Water Line Leak Loc Proj Final Report
CITY OF SANDY
ELECTRONIC DOCUMENT ARCmv NG
COVER SHEET
FOLDER STRUCTURE
0.tht )'( - \1\/ ()~ ~ (department). p I _L
Wakr- L-1V\e Leak Loc-.afcOvL ~eC{
DOCUMENT NAME: W 1-
r i Vl &J( <2 . rn.;t-
DATE RANGE:
X 2006-2010
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1995-2000
1990-1995
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1970-1975
Before 1975
RETENTION:
None
1 year
2 years
5 years
1 0 years
20 years
X Permanent
DISPOSITION OF DOCUMENT AFTER SCANNING:
Return to Department
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Recycle
G:\Forms All Departments\Archive Storage Box Index and Plan Box Index\EIectronic rchiving Cover Sheet.doc
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.......... ..... ....... ..... ............... II ....... ... II ... 1.., ..... ... II.. ... ..... ......... ... .. ...... ..... ... ......
Water Line Leak Locatio Project
Final Report
For
City of Sandy
Sandy, OR
... ....... ..... ..... ..... II ... ......... ..... II ..... ..... ....... ... ......... ........ .... ... II .... .......... ....... ....
Prepared by:
Utility Services Associates
10013 Martin Luther King Jr. Way So h
Seattle, ,Washington 98178
Project Date:
07/23/99
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"'i",,. CO"S6,,,""o,. (~ "j."II""'~
TABLE OF CONTE TS
EXECUTIVE SUMMA Y
PROJECT OBSERV A TI
SURVEY REVIEW
AREA SURVEY REPO TS
LEAK REPORTS
CONCLUSION
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11-800-621-9292 · Main Office (206) 725-3441
Utility Services As ciates
10013 Martin Luther King . Way So.
Seattle, Washington 9 178
Water Conservation Con ultants
July 30, 1999
City of Sandy
Attn: Mike Walker
39250 Pioneer Blvd
Sandy, OR 97055
Dear Mike:
Utility Services Associates is pleased to submit the encl sed Final Report on leak
detection services recently completed.
A total of approximately 2.8 miles have been surveyed incl ding all intersecting lines.
one (1) leaks were located with a total of approximately 8.08 hours spent on this
project. Water 1055 due to leakage was found to be ap roximately 14,400 G.P.D.
Details of this information are enclosed.
As you review this Final Report, please pay close attentio to the Field Technician's
remarks and field observations in the Project Observation se tion of this report. These
may assist you in determining the best course of action regar ing specific leaks.
Page one of our Leak Report section contains a legend of nformation detailed in the
leak diagram. We hope you will also find the Leak Rep rt Summary and graph of
leakage helpful in your water conservation efforts.
The leak detection survey is productive since we pinpoi ted leakage that, when
repaired, can reduce your water loss, saving the City of Sa dy dollars now and in the
future. We appreciate your confidence in Utility Services As ociates. If you have any
questions. call us toll free at (800) 621-9292.
Sincerely.
(Zqy;
Rob Meston
Manager
· FAX (206) 725-5~32
· Web Site: www.leaks.com
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I EXECUTIVE SUMM~ ~y
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Summary of Survey and Pinpointing Report
Client: City of Sandy, OR
Period Covered: 07/23/99
General Area Covered: Various selected areas.
Distance Surveyed :
Time Spent Surveying :
Points Surveyed
Hydrants
Valves
SeIVices
Other
Total
NUMBER TIME SPENT TOTAL.
LEAK TYPE of LEAKS PINPOINT- GALLONS
ING (hours:) PER MIN
MAIN LINE
VALVE
HYDRANT
METER
CURB STOP
SERVICE LINE
SERVICE CONN
OTHER
TOTALS 1
0.75
0.75
SURVEY DA TA
15200.0 feet,
3.08 hours
2.8 miles
Date: 07/23/99
To'r AL ANNUAL WATER LOSS
(Colmu1a: Ieak.GPM x mWhour x boon/day x dayllyear)
5,256,000.0 GALLONS
18
Access Points R~ quirin2 further investi2ation
(points that are r~lwncd to for pinpointina or elimination)
Leak sounds on: Valves 3
Hydrants 0
SelVices 1
Otber 0
Total 4
24
29
72
PINPOINTING DA TA
TOTAL.
