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FROM:
Mayor and City Council
General Services Director
C 3L138
City Council Agenda
Item No. 15
October 23, 2001
SUBJECT: Refuse Transfer Station Scale System —Award of Contract
Recommendation:
APPROVED
Award contract to Advanced On -Board Scales for the total bid price of $57,986 and
authorize the City Manager to execute the contract.
Background:
The refuse transfer station was built and equipped with a scale system in the Corporation
Yard in 1989 -90. The purpose of the station is to consolidate the smaller refuse packer
truckloads into large tractor - trailer loads for transport of the collected refuse to a
recycling center in Stanton.
One of the functions of the refuse transfer station is the weighing of each refuse load to
insure not just the accuracy of the scales and billing at the recycling center, but to ensure
maximum loads (40,400 pounds) are shipped consistently for maximum efficiency.
The current scale system consists of dual computers with individual displays, a two -cable
system to the trailers connecting the computer to the trailers, and weight- sensing
equipment mounted on each of the four refuse transfer trailers.
Empty trailers are staged under a refuse hopper at the station, the scale's computer cable
is then connected to the trailer, and the refuse transfer station operator manages the
precise filling of the trailer by monitoring the weight of the trailer at the computer
display.
Discussion:
The current refuse transfer station scale system is 12 years old and has been subject to
bad weather, contamination by dust and moisture, and heavy use as an average of 175
tons of refuse is processed daily through the station. The system design is prone to
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frequent failure or inaccurate readings, particularly as the system has aged due to the
exposure of the cables, displays and weight cells on each trailer. Individual trailers must
be calibrated on a quarterly basis due to heavy use resulting in downtime and expense.
Staff researched all scale options and is recommending the use of platform scales
installed in the floor of the station to measure trailer weight. Such a design eliminates the
use of cables, exposed electrical connections, and the weight cells on each refuse trailer
thereby speeding the loading and transfer of each trailer Ioad.
The attached sketch illustrates the proposed installation of a series of platform scales in
the floor of the station. A trailer is parked on each platform series for individual loading.
The contractor, Advanced On -Board Scales, who is also the local distributor, is the
representative of the manufacturer of the original scale system. The contractor will be
installing the system in coordination with the City concrete crew and electricians. The
contractor has provided reliable service for the current scale system over the past 12
years.
The attached proposal by Advanced On -Board Scales outlines the work to be
accomplished and includes photos and data.
The cost of the new system is $57,986 which includes installation and warranty. The bid
is 17% below the engineer's estimate of $70,000. The proposal is a sole source bid due
to the lack of availability of such a compact scale system and the necessity to continue
daily use of a reliable system of components.
The replacement scale system was included in the current capital improvement projects
budget, but requires final authority of the Council as the project exceeds the $30,000 limit
authorization of the City Manager. There are sufficient funds available in the following
account for the work:
Account Description
Account Number
Amount
Corporation Yard Improvement
7011- C3120628
$57,986
Very respectfully,
David E. Niederhaus
DEN /mhl
Attachments: (A) Transfer Station Layout Drawing
(B) Advanced On -Beard Scales proposal of October 11, 2001
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ADVANCED ON -BOARD SCALES
P.O. Box 850, Chino Hills, CA 91709
Office (909) 597 -6719, Fax (909) 606 -1854, Pager (909) 819 -7327
SERVING SOUTHERN CALIFORNIA SINCE 1983
October 11, 2001 Page 1 of 2
Mr. David E. Niederhaus
Mr. William S. Russo
City of Newport Beach
3300 Newport Blvd.
Newport Beach, CA 92659 -1768
Gentlemen,
I appreciate the opportunity to offer the services of S.I. /Allegany & Advanced On -Board Scales in
converting your Trash Transfer Station Weighing system to Pairs of Axle Scales located in both
loading bays. I have broken the bid into eight (8) sections reflecting the systems, process, responsi-
bilities, and labor.
1.) Two sets of L3031 Aluminum, Box -End Tandem Axle Scales (2 each 7.5" x 30" platforms),
to be installed in shallow pits in Both trailer loading bays (total of 4 sets). One set will weigh the
tandem trailer axles, and the other will weigh the landing gear of the trailer in each of the loading
bays.
2.) Stationary S.I. 910OGW Meters in NEMA watertight enclosures total of 2 and 4" Slave Score-
board for each loading bay total of 2 mounted up above on the corner light stand.
3.) We'll furnish Pre - fabricated galvanized steel coping frames to reinforce the edges in each of
the four (4) shallow pits that Newport will build for the axle scales. Four (4) frames total.
4.) Wood ( 2 "x 6" )pressure treated boards, acquire, cut & joined to fit between each of the two axle
scales in each of 4 scale pits.
5.) 200' of T — Molding to fill the gaps between the scales and the pit edges to deflect debris from
entering the pit under the scales.
6.) Four (4) each, 24" x 31" x 3/8" Galvanized steel plates to reinforce scale decks for landing gear
positioning. We'll acquire sheared material, drill for mounting, deliver & p/u from galvanizing, install.
Total of Equipment, Items #1,2,3,4,5,6 = $51,615.00
7.5% Sales tax on Equipment = $ 3,871.13
7.) The City of Newport Beach will provide the concrete removal and construct 4 shallow pits to fit
scales with proper drainage, etc. Your electrician will run conduit inside & between the pits, route
conduit up to the indicators and scoreboards, and assist in pulling wire.
8.) Advanced On -Board Scales will provide shallow pit scale guidelines and rough conduit routing
drawings to your concrete foreman and electrician, install Scale Systems Hardware, Meter & Score-
boards installation, activation, and operator orientation.
Advanced On -Board Scale's labor = $2,500.00
Total of all Equipment, Sales Tax, and My Labor = $57,986.13
Once again I want to thank you for this opportunity to offer our scales and services.
Sinc
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Ron S ith
Advanced On -Board Scales
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