@ Ontario

Transcription

@ Ontario

@ Ontario
Ministry of the Environment
LEFAIVRE WATER TREATMENT PLANT
Drinking Water System Inspection Report
DWS Number:
Inspection Number:
Date of Inspection:
Inspected By:
220002841
1-48S4U
Oct 26,2005
Jean Veilleux
@ Ontario
Table of Contents:
OWNER INFORMATION
CONTACT INFORMATION
INSPECTION DETAILS
DWS COMPONENT LOCATIONS
INSPECTION SUMMARY
LMR Introduction
LMR Source
LMR Capacity Assessment
LMR Treatment Process
LMR Operations Manuals
LMR Contingency and Emergency Planning
LMR Security
LMR Water Quality Monitoring
LMR Water Quality Assessment
LMR Reporting, Notification & Corrective Action
LMR Other Inspection Findings
NON COMPLIANCE WITH REGULATORY REQUIREMENTS
ACTIONS REQUIRED
SUMMARY OF BEST PRACTICE ISSUES
RECOMMENDED ACTIONS
SIGNATURES
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APPENDIX 1 DWS COMPONENT LOCATIONS DETAILS
APPENDIX 2 - AUDIT SAMPLE RESULTS 06-December-2005
APPENDIX 3 - PHOTOGRAPHS OF ALFRED-LEFAIVRE WTP
Report Generated for WHITEDA
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OWNER INFORMATION:
Company Name:
Street Number:
Street Name:
CountylDistrict:
DistrictlArea Office:
City:
Province:
ALFRED AND PLANTAGENET, THE CORPORATION OF THE TOWNSHIP OF
2015
Unit Identifier:
Lajoie St
United Counties of Prescott and Russell
Cornwall
Alfred and Plantagenet
ON
Postal Code:
KOB 1JO
CONTACT INFORMATION
___ _ - _ _ __ _ _ _
Type:
Phone:
Email:
Title:
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Type:
Phone:
Email:
Title:
-- -
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_
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Name:
Fax:
Main Contact
(613) 673-1161
[email protected]
Compl~anceTechnician
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Elise Campbell
(613) 6734812
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Name:
Fax:
Operator
(613) 673-1161
___
Jacques Breen
(613) 679-4735
Name:
Fax:
Owner
(613) 673-4797 x228
[email protected]
Deputy-Treasurer
--
Type:
Phone:
Email:
Title:
.-.- ...-
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OperatingAuthority
Name:
(613) 679-4631
Fax:
j breenaocwa.com
Operations Manager for Alfred Hub
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Type:
Phone:
Email:
Title:
_
Stephane Barbarie
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Charles Gagnon
Operator
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..-.-. .
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~.
INSPECTION DETAILS:
DWS Name:
LEFAIVRE WATER TREATMENT PLANT
DWS Address:
DWS Category:
DWS Number:
lnspection Type:
lnspection Number:
Date of Inspection:
Date of Previous Inspection:
2015 LAJOIE ST
Large Municipal Residential
220002841
Announced
1-48S4U
Oct 26,2005
Feb 15,2005
Site (Name):
Type:
ALFREDILEFAIVRE DISTRIBUTION SYSTEM
Other
Sub Type:
Report Generated for veilleuxje
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Other
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Comments:
The Lefaivre VVTP serves the Hamlet of Lefaivre with a population of 350-400 persons. The WTP also
distributes water to the Village of Alfred with a population of 1500, using a watermain and an elevated
reservoir. The tank is a composite-type storage structure (metal tank on a concrete pedestal) and has
a capacity of 1,562 cubic meters. The system includes 85 hydrants and 24 km of watermains. Free
chlorine residual is continuously monitored at the Village of Alfred Fire Hall.
Site (Name): RAW WATER
Type:
Source
Sub Type:
Surface Water
Comments:
The AlfredILefaivre Water Treatment Plant draws water from the Ottawa River through a 900 mm upturned flared elbow intake structure and a 500 mm diameter intake pipe. The intake extends
approximately 100 meters into the river from the shoreline. A low lift pumping station constructed from
concrete blocks and steel clad is located immediately North of the WTP. The structure houses a wet
well, two (2) removable inlet screens cleaned when required, four (4) vertical turbine low lift pumps,
two rated at 33.3 Ils, one rated at 14.7 11s and the last rated at 8.8 11s. These units pump against a total
dynamic head of 12m. The pumps are controlled by the treated water level in the clearwell.
The source water is generally low in dissolved solids, chlorides, nitrates, alkalinity, and has a neutral
pH. Dissolved organic carbon ranges from 5.0 to 6.0 mgll Source water turbidity is generally greater
than 1 NTU and can fluctuate with periods of precipitation and spring-runoff. Microbiological sampling
results for the raw water indicate that the raw water contains E-coli and total Coliform. Sodium
hypochlorite can be injected into the intake crib to control growth of zebra mussels. The intake was
last inspected by divers in June 2003. No signs of zebra mussels were observed and the intake was
deemed to be in good condition. Sodium Hypochlorite can also pre-chlorinate the low lift pump
discharge line. Soda Ash can also be injected into the raw water discharge line.
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Site (Name): TREATED WATER
Type:
Treated Water POE
Sub Type:
Treatment Facility
Comments:
The AlfredlLefaivre WTP is a conventional surface water treatment plant. Treatment equipment
includes one upflow clarifier unit, two double compartment dual media (anthracitelsand) filters, a two
compartment clearwell, two (2) separate high lift pumping facilities, one for the Lefaivre distribution
system, another for the Alfred distribution system. A coagulant feed system, a polymer feed system
and disinfection facilities using sodium hypochlorite.There are pumps and tanks specifically for postchlorination of the Alfred system transmission main, flow metering on the raw water line and both
distribution mains. Process wastewater treatment, a sanitary sewage septic system and standby
power are also included in the metal clad building that serves the WTP facilities.
The treatment process utilizes Phas as the primary coagulant, LT 25 polymer as a coagulant aid, soda
ash for pH-alkalinity control and hydrofluosilisic acid for fluoridation. Primary and secondary
disinfection is accomplished using sodium hypochlorite.
