Corporation of the Town of Perth Drinking Water System ... · 1.3.2. Water Treatment Subsystem...

Corporation of the Town of Perth

Drinking Water System

2017 Summary Report

Table of Contents Overview ........................................................................................................................ 4

SECTION 1 – FAILURE TO MEET REQUIREMENTS ................................................... 6

1.1 Adverse Water Quality Incident reports (Drinking Water System) ...................... 6

1.2 Ministry Orders ................................................................................................... 7

1.2.1. Drinking Water System .......................................................................... 7

1.2.2. Water Treatment Subsystem ................................................................. 7

1.2.3. Water Distribution Subsystem ................................................................ 7

1.3 Additional Known Failures to Meet Requirements .............................................. 7



1.3.3 Water Distribution Subsystem ................................................................ 8

1.4 Additional concerns regarding meeting requirements ......................................... 8



1.4.3. Water Distribution Subsystem ................................................................ 9

SECTION 2 – SUMMARY OF PLANT FLOWS ............................................................ 10

2.1 Raw Water (Source water) ............................................................................... 10

2.1.2 Maximum Raw Water Flow: ................................................................. 11

2.2 Service Water (Treated Discharged Water) ...................................................... 11

2.2.1 Average Daily Service Water Flow: ...................................................... 12

2.2.3 Service Water Discharge: .................................................................... 12

2.3 Plant process water .......................................................................................... 12

2.3.1 Backwash water to Waste: ................................................................... 13

SECTION 3 – SUMMARY OF DRINKING WATER SYSTEM ABILITIES .................... 14

3.1. Water Treatment Ability .................................................................................... 14

3.1.1. Disinfection ability ................................................................................ 14

3.1.2. Chlorine Dioxide use ............................................................................ 14

3.1.3. pH adjustment (use of lime) ................................................................. 15

3.1.4. Coagulation abilities ............................................................................. 15

3.1.5. Pumping capacity ................................................................................. 15

3.1.6. Computer System ................................................................................ 16

3.2. Water Taking Ability .......................................................................................... 16

3.3. Water Storage Ability ........................................................................................ 17

3.4. Water Treatment and Distribution Personnel .................................................... 17

Table 1 – Summary of Flows January 1, 2017 to December 31, 2017 ...................... 19

Table 2 – Historical Average Daily Service Water Flow (m3) ..................................... 20

Table 3 - 2017 Raw Water Taking Perth Water Treatment Plant ............................... 21

Perth Water Treatment Plant Summary Report 2017

2017 Summary Report

Overview

A Summary Report, as per Ontario Regulation 170/03, Schedule 22 must be prepared for each drinking water system in the province of Ontario. The report must be provided no later than March 31 to members of Municipal Council.

The DWS Summary report will cover a period for the preceding calendar year, January 01 to December 31, 2017. The completion and presentation of this report will also fulfill the requirement for a compliance report to be produced in accordance applicable regulations.

Section 1 contains,

any failures during the reporting periods to achieve the requirements of the Safe Drinking Water Act, associated drinking water regulations and guidelines, any approvals, any operating licences or permits, or any orders applicable to the Perth DWS system;

duration of the failure, and measures taken to correct the failure;

any priority concerns that might lead to failures to meet the operating requirements.

Section 2 contains, summary of quantities and flow rates of water taken from the Tay River, in addition to

water production and process wastewater generation.

Section 3 contains, an overview summary of the DWS water treatment abilities

summary of the DWS water taking ability, DWS water storage ability,

summary of DWS operating personnel Supplemental Perth DWS information sources would include, but not limited to,

The Town of Perth Water Treatment Plant year end documentation, The Town of Perth Water Distribution year end documentation, The Town of Perth DWS Annual Report.

Supplemental government legislation sources would include, but limited to,

Safe Drinking Water Act, 2002 Ontario Regulation 170/03, Drinking Water Systems Ontario Regulation 169/03, Ontario Drinking Water Quality Standards Ontario Regulation 128/04, Certification of Drinking Water System Operators and Water

Quality Analysts It is noted to ensure currency, up to date documents can be reviewed at http://www.e-laws.gov.on.ca.

