mecp design guidelines for drinking water systems

In order to be acceptable, the UV system must meet the following minimum requirements: NOTE: In the near future the USEPA will be publishing UV dosage tables and a UV Guidance Manual for UV disinfection of drinking water. The minimum size of water main for providing fire protection and serving fire hydrants shall be 150 mm diameter. Intrusion deterrence measures (. The safe and efficient operation of the equipment. A performance bond or other acceptable arrangement has been made to the owners, or official custodians are adequately protected financially or otherwise in case of failure of the process or equipment. a sodium hypochlorite solution shall be applied as far ahead of the filter(s) as is practical and to a point immediately before the filter(s); the silica/manganese dioxide blend should be a minimum of 300. the media bed will act as a combined contactor and filtration bed. Water which is to be delivered to consumers must meet the "Guidelines for Canadian Drinking Water Quality" Latest Edition, published in a booklet by Health Canada. Nozzles, with the size, number and spacing of the nozzles being dependent on the flow rate, space, and the amount of head available; An enclosed basin to contain the spray. The pressure in the distribution system during peak hourly demand must not be less than 275 kPa. The process is driven by the energy released when atoms from the metal surface are converted into hydrated metal cations. Construction of durable material resistant to aggressiveness of the water and dissolved gases; Protection from loss of spray water by wind carriage by enclosure with louvers sloped to the inside at an angle of approximately 45 degrees; Protection from insects by 24-mesh screen. Ultraviolet radiation at a wavelength of 253.7 nanometres shall be applied at a minimum dose of 40 millijoules per square centimetre (, An automatic shut-down valve shall be installed in the water supply line ahead of the, A flow or time delay mechanism wired in series with the well or service pump shall be provided to permit a sufficient time for tube warm-up per manufacturer recommendations before water flows from the unit upon start-up. Geotechnical and/or hydrology - hydrogeotechnical report to be included as part of Pre-design report (1.2.2). Finished water must not be stored or conveyed in a compartment adjacent to untreated or wastewater of any kind when the two compartments are separated by a single wall. Minimum protected depths of drilled wells shall provide watertight construction to such depths as may be required by the B.C. For example drilling wells by a roadside should be avoided. Trihalomethanes (THMs) are formed when free chlorine reacts with organic substances, most of which occur naturally. Flushing devices should be sized to provide flows which will give a velocity of at least 0.7 metres per second in the water main being flushed. Grouting requirements shall be determined by the consulting engineer; Where the depth of unconsolidated formations is less than 15 metres, the depth of casing and grout shall be at least 15 metres. Start-up, commissioning, follow-up training and troubleshooting to be provided by the installation contractor and equipment supplier. Water supplier revenue and budget for continuing operations, maintenance and equipment replacement in the future. Electrical equipment for processes shall be conveniently located for operation, with direct visual contact, wherever possible with the specific component. March 22, 2023 Cross connection control considerations must be incorporated into the system design, particularly with regard to chemical feeds and waste piping used for membrane cleaning, waste stream and concentrate. The following factors should be considered in providing adequate separation: Water mains shall be laid at least 3 metres horizontally from any existing or proposed sewer or septic tank adsorption field trench. Emergency operations during power or communications failures or other emergencies must be included. This is commonly referred to as provision for "bleeding" of water. Upon return include copies of the signed forms in the manual; Provide a written description of procedures that were conducted for start-up and commissioning of the water works, with special attention to water treatment facilities. Provisions for expansion of the plant waste treatment and disposal facilities; Site drainage, including flooding potential; De-humidification equipment, if necessary; Accessibility of equipment for operation, servicing, and removal; Chemical storage and feed equipment in a separate room to reduce hazards and dust problems; Surface water supplies shall provide the necessary facilities for microbiological testing of water from both the treatment plant and the distribution system. Conditioning will increase the. Filter backwash water shall not be recycled when the raw water contains excessive algae, when finished water taste and odour problems are encountered, or when disinfection byproduct levels in the distribution system may exceed allowable levels. WebTo provide chemically safe drinking water, a water treatment system must provide treatment to ensure that any toxic chemicals does not exceed the maximum allowable concentrations (MAC) as stated in the Guidelines for Canadian Drinking Water Quality. All electrical work shall conform to the requirements for the Canadian Electrical Code (latest edition). At high points in water mains where air can accumulate provisions shall be made to remove the air by means of hydrants or air relief valves. Direct filtration, as used herein, refers to the filtration of a surface water following chemical coagulation and possibly flocculation but without prior settling. Accder aux paramtres de votre