PUBLIC HEALTH ENGINEERING Application for a Water Supply System Construction Permit GUIDELINES AND APPLICATION

Transcription

1 PUBLIC HEALTH ENGINEERING Application for a Water Supply System Construction Permit GUIDELINES AND APPLICATION 1. INTRODUCTION To ensure public health protection regarding drinking water, Section 7 of the Drinking Water Protection Act, requires that a Construction Permit is obtained from the Public Health Engineer before commencing construction, alteration or extension of a water supply system or before a new water source is used. Further, an Operating Permit is required by a purveyor to operate a water supply system. The Public Health Engineer issues the Construction Permit and the Drinking Water Officer issues the Operating Permit. An application for a Construction Permit will be of professional quality, and typically should be prepared by a Professional Engineer registered to practice in British Columbia. The submission should be made at least 30 working days before approval is needed. Completed Applications should be submitted to the Drinking Water Officer for that region: Sea-to-Sky: Sunshine Coast: Powell River: Vancouver/ Richmond: North Shore/ Bowen Island/ Central Coast: Drinking Water Officer, Sea to Sky Region 1140 Hunter Place, PO Box 220, Squamish, B.C., V0N 3G0 Phone: (toll free ), len.clarkson@vch.ca Drinking Water Officer, Sunshine Coast Region PO Box 1040, 5571 Inlet Ave., Sechelt, B.C., V0N 3A0 Phone: , tim.adams@vch.ca Drinking Water Officer, Powell River Region 3rd Floor, 5000 Joyce Ave., Powell River, V8A 5R3 Phone: , dan.glover@vch.ca Drinking Water Officer, Vancouver/Richmond Regions # West Broadway, Vancouver, B.C., V5Z 4C2 Phone: est , julie.lee@vch.ca Drinking Water Officer, North Shore/Bowen Island/Central Coast Region nd Street, West Vancouver, BC, V7V 4C2 Phone: , nader.massoud@vch.ca Submit a completed Application for a Water Supply System Construction Permit (appended to these Guidelines) plus all other pertinent information as per the "SUBMISSION REQUIREMENTS". If the proposed works will become part of an existing Municipal system, include a letter from the Owner that confirms that they will be Rev. October 31, 2008 page 1 of 10

2 assuming ownership of the proposed works. The final Construction Permit will be sent to the Owner of the water system, with copies to the Applicant, Engineer, Developer and Utilities Regulation Section (if a Utility) as applicable. The overall objective is water of a quality that consistently meets a) the Drinking Water Protection Act and Regulations and b) the Guidelines for Canadian Drinking Water Quality from Health Canada, and is of adequate quantity to meet peak demands. 2. SUBMISSION REQUIREMENTS 2.1 General Submit TWO complete sets of construction plans (and specifications when requested) for new sources. Submit ONE complete set of plans for watermain extensions or replacements. All engineered plans are to be signed and sealed by a professional engineer. Photocopies or electronic reproductions of the signature and seal will not be accepted. Include the following: a) a key plan/map to show the location of the proposed waterworks; b) plans that show all proposed supply, transmission, storage, pumping, treatment and distribution works; and c) plans and profiles to show high and low spots in the water system and sanitary and storm sewers that are crossed or are nearby. If there is a new source, water quality details must be included with the application. Details of safeguards will show protection of the watermain where it is nearer than 3m horizontally or has less than 0.5 m clearance vertically (with watermain above) from any sanitary or storm sewer. The publication Design Guidelines for Rural Residential Community Water Systems is available from Water Use Planning and Utilities, Ministry of Environment, PO Box 9340 Stn Prov Govt, Victoria BC V8W 9M1, and can be used as a design guideline. Additional testing or pilot scale studies of treatment processes may be required. Disinfection must not create unacceptable levels of disinfection by-products (trihalomethanes, haloacetic acids, chlorite or bromate). Note: When the proposed waterworks involve new lots or a new strata, the local Environmental Health Officer must approve the onsite sewage system. Where ownership of a water supply system proposed by a Developer will be taken over upon completion by an existing water system Owner, the Construction Permit may be issued in the name of both the Developer and the existing, or ultimate, water system Owner. The Developer (or Applicant) must submit at the time of Application, written confirmation that the existing water system Owner will assume ownership of the Applicant s proposed water supply system. Where there is no regional district, municipality, improvement district etc. to assume ownership of the water supply system, the applicant is directed to the Water Use Planning and Utilities Department, Ministry of Environment, regarding a Certificate of Public Convenience and Necessity (to form a Utility). Under the Water Utility Act, a utility may be required to obtain a Certificate of Public Convenience and Necessity prior to commencement of construction. If the regional district/municipality fails to assume ownership, then the water system will be classified as utility and will also have to receive approval under the Water Utility Act and the Utilities Commission Act. A water utility is defined in the Water Utility Act as a person who owns or operates waterworks that serve five or more connections. 2.2 Groundwater Source For new groundwater sources, submit data on chemical, physical and bacteriological water quality. The raw water must be sampled and analysed for the parameters identified in Section 7 of these Guidelines. Initial samples from groundwater sources should be taken near the conclusion of the pump test, when the water is visually clear of sediment. Rev. October 31, 2008 page 2 of 10