Supplemental government support documentation is available at the Ministry of the Environment and Climate Change’s Drinking Water Ontario website, https://www.ontario.ca/page/drinking-water.

http://www.e-laws.gov.on.ca/

https://www.ontario.ca/page/drinking-water


DWS Information

Drinking-Water System Number 220001272

Drinking-Water System Name: Perth Drinking Water System

Drinking-Water System Owner: Perth, The Corporation of the Town of

Period being reported: Jan 01, 2017 to Dec 31, 2017

Latest MOECC Inspection Dec 14 and 15, 2017

Previous MOECC Inspection Dec 14 and 22, 2016

Drinking-Water System Category: Large Municipal Residential System (LMRS)

Drinking Water System Facilities Class III Water Treatment Subsystem,

Class I Water Distribution Subsystem

Municipal Drinking Water Licence (MDWL) 160-101

Licence Issue Date August 04, 2016

Licence Revision Date (most recent) August 17, 2017

Licence Expiry Date August 03, 2021

Drinking Water Works Permit 160-201

DWWP Issue Date August 04, 2016

Permits to Take Water 7770-A8HKRH

PTTW Issue Date March 29, 2016

Water Taking Location Tay River

Financial Plan Number (under O. Reg. 453/07) 160-301

Accredited Operating Authority The Corporation of the Town of Perth

Operating Authority No. 160-OA1

Operational Plan No. 160-401


SECTION 1 – FAILURE TO MEET REQUIREMENTS

1.1 Adverse Water Quality Incident reports (Drinking Water System)

During the reporting period, there were no Adverse Water Quality Incident (AWQI)

reports filed with the MOECC Spills Action Center (SAC).

1.1.2. Environment and Climate Change Canada (ECCC), Fisheries Act

On April 06, 2017, a Water Treatment Plant site visit occurred from two (2) federal

ECCC enforcement officers who were investigating current process wastewater

discharges to the environment from water treatment facilities in the area. A

concern was raised regarding the levels of chlorine residual being discharged

during filter backwashing.

Filter backwashing uses disinfected water from the reservoir and has done so since

the facility’s inception in 1964. Filter backwash water de-chlorination is included in

Phase II of the Process Wastewater Management Plan, however that project

construction is still on-going. WTP staff immediately implemented other short-term

de-chlorination measures and will continue to use until Phase II systems are in

place. The corrective measures taken met the Environment Canada report

recommendations and action items to be followed.

Ontario MOECC officials were made aware of the site visit and resulting course of

events.

1.1.3. MOECC (SAC # 7050-ASPQX2), MDWL 160-101

On November 02, 2017, MOECC officials were contacted regarding a high Total

Suspended Solids (TSS) Phase I process wastewater discharge into the

environment.

The high TSS was a result of a failed geo-bag membrane while being pressurized

under normal operations. After investigation, it was discovered the failed area of

the membrane had been weakened earlier, and witnesses to the event described it

as being a small pin stream that quickly morphed to a 6” bag tear. Most of the

treated sludge was contained in the bag de-watering catchment area, however

water discharging was also occurring at the time. Before operators could contain

the water and sludge flow, some direct discharging of high suspended solids was

suspected to have occurred. The site was cleaned up, any collected sludge

disposed of in the proper manner, and normal operations resumed using a standby

geo-bag.


1.2 Ministry Orders

1.2.1. Drinking Water System No MOE orders issued.

1.2.2. Water Treatment Subsystem No MOE orders issued.

1.2.3. Water Distribution Subsystem No MOE orders issued.

1.3 Additional Known Failures to Meet Requirements

An MOECC DWS inspection was conducted Dec14 and 21, 2016, with the

Inspector’s report released March 29, 2017. Required action items are listed below

in sections 1.3.1 to 1.3.3.

1.3.1. Drinking Water System

Requirement failure

Requirement location

Duration of failure Any corrective action taken

Notification of DWS information to system owner

Better assurance that proper information is presented to Council

Identified by MOECC as a required action

Copies of the MWDL and MWWP for forwarded to Council members

Reminder on file to ensure notifications are made with MDWL and MWWP renewals or changes

1.3.2. Water Treatment Subsystem

Requirement failure



Operations and Maintenance Manual (requirements of the DWWP and MDWL not being met)

Need of update to reflect operational changes


complete OM manual document recreation, also in electronic form.

sign off sheet in place to ensure annual OM review

2018 start of a new preventative maintenance program.


1.3.3 Water Distribution Subsystem

Requirement failure



A water tower overflow incident not recognized as a reportable spill

On Nov 17, 2016 a brief overflow of water after water level maintenance work.


MDWL requirements reviewed, procedure to call Spills Action Center if any doubt

Provide proper operations tests on satellite DWS systems served by the Town.

