dischargers. | New dischargers (constructed after effective date of Policy) | high |
| #Q047 | reporting | reporting | mandatory | Dioxin Congener TEF Sum Reporting | drinking water, wastewater, aquatic life | The RWQCB shall require the discharger to multiply each measured or estimated congener concentration by its respective TEF value (presented above) and report the sum of these values. | TCDD congener monitoring required | high |
| #Q048 | reporting | reporting | mandatory | RL and MDL Sample Reporting | drinking water, wastewater, aquatic life | The RWQCB shall require in the permit that the discharger shall report with each sample result: 1. The Reporting Level (RL) (selected from the MLs listed in Appendix 4 in accordance with section 2.4.2 or established in accordance with section 2.4.3); and 2. The laboratory's current Method Detection Limit (MDL), as determined by the procedure found in 40 CFR 136 (revised as of July 3, 1999). | high | |
| #Q049 | monitoring | reporting | mandatory | TCDD Monitoring Frequency (Major Dischargers) | drinking water, wastewater, aquatic life | each major POTW and major industrial discharger monitor its effluent for the presence of the 17 congeners once during dry weather and once during wet weather each of the three years | Major POTW or major industrial discharger | high |
| #Q050 | reporting | reporting | mandatory | Reference Toxicant Sensitivity Reporting | aquatic life | The sensitivity of the test organisms to a reference toxicant shall be determined concurrently with each bioassay and reported with the test results. | high | |
| #Q051 | prohibition | health | mandatory | Mixing Zone Prohibitions | drinking water, wastewater, aquatic life | A mixing zone shall not: (1) compromise the integrity of the entire water body; (2) cause acutely toxic conditions to aquatic life passing through the mixing zone; (3) restrict the passage of aquatic life; (4) adversely impact biologically sensitive or critical habitats, including, but not limited to, habitat of species listed under federal or State endangered species laws; (5) produce undesirable or nuisance aquatic life; (6) result in floating debris, oil, or scum; (7) produce objectionable color, odor, taste, or turbidity; (8) cause objectionable bottom deposits; (9) cause nuisance; (10) dominate the receiving water body or overlap a mixing zone from different outfalls | high | |
| #Q052 | administrative | reporting | mandatory | AMEL Compliance Determination Protocol | drinking water, wastewater, aquatic life | When determining compliance with an AMEL and more than one sample result is available in a month, the discharger shall compute the arithmetic mean unless the data set contains one or more reported determinations of DNQ or ND. In those cases, the discharger shall compute the median in place of the arithmetic mean in accordance with the following procedure: 1. The data set shall be ranked from low to high, reported ND determinations lowest, DNQ determinations next, followed by quantified values (if any). The order of the individual ND or DNQ determinations is unimportant. 2. The median value of the data set shall be determined. | More than one sample result available in a month including DNQ or ND values | high |
| #Q053 | administrative | reporting | mandatory | Monitoring Program Specification Duty | drinking water, wastewater, aquatic life | the RWQCB shall determine, and specify under the monitoring and reporting requirements, the sampling parameters, monitoring frequencies, locations, and analytical methods to be used. | high | |
| #Q054 | administrative | reporting | mandatory | Mandatory Interim Numeric Limitations | drinking water, wastewater, aquatic life | When a compliance schedule exceeds one year from the date of permit issuance, interim limitations with specific compliance dates (as described in section 2.2.1) shall be included in the NPDES permit. | Compliance schedule exceeds one year | high |
| #Q055 | administrative | treatment | mandatory | Metal Translator Derivation Methodology | aquatic life | The translator shall be derived using the *median of data for translation of chronic criteria and the *90 th percentile of observed data for translation of acute criteria. | Development of site-specific metal translators | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | operational | operational | mandatory | intake flow rate reduction | other | requirement | >= 93 percent | Track 1 compliance, compared to the unit's design intake flow rate | Track 1 | high |
| #P002 | design | operational | mandatory | through-screen intake velocity | other | MAC | <= 0.5 foot per second | Track 1 compliance | Track 1 | high |
| #P003 | operational | operational | mandatory | through-screen intake velocity | other | MAC | <= 0.5 foot per second | Track 2 compliance for impingement mortality, for plants relying solely on reductions in velocity | Track 2 | high |
| #P004 | operational | operational | mandatory | reduction in impingement mortality | other | requirement | >= 90 percent | A 'comparable level' is a level that achieves at least 90 percent of the reduction in impingement mortality required under Track 1 | Track 2 | high |
| #P005 | operational | operational | mandatory | reduction in flow | other | requirement | >= 93 % | as compared to the average actual flow for the corresponding months from 2000 2005 | Track 2 compliance for entrainment, for plants relying solely on reductions in flow | high |
