| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | prohibition | treatment | mandatory | Prohibition of Discharge to Surface Waters | wastewater | The direct or indirect discharge of any wastewater to surface waters or surface water drainage courses is prohibited. | high | |
| #Q002 | prohibition | treatment | mandatory | Prohibition of Cesspools | wastewater | The use of cesspools, an excavation or device that allows wastewater infiltration into the soil without treatment, is prohibited. | high | |
| #Q003 | operational | operational | mandatory | Prevention of Nuisance or Pollution | wastewater | The treatment, storage, and/or disposal of waste in or at the wastewater system shall not cause or contribute to a condition of pollution, contamination, or nuisance as defined in Water Code section 13050. | high | |
| #Q004 | prohibition | treatment | mandatory | Prohibition of Non-Domestic Wastewater Discharge | wastewater | The discharge of wastewater other than domestic wastewater is prohibited. | high | |
| #Q005 | prohibition | operational | mandatory | Prohibition of Bypass or Overflow | wastewater | Bypass or overflow of treated or untreated waste is prohibited. | high | |
| #Q006 | prohibition | treatment | mandatory | Prohibition of Unauthorized Land Discharge | wastewater | The discharge of waste to land not owned, operated, or controlled by the Discharger is prohibited. An exception to this prohibition is when recycled water is used as described in a title 22 Engineering Report approved by DDW. | high | |
| #Q007 | prohibition | health | mandatory | Prohibition of Hazardous Waste Discharge | wastewater | The discharge of waste classified as hazardous (Cal. Code Regs., tit. 23, § 2521(a)), or designated (Wat. Code, § 13173) is prohibited. | high | |
| #Q008 | prohibition | treatment | mandatory | Compliance with Basin Plan | wastewater | The discharge of waste in violation of, or not consistent with, the applicable Regional Water Board's Basin Plan is prohibited. | high | |
| #Q009 | prohibition | health | mandatory | Prohibition of Cross-Connection | wastewater, drinking water | A physical connection between a recycled water system and a potable water system is prohibited. | high | |
| #Q010 | prohibition | treatment | mandatory | Compliance with Recycled Water Report | wastewater, other | The use of recycled water in a manner different than described in the DDW approved title 22 engineering report is prohibited. | high | |
| #Q011 | prohibition | health | mandatory | Prohibition of Equipment Reuse for Potable Water | wastewater, drinking water | Use of equipment used to convey recycled water (e.g. tanks, piping, valves,) also used for potable water supply, is prohibited. | high | |
| #Q012 | operational | operational | mandatory | Flow Limit Compliance | wastewater | The Discharger shall not discharge wastewater in excess of the flow limit(s) specified in the NOA. In no case shall the flow rate of wastewater discharged to the headworks exceed 100,000 gpd as a monthly average. | high | |
| #Q013 | treatment | treatment | mandatory | Demonstration of BPTC | wastewater | Treatment and disposal of wastewater must demonstrate BPTC for domestic wastewater. | high | |
| #Q014 | design | operational | mandatory | Compliance with Basin Plan for Design and Operation | wastewater | The siting, design, construction, operation, maintenance, and monitoring of the wastewater system shall comply with the requirements of the applicable Regional Water Board's Basin Plan. | high | |
| #Q015 | operational | aesthetic | mandatory | Nuisance Odor Control | wastewater | Nuisance odors shall not be perceivable beyond the property line of the wastewater treatment facility. | high | |
| #Q016 | design | health | mandatory | Public Contact Deterrence | wastewater | Public contact with wastewater shall be deterred through such means as fences, signs, and other acceptable alternatives. | high | |
| #Q017 | administrative | reporting | mandatory | Technical Report Preparation Licensure | wastewater | For systems with a design flow rate greater than 3,500 gpd, the technical report required as part of the ROWD shall be prepared by a California licensed professional civil engineer. For systems with a design flow rate less than 3,500 gpd, the technical report shall be prepared by a California licensed professional engineer or other appropriately licensed professional | high | |
| #Q018 | administrative | operational | mandatory | Connection to Centralized System Good Faith Effort | wastewater | For new or expanding Small Domestic Systems within or nearby the boundaries of a centralized wastewater district or regional service area, the Discharger must demonstrate a good faith effort to connect to the centralized system when feasible and practicable, and provide evidence that connection to the system was not approved. | When feasible and practicable for new or expanding systems near a centralized district | high |
| #Q019 | administrative | treatment | mandatory | Implementation of CEQA Mitigation Measures | wastewater, other | The Discharger shall comply with any water quality related mitigation measures adopted in a CEQA document addressing the facility. | high | |
| #Q020 | operational | operational | mandatory | Septic System Service Providers | wastewater | Septic tank and/or leach field service (repairs, pumping, etc.) shall be performed only by a California licensed General Engineering (A), Plumbing (C-36), or Sanitation System (C-42) contractor. | With exceptions allowed by Business and Professions Code sections 7044 and/or 7048 | high |
| #Q021 | reporting | reporting | mandatory | Septic Service Record Keeping | wastewater | The Discharger shall maintain a record of all septic service activities for a minimum of five years. At a minimum, the record shall include the date, nature of service, service company name, and service company state contractor license number. | high | |
| #Q022 | operational | treatment | mandatory | RV Holding Tank Additive Control | wastewater | Owners and/or operators of wastewater systems that accept wastes from RVs or other mobile waste systems must ensure that such wastes do not deleteriously affect the wastewater system or adversely affect beneficial uses of groundwater with holding tank additives that may contain, among other chemicals, formaldehyde, zinc, and/or phenol. | high | |
| #Q023 | treatment | treatment | mandatory | RV Waste Discharge Additional Treatment | wastewater | To the maximum extent possible, RV, portable toilet, or similar wastes shall not be discharged to a septic tank or functionally equivalent system (e.g. Imhoff tank) without subsequent additional treatment (e.g., aerated pond, recirculating sand filter, etc.) prior to disposal. | high | |
| #Q024 | operational | operational | mandatory | Septic Tank Pumping Conditions | wastewater | Septic tanks shall be pumped when any one of the following conditions exists: i. The combined thickness of sludge and scum exceeds one-third of the tank depth of the first compartment. ii. The scum layer is within 3 inches of the outlet device. iii. The sludge layer is within 8 inches of the outlet device. | high | |
| #Q025 | operational | operational | mandatory | Septage Handling and Disposal | wastewater | Septage disposal shall only be to a legal disposal site that has been issued WDRs by a Regional Water Board allowing septage disposal. Septage shall be handled in such a manner as to prevent its reaching surface waters or watercourses. | high | |
