| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | treatment | health | mandatory | Minimum disinfection treatment for ground water | drinking water | all municipal drinking-water systems and regulated non-municipal drinking-water systems that are required to provide a minimum level of treatment must have a treatment process that consists of disinfection as a minimum, if the system obtains water from a raw water supply which is ground water; | System obtains water from a raw water supply which is ground water | high |
| #Q002 | treatment | health | mandatory | Minimum treatment for surface water and GUDI | drinking water | all regulated drinking-water systems that obtain water from a raw water supply which is surface water or ground water under the direct influence of surface water, must provide a minimum level of treatment consisting of chemically assisted filtration and disinfection or other treatment capable of producing water of equal or better quality; | System obtains water from surface water or ground water under the direct influence of surface water | high |
| #Q003 | treatment | health | mandatory | Disinfectant residual in distribution system | drinking water | all drinking water entering a distribution system that has been treated and is otherwise ready for consumption must contain a disinfectant residual that persists throughout the distribution system unless a point of entry treatment approach is used as permitted by the Regulation; | Unless a point of entry treatment approach is used as permitted by the Regulation | high |
| #Q004 | monitoring | treatment | mandatory | Monitoring of treatment effectiveness | drinking water | effectiveness of the provided treatment must be adequately monitored. | high | |
| #Q005 | design | operational | recommended | Design conformance with Ten State Standards | drinking water | The design and construction of both primary and secondary disinfection facilities should normally conform to the criteria set out in the Recommended Standards for Water Works ("Ten State Standards") published by the Great Lakes - Upper Mississippi River Board of State and Provincial Public Health and Environmental Managers | high | |
| #Q006 | administrative | operational | mandatory | Demonstration of design appropriateness | drinking water | a proponent may be required to demonstrate that any submitted design addresses the issues otherwise addressed by a 'Ten State' recommendation. | medium | |
| #Q007 | design | treatment | recommended | Consideration of raw water supply characteristics | drinking water | Design of the treatment processes should consider the characterization, variability and vulnerability of the raw water supply. | high | |
| #Q008 | monitoring | treatment | recommended | Individual assessment of water supplies | drinking water | All water supplies should be individually assessed by measuring relevant water quality parameters and utilizing, where chemical disinfection is used, the CT tables provided to determine the appropriate disinfectant dosage. | high | |
| #Q009 | treatment | health | mandatory | Ground water treatment overall performance | drinking water | Where the drinking-water system obtains water from a raw water supply which is ground water, the treatment process must, as a minimum, consist of disinfection and must be credited with achieving an overall performance that provides, at a minimum 2-log (99%) removal or inactivation of viruses before the water is delivered to the first consumer. | System obtains water from a raw water supply which is ground water | high |
| #Q010 | treatment | health | mandatory | Surface water and GUDI treatment capability | drinking water | Drinking-water systems that obtain water from a raw water supply which is surface water or ground water under the direct influence of surface water must have a treatment process that is capable of producing water of equal or better quality than a combination of well-operated chemically assisted filtration and disinfection processes would provide. | System obtains water from surface water or ground water under the direct influence of surface water | high |
| #Q011 | treatment | health | mandatory | Minimum disinfection contribution to overall treatment | drinking water | At least 0.5-log removal or inactivation of Giardia cysts and 2-log removal or inactivation of viruses must be provided through the disinfection portion of the overall water treatment process. | System obtains water from surface water or GUDI | high |
| #Q012 | treatment | health | mandatory | Treatment via disinfection alone for GUDI | drinking water | Should the approving Director concur that it is acceptable that the required treatment is achieved through disinfection alone, the disinfection process or combination of disinfection processes used in these circumstances must be capable of providing an effective inactivation of oocysts, cysts, and viruses. | If the approving Director concurs that disinfection alone is acceptable for GUDI | high |
