| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | administrative | reporting | mandatory | Discharge Registration and EIS Timeline | wastewater | Discharges must be registered in accordance with the MSR and dischargers are advised to undertake a number of pre-registration activities. While it is recommended that an Environmental Impact Study for the discharge and the facility be undertaken as part of the pre-registration activities, note that it must be completed at least 90 days prior to commencement of construction of any facility. | Prior to commencement of construction of any facility. | high |
| #Q002 | administrative | operational | mandatory | EIS Qualified Professional Requirement | wastewater | In several sections of the MSR (see Appendix 1 of this Guideline) an EIS is required to be conducted by a qualified professional with expertise and experience in conducting environmental assessments. | high | |
| #Q003 | reporting | reporting | mandatory | EIS Notification and Retention | wastewater | The EIS must be completed 90 days before construction of any facility commences and the report must be retained for inspection by the Ministry of Environment, Lands and Parks (MELP) Regional Pollution Prevention Manager (Manager). The Manager must be notified when the study is completed. | 90 days before construction of any facility commences. | high |
| #Q004 | monitoring | operational | mandatory | Control Sampling Station Requirement | wastewater, aquatic life | The monitoring program should include several downstream or down-gradient sampling locations and must include at least one control sampling station located upstream, up-gradient, outside the influence of the initial dilution zone (IDZ) of the effluent, or outside the influence of the effluent or any other discharge. | high | |
| #Q005 | treatment | treatment | mandatory | Disinfection Need Determination | wastewater | The EIS must determine if disinfection is needed to meet water quality guidelines. | high | |
| #Q006 | treatment | treatment | mandatory | Disinfection Method Alternative | wastewater | All efforts must be made to use a disinfection method other than chlorination and de-chlorination, particularly if the discharge goes directly to fish-bearing waters. | Particularly applicable to direct discharges to fish-bearing waters. | high |
| #Q007 | monitoring | unknown | mandatory | Toxicity Bioassay Requirement | wastewater | All discharges, except those identified in Section 9 (2) (a), (b), (d) and (f) of the MSR, must comply with the 96 hour LC50 bioassay requirement, unless an EIS demonstrates to the satisfaction of the Manager that the receiving environment will not be adversely affected. | Applies unless an EIS demonstrates receiving environment will not be adversely affected. Exemptions apply as per Section 9 (2) (a), (b), (d) and (f). | high |
| #Q008 | prohibition | health | mandatory | Shellfish Harvesting Area IDZ Setback | wastewater, aquatic life | inventories of receiving water use, noting that the outside boundary of the discharge's IDZ must not be within 300 m of a commercial shellfish lease or known native or recreational shellfish harvesting areas; | high | |
| #Q009 | monitoring | operational | mandatory | Low Dilution Ratio Assessment | wastewater | When the dilution ratio is less than 100:1, the EIS must determine if effluent quality needs to be improved beyond the requirements of schedule 3 of the MSR. | When the dilution ratio is less than 100:1. | high |
| #Q010 | prohibition | health | mandatory | Low Dilution Ratio Discharge Prohibition | wastewater, recreational water, aquatic life | When the dilution ratio is less than 40:1 and the stream is used for recreation, domestic water extraction, seasonal discharge, or the stream contains fish, an effluent discharge is prohibited unless the EIS demonstrates to the Manager there is no unacceptable environmental impact and that there are no other practical solutions. | When dilution ratio is less than 40:1 and stream used for recreation, extraction, seasonal discharge, or contains fish. | high |
| #Q011 | treatment | treatment | mandatory | Small Lake Advanced Treatment | wastewater | For a proposed discharge to a lake having a surface area less than 100 ha, advanced treatment is required as prescribed by Schedule 5 of the MSR, and further, the EIS must determine what degree of advanced treatment, if any, will adequately protect the lake environment. | Discharge to a lake having a surface area less than 100 ha. | high |
| #Q012 | operational | operational | mandatory | Ammonia End of Pipe Calculation | wastewater | For ammonia, an 'end of pipe' back calculation from the edge of the IDZ is required. | high | |