Drinking water being supplied to Tay Valley Township users


Tay Valley servicing agreement to be changed to reflect identified inspection report items.

1.4 Additional concerns regarding meeting requirements

1.4.1. Drinking Water System

Issue Any corrective action taken

none

1.4.2. Water Treatment Subsystem

Issue Concern Corrective action taken or proposed

Reservoir isolation valves

Equipment is aged and unreliable

Reservoir valve replacement program initiated in 2017, with need to continue with priority valves until completed.

Process Wastewater Residue Management

TSS reduction and de-chlorination of process residue wastewater

Phase 2 development is continuing and includes treatment of all other process wastewater sources.

Bulk chemical storage

Proximity of the bulk chemical storage tanks

Preliminary investigation into options to be initiated in 2018.

Dry Chemical volumetric feeders

Equipment is becoming aged and of concern

With increased unmanned facility operations, concern is heighted. Staff have implemented some remedial actions; however, equipment style is now outdated, and liquid chemical options need to be considered.


Operational electrical demand

Electrical needs for upgrading or unit replacement

electrical transformers and panels,

electrical water pump use,

heating units.

Program initiated to start replacing aged panels and transformers throughout facility. A new main power MCC installation in 2018 should create more efficient water pump operations opportunities to be considered. Further streamlining and upgrading of equipment is required to allow for future electrical power needs.

Further automation installations and upgrading

Basic automation operational needs are in place (on/off), but more digital upgrades are required to move forward.

The focus of automation needs to start addressing more in-depth treatment process monitoring to allow SCADA to perform a more efficient operations and water quality issue alerting. While some of the outdated analog circuitry has started to be replaced with digital communication networks, a significant majority of the work still remains. Development of the Balluff network communication system will allow multiple instrumentation device to interconnect to SCADA without the reliance on multi analog wire circuitry and large panel boxes.

1.4.3. Water Distribution Subsystem

Issue Any corrective action taken or being proposed

none


SECTION 2 – SUMMARY OF PLANT FLOWS

2.1 Raw Water (Source water)

Table RW-3 located in the reports Appendix offers an individual daily RW flow

expressed in Liters/day (1000 L = 1 m3).

The table below (RW-1) gives the monthly average RW flow, monthly single day

max and min flows, and the monthly total RW intake flow volume. A comparison of

the single day maximum of the month to the PTTW allowable volume of 9090 m3 is

shown.

Table RW-1

2.1.1. Average Daily Raw Water Flow:

The monthly average of daily average raw water flow was 2,804.23 m³ in 2017, or approximately 30.84% of the PTTW. The daily average in 2015 was 3,214 m³, followed by 2,817 m3 in 2016. Factoring weather conditions, a continued consistent water demand over recent years can be shown.

2017 Raw Water Volumes

Average Daily Flow

(m3)

Minimum Daily Flow

(m3)

Maximum Daily Flow

(m3)

TOTAL FLOW (m3)

Daily Maximum % of PTTW Allowable

Volume

January 2536.5 2128 2896 78,633 31.9%

February 2591.0 2260 2976 72,549 32.7%

March 2619.9 2279 3001 81,218 33.0%

April 2695.2 2203 4029 80,855 44.3%

May 2584.3 2256 3157 80,113 34.7%

June 2964.2 2286 3742 88,927 41.2%

July 2898.4 2332 3423 89,851 37.7%

August 2955.1 2327 3447 91,607 37.9%

September 3060.1 2656 3665 91,803 40.3%

October 3016.2 2345 4703 93,502 51.7%

November 2812.7 2486 3159 84,380 34.8%

December 2917.2 2404 3753 90,432 41.3%

ANNUAL TOTALS 2804.23 2128 4703 1,023,870


2.1.2 Maximum Raw Water Flow:

The maximum raw water flow in 2017 was 4703 m³ (Oct 11), followed by a

second monthly maximum of 4029 m3 (April 25). Both these maximum

month flows are attributed to a Town hydrant flushing week occurring. This

is relevant as the PTTW maximum of 9090 m3 can be exceeded during water

distribution maintenance work times.

A more realistic daily maximum during a typical operating could easily be

estimated in the 3200 to 3400 m3 range (or approx. 37% of the PTTW).

2.2 Service Water (Treated Discharged Water)

Below are the Treated Water monthly volumes, noting the high daily flow volume in

April and October can be attributed to Hydrant Flushing week(s). Elevated treated

water flows can also be associated with watermain breaks, such as on Dec 14

(3497 m3 due to break outside WTP).

