1503ORDINANCE NO. 1503
AN ORDINANCE TO WAIVE COMPETITIVE BIDDING FOR THE
REMOVAL AND DISPOSAL OF THE EXISTING PRIMARY CLARIFIER
EQUIPMENT AND FOR THE CONSTRUCTION OF A OIL AND GREASE
BASIN AT THE WASTEWATER TREATMENT FACILITY OF WEST
MEMPHIS, ARKANSAS, DECLARING AN EMERGENCY AND FOR OTHER
PURPOSES.
WHEREAS, Arkansas Code Annotated Section 14-58-303
allows waiving of competitive bidding in exceptional
situations where such procedure is deemed not feasible or
practical; and
WHEREAS, the West Memphis Utility Commission has
determined that it would be in the best interest of the
City and local businesses for alterations to be made to the
wastewater treatment facilities to allow for the disposal
of oil and grease generated by local businesses; and
WHEREAS, the proposed alterations are attached hereto
and construction should begin as soon as possible in order
to avoid further hardship to local businesses caused by the
refusal of existing treatment facilities in Tennessee to
accept the oil and grease from local businesses for
disposal and, therefore, it would not be feasible or
practical to conduct competitive bidding for such services;
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF
THE CITY OF WEST MEMPHIS, ARKANSAS:
1. That competitive bidding be waived for the following
services to be used by the City, described as follows:
The removal and disposition of the existing primary clarifer
equipment and the construction of an oil and grease basin at
the West Memphis Wastewater Treatment Facility, at at cost
of $47,674.
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of Work
West Memphis, Arkansas
Wastewater Treatment Facility
flit & Grease Basin
Remove and dispose of the existing primary clarifier equipment including
chains, rakes, beams, launders and miscellaneous items,
A. In the south 30 feet of east basin, except for the skimmer
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mechanism.
B. In the entirQ east basin, except for the skimmer mechanism.
C. In the middle basin and the entire east basin except for the
east basin skimmer mechanism.
Construct a 20 foot long reinforced concrete divider wall across the
east basin approximately 30 feet from the south end and IO inches wide
by 8`-9"+ high, dowelled into the floor and walls and with a beam along
the top as shown in the attached sketch. Plug the holes for the four
removed launders in the east basin and the removed skimmer znd four
removed launders in the middle basin.
Install approximately 120 L.F. of six inch diameter, schedule 5S stain-
less steel air header, including a six inch tee and two six inch butter-
fly naives to replace the existing 2-way plug valve in the air header,
approximately six 90 elbows and the pipe supports, anchors and
miscellaneous items necessary for a complete and reliable installation.
Ai so install two replacement sheave assemblies to reduce blower speed to
approximately 1450 RPM to provide 450 CFM at fi PSI.
Using salvaged and stored aeration diffuser equipment, install the grid
system as shown in the attached figures consisting of 220 diffusers in
11 rows of 20 diffusers each with the required tee, pipe and coupling
for the canneetion to the six inch 5.5. drop pipe. Ai so install the
moisture blowoff assembly in the location shown. Provide new gaskets,
S.S. pipe supports and miscellaneous items required for a complete and
operable installation.
Install approximately 55 L.F. of three inch diameter schedule 5S stain-
less steel waste activated sludge pipe utilizing the existing valve and
e7 bow on the south side of the tee at the existing -v~ste sludge feed to
the west basin, and including approximately three 90 elbows. And the
pipe supports, anchors and miscellaneous items necessary for a complete
and reliable installation. Turn down a minimum of 5 feet into the east
basin.
fO. Install approximately 20 L.F. of three inch diameter schedule 5S stain-
le~s steel oil & grease pipe with a quick disconnect coupling and one
9fl elbow to turn down into the basin to a distance three feet off the
bottom with the pipe supports and miscellaneous items necessary for a
complete and reliable installation. Slope horizontal run of pipe
approximately six inches in ten feet toward the basin.
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locate the existing basin drain line. Connect new buried discharge pipe
and non-rising stem gate valve of same diameter and material and install
discharge pipe as necessary to slope toward and connect to the manhole
on the sanitary sewer line east of the basin. Provide valve box and
extension stem and operating handle as necessary to properly operate the
gate valve.
Free up the existing skimming mechanism in the east basin so that it
will function properly. In the exi~tinq skimmer discharge line on the
east side of the basin install a 90 elbow of the same diameter aid
material and turn the line down into the ground using a second 90 elbow
and new skimming discharge line to connect to the basin discharge line
and/or manhole as described in No. 7 above. Plug the abandoned skimming
line.
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EZS, QAKLEY, G~1'.ESTER & RIKE, INC. ENC3INEERiNG ANO PLANNiNCi CONSULTANTS
~0 Jefferson Building, Memphis, Tennessee 3$1Q5 (901) 5?~-7321
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