| #Q013 | monitoring | operational | mandatory | Low Percolation Rate Studies | wastewater | if percolation rates are less than 2 minutes per 25 mm, additional hydrogeological studies must be conducted to satisfy Schedule 4, Appendix 1, Note 8 of the MSR; | If percolation rates are less than 2 minutes per 25 mm. | high |
| #Q014 | treatment | treatment | mandatory | Advanced Treatment Requirement by Geography | wastewater | Advanced treatment to meet more stringent effluent quality is required for the geographical areas noted in schedule 5 of the MSR. | Geographical areas noted in schedule 5 of the MSR. | high |
| #Q015 | design | unknown | mandatory | Facility Design Environmental Impact | wastewater | An EIS is required to demonstrate that the sewage facility will not adversely impact the receiving environment or adjacent neighbourhood. | high | |
| #Q016 | monitoring | operational | mandatory | Post-Discharge Monitoring Evaluation | wastewater | Following commencement of the discharge, effluent and receiving environment monitoring results are to be evaluated: to determine whether water quality guidelines are being met outside the IDZ; to confirm that sediment biota, chemistry and toxicity are not adversely affected; and to test previous modeling and predictive assessments are correct. | Following commencement of the discharge. | high |
| #Q017 | administrative | treatment | mandatory | CSO and SSO EIS Requirement | wastewater | An EIS is required to determine water quality requirements and treatment needed to protect the designated uses of the receiving waters at all CSO and SSO locations. | At all Combined Sewer Overflow (CSO) and Sanitary Sewer Overflow (SSO) locations. | high |
| #Q018 | administrative | operational | mandatory | Retention of Qualified Professional | wastewater | Dischargers must retain a qualified professional with expertise and experience in conducting environmental assessments to undertake an EIS. | high | |
| #Q019 | treatment | operational | mandatory | Ground Discharge Nutrient Removal Requirement | wastewater | removal of nutrients that are determined to limit biological activity in the receiving environment (i.e., phosphorus or nitrogen species), unless it can be substantiated that the groundwater table will remain at least 3 m below the surface (or below the drainage trench bottom for sub-surface disposal) and percolation rates are slower than 10 minutes per 25 mm; | When nutrients are determined to limit biological activity, unless specified groundwater table and percolation conditions are met | high |
| #Q020 | administrative | health | mandatory | Reclaimed Water Well Setback EIS Requirement | drinking water, other | irrigation or impoundment of reclaimed water within 30 m of a domestic water well will require an EIS to determine if lesser or greater setbacks may be acceptable to the Manager; | Applicable when irrigation or impoundment occurs within 30m of a domestic water well | high |
| #Q021 | corrective_action | operational | mandatory | Dry Weather Overflow Elimination Requirement | wastewater | determine methods to eliminate dry weather overflows. | Required as part of the EIS for CSO and SSO locations | high |
| #Q022 | prohibition | health | mandatory | IDZ Acute Toxicity Prohibition | aquatic life | no acute toxicity effects will be acceptable within the IDZ | Subject to exemptions provided by Section 9 of the MSR | high |
| #Q023 | administrative | reporting | recommended | EIS Deviation Justification | other | As well justification should be provided to the Manager for any deviations. | When deviating from the guideline or direction provided by the Manager | high |
| #Q024 | corrective_action | operational | recommended | EIS Outcome Mitigation or Withdrawal | other | If the effect is unacceptable, the proposed discharge should be modified to ensure that no adverse effects will occur, or the proposal should be withdrawn. | When the completed EIS determines proposed discharge or use will have unacceptable effects on human health or the environment | high |
| #Q025 | administrative | operational | recommended | Pre-registration Agency Meetings | other | Meetings should be held with the MELP Regional Pollution Prevention Manager and other agencies, as appropriate (e.g., Environment Canada, Department of Fisheries and Oceans, Ministry of Agriculture, Food and Fisheries, Local Health Authority, Municipality, First Nation, etc.). | Well in advance of registration | high |