3 The following should be included with the Application: a) Well log, pump test and hydrogeologist's report. The hydrogeologist's report should include an assessment and recommendations on: water quality protection including a description of any risks, confining/protective layers, time of travel radius for existing/suspected point sources of potential well contamination, non-point sources, maximum discharge rates, wellhead protection, and quality and quantity monitoring including parameters and frequency, etc. The report should include any available information on historical use of groundwater in the area and area recharge, should confirm that the well is constructed in accordance with the Groundwater Regulations and the Code of Practice, and should also comment on whether the groundwater source is under the direct influence of surface water; b) Mechanical and instrumentation/control facilities at wellhead, or pumphouse; and c) Proposed treatment and confirmation that the water will have acceptable taste, colour and odour. 2.3 Surface Water Source For new surface water sources, submit data on chemical, physical and bacteriological water quality (see Section 7 of these Guidelines). A surface water source is defined as one being influenced or having the potential of being influenced by surface water conditions. The following should be included with the Application: a) The water license(s) permitting use of the water; b) Mechanical and instrumentation/control facilities at the intake or pumphouse; c) Method of disinfection, and proposed treatment; (The level of treatment and disinfection for surface supplies should ensure a minimum level of inactivation of 99.99% for viruses and bacteria and 99.9% for Giardia and Cryptosporidium cysts.) d) Confirmation that the water will have acceptable taste, colour and odour; and e) A report giving a description of the watershed, noting any existing or potential sources of contamination, which may affect water quality, flood level, safe yield, hydrological data, etc. 2.4 Other Agencies Where applicable, confirm that the water system meets all local government bylaws. If a water utility is involved, confirm that the design incorporates the requirements of the Comptroller of Water Rights, via the Utility Regulation Section, Land and water Management Division, Land and Water British Columbia, Inc., in Victoria. 2.5 Construction Specify who will be responsible for construction inspections and post construction certification of the waterworks to ensure that materials and construction standards meet approved plans and current engineering standards such as American Water Works Association (AWWA). 2.6 Small Water Systems and Rural Residential Systems --- Special Consideration To minimize preparation costs when an application is made for a Construction Permit for a small water system - less than 15 service connections (Health Act Fee Regulation), needed to resolve existing water problems, the procedures outlined above will generally apply. The submission may be modified at the discretion of the Public Health Engineer, as follows: Rev. October 31, 2008 page 3 of 10

4 a) It should be of engineering quality, with an explanatory letter and plans preferably prepared by a Professional Engineer; b) It should include the name and address of the water purveyor or person responsible for the water system operation; c) Document the legal basis for operation - Improvement District, Water Utility under the Water Utility Act, Water Users Community under the Water Act, Strata Corporation, Privately Owned (mobile home parks, campsites), etc.; c) It should contain sufficient general information to assess the proposal; d) Where expansion of an existing waterworks is involved, confirm that quality and quantity of the water for the expanded or improved waterworks will be adequate; and e) It must include recent bacteriological and chemical analysis of the proposed source and, if warranted, contamination protection plans. 3. HEALTH RELATED DESIGN CONSIDERATIONS 3.1 Source Quality The water supply should be obtained from a source that is likely to meet the Drinking Water Protection Act and the Guidelines for Canadian Drinking Water Quality. The source chosen should be one that is least subject to municipal and industrial contamination, and other types of contamination resulting from human activities within the watershed. Every effort should be made to prevent contamination of the source. The waterworks must be protected against access by unauthorized persons. Wells must be located to conform to Section 42 of the Sanitary Regulations pursuant to the Health Act. Well design and development will, in general, follow: a) the AWWA Standard for Deep Wells to ensure contamination does not enter the well; and b) Guidelines for Minimum Standards in Water Well Construction. Water supplies for drinking, culinary, and other domestic uses must be free of pathogenic organisms and their indicators and deleterious chemical substances including radioactive materials. In addition, the water should have acceptable colour, odour and taste. 3.2 Quantities Water supplied must be of sufficient quantity for sanitary purposes. 680 L (150 Imperial gallons) per household per day may be adequate. Water for fire fighting, irrigation, or other purposes, is additional to that required for sanitary purposes. The supply must be adequate to meet reasonable peak demands without development of low pressures that could result in health hazards. For details regarding fire protection requirements, the designer should refer to the most current Fire Underwriters Survey publication entitled Water Supply for Public Fire Protection available from the Insurance Advisory Organization (604) Impounding Reservoirs Any earth storage facility for raw water will be designed to minimize contact between the water and organic materials such as grass, peat, trees, etc. 3.4 Disinfection and Treatment Requirements Some natural purification occurs in surface waters because of dilution, storage, sunlight and associated physical and biological processes. With ground water, natural purification may occur by filtration of the water through soil. Rev. October 31, 2008 page 4 of 10