GALLONS PER
nAY
LARGEST. LARGES T.
GALLONS GALLON S PER
PER MIN DA V
10.0
14400.0
10.0
10.00
14400
n.a.
I Sites Investigated for Pinpointing
I Other Time Spent on Project (includes pinpointing false leak sounds)
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SMALLEST. SMALLEST.
GALLONS GALLONS PER
PER MIN DA Y
AVERAGE
LEAK SIZE
GPM
] 4400.0
10.00
14400.00
10.0
n.a
n.a
n.a
10.0
4
4.25 brs.
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ORlOS28 Job' 47S4
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I LEAK DETECTION/BENEFIT ANAL YSIS
I A. TOTAL WATER PRODUCED OR DELIVERED TO ISTRIBUTION
SYSTEM IN GALLONS PER YEAR (ESTIMATE IF XACT FIGURES
I ARE NOT AVAILABLE GPY
I 8. YEARL Y COST OF SYSTEM OPERATION INCLUD NG COSTS FOR
LABOR + MAINTENANCE + INTEREST + INSURA CE + PUMPING +
TREATING + DEPRECIATION + BilliNG, ETC. YEAR
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I C. ESTIMA TED WA TER PRODUCTION COST PER 1 00 GALLONS
(8% A% 1000) $ /1 000 GAL
I D. TOTAL WATER SALES AND OTHER WATER USE N GALLONS
PER YEAR. TO ESTIMATE USE (100 GPD PER P RSON +
I INDUSTRIAL, COMMERCIAL, PARKS. FIRE, STRE T
CLEANING, ETC. GPY
I E. TOTAL INACCOUNTED FOR WATER (A-D) GPY
I F. PERCENT UNACCOUNTED FOR (E% A x 100) %
I G. ESTIMATE OF LEAKAGE (0.8 x E) GPY
I H. COST TO PRODUCE WATER LOST TO LEAKAGE $ NEAR
I I. ESTIMA TED LEAK DETECTIO'N SURVEY COST SA ED
ON MILES OF MAIN* $
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J. YEARL Y BENEFITS AFTER LEAKAGE REPAIR
I (H-I x 0.75) $ YEAR
I *Cost of estimate for Leak Detection project supplied by Uti ity Services Associates is
based on the number of miles of distribution main to be co ered.
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PROJECT OBSERVATIONS
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Project Observations:
On July 23, 1999, Utility Services Associates completed a compreh nsive water leak detection project
for the City of Sandy, OR. The areas encompassed in this survey w re various selected older water
lines n the system. One leak was pinpointed.
Please note the following observations:
Correlations indicate two leaks at the LDS church on Bluff Road. ne leak is on the service line near
the edge of the road. The second leak is at the service connectio . Ground microphone utilized in
the area detected audible leak noise at the service connection. D e to very loud leak noise in this
area, we could not verify the exact location of this service line eak. Replacement of this entire
service line may be warranted.
One area of concern was Vista Loop Road. This small steel line xtends approximately 1000' and
runs under Highway 26. There are tow meters being served on this transmission line. An abundance
of leak noise was detected on the south end. Correlations were u successful. Providing additional
access points just north of the highway would greatly aid future leak detection projects to pinpoint the
exact location of this leak.
We wish to thank all parties involved especially Martin and we look orward to the being of service in
the future.
Jeff Ruppel
Utility Services Associates
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I SURVEY REVIEV V
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LEAK SURVEY REVIE
(Water Distribution Lines)
On 07/23/99, Utility Services Associates provided a I ak survey for the City of
Sandy. We utilized the latest in leak detection technolog available. We employed
extremely sensitive sound amplification instruments for t e survey and a computer
based correlator for leak pinpointing whenever possible. 0 r leak consultant, Jeff used
and appreciated the information provided, by Martin, to expedite and provide an
accurate survey.