| #Q026 | monitoring | operational | mandatory | MSR Standards Compliance Verification | wastewater | The EIS must also determine whether the standards and requirements of the MSR for the receiving environment conditions (e.g., minimum dilution requirements for an outfall, minimum subsurface travel time for ground discharges) are met by the proposed discharge. | high | |
| #Q027 | administrative | unknown | mandatory | Alternative Nitrogen Limit Authorization | wastewater | Any alternative to the total nitrogen limit must be authorized by the Manager, based on the EIS findings. | If alternative requirements to the 10 mg/L total nitrogen limit for discharges to ground are necessary | high |
| #Q028 | operational | operational | guidance | Predictive Modeling Tools Requirement | wastewater | The use of predictive modeling tools is normally required. | high | |
| #Q029 | administrative | reporting | guidance | Nondomestic and Semi-solid Waste Impact Assessment | wastewater | With reference to section 20 of the MSR, an EIS may be required to assess the impact of nondomestic waste discharges into a municipal sewage collection system (in the absence of a source control bylaw), and to assess the impact of semi-solid waste discharges to a treatment facility. The impact of these discharges on the final effluent quality and resulting biosolids quality needs to be assessed in these studies. | high | |
| #Q030 | administrative | treatment | guidance | Managerial Discretion for Stringent Standards | wastewater | If the EIS indicates the need for more stringent standards to protect human health or the environment, the Manager may require the discharger to meet more stringent standards, or provide advanced treatment, or meet water quality guidelines or mass loading limits. | When an EIS indicates the need for more stringent standards to protect human health or the environment. | high |
| #Q031 | administrative | health | mandatory | Restricted Public Access Reclaimed Water EIS | recreational water | if remote areas of parks, school grounds during vacation periods, and golf courses are proposed to be included under the restricted public access category, then an EIS must determine to the satisfaction of the Manager whether there will be adverse environmental or health impacts; | When remote areas of parks, school grounds during vacation periods, and golf courses are proposed to be included under restricted public access. | high |
| #Q032 | operational | treatment | recommended | CSO and SSO EIS Assessment Components | wastewater | The EIS should address the following: 1. quantify overflow events based on 5-year return period precipitation; 2. establish receiving water beneficial uses; 3. determine water quality guidelines to protect beneficial uses and aquatic resources at risk; 4. evaluate methods of treatment to achieve the water quality guidelines, but as a minimum, control of floatables and materials of obvious sewage origin; and 5. determine methods to eliminate dry weather overflows. | Required as part of the EIS for all CSO and SSO locations. | high |
| #Q033 | administrative | treatment | guidance | Ground Discharge Nitrogen Limit Alternative Study | wastewater | An additional, more detailed, EIS may be undertaken by the discharger to determine if alternative requirements to the 10 mg/L total nitrogen limit for discharges to ground are necessary. | If alternative requirements to the total nitrogen limit are sought. | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #P001 | design | health | mandatory | Setback from domestic water well (irrigation or impoundment) | other | requirement | 30 m | irrigation or impoundment of reclaimed water within 30 m of a domestic water well will require an EIS to determine if lesser or greater setbacks may be acceptable | irrigation or impoundment of reclaimed water | high |
| #P002 | design | health | mandatory | Setback from commercial shellfish lease | other | requirement | 300 m | the outside boundary of the discharge's IDZ must not be within 300 m of a commercial shellfish lease or known native or recreational shellfish harvesting areas | Discharges to water | high |
| #P003 | physical | treatment | guidance | Low permeability layer hydraulic conductivity | other | unknown | <= 1E-08 m/s | the vertical distance to any low permeability (hydraulic conductivity of 1x10 -8 m/s, or less) layer beneath the disposal area | Discharges to ground | high |
| #P004 | physical | operational | mandatory | Percolation rate for additional hydrogeological studies | other | requirement | < 2 minutes per 25 mm | if percolation rates are less than 2 minutes per 25 mm, additional hydrogeological studies must be conducted | Discharges to ground | high |
