CITY OF CHARLESTON, ILLINOIS,

)

)

Petitioner,

)

)

)

__

)

)

ILLINOIS ENVIRONMENTAL

)

PROTECTION AGENCY,

)

)

Respondent,

)

NOTICE OF FILENG

To:

Illinois Pollution Control Board

Illinois Environmental Protection Agency

100 West Randolph Street

1021 North Grand Avenue East

James R. Thompson Center

P.O. Box 19276

Suite 11-500

Springfield, Illinois 62794-9276

Chicago, illinois 60601-3218

PLEASE

TAKE

NOTICE that

I

have

today

filed

with

the

Office

of the

Clerk

of the

Pollution

Control

the

ECOND

VARIANCE

PETITION

of

THE

CITY

OF

CHARLES~T$~N,

-,

OIS~a

y ofwhich is

herewith served upon you

N Brian L. Bower,

tto

ney

Date

Brian L. Bower

Brainard, Bower and Kramer Law Offices

600 Jackson Avenue

Charleston, Illinois 61920

(217) 345-2484

BEFORE THE ILLINOIS POLLUTION CONTROL BOAR)

V.

RECEIVED

J~N

-

2

2004

0

~

~

Iu.w~

POLWn~pj

cONTROL 8aq~o

PCB

1Yr~

1

IL

Variance

—

IESWTR

---

Certificate of Service

I, the undersigned,

certify

that I have

served

the attached VARIANCE PETITION,

ofTHE

CITY

OF CHARLESTON, ILLINOIS,

via

the United States Post Office at

Charleston, Illinois, in an envelope with sufficient postage affixed, upon the following

persons with ten (10) copies going to the Illinois Pollution

Control Board and one (1) copy

going to the Illinois Environmental Protection Agency.

To:

Illinois Pollution Control Board

Illinois Environmental Protection Agency

100 West Randolph Street

1021 North Grand Avenue East

James

R. Thompson Center

P.O. Box 19276

Suite 11-500

Springfield, Illinois 62794-9276

Chicago, Illinois

60601-3218

DATED this

3

~&

day of~1~ ~

Bria

.

o

er, City Attorney

Brian L. Bower

City Attorney

600 Jackson Avenue

Charleston, Illinois 61920

(217) 345-2484

---

VARIANCE

RECEIVED

BEFORE THE ILLINOIS POLLUTION CONTROL BOARDJAM

-

2

2004

Uê

U.UMJ~

POWJTiON CONTROL ~OARO

CITY OF CHARLESTON, ILLINOIS,

)

Petitioner,

)

V.

)

PCBO’t-

liL

)

Variance

—

IESWTR

ILLINOIS ENVIRONMENTAL

)

PROTECTION AGENCY,

)

Respondent.

)

---

SECOND VARIANCE PETITION

TIME

EXTENSION

—

INTERIM

ENHANCED SURFACE WATER TREATMENT

CITY OF CHARLESTON

a)

STATEMENT

DESCRIBING

THE

REGULATION,

REQUIREMENT,

OR

ORDER

OF

THE

BOARD

FROM

WHICH A

VARIANCE

IS

SOUGHT:

The

City of Charleston

is

seeking

a time

extension variance

in

order

to

comply

with the provision

of the

Interim

Enhanced Surface Water Treatment Rule (IESWTR) which requires that

95

of all monthly

combined

filtered water turbidity

measurements

(taken every

four hours)

be

less

than

or

equal

to

0.3

nephelometric

turbidity

units

(NTU).

The

IESWTR was

promulgated in

the

Federal Register,

63

FR

69478,

on

December

16,

1998.

The

IESWTR requirements

are

applicable

to

public water systems

serving

10,000

or more persons.

Section

611.743,

Part

611: Primary Drinking Water Standards of Subtitle F:

Public Water

Supplies regulations, 35

Illinois

Administrative

Code,

has incorporated specific

filtration requirements

and reads

as

follows:

“A PWS subject to

the requirements of this

Subpart that

does not meet

all of the

standards

in

this

Subpart

and

Subpart

B

of this Part for

avoiding

filtration

shall

provide

treatment

consisting

of both

disinfection,

as

specified

in

Section

611.242,

and

filtration

treatment

which complies with the

requirements of subsection

(a) or (b) of this

Section

or

Section

611.250

(b)

or

(c)

by

December

31,

2001.

a)

For

systems

using

conventional

filtration

or

direct

filtration,

the

turbidity

level

of representative

samples of

a

system’s

filtered

water

must

be

less

than

or

equal

to

0.3

NTU

in

at

least

95

percent

of

the

measurements taken each month, measured as specified in Sections 611.531

and

611.533.”

2

---

1~)

1.

LOCATION OF, AND AREA AFFECTED BY, THE

PETITIONER’S ACTIVITY:

The

City

of

Charleston

owns

and

operates

a

water treatment

plant

(IEPA

Facility

#0290100)

located

at

2600

McKinley

Avenue,

Charleston,

Illinois,

61920.

The City provides potable water service to 21,039 residents within the

City

limits including Eastern Illinois University.

2.

LOCATION

OF

POINTS

OF

DISCHAR.GE

&

NEAREST

AIR

MONTTOR1NG

STATION:

Discharge and air quality information are not applicable to this variance.

3.

IDENTIFICATION OF

PRIOR VARIANCE ISSUED

TO PETITIONER:

The City

of Charleston was

granted

a

variance

to

35

IL

Adniin

Code

61 1.743(a)(l)

by the

illinois

Pollution

Control Board

on

December

06,

2001.

That variance expires on

December 30,2003 and is attached as Exhibit ‘A’.

i.

4.

IDENTIFICATION,

INCLUDING NUMBER,

OF

ENVIRONMENTAL PERMITS

AFFECTED

BY

VARIANCE:

IEPA

issued

a

facility

number

to

the

City

of

Charleston for the Water Treatment Plant.

The Facility Number is 00290100.

To the

best ofthe City’s knowledge, the issuance of a variance for the water treatment plant

would not impact the permits issued to

the City.

5.

NUMBER OF PERSONS EMPLOYED AT FACILITY AND AGE OF FACILITY:

Seven

flilitime, certified operators

are employed

at the water treatment plant,

which

was constructed in

1964 and now is over

29

years old.

6.

NATURE AND

AMOUNT

OF

MATERIALS

USED

IN

THE

PROCESS

AND

A

DESCRIPTION

OF

THE

PROCESS:

The

existing water treatment

plant

is

a

4.0

3

---

MOD conventional lime softening plant.

The source water for the plant is a 1-billion

gallon

reservoir known

as the Charleston Side

Channel Reservoir.

Source water is

pumped to the plant

from

a raw water pump

station located at the reservoir.

Lime

(158

mg/i

avg.

dose),

alum

(27

mg/i

avg.

dose),

chorine

(1.46

mg/i

avg.

dose),

chlorine dioxide

(0.78 mg/l

avg.

dose) and a coagulant aid are added to the water in

the

rapid

mix chamber

before entering

the

lime

softening

contact

basins.

Settled

water from

the

basins

then

flows through

a

recarbonation chamber

where

carbon

dioxide (38 mg/i avg.

dose) and polyphosphate (0.9 mg/i avg.

dose) are added for pH

adjustment and

corrosion

control.

The water then is

filtered through

multi-media

GAC

filter beds before entering the clearwell where

chlorine (3.36 mg/i avg.

dose),

ammonia (0.8 mg/i

avg.

dose), fluoride (0.93 mg/i

avg. dose)

are

added. The filtered

water is then pumped from the clearwell into the distribution system.

7.

DESCRIPTION

OF RELEVANT POLLUTION

CONTROL EQUIPMENT IN USE:

The City monitors water quality as per the requirements of the

Safe Drinking Water

Act,

as

amended.

Process residuals

are monitored

either

by

probe

or by

manual

sampling.

IEPA

approved

laboratory protocols

are

used for

analysis.

Turbidity

automatically is monitored using “Hach turbidimeters”

and is ofparticular importance

in

this

instance

since this

is

the particular new

parameter limit

(0.3

NTU) that

the

City’s existing plant willnot be able to meet beginning on January

1, 2002.

8.

NATURE

AND

AMOUNT

OF

DISCHARGES

OF

THE

CONSTITUENT

IN

QUESTION CURRENTLY GENERATED BY PETITIONER:

Currently, the City is

able to meet the current finished water turbidity requirement of

0.5

NTU

95

ofthe

time as required by the present regulations.

However, based upon historical fmished

4

---

water quality

data,

the plant

only

can produce finished water meeting

the new 0.3

NTU

requirement

70

of

the

time,

on

the

average,

with

a

minimum

monthly

turbidity

compliance

rate

of

only

33.

This

is

somewhat

less

than

the~5

compliance raterequired by the IESWTR.

c)

DATA

DESCRIBING

THE

NATURE

AND

EXTENT

OF

THE

PRESENT

OR

ANTICIPATED

FAILURE

TO

MEET

THE

REGULATION,

REQUIREMENT,

OR

ORDER OF THE BOARD FROM WHICH VARIANCE IS SOUGHT AND FACTS

THAT

SUPPORT

PETITIONER’S

ARGUMENT

THAT

COMPLIANCE

CAN

NOT

BE

ACHIEVED BY THE

COMPLIANCE

DATE:

Attached

as

Exhibit

‘B’

are

the finished

water turbidity

records

from

January

2002

to

October 2003.

The records

show

the plant

achieved

the

0.3

NTU requirement in

13

of the past 22

months

and

for

10

of the past

12

months.

The City has continued to increase

our ability to meet the

0.3 NTIJ requirement.

However, we are,not yet capable ofmeeting the rule everymonth.

d)

DESCRIPTION OF EFFORTS THAT WOULD BE NECESSARY FOR THE PETITIONER

TO ACHIEVE IMMEDIATE COMPLIANCE WITH THE REGULATION:

The immediate

effort being taken to

comply with the IESWTR

is the construction of a new 4.5mgd Water

Treatment Plant.

The project includes larger contact basins, improved recarbonation contact,

and

deeper

filters.

The

cost

of

the

project

is

$9,071,000.00.

The

Engineer’s

Design

Summary for the project, prepared ‘by Crawford, Murphy,

&

Tilly Engineering Consultants,

is attached as Exhibit ‘C’.

e)

FACTS

THAT

SETS

FORTH

THE

REASONS

THE

PETITIONER

BELIEVES

THAT

IMMEDIATE

COMPLIANCE

WOULD

IMPOSE

AN

ARBITRARY

OR

UNREASONABLE HARDSHIP:

The .previous variance dated December 06, 2001

allowed

5

---

2

years for the City of Charleston to

complete the design and

construction of a new Water

Treatment Plant.

Design work was completed and construction bids

were accepted on May

22, 2002.

This work was completed on. an appropriate, time schedule to’meet the conditions’

ofthe variance.

The lowest bid was $11,202,800.00.

The City elected to redesign the project

in an effort to reduce the construction cost closer to the City’s budget of$8,500,000.00.

The

second design was completed and construction bids were accepted on August 21, 2003.

The

lowest bid was

$9,071,000.00.

The

City awarded

that bid

to

River

City Construction

on

September 30, 2003.

The City of Charleston contends that accepting the initial $11,202,800

bid to meet

the time

lines of the December

06,

2001

variance would have resulted in

an

undue hardship ‘of $2,131,800.

:1)

1.

DISCUSSION

OF

PROPOSED

EQUIPMENT

OR METHOD

OF

CONTROL TO

BE

UNDERTAKEN

,

TO

ACHIEVE

FULL

COMPLIANCE

WITH

TIlE

REGULATION:

The City of Charleston will construct

a new water treatment plant

including new solids contact basins

for hardness and particulate (turbidity)

removal,

new recarbonation basins for pH adjustment, a new ozone contactbasin for taste and

odor control and new biologically

active filters with

granular activated carbon filters

for particulate

(turbidity)

removal

and taste and odor

control.

The

finished water

turbidity produced by the new plant

is

expected to

be

0.1,

or less,

NTU

95

ofthe

time

-

far exceeding the 0.3 NTU/

95

requirement ofthe IESWTR.

2.

TIME

SCHEDULE

FOR THE

IMPLEMENTATION

OF ALL

PHASES OF THE

CONTROL

PROGRAM

FROM

INITIATION

OF

DESIGN

TO

PROGRAM

COMPLETION:

The

“Notice

to

Proceed”

for

the

.cbnstruction

contract

was

6

---

issued to River City Construction on October 24, 2003.

The contract requires

that construction

be completed by April 27, 2005.

The ‘City of Charleston has

also

been

required

to

complete

a

pilot study

on

the ozone

and bioIo~aIIy

active filter process for the

new plant prior to permit approval

for the ozone

‘equipment.

The April

27, 2005

ôompletion date ‘is expected to

be delayed to

June 30, 2005

for full

completion

including the ozone

and

biologically active

filter processes.

3.

ESTIMATED COSTS TO ACHIEVE COMPLIANCE:

An itemized list of costs for

the project includes:

Phase I

Design, Black & Veatch

$96,384

Phase 2 Design, Black & Veatch

$775,000

Phase

I

Design, Crawford Murphy & Tilly

$40,000

Phase 2 Design, Crawford Murphy & lilly

$699,300

Construction, ‘River City Construction

$9,071,000

Construction Engineering, Crawford

Murphy & Tilly

$260,000

Construction Engineering,

Resident

Engineer

$142,000

Pilot Study

~00O

Bond Issuing

Fees

$93,000

TOTAL COST

$11,236,684

g)

1.