Table TW-1

2017 Treated Water Volumes Discharged to Town

Average

Daily Flow (m3)

Minimum Daily Flow

(m3)

Maximum Daily Flow

(m3)

TOTAL FLOW (m3)

January 2380.9 1978 2788 73,809

February 2454.2 2185 2720 68,718

March 2491.2 2317 2689 77,228

April 2585.7 2125 4105 77,570

May 2495.2 2066 2938 77,351

June 2835.5 2352 3440 85,066

July 2795.9 2195 3366 85,066

August 2836.8 2146 3432 87,940

September 2886.3 2255 3493 86,589

October 2830.3 2356 4813 87,738

November 2568.3 2313 2825 77,048

December 2680.5 2231 3497 83,094

ANNUAL TOTALS 2653.39 1978 4813 967,217


2.2.1 Average Daily Service Water Flow: The daily average service water flow was 2,653 m³ in 2017. While this may have represented a significant decrease from 2015 (3,057 m³), it was of little change from 2016 (2657 m3).

2.2.3 Service Water Discharge: In 2017 a total of 967,217 m3 was discharged to the Town. A total of 972,383 m3 was realized in 2016; 1,115,473 m³ total in 2016.

1.3 Plant process water During 2017, process residue wastewater was being treated from the two settling tanks as part of the completed Phase I portion of the system. Facility operators are becoming more familiar with the system’s operations and some polymer dosing optimization does occur. Operators are also trying to enhance the process by determining an ideal sludge density for the geo-tube to handle under automated operations. Development of automated settling tank siphon operations continue, with the Phase I now partially network linked to SCADA. During settling tank cleaning, the accumulated sludge that is not removed regularly through mechanical means (scrapers and siphons) also needs to be dealt with prior to it going septic. Currently this form of settling sludge is transported off-site for direct disposal at the lagoons. It is anticipated with Phase II development, this type sludge can also be treated on-site, possibly using dilution in the backwash wastewater equalization tanks. Backwash optimization trials were undertaken in 2017, and are currently on-going prior to Phase II implementation. The effort is to create longer filter runs, lower backwash water volumes, and a more uniform sludge density. Through upgrades to the backwash control panel instrumentation, varying backwash flows can now occur routinely to help optimize this process. Air scour is now being exclusively used to prep the filter bed before actual washing occurs. This is now being used exclusively, replacing surface wash operations that were less efficient and generated unnecessary wastewater. As operators become more familiar with this operation, further optimization can be realized. The initial Phase II completion date for Dec 31, 2016 had been extended until July 2017 to allow the municipality to upgrade the filters and associated backwashing methods. A further extension was awarded with a new


implementation date by July 31, 2018, in part to coincide with the facility’s main 600V MCC replacement project timeline.

2.3.1 Waste Volumes

In the 2017 calendar year, a total volume of 13,572 m3 was directed through the Phase I residue treatment system. This was up slightly from the 12,267 m3 in 2016. Many factors could have contributed to this increase, particularly the Raw Water conditions needed to be addressed during heavy rainfall and runoff times (the more solids in the source water directly equates to the amount of solids generated in the settling tank sludge). One (1) outside geo-tube bag was put back into service after overwintering on April 19, 2017. It was taken back out of service on April 24 (due to TSS counts) and allowed to start the drying process. On June 20 bag removal occurred. Approximately 9367 m3 of settling tank sludge was directed to it, with ~ 212 metric tonnes of dry sludge taken to landfill. Efforts were made during the Spring of 2017 to try and direct as much sludge to the greenhouse bag as possible. This involved feeding it on a rotating basis, allowing sludge compaction (and extra dewatering) time to occur. The greenhouse bag was taken out of service on June 02, allowed to dry, and removed on Oct 27, 2017. The greenhouse bag is smaller in size to the outside bags, due to building space restrictions. Approximately 5233 m3 of settling tank sludge was directed to it, with ~ 188 metric tonnes of dry sludge taken to landfill. The second outside bag was predominantly used during the summer and fall months. It was taken out of service Nov 02, 2017 as a result of a bag tear. At the time it had 6982 m3 of sludge directed to it. It is being allowed to dry overwinter, and in all likelihood removed in the spring. The greenhouse bag was installed and put into service on Dec 09, 2017. By year end, it had just under 1000 m3 directed to it. It needs to be noted that in 2017, approximately 9155 m3 of backwash wastewater was generated, still currently being directly discharged back to the river. While it is anticipated much of this volume can be decanted off, there still will a significant additional sludge volume directed to the geo-tubes bags with Phase II completion. Bag capacity could become an issue, specifically with the smaller greenhouse bag configuration.