| #Q026 | administrative | reporting | mandatory | Aerobic Treatment Unit Sludge Management Plan Submission | wastewater | Within 90 days of the issuance of an NOA, the Discharger shall submit a Sludge Management Plan consistent with the requirements of Provision E.1.c of this General Order. | high | |
| #Q027 | operational | operational | mandatory | Aerobic Treatment Unit Pumping Conditions | wastewater | Aerobic treatment units shall be pumped when any one of the following conditions exists: i. The combined thickness of sludge and scum exceeds one-third of the tank depth of the final settling tank or interferes with the operation of the system (mixed liquor aerator solids shall not exceed the manufacturer's recommendation). ii. The scum layer is within 3 inches of the outlet device. iii. The sludge layer is within 8 inches of the outlet device. | high | |
| #Q028 | administrative | reporting | mandatory | Activated Sludge Systems Sludge Management Plan | wastewater | Within 90 days of the issuance of an NOA, the Discharger shall submit a Sludge Management Plan consistent with the requirements of Provision E.1.c of this General Order. | high | |
| #Q029 | operational | operational | mandatory | Pond Freeboard Maintenance | wastewater | Sufficient freeboard shall be maintained at all times in ponds to provide adequate storage capacity and prevent wastewater spills. Freeboard shall be measured vertically from the lowest elevation of the pond berm to the pond water surface. If freeboard is less than one foot, the discharger shall immediately implement the contingency plan contained in the Spill Prevention and Emergency Response Plan | high | |
| #Q030 | operational | health | mandatory | Pond Mosquito Mitigation | wastewater | All ponds shall be managed to mitigate breeding of mosquitoes including, but not limited to the following: i. An erosion control program shall be implemented... ii. Weeds shall be minimized... iii. Dead algae, vegetation, and debris shall be removed... iv. Coordination with the local mosquito abatement or vector control district... | high | |
| #Q031 | corrective_action | operational | mandatory | Pond Burrowing Animal Control | wastewater | Burrowing animals active in areas that may compromise the integrity of a pond containment shall be promptly controlled and repairs to the containment completed as soon as possible. | high | |
| #Q032 | prohibition | health | mandatory | Subsurface Disposal Surface Surfacing Prohibition | wastewater | Wastewater shall not surface in any location of the disposal area. | high | |
| #Q033 | design | operational | mandatory | Subsurface Disposal Reserve Area | wastewater | Subsurface disposal systems shall hold in reserve sufficient land area for possible future 100-percent replacement of the subsurface disposal system, or establish an equivalent contingency that is approved by the Regional Water Board's Executive Officer and described in the NOA. | high | |
| #Q034 | operational | operational | mandatory | Deep Rooted Plant Removal from Disposal Areas | wastewater | Deep rooted plants such as trees or shrubs shall be removed as needed from a subsurface disposal system area to prevent damage to the dispersal system by roots. | high | |
| #Q035 | administrative | reporting | mandatory | Class V Well Registration | wastewater | Disposal systems that are classified as Class V wells must be registered with USEPA either by completing the online form... or by completing and submitting Form 7520-16: Inventory of Injection Wells. | When subsurface disposal systems are classified as Class V wells | high |
| #Q036 | prohibition | operational | mandatory | Precipitation-Based LAA Application Prohibition | wastewater, other | Wastewater shall not be applied to an LAA within 24 hours of forecasted precipitation with a greater than 50-percent probability of occurring, during precipitation events, or when the LAA surface soil is saturated. | high | |
| #Q037 | prohibition | operational | mandatory | High Wind Spray Irrigation Prohibition | wastewater | Spray irrigation with treated wastewater is prohibited when wind speed (including gusts) exceeds 30 miles per hour. | high | |
| #Q038 | prohibition | treatment | mandatory | LAA Runoff Prohibition | wastewater, other | Discharge of wastewater from an LAA is prohibited. | high | |
| #Q039 | prohibition | health | mandatory | Undisinfected Wastewater LAA Storm Water Prohibition | wastewater, other | If undisinfected wastewater is applied to an LAA, storm water runoff from the LAA is prohibited. | If undisinfected wastewater is applied to an LAA | high |
| #Q040 | operational | health | mandatory | Recycled Water Signage | wastewater | All public use areas where recycled water is used shall be posted with signs that are visible, in a size no less than 4 inches by 8 inches and include the following wording, 'Recycled Water Do Not Drink.' | high | |
| #Q041 | operational | health | mandatory | LAA Mosquito Mitigation | wastewater | Land application areas shall be managed to mitigate breeding of mosquitoes including, but not limited to the following: i. There shall be no standing water 48 hours after application of wastewater. ii. Tailwater ditches must be maintained essentially free of emergent, marginal, or floating vegetation. | high | |
| #Q042 | operational | operational | mandatory | Sludge Storage Requirements | wastewater | Treatment and storage of sludge shall be confined to the wastewater system property, and shall be conducted in a manner that precludes infiltration of waste constituents into soil in a mass or at concentrations that will violate the groundwater limitations of this General Order. | high | |
| #Q043 | operational | treatment | mandatory | Biosolids Disposal Compliance | wastewater | Use and disposal of biosolids shall comply with the USEPA Part 503 Biosolids Rule. (40 C.F.R. § 503.) | high | |
| #Q044 | prohibition | treatment | mandatory | Groundwater and Surface Water Pollution Prohibition | wastewater | The discharge shall not pollute groundwater or surface waters. | high | |
| #Q045 | administrative | operational | mandatory | Spill Prevention and Emergency Response Plan | wastewater | Within 90 days of the issuance of an NOA, aside from residential septic tanks serving four or fewer residences, the Discharger shall prepare and implement a Spill Prevention and Emergency Response Plan (Response Plan) that describes operation and maintenance activities to prevent accidental releases of wastewater, and to effectively respond to such releases, minimizing the environmental impact. | Aside from residential septic tanks serving four or fewer residences | high |
| #Q046 | administrative | reporting | mandatory | Sampling and Analysis Plan (SAP) Preparation | wastewater | Within 90 days of the issuance of an NOA containing an MRP, the Discharger shall prepare and implement a written sampling and analysis plan (SAP) sufficient to assure compliance with the terms of this General Order and the NOA. | If NOA contains an MRP | high |
| #Q047 | prohibition | treatment | mandatory | Bypass Prohibition | wastewater | Bypass (the intentional diversion of waste streams from any portion of a treatment facility) is prohibited. | high | |
| #Q048 | reporting | reporting | mandatory | Capacity Exceedance Notification | wastewater | When any projection shows that capacity of any part of the facilities may be exceeded in 4 years, the Discharger shall notify the Regional Water Board's Executive Officer by March 1st. | When projected capacity will be exceeded in 4 years | high |
| #Q049 | design | operational | mandatory | Wastewater System Siting for Flood Prevention | wastewater | To the maximum extent possible, the wastewater system shall be sited and/or designed to prevent flood or surface water from inundating wastewater ponds or otherwise render the wastewater system inoperable. | high | |