5 However, effective treatment should be provided whenever necessary to ensure safety and consistency in the quality of all finished waters. Water sources for new waterworks systems or new sources for existing systems using surface water or groundwater under the direct influence of surface water must be disinfected. If necessary, treatment such as coagulation-flocculation, adsorption, sedimentation and filtration may be needed. Deep well sources must be disinfected if deemed necessary by the Drinking Water Officer for reasons of either bacteriological quality or nuisance biological growth or may require other treatment to meet the guidelines. Exceptions to the disinfection and/or other treatment requirements will be considered by the Drinking Water Officer following application from the water purveyor. The application must demonstrate that the source is adequately protected from contamination and that the bacteriological and/or physical and chemical water quality of the source consistently meets the Drinking Water Protection Act and the Guidelines for Canadian Drinking Water Quality (see pages 8 and 9). Exceptions are conditional upon continuance of the requirements noted above and that provision is made for the installation and operation of disinfection and/or other treatment facilities should they be required at a later date. New and Repaired Works The water purveyor is responsible to ensure that facilities and procedures are in place to disinfect all new and repaired tanks reservoirs, watermains, wells, etc. Works are to be disinfected before, use according to AWWA Standards. Maintaining a Chlorine Residual Disinfecting agents commonly used in water treatment are chlorine, chlorine compounds, ultraviolet light and ozone. Other methods of disinfection will be considered if an application provides sufficient evidence to support their use. Free residual chlorination is the method of disinfection most commonly practised. A minimum contact time (T) and minimum level of free chlorine residual (C) is required to produce a CT (product of C and T) of 12 min mg/l. This level of CT will ensure adequate destruction of viruses and bacteria. Inactivation of Giardia lambia cysts requires higher levels of CT. Consideration must be given to ph, ammonia, taste producing substances, temperature, bacteriological quality and other pertinent factors when determining CT. At ph levels above 9, CT has to be increased substantially and this office should be contacted for appropriate levels. Where other methods of disinfection are employed, contact time and residual concentrations must be sufficient to provide adequate disinfection. Water after treatment and disinfection will have a minimum chlorine residual of 0.2 mg/l with an acceptable range of.2mg/l to.4mg/l or a chloramine residual of 1 mg/l (maximum 3.0 mg/l) throughout the distribution system. When there are 15 or more service connections automated chlorine residual sensing and injection will be expected. The capacity of chlorination equipment must be such that an adequate residual can be maintained when maximum flow rates coincide with anticipated maximum chlorine demands. The equipment must be of such design that it will operate accurately over the entire anticipated flow, including low chlorine demand and low flows. If gas chlorine is used, a separate room and operator protection must be provided including forced ventilation from floor level to an approved area. Also required are a viewing window, exterior light and fan switches, chain storage for cylinders, chlorine container repair kit, breathing apparatus, emergency eye wash facilities, chlorine leak monitoring and alarm equipment. Additional guidelines for gas chlorine are available from this office and the WorkSafe BC Offices. If powdered chlorine is used, storage facilities should preclude contact with moisture or organic materials and should be mechanically vented to an approved area. Rev. October 31, 2008 page 5 of 10

