Memorandum
City of
Utilities Department
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To: |
David Corliss, City
Manager |
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From: |
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|
CC: |
Dave Wagner,
Director of Utilities Mike Lawless,
Assistant Utilities Director Beth Krishtalka,
Utilities Management Analyst |
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Date: |
June 29, 2009 |
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RE: |
July 07, 2009 City
Commission Agenda Approve Chemical
Root Control Contract/Bid# B09034 |
Please include the following item on the City Commission agenda for consideration at the July 07, 2009 meeting.
Bid# B09034 - Approve
2009 Chemical Root Control Contract with Dukes Root Control, Inc
History:
The purpose of the
program is to apply chemical root control agent to sanitary sewers in order to
kill the root growth present in the lines and to inhibit re‑growth
without permanently damaging the vegetation producing the roots.
The Utility Department
began the Root Control Program in 1998. The treated sanitary sewer line
segments have a 2-year warranty against root re-growth. The vendor will
re-apply treatment if roots re-grow in the line during the warranty period at
no additional cost to the city. The selected sanitary sewer line segments in each
year’s project are retreated every 3rd year as part of the Root
Control Program.
Sanitary sewer
line segments are selected for root control on the basis of several
factors. These factors include:
· Blockages caused by root infiltration
· TV inspection
· Maintenance records
· Age of pipe
· Pipe material
· Above ground conditions
On June 16, 2009
bids were opened for the 2009 Root Control Program. Two vendors bid on the
project, Ace Pipe Cleaning and Duke’s Root Control, Inc. The bid provided for
four (4) annual renewals beyond the initial contract year. The bid submitted by
Ace Pipe Cleaning is considered unresponsive as it did not meet the criteria specified
in the bid documents nor did they respond to all elements requested in the bid
proposal.
The City bid
specifications required bid prices for pipe sizes from 8-inch through 24-inch,
a 5% Bid Bond and a minimum of three (3)
Root Control Chemical Comparisons
|
|
Razorooter II |
Sanafoam Vaporooter II |
|
Active
Ingredient Concentration (according
to the EPA label) |
Contains
37.3% diquat dibromide (diquat)
in a water-based concentrate that is highly soluble in water for easy mixing |
Contains
30% metam sodium (metam)
water based concentrate and 50% dichlobenil wettable powder |
|
EPA
Carcinogenicity Classification |
USEPA
Group E – Evidence of non-carcinogenicity for Humans |
Metam:
USEPA Group C – Possible Human Carcinogen Dichlobenil:
USEPA Group C – Possible Human Carcinogen
|
|
Chemical
Stability |
Non-volatile
liquid concentrate that is highly soluble in water for easy mixing |
Metam
will degrade when diluted with water to methyl isothiocyanate (MITC), a
moderate poison, and/or to hydrogen sulfide, a highly poisonous gas |
|
EPA
Acute Toxicity Classification Signal Word |
Category
2: Warning |
Category
1: Danger (due
to acute toxicity) |
|
EPA
Restricted Use Pesticide |
No |
Yes,
due to acute toxicity |
|
Non-Target
Effects |
Diquat
is a contact herbicide that binds quickly and strongly to the target roots,
organic material and clay, sand and silt particles in wastewater. This
greatly minimizes diquat effects to beneficial microorganism populations
important in the degradation process of dead root tissue |
Metam
acts a biocide by killing all live organisms within the treated sections of
sewer pipe, including beneficial microorganisms important in the degradation
process of dead root tissue. |
Duke’s Root
Control, Inc met all specifications. Duke’s Root Control has been the
successful bidder since 1998. The 2009-2013 bid prices submitted by Duke’s are
the same cost per foot as bid in the 2006 – 2008 root control program.
The bid tabulation
is in the following two tables.
Duke’s Root Control, Inc - $99,959.21
|
Pipe Size |
2009 Unit Price Per Linear Foot |
2010 Unit Price Per Linear Foot |
2011 Unit Price Per Linear Foot |
2012 Unit Price Per Linear Foot |
2013 Unit Price Per Linear Foot |
Estimated Footage Per year |
|
8
inch |
$1.29 |
$1.29 |
$1.29 |
$1.29 |
$1.29 |
77,519 |
|
10 inch |
$1.76 |
$1.76 |
$1.76 |
$1.76 |
$1.76 |
|
|
12 inch |
$1.92 |
$1.92 |
$1.92 |
$1.92 |
$1.92 |
|
|
15 inch |
$2.73 |
$2.73 |
$2.73 |
$2.73 |
$2.73 |
|
|
18 inch |
$3.97 |
$3.97 |
$3.97 |
$3.97 |
$3.97 |
|
|
24 inch |
$6.35 |
$6.35 |
$6.35 |
$6.35 |
$6.35 |
|
Ace Pipe Cleaning - $72,092.67
|
Pipe Size |
2009 Unit Price Per Linear Foot |
2010 Unit Price Per Linear Foot |
2011 Unit Price Per Linear Foot |
2012 Unit Price Per Linear Foot |
2013 Unit Price Per Linear Foot |
Estimated Footage Per year |
|
8
inch |
$0.93 |
$0.96 |
$1.00 |
$1.03 |
$1.06 |
77,519 |
|
10 inch |
No bid |
No bid |
No bid |
No bid |
No bid |
|
|
12 inch |
No bid |
No bid |
No bid |
No bid |
No bid |
|
|
15 inch |
No bid |
No bid |
No bid |
No bid |
No bid |
|
|
18 inch |
No bid |
No bid |
No bid |
No bid |
No bid |
|
|
24 inch |
No bid |
No bid |
No bid |
No bid |
No bid |
|
Program Status:
The Utilities Department implemented a Chemical Root Control Program in 1998. The program is very successful in reducing root growth in city mains which aids in preventing root blockages thus reducing backup calls and sanitary sewer overflows and improving customer service.
Project Funding:
Funding for the 2009 Chemical Root Control Program will come from the 2009 Collection System Operations and Maintenance budget: 501-7410-584-2538.
Action Request:
Utilities Department staff recommends approval from the City Commission to authorize the City Manager to execute a contract agreement and purchase order with Duke’s Root Control, Inc in the amount of $99,959.51 to complete the 2009 Chemical Root Control Program.
Thank you for your assistance. Please advise if you have any questions.
|
cc: |
|
Mike
Lawless |
|
|
|
Diane
Stoddard |
Bobbie
Walthall |
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|
|
Jonathan
Douglass |
Mark
Hegeman |
|
|
|
|
Alan
Landis |
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