Elevated to a minimum of 0.9 metre above the 200-year flood elevation, or 0.9 metre above the highest recorded flood elevation, whichever is higher, or protected to such elevations; Readily accessible at all times unless permitted to be out of service for the period of inaccessibility; Graded around the station so as to lead surface drainage away from the station; Protected to prevent vandalism and entrance by animals or unauthorized persons. A sufficient amount of appropriately selected spill absorbent shall be stored on-site; reusable hypochlorite storage containers shall be reserved for use with hypochlorite only and shall not be rinsed out or otherwise exposed to internal contamination; Special attention shall be given to mounting electrical panels in the hypochlorite room with due consideration being given to sealing, purging and selection of materials. However, if high levels of chlorides exist in the raw water the exchange capacity of the resin should be reduced to account for the chlorides. Fire flows required or recommended in the service area; Fire flows which will be made available by the proposed or enlarged system; Water pressures at representative locations in the distribution system during simultaneous fire flow and maximum day demand conditions; An evaluation of fire protection options including use of residential fire sprinklers; Hydraulic analyses based on flow demands and pressure requirements. It may be necessary to provide pre-treatment. Operation costs shall include an estimate for heat (fuel) and electricity; Operation and maintenance of wastewater disposal systems from water treatment processes; Laboratory procedures; daily, weekly, monthly and annual testing; The estimated normal useful life of new assets and their major components be established and recorded so that there is a clear understanding and record of the expected timing and nature of major repairs, overhauls and replacements; Provincial and/or federal Permits if required. Disinfection is mandatory and will ideally include two distinct stages, a primary stage using pH UV irradiation to inactivate or destroy bacteria, protozoa and some viruses and a secondary stage using chlorine to complete the destruction of potential pathogens and maintain a working residual in the distribution system. WebQuality Standards Regulation O. Reg. Approval from the appropriate regulatory agencies of the safety features for stability and spillway design; A permit from the appropriate regulatory agency for controlling stream flow or installing a structure on the bed of a fish bearing stream or navigable river. For smaller systems, the team should consider recommending assumption of. Some membrane materials are incompatible with certain oxidants. Silica gel resins should not be used for water having a pH above 8.4 or containing less than six milligrams per litre of silica and should not be used when iron is present. Where approved, PVC casing, as a minimum: 3.2.4.7Other Nonferrous Casing Materials. Where permitted for other types of services, booster pumps shall be designed in accordance with Section 6.4. Alum chemical coagulation and sedimentation with preoxidation as necessary. Persons designing and equipping laboratory facilities shall confer with the reviewing authority before beginning the preparation of plans or the purchase of equipment. 3.2.4.1Upper Terminal Well Construction. The final water depth should be 1.5 to 2. sampling taps for raw and filtered water, and also for settled water where coagulation pre-treatment is provided; flow metre with rate-of-flow indicator, totalizer, and a signal suitable for input to an electronic recording device; filter level site gauges which indicate filter head loss (for use during normal operation) and level of water in the sand (for use in back-filling and draining operations); a continuous monitoring turbidimeter on the filter effluent, with a means to record results electronically. The optimum well location is to be determined by a professional hydrogeologist. Main switchgear electrical controls shall be located above grade, in areas not subject to flooding or from possible deluge from process piping or equipment. Iron, manganese, or a combination of the two, should not exceed 0.3 mg/L in the water as applied to the ion exchange resin. Schedule for maintenance of equipment and critical parts replacement. Concrete shall be specially treated to resist the corrosive effects of the salt; The storage and regenerating area shall be designed to facilitate the ease of handling and dumping salt into the brine tanks; If possible electrical panels should be mounted outside of the sodium chloride room; Storage and handling of both these chemicals may be similar and when used should be stored in a separate room with outside access only; Where feasible viewing windows shall be installed between the chemical room and the central control room or interior walkways; Clear identification of each chemical storage room shall be displayed on each chemical room door; Preferred chemical shipping is by double walled 25. Confirm the number of raw water sources that are available. Design plant site, and building layout and building services to ensure maximum operator safety. endstream endobj startxref Moving the point of chlorination to minimize. Each tank shall have an access manhole, a drain, and control equipment consisting of a pressure gauge, water sight glass, automatic or manual air blow-off, means for adding air, and pressure operated start-stop controls for the pumps. In circumstances where there is a staffing shortage of qualified individuals, 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. Bag and cartridge filters are suitable on small systems and where the water quality permits their use. Les navigateurs dsuets ne disposent pas de caractristiques scuritaires permettant dassurer la scurit de vos renseignements. Reservoirs: At least one of the roof professional hydrogeologist occur naturally the number of raw sources... 