6 To ensure reliable, effective and continuous disinfection, additional facilities such as standby equipment, flow pacing, residual monitoring, automated recording and controlling equipment and alarms should be provided. A chlorine test kit (DPD) suitable for measuring both free and total chlorine residual over a range of 0 to 2.0 mg/l, will be available when chlorine is used. Test kits with either a scale or digital readout are far better than those, which rely on visual colour comparison, particularly for measurements below 0.5 mg/l. 3.5 Finished Water Storage Finished water storage will be adequately protected from contamination. Storage structures must have a cover that is watertight, opaque and vermin proof. No drains or overflows are to have a direct connection to a sewer or storm drain. Venting of these structures must not be by open construction between the sidewall and the roof, but by special vent structures that will exclude birds, vermin, and dust. Manholes to these structures must be framed at least 10 cm (4 inches) above the surface of the roof at the opening and the cover must be watertight and extend down around the frame at least 5 cm (2 inches). All openings to the reservoir are to be secured against unauthorized entry. To ensure adequate turnover in the reservoir, water entering must come in at the top, and water leaving the reservoir shall exit from the bottom. An alternative to this is to have an approved recirculation system. Where storage is an integral part of the water system it is recommended that 455 L (100 gallons)/dwelling unit be available for emergency standby. Additional storage may be required for pressure regulation and for fire protection. Steel storage tanks, and paintings and coatings for steel storage tanks, shall comply with the AWWA standards for steel tanks (D100, D102, D103 or D104). Hydropneumatic tanks should be constructed to comply with the B. C. Boiler and Pressure Vessels Code. 3.6 Pumping Stations and Standby Power Pumping facilities must be designed to maintain the sanitary quality of the pumped water. Subsurface pits or pump rooms and inaccessible installations are to be avoided. No pumping station should be subject to flooding. A standby pump should normally be provided. Standby power should be provided at least in situations where a power failure could result in complete pressure loss in any area. 3.7 Transmission and Distribution It is recommended that watermains normally be 10 cm (4 inches) in diameter or greater and be looped. This is to eliminate dead ends and to minimize contamination risks and service disruption when there is a watermain break and during repairs or watermain flushing. Watermain valves should be provided to isolate reasonably sized sections of the system for repair or maintenance or shut-off in the event of watermain breaks. It is recommended that they be placed on property line projections if possible, to make them easier to locate. Flush-outs or hydrants should be provided for flushing purposes on dead-ends and low points. Air relief valves or other facilities designed to provide air relief should be provided at high points. Parallel Runs Watermains are to be laid at least 3 meters (10 feet) horizontally from any sanitary or storm sewer. The watermain must be at least 0.5 m (1.5 feet) above the sewer (measured between the bottom of the watermain and top of the sewer). Where the watermain is less than.5 meters above a storm or sanitary sewer OR 3 meter horizontal separation is not possible the watermain joints are to be wrapped with heat shrink plastic or packed with inert petrolatum compound and wrapped with tape in accordance with ANSI/AWWA Standards C209 and C As an alternative if the vertical separation is not possible, the sewer should be of the same service capability as the watermain, with pressure class joints and gaskets designed to remain Rev. October 31, 2008 page 6 of 10

7 watertight against external hydrostatic pressure should the groundwater table periodically rises above the sewer. The pressure class sewer section should be pressure tested before back-filling. Other precautions, such as a watermain with improved joints and higher strength may be needed. Crossings Where a watermain crosses a sanitary or storm sewer, the lines should be laid with the watermain crossing over the sewer and with the middle of pipe lengths located at the crossing point, to maximise the separation between joints. Where a minimum 3 metre joint separation and/or a minimum.5 meter clear vertical separation is not possible, or if the watermain is below the sewer at the crossing, precautions to improve water tightness of the sewer joints and structural improvements such as higher strength watermain and/or sewer at the crossing area may be needed. Sleeving, pipe bridging or other suitable structural measures may be considered. The bottom portion of manholes, manhole connections to sewers, service connections to sewers and joints in service connections should all be designed to not leak where the normal separation distances are not possible. Sewer crossings should be at the mid-point between watermain joints Newly constructed water systems shall be pressure tested and disinfected in accordance with AWWA standards before use. 3.8 Cross-Connection and Backflow Prevention Careful attention during the design and construction stages will ensure there are no cross connections to contaminated water sources and that the potential for future cross-connections is prevented. Back flow prevention devices are to be installed, especially at services that are likely sources of contamination such as hospitals, service stations, and chemical operations, etc. Cross connection of watermains with any sanitary or storm sewer or other source of non-potable water is prohibited. 4. OPERATING PERMIT An Operating Permit must be obtained from the local Drinking Water Officer to operate a water supply system. Drinking Water Officers in the Coast Garibaldi Health region are: Sea-to-Sky: Sunshine Coast: Powell River: Vancouver/ Richmond: North Shore/ Bowen Island/ Drinking Water Officer, Sea to Sky Region 1140 Hunter Place, PO Box 220, Squamish, B.C., V0N 3G0 Phone: (toll free ), len.clarkson@vch.ca Drinking Water Officer, Sunshine Coast Region PO Box 1040, 5571 Inlet Ave., Sechelt, B.C., V0N 3A0 Phone: , tim.adams@vch.ca Drinking Water Officer, Powell River Region 3rd Floor, 5000 Joyce Ave., Powell River, V8A 5R3 Phone: , dan.glover@vch.ca Drinking Water Officer, Vancouver/Richmond Regions # West Broadway, Vancouver, B.C., V5Z 4C2 Phone: est , julie.lee@vch.ca Drinking Water Officer, North Shore/Bowen Island/Central Coast Region Rev. October 31, 2008 page 7 of 10