| #P005 | design | treatment | mandatory | Groundwater table separation for nutrient removal exemption | other | requirement | >= 3 m | unless it can be substantiated that the groundwater table will remain at least 3 m below the surface (or below the drainage trench bottom for sub-surface disposal) | Discharges to ground, nutrient removal exemption | high |
| #P006 | physical | treatment | mandatory | Percolation rate for nutrient removal exemption | other | requirement | > 10 minutes per 25 mm | unless it can be substantiated that... percolation rates are slower than 10 minutes per 25 mm | Discharges to ground, nutrient removal exemption | high |
| #P007 | chemical | health | mandatory | Total nitrogen limit for discharges to ground | other | MAC | 10 mg/L | alternative requirements to the 10 mg/L total nitrogen limit for discharges to ground | Advanced treatment, discharges to ground | high |
| #P008 | design | health | mandatory | Setback distance to surface water | other | requirement | 30 m | surface water = 30 m | Discharge to Ground Disposal Fields or to Exfiltration Basins | high |
| #P009 | design | health | mandatory | Setback distance to surface water (Okanagan Basin) | other | requirement | 150 m | surface water = 30 m (150 m in Okanagan Basin) | Discharge to Ground Disposal Fields or to Exfiltration Basins in Okanagan Basin | high |
| #P010 | design | health | mandatory | Setback distance to surface drinking water | other | requirement | 300 m | surface drinking water = 300 m | Discharge to Ground Disposal Fields or to Exfiltration Basins | high |
| #P011 | design | health | mandatory | Setback distance to water well | other | requirement | 90 m | water well = 90 m | Discharge to Ground Disposal Fields or to Exfiltration Basins | high |
| #P012 | design | health | mandatory | Setback distance to water well (unconfined aquifer) | other | requirement | 300 m | water well = 90 m (300 m in unconfined aquifer) | Discharge to Ground Disposal Fields or to Exfiltration Basins in unconfined aquifer | high |
| #P013 | chemical | health | mandatory | Toxicity test duration (LC50 bioassay) | other | requirement | 96 hour | All discharges, except those identified in Section 9 (2) (a), (b), (d) and (f) of the MSR, must comply with the 96 hour LC50 bioassay requirement | unless an EIS demonstrates... receiving environment will not be adversely affected | high |
| #P014 | physical | treatment | mandatory | Minimum dilution ratio for toxicity bioassay waiver | other | requirement | 100:1 ratio | if a minimum 100:1 dilution ratio can be achieved within the IDZ and if it can be demonstrated that the receiving environment will not be adversely affected | Circumstance for LC50 bioassay exemption | high |
| #P015 | physical | health | mandatory | Minimum dilution ratio for prohibited discharge threshold | other | requirement | < 40:1 ratio | When the dilution ratio is less than 40:1 and the stream is used for recreation, domestic water extraction, seasonal discharge, or the stream contains fish, an effluent discharge is prohibited | unless the EIS demonstrates there is no unacceptable environmental impact and that there are no other practical solutions | high |
| #P016 | physical | operational | mandatory | Minimum dilution ratio for authorized seasonal discharge | other | requirement | 20:1 ratio | A minimum dilution ratio of 20:1 may be authorized by the Manager for seasonal discharges and where the stream does not contain fish, and is not used for recreation or domestic water extraction | high | |
| #P017 | design | treatment | mandatory | Lake surface area threshold for mandatory advanced treatment | other | requirement | < 100 ha | For a proposed discharge to a lake having a surface area less than 100 ha, advanced treatment is required as prescribed by Schedule 5 of the MSR | high | |
| #P018 | operational | operational | mandatory | Facility commissioning period duration | other | requirement | 3 month | Following construction of a treatment facility, a 3-month long commissioning period is allowed during which the discharge does not have to meet the standards | providing monitoring and studies determine... no adverse environmental impacts | high |
| #P019 | operational | reporting | guidance | Minimum pre-discharge sampling frequency | other | requirement | 5 samples per 30 days | normally, for a discharge to water, pre-discharge weekly sampling for a period of 30 days (i.e., 5 samples collected over a 30 day period) at each station | during the most critical season | high |
