chemical grouting of sanitary sewers
DESCRIPTION
Chemical Grouting of Sanitary Sewers. Illinois Section CSWEA Collection System Seminar June 11, 2009 Derek J. Wold, P.E. Baxter & Woodman, Inc. Chemical Grouting of Sanitary Sewers Introduction. Rehabilitation Alternatives Why use Chemical Grout Chemical Grout Overview Specifications - PowerPoint PPT PresentationTRANSCRIPT
Chemical Grouting of Sanitary Chemical Grouting of Sanitary SewersSewers
Illinois Section CSWEAIllinois Section CSWEACollection System Seminar Collection System Seminar
June 11, 2009June 11, 2009
Derek J. Wold, P.E. Derek J. Wold, P.E. Baxter & Woodman, Inc.Baxter & Woodman, Inc.
Chemical Grouting of Sanitary Sewers Introduction
• Rehabilitation Alternatives– Why use Chemical Grout
• Chemical Grout Overview
• Specifications
• Costs
• Case Studies
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers IntroductionSewers Introduction
Purpose of RehabilitationPurpose of Rehabilitation Structural RepairStructural Repair Infiltration / Inflow (I/I) RemovalInfiltration / Inflow (I/I) Removal Extend Service LifeExtend Service Life
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers IntroductionSewers Introduction
RehabilitatioRehabilitation Alternativesn Alternatives Lining (CIPP, Lining (CIPP,
Slip Lining)Slip Lining) Pipe BurstingPipe Bursting Open Cut Open Cut
ReplacementReplacement Chemical Chemical
GroutingGrouting
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers OverviewSewers Overview
Why utilize chemical groutWhy utilize chemical grout Less expensive than other rehabilitation Less expensive than other rehabilitation
methodsmethods Extends service lifeExtends service life Remove I/IRemove I/I
When to use chemical groutWhen to use chemical grout No structural defectsNo structural defects Joint leaks or root intrusionJoint leaks or root intrusion No sagsNo sags
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Mainline Sewer GroutingSewers Mainline Sewer Grouting
Equipment Equipment PackerPacker TV CameraTV Camera GaugesGauges WinchWinch
Types of groutTypes of grout
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
Service Connection and Lateral Service Connection and Lateral GroutingGrouting
Equipment usedEquipment used AccessAccess
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
SpecificationsSpecifications StandardsStandards
Rehabilitation of Sewers ASTM 2304.Rehabilitation of Sewers ASTM 2304. Sealing Sewer Manholes ASTM 2414.Sealing Sewer Manholes ASTM 2414.
SpecificationsSpecifications Preparatory Cleaning and TelevisingPreparatory Cleaning and Televising Grout MaterialGrout Material Joint TestingJoint Testing
3 psi greater than groundwater pressure, or3 psi greater than groundwater pressure, or ½ psi per foot½ psi per foot Maximum of 10 psiMaximum of 10 psi Maximum pressure loss = 1 psi per 15 sec.Maximum pressure loss = 1 psi per 15 sec.
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
SpecificationsSpecifications Joint SealingJoint Sealing
½ gallon per inch diameter½ gallon per inch diameter Pump to “refusal”Pump to “refusal” DocumentationDocumentation
Joint Sealing VerificationJoint Sealing Verification Repeat Joint TestingRepeat Joint Testing
WarrantyWarranty Retest after 3 yearRetest after 3 year
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
SpecificationsSpecifications Service Connection GroutingService Connection Grouting
Test and Seal SpecificationsTest and Seal Specifications 3 gal per connection3 gal per connection
Lateral groutingLateral grouting
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers CostsCosts
MainlineMainline Service TeeService Tee LateralLateral ManholesManholes
Chemical Grouting of Sanitary Chemical Grouting of Sanitary Sewers Sewers
Case StudiesCase Studies Downers Grove Sanitary DistrictDowners Grove Sanitary District
E1-014 Flow BasinE1-014 Flow Basin IM-12A Flow BasinIM-12A Flow Basin
Village of LisleVillage of Lisle
Downers Grove Sanitary District Background
• Special unit of local government• Responsible for wastewater collection and treatment• Operates 237 miles of public sewers• Operates 9 pumping stations• Operates one WWTF rated at 11 MGD• 20 square mile service area• Western suburbs of Chicago, Illinois• 21,062 building connections• Serves approximately 62,000 people
mapmap
Downers Grove Sanitary District35 miles west of Chicago
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
Sewer Rehab Policy – I/I Sewer Rehab Policy – I/I ReductionReduction
Select Target Rehabilitation BasinSelect Target Rehabilitation Basin Develop Criteria / Scoring System based on:Develop Criteria / Scoring System based on:
Frequency of SSOsFrequency of SSOs Frequency of Basement BackupsFrequency of Basement Backups Flow Monitoring DataFlow Monitoring Data System AgeSystem Age
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
Target I/I Rehabilitation BasinTarget I/I Rehabilitation Basin Select I-H-9 Flow Basin as Select I-H-9 Flow Basin as
first target basinfirst target basin 188 Building connections188 Building connections Approx. 8,300 LF of Approx. 8,300 LF of
sewer and 32 manholessewer and 32 manholes Flow Data Flow Data
60 gpm ADF to 1,200 60 gpm ADF to 1,200 gpm peak flowgpm peak flow
Preliminary SSES work and Preliminary SSES work and resultsresults Flood testingFlood testing Smoke testingSmoke testing Small amount of I/I Small amount of I/I
identifiedidentified Inadequate storm drainageInadequate storm drainage
Manhole I-H-9 8/21/02 Rainfall Event
0
200
400
600
800
1000
1200
1400
0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00
Time of Day
Flow
(gpm
) Wet Weather Flow
Dry Weather Flow
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
IH-9 Flow BasinIH-9 Flow Basin Total Cost – Approx $1,500,000Total Cost – Approx $1,500,000
Line 100% of mains - $418,000Line 100% of mains - $418,000 Grout or Replace 100% Manholes - $47,000Grout or Replace 100% Manholes - $47,000 Line or replace 96% Services - $1,013,000Line or replace 96% Services - $1,013,000
ResultsResults I/I reduced by 60-80 percentI/I reduced by 60-80 percent No overflows in I-H-9 flow basinNo overflows in I-H-9 flow basin Unable to produce air tight systemUnable to produce air tight system Impact of I/I Removal on inadequate Impact of I/I Removal on inadequate
storm drainagestorm drainage
Downers Grove Sanitary DistrictFlow Meter Data Summary - 1-H-9 Flow Basin
I/I Comparison2.