8 Central Coast: nd Street, West Vancouver, BC, V7V 4C2 Phone: , Before a Drinking Water Officer issues an Operating Permit the following information is required: a) Confirmation that the drinking water will meet all applicable water quality standards; b) A commitment to carry out a planned water quality-monitoring program for physical, chemical and bacteriological parameters. c) Confirmation that a Construction Permit has been issued for all proposed or recently constructed waterworks; and d) An equipment maintenance manual, operating guidelines and a written Emergency Response Plan as per Section 10 of the Drinking Water Protection Act. The submission may be in draft form for review and comment before finalizing. 5. FURTHER INFORMATION Go to the VCH website ( for more information and copies of the Drinking Water Protection Act and the Drinking Water Protection Regulation, as well as the Guidelines for Canadian Drinking Water Quality. 6. LABORATORIES FOR BACTERIOLOGICAL ANALYSIS (Approved by the Provincial Health Officer) 1. ALS Environmental 1988 Triumph Street Vancouver, B.C. V5L 1K5 Telephone: (604) BCCDC Environmental 655 West 12 th Ave. Vancouver, B.C. V5Z 4R4 Telephone: (604) Cantest Ltd Canada Way Burnaby, B.C. V5G 1K5 Telephone: (604) Caro Environmental Services Suite 102, 677 Highway 97N Kelowna, B.C. V1X 5C3 Telephone: (250) Eco Tech Laboratory Dallas Drive Kamloops, B.C. V2C 6T4 Telephone: (250) GVRD Water Laboratory 4330 Kingsway Vancouver, B.C. V5G 4G8 Telephone: (604) IC Micromed Environmental Clarke Place Richmond, B.C. V6V 2H1 Telephone: (604) Maxxam Analytics Inc Commerce Court Burnaby, B.C. V5A 4N5 Telephone: (604) MB Laboratories Ltd Henry Avenue West Sidney, B.C. V8L 5Y1 Telephone: (250) North Island Laboratories 2755B Moray Avenue Courtenay, B.C. V9N 8M9 Telephone: (250) Northern Laboratories Ltd. 251 Kaien Road Prince Rupert, B.C. V8J 4B7 Telephone: (250) Norwest Labs A Avenue Surrey, B.C. V3S 8P8 Telephone: (604) Rev. October 31, 2008 page 8 of 10

9 7. WATER SOURCE MONITORING APPROVAL OF NEW SOURCES Chemical, Bacteriological and Physical Parameters to be Examined for Water Sources Bacteriological Escherichia Coli (E. Coli) Heterotrophic Plate Count Total Coliforms Iron Bacteria and Sulphur (Reducing) Bacteria (1) Non-Coliform Bacteria Physical/Chemical Alkalinity Conductivity (4) Nitrate Sulphide (7) Ammonia Corrosivity (5) Nitrite Total Dissolved Solids Arsenic (2) Fluoride Nitrogen, organic Total Organic Carbon (8) (9) BTEX (3) Hardness ph Turbidity Chloride Metals Scan (6) Sulphate (7) UV Transmittance (10) Colour Notes: 1) Required for wells. May be required for surface sources if considered appropriate. Test is done on the crusty or slimy material that builds up inside the well casing or on the system piping etc. Contact laboratory for sampling procedure. 2) Arsenic - detection limit = mg/l or better. 3) Required if hydrocarbon/gasoline type contamination is suspected. BTEX stands for Benzene, Toluene, Ethylbenzene and Xylenes. Contact laboratory for sampling procedure. 4) Conductance/Specific Conductance. 5) Calcium Carbonate saturation/langelier's Saturation Index (calculated). 6) Scan to include: Aluminum, Antimony, Barium, Boron, Cadmium, Calcium, Chromium, Copper, Iron, Lead, Magnesium, Manganese, Molybdenum, Nickel, Phosphorus, Potassium, Selenium, Silver, Sodium, Uranium, Zinc (expand scan if mineralised to include Mercury). 7) Sulphate to be sampled for groundwater and surface water; Sulphide as hydrogen sulphide to be sampled for groundwater sources. Analyse on site or preserve sample. Contact laboratory for sampling procedure. 8) If Turbidity is less than 1 NTU, then Dissolved Organic Carbon may be uses as an alternative to Total Organic Carbon 9) If Total Organic Carbon is greater than 2.5 m g/l, analyze for Tannins and Lignins and perform a Trihalomethane Formation Potential Test, if chlorine is as a method of treatment and/or disinfection. Rev. October 31, 2008 page 9 of 10