The survey was accomplished in the following steps:
1. The first step in our survey was to review the distributi n maps of your system for
familiarization of the pipe network and availabl appurtenances (valves,
hydrants, etc.) to be used for contact points.
2. As the leak survey progressed, we determined the dis ances that even quiet leak
type sounds traveled in various pipe materials, pipe si es, and pressure zones in
each area of your system. This was done by slightl turning on fire hydrants,
hose bibs, etc., creating a simulated quiet leak sou d. Appurtenances in that
area were then checked with a sound amplification in trument to see how far the
simulated leak sounds traveled, thus determining h w often we would make
contact with appurtenances in a given section of you water distribution system.
However, contact was made with pipe appurtenances t intervals no greater than
350 feet where contact points were available and ac essible. This allowed for
even more quiet leaks to be located.
3. We then conducted a comprehensive survey by maki g physical contact with all
available main line appurtenances (valves, hydra ts, etc.) and necessary
customer services. Utility Services Associates us d a sonic leak detection
instrument designed for this purpose.
4. When normal contact points were not available or co Id not be created within a
reasonable distance, we will make an attempt to us a sonic ground listening
instrument to make physical ground contact at interv Is no greater than 6 feet
directly over the pipe. If conditions did not allow this procedure our Field
Technicians advised Client at time of project and ill detail in the executive
remarks. (Ground listening devices are employe when ground cover is
pavement, cement or similar hard surface.) Direct ntact to the main line at
intervals outlined in Preparation for Service will re ult in the most thorough
survey.
5. When ground cover is not a hard surface, and nor al contact points are not
available, we will make an attempt to use probe rod or a specially designed
sounding plate at 6-foot intervals. A sound amplificati n instrument with 3VG, or
greater, transducer would be employed in conjunction ith this equipment directly
over the pipe. If conditions did not allow this proced re our Field Technicians
advised Client at time of project and will detail in the xecutive remarks. Direct
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contact to the main line at intervals outlined in Prepar tion for Service will result
in the most thorough survey.
6. A detailed report of decibel levels at suspected I ak sound locations and
observations were compiled during the survey for re nvestigation and possible
pinpointing at a later time. (This reinvestigation in reased the speed of the
survey and eliminated correlating on most false leak s unds.)
7. All indications of leaks found during the survey were v rified a second time, after
which the leaks were pinpointed with a computer bas d sound correlator when
possible. Pinpointing leak locations through interpr tation of sound intensity,
either by ear, decibel metering, or other like methods as not used when contact
points were available for use with the correlator. owever, ground listening
devises were used as a quick double check on pinpoin ed leaks.
8. The equipment used did not normally require valv s to be operated during
surveying and pinpointing. However, on occasion, services or valves were
operated to eliminate service draw noises or to change velocity noise.
9. The correlator equipment used had the capability to pr mpt the operator to input
the variables when different pipe sizes and/or pipe ma erial were encountered in
the same span to be investigated. This is necessary to insure accuracy of results
based on the automatic computation of the correct I ak sound velocity in leak
pinpointing operations. Our correlators have the cap bility of correlating up to
four various pipe sizes and types at one time in a given space. To insure
effective performance in all field environments encou tered in your distribution
system (i.e. traffic noise, draw, pump operation, i dustrial noise, etc.), the
correlator equipment provides 12 multi-range High an Low Pass filters. These
filters provide digitally controlled variable band pass ilters between 72Hz and
7.1 Hz, providing up to 53 selectable filter ranges, full perating frequency range
(all pass): 10Hz-20kHz.
10. We offered a daily report, which included leak locations and estimated GPM loss.
11. Whenever your Utility repaired any leaks detected by tility Services Associates
prior to completion of the field work, we gave your Util ty the option to have that
section of the system re-surveyed to be sure no very quiet leaks were missed
due to an over powering noisy leak sound.