A metered 200 mm diameter main transmits raw water to the upflow clarifier. The coagulant is injected
close to the raw water meter prior to the clarifier and the coagulant aid (LT 25) is injected in the mixing
zone at the centre of the upflow clarifier. The coagulated water mixes under a central cone-shaped
skirt where a high floc concentration is maintained. Flow passes under the skirt and is directed
through a sludge blanket that forms at the bottom of the clarifier. Supernatant flows from the clarifier
into two (2) double compartment (4 in total) dual media filters. When filters are backwashed process
wastewater is directed to an equalization tank then settled wastewater enters a decanting tank and
the decanted wastewater is then discharged to the Ottawa River. Settled sludge is periodically
removed by a licensed hauler and disposed at the Alfred lagoons for final treatment. Filtered water
overflows a weirlsplitter box and is then distributed to a header discharging into a two compartment
clearwell. Fluoride and sodium hypochlorite are also added to the filtered water prior to the inline static
mixer ahead of the clearwell. Water is then pumped by two distinct high lift pumping facilities to the
Alfred distribution system and to the Lefaivre distribution system respectively. A secondary disinfection
system adds sodium hypochlorite to the Alfred distribution header to maintain the free c12 residual.
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The two distribution systems are also interconnected with a pressure regulating valve that allows the
Lefaivre system to be pressurized from the Alfred system water tower reservoir in case of need.
Each filter has a ABB Kent Model 4670 turbidity continuous analyzer in line with the filter effluent. Two
continuous chlorine analyzers are also in line with each distribution effluent line at the POE to the
systems. A pH analyzer and a fluoride analyzer are also on line continuously. Alarms are active for the
turbidities and chlorine residuals. The distribution is equipped with a Deplox 3 Plus continuous free
chlorine analyzer alarmed at 0.20 mgll. This analyzer is located at the Fire Hall in Alfred.
This system is also monitored by the Ontario Clean WaterAgency's Outpost 5 SCADA system. It is
capable of monitoring the chlorine residuals, turbidity readings and many other processes in the
system.
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INSPECTION SUMMARY
INTRODUCTION
* The primary focus of this inspection is to confirm compliance with Ministry of the
Environment legislation and authorizing documents such as Orders and Certificates of
Approval, as well as evaluating conformance with Ministry drinking water related policies
and guidelines during the inspection period.
The Ministry is implementing a rigorous and comprehensive approach in the inspection of
drinking water systems that keys on the source, treatment and distribution components of
the system as well as management practices.
This report is based on a "focused" inspection of your system. Although the inspection
involved fewer activities than those normally undertaken by a detailed inspection, it
contained most of the elements required to assess key compliance issues.
Your system was chosen for a focused inspection during this inspection cycle because
inspection findings over the past three years were such that the number of violations were
minimal or non existent, there were few or no orders issued to you that were of
significance in the maintenance of water potability and there were no deficiencies as
defined in 0.Reg. 172103. The undertaking of a focused inspection at your drinking water
system during this year's inspection cycle does not ensure that a similar type of
inspection will be conducted at any point in the future.
A physical inspection of the AlfredlLefaivre Water Treatment Plant and Distribution Systems was
conducted on the 26th and 27th of October, 2005. MOE Inspector, Jean Veilleux was
accompanied during the physical inspection by Stephane Barbarie, Process Technician, Charles
Gagnon, Operator in Charge and Maurice Benoit, Assistant Operations Manager. The
Corporation of the Township of Alfred-Plantagenet is the owner of the AlfredILefaivre Water
Treatment Plant and Distribution Systems. The operating authority for this system is OCWA
(Ontario Clean Water Agency).The inspection included a physical inspection of the treatment
plant and distribution facilities, and a document review. Plant operators were interviewed to
determine their overall perception as to how the plant was equipped and is being operated. The
period February 15th, 2005 to October 26th, 2005 is referred to as the "inspection period" in this
report.
The inspector collected SWIPDISTEND, SWlPDlST and SWlPTREAT shuttles and shipped them
to the MOE Laboratory in Toronto. As well, field measurements for free chlorine residuals were
obtained simultaneously with sample collection.
The previous compliance inspection, conducted on February 15th, 2005, identified ONE (1) minor
issue of non-compliance with regulatory requirements and ONE (1) action required to resolve the
issue. There were four (4) best practice issues resulting in five (5) best practice
recommendations. The MOE lnspector required the owner to submit an action plan complete with
implementation dates, outlining how the required actions andlor best practice recommendations
were to be addressed. The owner did submit an action plan to the MOE Inspector addressing all
of required actions identified in the inspection report. The previous inspection findings were
reviewed with the operating authority. All the issues have been addressed.
The inspection included a review and assessment of operating practices using the following
documents:
Drinking Water Systems Regulation (0.Reg. 170103)
Operator Certification Regulation (Water Works - 0 . Reg. 128104)
Report Generated for ve~lleuxje
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Certificate of Approval # C of A # 9014-5JASMT dated February 28th, 2003
Permit to Take Water # 90-P-4027 dated July 25th, 2003
Previous Ministry inspection report dated February 15th, 2005
"Township of Alfred-Plantagenet Lefaivre Water Treatment Plant Engineer's Report" by Stantec
Consulting Ltd.
Alfred-Lefaivre Water Treatment Plant 2004 Annual Report
Alfred-Lefaivre Water Treatment Plant Annual Record of Surface Water Taking
Alfred-Lefaivre Water Treatment Plant Operations Manual, 2004
Alfred-Lefaivre Water Treatment Plant Contingency Plan
Alfred-Lefaivre Water Treatment Plant Log Book
Aqua Proulx Underwater lnspection of Intake Pipe Report Lefaivre WTP September 09th, 2003
OCWA Performance Assessment Report, Alfred-Lefaivre Water Treatment Plant
Interviews with Charles Lauzon, Maurice Benoit, Jacques Breen, Stephane Barbarie of the
Lefaivre WTP
Personal notes from inspector's log book
The staff at the Lefaivre Water Treatment plant were very cordial, accommodating and open.