| #Q013 | treatment | health | mandatory | Completion of primary disinfection | drinking water | The entire process of primary disinfection must be completed within the water treatment component of the system, which may include a dedicated part of the piping upstream of the first consumer connection. | high | |
| #Q014 | treatment | health | mandatory | Primary disinfection in point of entry treatment units | drinking water | Where point of entry treatment units are permitted by the Regulation, primary disinfection must be completed within the point of entry treatment unit. | When point of entry treatment units are used | high |
| #Q015 | design | treatment | mandatory | Balancing pathogen inactivation and disinfection by-products | drinking water | Process selection decisions must consider and balance the need to inactivate human pathogens while minimizing the production of disinfection by-products. | high | |
| #Q016 | administrative | reporting | mandatory | Rationale for chemical disinfectants other than free chlorine | drinking water | Where primary chemical disinfectants other than free chlorine are selected, the suitability and effectiveness of these processes must be established on a site-specific basis and the rationale for the selection should be documented by the designer of the drinking-water system or the professional engineer who is responsible for preparing a report on the system. | When primary chemical disinfectants other than free chlorine are selected | high |
| #Q017 | design | treatment | recommended | Determination of actual T10 values | drinking water | Actual T10 values can be significantly different from calculated hydraulic detention times (T) and should be determined by a tracer study, mathematical modeling or by calculations using typical baffle conditions. | high | |
| #Q018 | monitoring | treatment | recommended | CT value continuous measurement basis | drinking water | Calculations should be based on the disinfectant residual concentration as continuously measured at the end of, or at intermediate points within, each process step. | high | |
| #Q019 | operational | treatment | recommended | Maintenance of calculated CT value | drinking water | The calculated CT value should, at all times during plant operation, be equal to or greater than the required overall CT value. | high | |
| #Q020 | monitoring | treatment | mandatory | Validation of non-254 nm continuous UV light sources | drinking water | Where the considered technology uses UV light source providing radiation at wavelengths different from continuous monochromatic 254 nm wavelength light that is close to the maximally effective germicidal wavelengths of 260-265 nm, the dose delivered by the considered technology must be validated also by empirical biodosimetry testing and the dose must be expressed as a 254 nm-equivalent UV dose. | When technology uses wavelengths different from continuous monochromatic 254 nm wavelength light | high |
| #Q021 | design | treatment | recommended | Design considerations for UV facilities | drinking water | UV facilities should be designed taking into account appropriate reliability and redundancy measures, and the light transmission and scale formation/fouling potential in the UV reactor specific to the quality of the raw water supply. | high | |
| #Q022 | treatment | health | mandatory | Secondary disinfection following UV primary disinfection | drinking water | Where the regulation requires the provision of secondary disinfection for a drinking-water system, primary disinfection must be followed by another process, normally chlorination, which introduces and maintains a persistent disinfectant residual throughout the distribution system. | Where secondary disinfection is required and UV is used | high |
| #Q023 | administrative | treatment | mandatory | Demonstration for alternative disinfectants | drinking water | In the case of other disinfectants or a combination of disinfectants other than those discussed in this procedure it must be demonstrated and documented that the disinfection process in conjunction with filtration (where required) achieves the required level of pathogen removal or inactivation. | Use of disinfectants other than those discussed in the procedure | high |