Utility Services Associates furnished a trained field t chnician, leak detection
instruments, equipment and tools to complete the survey and leak pinpointing as
outlined in our proposal. After reviewing all records relati g to this project we feel
certain that we have performed our best effort to pinpoint all existing leaks, within the
areas of the water system we surveyed.
We strongly recommend that your Utility maintain sam type of on-going leak
detection program. Only through a continuing leak detectio program can your Utility
expect to keep the incidence of leakage under control. Suc a program will definitely
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prevent future leak losses from becoming a major co tributor to the system's
unaccounted for water losses.
In our effort to provide the most comprehensive service ossible. we requested in
advance to have your personnel prepare the areas to be su eyed by taking measures
to ensure that the majority of main line valves were accessi Ie. Efforts were made in
this advance preparation. This was greatly appreciated.
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AREA SURVEY REP()RTS
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AREA SURVEY REPORT
Remarks
Contact
I points
11
Service!~ 11
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2. 38336 Hood St
3. 16485 Bluff Rd
Service
Valve
Utility Services Assoc.
div. Western Utilities Supply Company
c
Date 07/23/99
General area Park Street
Other
Park Street & Park Street & 2000
Straus Avenue . . . Sandy High School
4.
5.
6.
7.
8.
9.
2.
3.
2800
""
Total miles
Intersecting Lines surveyed
feet
0.9
4800
Hydrants
8 Valves
Bluff Road &
Hood Street
Bluff Road &
· · Bell Street
Start time 8:45 am End time 1 0:00 am Total minutes 75
1 Park St & Scales Ave Valve 20 Services
Other
20
20
Total
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3
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1 PRV in area/cannot be shut down
Technician JR
Job # 4754
Survey page 1
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AREA SURVEY REPORT
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Remarks
Utility Services Assoc.
diVe Western Utl7ities Supply Company
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Date 07/23/99
General area Park Street
I Contact
I points
Bluff Road & Bluff Road & 3500
Bell Street . .. Andrews Street
Hydrants
Valves
7
7
Service!
12
Other
1
Bluff Road &
Andrews Street
End of line on Bluff Road
2000
Bluff Road &
Kelso Road
End of Shalimar Avenue
1200
Intersecting Lihes surveyed
\..
Total miles
6700
1.3
feet
Start time
10:00 am
End time 10:50 am
Total minutes
50
Location/Address Access Ppint DB Lvi Hydrants
1 Bluff Rd & Bell St Valve 15 Services
2.
3.
Other
Total
4.
5.
6.
7.
8.
9.
Technician JR
Job # 4754
1
2.
3.
\.
Survey page 2
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AREA SURVEY REPORT
Remarks
Utility Services Assoc.
diVe Western Utilities Supply Company
\.
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Date 07/23/99
General area Meinig Avenue
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Contact
points
Hydrants
Valves
3
6
Service!
6
Other
o
1'IImltlll'llltllllllllllllll1\111_illlrlit"1I141111i11IlJIiilfil,C!lJB
Pleasant Street & Scenic Street & 1200
Meinig Avenue . . . . Meinig Avenue
Vista Loop Road
Under Highway 26
1000
Langensand raod &
Gary Street
End of Langensand Road
1500
Intersecting Lines surveyed
Total miles
0.7
feet
3700
Start time 2:20 pm End time 3:20 pm Total minutes
Location/Address Access Point DB Lvi Hydrants
Services
60
1
2.
3.
Other
Total
4.
5.
6.
7.
8.
9.
Technician JR
Job # 4754
.t~lt%j~ftf]1t~i~liUi~1Iilii~~1~!t~m~~~~il1~t~1~jf.ifit~H~~Migli~if~t'lilil.imi~1%j~~~ii*~!~ii~~~r*~i~~1i~~f~tt~!1~~i~1tmii~~i11ltt~~m~f~riili~fflfllt~m1i!:
1
2.
3.
