Drinking-Water Systems Regulation O. Reg. 170/03

Transcription

1 2011 ANNUAL REPORT Drinking-Water System Number: Drinking-Water System Name: Vars Well System Drinking-Water System Owner: City of Ottawa Drinking-Water System Category: Large Municipal Residential Period being reported: January 1 st December 31 st 2011 Does your Drinking-Water System serve more than 10,000 people? No Is your annual report available to the public at no charge on a web site on the Internet? Yes Location where Summary Report required under O. Reg. 170/03 Schedule 22 will be available for inspection. Britannia Water Purification Plant 2731 Cassels St., Ottawa, Ontario K2B 1A8 (613) Number of Designated Facilities served: Did you provide a copy of your annual report to all Designated Facilities you serve? Number of Interested Authorities you report to: Did you provide a copy of your annual report to all Interested Authorities you report to for each Designated Facility? Note: For the following tables below, additional rows or columns may be added or an appendix may be attached to the report List all Drinking-Water Systems (if any), which receive all of their drinking water from your system: Did you provide a copy of your annual report to all Drinking-Water System owners that are connected to you and to whom you provide all of its drinking water? Page 1 of 6

2 Indicate how you notified system users that your annual report is available, and is free of charge. [ ] Public access/notice via the web [ ] Public access/notice via Government Office [ ] Public access/notice via a newspaper [ ] Public access/notice via Public Request [ ] Public access/notice via a Public Library [ ] Public access/notice via other method Describe your Drinking-Water System The Vars water system draws from either of two wells located approximately 15 meters apart at the treatment facility. Both wellheads are about 0.5 meter above ground surface and there is minimal potential for contamination from surface water. The source water is high in organic carbon, colour, iron and manganese. A series of treatment steps successively remove undesirable substances such as iron, manganese, organic carbon, colour, bacteria, and viruses from the water. The treatment process in Vars consists of the following steps: greensand filtration (using potassium permanganate to oxidize iron and manganese) granular activated carbon filtration (for organic carbon removal) primary disinfection (free chlorine applied as sodium hypochlorite) storage (disinfection contact time & hydraulic storage) This treatment process results in water that is clear and safe to drink. Treated water is then pumped through the distribution network to reach water customers in Vars. All treatment, pumping, and storage systems are controlled by a dedicated SCADA computer system and monitored by certified water treatment operators 24 hours per day. On-line analyzers are used to measure chlorine residual and turbidity of the treated water. In addition, a certified operator visits the well system twice per week to collect water samples and conduct on-site water quality tests. List all water treatment chemicals used over this reporting period Chlorine (sodium hypochlorite 6 wt%) Potassium Permanganate (KMnO 4 saturated solution) Were any significant expenses incurred to? [ ] Install required equipment [ ] Repair required equipment [ ] Replace required equipment Please provide a brief description and a breakdown of monetary expenses incurred 1. Granular Activated Carbon (GAC) replacement: Removed and replaced the filter media that is used in the filtration step in the treatment process (approximate cost $22,500) Page 2 of 6

3 2. 10 year Well Inspection: Golder Associates was hired to inspect the wells that supply the Vars well system. The inspection is done every ten (10) years and involves a physical inspection and hydraulic testing of the wells (approx $50,000) 3. Replaced valve in Well #2: During the inspection and removal of well pump, it was found that the foot valve in well #2 needed to be replaced. The valve was replaced and the well pump reinstalled. Provide details on the notices submitted in accordance with subsection 18(1) of the Safe Drinking-Water Act or section 16-4 of Schedule 16 of O.Reg.170/03 and reported to Spills Action Centre Incident Date Parameter Result Unit of Measure Corrective Action Corrective Action Date Microbiological testing done under the Schedule 10, 11 or 12 of Regulation 170/03, during this reporting period. Number of Range of E.Coli (min #)-(max #) Number of HPC Range of Total Coliform (min #)-(max #) (cfu/100ml) Range of HPC (min #)-(max #) (cfu/ml) Raw < Treated <10 Distribution < Operational testing done under Schedule 7, 8 or 9 of Regulation 170/03 during the period covered by this Annual Report. Number of Range of Grab (min #)-(max #) NOTE: For continuous monitors use 8760 as the Turbidity (NTU) number of samples. continuous Chlorine (free) (mg/l) Fluoride (If the DWS provides fluoridation) continuous (mg/l) (naturally occurring in ground water) NOTE: Record the unit of measure if it is not milligrams per litre. Summary of additional testing and sampling carried out in accordance with the requirement of an approval, order or other legal instrument. Date of legal instrument issued Parameter Date Sampled Result Unit of Measure Page 3 of 6