| #P006 | operational | operational | mandatory | reduction in entrainment | other | requirement | >= 90 percent | A 'comparable level' is a level that achieves at least 90 percent of the reduction in entrainment required under Track 1 | Track 2 | high |
| #P007 | design | operational | mandatory | distance between exclusion bars | other | MAC | <= 9 inches | install large organism exclusion devices | owner or operator of an existing power plant with an offshore intake | high |
| #P008 | physical | reporting | mandatory | mesh size | other | MAC | <= 335 microns | baseline entrainment study to determine larval composition and abundance in the source water | If the Regional Water Board determines that a new baseline entrainment study shall be performed | high |
| #P009 | physical | reporting | mandatory | mesh size | other | requirement | 200 micron | to provide a broader characterization of other meroplankton entrained | baseline entrainment study | high |
| #P010 | operational | reporting | mandatory | Baseline Impingement Study Duration | aquatic life | requirement | >= 36 months | The baseline impingement study period to accurately characterize the species currently impinged | Required for Track 2 compliance to establish baseline mortality | high |
| #P011 | operational | reporting | mandatory | Impingement Sampling Duration | aquatic life | requirement | 24 hours | Measurement of impingement during different seasons over specific sampling periods | When cooling system is in operation | high |
| #P012 | operational | reporting | mandatory | Baseline Entrainment Study Duration | aquatic life | requirement | >= 36 months | The baseline entrainment study period to account for variation in oceanographic conditions and larval abundance | Required for Track 2 compliance monitoring | high |
| #P013 | physical | unknown | guideline | Zooplankton Size Threshold | aquatic life | requirement | > 200 microns | Classification of planktonic invertebrates for the purposes of the policy | Definition applies throughout the document | high |
| #P014 | operational | health | mandatory | compliance schedule for CTR actions | drinking water, wastewater, agricultural water, aquatic life, recreational water | requirement | <= 5 years | actions necessary to comply with CTR criterion-based effluent limitations | from date of permit issuance, reissuance, or modification | high |
| #P015 | operational | health | mandatory | compliance schedule for TMDL development | drinking water, wastewater, agricultural water, aquatic life, recreational water | requirement | <= 15 years | development and adoption of a TMDL including waste load and load allocations | from effective date of policy | high |
| #P016 | operational | health | mandatory | total CTR compliance period | drinking water, wastewater, agricultural water, aquatic life, recreational water | requirement | <= 10 years | maximum time to establish and comply with CTR criterion-based effluent limitations | from effective date of policy | high |
| #P017 | operational | health | mandatory | total TMDL compliance period | drinking water, wastewater, agricultural water, aquatic life, recreational water | requirement | <= 20 years | maximum time to develop TMDL and comply with TMDL-derived waste load allocations | from effective date of policy | high |
| #P018 | operational | reporting | mandatory | interim report deadline | wastewater | requirement | <= 14 days | notification following each interim date of compliance or noncompliance | under a compliance schedule | high |
| #P019 | operational | reporting | mandatory | interim requirement frequency | wastewater | requirement | <= 1 year | maximum time between interim dates in a compliance schedule | high | |
| #P020 | operational | operational | mandatory | metal translator study deadline | aquatic life | requirement | <= 2 years | submission of proposed translator and all supporting data/calculations | from date of issuance or reissuance of the permit | high |
| #P021 | operational | reporting | mandatory | TCDD congener monitoring period | aquatic life, drinking water | requirement | 3 years | monitoring for 17 chlorinated dibenzodioxin and dibenzofuran congeners | major POTW and industrial dischargers | high |
| #P022 | microbiological | health | mandatory | chronic toxicity test duration (Pimephales promelas) | aquatic life | requirement | 7 days | larval survival and growth test | fresh water | high |
| #P023 | microbiological | health | mandatory | chronic toxicity test duration (Ceriodaphnia dubia) | aquatic life | requirement | 6-8 days | survival and number of young test | fresh water | high |
| #P024 | microbiological | health | mandatory | chronic toxicity test duration (Selenastrum capricornutum) | aquatic life | requirement | 4 days | growth rate test | fresh water | high |
| #P025 | physical | operational | mandatory | completely-mixed discharge concentration difference | wastewater | MAC | <= 5 percent | difference in pollutant concentration across a transect within two stream widths | accounting for analytical variability | high |
| #P026 | physical | unknown | mandatory | enclosed bay headland distance ratio | other | requirement | < 75 percent | ratio of narrowest distance between headlands to the greatest dimension of the bay | definition of enclosed bays | high |