10 10) Required only if UV disinfection is proposed as part of the water treatment process. The test must be conducted on a RAW, UNFILTERED water sample. (Modified version of Standard Method 5910B (APHA et al. 1998) where the water sample is not filtered or ph adjusted). General Comments 1) Analysis of additional parameters may be required based on the results of the initial analysis and on potential impact by nearby sources of contamination or polluting substances. If industrial pollution, or agricultural or forestry pesticide pollution is suspected, identify what chemicals may have been used and analyse for the most likely indicator parameters. If petroleum pollution is suspected, for example from leaking underground storage tanks, conduct a hydrocarbon scan in addition to BTEX. If parasitic pollution is suspected, Giardia and Crypto analyses may be required. 2) Analyses must be sufficiently accurate so that the minimum detectable concentration is less than 10% of the Guidelines for Canadian Drinking Water Quality, the Drinking Water Protection Act or the Drinking Water Protection Regulation, where applicable. Other analyses must provide sufficient information to reasonably assess the water suitability for drinking purposes and to determine what, if any, treatment might be needed. Analyses must be conducted in accordance with the methods prescribed in Standard Methods for the Examination of Water and Wastewater (latest edition). 3) Analyses should be for Total or closely equivalent concentrations, to represent potential quality problems. Rev. October 31, 2008 page 10 of 10

11 Public Health Engineering FOR OFFICE USE ONLY Date Received: DRAFT NUMBER: NAME OF WATER SYSTEM: Owner: (Municipality, Regional District, or Private Owner, for example) Mailing Address: Contact: Telephone: APPLICANT: (if different than Owner above, for example, the Developer) Company Name: Mailing Address: Contact: Telephone: DRAWINGS PREPARED BY: Company Name: Mailing Address: Contact: Telephone: DRAWING INFORMATION: Drawing Numbers / Sheets: PROPOSED WORKS: (describe the waterworks proposed for construction, including pipe material, length, diameter, pressure rating (class), and details of treatment works etc.) Rev. July 19, 2006 page 1 of 2

12 (continued) Are all plans, reports, specifications and drawings signed, sealed and dated by a Professional Engineer? Does the submission include a new source(s)? Does the water quality of the existing waterworks and/or new source(s) meet the Drinking Water Protection Act and Regulations, and the Guidelines for Canadian Drinking Water Quality? Will treated water provided to the proposed waterworks have a minimum of.2mg/l of free residual chlorine in the distribution system? If not, attach note explaining. Are the watermains a minimum of.5 meter (18 inches) above and clear of sanitary or storm sewers at all crossings? Will all watermains have 3 meter clear separation from storm and sanitary sewers? If not, attach note explaining. Will watermains/reservoirs be disinfected per current AWWA Standard C and Standard C651-92? Do all works not on public right-of-ways have registered easements? Are the lots serviced by a community sewer system? Is this water supply system included in, or a condition of, a preliminary layout approval for subdivision? If the Applicant will not be the eventual Owner of the water supply system, is a letter attached from the eventual Owner indicating that they agree to assume ownership of the waterworks described in this submission? How many new lots/connections will be serviced? Is the capacity of the existing waterworks adequate (including existing and committed servicing)? Have blow-offs or hydrants been provided for flushing purposes on all dead-ends and low points? Have air relief valves, hydrants or services designed to provide air relief been provided at all high points? Additional Information Rev. October 31, 2008 page 2 of 2