NATURE

AND

AMOUNT

OF

DISCHARGES

OF

THE

CONSTITUENT

IN

QUESTION

IF

VARIANCE

IS

GRANTED,

COMPARED

TO

THAT

WHICH

WOULD RESULT IF IMMEDIATE

COMPLIANCE IS REQUIRED:

The

existing

water treatment plant

is

capable of meeting a turbidity

standard of

0.5

NTU’s every

7

---

month.

Continuing

declines

in

water

usage

and

continuing

efforts

to

improve

treatment process controlhas allowed the existing plant to meet the 0.3 NTU turbidity

standard in 70,

ormore, ofthe. readings collected in 21. ofthe past 22 months.

2.’

QUALITATIVE

AND

QUANTITATIVE

DESCRIPTION

OF

THE

IMPACT

OF

PETITIONER’S ACTIVITY ON

HUMAN HEALTH AND THE ENVIRONMENT:

The City of Charleston will continue its

efforts

to achieve improved performance on

the

0.3

NTU

Turbidity

Standard

while

awaiting

construction

of the

new

water

treatment

plant.

There

are

~

anticipated

impacts

on

human

health

or

the

environment in theinterim.

3.

A STATEMENT

OF

MEASURES

TO

BE

TAKEN

DURING PERIOD

OF

THE

VARIANCE

TO

MThfflvIIZE

THE

IMPACT

OF

TIlE

DISCHARGE

OF

CONTAMINANTS

ON

HUMAN,

PLANT, AND

ANIMAL LIFE

IN AFFECTED

AREA,

INCLUDING

NUMERICAL

INTERIM

DISCHARGE

LIMITATIONS

THAT CAN BE

ACHIEVED DURING THE PERIOD OF TIlE VARIANCE:

The

City will continue to

comply with the

0.5

NTIJ Turbidity Standard.

Specifically the

City of Charleston will achieve turbidity readings of

0.544

NUT’s or less, on

95,

or

more, ofthe readings required to be taken in each calendar month.

Furthermore, the

City of Charleston will endeavor to

achieve turbidity readings of 0.344

NTU’s,

or

less, on 70,

or more, ofthe readings required to be taken in each calendar month for

the duration ofthe variance.

h)

CITATION TO SUPPORTING DOCUMENTS OR LEGAL AUTHORITIES WHENEVER

THEY ARE USED AS A BASIS FOR THE PETITION: Not applicable.

i)

PERMITS:

The existing permits are included herein as Exhibit D.

8

---

4.

ANY

CONDITIONS

PETITIONER

SUGGESTS

FOR

THE

REQUESTED

VARIANCE:

If the City filly complies

with the measures outlined in (g) (3), it shall

not ‘be cited for violations pertaining to 0.3 NTU/95

turbidity requirement cot~ained

in Section 611.743, Part 611: Primary Drinking Water Standards ofSubtitle F:”Public

Water Supplies, regulations, 35 Illinois Administrative Code.

j)

PROPOSED

BEGINNING

AND ENDING

DATE FOR THE

VARIANCE:

The

City of

Charlestonwould like the variance to extend from January

1, 2004 until June 30, 2005.

k)

DISCUSSION OF

CONSISTENCY WITH FEDERAL LAW:

A two (2) year time extension

was provided for in Section

1412

(b) (10) of the

1996 Safe Drinking Water Act where major

capital improvements are needed to comply with new regulations.

The City must construct a

new water treatment plant

in

order

to

comply

with

the

new

IESWTR, which

is

a

‘major

capital improvement.

Section 1412

(b) (10) reads

as follows: “A national primary drinking

water regulation promulgated

under

this

section

(and

any

amendment

thereto)

shall take

effect

on the

date that is

three years

after the

date on which the regulation is promulgated

unless

the

Administrator

determines

that

an

earlier

date

is

practicable,

except

that

the

Administrator or a State

(in the case of an individual system) may allow up to

2 additional

years

to

comply

with

a

maximum

contaminant

level

or

treatment

technique

if

the

Administrator or State (in the case of an individual system) determines that additional time is

necessary for capital improvements.”

The City’s

second variance request is

consistent with

this

federal

provision

since the

City

must

construct

a new

treatment

facility in

order

to

comply with the regulations and the second variance is needed for thereasons stated herein.

.1)

AFFIDAVIT: The affidavit is enclosed.

9

---

in)

STATEMENT REQUESTING

OR DENYING HEARING:

Petitioner requests

hearing in

this cause.

Wherefore,

the City ofCharleston, illinois prays that this

honorable Board grant the variance as

requested herein and for such other and different relief the Board finds as appropriate.

DATED THIS ~

DAY OF

,

2004.

Its Attorney

10

---

BEFORE

THE ILLINOIS POLLUTION CONTROL BOARD

CITY OF

CHARLESTON,

ILLINOIS,

)

)

Petitioner,

.

)

v.

)

PCB_-___

)

)

Variance

—

ILLINOIS ENVIRONMENTAL

)

PROTECTION AGENCY,

)

Respondent,

)

AFFIDAVIT

R. SCOTT SMITH, City Manager for the City of Charleston being

first duly

sworn under oath deposes and states as follows:

1.

That this

affiant, if

called

as

a

witness

could

competently

testify

to the

contents of this affidavit.

2.

That this

affiant, is

the

City Manager for

the

City of Charleston,

Coles

County, Illinois.

3.

That this

affiant, has

read

the

contents

of the Petition

for

Variance for

which

this

affidavit

is

filed

in

support,

is

familiar

with

the

4.

Further this affiant saith not.

DATED this

~

day of

~

2003.

R. Scott~S~mith,

Cjty

Subscribed

and Sworn to before

me this

~I3C7~’day of____________ 2003.

OFAC~ALSEAL

JEANE1TE

L COMBS

~IOTA~Y

PL~L*C,

STATE OF W~OI8

MY COM~1I~S~ON

EXP~ES:O~m~S

---

EXHIBIT A

CITY’ OF CHARLESTON WATER TREATMENT

PLANT

TURBIDITY DATA SUMMARY

JANUARY, 1998 TO MAY, 2001

MONTH

1998

1999

•

Total

Percent of

Total

,

Measurements

Measurements

Measurements

below 0.3 NTU

below 0.3 NTU

Total

Measurements

Total

Percent of

Measurements

Measurem~nts

below 0.3

NTU

below 0.3 NTU

January

286

250

87.41

241

173

71 .78

February

266

228

85.71

231

148

64.07

March

280

186

66.43

242

141

58.26

Apñl

293

121

41.30

273

126

46.15

May

-

283

96

33.92

282

183

64.89

June

283

‘242

85.51

278

261

93.88

July

310

297

95.81

283

256

90.46

August

312

262

83.97

281

280

99.64

September

287

117

40.77

287

283

98.61

Oct9ber

280

197

70.36

289

288

99.65

November

243

163

67.08

253

250

98.81

December

244

209

85.66

223

174

78.03

AVERAGE

70.33

80.35

MINIMUM

.

33.92

46.15

MONTH

.

2000

2001

.

.

Total

Measurements

Total

Measurements

below 0.3

NT1J

Percent of

Measurements

below 0.3 NTU

,

Total

Measurements

Total

,

Measurements

below 0.3 NTU

Percent of

Measurements

below 0.3 NTU

January

.

247

‘

95

38.46

251

205

81.67

February

241

154

63.90

330

223

67.58

~rch

246

234

95.12

336

313

93.15

April

262

230

87.79

340

265

77.94

May

251

231

92.03

340

250

73.53

June

252

248

96.41

•

July

255

233

91.37

August

281

278

98.93

September

‘

260

243

93.46

October

282

278

98.58

November

232

218

93.97

~~imber

238

217

91.18

AVERAGE

,

86.93

78.17

MINIMUM

38.46

67.58

,

---

DESIGN MEMORANDUM

---

Charleston,

illinois

DESiGN MEMORANDUM

W~erTreatment

.

The

mezzanine

level ofthe conditioned

‘area

will consist ofthe lime feedroom, administrative

areas, including theplant superintendent’s

office, a control station, an operators laboratory

restroomilocker facilities, a small multipurpose meeting roonifluncbroorn,

and

a gallery

overlooking the filters

and

unconditioned area.

Awall consistingof glass panels will separate

thein~zzai~leve1onrthei~neonditioned

area. .Tw

ors

rovide~cess-to .catwalks

located in the unconditioned

-area.

The lime silo

will

be locatód. on the roofofthe building above

~he

lime feedroom.

Slaked

lime

wiil be delivered to the mixing zone ofeach softeningbasin by gravitytl~rough

troughs attached

to the catwallá in the

unconditioned area~

Chemical feed.lines and. electrical conduit will also be

attached

to

the catwalks.

0

The unconditioned areawill

contain

all of thebasins, filters, and. the large equipment. A

travelingbridge crane will access all ofthe equipment located

in this area. The clearwells, future

UV modules, washwater pumps,

and

high service pumps

will

be located in thebasement at

elevation 678.

Two sets of

stairs

will leadto this lower area.

A sump containing a small sump

pump and larger emergency sunip pump will transfer spilled water from this elevation to drains

located on the operating floor above.

The area directlyabove the basement level will be kept

open to allowthe bridge crane to access all óquipment.

.

The operating floor ofthe unconditioned area will be at elevation 691.

A two-foot tall concrete

containment wuitsmtounds theperimeter

ofthe operating floorto contain a catastrophic leak

-

from one ofthe softening basins.

Thepre-engineeredmetal building willbe constructed atop

this wall.

-

The containment

curb

will also

encircle the

opening

to the basement level to prevent

leaks

from reaching the lower level.

The conditioned area willbe located -two feet higher than

the operating floor ofthe non-conditioned area to prevent leakage from entering the chemical

feed area.

The large area drains will be

designed to

conveythe spillage away from the building

to the

storm

sewer system.

All

equipment, located on the operating floor, will be installed on

two

feet tall equipment basOs to prevent damage from basin leakage.

The operating floor will contain

two

painted steel softeningbasins,

twa

painted steel

recarbonation basin, four cast-in-place concrete orpackaged steel filter boxes, a painted steel

flow splitter, ozone generation and

injection

equipment,

and

air/water

backwash

equipment.

Space has been left for a future recarbonationbasin,

a

future softening

basin~,

and two

additional

filters.

The future filters maybe constructed at this time, without piping or media, to avoid

future installationproblems.

-

S

-

-

-

-

A loading dock,

with

an overhead door, willbe provided for

unloading

equipment pickedup by

the travellingbridge crane.

Apersonnel-door will be located at the dock to provide access to the

exterior ofthe building.

A

manual

operated overhead door willbe providednear the future

‘softening basin to provide ‘access for the future construction.

The air/waterbackwash blowers

and

equipment will be located in a small room,

with

removableroofpanels, to reduce noise.

The

existing engine generator will be relocated from the existing chemical ‘feedbuilding to a concrete

Black

&

Veatch Cot-poration

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Project

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DESIGN

MEMORANDUM

Water Treatment

.

-

-

pad outside the new operations building.

The generatorwill be housed in a weatherproof

enclosure.

-

S

-

-

-

-

Steel caw~lk~’will

be locatedat elevation 705.5, in the operating room, t&provide operator

access to the basins, filters,

and

flow splitter.

The catwalks will support the electrical conduit

and

chemical feed lines to eachprocess unit.

Stairs will provide access from the catwalks

to the

operating floor.

Any

portion

ofthe catwalk locatedLOverpiping will

contain a

removable floor to

allowthe bridge crane to access the piping.

-

-

-

The travelling bridge crane willbe mounted on ~tracks

as close as possible to the building eaves.

The crane-Will access any

equipmenf

located on the operating floor.

Equipment located in the

conditioned area on the mezzanine floor must be movedto the elevator

and

removed from the

building throughthe chemical area

unloading

dock.

-

VI.

WATER

TREATMENT

PLANT PROCESS

COMPONENTS.

-

The following-paragraphs provide brief descriptionsofthe treatment process components.

Provisions will be included in the design ofthe-newfacilities to accommodate the addition of

anothertreatment train in the future.

Hydraulic

and

design criteria are detailed in the next

-

section ofthis design memorandum.

.

-

A.

RAW

WATER SUPPLY

-

The

existing intake structure will

be maintained.

A new rawwaterpumping station willbe

constructed adjacent to the existing raw

water pump

station.

-,The existing pump- station will be

demolished once the new pump

station is operational.

•The newrawwater pump station will include space for four vertical diffusion vane can-type

pumps; if the plant is expanded in the future, oneofthe smaller pumps willbe replacedwith a

larger capacity

pump.

The

two

smallest pumps will be equipped

with

adjustable frequency

drive

units. Thepumps will be housed in an insulated

~netal

superstructure on

a

concrete foundation.

Roofbatches will be provided over each ofthepumps to facilitate removal.

-

-

The new pump station

will

have a designated electricalroom for location ofthe electrical

-

distribution equipment

and

adjustable frequencydrives.

The room willbe air conditioned to

maximize

the operational efficiency ofthe drives.

A480 V powerdistribution panel will be-

provided for theAFDs

and

all infrastructure loads.

A programmablelogic controller (PLC) will be provided at the pump station for monitoring

and

control ofthepumps.

The most likelymeans ofcommunication betweenthe PLC

and

the plant

controlsystem (PCS) will be over radio.

