L:ruLed SIMa

Envlronmenw ProIbCQoa

ACeoc:y

AIr

Offic:e of Nt Qualicy

PlanNnl and SWtdards

Research Trianale Part. NC 27711

GUIDANCE FOR

EQUIPMENT LEAKS

COSTING SOFTWARE
•

TABLE OF CONTE~TS

SECTION PAGE

1.0 PURPOSE OF DOCUMENT 1-1

2.0 CALCLTLATION OF COST . 2-2

2.1 COST METHODOLOGY. 2-2

3.0 DATA INPUT 3-6

3.1 EQUIPMENT COUNT INPUT . 3-7

3.2 DEFAULT INPUTS. 3-8

4.0 REFERENCES . . . 4·9

LIST OF TABLES AND FIGURES

TABLE

2-1 Base Cost Data for Equipment Leak Control Devices.

2-2 Base Costs and Assumptions for a Leak Detection Program

2-3 Derivation of Annual Costs for Control of Equipment Leaks

PAGE

2-4

2-5

2-5

3·1 Equipmem Count Inpuu. . . . . . . . . . . . . . . 3-7

3·2 Default Baseline Emission Factors. . 3·8

3·3 Default Monitorinl Frequency Valuea . . . . . . 3-9

FIGURE PAGE

3-1 Spreadsheet Layout . . . . . . . . . . . . .. . . . . . . 3-9

u
i

""- 1.0 Pl.:RPOSE

The purpose of this document is to provide documentation for the calculation of

impacts from the control of Volatile Hazardous Air Pollutant (VHAP) emissions from

equipment leaks. The document is designed to be used with a Lotus 1·2·3 for Windows

program.

Both the program and this document are based on previous work done on

calculating the impacts for control of \'HAP from equipment leaks for the Hazardous

Organic NESHAP (HON). The equations used in the spreadsheet are based on the same

costing equations and assumptions used in the development of HON impacts. nus was

done in order to assure common basis for comparing estimated HON equipment leak

costs to costs calculated by projects using this document and its associated spreadsheet

The equations used in the spreadsheet and this document are based on a

memorandum from RadiID Corporation to David Markwordt on June S, 1991. The

memorandum is titled Impacts from the Control of VHAP Emissions from Equipment

Leaks in Non-SOCMI Process Units for HON. The memorandum may be found in the

HON docket under the entry number ofA·92-45, n·B·ll.

1·1
•

•

2.0 CALC1JLAnON OF COSTS

The methodology for calculating equipment leak impacts is based on three steps. The steps used are as follows:

• Step 1. Use Section 114 letters to collect actual equipment leak count data

from facilities, or d~velop estim~tes of equipment leak counts by other .

methods. One posslble method is to select the appropriate HON model

plants provided in the spreadsheet as a rough representation of the industry

you are developing impacts for.

Step 2, Determine current level of control for the facilities (i.e. no control.

eTa level of contro~ or MACT level of control). This may done through

the use ofsection 114 information. or a review of State Rules.

Step 3, Based on information from the first two steps, control costs,

baseline emissions, and emissioDS reductioDS, are estimated using

equipment leak count based algorithms which were developed for the

evaluation of SOCMI precesses.

The algorithms are built into the equipment leaks costing softwue contained in a

Lotus Spreadsheet The cost methodology including the assumptions for equipment

costs, labor rates etc. are presented in section 2.1. The data is presented primarily in

tabular format Appendix 1presents all costing equations and emissions calculation

equations used within the software.

2.1 COST METHODOLOGY

All costs calculated within the equipment leaks software are based on annualized

1989 dollars. This is done in order to provide a common baseline for comparing the

estimated impacts for standards using this software with the estimated impacts from

imposition of the HON.