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Survey page 3
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I LEAK REPORTS
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Leak Report Diagram
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Main
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Meter
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Final Leak Report Summary
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Main Line
Valves
Hydrant
Meter
Curbstop
Service Line
Service Connection
Other
Average GPM
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10
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NUluber ofL aks
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2
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1
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Water Line
Hydrant
Valve
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10
Average 9
Leak Rate
(GPM) 7
6
S
4
3
2
0
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j~~1 ~i~~~~~i~~~~~~i~1~~~~~~~
::K:: ~1~~~::~I~~~~&~m:::::1
~;~~" ~~mi~k~~~~l~t~
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LEAK REPORT
Utility Services Assoc.
Repair Date:
Remarks
dive Western Utilities Supply Company
Date 07/23/99
Location
LOS Church & Bluff Road
Remarks
Multiple setups/Possible 2nd leak @
service connection. Ground microphone
detected leak noise only @ service
connection. CAUTIONI
\..
Computerized
Corr.lator R..ult.
#1
#2 #3 #4 #5 #6
GPM's
leak Type
SERVICE LINE
Time spent pinpointing
45 minutes
Leak Site Marked IYes I
Cover Type:
Asphalt
Correlation Scan Time
20Z 20Z
#7 #8 #9 #10 #11 #12
20
20
20
Band Pass Filter Setting
6
7
8
7
7
o
Correlated Point Height
7
13
10
11
8 · 0
39.0 39.0 37.1 39.0 39.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Footage from " A"
Leak #
1
Estimated GPM
10.00
Lea k Classification II
Note:
Map not to scale
~
. I CAUTION:
................. · . ~:. possible 2nd
~~~~>>~ 43 of .
1-1W ~:. A~' leak @ service
III II;' '. s,tof connection
...............-:-:;a....... Lea1'lng 3 ·
:::.:.:.:::::.::..:::::::::::.:.: ~" 6" I R P
fro~ "A" ... X .
· "A"
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Water loss
(this leak, in gallons)
DAIL Y
WEEKL Y
MONTHL Y
Technician
Job #
Page
14,400
100,800
446,400
Location
of Leak
JR
4754
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I CONCLUSION
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11-800-621-9292 · Main Office (206) 725-3441
Utility Services Ass ciates
10013 Martin Luther King J . Way So.
Seattle, Washington 9 178
Water Conservation Con ultants
LEAK SURVEY CONCLU ION
Our thanks to Mike Walker and all persons involved with thi project for their assistance in
gathering all the necessary paperwork and personnel t create. with Utility Services
Associates, a mutually beneficial leak detection project.
With this survey you have demonstrated concern for
conservation.
rudent water utilization and
Capitalizing on the most advanced leak detection tech ology available today, Utility
Services Associates has successfully completed this leak etection Survey. The contents
of this Final Report provide the City of Sandy with a per anent record of the activities
performed to complete a leak Survey along with the results chieved.
An important characteristic of this leak Report is that the facts contained herein can be
used in formulating a database for decision making regardi g: the need for possible future
meter programs, rehabilitation and pipe line replacement. nd/or the investigation of new
water sources, etc. These types of decisions, regarding yo r utilization of water, now can
be predicated more on facts rather than supposition or conje ture.
Prompt repair of any leaks reported provide an immediate b nefit to the Water Department.
which includes recovery of most water revenue and water co servation, etc.
Having achieved these results, we recommend that you cont nue to set up the infrastructure
necessary to continue investigating leakage in the water distribution system.
Implementation of anyon-going leak survey program will en ure that leak losses are kept to
a minimum, and the added enhancement of saving costs for mergency call outs.
Utility Services Associates is proud tq have served the Cit of Sandy in this way and we
wish to thank you for your substantial assistance and coope ation in this project.
If you, or your people, have any questions regarding this F nal Report, please feel free to
call us at (800) 621-9292 or (206)725-3441.
Best Regards,
~
Rob Maston
Manager
· FAX (206) 725- 932 · Web Site: www.leaks.com