This Will allow the operators to monitor flow rates

and

maintain the pumpingrates remotely.0

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-

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Page 6

Project49807’

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DESiGN 1~EMORANDUM

Water Treatment

-

-

The two existing

12-inch

mains

from the pump station to the treatment plant willbe maintained.

-

A newraw water flow meter

will

be provided upstream ofthe new flow splitter.

-

-.

B.

PRESEDIMENTATION

BASINS

-

The existing 48-foot diameter softening basin will be converted foruse as a presedimentaton

basin.

The.two

smaller existing softening basins will be abandoned or demolished.

A rapid mix

chamber equippedwith a mechanical mixer will be provided upstream ofthepresedimentation

basin for chemical addition (alum).

Provisions for feeding sodium hypochiorite to therapid mix

(for odor control in the summer) will also be inCluded.

To accommodate modified plant

hydraulics, the elevation-ofthe top ofthe existing basin walls

will

need to be raised several feet.

The basin will be

modified

to increase the bottom slope to improve sludge collection.

Piping

will

include

provisions to allowbypassing around the presedimentation basin.

The existing

4-inch sludge dischargepiping will be replacedwith 6-inch diameter piping.

Flushing

connections

will be provided on the sludge piping to facilitate cleaning.

Residuals will be

discharged by gravity (if possible) to the modified.lagoons for dewatering.

-

The presedimentation. basin will be enclosed with an. aluminum dome for

security

reasons.

C.

FLOW

SPLITTER

-

-

-

Anewflow splitter willbe provided at the head ofthe treatment process to splitthe flow equally

between

thetreatment trains by the use ofbroad crested concrete webs.

Provisions for feeding

alum (or ferric) and sodium hypochiorite at the flow splitter will be included.

D.

SOFTENING BASINS

-

Water frOm the presedinientationbasins will flow to

two

softening basins equipped with circular

solids

contact-units. The equipment

will

include variable speed mixers

and

circular sludge

collection equipment.

Radial effluent launders with v-notch

weirs will

be furnished as a

part

of

the solids contactbasin equipment. Piping willbe configured to allow either ofthebasins to be

bypassed.

The sludge piping

will

be sized at 6-inch diameterminimum,-and -will, be equipped

-

with automatic

flushing connections.

Residuals

will flow by

gravity (ifpossible) to the modified

lagoons for dewatering.

Lime arid

alum -feed points will be provided at the

mixing well ofeach

basin.

-

-

Eachbasin will be provided

with walkways for access to

-the

basin drive equipment located at the

center ofeachbasin.

-

-

-

‘-

-

E.

RECARBONATION BASINS

--

Water

from the

softening basins

will flow to

two recarbonation.basins where carbon dioxide

will

be added to stabilize the water.

.

The basins-will be baffled -internally to

minimize

short

circuiting.

k &

Veatch Corporation

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Project 49807’.

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S

DESIGN

MEMORANDUM

Water Treatment

-

-

-

Pipingwill be configured

to

allow

bypassing of either recarbonationbasin for

maintenance.

Provisions for

draining

each reçarbonationbasin will be included.

A pHmeter will be provided

on the effluent ofeachrecarbonationbasin to control carbon dioxide feed rate.

--

F.

OZONE

CONTACTORS’

‘

-

.

-

--

Water from the recarbonation

basins

will flow to

two

ozone contact chambers.

A sidestream from the

main process flow-will

be injected with a high concentration ofozone

gas~

using eductors.

The gas/liquid

i~iixthre

will then be injected back into the main process

stream

-

justprior tO the water entering the contact chamber.

Ozone contact will be accomplished in a~

pipeline rather

than

a concrete basin.

Ozone will be generated on-site from vaporized liquid

oxygen (LOX).

A junction structure will beprovided downstream ofthe injectionpoint to strip

some ofthe unreacted dissolved ozone.

Off-gassesfrom each contact chamber will be collected

in the junction

structure and

routed through a common thermal-catalytic ozone destruct system

before being discharged to

the- atmosphere.

The junction structure will be equipped with afoam

suppressant system consisting of spray nozzles.

Calcium thiosulfate will be fed at the contact

chamber effluent to quench

any

remaining dissolved ozone residual.

Piping wiflbe cOnfigured

-

to allowbypassing of either ozone

train

for maintenance.

Eacl-i contact chamber will be equippedto allow sampling of dissolved ozone levels in multiple

locations along the length ofthe chamber.

Because ozone

gas

is a very strong oxidant, all metallic materials used in construction, with the

exception ofreinforcing steel embedded in concrete, will be ANSI Type,3l6 stainless steel.

The

contact chamberwill consist of ductile iron pipe lined with’ahigh silica cementmortar.

G.

FILTERS

-

-

‘

-

Four

deep bed, dual

media filters

will be provided.

Each filter box’

will

be equippedwith air-

water

backwash,

fiberglass washwater

troughs,

dual media (with granular activated, carbon

caps),

and

Leopold “Universal” or Roberts “hrflnity” underdrains.

The filters will also be

equipped for filter-to-waste.

-

:‘

-

-

S

,

-

Polyphosphate (sodium hexametaphosphate) will be fed at the filter influent

to minimize

scaling

ofthe filter media.

-

S

-

-

-

-,

-

-

-.

-

-

-

-

1.

Filter Controls andInstrumentation.

To support manual control, eaôh filter

will

be provided

with a

valve control station wall-mounted along the filter gallery.

Filter valves can

be

independently controlled by selector switches and

push buttons on. the station.

In,addition to

manual control, a networkcommunications port will

be provided at each filter for

connection

of

a single, mobile computer

workstation

for automatic control

and monitoring

ofthe filter valves

by the

plant controlsystem.

Filter controls will be electric operated butterflyvalves.

The

-

following instrumentation

will be provided forfilter controls:

-

.

-

Black & Veatch Corporation

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Project49807

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April

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Charleston,

illinois

Water

Treatment

a

Loss ofHead.

A loss-of-head gauge andrecorder will be provided at each filter.

The gauge

will measure loss ofhead across the filter.

The output will be sent to the plant control system

and will be one factor in. determining wheà abackwash shouldbe initiated.

-

-

b.

Local-Remote Selector Switch.

Bach filter will be provided with a “Local-Remote” selector

switch on the valve control station.

Inthe remote position, operation is from the filter

-

workstation.

In the local position, -selector switches lOcated on thevalve control stationwill

-operatethe valves for each filter.

-

,

.

-

-

c.

Filter Influent, Washwater Drain,

Wash Water, Filter-to-Waste and Air Wash Supply Valves.

Eachofthe noted valves will be provided with an “Open-Stop-Close” selector switch and

positionindicator.

-

The valve operation will be pro

gran~me,d

in the PCS to support automatic

backwash operation.

-

-

d.

Filter Effluent Rate Control.

Each filter will be .provide4

‘cs~ith

afilter effluent rate set, rate set

indicator, flowindicator, and “Auto-Close-Manual”.selector switch for the rate control valve in

the

filter effluentpiping.

Bach filter effluent

will

be equipped-with a frill body

type

venturi flow

meter.

The rate control valve will operate so that in “Auto”, the flow rate from all filters will be

maintained at an equal, predetermined (operator adjustable) setpoint while maintaining a-set

level

in the filter infl.uent piping.

In “Manual”, the flow rate from the

individual

filter will be

-

maintained-a±-the-setpoin±

entered at the filter workstation.

The “Clos&’ setting will close the

corresponding filter effluent valve.

-

-

-

-

-

e.

Wash WaterSupply.

The common wash water supplyheaderwill be fdrnished with a rate

controlbutterflyvalve

and

fill body

type

venturi flow meter.

The PCS

will control- washwater

rate set, rate set indicator, flow indicator, and “Increase-Decrease” flmctions.

In local control,

pushbuttons on a single valve control

stationwill jog the valve operator open. or closed to

manually adjust the flow late.

Inremote, the control system will

maintain

apreset positionwhen

-

there isno flow.

The valve operation will be programmed to support automatic backwash

operation.

“Start-Stop” controls for the wash watersupplypump will also be provided at the

-

PCS.

-

.

-

-

Automatic backwashing will allow for only one filter to be backwashed at atime.

To manually

wash afilter, the “Local-Remote”- selector switch for all filters must be in the manual mode.

Automatic backwash will be -initiatedmanuallyby the operator, afterwhich the control system

will- implement thebackwash sequence.

Automatic backwash,will include air scour and filter-to-

waste cycles.

In Remote-Auto mode, the plant control system will automatically initiate a filter

backwash based on either elapsedtime, loss ofhead, or turbiditylevel.

-

‘

-

-

f

Turbidimeters.

Each filter will be provided with a turbidimeter to monitor effluent

turbidity.

This information will be indicated andrecorded at the plant control system.

Black

&

Veatch Corporation

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Project498-07

April 18, 2001

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DESIGN MEMORANDUM

Water Treatment

-

H.

WASH WATER FACILITIES

Washwater will be pro~ided

by a constant sp~e4

centrifugal

pump that draws suction

fr6m

the

filter clearwell effluentpiping, prior to chlorine addition.

An emergency interconnect will be

provided between the washwater supplyheader

and

the high service pump dischargeheaderto

provide ameasure ofredundancy in the event that the wash waterpump is out ofservice.

,The

‘emergency interconnect will be equipped-with

throttling

valves or an orifice plate to regulate the

-

pressure and prevent disruption ofthe filter media.

Waste wash waterwillbe discharged by

gravity

to themodifiedlagoons.

-

-

-

-

-

WASHWATER RECOVERY

-

-

-

Waste filter ~vashwater

and

fllter-to-waste-*ater-.will-be collected in a’buried cast-in-place

concrete equalizationbasin (wash water recoverybasin).

Recovered water will be pumped by

two (one standby) submersible pumps, equipped with adjustable frequency

drives,

from the

recovery

basin

to the head ofthe presedirnentation basin.

A magnetic flow meter will be

provided on the pump discharge header.

Washwater return pump operation will be

automatically controlledbased on -leve.l in the washwater recovery basin and the plant influent

flow rate; manual control from the plant óOntrol room will also be provided. The wash water

recovery

basin

will overflow to the existifig surge lagoon.

This WasbwaterRecoveryBasin will

be bid as an alternative.

Ifthe alternative bid is not accepted, the existing wash water surge

lagoonwill continue to be used in it’s current’cotidition1

-

-

-

-

-

I.

LAGOONS

-

The eastern most existing sludgelagoon will be modified andconverted into six to seven new

smaller lagoons will be constructed in place ofone ofthe existing lagoons.

The lagoons willbe

narrow enough to allow dredging equipment to remove dewatered solids without having to enter

the lagoons.

Decant from the lagoonswill be discharged to Lake CharlestonifIEPA grants an

NPDES permit.

The need for pumping and pH adjustthent ofthe decantwill be evaluated during

detailed design.

The lagoon modificationswill be bid as an alternative~

-

-

-

J.

CLEARWELLS

-

Filter effluent waterwill be collected in two clearwells.

Provisionswill be included to allow

eitherofthe clearwells to be removedfrom service during operation.

Waterwill flow from the

clearwells to the existing treated water reservoir.

Fluoride will be fed at the clearwell effluent.

Sodium hypochiorite and ammoniawill be fed at the reservoir influent.

Level indication for the

clear-wells will be provided at the plant controlroom.

-

-

K

ULTRAVIOLET DISINFECTION

-

-

-

-

-

-

Provisions will be included on the clear-well effluent piping to

allow the addition ofultraviolet

-

disinfection modules in the

future.

-

~1~k

&

Veatch Corporation

Page

10

Project49807

April

18,2001

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Gh~r!eston,

-illinois

‘

Water Treatment

L.

HIGH SERVICE PUMPING

-

.-

-

-

A new high servicepumping statibu-

ill be..provid~cI,

~eqiiipped.wi~

four bLorizont-al centrifugal

pump~.

~ie4wo- -smil

mps-wi41~be~equipped-w-ith

-adjustable

ue~cy~drives,-the~rger

pumps will be constant speed.

The pumps will draw suction from pipeline connectiOnto the

treated. water reservoir.

The pumps will be provided with “Local-Off-Remote” selector switches.

In “Remote”, thepump

perationwill be controlledbased on the level in the West elevated tank

in ‘the distribution system or manually from the plant control system.

In “Local”, thepump

operation will be controlled locally at the pump:

A full body

type

venturi flow meter will be

provided on the high service pump discharge.

Each pump discharge will be provided with an

automatic check valve and an. isolation valve.

-

-

A cbl~the

resiçlual analyzer and pH meterwill be provided for thehigh service discharge

header;-and will be indicated andrecorded atthe plant controlroom.

Sodium hydroxide will be

fed at the high service discharge header for pH adjustment.

The corrosion inhibitor (Aqua Mag)

&irrently usedby the City will continueto be fed to’the plant effluent.

‘

M.

CEEMICAL

FEED

.

-

-

-

-

A

loading dock area will be provided to facilitate chemical delivery.

For bulk liquids, a control

panel

will heprovided,al the lnading.dock toindicate liquid. level in the correspondingstorage

tanks.

The following chemical feed system will be provided:

1.

Lime.

Lime will be delivered as 90

pure calcium oxide (quicklime) and stored in aroof-

mounted dual cone steel bin at the softening basins.

-

The bin will be filled from trucks equipped

for pneumatic unloading.

High and low level bin,indicators, bin vibrators, and a dust collector

will be provided on the bin.

Lime will be fedby gravity from the bin to two gravimetric belt

type feeder-slaker units.