Their operation is professional; the site was very clean, orderly and efficiently operated. The
inspector was impressed by this facility and its operation.
SOURCE
*
Measures were in place to protect the water source in accordance with the Certificate of
Approval.
Source protection requirements are not identified in C of A # 9014-5JASMT but in line with
Condition 3.1 the Owner and operating authority are to consider the impact of his operating
decisions. A water source protection plan does not exist for this facility.
Provisions are made to chlorinate the intake in case of the appearance of Zebra Mussels.A diver
inspected the intake on September 09,2003 and found no evidence of Zebra Mussels on the
intake crib or on the surrounding substrates. An inspection of the sodium hypochlorite delivery
pipe ensured it delivered inside the intake crib. Operators also monitor the intake screens 3-4
times per year to verify if Zebra Mussels are present. At this time, chlorination of the intake is not
practiced. A pre-chlorination injection point just after the low lift pumps is in use. This causes
concerns for the formation of THMs since all the precursors to produce DBP are present in the
raw water.
Site specific contingency plans exist to deal with a Raw water emergency, up river spills and raw
source contamination. Previous inspection reports (2001-03) recomended that the owner develop
a source protection plan to at least identify what potential impacts exist for the raw water source.
OCWA also has in place a comprehensive Crisis Plan than enables the operating authority to
respond to various levels of emergencies using different resources province wide.
The diver's report indicates the intake structure is stable and in good condition. Furthermore, due
to the previous inspection date, 1994, along with insubstantial change on the structure since then,
the diving inspector recommends an inspection frequency of five (5) years contrary to previous
recommendation of an inspection every two years.
CAPACITY ASSESSMENT
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CAPACITY ASSESSMENT
*
Flow rates were maintained below the maximum flow rates or the rated capacity identified
in the Certificate of Approval.
According to the latest C of A # 9014-5JASMT for the Lefaivre VVTP, the rated plant effluent
capacity is 2900 m3lday. At no time during the recorded period has the effluent flow rate from the
treated flow meters exceeded the C of A values.
The rated capacity of water taking indicated in PTTW # 90-P-4027 is 2040 liters per minute or
2900 m3lday.
At the time of the inspection it was noted that in the month of March, April, May and August of
2005, treated flows exceeded the recorded raw water flows. The inspector pointed out this
discrepancy to the process technician who then investigated the matter and concluded that the
raw water flow meter was defective.
This event does not impact the ability of the plant to meet the criteria of C of A # 9014-5JASMT or
PTTW # 90-P-4027. Treated flow meters monitor the effluent to both distribution systems.
TREATMENT PROCESSES
*
Records reviewed during the inspection indicated that the drinking-water system provides
the required minimum level of treatment at all times.
All treatment equipment in the Lefaivre WTP is in good operating condition. Staff and the
operating authority have put effort in making sure all parts of the process are operating at all
times. The chemical feed system is now alarmed in case of failure. A UPS to supply power to the
SCADA unit ensures a continuation of operation in case of power surges or outages.
A workplace maintenance system program based on Hansen 7.5 is used by the Ontario Clean
Water Agency to schedule proper care of all equipment related to treatment processes. Records
and log book entries demonstrates chlorine analyzers, sodium hypochlorite metering pumps and
lines are well cared for thus ensuring proper free chlorine residual throughout the system.
All equipment and procedures prescribed in C of A 9014-5JASMT, as well as all requirements in
Procedure for Disinfecting Drinking Water in Ontario are adhered to. The operators are aware of
the CT values and proficient in using this calculation to ensure proper removal/inactivationof
virus and Giardia cysts.
An inspection of all the disinfection equipment has satisfied the inspector that operators operate
and maintain all disinfection equipment in a proper manner. The equipment was well arranged,
clean and functional. Drain lines, supply lines, return lines were installed in a clean and fastidious
manner. Logs indicated maintenance, repairs and improvements to the system.
*
*
When questioned, the operator was knowledgeable as to all the processes involved with the
plant. During sample collection for treated water at the plant, the inspector observed and
compared methods of detecting chlorine residual and is satisfied the operator is competent to
carry on his functions relating to the Lefaivre WTP disinfection system.
The drinking-water system was in compliance with the requirement to provide adequate
primary disinfection for the surface water source.
All equipment for the chlorination process is in compliance with requirements in C of A # 90145JASMT and with the Procedure for Disinfecting Drinking Water in Ontario. It is capable of
satisfying the required removal or inactivation of Cryptosporidium oocysts, a 3-log (99.9%)
removal or inactivation of Giardia cysts and a 4-log (99.99%) inactivation of viruses before the
water is delivered to the first consumer.
The operator was aware of the required CT value and the CT value was used in process
calculations and process control.
The inspector inquired about the CT values and is satisfied that the operator uses pertinent and
accurate information to weekly calculate the CT values. The operator and process technician both
informed the inspector CT values are calculated at every occurrence of adverse water conditions.
Both were reminded to use the maximum instantaneous flow to calculate the CT value.
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TREATMENT PROCESSES
* The owner ensured that equipment was installed in accordance with the Certificate of
Approval.
*
After reviewing C of A # 9014-5JASMT, all equipment included in PROPOSED WATER WORK
UPGRADES has been installed and is operational.
The operations logs verified that coagulant chemicals were fed on an on-going basis.
The Lefaivre WTP has a comprehensive daily log sheet that includes chemical use and dosages
based on flow data and calculated chemical use. Chemical feed systems are alarmed for failures
and monitored.
*
The operations and maintenance manuals contained plans, drawings and process
descriptions sufficient for the safe and efficient operation of the system.