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Consideration should be given to variable flow over the life of the facility to ensure adequate mixing during low flow conditions; Mixing - the detention period shall be not more than thirty seconds; Location - The rapid mix and flocculation basin shall be as close together as possible. Be designed with a volume 10 times the total quantity of wash water discharged during any twenty-four hour period; Length four times width, and the width at least three times the depth, as measured at the operating water level; Outlet to be at the end opposite the inlet; A weir overflow device at the outlet end with weir length equal to or greater than depth; Velocity to be dissipated at the inlet end; Subsurface infiltration lagoons may be acceptable if approved by the reviewing authority. Vents for reservoirs: At least one of the vents on steel welded tanks must be located near the centre of the roof. Pre-treatment is strongly recommended. The materials and designs used for treated water storage structures shall provide stability and durability as well as protect the quality of the stored water. Some systems utilize air/water back flush. All electrical work shall conform to the requirements for the Canadian Electrical Code (latest edition). Include a description of automatic plant shut-down controls with alarms and conditions which would trigger shut-downs. Designated vehicle areas such as parking lots and drives should be separated from critical assets with adequate standoff distances to eliminate impacts to these assets from possible explosions of material in vehicles. test wells and groundwater sources which are not in use shall be sealed by such methods as necessary to restore the controlling geological conditions which existed prior to construction or as directed by the appropriate regulatory agency; be sealed to prevent undesirable exchange of water from one aquifer to another; preferably be filled with neat cement grout; have fill materials other than cement grout or concrete, disinfected and free of foreign materials; when filled with cement grout or concrete, these materials shall be applied to the well hole through a pipe, tremie, or bailer. Replacement of anthracite with GAC may be considered as a control measure for geosmin and methyl isoborneol (MIB) taste and odours from algae blooms. Controlling organic contamination is an area of design that requires pilot studies and early consultation with the reviewing authority. Sampling taps should be provided on the brine tank discharge piping. Discharge piping from air relief valves shall not connect directly to any storm drain, storm sewer or sanitary sewer. Chemicals and water contact materials shall be approved by the reviewing authority or meet the appropriate ANSI/AWWA and/or ANSI/NSF Standards. Note: The consulting team must balance the scope of the true groundwater determination, or, the groundwater under direct influence (GWUDI) effective in-situ filtration investigation, against the cost of treatment, the time required to conduct the assessment and the various risks to public health. Therefore it is extremely important that the system not be operated beyond design limitations. If calcium hypochlorite is used then the tablet form is preferred. where: CL is clearance in animals and humans (L/kg bw per day); ln 2 is the natural log of 2; V d is the volume of distribution, which is the theoretical volume of blood in which the amount of a chemical would need to be uniformly distributed to produce the observed blood concentration; and; T is the half-life of a compound.

The operational and maintenance cost of bag and cartridge replacement must be considered when designing a system. Fluoridation chemicals, if used, should be selected according Health Canada's "Community Water Fluoridation in First Nations and Inuit Communities" (1998). 8``9s; eo#4U0d:\0_p& a`nX!hTT.bdzy ?-z()P4# 20~ 0 - Radioactive materials include, but are not limited to, granulated activated carbon (GAC) used for radon removal; ion-exchange regeneration waste from radium removal; and manganese greensand backwash solids from manganese removal systems, and reverse osmosis concentrates where radiological constituents are present. Standby power may be required by the reviewing authority so that water may be treated and/or pumped to the distribution system during power outages to meet the average day demand. Trihalomethanes (THMs) are formed when free chlorine reacts with organic substances, most of which occur naturally. 4.3.4.1.7. A certified operator must do an on-site check at least once per day to verify proper operation and plant security. without coagulation pre-treatment, the nominal rate may be 0.1 to 0.3. without coagulation pre-treatment the nominal rate may be somewhat higher when demonstrated to the satisfaction of the approving authority; with coagulation pre-treatment the maximum permissible rate of filtration shall be 0.1. at design maximum day demand the time period between scraping should be at least one month during the worst water quality conditions. Typical Well Pumping Station/Chlorine Room and Control Room (New). Where pumps are sealed with potable water and are pumping water of lesser sanitary quality, the seal shall: Pumps, their prime movers and accessories, shall be controlled in such a manner that they will operate at rated capacity without dangerous overload. Discuss the various wastes from the water treatment plant, their volume, proposed treatment and points of discharge.

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