| #P020 | design | health | mandatory | Setback distance to domestic water wells (Lower Risk) | other | requirement | 60 m | Confirm that minimum setbacks (i.e., 60 m for domestic wells and 30 m for surface waters for disposal fields) are met | Lower Risk - Maximum Daily Flow <37 m 3 /d with Septic Tank Discharge to Ground | high |
| #P021 | operational | reporting | mandatory | EIS completion timeline | drinking water, wastewater, agricultural water, aquatic life, recreational water | requirement | >= 90 days | EIS... must be completed at least 90 days prior to commencement of construction of any facility. | Prior to commencement of construction | high |
| #P022 | operational | treatment | mandatory | Toxicity bioassay flow threshold | aquatic life | requirement | <= 5000 m3/d | if a discharge is equal to or less than 5000 m 3 /d and if it can be demonstrated that the receiving environment will not be adversely affected | Circumstance for 96 hour LC50 bioassay exemption | high |
| #P023 | design | operational | mandatory | Outfall location modeling threshold | other | requirement | > 5000 m3/d | For flows greater than 5000 m 3 /d, the EIS must determine... the optimum outfall location... in conjunction with computer modeling | Discharges to water | high |
| #P024 | operational | operational | recommended | Environmental assessment team population threshold | other | requirement | > 10000 people | For larger projects (where the contributory population equivalent exceeds 10, 000 people)... a team approach to completing an EIS is recommended. | Contributory population equivalent | high |
| #P025 | operational | reporting | guidance | Well inventory search radius | drinking water | requirement | 300 m | Locate wells in general vicinity (minimum - 300 m radius) of proposed discharge | Lower Risk ground disposal | high |
| #P026 | operational | operational | mandatory | Groundwater mounding calculation return period | other | requirement | 5 year | elevation to which the water table will be raised by the discharge, including mounding calculations... at least equivalent to an event with a 5-year return period | Discharges to ground | high |
| #P027 | operational | reporting | mandatory | Overflow event quantification return period | other | requirement | 5 year | quantify overflow events based on 5-year return period precipitation | Combined Sewer and Sanitary Sewer Overflows | high |
| #P028 | operational | health | mandatory | Down-gradient drinking water well impact assessment radius | drinking water | requirement | 300 m | if a drinking water well is within 300 m down-gradient, the potential effect of nitrogen, pathogens, and other contaminants on that well | Discharges to ground impact assessment | high |
| #P029 | design | health | mandatory | Setback distance to surface water (Lower Risk) | other | requirement | 30 m | Confirm that minimum setbacks (i.e., 60 m for domestic wells and 30 m for surface waters for disposal fields) are met | Lower Risk - Maximum Daily Flow <37 m3/d with Septic Tank Discharge to Ground | high |
| #P030 | operational | health | mandatory | Effluent surfacing distance threshold | other | requirement | 30 m | assess sub-surface travel time and whether the discharge will surface within 30 m of the outer edge of the disposal field area or exfiltration basin | Discharge to Ground Disposal Fields or to Exfiltration Basins | high |
| #P031 | operational | treatment | mandatory | Effluent quality improvement assessment dilution threshold | other | requirement | < 100:1 ratio | When the dilution ratio is less than 100:1, the EIS must determine if effluent quality needs to be improved beyond the requirements of schedule 3 | Discharges to water | high |
| #P032 | design | operational | guideline | Lower Risk flow threshold (Marine/Streams) | other | requirement | < 50 m3/d | Lower Risk - e.g., Maximum Daily Flow <50 m3/d with discharge to Open Marine Water or to Streams with Dilution Ratio >100:1 | Determines limited scope EIS applicability | high |
| #P033 | design | operational | guideline | Greater Risk flow threshold (Marine/Streams) | other | requirement | > 10000 m3/d | Greater Risk - e.g., Maximum Daily Flow >10,000 m3/d with Discharge to Open Marine Waters or to Streams with <100:1 dilution | Determines expanded scope EIS applicability | high |
| #P034 | design | operational | guideline | Lower Risk flow threshold (Ground) | other | requirement | < 37 m3/d | Lower Risk - e.g., Maximum Daily Flow <37 m3/d with Septic Tank Discharge to Ground Disposal Fields | Determines limited scope EIS applicability | high |
| #P035 | design | operational | guideline | Greater Risk flow threshold (Ground) | other | requirement | > 200 m3/d | Greater Risk - e.g., Maximum Daily Flow >200 m3/d with Discharge to Ground Disposal Fields or to Exfiltration Basins | Determines expanded scope EIS applicability | high |