The operation manuals and maintenance manuals are easily available to all operators at the
Lefaivre WTP. It is a comprehensive document that helps with the operation and maintenance of
the plant. Included in the Ops and Mtc manual the inspector found procedures on Transporting
Dangerous Goods, calculation of CT values for the WTP, contingency plans and procedures in
case of raw water contamination, power outages, back up generator failures, disinfection failure,
high low chlorine residuals, turbidity exceedences. Many more procedures were included along
with documentation on maintenance and operation of equipment. Also available to the operators
were the most recent versions of AWWA Standards C-653-03, C-652-02, C-651-99 and 05
revised procedures relating to various disinfection procedures for WTP, storage facilities and
disinfection repairs.
*
In addition to the material located in the office, many placards with specific instruction are located
at specific sites throughout the facility. Procedures pertaining to switching low lift controls from
hand to automatic, for mixing and dosing chemicals used in the process were well identified and
relevant.
The operations and maintenance manuals met the requirements of the Certificate of
Approval.
C o f A # 9014-5JASMT, Section 3.8 - 3.14 identifies requirements pertaining to operation and
maintenance manuals. The Lefaivre WTP manuals are adequate in filling those requirements.
Plans and drawings are available on site. Manuals are easy to find and documentation was
observed that these items were reviewed and updated in the last two years. On June 06, 2005,
the manual was updated by Stephane Barbarie to include revisedAWWA Standards.
CONTINGENCYIEMERGENCY PLANNING
*
Procedures existed for the periodic testing of the contingencylemergency plan.
During the plant inspection, the inspector reviewed the contingency plans located in the office at
the plant. Upon inspection, it was noted Maurice Benoit, Assistant Operation Manager reviewed
the Alfred-Lefaivre WTP contingency plans on January 12, 2005. On May 22nd, 2005, Charles
Gagnon, Operator reviewed the plans. This document contained the designated ORO, Mr. Jack
Breen, an updated contact list, a site plan and available emergency equipment.
The Ontario Clean Water Agency has a set procedure to review and update the existing
contingency plans. Upon request for a telephone contact list from the Lefaivre WTP on November
21th, 2005, it was supplied on the same day.
SECURITY
*
All storage facilities were completely covered and secure.
The clear wells and elevated tower are completely covered vessels.
Noted is the growth of vegetation on the roof of the clear well near the WTP. Some trees are
sprouting from areas on top of the clear well.
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SECURITY
Air vents associated with resewoirs and elevated storage structures were equipped with
screens.
*
The inspector visually verified that the in ground and elevated storage reservoirs were equipped
with screens capable of preventing access of small animals and birds.
The owner had provided adequate security measures to protect components of the
drinking-water system.
All the premises at the VVTP are protected with locked covers, access hatches and doors. All
entry doors are alarmed. A 1.8 meter fence surrounds the Plant to prevent access to the property.
Padlocks were in place on access hatches.
The elevated water storage tank is also protected with a 1.8 m. fence with barbed wire on top. No
entry alarm is used at this site. It is visited every two weeks. The property and exterior of the
water tower is very conspicuous from the street.
WATER QUALITY MONITORING
*
*
All microbiological water quality monitoring required by the legislation was being
conducted.
After a thorough review of the inspection period, it is observed that sampling according to 0 . Reg.
170103 is perfomed in a regular and routine manner. Every week, a raw water sample is
collected from the source of surface water, a treated sample from the POE in the system and
three distribution samples from the Alfred-Lefaivre system. Results are compiled in a binder and
kept accessible to staff and public.
All physicallchemical water quality monitoring required by the legislation was being
conducted.
A close review of laboratory reports for the Alfred-Lefaivre VVTP has determined all
chemicallphysical parameters requiring monitoring have been tested and recorded. Almost none
of the parameters have indicated any exceedences of the MAC, IMAC or other parameters set by
the C of A. No chemical or physical parameters exceeded the half of a parameter set in Schedule
2 of 0. Reg. I28103 with one exception.
*
THM results for the last four (4) quarters exceeded the ODWQS four quarter average. A review of
the past three inspection reports determined that THMs were always close to the OWDWS
objective, 100 pgll, but didn't exceed the MAC. This year's results exceeded the MAC set by the
ODWQS. As of now the calculated four quarter moving average of THMs in the system stand at
153.5 pgll. Chlorine and naturally organic precursors are at the origin of THMs. The practice of
pre-chlorinating at the outlet of the low-lift pumps has the possibility of forming disinfection byproducts since all the precursors of THMs are present.
All the water quality monitoring required by the Certificate of Approval was being
conducted.
C of A # 9014-5JASMT requires additional sampling on the raw water quarterly for the following
parameters:
Organic Nitrogen
Dissolved Organic Carbon
Color
All these additional parameters were collected and recorded accurately.
A monthly composite Suspended Solids sample from the process wastewater discharged to the
Ottawa river is also required. The results for the inspection period range from 15 mgll Suspended
Solids to <3 mgll SS. Samples were routinely collected for each month.
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* Continuous disinfectant residual analyzers were equipped with alarms to ensure
continuous disinfection.
The Alfred-Lefaivre VVTP and distribution system is equipped with three continuous chlorine
analyzers. All three are maintained and verified for accuracy on a regular basis. One analyzer is
for the treated water distributed to Lefaivre, the other also located at the WTP is for the treated
residual for the Alfred distribution system. An additional analyzer is located at the fire hall in Alfred
and measures the free residual in the Alfred distribution system.
A review of the log, questions asked of the operators and a verification of the units confirm that
both low and high c12 levels are monitored and alarmed. Response to alarms is forthwith and
timely.
*
A verification of the distribution free chlorine analyzer reading was accurate using a HACH pocket
chlorine analyzer.
Continuous water quality analyzers and indicators with alarm systems were installed at
the prescribed locations.
The Alfred-Lefaivre VVTP and distribution system is equipped with three continuous chlorine
analyzers. All three are maintained and verified for accuracy on a regular basis. One analyzer is
for the treated water distributed to Lefaivre, the other also located at the VVTP is for the treated
residual for the Alfred distribution system. Low alarms for these two analyzers are set at 0.60 mgll
and the high alarm at 2.00 mgll. An additional analyzer is located at the fire hall in Alfred and
measures the free residual in the Alfred distribution system.
Four turbidity analyzers are in line with each filter effluent lines.