| #Q050 | operational | operational | mandatory | Operator Certification Requirement | wastewater | Wastewater facilities shall be supervised and operated by persons possessing a wastewater treatment operator certificate of the appropriate grade. | Excludes treatment systems that use subsurface disposal per definition | high |
| #Q051 | reporting | reporting | mandatory | Change in Discharge Notification | wastewater | Before making a material change in the character, location, or volume of discharge, the Discharger shall notify the Regional Water Board Executive Officer. | high | |
| #Q052 | corrective_action | operational | mandatory | Reasonable Steps for Noncompliance | wastewater | The Discharger shall take all reasonable steps to minimize any adverse impact to waters of the state resulting from noncompliance with this General Order. Such steps shall include accelerated or additional monitoring as necessary to determine the nature and impact of the noncompliance. | In event of noncompliance | high |
| #Q053 | design | operational | mandatory | Equipment Safeguards | wastewater | For any electrically operated equipment at the site, the failure of which would cause loss of control or containment of waste materials, or violation of this General Order, the Discharger shall employ safeguards to prevent loss of control over wastes. | high | |
| #Q054 | reporting | reporting | mandatory | Noncompliance Telephone Notification | wastewater | If the Discharger does not comply, or will be unable to comply, with a limit related to effluent quality, pond freeboard, flow rate, the title 22 engineering report requirements, or bypass or overflow issues, the Discharger shall notify the Regional Water Board staff by telephone. | Upon knowledge of noncompliance | high |
| #Q055 | reporting | reporting | mandatory | Containment Failure Notification to CalOES | wastewater | In the event of a wastewater containment failure, the Discharger shall immediately notify CalOES. | Upon wastewater containment failure | high |
| #Q056 | monitoring | reporting | mandatory | Laboratory Certification Requirement | wastewater | Unless otherwise approved by the Regional Water Board's Executive Officer, all analyses shall be conducted at a laboratory certified for the analyses by the DDW Environmental Laboratory Accreditation Program. | high | |
| #Q057 | reporting | reporting | mandatory | Record Retention | wastewater | The Discharger shall retain records of all monitoring information, including all calibration and maintenance records... Records shall be maintained for a minimum of 3 years from the date of the sample, measurement, report, or application. | high | |
| #Q058 | monitoring | operational | mandatory | Instrument Maintenance and Calibration | wastewater | All monitoring and analysis instruments and devices used by the Discharger to fulfill the prescribed MRP shall be properly maintained and calibrated as recommended by the manufacturer to ensure their continued accuracy. | high | |
| #Q059 | design | operational | mandatory | Groundwater Monitoring Well Construction | wastewater | The Discharger shall construct all groundwater monitoring wells to meet or exceed the standards stated in Department of Water Resources' Bulletins 74-81, 74-90, and subsequent revisions unless deviation is approved... | high | |
| #Q060 | monitoring | reporting | mandatory | Representative Samples Recording | wastewater | The name of the sampler, sample type (grab or composite), time, date, location, bottle type, and any preservative used for each sample shall be recorded on the sample chain of custody form. | high | |
| #Q061 | monitoring | operational | mandatory | Groundwater Monitoring Pre-Sampling Procedures | wastewater | Prior to sampling, groundwater elevations shall be measured and the wells shall be purged of at least three well volumes and until pH and electrical conductivity have stabilized. | high | |
| #Q062 | monitoring | operational | mandatory | Surface Water Bacteria Sample Procedures | wastewater | It is critical when monitoring bacteria that all containers and surfaces a sample contacts are sterile. Sample containers must be autoclaved or manufactured to maintain sterility... | When monitoring bacteria in surface water | high |
| #Q063 | reporting | reporting | mandatory | Quarterly Monitoring Reports Submission | wastewater | Quarterly reports shall be submitted to the Regional Water Board on the first day of the second month after the quarter ends (e.g. the January-March Quarterly Report is due by May 1 st ). | high | |
| #Q064 | reporting | reporting | mandatory | Annual Report Submission | wastewater | Annual Reports shall be submitted to the Regional Water Board by March 1 st following the monitoring year . | high | |
| #Q065 | administrative | reporting | mandatory | Discharger Data Provision Responsibility | 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 | |
| #Q066 | reporting | reporting | mandatory | Compliance Schedule Justification Requirement | 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 in the discharge and the sources of the pollutant in the waste stream, and the results of those efforts; (b) documentation of source control and/or pollution minimization efforts currently underway or completed; (c) a proposed schedule for additional or future source control measures, *pollutant minimization actions, or waste treatment (i.e., facility upgrades); and (d) a demonstration that the proposed schedule is as short as practicable. | Before compliance schedules may be authorized in a permit | high |
| #Q067 | monitoring | operational | mandatory | Discharger Self-Monitoring Program Requirement | 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 | |
| #Q068 | reporting | reporting | mandatory | Priority Pollutant 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... 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... 3. Sample results less than the laboratory's MDL shall be reported as 'Not Detected,' or ND. | high | |
| #Q069 | corrective_action | treatment | mandatory | Pollutant Minimization Program Requirement | drinking water, wastewater, aquatic life | Dischargers shall be required to conduct a Pollutant Minimization Program (PMP) in accordance with section 2.4.5.1 when there is evidence... that the priority pollutant is present in the effluent above an effluent limitation and either: a. A sample result is reported as DNQ and the effluent limitation is less than the RL; or b. A sample result is reported as ND and the effluent limitation is less than the MDL. | When evidence exists that priority pollutant is present above effluent limitation but below reporting levels | high |
| #Q070 | monitoring | reporting | mandatory | TCDD Congener Monitoring Requirement | drinking water, wastewater, aquatic life | each RWQCB shall require (as described below) major and minor POTW and industrial dischargers in its region to conduct effluent monitoring for the 2,3,7,8-TCDD congeners listed above. | high | |
| #Q071 | corrective_action | treatment | mandatory | Toxicity Reduction Evaluation Requirement | aquatic life | If a discharge causes or contributes to chronic toxicity in a receiving water body, a *toxicity reduction evaluation (TRE) is required. | If a discharge causes or contributes to chronic toxicity | high |
| #Q072 | administrative | reporting | mandatory | Laboratory Certification and QA/QC Data | 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 | |