SECTION 3 – SUMMARY OF DRINKING WATER SYSTEM ABILITIES

3.1. Water Treatment Ability The Perth water treatment plant continues to maintain a strong position in

supporting its ability to provide a reliable supply of safe, clean drinking water to its

community. Funding reserves are maintained in case of an operational emergency

or unexpected major breakdown.

3.1.1. Disinfection ability Disinfection of the drinking water is ultimately achieved through two points of

application – primary disinfection – dosed as water enters the clear well and

secondary disinfection – dosed at the treated water discharge point. Both of

these critical treatment processes have redundancy in the pumps as well as

the dosage lines.

Varying raw water conditions require operators to adjust and control

chemical dosages to meet regulations in a cost effective manner.

It should be noted that many factors contribute to the overall disinfection

process, including pre-treatment, coagulation and pH control. Of most

importance is the daily CT calculation. The CT value is the product of the

concentration of a disinfectant and the contact time with the water being

disinfected. WTP operations in 2017 well exceeded the legislated CT

operational requirements, supporting the ability to meet proper disinfection

needs.

Another critical factor for proper disinfection is turbidity. Water with high

turbidity can block the disinfection ability, and one primary reason why

disinfection occurs after filtration. The objective is to maintain filter effluent

turbidity of < 0.300 NTU for 95% of the time. The Perth WTP had only

exceeded the 0.300 target on each filter for less 30 minutes over the entire

year, with a typical daily average of 0.04 NTU being acheived.

3.1.2. Chlorine Dioxide use Chlorine dioxide continues to be generated seasonally on site and plays an

important role in achieving disinfection while mitigating the formation of

chlorine disinfection by-products such as THM’s and HAA’s (see 3.1.1

above). These disinfection by-products are suspected carcinogens and are

commonly formed when high doses of chlorine gas or sodium hypochlorite

react with raw water heavily laden with organic matter. Chlorine dioxide use

is uncommon among water treatment facilities due to chemical cost however

the advantage of a “cleaner” disinfection process with less by-product

formation is worth the extra cost during extreme seasonal water quality


challenges seen in Perth. As well, the renewal of the municipal Drinking

Water License saw the additional sampling requirement of Chlorates and

Chlorites added as a quarterly sampling requirement.

3.1.3. pH adjustment (use of lime) Following the coagulation and disinfection processes, where the pH of the

water is lowered through the addition of chemicals, hydrated lime needs to

be mixed in the clearwell to return the pH to a range of 7.1 to 7.3. This

range is desired in an effort to ensure the water within the distribution system

is close to neutral and thereby not aggressive in the deterioration of the

distribution network as well as homeowner plumbing and fixtures. The Town

of Perth qualified for relief from the legislated lead sampling program in 2011

as a result of few exceedances of the lead maximum allowable

concentration.

3.1.4. Coagulation abilities The water treatment plant employs a high-end coagulant called PAX XL-6 to

aid in the flocculation and sedimentation of suspended solids in water prior

to filtration. Although more expensive than conventional coagulants such as

aluminum sulphate, product usage is reduced and outperforms other less

expensive chemicals at certain critical temperature ranges. Winter months

and the associated cold water temperature and density present the most

difficult conditions for the coagulant to settle the solids. Our new licence

allows for pH enhancement (use of HCl) in situations of high pH or alkalinity

raw water conditions that make floc formation difficult.

3.1.5. Pumping capacity The existing pumping capacity meets the needs of the facility and the water

demand from the drinking water system. The HLPs adequately operate with

the SCADA to supply the Town’s distribution system and maintain sufficient

water pressures. The LLPs operate sufficiently to move enough water

through the facility to meet the demands while maintaining process design

requirements.

In the past, variable speed drives (VSD) were tried to be installed on the

HLP pump motors to allow for possible better efficiency. The existing HLP

pumps and electrical components were not well suited for this purpose, and

created operational issues. It is hoped with the new MCC installation,

another assessment of VSD might occur. At minimum, any future pump

motor replacements should be able to accept VSD operations, and the new

MCC will support this effort.