| #Q024 | operational | treatment | mandatory | Conventional filtration operational criteria | drinking water | In order to be considered conventional filtration and meet or exceed the 2.5 log Giardia cyst removal, the 2.0 log Cryptosporidium oocyst removal and 2.0 log virus removal credits, the filtration process must meet the following criteria: use a chemical coagulant at all times when the treatment plant is in operation; monitor and adjust chemical dosages in response to variations in raw water quality; maintain effective backwash procedures, including filter-to-waste or an equivalent procedure during filter ripening to ensure that the effluent turbidity requirements are met at all times; continuously monitor filtrate turbidity from each filter; and, meet the performance criterion for filtered water turbidity of less than or equal to 0.3 NTU in 95% of the measurements each month. | To claim conventional filtration credits | high |
| #Q025 | operational | treatment | mandatory | Slow sand filtration operational criteria | drinking water | In order to meet or exceed the 2.0 log Giardia cyst removal, the 2.0 log Cryptosporidium oocyst removal and 2.0 log virus removal credits, the slow sand filtration process must meet the following criteria: maintain an active biological layer; regularly carry out effective filter cleaning procedures; use filter-to-waste or an equivalent procedure during filter ripening periods; continuously monitor filtrate turbidity from each filter or take a daily grab sample; and, meet the performance criterion for filtered water turbidity of less than or equal to 1.0 NTU in 95% of the measurements each month. | To claim slow sand filtration credits | high |
| #Q026 | operational | treatment | mandatory | Diatomaceous earth filtration operational criteria | drinking water | In order to meet or exceed the 2.0 log Giardia cyst removal, the 2.0 log Cryptosporidium oocyst removal and 1.0 log virus removal credit, the DE filtration process must meet the following criteria: maintain a minimum thickness of pre-coat; maintain effective filter cleaning procedures; maintain full recycle or partial discharge to waste of water flow during filter precoat until the recycle stream turbidity falls to below 1.0 NTU; continuously monitor filtrate turbidity from each filter; and, meet the performance criterion for filtered water turbidity of less than or equal to 1.0 NTU in 95% of the measurements each month. | To claim DE filtration credits | high |
| #Q027 | operational | treatment | mandatory | Cartridge/Bag filtration operational criteria | drinking water | In order to claim the 2.0 log Cryptosporidium oocyst removal credit, the cartridge/bag filtration process must meet the following criteria: use filter elements and housing certified for surrogate particle removal evaluation in accordance with testing procedures and manufacturing quality control specified in ANSI/NSF Standard 53 or equivalent; continuously monitor filtrate turbidity from each filter or take a daily grab sample; and ensure that differential pressures across the filter medium do not exceed manufacturer’s rating and materials coming in contact with water conform to ANSI/NSF Standard 61. | To claim cartridge/bag filter credits | high |
| #Q028 | operational | treatment | mandatory | Membrane filtration operational criteria | drinking water | In order to claim 2.0+ log Cryptosporidium oocyst removal credit, the membrane filtration process must meet the following criteria: maintain effective backwash procedures, including filter-to-waste or an equivalent procedure, to ensure that the effluent turbidity requirements are met at all times; monitor integrity of the membrane by continuous particle counting or equivalently effective means (e.g., intermittent pressure decay measurements); continuously monitor filtrate turbidity; and, meet the performance criterion for filtered water turbidity of less than or equal to 0.1 NTU in 99% of the measurements each month. | To claim membrane filtration credits | high |
| #Q029 | administrative | treatment | mandatory | Demonstration for other filtration technologies | drinking water | In the case of the provision of a filtration technology other than those discussed in this procedure, before using the technology, it must be demonstrated and documented that the filtration technology in conjunction with disinfection achieves the required level of pathogen removal or inactivation. | Use of filtration technologies not discussed in the procedure | high |
| #Q030 | corrective_action | operational | recommended | Corrective action for rapid decay of disinfectant residual | drinking water | Rapid decay of a disinfectant residual may occur as a result of a number of other causes such as heavy encrustation or sediment accumulation and biofilm activity and may require investigation and specific corrective action such as engineered flow velocity increases, and swabbing or pigging/lining and/or main replacement. | When rapid decay of disinfectant residual occurs | high |