A fluoride analyzer continuously monitors fluoride levels in the distribution system.
* The disinfectant residual was measured and recorded daily for the distribution system.
*
*
*
A Deplox 3 Plus free chlorine analyzer is located at the fire hall in Alfred. It is a regular sample
point and readings from this unit are recorded by the OUTPOST 5 SCADA system at the Lefaivre
WTP and in a logbook on site at the Fire Hall. While on site to collect a sample, the inspector
verified the accuracy of this analyzer and is satisfied it is accurate and well alarmed.
Records indicated that in all cases the chlorine residual levels in the distribution system
were not less than 0.05 mglL free or 0.25 mglL combined.
There were no indicated instances when the free chlorine residual fell below the required 0.05
mgll level for the inspection period.
Records confirmed that chlorine residual tests were being conducted at the same time
and at the same location that microbiologicalsamples were obtained.
Bacteriological samples include, on the chain of custody, and on the reports from Caduceon
Laboratory, the free chlorine residual level at the time of the sample as required by 0. Reg.
170103 6-3(1).
Records confirmed that disinfectant residuals were routinely checked at the extremities
and "dead ends" of the distribution system.
Records indicate that the operators collect and record chlorine levels at the ends of the
distribution systems.
On two separate instances, a review of the chlorine levels at one of the ends of the system, the
free residual dropped steadily throughout the month. In the month of May, 2005, the residual went
from 0.47 mgll to 0.26 mgll to 0.45 mgll before the level went over 0.50 mgll. In September of
2005, the free chlorine level went from 0.78 mgll down to 0.31 mgll over a period of three weeks.
These chlorine levels are quite adequate to provide the required disinfection but indicate that if
the ends are not monitored closely, there is the possibility of improper disinfection to occuring.
The Alfred-Lefaivre staff has a good grasp of where their system's weaknesses are. They are
encouraged to keep verifying the chlorine levels at all possible ends that exist in the system.
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1
* The drinking-water system was practicing chemically-assisted filtration and continuous
monitoring for turbidity was being performed at each filter effluent line.
I
The filtered water is monitored for turbidity by four (4) ABB Kent 46701500AM in line turbidity
analyzers that satisfy the requirements of the regulation and C of A # 9014-5JASMT. These units
measure turbidity in NTU units. OCWA's Outpost 5 SCADA system monitors and trends all
results.
WATER QUALITY ASSESSMENT
*
Treated water audit samples were collected during the inspection.
*
A treated SWlPTREAT shuttle and a SWlPDlST shuttle that included three distribution samples
were collected and shipped to the MOE Laboratory for analysis.
Raw water samples were not collected as part of the audit sampling.
*
A review of monitoring data provided by the operating authority does not confirm that the
water provided by the system met the requirements of the prescribed Ontario DrinkingWater Quality Standards.
The system did not meet all the requirements of the prescribed Ontario Drinking-Water Quality
Standards. Various monitoring data from the system operator and also data from DWlS
demonstrate that most parameters this system is required to monitor for were well within the
Ontario Drinking-Water Quality Standards.
However, THM results for the last four (4) quarters exceeded the ODWQS four quarter average. A
review of the past three inspection reports determined that THMs were always close to the
OWDWS objective, 100 pgll, but didn't exceed the MAC. This year's results exceeded the MAC
set by the ODWQS. As of now the calculated four quarter moving average of THMs in the system
stand at 153.5 pgll. Chlorine added to naturallyoccuring organic precursors are at the origin of
THMs. The audit samples taken and analyzed for THMs on the inpection date were at 145 ~ g l l .
The plant operators were diligent in reporting, in re-sampling, and in implementing any
recommended actions. After a recommendation by the inspector to cease pre-chlorinating at the
outlet of the low lift pumps, the operator implemented the recommendation immediately.
REPORTING & CORRECTIVE ACTIONS
*
*
Corrective actions, including any other steps that were directed by the Medical Officer of
Health, were taken t o address exceedances.
In all cases of verified exceedences, the inspector found consistency with records verified in IDS
and also LWIS. Corrective actions were prompt and efficient. While on site, an adverse water
quality incident occurred (AWQI # 60481). As soon as notified, S. Barbarie and C. Gagnon
responded according to the procedure instituted by their contingency plan. Notifications were
issued and proper corrective action was initiated. Issue resolution followed in the appropriate time
allotted.
All required notifications of adverse water quality incidents were provided to the Spills
Action Centre and Medical Officer of Health.
After verifying all MOE data for adverse water quality incidents, and comparing the issues with
the log book, Cornwall office files and files from Lefaivre WTP, it was concluded that incidents
were logged and accounted for. In one instance, a courtesy call from the operating authority due
to a reduction in pressure to the system was make to SAC and the MOH and measures were
taken to immediately correct the issue.
I
on 1/9/2006
Page 11 of 18
@ Ontario
REPORTING & CORRECTIVE ACTIONS
In instances where written notice of issue resolution was required by regulation, the
notice of issue resolution was provided within seven (7) days of the issue being resolved.
*
All issues were resolved forthwith and issue resolution forms were sent in. However, on the form
for Written Notice By Drinking Water System Owner, Section 2 (a), under Corrective Actions
Taken by Owner, all boxes are meant to be checked either yes or no. The staff of the Lefaivre
WTP does not always check all boxes.
Notices of issue resolution contained a summary of the actions taken and results
achieved.
Detailed actions were recorded in the log and on Notices of lssue Resolution Section 2 (b).
An ongoing condition of the Lefaivre VVTP pertains to elevated THM levels in the Alfred system.
lssue resolution is ongoing.
*
*
*
It can be noted that more information could make it's way on the lssue Resolution form Sec. 2 (b)
to reflect the ongoing nature of the THM problem.
When alarms for continuous monitoring equipment sounded, appropriate actions were
taken in a timely manner by a qualified person.
The operating authority has an on call schedule and a complete alarm system. It also relies on a
system that generates alarms from the Outpost 5 SCADA called "Keep In Reach" that reacts to
various system alarms. On all instances of alarms, an operator responded forthwith and logged
the problem and it's resolution.
