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Lansings Lead Service Line Replacement Program

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					Lansing’s Lead Service Line
  Replacement Program
      Michigan Section AWWA
         RTP Fall Seminar
         October 30, 2008


    The Board of Water and Light’s
             Experience
         Kevin Webber & Bill Maier
      Lansing Board of Water and Light
            Today’s Talk
LBWL History
Early Lead Experience
Recent History with lead
Lead Service Line Replacement Project
  Start up
  Improvements and adjustments
  Lessons learned
  Today and beyond
LBWL Lead Data Historical Results
1992-2002
    Changed phosphate      LBWL                  Lead Data Historical Results
    and began summer                                 1997-2002
    collection
       Date             # Samples        #            90th     Average[1]     Maximu      Minimum
                        Collected     Samples        %ile       (ppb)            m         (ppb)
                                      Required       (ppb)                     (ppb)
   Spring 1997              89           85           7.6          4.7           23           0
    Fall 1997               88           85            7           4.7           40           0
    Fall 1998               92           85           6.2          2.2           21           0
   Spring 1999              85           85           6.1          1.8           15           0
  Summer 2000               46          43[2]         9.1          3.9           20           0
  Summer 2001               56           43           13           4.7           34           0
  Summer 2002               68          43[3]        13.3          5.7           67           0

                                  ppb = parts per billion, or micrograms per liter

     [1]
           Average calculated using 0.0 for non-detects in each year. Detection Level is 3 ppb.

       In 2000, BWL qualified for reduced monitoring by showing 3 previous consecutive monitoring
     [2]

     periods with the 90th %ile value below the Practical Quantitation Level of 7.5 ppb.

      In 2002, because BWL 90th %ile was below Action Level for 3 consecutive monitoring periods,
     [3]

     BWL monitoring was reduced to one set per 3 years.
2004 Publicity
           Washington, DC
         Compare and Contrast
 Like us:
    Many lead service lines
    Use chloramine
    In trouble with customers
 Unlike us:
    Don’t own entire service line
    Didn’t use phosphate
    Switched from free chlorine to chloramine
    Drastically exceeded Action Level
    Actions Begun July 2004
Compliance testing annually
Free testing for full lead service lines
10-year replacement program
Expedited LSLR for sensitive populations
Corrosion control review
Enhanced Monitoring
   Replacement Program Begins
          Spring 2005
Ranked service lines for replacement
  Disturbed LSL
  Resident is pregnant or under six
  Schools, day-cares, other gatherings of
   children
  Resident with elevated blood lead level >10
   ug/dl
  Lead result >15 ug/l
  CSO areas
                 Records
Original installation info routinely
 available
All service lines owned by BWL
Many services of “unknown”
 composition
  Treated as if they are lead until proven
   otherwise
Color keyed
properties
according to
service line
material
      Staffing Considerations
 Mix of contractor work and BWL crews
 Sent 9 requests, got 4 bids
   Contractor 1
     Per unit basis
     Supplied all fill, gravel, sidewalk and lawn restoration
   Contactor 2
     Hourly rate, cap on per unit cost
     BWL supplied fill, gravel, sidewalk and lawn restoration
   2006: Chose Contractor 2
More economical
Allowed more thorough assessment of
 costs
Contractor willing, even anxious to
 explore time-saving methods
             2006 Contract
Included
  Full service line replacement
  Partial service line replacement (MCB,CBB)
  Labor and equipment
Did not include
  Sidewalk and lawn restoration
  Materials (fill, gravel, service line
   components)
                 Construction
 First choice to pull
    Quickest method when conditions permit
    Removes old lead service line
 Second choice to bore and/or split
    Leaves old lead service line in place
    Sometimes aim is a problem
 Third choice to trench
    Takes longer
    Most restoration
                      Hours per Service Line
                             2006/07
                       Hours Labor per Service


        25
                                                                    Street Side     14.3
                                                                    House Side      13.4
        20
                                                                    Full Service    22.6
        15                                                          All addresses
                                                                     combined        21.2
Hours




        10



         5



         0
             Street   House                      Both   Combined
                               Service Section
Methods (Street side)
         2006/07 Construction
           Breakdown of Service Line Replacement Methods
                             Street Side


                                           Pulled: 2043             (83%)
                                           Bored: 368               (15%)
                         TRENCHED
                                           Trenched: 56             (2%)
 BORED




                                                           PULLED
 Methods (House side)
        2006/07 Construction
          Breakdown of Service Line Replacement Methods
                            House Side


                                             Pulled: 1546            (74%)
                                             Bored: 549              (26%)
                           TRENCHED
                                             Trenched: 7             (<0.5%)
BORED




                                                            PULLED
                 Contracts
Followed first year with 3-year contract
  Fine-tuned cost per service
  Ground conditions rule everything
New bids winter of 2008
  Based on $/service:
     Main to curb box
     Curb box to building
     Full replacement
     Exploratory digs
                            Improvements Over Time
                                                     Cost of Lead Service Line Replacement


                     3000

                                         $2,657.00


                     2500



                                                                                   $2,025.50
                     2000
$ per Full Service




                     1500                                                                                 $1,381.65




                     1000




                     500




                       0
                              A (2005)                                  B (2005)               B (2008)
                                                                      Contractor
Accessing Curb Stop
Cable Pulling Kit
Exposed Curb Box
Cable Pull
            Some Obstacles

Electric
 Duct
 Line
 over
 Water
 Main
 Pulling
  Cable
 Under
Duct Line
Wide View of Cable Puller
Cutting Tool
Wall Entry at Meter
Entry With Wall Patch

                  NSF 61
                  certified
                  meters
                  installed
                  whenever
                  old meter is
                  moved
To Your Kitchen Sink
          Problems?
            A Few
Inadequate
 compacting




 Leaks
              Problems
Access
  No shows
  Unsanitary conditions
  Uncooperative in some
   way
  Change in 2008: Most
   everyone is home
                   Finish Up
 Restoration
   Abilities vary
    greatly among
    contractors
   Video record all
    sites
   Catch a break
    where possible
     Repaving projects
     Combined Sewer
      Separation project
      coordination
           Progress So Far
Initial task was 13,000 addresses with
 lead or unknown material
We’re halfway there! Have replaced
 service lines at 6,500 addresses to date
Most customers are satisfied with our
 progress.
  However, some are apathetic. A few remain
   angry
          Lessons Learned
Educate customers
  We thought that we had. It didn’t take, and
   it cost us
Know the system
  Take the extra time to pin down material
   composition when opportunity strikes
Lead issue is here to stay
  Consider a pro-active approach
Questions?

				
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