Slaked lime will be fedby gravityto the mixing zone of eachbasin

throughtroughs.

The troughs will be configured to allow onefeeder to feed both basins (at a

lower dose)

at the same time under ómergency conditions.

Space will be provided for the

addition -of another lime storage and feed system for the thirdbasintrain in the future~

2.

Aluru.

Alumwill be delivered as a bulk liquid andwill be stored in one new fiberglass

storage tank located in. the new chemicalbuilding.

A concrete containment curb will be provided

around the bulk storage tank.

Two

transfer pumps (one standby) will transport chemical from

the storage thnk to two day tanks.

Alum will be fed-from the day tanks by four (one stan,dby)

metering pumps.

Space will be provided for additional bulk storage and a fifth metering pump in

the future.

Flushing connections will be provided on the alum piping to facilitate -maintenance.

3.

Sodium Hvpochlorite.

Sodiumhypochiorite will be delivered as abulk liquid and will be

storedin one new fiberglass storage tank located in the new chemical building.

A concrete

containméflt curb will be provided around

the

bulk storage tank.

Two transfer pumps (one

standby) will transport chemical from the storage tank to

two day tanks.

Sodiumhypochiorite

Black &Veatch Corporation

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Pr-oje~-498O7

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April

18,

2001

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charleston,

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-

DESIGN

MEMORANDUM

Water Treatment

-

—

will be fed from the daytanks by three (one

standby)metering pumps.

Space will be provide4

for additional

bulk

storage and metering pumps in the fixture.

-.

-

4.

Carbon-Dioxide.

The e-xistihg carbpn thoxide storágethliilcwill be maintained.

New

direct

-

gas

feeders will be provided, each consisting of an- electric modulating valve and flow meter for

automatic

control and a rotameter for manual feed capability.

The

feed equipmentwill be

located at therecarbonation basins.

Carbon dioxide feed rate will be controlled based on

-

-

maintaining-

apredetermined pH at the recarbonation basin effluent.

-

5.

Calcium Thiosulfate.

Calcium thiosuifate will be delivered in.

55

gallon drums as a 24

-

percent solution.

Three metering pumps (one standby)will

feed chemical directly from the drum

(mounted on ahydraulic load cell type scale, to the ozone contact chambers effluent.

6.’ Polyphosphate.

Polyphosphate (sodium hexametaphosphate) will be delivered as abulk

liquid andwill be stored in, onenew fiberglass

storagetank located in the operations building.

A

concrete containment curb will be provided around the bulk storage tank.

Two transferpumps

(one standby) will transport chemical frómthe storage tank to two day tanks.

Polyphosphate will

be fedfrom the day tanks

b~r

two (one standby) metering pumps.

7.

SodiumHydroxide.

Liquid

sodium

hydroxide will be delivered in two

330 gallon totes as a

25 percent solution.

Containment will be provided for the totes to protect against accidental

spills.

Two metering pumps (one standby)

will

feed the chemical from the totes to the high

-

service pump discharge header.

Flushing connections will be provided on the sodium hydroxide

piping

to facilitate maintenance.

-

-

8.

Ammonia.

Anhydrous ammonia will be delivered in. 150-pound pressurized cylinders.

Four

cylinder-mounted feeders (one standby) will feed,,the chemical directly from the cylinders,

mounted on ahydraulic load celltype scale, to the reservoir influentpiping.

-

9.

Fluoride. ,Fluoride (hydrofluosilicic acid) will-be delivered in.a 330 gallontote as a23

perceiit

solution. Two peristaltic type metering pumps (one standby) will feed the chemical from

the

tote

to the clearwell effluent.

Containment curb will be provided around the tote toprotect

against accidental spills.

-

-

-

-

-

10.

Corrosion Inhibitor.

Aqua Mag will be delivered as a solutiOn in. 55 gallon drums.

Two

peristaitic type metering pumps (one standby) will feed the chemical directlyfrom a drum,

mo-unted on a hydraulic lOad cell type scale, to the high service discharge piping.

N.

ELECTRICAL

-

-

-

-

-

-

-

-

The plant’s power distribution system consists ofan incoming utility feed and an engine-

-

generator servicing adouble-endedmotor control center (MCC) located in the basement ofthe

Operations Building.

In turn, -this

MCC

feeds an

MCC in the

existing basin building and

-

provides

power to the raw water pumping station.

The existing MCC will remain in service to

Black

& Veatch Corporation

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Page

12

Project 49807

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April 18, 2001

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Charleston,

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-

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DESIGN MEMORANDUM

Water Treatment

-

feed remaining existing loads at the Operations Building.

The incoming utility’linewill be re-

located from its existing locationnearthe high service pumping station to avoid a conflictwith

the newchemical feed facilities.

-

-

-

Them

tor-c

~ener~CC3~inside-the

existing-basin bi~ilding-will

be replac~d

with~a~new

-

unit

centrally located to the equipment thatwill remain in service after the expansion. The lack

ofworking space required by the NEC and the environmental hazards caused by the lime dust

are themain factors in determining

replacement. If

an outdoor loOationis chosen, the unit will

be provided with aNEMA 3R rated enclosure.

-

A newMCC will be provided in an electrical room located on the operating floor ofthe new

building.

Allprocess and infrastructure .equipment in the newbuilding willbe fed from this

MCC.

The newMCC will become the primary distribution unit andwill feed the existing HSP

MCC.

The

engine generator will be

relocated

and will tie-in to the new MCC with a-mechanical

interlocking scheme.

Distributionpower andlighting panels will be provided in centralized

locations throughout the building to minimize conduit and cable runs. It is anticipated thatthe

ozone generators and TJV equipment will re~juire

isolation transformers to reduce harmonics

introducedby the unbalanced loads on the power distribution system.

-

The transfonners will be

-

-

located as near as possible to the equipment and will be rated for harmonics reductions

Pad-

mounted transformers will be provided iflocated outdoors.

The electrical rOom will, be air

conditioned for more efficient operation ofthe APD‘s.

0.

INSTRUMENTATION &

CONTROLS

(I&C)

-

-

-

The I&C system designwill stress efflcient monitoring and control ofequipment andprodess

conditions. The plant will be provided with two control system server/workstationcomputers

locatedin the new control room.

The servers will run commerciallyavailable MMI software,

such as Intellution iPX

or Wonderware, and they will be set up in a dual-redundant arrangement

-

to provide increased system reliability.’ In additionto the control room, it is anticipated that

-

additional workstations will

be provided

in the new building office and the filter gallery.

Networkjacks will be placed in offices and

other locations for

future connections to the system.

Communications between the servers and workstations will be on an Ethernet lOBaseT network.

The server/workstation computers will communicate with a network ofPLCs distributed

-

throughout

the plant.

PLC locations

will be determinedby process area and

it is

expectedthat

they will be lqçated at the raw water pumping station, chemical feed area,

filter pipe gallery,

and

the control room.

In addition, the ozone

generation and future UV

systems are generally

providedwith dedicated PLCs

within manufacturer

supplied control panels.

All

ofthe PLCs will

be connectedto the PCS over a

data highway and will provide monitoring and limited control of

the systems.

-

-

-

The City of

Charleston

or the contractor will be responsible for all PLC, IvMI,

and network

softwareprogramming.

Black &Veatch Corporation

-

-

-

Page

13

Projett 49807

April 18, 2001

---

Charleston~

Illinois

DESIGN -MEMORANDUM

In general, -all equipmentwill

be operated in one ormore ofthe following controlmodes:

-

Local Manual:

The equipment is

manually and locally controlled from the motor starter

or a control station.-

-

-

-

-

-‘

Remote Manual:

The equipment is controlledmanuallythrough -the PLC based on

-

commands

issued

from. aPCS workstation.

-

-

-

-

-

-

-

Remote Auto:

The equipment is automatically controlledby the PLCbased on process

setpoints issued from

the operator

workstation.

The PLC will automatically adjust

process equipment to meet -the setpoint.

-

-

An,

I&C workshop will be held atthe

beginning

ofthe design phase.

-Differenttechnologies

and

control level options will

be introduced,

and general control descriptions

for eachprocess willbe

completed.

-

-

VII.

-

PROCESS AND

HYDRAULIC

DESIGN DATA

-

-

A.

PUMPING EQUIPMENT

-

-

Raw Water

(Reservoir) Pumps

Number

RatedCapacity, each

RatedHead,

feet

Type

Power Supply

Motor

Control

-

Sludge Recirculation Pumps

Number

-

Rated Capacity, each,

gpm

Rated

Head, feet

Type

‘

-

Power Supply

Motor

-

-

Control

-

-

Ozone Sidestream

Injection Pumps

Number

-

Rated Capacity, each,

gpm

Rated Head, feet

4 (one standby)

-‘

2

@

1.5

mgd,

1.

®

2 mgd,

-

1

@

5 mgd (standby)

-

135

-

Vertical

diffusion

vane, can type

-480V,3phase,6OHz

-

-

2®SOhp,

1 ~10Ohp,

1 ©200hp

-

Adjustable frequency

drive

on

two smallest

pumps; others willbe constant speed.

-

2

100’

10

-

Horizontal

end suction

centrifugal

480V, 3 phase, 60 Hz

-

-

-

Y2hp

-

Constant speed

3

tone standby)

175

25

-

Black & Veatch Corporation

Project 49807

April 18,2001

Page 14

Charleston,

Illinois

DESIGN MEMORANDUM

Type

-Power Supply

Motor

Control

Wash Water Supply

Pump

Number

Rated Capacity, gpin

RatedHead, feet

-Type

-

Power Supply

Motor

Control

High

Service Pumps

Number

Rated Capacity, each

Wash Water Return

Pumps (optional

bid item)

Number

-

Rated Capacity, each,

gpm

RatedHead, feet

Type

-

Power Supply

Motor

-

-

Control

B.

HYDRAULIC

DESIGN DATA

PlantCapacity

Design, mgd

Minimum,

mgd

Average,

mgd

Ultimate, mgd

Horizontal centrifugal

480V, 3

phase, 60Hz

2

hp

Constant speed

1

4060

25

Horizontal centrifugal

480V,

3 phase, 60Hz

40

Constant speed

4

(one standby)

2

@

1.5

mgd,

1

®

2 mgd,

1

@

5

mgd (standby)

200*

2

350

35

Submersible

480V, 3

phase,

60 Hz

5hp

-

-

Adjustable frequency

drive

Rated Head, feet

Type

Horizontal centrifugal

Power Supply

-

480V, 3 phase, 60 Hz

Motor

2@-75hp,1@lOOhp,1@2SOhp

Control

Adjustable frequencydrive

on

two smallest

-

-

-pumps; others will

be constant speed.

*Evalüatjon ofsystem losses or

existing

pump discharge-head is required

to

verify-rated

head ofnew pumps.

5

0.5

2.5

Black &Veatch Corporation

Aprill8,2001

Page 15

---

Charleston,

Illinois

DESIGN MEMORANDUM

-

Plant In.fluent (existing)

Number

Diameter, inch

Flow, each, mgd

Design

Ultimate

Velocity, fps

Design

Ultimate

Flow meter (new)

Number

Size,

in

Presedimentation Rapid Mix

Number

Design capacity, mgd

Width, ft

Length, ft

Side water depth, ft

Side wall depth,

ft-

Detention time, seconds

Mixer type

Minimum

velocity gradient at 32 F, sec~1

Power supply

Motor

Presedimentation Basin

Number

Design capacity, mgd

Diameter, ft

Straight side wall depth,ft

Depth at ceüter ofbasin, ft.

Detention

time, minutes

Equipment type

Power

supply

Web

type

Softening Basins

Number

-

Design capacity, mgd

Diameter, feet

Side

water depth, ft

1

S

5.5

-

5.5

8

9

30

-

Vertical shaft, turbine

orpropeller

500

480V,

3-phase, 60hz

-

-

50

-

1

(convert existing softening

basin)

5

-

-

48

-

-

13.25

(raise sidewalls for new plant

gradient)

-

23.75

73 (49 minutes at

7.5

mgd)

Circular sludge collector

480V, 3 phase, 60hz

Peripheral

2 initial,

1

future

41

12.5

Black & VeatchCorporation

Project 49807

April

Page 16

2

12

2.5

3.5

4:9

7.4

1

16

Magnetic

Type

---

Charleston,

‘Illinois

DESIGN

Water Treatment

Side wall depth, ft

-

13

‘

Water depth at center, ft

-

14.5

Detention time, minutes

60 (minimum)

-

-

Equipment type

Upflow solids contact

Floc~uati~n—z~ne

detention time, mm.

30 (minimum)

Design surface loading rate

®

2 ft

below

water surfaóe, gpth/sf

1.5

Webtype

‘.

-

Radial launders, v-notch

Design web overflow rate,

gprnlft

20 (maximum)

Mixer

-

Power

supply

480 V.

3 phase, 60 hz

Motor

.