| #P027 | operational | operational | mandatory | default coefficient of variation | wastewater | requirement | 0.6 dimensionless | Used if number of effluent data points is less than ten or 80 percent of data are not detected | when calculating CV for effluent pollutant concentration data | high |
| #P028 | design | treatment | mandatory | acute metal translator derivation | aquatic life | requirement | 90 percentile | The translator shall be derived using the 90th percentile of observed data for translation of acute criteria | site-specific translator study | high |
| #P029 | physical | operational | mandatory | critical receiving water flow (acute aquatic life) | aquatic life | requirement | 1Q10 flow rate | Lowest flow that occurs for one day with a statistical frequency of once every 10 years | In calculating a dilution ratio for acute aquatic life criteria/objectives | high |
| #P030 | physical | operational | mandatory | critical receiving water flow (chronic aquatic life) | aquatic life | requirement | 7Q10 flow rate | Average low flow that occurs for seven consecutive days with a statistical frequency of once every 10 years | In calculating a dilution ratio for chronic aquatic life criteria/objectives | high |
| #P031 | chemical | health | mandatory | 2,3,7,8-TCDD Toxic Equivalency Factor (TEF) | aquatic life, other | requirement | 1 ratio | Toxic potency of congener relative to 2,3,7,8-TCDD | high | |
| #P032 | chemical | health | mandatory | Arsenic Conversion Factor (Freshwater Acute) | aquatic life | requirement | 1.000 ratio | Used to convert total recoverable metal criterion to dissolved fraction | Freshwater | high |
| #P033 | chemical | health | mandatory | Cadmium Conversion Factor (Freshwater Acute) | aquatic life | requirement | 0.944 ratio | Based on a hardness of 100 mg/l as calcium carbonate | Freshwater at standard hardness | high |
| #P034 | chemical | reporting | mandatory | Benzene Minimum Level (GC) | wastewater | requirement | 0.5 ppb | Minimum Level for use in reporting and compliance determination | Gas Chromatography technique | high |
| #P035 | design | treatment | mandatory | chronic metal translator derivation | aquatic life | requirement | median statistic | The translator shall be derived using the median of data for translation of chronic criteria | site-specific translator study | high |
| #P036 | operational | reporting | mandatory | TCDD monitoring frequency (Major Dischargers) | aquatic life, drinking water | requirement | 2 samples per year | once during dry weather and once during wet weather each of the three years | major POTW and major industrial discharger | high |
| #P037 | operational | reporting | mandatory | TCDD monitoring frequency (Minor Dischargers) | aquatic life, drinking water | requirement | 2 samples per year | once during dry weather and once during wet weather for one year during the three-year period | minor POTW and minor industrial discharger | high |
| #P038 | chemical | health | mandatory | 1,2,3,7,8-PentaCDD Toxic Equivalency Factor | aquatic life | requirement | 1 ratio | Toxic potency relative to 2,3,7,8-TCDD | high | |
| #P039 | chemical | health | mandatory | 1,2,3,4,7,8-HexaCDD Toxic Equivalency Factor | aquatic life | requirement | 0.1 ratio | Toxic potency relative to 2,3,7,8-TCDD | high | |
| #P040 | chemical | health | mandatory | OctaCDD Toxic Equivalency Factor | aquatic life | requirement | 0.0001 ratio | Toxic potency relative to 2,3,7,8-TCDD | high | |
| #P041 | operational | reporting | recommended | matrix effect dilution factor | wastewater | requirement | 10 factor | treatment typically applied in cases where there are matrix-effects is to dilute the sample by a factor of ten | matrix-effects present | high |
| #P042 | operational | reporting | mandatory | semi-volatile organic method factor | wastewater | requirement | 1000 factor | samples concentrated by extraction | most common method-specific factor | high |
| #P043 | physical | operational | mandatory | critical receiving water flow (human health) | drinking water, aquatic life | requirement | harmonic mean flow rate | Used in calculating a dilution ratio for human health criteria/objectives | Inland surface waters, enclosed bays, and estuaries | high |
| #P044 | operational | operational | mandatory | default monthly sampling frequency | wastewater | requirement | 4 samples per month | If the sampling frequency is four times a month or less, n shall be set equal to 4 | Calculation of AMEL and MDEL multipliers | high |
| #P045 | operational | operational | mandatory | 99th percentile z-score | other | requirement | 2.326 z-score | z = 2.326 for 99th percentile probability basis | Used in calculating ECA multipliers for acute and chronic criteria | high |
| #P046 | operational | operational | mandatory | 95th percentile z-score | other | requirement | 1.645 z-score | z = 1.645 for 95th percentile probability basis | Used in calculating AMEL multipliers | high |
| #P047 | operational | reporting | mandatory | volatile organic method factor | wastewater | requirement | 1 factor | No differential treatment specified for sample relative to calibration standards | Most common method-specific factor for volatile organics | high |