| #Q073 | corrective_action | treatment | mandatory | Pollutant Minimization Program Actions | 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... 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... 5. An annual status report... | high | |
| #Q074 | reporting | reporting | mandatory | Reporting of TCDD Equivalents Sum | 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. | high | |
| #Q075 | corrective_action | treatment | mandatory | Elimination of Toxicity Source | aquatic life | Once the source of toxicity is identified, the discharger shall take all reasonable steps necessary to eliminate toxicity. | Once source of toxicity is identified | high |
| #Q076 | administrative | reporting | mandatory | Categorical Exception Application Requirements | drinking water, other | 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... and (7) Residual waste disposal plans. | When seeking categorical exceptions for resource or pest management or drinking water maintenance | high |
| #Q077 | prohibition | reporting | mandatory | Analytical Data 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 | |
| #Q078 | reporting | reporting | mandatory | Compliance Notification for Interim Dates | 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. | Following each interim date in a compliance schedule | high |
| #Q079 | administrative | operational | mandatory | 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. | Prior to conducting the site-specific translator study | high |
| #Q080 | administrative | operational | mandatory | Translator Study Application Requirements | aquatic life | the discharger, in the permit application, (1) commits to (a) completing a defensible site-specific translator study and (b) proposing a dissolved to total recoverable translator to the RWQCB, and (2) describes the method(s) to be used in developing the translator | When proposing a translator in the permit application | high |
| #Q081 | reporting | reporting | mandatory | Translator Study Submission Requirement | aquatic life | the discharger, within a time period specified by the RWQCB not exceeding two years from the date of issuance/reissuance of the permit, submits to the RWQCB (1) the proposed translator, and (2) all data and calculations related to its derivation. | Within two years of permit issuance/reissuance | high |
| #Q082 | administrative | operational | mandatory | Mixing Zone Study for Incompletely-Mixed Discharges | aquatic life, drinking water | Dilution credits and mixing zones for incompletely-mixed discharges shall be considered by the RWQCB only after the discharger has completed an independent mixing zone study and demonstrated to the satisfaction of the RWQCB that a dilution credit is appropriate. | For incompletely-mixed discharges seeking dilution credits | high |
| #Q083 | operational | reporting | mandatory | Calibration Standard Establishment Instruction | aquatic life, drinking water, wastewater | 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 | |
| #Q084 | administrative | reporting | mandatory | Categorical Exception Public Notification | other | For each project, the discharger shall notify potentially affected public and governmental agencies. | When implementing projects under categorical exceptions | high |
| #Q085 | reporting | operational | mandatory | Biological Restoration Certification | aquatic life | upon completion of the project, the discharger shall provide certification by a qualified biologist that the receiving water beneficial uses have been restored. | Upon completion of projects under categorical exceptions | high |
| #Q086 | administrative | operational | mandatory | RWQCB Hardness and pH Adjustment Requirement | 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 | |
| #Q087 | monitoring | reporting | mandatory | Periodic Monitoring for Priority 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 | Applies to pollutants with criteria/objectives but no established effluent limits; low volume discharges may be exempted | high |
| #Q088 | administrative | operational | mandatory | Comparison with Technology-Based Effluent Limitations | 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 | |
| #Q089 | operational | operational | mandatory | End-of-Pipe Effluent Limitation 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 | Exceptions allowed if final discharge point is inaccessible or if cooling water dilution/interference makes monitoring impractical | high |
| #Q090 | operational | operational | mandatory | Interim Numeric Limitations for Long Compliance Schedules | 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. | Applies when compliance schedule is longer than one year | high |
| #Q091 | reporting | reporting | mandatory | Compliance Determination Arithmetic Mean and Median Calculation | 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 | Applies when more than one sample is available per month | high |
| #Q092 | monitoring | operational | mandatory | Toxicity Test Species Count | aquatic life | At least three test species with approved test protocols shall be used to measure compliance with the toxicity objective. | Test species should include a vertebrate, an invertebrate, and an aquatic plant if possible | high |
| #Q093 | corrective_action | treatment | mandatory | Toxicity Reduction Evaluation Permit Requirements | aquatic life | The following shall be incorporated into permits: (1) a requirement to conduct a TRE if repeated tests reveal toxicity as a result of the waste discharge; (2) a provision requiring a discharger to take all reasonable steps to control toxicity once the source of toxicity is identified; and (3) a statement that failure to conduct required toxicity tests or a TRE within a designated period shall result in the establishment of effluent limitations for chronic toxicity | high | |
| #Q094 | administrative | operational | mandatory | Site-Specific Objective Development Consistency | drinking water, wastewater, aquatic life | Water quality objectives shall be developed in a manner consistent with State and federal law and regulations. | high | |
| #Q095 | prohibition | operational | mandatory | Mixing Zone Prohibitions | drinking water, aquatic life, recreational water | 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; or (11) be allowed at or near any drinking water intake. | high | |
| #Q096 | design | operational | mandatory | Mixing Zone Size Limitation | drinking water, aquatic life, recreational water | A mixing zone shall be as small as practicable. | high | |
| #Q097 | prohibition | operational | mandatory | Compliance Schedule Prohibition for New Dischargers | drinking water, wastewater, aquatic life | Compliance schedules shall not be allowed in permits for *new dischargers. | high | |
| #Q098 | operational | operational | mandatory | Interim Numeric Limitation Stringency | drinking water, wastewater, aquatic life | Numeric interim limitations for the pollutant must be based on current treatment facility performance or on existing permit limitations, whichever is more stringent. | high | |
| #Q099 | administrative | operational | mandatory | More Restrictive Effluent Limitation Requirement | drinking water, wastewater, aquatic life | The RWQCB shall impose more restrictive water quality-based effluent limitations (e.g., discharge prohibitions established in accordance with Water Code Section 13243) where necessary for the protection of beneficial uses or where otherwise required by law. | high | |