2Ohp

-

Speed adjustment

-

Adjustable frequency drive

Sludge collection

-

Power supply

480 V, 3 phase, 60 hz

Motor

lhp

Recarbonation Basins

Number

-

-

-

2

initial,

1

future

Design capacity,

each, mgd

2.5

-

Diameter, ft

23.5,

Side water depth, ft

11

Side

wall depth, ft

12

-

-

Detention time, minutes

-

20

-

-‘

Ozone Generation System

-

Type ofgeneration

Liquid oxygen

Type ofdissolution

,

Sidestream injection

-

Numberof generators

‘

2 (one standby) (3 total ultimate)

Designcapacity,

each, mgd

5

-

Design ozone production capacity,

-

-

each, ib/d

-

150

Average ozone dose, mg/L

3.5

Design ozone concentration at

-

-

design production capacity, percent

-

10

Design ozone transfer efficiency, percent

93

-

-

Cooling water system type

Open loop

Ozone Contact Chambers

-

-

Number

-

-

2 initial,

1 ftttur~

Design capacity, each, mgd

-

2.5

-

Type

-

Pipelinereactor

Diameter, inches

-

54

-

Length,

ft, each

150

-

Btack & Veatch Corporation

Page

17

Project 49807

-

April

18, 2001

---

-~

_3

-

Charles

ton,

Illinois

-

bEsIGN

MEMORANDUM.

Water Treatment

Detention

time,

minutes

-

-

10

Liquid

Oxygen Storage

-

Number

1

Type

-

Pressurized, steel, vertical

Designcapacity,

gal

3,000

Days storage at avg dose, avgflow

68

-

Vaporizors

-

Number

2

Type

-

Ambient,

12hour duty

Filters

-

Number

-

4 initial, 2 future

Size

of

filter bed, ftx ft

14’9” x

14’9”

Water depth above media, -ft

5

ftminimum

Capacity, mgd, each

1.25

-

Design loading

rate, gpinlsf

4.0

w/ 1 filter out ofservice

-

5.33

Filter underdrain, type

Leopold orRoberts, HPDE, dual lateral

Valve type

Butterfly, electric actuated

Effluent flow meter

type

Full body venturi

Filter media, type &

depth.

-

-

Granular activated carbon

48

inches

Sand

.

12 inches

Support gravel

12inches

Filter to waste

-

-

Design rate, each, mgd

-

1.25

Design duration, minutes

10

Volume

perwaste cycle, gal

8,680

-

-

-

-

Clearwell

.

Number

-

2

Capacity, each, gallons

-

41,000 minimum

-

Sidewater

depth,

feet

10

WashWater Supply

-

-

-

Design

water rise

rate, in/mm

-

30

Designbed expansion,percent

-

50

Design flow, mgd

(gpmlsf)

-

6.3 (18.7)

Designwash duration,

minutes

10

Volume

per

wash,

gallons

40,600

-

-

-

Flowmeter

type

-

-

-

Fullbody

venturi

Rate controlvalve

type

Butterfly valve,

electric actuated

Black & Veatch Corporation

Page

18

Project 49807

-

April

18, 2001

---

Charleston,

Illinois

DESIGN MEMORANDUM

Water Treatment

-

-

-

-

-

-

Backwash Air

Number of

blowers

2

Designflow rate, each, scfnilsf

-

5

Airflowrate,

scfm

-

1085

Wash Water Recovery Basin (optional bid item)

Number

‘

-

-

-

-

1

-

Capacity, gallons

-

-

-

lQO,000

Residuals StorageLagoons

--

Average solids production,

drylbs

-

-

permgd

-

3,400

-

-

Avg solids concentration, percent

Lagoon influent

-

4

Dewatered.in lagoon

18

-

-

-.

-

Storage volume required, annual; ef

-

at 2.5 mEd averaEe flow

332,000

at-S mgd design flow

664,000

C.

CREI’4ICAL FEED

-

-

The average -and maximum dosages are based

on the current average

and maximum dosages

for

those chemicals currentlyused at the plant.

Ne* chemical feed systems will be designed ~‘for

the

maximum expected dose at the design flow capacity ofthe facility.

New chemical storage

facilities will be designed to provide aminimum of 30 days storage at average dose

arid

average

flow capacity for all chemicals except lime.

The

storagevolume for lime and. carbon dioxide is

based on providing approximately 14 days ofstorage.

l.Lime

Form

-

-

Quicklime,- 90

pure

Density, lb/cf

60

-

-

A~3plicatioñ

points

-

-

Softening basins

Avg dose, mg/i

-

as90CaO

165

-

-

asCaCO3

-

-

-

266

Average feed rate,

ibid

as 90

CaO

-

at avg flow, avg dose

,

3,440

Max dose, mg/i as 90

çaO

-

-

212

Max feed rate, Ib/d as 90

CaO

at

max flow,

max dose

-

-

8,840

Storage

‘

-

-

Number

of silos

-

1

-~

Capacity, tons-

24

-

-

Days storage at avg flow, avg dose

14

Black & Veatch Corporation

-

-

Page

19

Project 49807

-

April18, 2001

---

Charleston,

Illinois

-

DESIGN MEMORANDUM

-

Water Treatment

Feeder/slakers

-

-

Number

2 (one existing)

-

Type

Gravimetric feeder,paste type slaker

-

Capacity, each, lb/br

200

2.

Aluminum Sulfate (Alum)

-

.

Form

8 percent AI2SO4

Density,

lb/gal

-

-

11.1(5.34 lb

alumulgal solti)

.

Application points

Presedimentation basin (alternative

—

-

-

flow

splitter), and softening basins

Avg total dose, mg/I as AI2SO4

33

-

Avg total feed rate,

gallhr

solution at

avg flow, avg dose

5.4

-

Max total dose, mg/i as A12S04

-

55

Max total feed rate, gal/br solution at

-

max flow,

max

dose

-

17.9

-

-

-

Storage

-

-

-

Number

1

Type

-

-

Fiberglass, bulk tank

-

Capacity, each, gallons

4,400

-

-

Days storage at avg dose, avg flow

34

Transfer pumps

-

Number

-

2

-

Type

Magnetic

drive centrifugal

Capacity,ea,gpni.

-

10

Motor

Constant

speed,

1/4hp

Time to fill

day

tank, minutes

10

Day

tank

Number

-

2

Type

-

Fiberglass

Capacity, ea, gallons

-

100

Meteringpumps

-

-

-

Number

4

(one standby)

Type

Peristaltic

-

Capacity, ea, gpd

-

-

129 (presedimentation basin)

-

150 (each softeningbasin)

3:

Sodium Hypdchlor’ite

-

-

Form

Liquid,

12.5

-

-

Density, lb/gal

10 (1.04 lb

Cl2 pergallon solution)

Application

points

-

-

Flow splitter (optional) and

-

reservoir influent

Black & Veatcli Corporation

-

-

-

Page 20

Project 49807

April

18, 2001

---

Charleston,-

Illinois

DESIGN

MEMORANDUM

Water Treatment

-

Avg dose,

mg/I as Cl2

-

-

3

Average

feedrate, gal/hrof

solution

at avg dose, avg flow

2.5

Max dose,

mg/L

as Cl2

10

-

Maxiuiuurfeed-rate; gal/hr ofsolution

-

at

max dose, max flOw

16.7

-

-

-

Storage

Number

I

Type

Fiberglass, bulk (full trti.ck load)

Capacity, each,

gal

4,400

Days

storage at

avg dose, avg flow

73

Transfer pumps

-

-

Number

-

2

-

Type

Magnetic drive centrifugal

Capacity, ea, gpm

10

-

Motor

Constant speed

Time

to

fill

day

tank, minutes

10

-

Daytank

-

-

-

Number

-

2

-

Type

-

Fiberglass

Capacity,

ea,

gallons

100

Metering-pumps

-

-

Number

-

-

2

.

Type

Peristaltic

-

Capacity, ea,

gph

17

4.

Carbon Dioxide

-

:

Type

100,

compressed gas

Applicationpoint

Recarbonationbasins

Avg

dose, mg/I as CO2

-

37

A\rerage feed rate, ib/d at

avg

dose, avgflow

-

771-

Max

dose,

mg/L

as CO2

157

-

Maximum

feed rate, ib/d. at

max

dose,

max

flow

6,547

Storage

Number

1

(existing)

-

Type

-

Insulated, refrigerated, steel, bulk

Cápacity,lb

-

12,000

-

Days storage at avg dose, avg flow

15

-

Black & VeatchCorporation

-

Page 21

•

Project

49807

.

April

18, 2001

---

Charles

ton,

Illinois

Water Treatment

Feeders

DESIGN MEMORANDUM

-

Number

Type

Capacity, ea, ib/d

5.

CalciuniThiosulfate

Type

-

-

Density, lb/gal

Application points-

Avg dose, mg/i as CaS2O3

Average feed rate, gph at

avg dose, avg flow

Max dose, mg/L as

CaS2O3

Max feed rate, gph at

max dose, max flow

Storage

Number

Type

Capacity, each, gallons

Days storage at avg dose, avg flow

Metering Pumps

Number

Type

Capacity, ea, gph

-

.3

(one

s~tandby)

-

-

-

-

Manual rotameter; electric throttling

valve w/ mass flowmeter

-

3,500

•

-

Liquid,

24percent soiution

-

10.38

(2.5

lb CaS2O3per gallon

-

solution)

-

Ozone contact

chamber effluent

0.16

0.05

0.48

0.33

1

Drum

55

42

3

(one standby)

Peristaltic

0.17

6.

Polyphosphate

-

-

-Type

-

-

-

Application point

Avg dose, mg/i as 100

hexametaph.

Average feed rate, gal/hr as

solution

at avg dose, avg flow

Max dose, mg/L as 100

hexametaph.

Maximum feed rate, gal/hr as solution

at max dose, max flow

Storage

-

-

Number

-

Type.

Capacity, each, gallons

Days

storage at avg dose, avgflow

Liquid, hexametaphosphate, 10.7

Filter influentheader

1.5

1.3

5

8.7

1

Fiberglass, bulk

4,800 (full truck delivery)

154

Black & VeatchCorporation

April

Page 22

---

Charleston,

Illinois

.

DESIGN

MEMORANDUM

Water Treatment

-

Transfer pumps

-

Number

2

Type

-

Magnetic drive

centrifugal

Capacity, ea, gpm

10

Motor

•

-

-

Constant speed, 1/4hp

-

-

Time to fill daytank, minutes

-

7

-

-

-•

Day

tank

-

Number

2

Type

-

Fiberglass

Capacity, ea, gallons

70

Meteringpumps

Number

2 (one standby)

Type

-

-

Peristaltic

Capacity,

ea, gph

8.7

7.

Sodium Hydroxide

-

Type

-

Liquid,

25

solution

-

Density, lb/gallon

10.62 (2.66

lb NaOH/gal solution)

Application point

High servicepump discharge

Avg dose,

mg/i

as 100 NaOH

2

Averagefeedrate,

gph

at

avg dose,

avg flow

0.65

Max dose, mg/L as 100

NaOH

5

Maximum feed rate, gph

at~

max dose, max flow

-

3.3

Storage

-

-

Number

2

Type

Lined steel, totes

-

Capacity, each, gallons

330

Days storage at avg dose,

avg flow

42

Metering pumps

Number

2 (one standby)

Type

-

Peristaltic

Capacity, ea, gph

-

4

8.

Ammonia

-

-

-

Form

•

Anhydrous,

100

Application point

-

Reservoir influent

Avg dose, ing/l as 100

NH3

0.8

-

Average feed rate, lb/d at

avg dose, avg flow

-

17

Max dose, mg/L as 100

NH3

1.1

Maximum feed rate, Ibid at

-

max dose,

max

flow

46

Black & VeatchCorporatioii

Page 23

Project

49807

-

April

18, 2001

---

Charleston,

Illinols

-

DESIGN MEMORANDUM

Water Treatment

Storage

Number

4

Type

Pressurized cylinders

Capacity, each, lbs

-

-

150

Days storage at avg dose,

avgflow

35

-

Feeders

•

-

Number

2

Type

-

-

Direct gas, cylinder mounted

Capacity, ea, ib/d

50

9.

-Fluoride

-

Form

-

23

H2SiF6 (17.4

F)

Density, lb/gallon

10.0 (1.83 lb F/gallon solution)

Application point

-

Clearwell effluent

Avg dose, mg/i asF

0.9

Average feed rate, gph at

avg dose, avg flow

0.4

Max dose,

mg/L as F

1.1

Maximum feed rate, gph

at

max dose, max flow

1.0

Storage

-•

Number

1

•

Type

.

Tote

Capacity, gallons

-

330

Days storage at avg dose, avg flow.

32

Metering pumps

Number

2 (one standby)

Type

Peristaltic

-

Capacity, ea, gph

1.0

10.

Corrosion Inhibitor

Form

-

Solution; Aqua Mag

Density, lb/gallon

3.9 lb chemical per gallon of solution

Application

point

-

High service pump discharge

Avg dose, mg/i as 100

chemical

0.9

Average feed rate,

gph

at

-

avg dose, avgflow

-

0.2

Maxdose,nig/L

-

-

1.1

Maximum feed rate, gph at

-

max dose, max flow

0.49

Black & VeatchCorporation

Page 24

Project 49807

-

April

18, 2001

---

Charleston,

Illinois

-

DESIGN

MEMORANDUM

Water Treatment

Storage

-

Number

3

-

Type

-

Drum

Capacity, each, gallons

55

—

Days

storage at avg dose, avgflow

34

-

Metering

pumps

-

Number

2 (one standby)

Type

.

•Peristaltic

-

Capacity,

ea, gph

0.5

Black & Veatch Corporation

Page 25

Project 49807

April18,

2001

-

---

BLACK&VEATCH

DESIGN

MEMORANDUM

-

APPENDIX

A

Page 1

City of

Charleston,

IL

B&V Project49807.100

WTPUpgrade/ReplacementProject

.