As mentioned, the existing LLP pumps suffice for the current needs. Should

either of the lower sized LLP be in the need of replacement, a slightly larger

capacity pump could supply a better midrange operating range. The two

existing pumps (~ 60-66 L/s) can typically require 13-16 hours of daily

operation to meet the current water demand.

3.1.6. Computer System There were numerous programming changes and upgrades to the WTP

SCADA (Supervisory Control and Data Acquisition) system, mainly attributed

to continuing facility automation efforts. The majority of the 2017 SCADA

work was directly related to basic LLP automation operations (on/off, alarm

and failsafe shutdowns). Initial start up components for a digital network

system was purchased and will be developed further in upcoming years.

Although the objective of basic unmanned facility LLP operations was

achieved in 2017, there will still need to be more instrumentation and failsafe

devices installed to be even more confident in monitoring and recognizing

potential water quality. A more focused approach to cleaning up redundant

analog signal circuitry, and upgrading to a digital network. As newer

instrumentation is being brought in, the reliance on a digitalized

communications network will become more prominent.

The existing hydro service (and electrical capability within the plant) was

reaching maximum capability, and preliminary work for a complete primary

power MCC was started in late 2017 (to be completed in early 2018). The

digital communications aspect of the new MCC will also provide future

opportunities to monitor equipment and link directly in SCADA programming,

something lacking with the existing 1964 circa unit.

3.2. Water Taking Ability The WTP is operating well within the PTTW limits. The Permit to Take Water

(#5464-6MHL84) authorizes the municipality to take water with maximum volumes

regulated for both litres/min as well as litres per day. This Permit was renewed in

the 2016 year and will expire again in 2026. Raw Water pump capacities

determine these figures (6,360 l/min (106 L/s) flow; and 9,092 m3/day).

The maximum raw water flow in 2017 was 4703 m³ (Oct 11), followed by a second

monthly maximum of 4029 m3 (April 25). Both these maximum month flows are

attributed to a Town hydrant flushing week occurring. This is relevant as the PTTW

maximum can be exceeded during water distribution maintenance work times. A


more realistic daily maximum during a typical operating could easily be estimated in

the 3200 to 3400 m3 range (or approx. 37% of the PTTW).

In 2017, these was no concern with insufficient water quantity amounts. The heavy

rainfall and high waters of 2017 did cause some concern regarding water quality,

however the treatment process was able to handle the situation(s) faced.

3.3. Water Storage Ability The clear well and reservoir were cleaned and inspected in 2016. Additional time

was taken to pay particular attention to the reservoir’s western wall, given this

would be adjacent to any process wastewater Phase II construction, specifically pit

blasting for the equalization tanks. Reservoir valve replacement program was

resumed in 2017, with the access port work of 2017 completed and reservoir

influent valve removed. The reservoir storage capacity appeared to be sufficient to

meet the disinfection contact time needs, as well as providing required water supply

for domestic, industrial, and fire fighting purposes.

The elevated tank had a second communications system installed, with upgraded

transmitters for more reliable signals. Regular maintenance and emergency repairs

occurred within the distribution system including mains, services and hydrants.

3.4. Water Treatment and Distribution Personnel The WTP is a Class III facility. With basic automation, 8 hour shifts can be realized,

but shifts still occur 7 days a week. Automation will start LLP operations prior to the

shift start, and continue after the shift until water supplies are topped up for

overnight. A WTP operator is on-call for immediate response to any WTP

operational alarms, either through remote site communications or an actual site visit

depending on the situation severity. Shifts and duties are rotated amongst two full

time operators and a Lead Hand, one less operator from 2016. The Lead Hand has

WT Level III certification, an operator also with a Level III certification, and the

second operator with a Level II certification.

The Distribution system is a Class 1 facility and is maintained by a Lead Hand and

four operators, who rotate through other departments within the organization. The

Lead Hand possesses a level III certification in distribution and supply. Three (3)

other operators have level II certification, with one operator as an OIT (operator in

training).

