Development of Chemical Precipitation Operation and Maintenance Costs:

Maintenance Labor and Maintenance Materials

Total operating and maintenance costs are the sum of the following cost elements:

(1) Operating Labor Costs

(2) Maintenance Labor Costs

(3) Maintenance Materials Costs

(4) Chemical Purchase Costs

(5) Energy Costs

(6) Sludge Disposal Costs

(7) Compliance Monitoring Costs

This Excel workbook consists of the following worksheets:

kpk 013 - CP O&M costs

Not FGD WWT Systems

Not CP Systems

Data Too Incomplete

Eliminated from Analysis

Notes

Additional information regarding the query performed to extract pertinant information from 

the Steam Electric Survey Database.

Documents Steam Electric Survey data excluded from use in developing the elementspecific cost factors because the data represent treatment beyond chemical precipitation 

of flue gas desulfurization wastewater.

This Excel workbook document's EPA's derivation of cost elements (2) and (3) using information provided in response to 

the Steam Electric Survey.

EPA determined maintenance labor and maintenance materials costs for each plant by multiplying plant flow rate by the 

element-specific cost factors developed as described in this workbook. 

Documents the development of element-specific cost factors for cost elements (2) and (3), 

using certain plant responses to the Steam Electric Survey. To select plant responses 

used to develop the cost factors, EPA started by extracting operating and maintenance 

costs for all wastewater treatment systems for plants operating chemical precipitation 

systems (as marked in B7-4). Next, EPA excluded from the dataset records for those 

wastewater treatment systems that do not treat FGD wastewater, systems subsequently

determined by EPA to not use chemical precipitation, and plant responses that were too 

incomplete or otherwise inappropriate for use in this analysis.

Documents Steam Electric Survey data excluded from use in developing the elementspecific cost factors because the data do not represent treatment of flue gas 

desulfurization wastewater.

Documents Steam Electric Survey data excluded from use in developing the elementspecific cost factors because the data do not represent treatment of flue gas 

desulfurization wastewater using chemical precipitation.

Documents Steam Electric Survey data excluded from use in developing the elementspecific cost factors because the data are too incomplete for use.
ce Costs:

nant information from 

oping the element

hemical precipitation 

rovided in response to 

 plant flow rate by the 

t elements (2) and (3), 

t plant responses 

g and maintenance 

mical precipitation 

records for those 

stems subsequently

onses that were too 

oping the element

oping the element

oping the element-
FGD_Wastewater_Treatment.pl

ant_id plant_name WWTS Type

4679 Dominion - Chesterfield Power Station 1-stage

3831 RRI Energy Keystone Generating Station 1-stage

7884 Hatfield's Ferry Power Station 1-stage

3196 Cayuga 1-stage

8308 Miami Fort Station 1-stage

14 Gibson Generating Station 1-stage

7785 Seminole Generating Station 1-stage

2550 Allen Steam Station 1-stage + bio

8661 Belews Creek Steam Station 1-stage + bio

9161 John E. Amos Plant 1-stage, but 2 clarifiers

6283 Pleasant Prairie Power Plant 2-stage

1402 Conesville 2-stage

4543 Mountaineer Plant 2-stage

1236 Mitchell Plant 2-stage

3265 Cardinal 2-stage

1381 EME Homer City Generation L.P. 2-stage + bio

* See DCN SE01825.A45 'CBI_WWT System Flows.xlsx'

Information not original to this query of the Steam Electric Survey, but calculated from other i

provided in this worksheet.

Element-specific cost factor used in the Steam Electric cost model.
cbi_WWTS_Info Annual Flow 

(gal/yr) * cbi_FGD_wwts_tech FGD_wwts_tech_chemprecip cbi_WWT_ID

FALSE 10,890,000 FALSE -1 FALSE

FALSE 18,720,000 FALSE -1 FALSE

FALSE 38,736,720 FALSE -1 FALSE

TRUE [Redacted] TRUE [Redacted] TRUE

FALSE 91,980,000 FALSE -1 FALSE

FALSE 183,960,000 FALSE -1 FALSE

FALSE 197,280,600 FALSE -1 FALSE

FALSE 108,000,000 FALSE -1 FALSE

FALSE 249,660,000 FALSE -1 FALSE

FALSE 117,936,000 FALSE -1 FALSE

FALSE 8,119,200 FALSE -1 FALSE

FALSE 26,308,800 FALSE -1 TRUE

FALSE 54,834,000 FALSE -1 TRUE

FALSE 92,475,000 FALSE -1 FALSE

FALSE 146,016,000 FALSE -1 FALSE

FALSE 56,270,016 FALSE -1 FALSE

urvey, but calculated from other information 
WWT_Systems.System_ID Plant_Desig Pond_WWT_OandM.plant_id

WWT-1 FGD WWT Plant 4679

WWT-1 FGD WWT 3831

WWT-1 FGD WWT 7884

[Redacted] [Redacted] [Redacted]

WWT-1 FGD Wastewater Treatment 8308

WWT-1 WWT 14

WWT-2 Purgewaer Treatment 7785

WWT-1 FGD WWTS 2550

WWT-1 FGD WWTS 8661

WWT-1 CPS WWTP 9161

WWT-2 FGD WWTS 6283

[Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted]

WWT-1 CPS WWTP 1236

WWT-1 FGD CPS WWTP 3265

WWT-1 WWT 1381
Pond_WWT_OandM.System_ID cbi_Pond_WWT_OandM OM_Opr_Annual OM_Other1

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 FALSE 312833 Misc. operating expense

[Redacted] TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-2 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-2 TRUE [Redacted] [Redacted]