B&V File E-1

Facilities

Inspection

-

-

-

-

February 22, 2001

RevisedFebruay 23,

2001

-

-

-

-

-

RevisedFebruaiy 27,

2001

Purpose

-

Black & Veatch engineers

Judy

Winger and Stephanie Kelemetc inspected the existing

water treatment plant and rawwater intake pumping station on February 6,2001.

The

inspectionwas

conducted to assess the current conditions ofthe facility and. evaluate the

feasibility ofincorporating them into theimprovements proposed for theplant.

The

findings and recommendations from this inspection are presentedbelow.

-

Electrical Distribution

-

The water treatment plant (WTP) powerdistribution system consists of a single incoming

overhead line from AmerenCPS.

Three single phase pole-mounted transformers

step-

down the deliveryvoltage to 480 V.

The pole is located in the access drive area for the

Chemical Feed Building making it difficult for delivery trucks to maneuver.

A service

disconnect switch and meter enclosure are panel mounted adjacent to thetransformers.

The disconnect andmeter appear to have been in use for some time.

The enclosures show

signs ofrust but are in fair condition.

The transformers appear fairly now and well

maintained.

The WTP staff

indicate

that persistently

-high

voltage is the only power quality

problem thatthey have experienced on the line side.

The.WTP -is at the end ofthe

AmerenCIPS distribution system, and the electric

utility

has had to boost the delivery

voltage to

maintain

their system.

Voltage measurements at

individual

motors are

consistently 504-5 10 V.

Continuously high voltage can reduce the overall efficiency ofthe

motors

and shorten their service life.

AmerenCIPS also provides a second electric service

feed to the Aeration Building near the rawwater

intake.

-

The WTP

has

an on site engine-generator that provides emergency backup power.

The

generator is rated at 480 V, 600 kW.

The

generator is cycled once each month and loaded

approximately twice each year.

A lack ofsubstantial recent power outages has precluded

theneed to operate the generator as abackup.

WTP personnel have observed during

regularmaintenance service that the engine-generator appears to be oversized for the

present distribution system.

The generator is not

fully

loaded when exercised.

The main power distributionpanel is a motor control center (MCC) locatedin the

Electrical Room in the- basement ofthe Filter Building.

The engine-generator and several

control panels are also locatedin the room.

The MCC is vintage mid-l980’s and is in

good condition.

The MCC has a main-main configuration with kirk-key interlocks.

The

engine-generator is not equipped with an automatic transfer switch and, thus, power must

be manually transferred in the event ofan outage.

Engine-generator controls, lighting

---

‘BLACK & VEATCH

DESIGN MEMORANDUM

-

APPENDIX A

.

Page 2

City ofCharleston, IL

.

B&V Project 49807.100

WTPUpgradeIReplaceinentProject

B&V File

E-1

Facilities Inspection

-

February

22,2001

-

Revised

Fébruä?y

23, 2001

-

RevisedFebruary 27,

2001

panelboards, and various

motor starters

are part ofthe MCC lineup.

Mechanicalmetering

is availableonthe engine-generator line. However, there

are

nomechanical or solid-state

metering options on

the incoming utility main.

The ElectricalRoom is equippedwith a

monorail and hoist

for equipment han.diin.g.

-

TheFilter

Building MCC provides power to

a second MCC locatedin the

Rapid

Mix/Lime

Building.

This MCC is

inpoor condition

due to its age

andproximity

tonearby

lime

feed

equipment.

The MCC is located on the south interior wail

ofthe

building with

approximately 3 feet ofworking space between the MCC andthe lime feed equipment.

Lime dust and equipmentwash-downhave attributed to cabinet and component corrosion.

The lack ofadequate working space

around

the MCCrepresents a potentially

hazardous

situation.

-

-

Panelboards and

dry-type

tranaformers are located in each MCCforvariDns -12O~\9oads,

including lighting and instrumentation.

WTP personnel indicatedthat the existing circuit

schedules needre-evaluation andupdating.

it is difficult to isolate circuits for equipment

maintenance due to panel schedule misinformation.

-

Raw Water- Pumping Station

-

The RawWater Pumping Stationis located near

theLake Charlestonrawwater intake.

-

-

The building is in

fair

to -poor condition.

The-building’s plywood ceiling is rotting and

delaminating, and floor drainage andventilation are very poor.

The two raw water pumps

appear to be at least 30 years old.

The largestraw waterpump has been totally overhauled

within the past 10 years.

Only the motor for the smaller pump has been overhauled within

this

time

period.

Both pumps are constant speed units.

The WTP must typically be shut

down several times each day, whenever the treated water demands

are-less than the

--

capacity ofthe smallest raw water pump, to prevent overflowing ofthe treated water

reservoir.

This practice ofintermittent WTP operation results in poorfilter performance.

The raw water pumps are powered from the Filter

Building

MCC.

The

electrical

equipment in the pumping station is in extremely poor condition.

Thereis standing water

in the building as a result ofleaking/sprayingpumps.

The motor starters arO inaccessible

from a safety aspect. If maintenance is required,personnel muststandbetween thepumps

and in the water.

The pump motors overheat and cut-out in the summer due to poor

ventilation.

-

-

-

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BLACK & VEATCH

-

DESIGN

MEMORANDUM

-

APPENDIXA

Page 3

City ofCharleston, IL

B&VProject49807.100

WTPUpgi~ade/ReplacementProject

B&V File E-1

Facilities Inspection

-

February

22,2001

-

-

RevisedFebruary 23, 2001

-

RevisedFebruary 27,

2001

The raw waterintake

structure

is locatedinacornerofthe lakethat

has

causeddeep

deposits ofsilt to form around the

structure.

Consequently, oiilythe highest ofthe intake

screens are usable.

The ability to deliver high quality raw water to theWTP is diminished

by the location ofthe intake, the shallow depth ofwater

around

the-intake, andthe inability

to draw waterfrom the lower intake screens.

-

Considering the age and the lack ofvariable speedcapability for the existing rawwater

-

pumps, the condition ofthebuilding,

andthe location and limitations ofthe existing intake,

the existing intake facilities shouldbe abandoned and anew intake andraw waterpumping

station should be constructed or the City should dredge around the existing intake and

construct a new raw waterpump station.

-

Rapid

Mix/Lime

Building

-

-

-

Theplant’s influent piping enters the rapid

mix

chamber in the lower level of

this

building.

Insufficient space for straight pipe

runs

on either side of the existing raw waterflow meter

-

probably results in inaccurate flowmeasurements.

The distribution

of

flow from the rapid

mix chamber to the softening basins is determined by hydraulic friction and fittinglosses

in the piping.

There is no positive means for measuring the flow to each basin, or for

producing a

uniform

distribution ofthe flowto the three

basins.

The situationresults in

non-uniform hydraulic loading ofthe softeningbasins and diminished overall

basin

performance.

-

-

-

-

-

-

-

-

-

-

-

The WTP has a single lime feed system with no spare orredundant automatic feed

-

equipment on line.

When equipmentproblems inevitably occur, the

plant staffmust

feed

lime

manually from bags.

The existing,lime feed equipment appears to be in generally

good condition-.

-

-

-

-

-

The poor and

potentially hazardous condition ofthe MCC located

in the Rapid

Mix/Lime

Building was previously described.

Several control panels and drives associated with the

lime

equipment are- located along the interior south-wall,

~hesepanels arein butter

-

condition than theMCC.

The alum feed pump and booster pump andpiping located in the

basement ofthe Rapid

Mix/LimeBuilding

are in poor condition and corroded.

The alum

feed system has no standbypump.

The basement areais very damp and poorly ventilated.

The superstructure ofthe Rapid

Mix/Lime

Building has significant cracking in the

masonry walls and large cracks in the concrete operating level floor slab.

-

---

~BLACK&VEATCH

DESIGN MEMORANDUM

-

APPENDIX A

-

Page 4

City

of Charleston,IL

-

-

B&V Project 49-807.100

WTP

Upgrade/Replacement Project

-

B&V FileB-i

Facilities

Inspection

-

-

February

22,2001

-

-

-

-

-

RevisedFèbruaiy 23,

2001

RevisedFebruary 27,

2001

Softening

Basins

-

The plant has three IDI

Accelator

type basins for lime

softening.

The two originalbasins

-

are approximately 28 feet in diameter; the thirdbasin, -addedunder a subsequent plantS

expansion, is 48 feet in diameter.

The basins are not covered and, consequently, collect

fallen leaves andother windblown debris thattends to plug the sludge piping.

The

concrete basins a±e

in generally good condition, with some cracking and spalling around

-

the top perimeter.

The southern-most basin, ispartially exposed-. above gradeand exhibits

cracking and calcification in the exposed wall, indicating potential leakage.

Some cracking

and leakage are also apparent in the basinwalls exposedin the gallery below the lime

building.

Thóbasin equipmentitself appears to be in good condition with minor corrosion

in. isolated locations.

Plant staff

indicate

that the gearboxes have had to be replaced several

times.

Eachbasin driveunit has a motor andmotor starter located on the basinwalkway.

The motors and starters appear to be in good condition.

Conduit to the equipmentis

painted galvanized steeL

Each basin has a temporary submersible dd-icing system.

Electrical

cords to the probes are strung along thebasin walkways.

The basins are litby a

roadway light and a single basinmpuntedpole light.

The basin residual piping and valving is located in the basement ofthe lime building.

The

valves are equipped with timers set to blow down residual

approximately 10 minutes per

hour

per

basin.

-

--

-

Recarbonation Basin

-

-

-

The

existing recarboriation basin is located west ofthe softening basins, below the loading

dock area.

Due to the piping configuration leading into and out of the recarbonation basin,

it appears that some short-circuiting maybe occurring.

In addition, the basin is too small

to provide adequate reactiontime.

It is likely that calcium carbonate from the softening

process is entering the-filters and appearing as turbidity in the effluent samples.

The water

-

surface elevation ofthis’ basin is roughly 4 inches below the overflow elevation.

Filter

Building

-

-

-

-

-

The Laboratory (Lab) is located

in thewest endofthe Filter

Building, on the main level.

The

east wall oftheLabhas

windows

looking out onto the filters. Along

this wall

is also a

row ofchart recorders for the clearwell

level and filter turbidities, selector switch control

for the

high servicepumps

and

the chlorine feeders. TheLabhas adesk

with two

-

---

BLACK &

VEATCH

-

DESIGN

MEMORANDUM

-

APPENDIX A

-

Page

5

City

ofCharleston,IL

-

B&VProject49807.100

WTP

Upgrade/Replacement Project

-

B&VFileE-1

Facilities Inspection

-

-

February

22,2001

-

RevisedFebruary 23,

2001

-

-

Revised February 27,

2001

computer workstations for

data

entry.

Limited open counter space andwork space is

-

available for the lab

staff

to perform

their

duties.

-

There are two BtE Filter Consoles located~

in the Filter Gallery.

Each console provides

manual andtimed controlfor two filters.

The consoles have selector switches- and

-

indicating lights.

Plant

staff

in.dicate that replacement

parts

for the filter controls are

difficult to obtain, due to the age ofthe equipment.

There is an. analyzer transmitter at each

console to provide local indication offilter turbidity.

Due to the qonfiguration

ofthe

parallel fllter~iiifluentpiping,

the two-western

filters tend to -get water directly from the

large clarifier, andthe two easternfilters tend to get water directly from the two smaller

clariflers.

-

The turbidities for the two western filters tend to be higher than for the two

eastern filters, indicating uneven loading ofthe clariflers.

-

The four filters are equipped with approximately

18 inches ofgranular activatedcarbon

(GAC) over approxin~ately

12 inches ofsand.

The filter media is supported over the

-

underdrain collection system by gravel support media.

Backwash water is supplied by

a.

pump located in. the Pipe Gallery, which draws

suctionfrom the treated water storage

reservoir.

The filters are also equipped for surfacewash.

The surfacewash pump takes

suction from the high service pump discharge.

The filter boxes are relatively shallow,

making

it difficult to- adequately expand the mediaduringbackwash to-provide effective

cleaning withoutwashing media out into thewash water troughs.

The filters are generally

backwashed at arate of21 00 gpm (approximately

11

gpm/sf) for

15 to 20 minutes.

Increasing the depth ofthe filter beds to improve performance wouldrequire raising the

elevation ofthe filters and all treatment processes upstream.

-

-

The ammonia feed room is located east ofthe Filter Gallery, on theupper level.

Thereis a

gas detector outside of theroom: however, it islocated above eye level.

-The weight scale

for the ammonia tanks has a mechanical readOut only.

Motor-starters and other electrical

equipment in the room are rusted and in poor condition.

There are not any HVAC alarms

associatedwith the gas detector.

-

-

-

-

-

-

Across the hail from the Ammonia Feed Room is a sample closet.

There are several

-

-

analyzers in this rOom, including Finished Water Chlorine and Finished WaterTurbidity.

Theyprovide local indicationandmost ofthe units are in.

fair condition.

---

-‘

-

~BLACK

~&VEA~TCH

-

DESIGN

MEMORANDUM

-

APPENDIX A

Page

6

Cityof Charleston, IL..

-

B&V Project49807.100

WTP Up-grade/Replacement Project

B&V File B-i

Facilities Inspection

February

22,2001

-

-

-

-

~REWs~d

Fe’brwary 23,2001

-

,RevisedFebruaiy 27, 2001

The High Service Pumps (HSP) are located between the

Filter

BuildingElectrical Room

and the Pipe Gallery on the lower level.

