Alternative Methods to Reducing Infiltration and Inflow ......Sanipor Flood Grouting April 2003...
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Alternative Methods to Reducing Infiltration and Inflow into Sanitary Sewer Laterals Ed Kelly Storm Water Control Services, LLC
Transcript of Alternative Methods to Reducing Infiltration and Inflow ......Sanipor Flood Grouting April 2003...
Alternative Methods to Reducing Infiltration and Inflow into Sanitary Sewer Laterals
Ed Kelly
Storm Water Control
Services, LLC
Ed Kelly Storm Water Control Services, LLC 8 years as Public Utility Employee (City of
Cleveland & NEORSD), 30 years with Consulting Engineers, 2 years as a Storm Water/Waste Water Utility Contractor
Author of Water Environment Federation, Chapter 5, Manual of Practice, Storm Water Infiltration/Inflow Source Detection
Has Provided over 20 OEPA Contact Hour Presentations on I/I Identification and Removal
Present Owner and Manager of Storm Water Control Services, LLC
Determine Reasons Political or Regulatory?
Is the Fix in the Storm or Sanitary Lateral or Both?
Storm Water Deficient Laterals Can Affect Residential Properties
What are the Causes
of This Flooding?
Uncontrolled Storm Water From a Storm Lateral Can Lead to This !
The Storm Water That
Used To Go Here May Now Be Going
Here
First, Determine the Extent of The Problem Using Flow Data
Site 4 - Manhole 15 - Southwest Portion of the Village
0.00
0.25
0.50
0.75
1.00
1.25
1.50
2/5
/04 1
2:0
0 A
M
2/5
/04 4
:00 A
M
2/5
/04 8
:00 A
M
2/5
/04 1
2:0
0 P
M
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:00 P
M
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/04 8
:00 P
M
2/6
/04 1
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0 A
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2/6
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:00 A
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2/6
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0 A
M
FL
OW
(m
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)
0
0.01
0.02
0.03
0.04
0.05
0.06
RA
IN (
in.)
Site 1 - Manhole 25 - Church and Madison
0.00
0.25
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0.75
1.00
1.25
1.50
2/5
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2:0
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2:0
0 A
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FL
OW
(m
gd
)
0
0.01
0.02
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0.05
0.06
RA
IN (
in.)
Then, Investigate Public System Including Manholes !
How Did You Estimate Manhole Leaks without Water?
What
Will Your
Remedy
Be?
Smoke Testing
Inaccurate Interpretations can Lead
to Inaccurate Results ! Did you cause
the Homeowner to Expend Finances
all the while the Storm Sewer was
deficient !
Comparison of Smoke Testing and Dyed Water Testing
1. One Area with Splashed Downspouts
2. One Area with Downspouts Connected to Curb
3. One Area with Downspouts Connected to Storm
Sewers
Smoke/Dye Testing Comparison 2003
26 - Dye Test Results! 0 - Smoke Test Results!
Which is more Reliable, Quantifiable, Smoke or Dyed
Water Testing ?
Examples of Types of Leaks Dyed Water Testing Found, Smoke Testing Missed !
Public Sewer Dyed Water Testing What’s Broke and What Do You Fix?
Example of Dyed Water Testing of Storm Sewer
What About Mainline Sanitary Sewer in Easements ?
Trenchwater
Well
Monitor
Installation
Results
Trench Water Can Add to The Causes Public Sewer Issues
Remember What’s Broke and Consider What You Should Fix !
Rehab or Replace
Sanitary Lateral ?
Fix the Leaking
Storm?
Excavation and Replacement
Cured In Place Lining
Sliplining Chemical Grouting
Spot Repairs
Public Sewer Rehabilitation Methods
Pipe Bursting
Is the Storm Lateral Exfiltrating or is the Sanitary Lateral Infiltrating, or Do Both
Conditions Exist?
Explain Ownership and Areas of Responsibility
Range of defects: From minor (cracks allowing infiltration) to severe
requiring immediate attention (collapsed pipes)
Main causes of defects: Soil movements, ground settlement over time Corrosion or encrustation Tree root intrusion into pipe Improper lateral construction practices (“break-
ins”) Improper excavation of other utilities (open cut,
HDD installations) Lack of maintenance
Sewer Laterals Are Often in Poor Condition
Private Property Source Removal Plan Fail to Plan, Plan to Fail !
Develop Private Property Source Removal Program
Gather all Decision Makers in a Room and Determine Acceptable Solutions
Nobody Gets in or out until All Agree on Fix(s)
Then and Only Then Test Private Structures
Next, Decide on How You Will Notify Homeowners After You Find Improper
Connections
Friday, May 27, 2005
Cleveland Plain Dealer
Not a Good Public
Education Program !
Plan How You will Provide Public Education to Residents
Describe Proper Drainage
Explain What Can Occur with Uncontrolled Storm Water
Private Property Sewer System
Are Illegal Connections the Problem?
Assumption is When Downspout Pipes Go into the Ground, This Could be an “Illegal Connection” ?