[Redacted] TRUE [Redacted] [Redacted]

[Redacted] TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

WWT-1 TRUE [Redacted] [Redacted]

Min [Redacted]

Max [Redacted]

Mean 493,976

Median [Redacted]
OM_Other1_

Annual

OM_Opr_Annual 

($/million gal)

OM_Opr_Rate_

Hours

OM_Opr_Staffing_

Workers

OM_Opr_Staffing_

hpd

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

54891 $9,493 55 1.3 24

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[Redacted]

[Redacted]

$6,498

[Redacted]
OM_Opr_Staffing_

dpy

OM_Opr_Rate_

Hours

OM_Opr_Staffing

_Workers

OM_Opr_Staffing_

hpd

Opr Labor 

(hr/day)

Annual Opr 

Labor 

(hpy/million 

gal)

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

184 55 1.3 24 31.2 293.9846223

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Min [Redacted] [Redacted] [Redacted]

Max [Redacted] [Redacted] [Redacted]

Mean 46.41 55.72 234.74

Median [Redacted] [Redacted] [Redacted]
OM_Opr_Staffing_

dpy

OM_Opr_Labor_

Annual ($)

OM_Opr_Labor

_Annual 

($/million gal)

OM_MLabor_

Annual OM_Other1 OM_Other1_Annual

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

184 $315,744 $8,151 -999

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$520,858 $7,432 65,570.11

[Redacted] [Redacted] [Redacted]
OM_MLabor_

Annual 

($/million 

gal)

OM_MLabor_

Rate_Hours

OM_MLabor_Staffing_

Workers

OM_MLabor_Staffing_

hpd

OM_MLabor_Staffing_

dpy

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

-999 -999 -999 -999

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[Redacted] Min

[Redacted] Max

$2,625 Mean

[Redacted] Median
OM_MLabor_

Rate_Hours

OM_MLabor_Staffing_

Workers

OM_MLabor_S

taffing_hpd

OM_MLabor_S

taffing_dpy

Maint_Labor 

(hr/yr)

Maint_Labor 

(hpy/million 

gal)

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48.04 1.94 5.90 228.24 5.07

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]
OM_Mlabor

_Annual ($)

OM_Mlabor_A

nnual 

($/million gal)

OM_MMaterials_

Annual

OM_MMaterials_

Annual ($/million 

gal)

OM_Chemicals_

Annual

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

[Redacted] [Redacted] [Redacted] [Redacted] [Redacted]

15197 $392 86358

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107,534 2,268 68,167 $1,299 $323,424

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OM_Chemicals_Annual 

($/million gal)

OM_Energy_Pump_

Annual

OM_Energy_Pump_

Annual ($/million 

gal)

OM_Energy_Pump_

kWh

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$2,229 -999 -999

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$4,060 $377

[Redacted] [Redacted]
OM_Energy_Pump_

Consump_kWh/h

OM_Energy_Other_

Annual

Sum Energy 

Annual

OM_Energy_

Other_Annua

l ($/million 

gal)

OM_Energy_O

ther_kWh

OM_Energy_Other_

Consump_kWh/h

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-999 -999 -1998 -999 -999

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$482

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OM_Energy_Comsump_

Total_kWh/hr

OM_Energy_Comsump_Total_

kWh/hr/million gal

OM_Steam_

Annual

OM_Steam_p

ounds

OM_Steam_

Consump_p

ounds/hr

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-999 -999 -999

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656,865 8,526

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OM_HazDrdg_A

nnual

OM_HazDrgd_R

ate

OM_HazDrgd_R

ate_Per

OM_HazLandfill

_Annual

OM_HazLandfill

_Rate

OM_HazLandfill

_Rate_Per

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-999 -999 No Answer -999 -999 No Answer

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OM_NonHazDr

gd_Annual

OM_NonHazDr

gd_Rate

OM_NonHazDrgd_

Rate_Per

OM_NonHazLandfill_

Annual

OM_NonHazLandfill_

Rate

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-999 -999 No Answer 42000 -111

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OM_NonHazLandfill_

Rate_Per

OM_Other1 OM_Other1_A

nnual OM_Other2 OM_Other2_Annual

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No Answer Misc. operating expense 54891 Misc. Operating costs 13000

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OM_Total_

Annual

[Redacted]

[Redacted]

524279

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All plant-level data has been removed from this tab as a result of CBI sanitization. All data for wastewater tre

to not treat FGD wastewater is considered CBI or CBI deducible.
ta for wastewater treatment systems determined 
All plant-level data has been removed from this tab as a result of CBI sanitization. All data for 

wastewater treatment systems determined to not be chemical precipitation systems is considered CBI or 

CBI deducible.
ion. All data for 

ems is considered CBI or 
All plant-level data has been removed from this tab as a result of CBI sanitization. All data for 

wastewater treatment systems determined to be too incomplete for use in the analysis is 

considered CBI or CBI deducible.
All plant-level data has been removed from this tab as a result of CBI sanitization. All data for 

wastewater treatment systems eliminated from this analysis for other reasons is considered CBI or CBI 

deducible.
itization. All data for 

sons is considered CBI or CBI 
Notes

Contains data from the following survey questions:

A1-1 Plant Name

B7-4 FGD purge wastewater treatment

D2-7 WWT system definition

D5-3 WWT flow rates

D6-2 O&M costs

Purpose: Factor calculation. Lists flow rates and O&M costs for all WWT

systems at plants that have CP systems (as marked in B7-4).for all WWT

systems for plants that have CP systems (as marked in B7-4). Note: while only

plants with CP systems are included, some of these plants have multiple 

treatment systems, including non-CP systems. All of the systems (including