Two ofthethree pumps are constant speed.

The

third, and largestpump at 250 hp, has an adjustable frequency drive.

The drive is located

on the

east

wall ofthepump room.

The drive andmotor are in good condition although

there is little working room around. the drive and it is notin an easily accessible area.

The

washwater pump, also constant speed, is-located-adjacent to the high service pumps.

The

filter surface washpump is situated directly on the floor, adjacent to the south wall ofthe

high

servicepump area.

The plant staff has indicatedthat the small high service pump is

too small to meet system demands and keep the elevated tank full and, so, is rarely used.

The suction inlets for all ofthese pumps are located severalfeet above the bottom ofthe

treatedwaterreservoir, causing priming problems if

the

pumps are stopped and the

-

reservoirlevel is low.

Plant staff indicate that the pumps require ahigh level of

-

maintenance.

-

-

-

-

The plant compressed air system is located in the Pipe

Gallery

near the high service-

-

pumps.

No sound attenuation material or-acoustic enclosures have beenprovided;

consequently, noise levels in the-Pipe Gallery are very high.

-

The filter valves have pneumatic actuators, and are amix

of

butterfly and gate valves.

Plant staffhave experiencedproblems with plugging ofthe air supplylines to the, valve

actuators.

Each filter has a pressure analyzer and turbidimeter with transmitters mounted

on

the filter walls.

The filter piping is in generally good condition and exhibits little

corrosion, with the exception ofseveral valves and some of the filter-to-waste piping.

The

filter effluent valve actuators on several filters appeared to be leaking.

-

Adequate straight

pipe length is not available on either side ofthe filter effluent flowmeter, likely resulting

in inaccurate readings.

-

-

Hydrofluosilic Acid and Phosphate feed pumps -and drums are located on thenorth wall of

the Pipe Gallerywithin a few feet ofthe filter piping.

No containment curbs are available

for either system, and emergency showers

and

eyewash stations are not readily accessible

from the feed equipment.

Both systems have electric weight scales and digital readouts.

A boiler is located in an. open area in the basement to the west ofthe Pipe Gallery.

The

boiler electrical components appear in good condition.

However, to meet currentbuilding

code requirements, the boiler should be located in a separate roomwith adequate

-

combustion air.

-,

-

-

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---

BLACK & VEATCH

DESIGN

MEMORANDUM

-

APPENDIX A

‘

Page 7

Cityof Charleston, IL

B&V Project49807.100

WTP Upgrade/ReplacementProject

B&V FileB-i

Facilities

Inspection

February 22,

20Q1

Revised February 23, 2001

-

Revised Februaiy 27,

2001

Chemical

Feed Building

-

-

The Chemical Feed Building is located

south oftheFilter

Building and Softening Basins,

-

and

houses the sodium chlorite storage and feed room, the chlorine

dioxide

feed room, and

chlorine feed and storageroom.

The superstructure is in generally

good shape with

some

minor

cracking apparent in the masonry.

Ventilationin this building will not meet

current

building code requirements.

-

Emergency shower

and eyewash stations are not readily

accessible from the chemical areas.

-

-

The Sodium Chlorite Room is self-contained.

The drum scalehas dial indication and is

not automated.

The Chlorine Roomis located at the west end ofthe building.

There is a

gas detector located at the exteriordoor butthere areno alarm lights andhorns.

The

chlorine tank weight scales have local indication only.

EVAC in the room is m-ininial and

consists ofa ceiling fan, exhaust fan, and electric heater.

The Chlorine Dioxide Room is

located between the Sodium Chlorite Room andthe Chlorine Room, andis directly Open to

the Chlorine Roomvia severalmissing masonry blocks in the dividing wall.

The Chlorine

Roomis equipped with a davit crane; however, the room is very small and maneuvering

chemicil containers with the crane is difficult.

-

Th~

carbon dioxide storage t~nk

and-evaporator ate located~adjacent

to

the

Chemical

Feed

Building.

The equipment appears to be in good condition although it is unknown at this

point whether or not it can be -automated.

The bottom ofthe storage tank and some ofthe

-

piping were covered with acoating ofice.

-

--

-

-

Lagoon Pump Stations

-

-

Thepump stationfor

the surge lagoon, whichreceives waste filter backwash water and

residuals blowdown from thebasins, is located on the west side ofthe surge lagoon.

The

pump station is equipped with

two

submersiblepumps.

The vault structure is cracking and

the roofslab shows severe

spalling.

The electrical panels are mounted outside above the

vault and are corroded.

-

-

-

The

surge

lagoon pump

stationpumps theresiduals to the

lime

storage lagoons.

-

The

decant fromthese lagoons flows toapump stationlocated-ina vault southofthe eastern-

most

lime

lagoon, fromwhich

it is pumpedoff

site to

the.wastewater treatment plant.

The

vault

structure appears to be

ingenerally good condition. The electrical

panels

mounted

above

the vault show minor corrosion.

-

-

---

BLACK

&-VE-ATCH

‘

-

-

DESIGN MEMORANDUM

-

APPENDIX A

P3ge

8

City of charleston, IL

B&V Project 49807.100

WTP Upgrade/Replacement Project

-

B&V File E--1

Facilities

Inspection

-

February

22,2001

-

-

-

-

-

-

-

R~edPebruaiy23; -2001

-

RevisedFebruary 27, 2001

General

The plant has atelephone/paging

system that appears.to

be

in

good operating condition.

Lighting is less than adequate in some areas ofthe plant but for the most part is acceptable.

Ifthese areas ofthe existing building are incorporated into the final plan, it wouldbe

appropriate to replace the fixtures with newer more efficieht models.

Conduitis rigid

galvanized steel.

It is routed both exposed and concealed.

No accurate records exist of

concealed conduit locations.

There are no major concerns over corrosion.

-

The plant has a freight elevator located in the northeast corner ofthe Filter Building,

-

adjacent to the loading dock.

The loading dock elevation is too low to facilitate unloading

ofdelivery

trucks; no dock leveling equipment is available.

In general, limited, facilities

are available to assistplant staffinhandling equipmentthroughout the

plant.

Recommendations

-

It

is recommended thatthe power distribution

systemreceive attention duringthe

plant

upgrade/replacement.

Preliminary alternatives indicate a driveway for chemical delivery

inthe locationofthe existing

utility

transformers.

The

service shouldbererouted to

accommodate traffic. B&V will

coordinate with AmerenCIPS to determine thebest

location

and

alleviate topower qualityproblem.

The following paragraphs discuss modifications that should be made to the existing

facilities if they are

tobe incorporatedinto the finalplans fortheexpandedplant.

The Filter Building MCC is in good condition and is expected to remain in service.

Automatic transfer betweenthe utility and engine-generator would require extensive

- -

modifications to the existing controls and line-up.

It is recommended thatmanual

--

-

-

switchover capabilities be maintained.

An automatic switchover can be incorporatedupon

future replacement ofthe MCC.

-

-

-

-

-

-

Ifthe existing ifiters are

maintained, the wash water trough elevation shouldbe raised to

allow for

better media expansion duringbackwash.

Changing

filtervalve actuatorsto

electric operation

rather than

pneumatic shouldbe considered.. The ifitercontrol consoles

sbouldbereplaced

with

equipment that allowsfor a

higher

level

ofremotemonitoring-and

-

control. Raising the

trough

elevations maynotbe pracztical due to hydraulic profile

limitations

upstream.

-

---

BLACK &

VEATCH

DESIGN MEMORANDUM

-

APPENDIX A

-

-

Page 9

City ofCharleston, IL

-

B&V Project 49807.100

WI?

Upgrade/Replacement Project

--

B&V-FileE-l

Facilities Inspection

-

-

-

-

February22,2001

-

-

Revised February 23, 2001

Revised February 27,

2001

-

-

TheLaboratory shouldbeincreasedin size toprovidemore open counter and

work space

-

for lab

staff.

This

couldbeaccomplishedby

expanding the room into the open space

directlywest oftheFilter

Building or,

ifthe existing filters

are

not

maintained,

by

constructing

additional lab space over the.west filter

bay.

TheLime

Building

MCC

shouldbedemolished

and

replaced with anoutdoor, protected

aisle lineup.

This

will reducethenumberof

hazards and

improvepersonnel safety. The

existing arrangement does notmeet NationalElectric Code (NEC) requirements.

It is also

recommendedthat the electrical equipmentin the basement be replaced with NEMA 4x

ratedenclosures.

This wiil extend thelife oftheunits.

.An additional lime feeder/slaker

and alum metering pump should be provided for reliability.

-

Basin drive equipment does notneed replacement.

The basins should be enclosed.to

prevent collection of

windblown

debris and for improved security.

The basin

residuals

piping shouldbe replaced with larger diameter piping, equipped with automatic flushing

capability,

to minimize plugging problems.

A positive means of splitting flow betweenthe

basins, eitherby the use ofweirs orthrottling -valves with flowmetering, should be

provided to optimize basin performance.

-

-

Additional recarbonation basin capacity shouldbe provided to optimize stabilization ofthe

water prior to filtration.

Baffling should.be provided in the recarbonation basin to

minimize thepotential for short circuiting.

-

-

-

It isrecommended that upgradesbe made to the ChemicalFeed Building to meet code

requirements in regards to personnel safety, including ventilationrequirements, emergency

shower and eyewash station, andaccessibility.

The-eleptrical equipment appears to be in

good condition.

However, there is a needto provide further gas detection and alarm

lights/horns.

-

-

-

-

Proposedmodifications to theHigh ServicePumps include installation ofadditional

-

adjustable frequency drives to assist in adjustingplant output to betterfollow system

demands.

Space in a conditioned room is at apremium.

A location in the Electrical

Room

will be preliminarily ear-marked.

The constant speed motors are notinverter duty rated.

It

is recommendedthat those to be driven by AFDs be replaced.

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---

~LA~K

&

VEATCH

-

DESIGN MEMORANDTJM-APPENDXA

-

Page 10

City of

Charleston, IL

-

-

-

-

B&V Project 49807.100

-

YIPUpgrade/ReplacementProject

B&VFileE-l

Tacilities..Inspection

-

--

-

-

-

-

-

-

February

22, 2001

-.

-

-

-

-

-

-

-

-

Revised February 23

2001

-

-

-

Revised Febrziaiy27,

2001

All equipment in

theRawWaterPump

Stationneeds replacement.

Initial evaluation

indicates that AFDs for each pump may bebeneficial

iii

eliminating the need to-shut the

-

plant downwhen demand for treated water is less

than the raw water pump capacity.

The

drives cannot be located in the existing pump station.

Anew building will needto be

provided or they couldpotentiallybe located in the Aeration Building.

One drawback to

this option is modification that would be necessary to the existing building HVAC

-

equipment to accommodate the additional heat load.

-

-

Automation is severely lacking at the WTP.

Monitoring and controlling functions

-

currently available to the staff are very limited and outdated.

It is recommended that a

plant control system, which includes programmable logic controllers (PLC), human-

machine interfaces.~HN’fl),

and SCADA, be provided.

There

are several levels of

automation and these are best addressed once the treatment process has been determined.

As a general rule, all new equipment and instrumentationwill be provided with automatic

control andmonitoring functions.

Existing instrumentationthathas digitallanalog output

-capabilities will be interfacedwith the plant control system..

Remaining equipment,

including the filter consoles, motor starters, andfeed pumps, will be evaluated. in respect to

the automationphilosophy andrnodifledlupgraded appropriately.

A final item is the inclusion ofthe City’ a

1-MGwater tower into the’plant control system.

The tower is located approximately 2

‘-/~

miles from the plant.

Itis possible to integrate the

tower’s controls andmonitoring instrumentation to theplant control system.

A

preliminary evaluation suggests thatradio is themost likely option for communication

between the

two sites.

-

-

As-

apparentby

the level ofmôdiilcations required to upgrade the existing

facility

to

meet

the City’s needs and comply with code requirements, it maybe more practical and

potentially more economical to construct all new facilities.

Anew facilitywould also

simplify maintaining

the plant in. operationthroughoutthe

construction. period, reducing

theoverall constructionschedule

and associated cost.

-

---

Charleston,

Illinois

DESIGN MEMORANDUM

WaterTreatment

-

Opinion

of

Probable Construction Cost

•

-

~.

The opinionof probable construction costs for the

improvements to

the CharlestonWater Treatment

Plant

-is~onsistent.with.the

level ofengineering of

theDesign-Memorandum

The costs are estimatedfrom the

conceptual

designs available atthis

time.

Accuracy ofestimates should not be assumed to be based on

fmal 4esign features.

CostsWere derived

based

onthe information presented inthe

t)esign

•

Memorandum.

These costs include the constructiQn oftwo 2.5 thgd treatment trains

within apre-

-

engineered Operations building, theconversion oftheexisting 48-foot diameter softening basin for -use as

a

presedimentatiori -basin.

The treatment trains in the operations building consist ofa flow splitter,

two

-

softening banns, two recarbonation basins, ozone generation equipment, four dual media/deep b~d

filters,

high

service.~umps,

washwater supply and equipment,

sludge pumps, chemical feed systems,

electrical

equipment, instrumentation andcontrol equipment, and chemical feed systems.

Coats

for

an, UV

disinfection system, lagoon modifications, washwater recovery basins,

and anew scraper mechanism for

the presediznentation basin.have been included as optional costs.

A discussion ofthe c-ost estimate is

-

presented below.

-

-

-

-

-

-

-

General Requirements.