4 Summary of Inorganic parameters tested during this reporting period or the most recent sample results Parameter Sample Date 1 Result Value Unit of Measure Exceedance 2 Antimony Jan Dec ND mg/l No Arsenic Jan Dec mg/l No Barium Jan Dec 0.31 mg/l No Boron Jan Dec mg/l No Cadmium Jan Dec ND mg/l No Chromium Jan Dec mg/l No Lead Jan Dec mg/l No Mercury Jan Dec ND mg/l No Selenium Jan Dec ND mg/l No Sodium Jan Dec 23.9 mg/l Yes advisory 3 Uranium Jan Dec ND mg/l No Fluoride Jan Dec 0.15 mg/l No Nitrite Jan Dec ND mg/l No Nitrate Jan Dec ND mg/l No ND denotes non-detectable results NOTE 1 : Inorganic parameters are tested monthly. The values in the table represent annual average values. NOTE 2 : The determination of exceedances are based on all results in the data set. NOTE 3 : Sodium concentration is above the advisory limit of 20.0 mg/l for treated water. Notification of the sodium exceedance was made to the MOE and Public Health Department on October 5th 2007 for this water system (notification is required every 60 months). Summary of lead testing under Schedule 15.1 during this reporting period: (applicable to the following drinking water systems; large municipal residential systems, small municipal residential systems, and non-municipal year-round residential systems) Location Type Number of Range of Lead (min#) (max #) Number of Exceedances Plumbing 22 ND 9.0 µg/l 0 Distribution 4 ND 0.5 µg/l 0 Summary of Organic parameters sampled during this reporting period or the most recent sample results Parameter Sample Date Result Unit of Exceedance 1 Value Measure Alachlor Feb.22/11 ND mg/l No Aldicarb Feb.22/11 ND mg/l No Aldrin + Dieldrin Feb.22/11 ND mg/l No Atrazine + N-dealkylated metobolites Feb.22/11 ND mg/l No Azinphos-methyl Feb.22/11 ND mg/l No Bendiocarb Feb.22/11 ND mg/l No Benzene Feb.22/11 ND mg/l No Benzo(a)pyrene Feb.22/11 ND mg/l No Bromoxynil Feb.22/11 ND mg/l No Page 4 of 6

5 Carbaryl Feb.22/11 ND mg/l No Carbofuran Feb.22/11 ND mg/l No Carbon Tetrachloride Feb.22/11 ND mg/l No Chlordane (Total) Feb.22/11 ND mg/l No Chlorpyrifos Feb.22/11 ND mg/l No Cyanazine Feb.22/11 ND mg/l No Diazinon Feb.22/11 ND mg/l No Dicamba Feb.22/11 ND mg/l No 1,2-Dichlorobenzene Feb.22/11 ND mg/l No 1,4-Dichlorobenzene Feb.22/11 ND mg/l No Dichlorodiphenyltrichloroethane (DDT) + Feb.22/11 ND mg/l No metabolites 1,2-Dichloroethane Feb.22/11 ND mg/l No 1,1-Dichloroethylene (vinylidene chloride) Feb.22/11 ND mg/l No Dichloromethane Feb.22/11 ND mg/l No 2-4 Dichlorophenol Feb.22/11 ND mg/l No 2,4-Dichlorophenoxy acetic acid (2,4-D) Feb.22/11 ND mg/l No Diclofop-methyl Feb.22/11 ND mg/l No Dimethoate Feb.22/11 ND mg/l No Dinoseb Feb.22/11 ND mg/l No Diquat Feb.22/11 ND mg/l No Diuron Feb.22/11 ND mg/l No Glyphosate Feb.22/11 ND mg/l No Heptachlor + Heptachlor Epoxide Feb.22/11 ND mg/l No Lindane (Total) Feb.22/11 ND mg/l No Malathion Feb.22/11 ND mg/l No Methoxychlor Feb.22/11 ND mg/l No Metolachlor Feb.22/11 ND mg/l No Metribuzin Feb.22/11 ND mg/l No Monochlorobenzene Feb.22/11 ND mg/l No Paraquat Feb.22/11 ND mg/l No Parathion Feb.22/11 ND mg/l No Pentachlorophenol Feb.22/11 ND mg/l No Phorate Feb.22/11 ND mg/l No Picloram Feb.22/11 ND mg/l No Polychlorinated Biphenyls(PCB) Feb.22/11 ND mg/l No Prometryne Feb.22/11 ND mg/l No Simazine Feb.22/11 ND mg/l No Trihalomethanes 3 Jan Dec/ mg/l No Temephos Feb.22/11 ND mg/l No Terbufos Feb.22/11 ND mg/l No Tetrachloroethylene Feb.22/11 ND mg/l No 2,3,4,6-Tetrachlorophenol Feb.22/11 ND mg/l No Triallate Feb.22/11 ND mg/l No Trichloroethylene Feb.22/11 ND mg/l No 2,4,6-Trichlorophenol Feb.22/11 ND mg/l No 2,4,5-Trichlorophenoxy acetic acid (2,4,5-T) Feb.22/11 ND mg/l No Trifluralin Feb.22/11 ND mg/l No Vinyl Chloride Feb.22/11 ND mg/l No ND denotes non-detectable results NOTE 1 : Organic parameters are tested quarterly. The values in the table represent annual average values. NOTE 2 : The determination of exceedances are based on all results in the data set. NOTE 3 : The reported THM result is an annual average of the maximum value observed in each quarter. Page 5 of 6

6 List any Inorganic or Organic parameter(s) that exceeded half the standard prescribed in Schedule 2 of Ontario Drinking Water Quality Standards. Parameter Result Value Unit of Measure Date of Sample Page 6 of 6