| #Q100 | operational | treatment | mandatory | Intake Water Pollutant Non-Alteration Requirement | drinking water, wastewater, aquatic life | The facility does not alter the intake water pollutant chemically or physically in a manner that adversely affects water quality and beneficial uses | When establishing water quality-based effluent limitations considering intake water pollutants | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | operational | operational | mandatory | Maximum Monthly Average Flow Rate | wastewater | MAC | <= 100000 gpd | In no case shall the flow rate of wastewater discharged to the headworks exceed 100,000 gpd as a monthly average. | All Wastewater Systems | high |
| #P002 | operational | treatment | mandatory | Nitrogen Control Flow Threshold | wastewater | requirement | > 20000 gpd | For flow rates greater than 20,000 gpd, the discharge must be evaluated as described in Attachment 1 to determine if nitrogen effluent limits are required. | All Wastewater Systems | high |
| #P003 | operational | operational | mandatory | Septic Tank Scum Layer Limit | wastewater | requirement | <= 3 inches | Septic tanks shall be pumped when any one of the following conditions exists: ... The scum layer is within 3 inches of the outlet device. | Septic Systems | high |
| #P004 | operational | operational | mandatory | Septic Tank Sludge Layer Limit | wastewater | requirement | <= 8 inches | Septic tanks shall be pumped when any one of the following conditions exists: ... The sludge layer is within 8 inches of the outlet device. | Septic Systems | high |
| #P005 | design | operational | mandatory | Pond Freeboard Minimum | wastewater | requirement | >= 2 feet | The calculations shall demonstrate adequate capacity to maintain two feet of freeboard in the pond(s). | Pond Systems | high |
| #P006 | chemical | aesthetic | guidance | Pond Dissolved Oxygen Indicator | wastewater | OG | < 1.0 mg/L | A dissolved oxygen concentration less than 1.0 mg/L in the upper one foot of any wastewater pond shall be evidence of the potential to generate objectionable odors. | Pond Systems | high |
| #P007 | chemical | treatment | mandatory | Activated Sludge BOD Limit (Monthly Average) | wastewater | MAC | <= 30 mg/L | Activated Sludge, MBR, or similar ... BOD ... 30 (monthly average) | Activated Sludge, MBR, or similar (not including residential aerobic treatment units) | high |
| #P008 | chemical | treatment | mandatory | Activated Sludge BOD Limit (7-day Average) | wastewater | MAC | <= 45 mg/L | Activated Sludge, MBR, or similar ... BOD ... 45 (7-day average) | Activated Sludge, MBR, or similar (not including residential aerobic treatment units) | high |
| #P009 | physical | treatment | mandatory | Activated Sludge TSS Limit (Monthly Average) | wastewater | MAC | <= 30 mg/L | Activated Sludge, MBR, or similar ... TSS ... 30 (monthly average) | Activated Sludge, MBR, or similar (not including residential aerobic treatment units) | high |
| #P010 | physical | treatment | mandatory | Activated Sludge TSS Limit (7-day Average) | wastewater | MAC | <= 45 mg/L | Activated Sludge, MBR, or similar ... TSS ... 45 (7-day average) | Activated Sludge, MBR, or similar (not including residential aerobic treatment units) | high |
| #P011 | chemical | treatment | mandatory | Wastewater Pond BOD Limit | wastewater | MAC | <= 90 mg/L | Wastewater Pond or Trickling Filter ... BOD ... 90 | Limit applies when treated wastewater is applied to an LAA or to a subsurface disposal system. The limit is based on a 65-percent reduction of incoming BOD. | high |
| #P012 | chemical | treatment | mandatory | Total N Limit (Low Threat) | wastewater | requirement | >= 50 % | Total N ... Low Threat ... 50% | flow rate >20,000 gpd. The value represents the minimum percent reduction compared to the untreated wastewater value. | high |
| #P013 | chemical | treatment | mandatory | Total N Limit (High Threat) | wastewater | MAC | <= 10 mg/L | Total N ... High Threat ... 10 | flow rate >20,000 gpd | high |
| #P014 | operational | operational | mandatory | Track 1 Intake Flow Rate Reduction | aquatic life | MAC | >= 93 % | A minimum 93 percent reduction in intake flow rate* for each unit is required for Track 1 compliance, compared to the unit's design intake flow rate*. | Track 1 compliance | high |
| #P015 | physical | operational | mandatory | Track 1 Through-Screen Intake Velocity | aquatic life | MAC | <= 0.5 foot per second | The through-screen intake velocity must not exceed 0.5 foot per second. | Track 1 compliance | high |
| #P016 | physical | operational | mandatory | Track 2 Impingement Mortality Velocity Limit | aquatic life | MAC | <= 0.5 foot per second | For plants relying solely on reductions in velocity, by monthly verification of through-screen intake velocity not to exceed 0.5 foot per second | Track 2 compliance relying solely on velocity | high |
| #P017 | operational | treatment | mandatory | Track 2 Impingement Mortality Comparable Level | aquatic life | MAC | >= 90 % | A 'comparable level' is a level that achieves at least 90 percent of the reduction in impingement mortality required under Track 1. | Track 2 compliance using monitoring | high |
| #P018 | operational | operational | mandatory | Track 2 Entrainment Flow Reduction | aquatic life | MAC | >= 93 % | a minimum of 93% reduction in flow, as compared to the average actual flow for the corresponding months from 2000 2005, must be met | Track 2 compliance relying solely on flow reductions | high |
| #P019 | operational | treatment | mandatory | Track 2 Entrainment Comparable Level | aquatic life | MAC | >= 90 % | A 'comparable level' is a level that achieves at least 90 percent of the reduction in entrainment required under Track 1. | Track 2 compliance using control technologies | high |
| #P020 | design | operational | mandatory | Offshore Intake Exclusion Bar Spacing | aquatic life | requirement | <= 9 inches | install large organism exclusion devices having a distance between exclusion bars of no greater than nine inches | existing power plant with an offshore intake | high |
| #P021 | operational | reporting | mandatory | Baseline Impingement Study Duration | aquatic life | requirement | >= 36 consecutive months | The study period shall be at least 36 consecutive months. | Baseline impingement study | high |
| #P022 | physical | reporting | mandatory | Baseline Entrainment Sampling Mesh Size | aquatic life | requirement | <= 335 microns | samples must be collected using a mesh size no larger than 335 microns. | Baseline entrainment study | high |
| #P023 | physical | reporting | mandatory | Baseline Entrainment Additional Sampling Mesh Size | aquatic life | requirement | 200 microns | Additional samples shall also be collected using a 200 micron mesh to provide a broader characterization of other meroplankton* entrained. | Baseline entrainment study | high |
| #P024 | operational | reporting | mandatory | Baseline Entrainment Study Duration | aquatic life | requirement | >= 36 consecutive months | The study period shall be at least 36 consecutive months | Baseline entrainment study | high |
| #P025 | physical | unknown | guideline | Zooplankton Size Threshold | aquatic life | requirement | > 200 microns | For purposes of this Policy, refers to those planktonic invertebrates larger than 200 microns. | Definition of Zooplankton | high |
| #P026 | operational | reporting | mandatory | Meeting Notice Lead Time | other | requirement | >= 10 days | Meetings shall be open to the public and shall be noticed at least 10 days in advance of the meeting. | SACCWIS and Review Committee meetings | high |