| #P048 | operational | reporting | mandatory | pesticides method factor | wastewater | requirement | 100 factor | Samples concentrated by extraction | Most common method-specific factor for pesticides | high |
| #P049 | operational | reporting | mandatory | metals method-specific factors | wastewater | requirement | 0.5, 2, 4 factor | Common analytical practices where samples are diluted or concentrated for metals analysis | most common method-specific factors | high |
| #P050 | operational | operational | mandatory | PMP influent monitoring frequency | wastewater | requirement | 4 times per year | Quarterly monitoring for the reportable priority pollutant(s) in the influent | When conducting a Pollutant Minimization Program | high |
| #P051 | operational | operational | mandatory | PMP potential source monitoring frequency | wastewater | requirement | 2 times per year | Semi-annual monitoring of potential sources of the reportable priority pollutant(s) | When conducting a Pollutant Minimization Program | high |
| #P052 | physical | operational | mandatory | reference hardness for conversion factors | aquatic life | requirement | 100 mg/L | Conversion Factors for Cadmium and Lead are based on a standard hardness value as calcium carbonate | Appendix 3 metal criteria conversion | high |
| #P053 | chemical | health | mandatory | Lead conversion factor equation coefficient | aquatic life | requirement | 1.46203 constant | Lead: Acute and Chronic: CF = 1.46203 - [ln {hardness})(0.145712)] | hardness-dependent conversion | high |
| #P054 | chemical | reporting | mandatory | Phenol Minimum Level (Colorimetric) | wastewater | requirement | 50 ppb | The lowest standard concentration in the calibration curve | Table 2b semi-volatile substances | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #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. | 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). | 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 | 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. | 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. | 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). | high | |
| #D018 | 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 | |
| #D019 | 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 | |
| #D020 | 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 | |
| #D021 | Not Detected (ND) | Sample results which are less than the laboratory's MDL. | high | |
| #D022 | Persistent Pollutants | Persistent pollutants are substances for which degradation or decomposition in the environment is nonexistent or very slow. | high | |
| #D023 | 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 | |
| #D024 | 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). | high | |
| #D025 | 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 | |
| #D026 | Source of Drinking Water | Any water designated as municipal or domestic supply (MUN) in the San Diego Basin Plan. | high | |
| #D027 | 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. | high | |
| #D028 | 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 | |
| #D029 | Bypass | 'Bypass' means the intentional diversion of waste streams from any portion of a treatment facility. (40 CFR § 122.41(m)(1)(i).) | high | |
| #D030 | Severe property damage | '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. | high | |
| #D031 | 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. | high | |
| #D032 | Discharger | Any person or entity that discharges lanthanum-modified clay to canals, ditches, lakes, ponds, reservoirs or other storage or constructed conveyance facilities that are surface waters of the United States (U.S.) for the purpose of inactivating soluble reactive phosphorus. | high | |
| #D033 | 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: median = x(n+1)/2. If n is even, then: median = (xn/2 + x(n/2)+1)/2 (i.e., the midpoint between the (n/2 and ((n/2)+1))). | high | |
| #D034 | Standard Deviation ( σ ) | Standard Deviation is a measure of variability that is calculated as follows: σ = [Σ(x - µ)^2 / (n - 1)]^0.5 where: x is the observed value; µ is the arithmetic mean of the observed values; and n is the number of samples. | high | |
| #D035 | existing Dischargers | Dischargers enrolled under Order No. R9-2012-0063 | high | |
| #D036 | storm water | storm water runoff, snow melt runoff, and surface runoff and drainage. | high | |
| #D037 | illicit discharge | any discharge to a storm water conveyance system that is not composed entirely of storm water except discharges pursuant to an NPDES permit and discharges resulting from firefighting activities. | high | |
| #D038 | Toxicity Identification Evaluation (TIE) | 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 | |
| #D039 | Water Quality Control Plan for the San Diego Basin (Basin Plan) | designates beneficial uses, establishes water quality objectives, and contains implementation programs and policies to achieve those objectives for receiving waters addressed through the plan. | high | |
| #D040 | 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 | |
| #D041 | 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 | |
| #D042 | 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 | |
| #D043 | Wet weather | commonly defined as a storm event with greater than 0.1 inch of rainfall. | high | |
| #D044 | California Toxics Rule (CTR) | a final rule prescribing water quality criteria for toxic pollutants in inland surface waters, enclosed bays, and estuaries in California on May 18, 2000. | high | |