Costs for reducing emissiODS from compressoD, open-ended lines, sampling

connections. aDd pressure reliefdevices are developed assuming control equipment will

be installed. Cosu for reducina emissions from pumps, valves, and connectors are

developed assumjng emissions will be reduced through work practices. The general

methodology is to determine bue costs for the control of emissions for each type of

equipment. The base costs per component are then used with plant equipment counts to

develop capital and annual costs for the control of emissions from equipment leaks for

each plant

2·2

,I
Table 2-1 presented on the next page presents the cost associated with the

purchase and installation ofspecified equipment for the control of voe emissions from

compressor seals, open-ended lines, sampling connections, and pressure relief devices.

The base costs presented were taken directly from the Hazardous Organic NESHAP. All

cost estimates are based on July 1989 dollars using the ratio ofthe CE Plant Cost Indices.

Table 2-2 shows the assumed cost inputs such as labor, monitoringi'requency, initial leak

frequency, etc. While Table 2-3 shows the derivation of annual cost for such factors as

the capital recovety cost, annual maintenance cost, annual operating cost, ete. The tables

are intended to provide only a brief overview of assumed cost factors used in the

calculation of equipment leaks for more detailed information on the cost methodology

please read chapter 3: Hazardous Air Pollutant Emissions form Process Units in the

Synthetic OiganiC Chemical Manufacturing Industry - Background Information for

Proposed Standards (Volume 1B: Control Technologies).
TABU 2-1. BASE COST D."TA FOR EQL'[P~tr;"1 UAK CONTROL Dn-1CES

Equlpmel2t Type: Item

CoJt

(Jllly 1989 5)

Cornpresson. closed Vetlt s....ne::Il for dcg:u.swg resa'YOlt"S

12::! mm of 5 l-ern schedule 40 steel pIpe

!nsWJ1UOO (66 btl

i"l-..ree 5 I<Ill cut steel plug vLlves

tnsullauotl (6 bt)

One melll gauze Oame am::nor

Lostall&t1OQ (10 bt)

TOTAL.

1.090

1,490

2..1.10

115

862

22S

6,2·U

5261 03t100ft pipe CE Ir.dex (356 01(425)

166 hr/IOO 1\ pipe Labor' 522 SOIht

S783 75/vLlve CE lodex (3S6.01'342.S)

2 hr/\'&lve L.abor S22.S01ht

10190 quote 0(S869 00 CE lodcx (3 56.01) 58 i)

Labor HZ.SOfar

Opc:n-<"::lded lines: Otle 2.S<m gate valve

[r.sallauCtl (1.4 ht)

TOTAL.

70

Jl

102

S67 5Otvl1ve CE index (JS6.01342.5)

I 4 hrlvuve- Labor S22.S01hr

Sunple c.oanc:cticxu;; closed pur~ JYSLCD

15m o( 2.S<m x.bedu.le 40 r.cd pipe

1nstaI.I&tioo (I -bt)

1br!:e 2.S-an ball vLlves. carboa steel

ln$t,Il,rioo (6 bt)

TOTAL,

25

2l

267

95

409

SI20 6Ul00 1\ pipe

12.6 hr/lOO n

S8S.60tvLlve

1.4 htlnlV'C

Labor S21.SO

10190 quote of S2JSI3·pa CE Er.dcx (356 an58 4)

10/90 q~ of SS83iboider CE todex (JS6.0n58 ':')

lipd&le!rom SOCM! NSP5 AID CE [nrlcx

(]S60/224.7)

lipd&le !rom SOCM! NSPS AID CE lode<

(l56.otl24.1)

Wxx 122.501br

$385 6Otvalve- CE lDdcx (]56.0IJ42.S)

I S hrlv1J.ve- I..&ba- S22.S0far

535 631t.ce., S11.7J/e1bow CE lDde'x (356.0134 2.S)

One 0 6-an bleed vLlve, e&rboD nod 360

p~ fe"tiC! xm (Qi:W uzUl):-rupl;l.n disk I.Ul:mbly

i 6<m SUJ.O.le:s3 r.«ll'\IPture disk 78

One 7 6-cm carbon steel rupture disk 579

holder 24

One 0 6-cm pre:uure ga~, diLl (ace 40

!nsuJlanoo (16 he) 40 I

One 7 6<:n gate vLl"'1: 34

I=..n.t>oo (1.S br)

Othet: ooe 10.2-cm tee aod cu IO.2<m 49

01_

In.nallotioo (8.5 br) 191

TOTAL: l,iSS

'~relic! X:I1s (~ uzut); DeW ILDCmbly plus. oew n:Ud vLlve-.