| #P027 | operational | operational | guideline | Cost Evaluation Amortization Period | other | requirement | 20 years | Costs of compliance in terms of total dollars and dollars per megawatt hour of electrical energy produced over an amortization period of 20 years | Evaluation of Policy modifications for nuclear-fueled power plants | high |
| #P028 | operational | reporting | mandatory | State Water Board Hearing Deadline (LADWP) | other | requirement | <= 45 days | Within 45 days of receiving a written notice from LADWP, the State Water Board shall conduct a hearing in accordance with paragraph (d) to determine whether to suspend the final compliance date. | Upon LADWP Commission determination of reliability necessity | high |
| #P029 | operational | reporting | mandatory | CAISO Notification Objection Period | other | requirement | <= 10 days | If the Executive Directors of the CEC and CPUC do not object in writing within 10 days to CAISO's written notification, the notification provided pursuant to this paragraph will suspend the final compliance date | Short-term reliability necessity determination by CAISO | high |
| #P030 | operational | operational | mandatory | Short-Term Compliance Date Suspension Limit | other | requirement | <= 90 days | the notification provided pursuant to this paragraph will suspend the final compliance date for the shorter of 90 days or the time CAISO determines necessary to maintain reliability. | Short-term reliability necessity within CAISO jurisdiction | high |
| #P031 | physical | reporting | mandatory | Additional Meroplankton Sampling Mesh Size | aquatic life | requirement | 200 microns | Additional samples shall also be collected using a 200 micron mesh to provide a broader characterization of other meroplankton* entrained. | Baseline and Track 2 entrainment studies | high |
| #P032 | operational | operational | guideline | Cost Amortization Period | other | requirement | 20 years | Costs of compliance in terms of total dollars and dollars per megawatt hour of electrical energy produced over an amortization period of 20 years | Evaluation of nuclear plant policy modifications | high |
| #P033 | operational | reporting | mandatory | LADWP Hearing Deadline | other | requirement | <= 45 days | Within 45 days of receiving a written notice from LADWP, the State Water Board shall conduct a hearing | Upon LADWP notification of short-term reliability necessity | high |
| #P034 | operational | reporting | mandatory | Impingement Sampling Duration | aquatic life | requirement | 24 hour | Impingement shall be measured during different seasons when the cooling system is in operation and over 24-hour sampling periods. | Baseline and Track 2 impingement studies | high |
| #P035 | operational | reporting | mandatory | Post-Implementation Impingement Study Duration | aquatic life | requirement | >= 36 consecutive months | After the Track 2 controls are implemented... another impingement study, consistent with Section 4.A(1)(a) to (d), above, shall be performed | Post-implementation verification for Track 2 | high |
| #P036 | physical | reporting | mandatory | Post-Implementation Entrainment Mesh Size | aquatic life | requirement | <= 335 microns | another entrainment study... with samples collected using a mesh size no larger than 335 microns | Post-implementation verification for Track 2 | high |
| #P037 | physical | reporting | mandatory | Post-Implementation Entrainment Additional Mesh Size | aquatic life | requirement | 200 microns | with additional samples also collected using a 200 micron mesh | Post-implementation verification for Track 2 | high |
| #P038 | operational | operational | mandatory | Compliance Schedule Limit (CTR actions) | drinking water, wastewater | requirement | <= 5 years | Up to five years from the date of permit issuance, reissuance, or modification to complete actions (such as pollutant minimization or facility upgrades) necessary to comply with CTR criterion-based effluent limitations. | With or without a TMDL | high |
| #P039 | operational | operational | mandatory | Compliance Schedule Limit (TMDL Development) | drinking water, wastewater | requirement | <= 15 years | Up to 15 years from the effective date of this Policy to develop and adopt a TMDL, and accompanying Waste Load Allocations (WLAs) and Load Allocations (LAs). | TMDL-based compliance schedule | high |
| #P040 | operational | operational | mandatory | Maximum Compliance Period (CTR) | drinking water, wastewater | requirement | <= 10 years | In no case shall a compliance schedule for these dischargers exceed, from the effective date of this Policy: (a) 10 years to establish and comply with CTR criterion-based effluent limitations. | From effective date of Policy | high |
| #P041 | operational | operational | mandatory | Maximum Compliance Period (TMDL/CTR) | drinking water, wastewater | requirement | <= 20 years | In no case shall a compliance schedule exceed, from the effective date of this Policy... (b) 20 years to develop and adopt a TMDL, and to establish and comply with WLAs derived from a TMDL for a CTR criterion. | 15 years to complete TMDL + 5 years to comply | high |
| #P042 | operational | operational | mandatory | Metal Translator Study Deadline | drinking water, wastewater | requirement | <= 2 years | An interim deadline to submit the results of the study shall be specified by the RWQCB, and shall not exceed two years from the date of issuance/reissuance of the permit. | While a translator study is being conducted | high |
| #P043 | chemical | health | mandatory | Toxic Equivalency Factor (2,3,7,8-TetraCDD) | drinking water, wastewater | requirement | 1 unitless | The current TEFs for the 17 congeners... are shown in Table 4. | high | |
| #P044 | chemical | health | mandatory | Toxic Equivalency Factor (OctaCDD) | drinking water, wastewater | requirement | 0.0001 unitless | The current TEFs for the 17 congeners... are shown in Table 4. | high | |
| #P045 | operational | reporting | mandatory | TCDD Monitoring Frequency (Major Dischargers) | drinking water, wastewater | requirement | 2 samples/year | 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 POTWs and industrial dischargers | high |
| #P046 | chemical | health | mandatory | Fathead Minnow Chronic Test Duration | aquatic life | requirement | 7 days | fathead minnow (Pimephales promelas) larval survival; growth | Short-term Methods for Estimating Chronic Toxicity-Fresh Water | high |
| #P047 | chemical | operational | mandatory | Conversion Factor (Arsenic Freshwater) | aquatic life | requirement | 1.000 unitless | Conversion Factor (CF) for Freshwater Acute and Chronic Criteria for Arsenic. | For converting total recoverable fraction to dissolved fraction | high |
| #P048 | chemical | reporting | mandatory | ML for 1,1 Dichloroethane (GC) | drinking water, wastewater | requirement | 0.5 ppb | Minimum Levels (MLs) for volatile substances using Gas Chromatography. | high | |
| #P049 | operational | operational | mandatory | Compliance Schedule - Actions | drinking water, wastewater | requirement | <= 5 years | to complete actions (such as pollutant minimization or facility upgrades) necessary to comply with CTR criterion-based effluent limitations | from the date of permit issuance, reissuance, or modification | high |
| #P050 | operational | operational | mandatory | Compliance Schedule - TMDL Development | drinking water, wastewater | requirement | <= 15 years | to develop and adopt a TMDL, and accompanying Waste Load Allocations (WLAs) and Load Allocations (LAs) | from the effective date of this Policy | high |
| #P051 | operational | operational | mandatory | Maximum Compliance Period - CTR | drinking water, wastewater | requirement | <= 10 years | to establish and comply with CTR criterion-based effluent limitations | from the effective date of this Policy | high |