When no one was at the location wherelwhen an alarm sounded, a qualified person was
promptly dispatched.
On occasions where an alarm from a continuous analyzer is activated, operators on call respond
forthwith and log the event and the resolution.
When qualified persons were dispatched for alarms, they arrived at the location as soon
as possible.
All on call operators reside close enough to the worksites that their response time is adequate.
Immediately upon dispatch, they acknowledge the problem using their cell phones or drive to the
site as soon as possible. Log book entries indicate a satisfactory response time on occasions
when the operator had to attend to the plant.
On certain occasions, the operator uses OCWA's Outpost 5 SCADA system to verify the
problems and determine whether a physical response is required.
OTHER INSPECTION FINDINGS
*
*
The following instances of non-compliances were also noted during the inspection:
According to the latest C o f A # 9014-5JASMT Section 2.1 (b) The Owner is to ensure that the
flow measuring devices are to be calibrated to within plus or minus 5% of the actual rate of flow
within 10% to 100% of the full scale reading of the flow meter. At the time of the inspection it was
noted that in the month of March, April, May and August of 2005, treated flows exceeded the
recorded raw water flows. The inspector pointed out this discrepancy to the process technician,
who investigated the matter and concluded that the raw water flow meter was defective. By
utilizing a draw down test of the raw well, the operator estimated his raw water meter was off by
40-50%. The inspector was further informed that an accumulation of PHAS sludge in the raw
water feed line was obstructing the accuracy of the flow meter. The operator cleaned the line and
verified the accuracy of the meter and it conformed to the C of A recommendations.
The ownerloperator complied with all Orders or other control documents issued between
the date of the previous inspection and the date of this inspection.
on 1/9/2006
Page 12 of 18
I @ Ontario
I
OTHER INSPECTION FINDINGS
*
I
The ownerloperator implemented those recommendations issued between the date of the
previous inspection and the date of this inspection.
on 1/9/2006
Page 13 of 18
@ Ontario
NON COMPLIANCE WITH REGULATORY REQUIREMENTS
Not Applicable
on 1/9/2006
Page 14 of 18
@ Ontario
ACTIONS REQUIRED
This section provides further detail regarding the non compliance items listed on the previous
page, as well as actions required to address each issue.
1
According to the latest C of A # 9014-5JASMT Section 2.1 (b) the Owner is to ensure that the
flow measuring devices are calibrated to within plus or minus 5% of the actual rate of flow within
10% to 100% of the full scale range of the flow meter. At the time of the inspection, it was noted
that in the month of March, April, May and August of 2005, treated flows exceeded the recorded
raw water flows. The inspector pointed out this discrepancy to the process technician, who
investigated the matter and concluded that the raw water flow meter was defective. By utilizing a
draw down test of the intake well, the operator estimated the raw water meter was off by 4050%. The inspector was further informed that an accumulation of PHAS sludge in the raw water
feed line was obstructing the accuracy of the flow meter. The operator cleaned the line, reverified the accuracy of the meter and it conformed to the C of A recommendations.
To prevent this event from recurring, the operating authority will provide to the undersigned
inspector, no later than February 15, 2006, a written assessment of the nature of the problem
concerning raw water flow meter accuracy, how the issue was resolved and also an operation
and maintenance procedure to ensure such a situation will not recur. In addition, a plan outlining
a regular verification of flow accuracy using in plant comparisons between treated, waste and
raw water meters is to be established and documented in the log book and maintenance system.
on 1/9/2006
Page 150f 18
@ Ontario
SUMMARY OF BEST PRACTICE ISSUES
Not Applicable
on 1/9/2006
Page 16 of 18
I
@
Ontario
I
RECOMMENDED ACTIONS
This section provides a summary of recommended actions to address best practice issues
identified on the previous page. Owners and operators should develop an awareness of these
practices and take measures to implement them so that all drinking water systems continuously
improve their processes. In the interest of continuous improvement, we provide the following
suggestions:
1
During the plant tour the inspector observed fluoride containers along the East wall of the facility
by the air compressor. Upon inquiring from the operator, the inspector was informed they were
condensate collectors for the moisture produced by the air compressor dryers.
As a best practice, these containers should be identified and relabeled so as to eliminate any
chance of using this condensate in any inappropriate place.
2
This recommendation is issued in relation to the recording and reporting of AWQI. The staff at
the Lefaivre WTP are diligent and proficient when it comes to reporting and recording instances
of adverse water quality incidents. However, improvements could be make to clarify events and
actions taken.
On the form for Written Notice By Drinking Water System Owner, Section 2 (a), under
i)
Corrective Actions Taken by Owner, all boxes are meant to be checked either yes or no. The
staff of the Lefaivre WTP does not always check all boxes.
An ongoing condition of the Lefaivre WTP pertains to elevated THM levels in the Alfred
ii)
system. lssue resolution is ongoing. More information such as Medical Officer of Health
recommendations or comments, or inspector's reaction, operator actions could make its way on
the lssue Resolution form Sec. 2 (b) to reflect the ongoing nature of the THM problem.
3
It was noticed that over the clear wells, east of the plant, some vegetation is growing. Some
small trees are starting to sprout and risk rooting on top of the clear wells. It is recommended
that these trees be removed.
4
In relation to the exceedences of the Ontario Drinking Water Standards of 100 pg/I for Total
Trihalomethane for the AlfredlLefaivre Distribution System, on November 25, 2005 the inspector
recommended that the practice of pre-chlorination at the Lefaivre low lift outlet be discontinued
to establish if this action would reduce THM formation. This recommendation was implemented
as soon as practicable by staff at the WTP. The results of this change of operation procedure
should become apparent in the next quarters when they are compared to records of the past
years. Since this recommendation is not a final solution to the problems of THMs, the owner and
the operating authority will by April 1, 2006, provide to the undersigned inspector, an action plan
which identifies measures that will be taken to investigate and implement THM controls.