| #Q031 | treatment | health | mandatory | Disinfection after construction or repairs | drinking water | All parts of drinking-water systems in contact with drinking water which are taken out of service for inspection, repair or other activities that may lead to contamination before they are put back in service, must be disinfected in accordance with the provisions of the AWWA Standard for Disinfecting Water Mains (C651), AWWA Standard for Disinfection of Water Storage Facilities (C652), AWWA Standard for Disinfection of Water Treatment Plants (C653), and AWWA Standard for Disinfection of Wells (C654) or an equivalent procedure that ensures the safety of drinking water that is delivered to consumers. | Parts taken out of service for inspection, repair, or other activities | high |
| #Q032 | monitoring | treatment | mandatory | Routine monitoring for primary disinfection | drinking water | All systems providing primary disinfection must ensure that routine monitoring of the relevant parameters associated with the performance of the disinfection process is being carried out to ensure that water that is directed to consumers is being properly disinfected. | Systems providing primary disinfection | high |
| #Q033 | monitoring | treatment | mandatory | Continuous monitoring and alarms for municipal residential systems | drinking water | Primary disinfection facilities for all municipal residential drinking-water systems must be equipped with continuous disinfection process monitoring and recording devices with alarms unless otherwise specified in the Regulation. | Municipal residential drinking-water systems | high |
| #Q034 | monitoring | reporting | mandatory | Grab sample testing for non-municipal systems without continuous monitoring | drinking water | Non-municipal systems that do not have continuous monitoring equipment installed must analyze manual grab samples on a daily basis for the parameters specified in the Regulation. | Non-municipal systems without continuous monitoring equipment | high |
| #Q035 | monitoring | treatment | mandatory | Free chlorine residual analyzer continuous sample location | drinking water | Except for situations identified below, the free chlorine residual analyzer(s) installed for the purpose of continuous monitoring of a primary disinfection process utilizing free chlorine residual, must take a continuous sample at the downstream end of the primary disinfection process. | high | |
| #Q036 | monitoring | treatment | mandatory | Free chlorine analyzer location ahead of post-disinfection chemicals | drinking water | In all cases, the location must be ahead of the point of addition of any post-disinfection chemicals, including those intended for the purpose of ensuring maintenance of disinfectant residual in the distribution system or preventing corrosion in the distribution system. | high | |
| #Q037 | operational | treatment | mandatory | Free chlorine analyzer calibration frequency | drinking water | Every free chlorine residual analyzer installed for the purpose of monitoring a primary disinfection process utilizing free chlorine residual, must be calibrated at a frequency necessary to ensure appropriate operation of the analyzer within a quality control band of plus/minus 0.05 mg ⁄ L at a chlorine concentration up to and including 1.0 mg ⁄ L or plus/minus 5.0% at a chlorine concentration greater than 1.0 mg ⁄ L. | high | |
| #Q038 | monitoring | treatment | mandatory | Continuous monitoring of UV parameters and alarms | drinking water | All UV disinfection facilities must continuously monitor such parameters that allow the operator to determine that the target design 254 nm-equivalent UV pass through dose or higher is being delivered, and all systems must provide annunciated failure alarms when this design dose is not being delivered. | UV disinfection facilities | high |
| #Q039 | operational | treatment | mandatory | UV sensor calibration frequency | drinking water | All sensors that constitute part of the monitoring system must be calibrated at a frequency that maintains their necessary sensitivity and reliability in ensuring that the design UV dose is being achieved. | UV monitoring sensors | high |
| #Q040 | monitoring | treatment | mandatory | Daily grab sample testing for turbidity if no continuous monitor | drinking water | Systems not required to have continuous monitoring and which choose not to install such equipment must ensure that a water sample is taken at least once a day on each filter effluent line and is tested for turbidity. | Systems not required to have continuous monitoring that do not install it | high |
| #Q041 | operational | treatment | mandatory | Turbidity analyzer calibration frequency | drinking water | Every water turbidity analyzer installed for the purpose of monitoring the effectiveness of the filtration process (usually ahead of the primary disinfection process) must be calibrated at a frequency necessary to ensure the appropriate operation of the analyzer. | high | |