| #P052 | operational | operational | mandatory | Maximum Compliance Period - TMDL derived | drinking water, wastewater | requirement | <= 20 years | to develop and adopt a TMDL, and to establish and comply with WLAs derived from a TMDL for a CTR criterion | from the effective date of this Policy | high |
| #P053 | chemical | health | mandatory | TEF - 1,2,3,7,8-PentaCDD | drinking water, wastewater | requirement | 1 unitless | Toxic Equivalency Factor (TEF) for 2,3,7,8-TCDD Equivalents | high | |
| #P054 | chemical | health | mandatory | TEF - 2,3,4,7,8-PentaCDF | drinking water, wastewater | requirement | 0.5 unitless | Toxic Equivalency Factor (TEF) for 2,3,7,8-TCDD Equivalents | high | |
| #P055 | microbiological | health | mandatory | Chronic Toxicity Test - Water Flea | aquatic life | requirement | 6 to 8 days | water flea (Ceriodaphnia dubia) survival; number of young | Fresh Water organisms | high |
| #P056 | microbiological | health | mandatory | Chronic Toxicity Test - Alga | aquatic life | requirement | 4 days | alga (Selenastrum capricornutum) growth rate | Fresh Water organisms | high |
| #P057 | chemical | treatment | mandatory | Conversion Factor - Cadmium (Freshwater Acute) | aquatic life | requirement | 0.944 unitless | Conversion Factor for converting total recoverable fraction to dissolved fraction | Hardness dependent, based on 100 mg/L as CaCO3 | high |
| #P058 | operational | treatment | mandatory | Default Coefficient of Variation (CV) | drinking water, wastewater | requirement | 0.6 unitless | The CV shall be set equal to 0.6 | number of effluent data points < 10, or >= 80 percent of data are non-detected | high |
| #P059 | physical | operational | guideline | Completely-mixed discharge condition threshold | drinking water, wastewater | requirement | <= 5 % | not more than a 5 percent difference in the concentration of a pollutant exists across a transect | at a point within two stream/river widths from the discharge point | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | ACUTELY TOXIC CONDITIONS | as used in the context of mixing zones, refers to lethality that occurs to mobile aquatic organisms that move or drift through the mixing zone. | 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: Arithmetic mean = = µ Σ x / n 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) | means the highest allowable average of daily pollutant discharges over a calendar month, calculated as the sum of all daily discharges measured during a calendar month divided by the number of measurements. | high | |
| #D004 | BEST MANAGEMENT PRACTICES (BMPs) | are methods, measures, or practices designed and selected to reduce or eliminate the discharge of pollutants to surface waters from point and nonpoint source discharges including storm water. BMPs include structural and non-structural controls, and operation and maintenance procedures, which can be applied before, during, and/or after pollution producing activities. | high | |
| #D005 | BIOACCUMULATIVE | pollutants are 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 | BIOLOGICALLY-BASED RECEIVING WATER FLOW | refers to the method for determining receiving water flows developed by the U.S. EPA Office of Research and Development which directly uses the averaging periods and exceedance frequencies specified in the acute and chronic aquatic life criteria for individual pollutants (e.g., 1 day and 3 years for acute criteria, and 4 days and 3 years for the chronic criteria). Biologically-based flows can be calculated using the program DFLOW. | high | |
| #D007 | CARCINOGENIC | pollutants are substances that are known to cause cancer in living organisms. | high | |
| #D008 | COEFFICIENT OF VARIATION ( 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 | |
| #D009 | COMPLETELY-MIXED DISCHARGE | condition means not more than a 5 percent difference, accounting for analytical variability, in the concentration of a pollutant exists across a transect of the water body at a point within two stream/river widths from the discharge point. | high | |
| #D010 | DILUTION CREDIT | is the amount of dilution granted to a discharge in the calculation of a water quality-based effluent limitation, based on the allowance of a specified mixing zone. It is calculated from the dilution ratio or determined through conducting a mixing zone study or modeling of the discharge and receiving water. | high | |
| #D011 | DILUTION RATIO | is the critical low flow of the upstream receiving water divided by the flow of the effluent discharged. | high | |
| #D012 | DISCHARGER-SPECIFIC WER | is a WER that is applied to individual pollutant limits in an NPDES permit issued to a particular permit holder. A discharger-specific WER applies only to the applicable limits in the discharger's permit. Discharger-specific WERs are distinguished for WERs that are developed on a waterbody or watershed basis as part of a water quality standards action resulting in adoption of an SSO. | high | |
| #D013 | DYNAMIC MODELS | used for calculating effluent limitations predict the effects of receiving water and effluent flow and of concentration variability. The outputs of dynamic models can be used to base effluent limitations on probability estimates of receiving water concentrations rather than critical conditions (which are used in the steady-state model). The three dynamic modeling techniques recommended by the U.S. EPA for calculating effluent limitations are continuous simulation, Monte Carlo simulation, and lognormal probability modeling. | high | |
| #D014 | EFFLUENT CONCENTRATION ALLOWANCE (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 longterm 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 | |
| #D015 | 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 | |
| #D016 | ESTIMATED CHEMICAL CONCENTRATION | is the estimated chemical concentration that results from the confirmed detection of the substance by the analytical method below the ML value. | high | |
| #D017 | 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 | |
| #D018 | EXISTING DISCHARGER | means any discharger that is not a new discharger. An existing discharger includes an 'increasing discharger' (i.e., an existing facility with treatment systems in place for its current discharge that is or will be expanding, upgrading, or modifying its existing permitted discharge after the effective date of this Policy). | high | |
| #D019 | FOUR-DAY AVERAGE OF DAILY MAXIMUM FLOWS | is the average of daily maximums taken from the data set in four-day intervals. | high | |
| #D020 | HARMONIC MEAN | flows are expressed as Qhm = (n)/( Σ n i=1 1/xi), where xi = specific data values and n = number of data values. | high | |
| #D021 | INCOMPLETELY-MIXED DISCHARGE | is a discharge that contributes to a condition that does not meet the meaning of a completely-mixed discharge condition. | high | |
| #D022 | INFEASIBLE | means not capable of being accomplished in a successful manner within a reasonable period of time, taking into account economic, environmental, legal, social, and technological factors. | high | |
| #D023 | INLAND SURFACE WATERS | are all surface waters of the State that do not include the ocean, enclosed bays, or estuaries. | high | |
| #D024 | LOAD ALLOCATION (LA) | is the portion of a receiving water's total maximum daily load that is allocated to one of its nonpoint sources of pollution or to natural background sources. | high | |
| #D025 | LONG-TERM ARITHMETIC MEAN FLOW | is at least two years of flow data used in calculating an arithmetic mean as defined in this appendix. | high | |