5
During the visual inspection of the plant, the inspector observed that the top of the filter tanks,
conveying filtered water to the clear well, were exposed to the open air within the plant. This
water has already been filtered and will receive no further treatment except chlorination and
storage before distribution. Contaminants from the air and any structure or personnel traffic
above the filter tops may fall into the water. As a best practice, it would be prudent to cover the
tanks to avoid any contamination of the filtered water.
on 1/9/2006
Page 17 of 18
@ Ontario
SIGNATURES
Inspected By:
Signature: (Provincial Officer):
Jean Veilleux
~
Reviewed & Approved By:
Signature: (Supervisor):
James Mahoney
Review & Approval Date:
Note: This inspection does not in any way suggest that there is or has been compliance with
applicable legislation and regulations as they apply or may apply to this facility. It is, and remains,
the responsibility of the owner and/or operating authority to ensure compliance with all applicable
legislative and regulatory requirements.
on 119/2006
Page 18 of 18
@ Ontario
APPENDIX 1
DWS COMPONENT LOCATIONS DETAILS
Drinking Water System inspection Report Appendix A
Ontario
DRINKING WATER SYSTEM COMPONENTS DESCRIPTION
Name:
Station Id #:
Type:
Sub Type:
ALFREDILEFAIVRE DISTRIBUTION SYSTEM
Other
Other
Street Name:
Street Number:
Concession:
Reference Plan:
Lot:
Part:
Map Datum:
Geo-Referencing Method:
Accuracy Estimate:
Location Reference:
UTM Northing:
Latitude:
Name:
Station Id #:
Type:
Sub Type:
NAD 83
GPS
1-10 Meters (Good Quality GPS)
Near Object
UTM Zone:
UTM Easting:
Longitude:
RAW WATER
Source
Surface Water
Street Number:
Street Name:
Concession:
Reference Plan:
Lot:
Part:
NAD 83
GPS
Near Object
UTM Zone:
5053996
UTM Easting:
Longitude:
Map Datum:
Accuracy Estimate:
Location Reference:
UTM Northing:
Latitude:
Name:
Station Id #:
Type:
Sub Type:
18
5082 19
TREATED WATER
Treated Water POE
Treatment Facility
Street Number:
Street Name:
Concession:
Reference Plan:
Lot:
Part:
on 1/9/2006
Page 1 of 2
Drinking Water System Inspection Report Appendix A
@
Ontario
I
Map Datum:
Accuracy Estimate:
Location Reference:
UTM Northing:
Latitude:
NAD 83
GPS
Near Object
UTM Zone:
5053996
UTM Easting:
Longitude:
on 1/9/2006
18
508219
Page 2 of 2
@ Ontario
APPENDIX 2
AUDIT SAMPLE RESULTS
APPENDIX
Table 1
ALFRED (LEFAIVRE) WATER TREATMENT PLANT
26-OCT-2005
CHEMICAL 1 PHYSICAL PARAMETERS - HEALTH RELATED
-
Sample # 1
Sample # 2
- TREATED WATER
- ALFRED FIRE HALL, 261 ST. PHILLIPE ST. HWY 17 DISTRIBUTION
Shortforms:
<T
-
A measurable trace amount; interpret with caution
NA
<W
-
No measurable response (zero) : < Reported value
NS
<=W
-
NGL
-
Nanograms per litre
<
-
Actual result is less than reported value
UGlL
-
Micrograms per litre
ND
-
Not detected
MGL
-
Milligrams per litre
!NP
-
No appropriate procedure available
Page 1
-
Result not available
-
Not sampled
Module: wb swiwdf
Footnotes:
1 Maximum Acceptable Concentration
2 Interim Maximum Acceptable Concentration
3 Aesthetic Objective
4 Includes alpha-chlordane, gamma-Chlordane and Oxychlordane
5
Includes p.pl-DDE, o,p'-DDT, p,pl-DDD and p,p'DDT
a) Total toxic equivalents when compared with 2,3,7,8,-TCDD (tetrachlorodibenzo-p-dioxin)
b) Where fluoride is added to drinking water, it is recommended that the concentration be adjusted to 0.5 - 0.8 m a , the optimum level for control of
tooth decay. Where supplies contain naturally occurring fluoride at levels higher than 1.5 m& but less than 2.4 m a the Ministry of Health and
Long Term Care recommends an approach through local boards of health to raise public and professional awareness to control excessive exposure to
fluoride from other sources. Levels above the MAC must be reported to the local Medical Officer of Health.
c) This standard applies to water at the point of consumption. Since lead is a component in some plumbing systems, first flush water may contain
higher concentrations of lead than water that has been flushed for five minutes.
d) Where both nitrate and nitrite are present, the total of the two should not exceed 10 mg/L (as nitrogen).
e) The standard is expressed as a running annual average of quarterly samples measured at a point reflecting the maximum residence time in the
distribution system.
Page 2
Module: wb swip.rdf
APPENDIX
Table 2
26-OCT-2005
AUDIT SAMPLE RESULTS MICROBIOLOGICAL PARAMETERS - HEALTH RELATED
I
I
1
I
Sample #
Sample #
Sample #
Sample #
1
2
3
4
- TREATED WATER
- DEPANEUR LAVOIE, 2070 LAJOIE ST. DISTRIBUTION
- DEPANEUR LALONDE, 561 ST. PHILLIPE HWY 17 DISTRIBUTION
I
I
I
I
I
I
I
I
I
I
I
09-JAN-2006
Page 3
Module: wb swia.rdf
APPENDIX
Table 2
26-OCT-2005
AUDIT SAMPLE RESULTS MICROBIOLOGICAL PARAMETERS - HEALTH RELATED
Sample #
Sample #
Sample #
Sample #
1
2
3
4
- TREATED WATER
- DEPANEUR LAVOIE, 2070 LAJOIE ST. DISTRIBUTION
- DEPANEUR LALONDE, 561 ST. PHILLIPE HWY 17 DISTRIBUTION
Notes:
-
Escherichia coli is a more definitive indicator of fecal contamination than fecal coliforms or total coliforms.