| #Q042 | prohibition | health | recommended | Prohibition of chemical addition upstream of DBP precursor removal | drinking water | Chemical disinfectant addition should not take place upstream of the precursor removal process(s), unless the use of prechlorination can be justified by the raw water source quality including active mussel veliger content, measurement of DBP formation potential, and other site specific conditions. | Unless justified by specific source quality issues | high |
| #Q043 | design | health | mandatory | Priority of pathogen inactivation over DBP minimization | drinking water | Notwithstanding the above, the treatment processes must be designed and always operated to achieve the required removal or inactivation of pathogens as a priority with the minimization of disinfection by products formation as a secondary objective. | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | microbiological | treatment | mandatory | Ground water minimum virus removal | drinking water | treatment_goal | >= 2 log | achieving an overall performance that provides, at a minimum 2-log (99%) removal or inactivation of viruses before the water is delivered to the first consumer | where the drinking-water system obtains water from a raw water supply which is ground water | high |
| #P002 | microbiological | treatment | mandatory | Surface water Cryptosporidium removal | drinking water | treatment_goal | >= 2 log | provides at a minimum a 2-log (99%) removal or inactivation of Cryptosporidium oocysts | obtain water from a raw water supply which is surface water or ground water under the direct influence of surface water | high |
| #P003 | microbiological | treatment | mandatory | Surface water Giardia removal | drinking water | treatment_goal | >= 3 log | a 3-log (99.9%) removal or inactivation of Giardia cysts | obtain water from a raw water supply which is surface water | high |
| #P004 | microbiological | treatment | mandatory | Surface water virus removal | drinking water | treatment_goal | >= 4 log | and a 4-log (99.99%) removal or inactivation of viruses before the water is delivered | obtain water from a raw water supply which is surface water | high |
| #P005 | microbiological | treatment | mandatory | Disinfection minimum Giardia inactivation | drinking water | requirement | >= 0.5 log | At least 0.5-log removal or inactivation of Giardia cysts | provided through the disinfection portion of the overall water treatment process | high |
| #P006 | microbiological | treatment | mandatory | Disinfection minimum virus inactivation | drinking water | requirement | >= 2 log | and 2-log removal or inactivation of viruses must be provided through the disinfection portion | surface water and ground water under direct influence of surface water | high |
| #P007 | design | treatment | mandatory | UV dose for ground water | drinking water | requirement | >= 40 mJ / cm2 | 254 nm-equivalent UV pass through dose of at least 40 mJ / cm2 is maintained | For ground water which is not under the direct influence of surface water | high |
| #P008 | physical | operational | mandatory | Conventional Filtration treated turbidity | drinking water | requirement | <= 0.3 NTU | meet the performance criterion for filtered water turbidity of less than or equal to 0.3 NTU | in 95% of the measurements each month for conventional filtration | high |
| #P009 | chemical | operational | mandatory | Secondary disinfection minimum free chlorine | drinking water | requirement | >= 0.05 mg / L | there is at least a free chlorine residual of 0.05 mg / L | at all times and at all locations within the distribution system, where there is a daily flow | high |
| #P010 | chemical | operational | recommended | Secondary disinfection max free chlorine | drinking water | requirement | <= 4.0 mg / L | The maximum chlorine residual at any time and at any location within the distribution system should not exceed 4.0 mg / L | when measured as free chlorine | high |
| #P011 | chemical | health | mandatory | Acenaphthene Table 1 Agricultural Soil Standard | other | requirement | 0.05 µg / g | Full Depth Background Site Condition Standards for Agricultural or Other Property Use | soil (other than sediment) | high |
| #P012 | chemical | health | mandatory | Acenaphthene Table 1 Ground Water Standard | other | requirement | 4.1 µg / L | Full Depth Background Site Condition Standards for All Types of Property Uses | ground water | high |
| #P013 | design | operational | guidance | Generic Standard Volume Validity Threshold | other | requirement | > 340 m3 | If the contaminated zone has a volume larger than 340m3, generic standards may be non-conservative | source depletion or groundwater transport pathways | high |
| #P014 | physical | operational | guidance | Organic Carbon Content Generic Standard Threshold | other | requirement | < 0.002 foc | If average Organic Carbon content of soil above water table is < 0.002, generic standards may be non-conservative | soil above the water table | high |