| #D026 | MAXIMUM DAILY FLOW | is the maximum flow sample of all samples collected in a calendar day. | high | |
| #D027 | MAXIMUM DAILY EFFLUENT LIMITATION (MDEL) | means 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 | |
| #D028 | MEDIAN | is 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 | |
| #D029 | METHOD DETECTION LIMIT (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 40 CFR 136, Appendix B, revised as of May 14, 1999. | high | |
| #D030 | MINIMUM LEVEL (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 | |
| #D031 | 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 water body. | high | |
| #D032 | MUTAGENIC | pollutants are substances that are known to cause a mutation (i.e., change in a gene or chromosome) in living organisms. | high | |
| #D033 | MUTUAL WATER COMPANY | is defined in the Public Utilities Code, section 2725 as: 'any private corporation or association organized for the purpose of delivering water to its stockholders and members at cost, including use of works for conserving, treating and reclaiming water'. | high | |
| #D034 | NEW DISCHARGER | includes any building, structure, facility, or installation from which there is, or may be, a discharge of pollutants, the construction of which commenced after the effective date of this Policy. | high | |
| #D035 | OBJECTIONABLE BOTTOM DEPOSITS | are an accumulation of materials or substances on or near the bottom of a water body, which creates conditions that adversely impact aquatic life, human health, beneficial uses, or aesthetics. These conditions include, but are not limited to, the accumulation of pollutants in the sediments and other conditions that result in harm to benthic organisms, production of food chain organisms, or fish egg development. The presence of such deposits shall be determined by RWQCB(s) on a case-by-case basis. | high | |
| #D036 | OCEAN WATERS | are 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 SWRCB's California Ocean Plan. | high | |
| #D037 | PERSISTENT | pollutants are substances for which degradation or decomposition in the environment is nonexistent or very slow. | high | |
| #D038 | POLLUTANT MINIMIZATION | 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 | |
| #D039 | 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 SWRCB or RWQCB. | high | |
| #D040 | PROCESS OPTIMIZATION | means minor changes to the existing facility and treatment plant operations that optimize the effectiveness of the existing treatment processes. | high | |
| #D041 | PUBLIC ENTITY | includes the federal government or a state, county, city and county, city, district, public authority, or public agency. | high | |
| #D042 | SOURCE OF DRINKING WATER | is any water designated as municipal or domestic supply (MUN) in a RWQCB basin plan. | high | |
| #D043 | STANDARD DEVIATION ( σ ) | is a measure of variability that is calculated as follows: 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 | |
| #D044 | TERATOGENIC | pollutants are substances that are known to cause structural abnormalities or birth defects in living organisms. | high | |
| #D045 | TOXICITY REDUCTION EVALUATION (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 | |
| #D046 | USE ATTAINABILITY ANALYSIS | is a structured scientific assessment of the factors affecting the attainment of the use which may include physical, chemical, biological and economic factors as described in 40 CFR 131.10(g) (40 CFR 131.3, revised as of July 1, 1997). | high | |
| #D047 | WATER-EFFECT RATIO (WER) | is an appropriate measure of the toxicity of a material obtained in a site water divided by the same measure of the toxicity of the same material obtained simultaneously in a laboratory dilution water. | high | |
| #D048 | 1Q10 | is the lowest flow that occurs for one day with a statistical frequency of once every 10 years. | high | |
| #D049 | 7Q10 | is the average low flow that occurs for seven consecutive days with a statistical frequency of once every 10 years. | high | |
| #D050 | 90 th PERCENTILE OF OBSERVED DATA | is the measurement in the ordered set of data (lowest to highest) where 90 percent of the reported measurements are less than or equal to that value. | high | |
| #D051 | Application Area | Is the area of the treated waterbody to which lanthanum-modified clay is directly applied. | high | |
| #D052 | 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 | |
| #D053 | 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 | |
| #D054 | 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 | |
| #D055 | 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 | |
| #D056 | 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 | |
| #D057 | Not Detected (ND) | Sample results which are less than the laboratory's MDL. | high | |
| #D058 | Persistent Pollutants | Persistent pollutants are substances for which degradation or decomposition in the environment is nonexistent or very slow. | high | |
| #D059 | 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 | |
| #D060 | 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 matrix effects 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 | |
| #D061 | 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 | |
| #D062 | 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 | |
| #D063 | 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: [Formula] where: Σ x is the sum of the measured ambient water concentrations, and n is the number of samples. | high | |
| #D064 | 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 | |
| #D065 | 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 | |
| #D066 | Carcinogenic | Pollutants are substances that are known to cause cancer in living organisms. | high | |
| #D067 | 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 | |
| #D068 | 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 | |
| #D069 | 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 | |
| #D070 | 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 | |
| #D071 | 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 | |
| #D072 | Inland Surface Waters | All surface waters of the State of California (State) that do not include the ocean, enclosed bays, or estuaries. | high | |
| #D073 | 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 | |
| #D074 | 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: [Formula]. If n is even, then: [Formula] (i.e., the midpoint between the (n/2 and ((n/2)+1))). | high | |
| #D075 | 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 | |
| #D076 | 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 | |
| #D077 | 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 | |
| #D078 | 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 | |
| #D079 | Source of Drinking Water | Any water designated as municipal or domestic supply (MUN) in the San Diego Basin Plan. | high | |
| #D080 | Standard Deviation ( σ ) | Standard Deviation is a measure of variability that is calculated as follows: [Formula] where: x is the observed value; µ is the arithmetic mean of the observed values; and n is the number of samples. | high | |
| #D081 | 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 | |
| #D082 | Bypass | 'Bypass' means the intentional diversion of waste streams from any portion of a treatment facility. (40 CFR § 122.41(m)(1)(i).) | high | |
| #D083 | 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. Severe property damage does not mean economic loss caused by delays in production. (40 CFR § 122.41(m)(1)(ii).) | high | |
| #D084 | 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 § 122.41(n)(1).) | high |