Feb 16, 2018 Dave Gibson


Lead Hand – WT and WWT


Table 1 – Summary of Flows January 1, 2017 to December 31, 2017 Perth Water Treatment Plant

PTTW maximum allowable flow rate: 9,090 m3/ day

Raw water (m3)

Discharge (Service)

Water (m3)

Month Monthly Daily

Average Flow

Monthly

Total

Flow

Monthly

Daily

Average

Flow

Monthly

Total

Flow

January 2536.5 78,633 2380.9 73,809

February 2591.0 72,549 2454.2 68,718

March 2619.9 81,218 2491.2 77,228

April 2695.2 80,855 2585.7 77,570

May 2584.3 80,113 2495.2 77,351

June 2964.2 88,927 2835.5 85,066

July 2898.4 89,851 2795.9 85,066

August 2955.1 91,607 2836.8 87,940

September 3060.1 91,803 2886.3 86,589

October 3016.2 93,502 2830.3 87,738

November 2812.7 84,380 2568.3 77,048

December 2917.2 90,432 2680.5 83,094

Year Average 2804.23 85,322.5 2653.39 80,601.4

Year Total 1,023,870 967,217


Table 2 – Historical Average Daily Service Water Flow (m³)

Perth Water Treatment Plant

2017 2016 2015 2014 2013 2012

JAN. 2,381 2,502 2,872 3,211 2,795 2,521,

FEB. 2,454 2,571 3,290 2,980 3,504 2,708

MARCH 2,491 2,455 3,298 3,053 3,664 2,741

APRIL 2,586 2,471 3,157 3,247 3,565 2,698

MAY 2,495 2,931 3,392 3,003 3,187 3,098

JUNE 2,836 2,996 3,002 3,285 2,845 3,109

JULY 2,796 2,954 3,048 3,292 3,034 3,441

AUG. 2,837 3,024 3,015 3,099 3,076 3,137

SEPT. 2,886 2,694 2,979 2,992 2,839 2,962

OCT. 2,830 2,603 2,998 2,901 2,894 2,839

NOV. 2,568 2,372 2,852 2,693 2,916 2,658

DEC. 2,681 2,300 2,784 2,642 3,134 2,578

MAXIMUM 2,886 3,024 3,392 3,292 3,644 2,917

MINIMUM 2,381 2,300 2,784 2,642 2,795 2,155

AVERAGE 2,654 2,656 3,057 3,033 3,119 2,892


Table 3 - 2016 Raw Water Taking Perth Water Treatment Plant - Appendix 1

Day January February March April May June July August September October November December

1 2,128,000 2,633,000 2,518,000 2,311,000 2,562,000 3,026,000 2,398,000 2,901,000 3,123,000 2,484,000 2,773,000 2,922,000

2 2,446,000 2,540,000 2,522,000 2,474,000 2,422,000 2,417,000 2,332,000 2,846,000 3,013,000 2,897,000 2,721,000 2,854,000

3 2,639,000 2,976,000 2,383,000 2,566,000 2,695,000 2,286,000 2,761,000 2,672,000 2,656,000 2,998,000 3,085,000 2,828,000

4 2,700,000 2,325,000 2,645,000 2,506,000 2,548,000 2,358,000 2,839,000 2,756,000 2,735,000 2,906,000 2,735,000 2,804,000

5 2,425,000 2,528,000 2,457,000 2,744,000 2,256,000 2,602,000 3,018,000 2,563,000 2,860,000 3,078,000 2,723,000 2,782,000

6 2,748,000 2,674,000 2,546,000 2,562,000 2,305,000 2,815,000 3,423,000 2,327,000 3,158,000 2,776,000 2,689,000 3,025,000

7 2,393,000 2,425,000 2,974,000 2,575,000 2,289,000 2,766,000 3,221,000 2,459,000 3,152,000 2,538,000 2,695,000 2,846,000

8 2,329,000 2,475,000 2,652,000 2,203,000 2,768,000 3,731,000 2,789,000 2,833,000 2,801,000 2,703,000 2,810,000 2,855,000

9 2,716,000 2,633,000 2,279,000 2,450,000 2,392,000 3,244,000 2,532,000 2,955,000 2,923,000 2,697,000 2,771,000 2,796,000

10 2,437,000 2,896,000 2,750,000 2,513,000 2,403,000 3,152,000 2,836,000 3,184,000 2,836,000 4,477,000 2,736,000 2,669,000

11 2,657,000 2,453,000 2,547,000 2,460,000 2,595,000 2,919,000 2,971,000 2,956,000 3,346,000 4,703,000 2,704,000 3,107,000

12 2,828,000 2,418,000 2,460,000 2,674,000 2,370,000 3,249,000 3,167,000 2,632,000 3,114,000 4,642,000 2,932,000 3,149,000

13 2,688,000 2,613,000 2,375,000 2,413,000 2,438,000 3,742,000 2,677,000 2,777,000 3,226,000 3,998,000 2,837,000 2,948,000