At elevated levels, the general bacterial population may interfere with the detection of coliforms. This general population can be estimated from
either background colony counts on the total coliform membrane filters or heterotrophic plate counts (HPC).
Shortforms:
C/100mL C/mL
-
Count per 100 millilitre
Count per millilitre
Footnotes:
I. Maximum Acceptable Concentration
2. Aesthetic Objective
Page 4
Module: wb swip.rdf
I
I
I
I
According to section 16-3 of 0.Reg. 170103,thefollowing are prescribed as adverse results of a drinking-water test for the purpose of section 18
of the Safe Drinking Water Act 2002:
1. A result that exceeds any of the standards prescribed by Schedule 1,2 or 3 to the Ontario Drinking-Water Quality Standards, other than the
standard for fluoride, if the result is from a sample of drinking water.
2. A result indicating the presence of Aemmonas spp., Pseudomonas ae~ginosa,Staphylococcus aureus, Clostridium spp. or fecal streptococci
(Group D streptococci) in a sample of drinking water.
3. A result indicating the presence of a pesticide not listed in Schedule 2 to the Ontario thinking-Water Quality Standards in a sample of drinking
water, at any concentration.
4. A result indicating that the concentration of free chlorine residual is less than 0.05 milligrams per litre in a distribution sample, if the drinkingwater system provides chlorination and does not provide chloramination.
5. A result indicating that the concentration of combined chlorine residual is less than 0.25 milligrams per litre in a distribution sample, if the
drinking-water system provides chloramination.
6. If the drinking-water system is required to provide filtration and a report under subsection 18 (1) of the Act has not been made in respect of
turbidity in the preceding 24 hours, a result indicating that turbidity exceeds 1.0 Nephelometric Turbidity Units (NTU) in,
I
I
I
I
I
i, a grab sample of water taken from a filter effluent line, or
ii. two samples of water from a filter effluent line that are tested by continuous monitoring equipment, if the two samples were taken 15 minutes
or more apart and the later of the two samples was the first sample that was taken 15 minutes or more after the earlier sample.
7. If an approval or order, including an OWRA order, identifies a parameter as a health-related parameter and establishes a maximum
concentration for the parameter, a result indicating that the parameter exceeds the maximum concentration in a sample of drinking water.
8. A result indicating that the concentration of sodium exceeds 20 milligrams per litre in a sample of drinking water, if a report under subsection
18 (1) of the Act has not been made in respect of sodium in the preceding 60 months.
9. A result indicating that the concentration of fluoride exceeds 1.5 milligrams per litre in a sample of drinking water, if,
i. the drinking-water system provides fluoridation and a report under subsection 18 (1) of the Act has not been made in respect of fluoride in the
preceding 24 hours, or
ii. the drinking-water system does not provide fluoridation and a report under subsection 18 (1) of the Act has not been made in respect of
fluoride in the preceding 60 months.
Page 5
Module: wb swip.rdf
APPENDIX
Table 3
26-OCT-2005
CHEMICAL / PHYSICAL PARAMETERS - NOT HEALTH RELATED
-
I
Sample # 1
Sample # 2
- TREATED WATER
Parameter
Units
ALUMINIUM, UNFILTERED TOTAL
UGL
AMMONIUM, TOTAL UNFIL.REAC
MGIL
COPPER, UNFILTERED TOTAL
UGL
ETHYLBENZENE C8H10
IRON,
OBJECTIVE
SAMPLE
TYPE OF
OBJECTIVE
100
18
OG
SAMPLE
I
#
#
+I-1.50
a
,002
<=W
1000
A0
14.1
+I-1.10
UGL
2.4
A0
.05
C=W
UGL
300
A0
6
+I-6.00
MANGANESE,UNFILTERED TOTAL
UGL
50
A0
4.94
+I-0.72
TOLUENE
UNFILTERED TOTAL
a
2
.05
<=W
UGL
24
A0
.05
<=W
.05
<=W
XYLENE-M AND P
UGL
300
A0
.05
<=W
.05
<T
XYLENE-0
UGL
300
A0
.05
<=W
.05
<T
UGIL
5000
A0
8.4
+I-1.00
C7H8
C8HIO
ZINC, UNFILTERED TOTAL
Shortforms:
I
<T
-
A measurable trace amount; interpret with caution
<W
-
<=W
-
-
<
I
I
I
Actual result is less than reported value
ND
-
Not detected
NA
-
Result not available
NS
-
Not sampled
DEG
-
Degree celsius
A0
-
Aesthetic Objective
OG
-
Operational Guideline
FIX = NTU
-
Nephelometric Turbidity Unit
TCU
-
True Colour Units
NGiL
-
Nanograms per litre
UG/L
-
Micrograms per litre
MG/L
-
Milligrams per litre
Footnotes:
a)
No limit has been established for this parameter.
b)
Organic Nitrogen = (Total Kjeldahl Nitrogen - Ammonia)
c)
The aesthetic objective for sodium in drinking water is 200 mg/L. The local Medical Officer of Health should be notified when the sodium
concentration exceeds 20 mg/L. so that this information may be communicated to local physicians for their use with patients on sodium restricted
diets.
When sulphate levels exceed 500 mg/L, water may have a laxative effect on some people.
e)
I
Applicable for all water at the point of consumption.
Page 6
Module: wb swip.rdf
@ Ontario
APPENDIX 3
PHOTOGRAPHS OF ALFRED-LEFAIVRE WTP
Photographs of AlfredILefaivre WTP
Picture # 1:
AlfredILefaivre filter top, treated water flowing to clear well collection header exposed to
atmosphere. (See Recommendation Actions # 5)
Picture # 2
Clear instruction on low lift local switch use during maintenance and procedure to reset
SCADA to enable automatic pump operation. (See OPERATIONS MANUALS Page 8)
Photographs of AlfredILefaivre WTP
POLYMER
e
k.
Instruction to mix polymer (See OPERATIONS MANUALS Page 8)
Picture # 4
Low lift pumping station, pre-chlorine injection point is just to the right on main header.
(See Recommendation Actions # 4)

@ Ontario

Transcription

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