| #P015 | physical | operational | guidance | Surface Water Hardness Validity Threshold | aquatic life | requirement | < 70 mg / L | Aquatic protection values for metals may be non-conservative if surface water total hardness is less than 70mg/L as CaCO3 | surface water body affected by property contaminant migration via groundwater | high |
| #P016 | physical | operational | guidance | Surface Water pH Validity Threshold | aquatic life | requirement | < 6.7 pH | Aquatic protection values for metals and pentachlorophenol may be non-conservative if surface water has pH less than 6.7 | surface water body affected by property contaminant migration via groundwater | high |
| #P017 | design | operational | guidance | Generic Standard Source Dimension Threshold | other | requirement | > 13 metres | If the contaminated zone has a source length or width greater than 13 metres then all pathways which employ source depletion or groundwater transport may be affected. | Contaminated zone volume > 340 m3 or dimension > 13 m | high |
| #P018 | physical | operational | guidance | Capillary Fringe Proximity Threshold | other | requirement | < 0.8 metres | If the annual average of the capillary fringe of the water table is < 0.8 metres from the outer edge of the gravel crush of the building foundation, then the 10 × biodegradation factor assumed in the GW2 pathway may be non-conservative. | Measurement from outer edge of building foundation gravel crush | high |
| #P019 | chemical | health | mandatory | Acenaphthylene Table 1 Soil Standard (Agricultural) | other | requirement | 0.093 µg / g | Full Depth Background Site Condition Standards for Agricultural or Other Property Use | Soil (other than sediment) | high |
| #P020 | chemical | health | mandatory | Aldrin Table 1 Ground Water Standard | other | requirement | 0.01 µg / L | Full Depth Background Site Condition Standards for All Types of Property Uses | Ground Water | high |
| #P021 | chemical | health | mandatory | Aldrin Table 1 Sediment Standard | aquatic life | requirement | 0.002 µg / g | Full Depth Background Site Condition Standards for All Types of Property Uses | Sediment | high |
| #P022 | chemical | health | mandatory | Acetone Table 1 Soil Standard (Agricultural/Other) | agricultural water, other | requirement | 0.5 µg / g | Full Depth Background Site Condition Standards for Agricultural or Other Property Use | soil (other than sediment) | high |
| #P023 | chemical | health | mandatory | Acetone Table 1 Soil Standard (Residential/Parkland/Institutional/Industrial/Commercial/Community) | other | requirement | 0.5 µg / g | Full Depth Background Site Condition Standards for Residential/ Parkland/ Institutional/ Industrial/ Commercial/ Community Property Use | soil (other than sediment) | high |
| #P024 | chemical | health | mandatory | Acetone Table 1 Ground Water Standard | drinking water, other | requirement | 2700 µg / L | Full Depth Background Site Condition Standards for All Types of Property Uses | ground water | high |
| #P025 | chemical | health | mandatory | Anthracene Table 1 Soil Standard (Agricultural/Other) | agricultural water, other | requirement | 0.05 µg / g | Full Depth Background Site Condition Standards for Agricultural or Other Property Use | soil (other than sediment) | high |
| #P026 | chemical | health | mandatory | Anthracene Table 1 Soil Standard (Residential/Parkland/Institutional/Industrial/Commercial/Community) | other | requirement | 0.16 µg / g | Full Depth Background Site Condition Standards for Residential/ Parkland/ Institutional/ Industrial/ Commercial/ Community Property Use | soil (other than sediment) | high |
| #P027 | chemical | health | mandatory | Anthracene Table 1 Ground Water Standard | drinking water, other | requirement | 0.1 µg / L | Full Depth Background Site Condition Standards for All Types of Property Uses | ground water | high |
| #P028 | chemical | health | mandatory | Anthracene Table 1 Sediment Standard | aquatic life | requirement | 0.22 µg / g | Full Depth Background Site Condition Standards for All Types of Property Uses | sediment | high |
| #P029 | chemical | health | mandatory | Arsenic Table 1 Soil Standard (Agricultural/Other) | agricultural water, other | requirement | 11 µg / g | Full Depth Background Site Condition Standards for Agricultural or Other Property Use | soil (other than sediment) | high |
| #P030 | chemical | health | mandatory | Arsenic Table 1 Soil Standard (Residential/Parkland/Institutional/Industrial/Commercial/Community) | other | requirement | 18 µg / g | Full Depth Background Site Condition Standards for Residential/ Parkland/ Institutional/ Industrial/ Commercial/ Community Property Use | soil (other than sediment) | high |
| #P031 | chemical | health | mandatory | Arsenic Table 1 Ground Water Standard | drinking water, other | requirement | 13 µg / L | Full Depth Background Site Condition Standards for All Types of Property Uses | ground water | high |