| #P036 | chemical | health | guideline | Elk River Allowable Receiving Water Ammonia Concentration | aquatic life | requirement | 0.461 mg/L | At edge of initial dilution zone, 30-day chronic NH3 concentration | Critical Temp 10 C, Critical pH 8.4 | high |
| #P037 | chemical | treatment | guideline | Elk River Allowable Maximum Effluent Ammonia Concentration | aquatic life | requirement | 9.22 mg/L | Assuming 20:1 dilution within initial dilution zone and negligible background ammonia concentrations | Critical Temp 10 C, Critical pH 8.4 | high |
| #P038 | chemical | health | guideline | Fraser River Allowable Receiving Water Ammonia Concentration | aquatic life | requirement | 0.651 mg/L | At edge of initial dilution zone, 30-day chronic NH3 concentration | Critical Temp 16 C, Critical pH 8.2 | high |
| #P039 | chemical | treatment | guideline | Fraser River Allowable Maximum Effluent Ammonia Concentration | aquatic life | requirement | 13.02 mg/L | Assuming 20:1 dilution within initial dilution zone and negligible background ammonia concentrations | Critical Temp 16 C, Critical pH 8.2 | high |
| #P040 | chemical | health | guideline | Similkameen River Allowable Receiving Water Ammonia Concentration | aquatic life | requirement | 0.606 mg/L | At edge of initial dilution zone, 30-day chronic NH3 concentration | Critical Temp 17 C, Critical pH 8.2 | high |
| #P041 | chemical | treatment | guideline | Similkameen River Allowable Maximum Effluent Ammonia Concentration | aquatic life | requirement | 12.12 mg/L | Assuming 20:1 dilution within initial dilution zone and negligible background ammonia concentrations | Critical Temp 17 C, Critical pH 8.2 | high |
| #P042 | chemical | health | guideline | Skeena River Allowable Receiving Water Ammonia Concentration | aquatic life | requirement | 0.874 mg/L | At edge of initial dilution zone, 30-day chronic NH3 concentration | Critical Temp 15 C, Critical pH 8.1 | high |
| #P043 | chemical | treatment | guideline | Skeena River Allowable Maximum Effluent Ammonia Concentration | aquatic life | requirement | 17.48 mg/L | Assuming 20:1 dilution within initial dilution zone and negligible background ammonia concentrations | Critical Temp 15 C, Critical pH 8.1 | high |
| #P044 | design | operational | guideline | Maximum Mixing Zone Width | other | requirement | 25 percent of stream width | The mixing zone is 12.5 percent of either side of the stream centreline, or 25 percent of the stream width | high | |
| #P045 | operational | operational | guidance | Current meter reading duration | other | requirement | 1 month | conduct one month of current meter readings (at bottom, and at stratification level) | Greater Risk marine discharges, Stage 2 EIS | high |
| #P046 | operational | reporting | guidance | Topographical map scale | other | requirement | <= 50000 scale denominator | Locate on a marine chart or topographical map (1:50,000 or larger scale) | Lower Risk EIS mapping | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | water quality guidelines | a broad term used in the MSR to define water quality guidelines (formerly criteria), water quality objectives, where established for a particular water body, and any other water quality standard approved by the Minister. | high | |
| #D002 | Maximum Infiltration Capacity | The maximum rate (usually expressed in m 3 /day) that wastewater can pass from a pond or seepage trench into natural ground. | high | |
| #D003 | Natural Discharge Capacity | The maximum groundwater flow rate (usually expressed in m 3 /day), in natural ground, from a wastewater discharge facility. | high | |
| #D004 | IDZ | Initial Dilution Zone | high | |
| #D005 | MELP | Ministry of Environment, Lands and Parks | high | |
| #D006 | MSR | Municipal Sewage Regulation | high | |
| #D007 | EIS | environmental impact study | high | |
| #D008 | Manager | Ministry of Environment, Lands and Parks (MELP) Regional Pollution Prevention Manager | high | |
| #D009 | QC | Quality Control | high | |
| #D010 | QA | Quality Assurance | high | |
| #D011 | CTD | conductivity/temperature/depth | high | |
| #D012 | TAR | Technical Assessment Report | high | |
| #D013 | CSO | Combined Sewer Overflow | high | |
| #D014 | SSO | Sanitary Sewer Overflow | high | |
| #D015 | regulatory mixing zone | initial dilution zone | high | |
| #D016 | RSB | initial dilution model | high | |
| #D017 | UM | initial dilution model | high | |
| #D018 | PLUMES | model interface and manager for RSB and UM with two far field algorithms and CORMIX flow categorization scheme | high |