852.
781.
033.
145.
396.
175.
111.
871.
033.
544.
861.
384.
804.
162.
171.
170.
902.
860.
811.
490.
841.
343.
153.
890.
625.
191.
200.
954.
944.
681.
097.
315.
443.
56
1.45
1.42
2.86
2.17
4.05
3.14
2.21
3.02
0.97
0.69
4.01
1.15
3.02
2.42
3.92
0.31 0.39 0.
530.
25 0.37
1.19
3.84 4.
111.
432.
182.
581.
300.
950.
82
0.42
0.38
2.10
3.00
1.10
0.70
3.20
3.70
2.20
0.30
4.20 4.
401.
400.
942.
382.
101.
700.
801.
302.
300.
260.
900.
373.
203.
631.
161.
991.
442.
050.
651.
061.
892.
191.
82
1.34
2.31
2.22
2.56
2.61
1.88
1.90
1.77
1.81
1.47
1.47
2.71
0
1
2
3
4
5
6
7
8
3/8/
1998
3/31
/199
8
4/20
/199
8
2/24
/200
1
4/15
/200
1
6/5/
2001
8/25
/200
1
9/23
/200
1
4/8/
2002
5/11
/200
2
7/9/
2002
8/22
/200
2
3/28
/200
3
5/5/
2003
7/15
/200
3
9/1/
2003
11/4
/200
3
5/30
/200
4
8/3/
2004
11/2
7/20
04
1/13
/200
5
5/13
/200
5
9/24
/200
5
1/13
/200
6
4/30
/200
6
6/26
/200
6
8/28
/200
6
9/13
/200
6
10/3
/200
6
11/1
0/20
06
7/18
/200
7
8/19
/200
7
10/1
/200
7
12/1
1/20
07
5/2/
2008
5/26
/200
8
6/13
/200
8
Rainfall Event
I/I N
um
ber
Completion of Main Sewer Lining
Start of Service Sewer Lining
Pre-Lining Post-LiningPre-Lining
Main Average
Post-Lining Service Average
Completion of Service Sewer Lining
Post-Lining Main Average
Pre-Lining Post-Lining
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
E-1-014 Flow BasinE-1-014 Flow Basin Basin CharacteristicsBasin Characteristics
8,021 LF of 8-inch VCP 8,021 LF of 8-inch VCP sewersewer
165 services165 services 28 manholes28 manholes
Flow dataFlow data ADF = 25 gpmADF = 25 gpm Peak Flow = 750 gpmPeak Flow = 750 gpm
WetlandsWetlands
E-1-014 10/2/05 Rainfall Event
0
100
200
300
400
500
600
700
800
0:00 4:00 8:00 12:00 16:00 20:00 0:00 4:00 8:00 12:00 16:00 20:00
Time of Day
Flow
(gpm
) Wet Weather Flow
Dry Weather Flow
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
E-1-014 Flow BasinE-1-014 Flow Basin Grout 100% of mains Grout 100% of mains
and manholesand manholes ResultsResults
Peak flow reduction of Peak flow reduction of 45%45%
CostsCosts $300,000$300,000
Downers Grove Sanitary Downers Grove Sanitary DistrictDistrict
I-M-012A Flow BasinI-M-012A Flow Basin Basin CharacteristicsBasin Characteristics
9,442 LF of sewer9,442 LF of sewer 211 services211 services 34 manholes34 manholes
Flow dataFlow data 50 gpm to 1200 gpm50 gpm to 1200 gpm
Compliance Commitment Agreement with Compliance Commitment Agreement with IEPAIEPA
Village of LisleVillage of LisleBeau Bien AreaBeau Bien Area
Project AreaProject Area 6,314 LF of 8-inch sewer6,314 LF of 8-inch sewer 97 services97 services
RehabilitationRehabilitation 3,314 LF of grouting3,314 LF of grouting 3,080 LF of CIPP3,080 LF of CIPP 88 services grouted88 services grouted 9 laterals lined9 laterals lined
CostsCosts
Questions?Questions?
Derek J. Wold, P.E.Derek J. Wold, P.E. Baxter & Woodman, Inc.Baxter & Woodman, Inc. 708-478-2090708-478-2090 [email protected]@baxterwoodman.com