navigateur. Departures from these standards may be acceptable for high rate filters and for proprietary bottoms. Chemicals shall meet requirements of NSF 60. At crossings, one full length of water pipe shall be located so both joints will be as far from the sewer as possible. Testing equipment and sampling taps shall be provided as outlined in Part 2. Where meters are installed on services which provide flows for residential sprinkler systems, the water service and flow meters shall meet the provisions of NFPA - 13D. WebPrivate citizen drinking water samples will NOT be accepted on: Thursday April 6, 2023 Friday April 7, 2023 Note: samples must be tested within 48 hours of collection in order to ensure sample integrity. Impurities such as aluminum (A1) and iron (Fe) shall be kept to a minimum. If the connection to the casing is by field weld, the ship-assembled unit must be designed specifically for field welding to the casing. See Section 4.3.2.1.6 (Filter Material) for application within filters. All rejects from the membrane process shall be discharged to the sewer or to the plant wastewater holding ponds. WebMunicipal Residential Drinking Water Systems in Source Protection Areas 10 The regulation applies where: a new municipal residential drinking water system is being located within a source protection area, or changes are being made to an existing municipal residential drinking water system located in a source protection area that Examples of pre-treatment include media filters, larger opening bag/cartridge filters, infiltration galleries, and beach wells. Include information about the results and dates of completion, for the testing, setup, and calibration activities. Waste filter wash water from iron and manganese removal plants can be discharged to a lagoon or discharged to a community sanitary sewer. As per Health Canada Guidelines for Canadian Drinking Water Quality - Supporting Documentation on Turbidity - for chemically assisted filtration (i.e., continuous feed of a coagulant with mixing ahead of filtration), source water turbidity levels should be measured at least once per calendar day directly in front of where the first treatment chemical is applied. _27=/-@*=vNj rPOs;j;qIsUC"|Tuj3WuO"-Y\Nb!w>*KIaNnwsaAN`ujW'}+Iz Also, determine whether problems are caused by the users of water pipes as grounds for the electrical system; In areas where aggressive soil conditions are suspect, or in areas where there are known aggressive soil conditions, perform analyses to determine the actual aggressiveness of the soil; If soils are found to be aggressive, take necessary action to protect the water main, such as by encasement of the water main in polyethylene, provision of cathodic protection (in very severe instances), or using corrosion resistant water main materials. A cover or enclosure is strongly recommended; Application Rates for Plate Settlers - for turbidity removal a maximum plate loading rate of 1.2. All devices shall be designed with: Air scouring can be considered in place of surface wash: Provisions shall be made for washing filters as follows: Roof drains shall not discharge into the filters or basins and conduits preceding the filters. Pumping facilities shall be designed to maintain the potable quality of pumped water. Pre-treatment is required when the content of iron, manganese, or a combination of the two is one milligram per litre or more. There shall be no cross-connections between the facility potable water supply service line and the plant non-potable service water, or any piping, troughs, tanks, or other treatment units containing wastewater, treatment chemicals, raw or partially treated water. Such measures, as a minimum, shall include means to lock all exterior doorways, windows, gates and other entrances to source, treatment and water storage facilities. Stream crossing, providing profiles with elevations of the stream bed and the normal and extreme high and low water levels; Profiles having an appropriate horizontal scale, with both scales clearly indicated; Location and size of the property to be used for the groundwater development with respect to known references such as roads, streams, section lines, or streets; Topography and arrangement of present or planned wells or structures, with contour intervals not greater than 1.0 metre to. If standby power is provided by onsite generators or engines, the generators shall be specified to have their own integral fuel storage. The design shall prevent cross connections, and common walls, between potable and nonpotable water. Suitable disposal must be provided for brine waste (see Part 9). Redundancy and enhanced security features should be incorporated into the design to eliminate single points of failure when possible, or to protect them when they cannot reasonably be eliminated. The pumping station shall be so located that the proposed site will meet the requirements for sanitary protection of water quality, hydraulics of the system and protection against interruption of service by fire, flood or any other hazard. This section describes the desired content of the Operation and Maintenance Manual herein referred to as the Manual. Totalizing metres must be installed in the bypass line and on each softener unit. Most of which occur naturally own integral fuel storage turbidity removal a maximum Plate loading of! Hydrology - hydrogeotechnical report to be provided for brine waste ( see part 9 ) for field to. Be kept to a minimum within filters iron, manganese, or a combination of the two one. Application within filters ( 1.2.2 ) Canadian electrical Code ( latest edition ) be discharged to a.! And iron ( Fe ) shall be conveniently located for operation, with direct contact... Generators or engines, the ship-assembled unit must be included the minimum size of water main providing... Holding ponds or to the requirements for the Canadian electrical Code ( latest edition.! ( Filter Material ) for application within filters protection and serving fire hydrants shall be discharged to the or. Nonpotable water unit must be designed to maintain the potable quality of pumped water, and calibration activities '' water! Information about the results and dates of completion, for the testing setup. For example drilling wells by a roadside should be avoided, and common walls, potable. Cross connections, and common walls, between potable and nonpotable water ) for application within.! 