14 2,195,000 2,561,000 2,740,000 2,563,000 2,302,000 3,341,000 3,239,000 3,195,000 3,016,000 2,345,000 2,552,000 3,753,000

15 2,252,000 2,708,000 2,433,000 2,456,000 2,581,000 3,424,000 2,604,000 2,861,000 3,218,000 2,698,000 3,039,000 3,241,000

16 2,820,000 2,742,000 2,910,000 2,287,000 2,504,000 3,111,000 2,607,000 2,789,000 3,069,000 2,941,000 2,795,000 3,368,000

17 2,492,000 2,882,000 2,596,000 2,478,000 3,132,000 2,461,000 3,185,000 2,843,000 3,037,000 3,279,000 2,829,000 3,000,000

18 2,402,000 2,611,000 2,721,000 2,642,000 3,157,000 2,687,000 3,346,000 3,114,000 2,933,000 3,103,000 2,756,000 2,773,000

19 2,733,000 2,260,000 2,667,000 2,661,000 2,651,000 3,342,000 3,292,000 2,937,000 3,364,000 2,967,000 2,609,000 2,931,000

20 2,555,000 2,593,000 2,652,000 2,747,000 2,819,000 3,111,000 3,316,000 2,775,000 3,299,000 2,827,000 3,020,000 3,385,000

21 2,512,000 2,617,000 2,594,000 2,428,000 2,453,000 3,147,000 3,400,000 3,322,000 3,665,000 2,453,000 2,885,000 2,945,000

22 2,272,000 2,420,000 2,638,000 2,352,000 2,310,000 3,035,000 3,050,000 3,447,000 3,207,000 2,969,000 2,804,000 2,999,000

23 2,657,000 2,640,000 2,668,000 2,628,000 2,968,000 2,986,000 2,635,000 3,373,000 3,056,000 2,879,000 2,930,000 2,787,000

24 2,442,000 2,606,000 3,001,000 3,988,000 2,772,000 2,803,000 2,513,000 3,152,000 3,025,000 2,914,000 2,848,000 2,810,000

25 2,601,000 2,426,000 2,533,000 4,029,000 2,735,000 2,551,000 2,769,000 3,280,000 3,238,000 3,005,000 2,486,000 2,404,000

26 2,896,000 2,496,000 2,550,000 3,845,000 2,600,000 2,962,000 2,896,000 2,942,000 3,025,000 2,885,000 3,159,000 2,688,000

27 2,782,000 2,800,000 2,441,000 3,586,000 2,701,000 2,691,000 2,677,000 2,756,000 3,335,000 2,715,000 2,747,000 2,668,000

28 2,406,000 2,598,000 2,887,000 2,624,000 2,767,000 3,352,000 3,119,000 3,411,000 2,876,000 2,575,000 2,821,000 3,133,000

29 2,278,000 2,531,000 2,628,000 2,512,000 2,852,000 2,721,000 3,104,000 2,787,000 2,587,000 2,914,000 2,438,000

30 2,557,000 2,713,000 2,462,000 2,499,000 2,764,000 2,740,000 3,305,000 2,710,000 2,841,000 2,975,000 2,816,000

31 2,647,000 2,835,000 2,607,000 2,778,000 3,140,000 2,622,000 2,708,000

Minimum 2,128,000 2,260,000 2,279,000 2,203,000 2,256,000 2,286,000 2,332,000 2,327,000 2,656,000 2,345,000 2,486,000 2,404,000

Maximum 2,896,000 2,976,000 3,001,000 4,029,000 3,157,000 3,742,000 3,423,000 3,447,000 3,665,000 4,703,000 3,159,000 3,753,000

Average 2,536,548 2,591,036 2,619,935 2,695,167 2,584,290 2,964,233 2,898,419 2,955,065 3,060,100 3,016,194 2,812,667 2,917,161

Monthly

total 78,633,000 72,549,000 81,218,000 80,855,000 80,113,000 88,927,000 89,851,000 91,607,000 91,803,000 93,502,000 84,380,000 90,432,000

Running

Year total 78,633,000 151,182,000 232,400,000 313,255,000 393,368,000 482,295,000 572,146,000 663,753,000 755,556,000 849,058,000 933,438,000 1,023,870,000

Corporation of the Town of Perth Drinking Water System ... · 1.3.2. Water Treatment Subsystem...

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Transcript of Corporation of the Town of Perth Drinking Water System ... · 1.3.2. Water Treatment Subsystem...