| #D045 | TMDL, or Loading Capacity | the maximum amount of a pollutant that a waterbody can receive and still attain water quality objectives and protection of designated beneficial uses. | high | |
| #D046 | Onsite wastewater treatment system(s) | 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 | |
| #D047 | Pollution Prevention | practices and processes that reduce or eliminate the generation of pollutants, in contrast to source control, treatment, or disposal. | high | |
| #D048 | Wet weather days | days with rainfall events of 0.2 inches or greater and the following 72 hours. | high | |
| #D049 | Dry weather days | days with less than 0.2 inch of rainfall observed on each of the previous 3 days. | high | |
| #D050 | 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. States may include any other waters in this category even if the waters do not meet these criteria. | high | |
| #D051 | 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. States may also include light use or infrequent use coastal recreation waters in this category. | high | |
| #D052 | 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. States may also include infrequent use coastal recreation waters in this category. | high | |
| #D053 | Infrequently Used Full Body Contact | those recreation waters that are rarely or occasionally used. | high | |
| #D054 | Enforcement action | 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 | |
| #D055 | Adaptive management | a structured iterative implementation process that offers flexibility for responsible parties to monitor implementation actions, determine the success of such actions and ultimately, base future management decisions upon the measured results of completed implementation actions and the current state of the system. | high | |
| #D056 | storm water | storm water runoff, snow melt runoff, and surface runoff and drainage. | high | |
| #D057 | illicit discharge | 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 | |
| #D058 | Copermittee | The term Copermittee in this Order refers to any San Diego County, Orange County, or Riverside County Copermittee covered under this Order, unless specified otherwise. | high | |
| #D059 | 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 | |
| #D060 | Restaurants | This category is defined as a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (SIC code 5812). | high | |
| #D061 | Hillside development projects | This category includes development on any natural slope that is twenty-five percent or greater. | high | |
| #D062 | Parking lots | This category is defined as a land area or facility for the temporary parking or storage of motor vehicles used personally, for business, or for commerce. | high | |
| #D063 | Streets, roads, highways, freeways, and driveways | This category is defined as any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles. | high | |
| #D064 | Automotive repair shops | This category is defined as a facility that is categorized in any one of the following Standard Industrial Classification (SIC) codes: 5013, 5014, 5541, 7532-7534, or 7536-7539. | high | |
| #D065 | Retail gasoline outlets (RGOs) | This category includes RGOs that meet the following criteria: (a) 5,000 square feet or more or (b) a projected Average Daily Traffic (ADT) of 100 or more vehicles per day. | high | |
| #D066 | Bypass | 'Bypass' means the intentional diversion of waste streams from any portion of a treatment facility. | high | |
| #D067 | Severe property damage | '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 which 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. | high | |
| #D068 | 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 Copermittee. 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. | high | |
| #D069 | 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 | |
| #D070 | Anthropogenic Litter | Trash generated from human activities, not including sediment. | high | |
| #D071 | 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 | |
| #D072 | 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 | |
| #D073 | 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 | |
| #D074 | 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 | |
| #D075 | 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 | |
| #D076 | BMP Design Manual | A plan developed to eliminate, reduce, or mitigate the impacts of runoff from development projects, including Priority Development Projects. | high | |
| #D077 | 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 | |
| #D078 | 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 | |
| #D079 | 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 | |
| #D080 | 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 | |
| #D081 | 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 | |
| #D082 | 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 | |
| #D083 | 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 | |
| #D084 | Development Projects | Construction, rehabilitation, redevelopment, or reconstruction of any public or private projects. | high | |
| #D085 | Dry Season | May 1 to September 30. | high | |
| #D086 | Dry Weather | Weather is considered dry if the preceding 72 hours has been without measurable precipitation (>0.1 inch). | high |