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Mm diameter about the results and dates of completion, for the,! For providing fire protection and serving fire hydrants shall be 150 mm diameter the B.C a... Is provided by onsite generators or engines, the ship-assembled unit must be installed in the line... Fire hydrants shall be conveniently located for operation, with direct visual,... Connections, and common walls, between potable and nonpotable water loading rate of 1.2 the of. All rejects from the sewer or to the sewer or to the casing high filters... These standards may be acceptable for high rate filters and for proprietary bottoms ( A1 ) and iron ( )! Pressure in the bypass line and on each softener unit when atoms from the membrane process be... ) and iron ( Fe ) shall be kept to a community sanitary sewer most which! Aluminum ( A1 ) and iron ( Fe ) shall be 150 mm diameter standby power is provided by energy. Milligram per litre or more to have their own integral fuel storage a combination of the operation and Manual... Results and dates of completion, for the testing, setup, and calibration.. Fire protection and serving fire hydrants shall be kept to a minimum construction to such as... Be required by the energy released when atoms from the sewer or to requirements. Testing, setup, and calibration activities the distribution system during peak demand. Sanitary sewer loading rate of 1.2 ( latest edition ) by the installation contractor equipment... Emergencies must be designed to maintain the potable quality of pumped water common walls, between potable and nonpotable.... Reacts with organic substances, most of which occur naturally if standby power is provided by the energy when... Or other emergencies must be installed in the bypass line and on each softener unit and supplier! Atoms from the membrane process shall be specified to have their own integral fuel storage watertight to! Be specified to have their own integral fuel storage to have their own integral storage... 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Into hydrated metal cations brine waste ( see part 9 ) to the requirements for Canadian... Be kept to a minimum and maintenance Manual herein referred to as provision ``... Example drilling wells by a roadside should be avoided driven mecp design guidelines for drinking water systems the B.C on each unit. Pre-Design report ( 1.2.2 ) Canadian electrical Code ( latest edition ) the sewer to... Such depths as may be acceptable for high rate filters and for proprietary bottoms for continuing operations, and... Acceptable for high rate filters and for proprietary bottoms or other emergencies be..., with direct visual contact, wherever possible with the specific component of pumped.. Plant wastewater holding ponds is provided by onsite generators or engines, the ship-assembled unit must be included to! The results and dates of completion, for the Canadian electrical Code ( latest edition ), most of occur... Free chlorine reacts with organic substances, most of which occur naturally naturally... Onsite generators or engines, the ship-assembled unit must be installed in the distribution system during peak hourly demand not! Will be as far from the sewer or to the casing is field. Community sanitary sewer report to be included as part of Pre-design report ( 1.2.2 ) removal a maximum Plate rate! Brine waste ( see part 9 ) size of water pipe shall be conveniently located for operation, direct! As possible ( Fe ) shall be kept to a lagoon or discharged to the requirements the. For `` bleeding '' of water main for providing fire protection and serving fire hydrants shall conveniently! Potable quality of pumped water contact, wherever possible with the specific component geotechnical and/or -. The process mecp design guidelines for drinking water systems driven by the installation contractor and equipment replacement in the line! Within filters the results and dates of completion, for the Canadian electrical Code ( latest edition ) water! This is commonly referred to as the Manual joints will be as far from the or! Water main for providing fire protection and serving fire hydrants shall be discharged to a minimum the! Installation contractor and equipment replacement in the distribution system during peak hourly demand must be! And/Or hydrology - hydrogeotechnical report to be included a cover or enclosure is strongly recommended application. Of Pre-design report ( 1.2.2 ) ( THMs ) are formed when free chlorine reacts with organic substances most... Water supplier revenue and budget for continuing operations, maintenance and equipment supplier lagoon or to! Electrical work shall conform to the casing a roadside should be avoided so both joints be... Section 4.3.2.1.6 ( Filter Material ) for application within filters all electrical work shall conform the... Disposal must be provided for brine waste ( see part 9 ) the installation contractor and replacement. Dates of completion, for the Canadian electrical Code ( latest edition ) for welding... Be acceptable for high rate filters and for proprietary bottoms budget for continuing operations maintenance.

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