Items included within general requirements are

mobilization, supervision,

equipment rental, temporary facilities, and temporary utilities needed duringconstruction.

These items

can n.at be determined at this stage and havebeen -roughly estimated to be approximately 7 percent ofthe

total cost ofconstruction.

SitewórkandYard Piping. .Approximate quantities fOrsite

work andyardpiping were developed based

on theconceptual undeistsnding ofpipingsystems based on

this

design.memorandum. Unit costs

were

derived

from the RSMeans.Building

and

Construction CostData,

58t1~

Annual Edition, and

from similar

projects

designed

and

constructed

byBlack&Veatch. Quantities

are conceptual estimates.

ProcessEq-uipment (includes Piping, Pumps, Chemical Feed Systems. Electrical Systems.

-

-

-

Instrumentation and Controls, and necessax:v appurtenances).

Equipment costs were obtained from

manufacturers where possible- based on

the

process designdeveloped in the

DesignMemorandum.

If

-

budget

cost~

were not available from

the manufacturer, equipment costs were developed based on

simitar

projects

designed and constructed by BlaCk & Veatch as well as

RSMeans

Electrical CostData, 23~~

Annual Editiba.

Electrical-and Instrumentation cOsts were based

on. projects of similar Size

and

-

comp-lexity~adjusted to reflect expected electrician laborrates in Central

Illinois

based

on input from

various contractors andpr.edicted based on aelectrical system consisting ofsimplified,controls, -wiring

andequipment arrangement. Costs are

not

based- on

full detailed specifications ofactual equipment that

wilt be furnished, rather manufacturers planning level ofbudget estimates.

-

-

-

-

-

Operations Building.

Costs

for the construction ofanew operations building were derived from the

RSMeas Building

End

Construction Cost Data,

58th

Annual Edition, andfrom projects similarly designed

and ~oiis~ructed

byBlack &-Veatch.- Cost is based

onaoonceptual,floor plan

and

theexpectation that

during finaidesign

amore efficient, compact, layout will be accomplished requiring an enclosed area of

approximately

21,000 square feet underroof.

Contingencies. A contingency

has been added

to

the total probable constructioncost

to

account for

items

which tilay have been inadvertently

overlooked, underestimated, or seen

as

negligible. This contingency

also allows for any

unforeseen changes that may arise during

the

detailed design ofthewater treatment

plant improvements.

-

Black &

VeatchCorporation

-

-

Page

1

Project49807

April 24, 2001

---

CHARLESTON,

ILLINOIS

WATER TREATMENT

PLANT

IMPROVEMENTS

-

DESIGN

MEMORANDUM

LEVEL

OPINION OF PROBABLE

CONSTRUCTION COST

APRIL 24, 2001

SUMMARY OF COSTS

-

-

-

-

GENERAL

REQUIREMENTS

SITEWORK

YARD

PIPING

-

RAW

WATER

PUMP STATION

-

RAPID

MIX CHAMBER

PRESEDIMENTATION BASIN

FLOW SPLITTER

-

OZONE GENERATION

DUAL MEDIA/DEEP

LIME

FEED

POLYPHOSPHATE

SODIUM

HYDROXIDE

-

AMMONIA

FLUORIDE

CORROSION INHIBITOR

LIQUID OXYGEN

-

WASHWATER SUPPLY

-

OPERATIONS BUILDING

$470,000

$225,000

$320,000

$230,000

$20,000

$130,000

$15,000

$505,000

$75,000

-

$85,000~

$475,000

$835,000

$205,000

$100,000

$40,000

$35,000

$20,000

$10,000

$35,000

$10,000

$25,000

-

$10,000

$50,000

—

$580,000

$1,290,000

SUBTOTAL

-

SUMMARY

OF COSTS

CONTINGENCIES

TOTAL

$7,300,000

OPTIONAL COSTS

including

General

Requirements & Contingency

Lagoon Modifications

-

$400,000

UV Disinfection

System

-

$400,000

New

Scraper Mechanism in Presed. Basin

$215,000

-

Washwàter

Recovery

-

-

$225,000

---

Black ‘Veatch

Charleston, Illinois

Water lretment Plant

-

-

Basis of Design Memo

Probable Construction Costs

May 10, 2001

-

Page

1

B&V Project

49807.100

B&V

File A

This memorandum

provides the basIs for the Construction Costs fOr the Charleston, Illinois

Water treatment Plant.

-

I-tern

Description

-

GENERAL

REQUIREMENTS

Assume approximately 7

of

Total

-

Total

-

General Requirements

Use

Quantity

Unit

Unit Cost

Total Cost

410000

470,000

-

SITEWORK

Bulk Excavation

Bulk Site Fill

Import Site Fill

Paving

Sidewalk

Seeding

Grading

Landscape

Site

Prep

Miscellaneous

Total

-

Sitework

Use

CY

CY

CY

SY

SF

SY

SY-

Lump Sump

-

Lump Sump

Lump Surrtp

-

10

-

7

20

30,000

30

60,000

4

1

3,600

1.25

11,250

25,000

-

5,000

-

-

-

2,500

229,550

-

225,000

YARD

PIPING

5000

5000

1500

2000

1800

3600

‘155

I

I

I

170

2

2

I

LF

-Each

Each

Eadh

-

LF

Each

Each

- -

Each

24”

DIP Pre-Sed Bypass

-

15,500

18” x

24”

Reducer

2,500

18” x

18” Tapping Sleeve’and Valve

.

-

-

7,000.

30”

x

24”

Tee

-

-

-

3,500

24” DIP

to Flow

Splitter

-

17,000

24” DIP

90

Bend

-

-

-

5,700

24” x

16”

Reducer

-

-

5,000

24” Wall Pipe

-

3,000

Wash Water Piping

-

-

-

-

-

18”

DIP

Washwater

Drain

170

LF

100

-

17,000

18” x

12” reducer

I

Each

1500

1,500

12” x 12” Tapping Sleeve and Valve

I

Each

6000

6,000

6” DIP WWRB to Splitter

375

LF

-

40

-

15,000

100

-

2500

-

7000

3500

-

100

2850

-

-

2500

3000

-

5/24/01

---

BlackVeatch

-

Charleston, Illinois

Water Tretrnent Plant

-

-

BasIs of Design

Memo Probable Construction Costs

May

‘10,-~00I

Page2

-

6” DIPSIudge to replace ex 4”

-

850

LF

40

34,000

6” DIP Force Main from Accelator

120

LF

40

4,800

6”

CheckValve

-

-

2

Each

900

-

1,800

Valve Vault 4’ Manhole

I

-

-

-

Each

-

5000

-.

5,000

6” DIP Recarb Drain

-

100

LF

40

4,000-

6”

Gate Valve

-

6

Each

-

-

800

4,800

54” Ozone Pipe

335

LF

250

83,750

54” 90

Bend

4

Each

-

5000

20,000

Curb Inlet

3

Each

-

2500

7,500

-24” RCP Storm Sewer

450

LF

100-

45,000

MI~ceIlaneous

-

-

Lump Sum

Total

-Yard Piping

319,350

Use

-

320,000

RAW

WATER PUMP STATION

-

-

-Pumps

-4

Vert. Pumps

various sizes

5 MGD

I

Each

20000

20,000

-

2MGD

-

I

Each

11150

11,150

1.-S

MGD with AFD

2

-

Each

10000

20-~00Q

Pump

Installation

Lump Sum

9,000

Process Piping (from similar pump stations

in Bloomington & Lakeville)

42,300

Structure

(20 x 25 x $120/SF) (BIdg, Slab on grade, HVAG

& Plumbing)

90,000

Wetwell

-

Lump Sum

25,000

Miscellaneous

-

Lump Sum

10,000

-

Total

-

Raw Water Pump Station

-

227,450

Use

-

230,000

PRESEDIMENTATLON

RAPID

MIX

-

-

Assume 30 seconds at 0.8 mgd, 10 Hp mixer

-

Concrete

Floor (1

CY x $350/CY)

-

350

Concrete WaIls (4 CY x $450/CY)

-

1,800

Concrete

Susp Slab (1

CYx $550/CY)

-

-

-

550

Rapid

Mix

Equip (From IWC Quote for 10 Hp Mixer)

--

15,000

Excavation

(15 CY x $1

0/CY)

-

-

150

Baókfill (11

CYx $7/CY)

-

Miscellaneous

2,500

Total

-

Rapid Mix Chamber

-

-

20,450

Use

-

20,000

5/24/01

---

Black Veatch

Charleston, Illinois

Water Tretnient Plant

Basis of Design Memo Probable Construction Costs

May10, 2001

Page 3

-

PRESEDIMENTATION BASIN

-

-

-

Demolish Existing Equipment

-

5,000

Raise Existing Walls (2WCY-x $450/CY)

-

-

-

-

-

-

1Z600

--

Launder Sus~ended

Slab

(17 CV x $550/CY)

-

-

9,400

Launder Walls

(15 CV x $450/CY)

-

-

6,800

V-notch Weir (135

LF x

$4OILF)

-

-

5,400

Modify

sludge hopper & sludge

piping

13,000

Modify Inlet Piping

-

16,000

Aluminum Basin Cover (1810 SF x $30/SF)

-

55,000

Miscellaneous

-

-

2,500

Total Presedimentation Basin

125,700

Use

-

-

-

130,000

FLOW

SPLITTER

-

Concrete Floor Slab

(9 CY x $350/CY)

-

3,000

Concrete Walls, (25 CY x $450/CY)

11,000

-

Miscellaneous

-

-

1,000

Total

-

Flow Splitter

15,000

Use

15~000

SOFTENING BASINS

-

-

Equipment Quote from lDl for 2

-

2.5 mgd

basins

345,000

Equipment Installation

(30

of material cost)

100,000

-

Painting (Based upon cost of $115000 to paint 130’ basin)

-

60,000

Total

-

Softening Basins

-

-

505,000

SLUDGE

PUMPING

-

-

-

Assume I

pump per basin train plus I

standby

-

Three sludge pumps (similar pumps

at

Bloomington & Jo.Co.)

-

-

5Q,000

-

Piping

-

25,000

Total

-

Sludge Pumping

-

75,000

RECARBONATION BASINS

-

-

Equipment Quote from

US Filter for 2

-

2.5 mgd

basins)

-

40,000

-

Installation Cost 30

of material

-

-

12,000

Painting (Based upon cost of $115000 to paint I 30’ basin)

-

35,000

Total

-

Recarbonation

Basins

87,000

Use

-

-

85,000

5/24101

---

Black Veatch

Charleston,

IllInois

-

Water Tretment

Plant

Basis of Design Memo

Probable Construction Costs

MaylO,200l

-

Page 4

OZONE

GENERATION

EQUIPMENT

Based

on quotes from various

equipment suppliers

Lox

-

Ozone,generation equipment 2-5 mgd units

@

I

5Olb/day

Miscellaneous

-

Total

-

Ozone Generation Equipment

-

Use

-

-

460,000

-

15,000

-

475,000

DUAL

MEDIAIDEEP BED GAC FILTERS

-

Unit price for filters is derived from the Eden Prarie

MN

plant (1 Omgd) unit price of $780/SF

and the Fargo,

ND (30 mgd) unit price of $670/SF.

The unit price includes the structure,

media, piping, and valves.

-

-

Charleston will have deeper beds and will

use GAC instead

of anthracite, therefore for

budgetary estimates the unit price is adjusted to $825/SF.

-

Air,Water Backwash price

is based upon Lakeville MN (10 mgd) cost of $171,600

Filters,

including structure, media, piping, and valves:

(870

SF x $825/SF)

Air/Water Backwash

Equipment

-

-

Miscell~neous

Total

-

Dual Media/Deep Bed GAC Filters

Use

717,750

100,000

17,500

835,250

HIGH

SERVICE PUMPS

LIME

FEED

Average dose of 1651b/mlb

-

Average feed rate of

I 65x8.34x2.5mgd

=

3440

~10

days storage

=

24 tons

Use

two I

000lb/hrfeeders for redundancy

30 tOn lime bin (from Fargo ND plant)

one 1000 lb/hr feeders (from Manhattan KS) (reuse exist)

Installation

(incid

relocation of ex feeder)

-

Total

-

Lime Feed

25,000

45,000

-

30,000

100,000

Pumps -4 Horiz.

Pumps various sizes

5 MGD

I

Each

-

27000

27,000

I

MOD

-

I

Each

15000

15,000

1.5 MGD

2

Each

12000

24,000

Pump

Installation

-

30,000

Piping (from similar pump station in O’FaIIon)

-

100,000

Miscellaneous

-

8,000

Total

-

High Service

Pumps

204,000

Use

-

5/24/01

---

~3g

-

Black Veatch

Charleston, Illinois

-

•

-

Water Tretment Plant

-

Basis

or Design Memo Probable Construction Costs

May10

2001

-

•

-

Page5

-

ALUM

-

-

-

-

-

Provide bulk storage tank and metering pumps feeding directly from tanks

-

Avg.

dose

=

331b/mlb x 8.34 x 2.5 mgd

=

688.05 lb/day

30 days storage

=

4000 gallons (truckload)

-

Storage Tank ($5/gallon x 4000 gallons)

-20,000

Two metering pumps ~

10,000 each (from

CO springs)

-

-

20,000

--

Total

-

Alum

-

-

-

-

-

-

40,000

SODIUM

HYPOCHLORITE

-

-

-

-

Total

-

Sodium Hypochlorite