| #P032 | chemical | health | mandatory | Arsenic Table 1 Sediment Standard | aquatic life | requirement | 6 µg / g | Full Depth Background Site Condition Standards for All Types of Property Uses | sediment | high |
| #P033 | chemical | health | mandatory | Acenaphthene Table 1 Residential/Parkland/Industrial Soil Standard | other | requirement | 0.072 µg/g | Full Depth Background Site Condition Standards; Residential/Parkland/Institutional/Industrial/Commercial/Community Property Use | Soil (other than sediment) | high |
| #P034 | chemical | health | mandatory | Acenaphthene Table 2 Agricultural/Residential Soil Standard (Coarse) | other | requirement | 7.9 µg/g | Full Depth Generic Site Condition Standards in a Potable Ground Water Condition; Agricultural or Residential/Parkland/Institutional Property Use | Coarse textured soil | high |
| #P035 | chemical | health | mandatory | Acenaphthene Table 2 Agricultural/Residential Soil Standard (Medium/Fine) | other | requirement | 29 µg/g | Full Depth Generic Site Condition Standards in a Potable Ground Water Condition; Agricultural or Residential/Parkland/Institutional Property Use | Medium and fine textured soils | high |
| #P036 | chemical | health | mandatory | Antimony Table 1 Agricultural/Other Soil Standard | other | requirement | 1 µg/g | Full Depth Background Site Condition Standards; Agricultural or Other Property Use | Soil (other than sediment) | high |
| #P037 | chemical | health | mandatory | Antimony Table 1 Ground Water Standard | other | requirement | 1.5 µg/L | Full Depth Background Site Condition Standards; All Types of Property Uses | Ground water | high |
| #P038 | chemical | health | mandatory | Carbon Tetrachloride Table 2 Ground Water Standard (Coarse) | drinking water | requirement | 0.79 µg/L | Full Depth Generic Site Condition Standards in a Potable Ground Water Condition | Coarse textured soil conditions | high |
| #P039 | chemical | health | mandatory | Carbon Tetrachloride Table 2 Ground Water Standard (Medium/Fine) | drinking water | requirement | 5 µg/L | Full Depth Generic Site Condition Standards in a Potable Ground Water Condition | Medium and fine textured soils | high |
| #P040 | chemical | health | mandatory | Chloride Table 1 Ground Water Standard | other | requirement | 790000 µg/L | Full Depth Background Site Condition Standards; All Types of Property Uses | Ground water | high |
| #P041 | chemical | operational | mandatory | Secondary disinfection minimum chlorine dioxide | drinking water | requirement | >= 0.05 mg / L | there is at least a... chlorine dioxide residual of 0.05 mg / L | at all times and at all locations within the distribution system, where there is a daily flow | high |
| #P042 | chemical | operational | mandatory | Secondary disinfection minimum combined chlorine | drinking water | requirement | >= 0.25 mg / L | where monochloramine is used, a combined chlorine residual of 0.25 mg / L | at all times and at all locations within the distribution system, where there is a daily flow | high |
| #P043 | chemical | health | mandatory | Secondary disinfection maximum chlorine dioxide | drinking water | requirement | <= 0.8 mg / L | should not exceed... 0.8 mg / L when measured as chlorine dioxide | at any time and at any location within the distribution system | high |
| #P044 | chemical | health | mandatory | Secondary disinfection maximum combined chlorine | drinking water | requirement | <= 3.0 mg / L | should not exceed... 3.0 mg / L when measured as combined chlorine | at any time and at any location within the distribution system | high |
| #P045 | physical | operational | mandatory | Membrane filtration treated turbidity | drinking water | requirement | <= 0.1 NTU | meet the performance criterion for filtered water turbidity of less than or equal to 0.1 NTU | in 99% of the measurements each month | high |
| #P046 | physical | operational | mandatory | Slow sand filtration treated turbidity | drinking water | requirement | <= 1.0 NTU | meet the performance criterion for filtered water turbidity of less than or equal to 1.0 NTU | in 95% of the measurements each month | high |
| #P047 | physical | operational | recommended | Cartridge and bag filtration treated turbidity | drinking water | requirement | <= 0.2 NTU | Normally, the filter should meet the performance criterion for filtered water turbidity of less than or equal to 0.2 NTU | in 95% of the measurements each month | high |
| #P048 | design | treatment | mandatory | UV dose for surface water and GUDI | drinking water | requirement | >= 20 mJ / cm2 | two stage primary disinfection process consisting of UV light (UV reactor’s 254 nm-equivalent UV pass through dose of at least 20 mJ / cm2) combined with chemical disinfection | surface water or GUDI where disinfection alone is approved by the Director | high |