However What Other Examples Exist that can Contribute to Storm Water to the Sanitary Sewer?
Is the Foundation Drain the Problem?
New House Foundation With Drain Tiles
Installed
Storm Laterals the Problem?
Loose Soil and Open Joints Cause Infiltration/Exfiltration
Lateral Develops Sag and Deterioration continues
Sag Allows Exfiltration of Storm Water To Foundation Drain
Are Roots the Problem in Either Storm or Sanitary Laterals?
Blocked or Collapsed Storm Pipes can Cause leaks of Storm Water to Basements, Sump Pumps or Sanitary Sewers
How about Debris in Gutters?
Clogs Outlet and Contributes to
Uncontrolled Storm Water
What About These Splashed Downspouts?
Home With Inactive Sump Pump
Overactive Sump Pumps Can Indicate a Problem Exists
Problem: Sump Runs Continually After Rain
Now Add the Rain !
What if Sump Pumps Discharge to Sanitary Sewer?
Testing Downspouts and Area Drains
Rainfall Simulation
Results Indicate Leaks, Not Direct Connections
Testing The Lateral Trench
Leaks are Observed by CCTV
Camera in Main Sewer at
Lateral Discharge Point
What is Your Criteria for Rainfall Simulation or Testing Private Property
Structures ? 30-Minute 1-Hour 2-Hour
Rain
fall
Flow
Rate Volume
Rain
fall
Flow
Rate Volume
Rain
fall
Flow
Rate Volume
in gal/min gal in
gal/mi
n gal in
gal/mi
n gal
2-Year Storm 1.00 21 623 1.27 13 792 1.57 8 979
5-Year Storm 1.24 26 773 1.57 16 979 1.94 10 1209
10-Year Storm 1.43 30 891 1.81 19 1128 2.24 12 1396
25-Year Storm 1.72 36 1072 2.18 23 1359 2.69 14 1677
How Much Water is Your Contractor
Using in His Testing??
NOTE: The flow rate in GPM assumes a roof with a 1000
square foot surface area
Here’s What Can Happen at Houses with No Gutters or Downspouts
Optional Remedies
Redirect Storm Downspouts and Storm Lateral
Install Sump Pump and Reroute Foundation Drains
Grout or Line Sanitary Lateral
Replace Foundation Drains/Lateral
$250-$750 Dependent on Extent of Piping
$3500 + Dependent on Extent of Piping
$1500-$3000 Dependent on Length of Line
$2500-$15,000
What about Standpipes?
Back Flow Preventer?
Storm Water Redirection
Storm Water is Redirected to Curb or Safe Area To Drain
Downspout Redirection
Standard Splash Block Type
Rain Distributor
Using Methods for Intercepting Uncontrolled Storm Water
Planning Downspout Redirection
Implementing the “Fix” Redirecting Storm Water Flows
Storm Water or Green Solution Examples
Finally, Consider Innovative Ideas Using Rain Barrels and Rain Gardens
What Are Rain Gardens?
Bowl-shaped garden Captures and absorbs stormwater Functional garden
Installing Rain Gardens
At least 10 ft. from house
Not on top of septic system or Sanitary Lateral Pipe
A sunny spot is best
Location, Location, Location
Slow it down, spread it out, soak it in!
Reduce runoff
Remove pollutants
Recharge ground water
And are beautiful
55
Rain Barrels 2001
56
Rain Barrels 2015
Determine Acceptable Methods of Private Property Rehabilitation
Conventional Fix - Redirect New Shallow PVC Piping to Existing Storm Lateral
Green or Storm Water fixes Include Rainfall Distributer, Rain Gardens, Rain Barrels
Establish Range of Costs for Homeowner Repairs
Consider Potential Grant Program (CHIP) for Funding
The Fix : Redirect Uncontrolled Storm Water to Street Or Storm Sewer
Approximate Material Costs: $200 - $300
Connectors, 50’ Piping, Rain Emitter
(Trencher Rental $175.00/Day)
How Much Can
You Remove?
What about That Sanitary Lateral
Leaks are Observed by CCTV
Camera in Main Sewer at
Lateral Discharge Point
Here’s the Conventional Fix Called Lining Existing Sanitary Lateral
Approximate Costs 50’: $ 2000-$3000
Storm Water or Green Solution Follows:
Sanipor Flood Grouting April 2003 Sealed 26 entire
laterals, plus 5 mainlines and 7 manholes
by flood grouting (Sanipor®)
Cost $580/$1000.00 lateral (approx.)
Fluid exfiltration test to assess effectiveness: immediately and 21 months after
And Now An Alternative
Private Property Rehabilitation
Problems Blocked or Collapsed Storm Laterals Leaking Storm Laterals Improper Storm Connections
Solutions Sanipor Repair Replacement of Storm Lateral Controlled Disconnect (Splash)
Alternative Methods to Reducing Infiltration and Inflow into Sanitary Sewer Laterals
Ed Kelly
Storm Water Control
Services, LLC
Questions ?