| #P049 | operational | reporting | mandatory | Free chlorine residual analyzer calibration limit | drinking water | requirement | 0.05 mg / L | calibrated at a frequency necessary to ensure appropriate operation of the analyzer within a quality control band of plus/minus 0.05 mg / L | at a chlorine concentration up to and including 1.0 mg / L | high |
| #P050 | physical | aesthetic | recommended | Aesthetic turbidity limit after filtration | drinking water | requirement | < 5.0 NTU | For aesthetic reasons, however, it is recommended that turbidity levels be maintained below 5.0 NTU | where turbidity is solely due to oxidation or chemical precipitation downstream of filtration | high |
| #P051 | design | operational | mandatory | GUDI watertight casing depth | drinking water | requirement | >= 6 metres | A drinking-water system that obtains water from a well... that does not have a watertight casing that extends to a depth of at least 6 metres below ground level. | Deeming a system as GUDI (Ground water under direct influence of surface water) | high |
| #P052 | operational | operational | mandatory | GUDI flow rate threshold | drinking water | requirement | 0.58 litres per second | A drinking-water system that is not capable of producing water at a rate greater than 0.58 litres per second and that obtains water from a well, any part of which is within 15 metres of surface water. | Determining GUDI status based on well proximity and flow capacity | high |
| #P053 | chemical | treatment | mandatory | Minimum free chlorine percentage of total chlorine | drinking water | requirement | > 80 % | In this case... the application of chlorine should be such that the resulting free chlorine residual, at the end of the primary disinfection process, comprises more than 80% of the total chlorine residual | Where ammonia and other nitrogenous substances are present in the influent water and secondary disinfection is required | high |
| #P054 | physical | treatment | guideline | General treated water turbidity goal | drinking water | treatment_goal | < 0.1 NTU | Where possible, the filtration system should be designed and operated to reduce turbidity levels as low as possible, with a goal of treated water turbidity of less than 0.1 NTU at all times. | Applicable to all filtration technologies | high |
| #P055 | physical | operational | guideline | Slow sand filtration raw water turbidity limit | drinking water | requirement | < 10 NTU | Generally, the use of a slow sand filtration process is limited to raw water supply sources (or influent water after pretreatment) having turbidity of less than 10 NTU | Design limitation for slow sand filtration | high |
| #P056 | chemical | operational | guideline | Distribution system free chlorine residual target | drinking water | treatment_goal | 0.2 mg / L | The recommended optimum target for free chlorine residual concentration in a water distribution system is 0.2 mg ⁄ L at a pH 8.5 or less. | Secondary disinfection target | high |
| #P057 | chemical | operational | guideline | Distribution system combined chlorine residual target | drinking water | treatment_goal | 1.0 mg / L | The recommended optimum target for combined chlorine residual for systems designed to operate with chloramination is 1.0 mg ⁄ L at all locations within the distribution system | Secondary disinfection target for chloramination systems | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | direct | A point source that discharges pollutants to waters of the United States, such as streams, lakes, or oceans. | high | |
| #D002 | indirect | A facility that discharges pollutants to a publicly owned treatment works (municipal sewage treatment plant). | high | |
| #D003 | LEDs | light emitting diodes | high | |
| #D004 | TTO | Total Toxic Organics | high | |
| #D005 | NAICS | North American Industrial Classification System | high | |
| #D006 | E&EC | Electrical and Electronic Components | high | |
| #D007 | Electronic crystals | crystals made from quartz, ceramics and other materials | high | |
| #D008 | Luminescent materials | materials used as coatings in fluorescent lamps | high | |
| #D009 | Cutting and slicing | Crystals are cut or sliced using diamond blade saws or slurry saws. Water can be used for cooling and lubrication and to carry away removed material. | high | |
| #D010 | Lapping or polishing | Mechanical grinders and chemical etchants are used to remove surface oxides and to provide a smooth surface. Water can be used for cooling and lubrication and to carry away removed material. | high | |
| #D011 | Cleaning, rinsing and degreasing | Removal of etchants, photoresist material, stripping solutions and acid and alkaline solutions from materials after various processing and production steps. | high |