Oc.o 7 6-= ••ml... sud body IOd lrUIl l.950 lipd&le fr= SOCM! NSP5 AID CE [nrlcx

re~dvLlve (35601l24.T)

115

tnsullanoo (10 btl 3.930

TOTAL

l Aboc' S22. SO pc=' bcu'

If
( (

TABLE 2-2. BASI!: COSTS AND ASSUMPTIONS FOR

A I.I!:AK DE1·ECflON PROGRAM

TABLE 2-3. DERIVATION 0 ..' ANNUAl.. COSTS "'OR CONTROL

OF EQUlrMENT LEAKS'

Capital rccovay (1CCOf (or capilal charges

0.58 III Capllal

0.23 III Capilal

o163 K Capilal

o 163 III Capllal

0.S8 K Capital

O.OS III Capital

Est.imalcd Nwnbu of Leaks per

Proc;css Unit III 0.75 III $110 per seal

$4.280

0.04 III Capital

0.Q4 III Capital

0.~8 III AnnuIJ Maintc:rwtCC Charge

I

$2.00IComponcntlMOIUlonng

$22.S0IHour

J 4 III (ConIJ'aetor Fee +Subsequent

Repair Charges)

Market value" lC Mass of VOC

saved

Ml1fket valueb II Mass offlAP

saved

• Rupture disks

• MonilOring instnunenlS

• OdaCOftIrol equipmmt

• Initial labor

• Initial replacanc:nt seals

AmwaI mainacnana: charges

• Conuol equipment

• RepllCa'm pump seals

Annual misc:cllancous charges(IUCS, insW'aocc, IdmUuslration)

• CoRtroi cquipmau

• MoniJoring cquipmcol

• ReplKCmClAl pump seals

Annual OpcrIlinS Cost

• Contractor monitorinS fcc

• Subscqucm Rpair labor charges

• AdnUniscraaive and suppon

Ra:ovay CRdilS

• VOC raw ma&eriallproduct cost

• HAP raw materiaIIprodua cost

$6,500

30scdpump

S22.SOJbr

20pcrc:cal

2.1 pc:rcx:al

II." pc:n;ml

6.S pc:n:aII

10 percent

O.S perc:ad

2 pcn;aal

2pc:rc:cal

Subcontr.aor mooiloring (ee:

Iwtlal moruloring

All subscquc:nl monstonng

MoniaorioB Crequc:oaes

Pumps

Conoa:tors

Valves

lrutial leak fRqucocics

Pwnps

Coonc:d.ors

Gash'apol valves

usbJliquid valves

Leak fieque:ncia (subjccl to initial

I1lOOItonng):

Pumps

ConDCttors

Gaslnpor vaJves

ltght bqwd valves

VISuaJ UlSpccltOO o(pwnps

Tame:

L.abor clwge

•from Reference 46

... • Depends on the specific chenucals used and the composition of the process Slream

a

2·5
3.0 DATA [~-PUT

3.1 EQL'1Pl\1ENT COUNT INPUT

The equipment leaks spreadsheet is divided into seven sheets. The first five sheets

are visible when you first open the spreadsheet. Two additional sheets are hidden at first

and contain macros used for performing various tasks in the spreadsheet. In order to

access the password spreadsheet (which contains macros for setting passwords and

viewing the costing calculations) you will need a correct password. This password can be

obtained from John Schaefer at (919) S41-0296. Figure 1. shows the layout of

spreadsheet pages as organized by the tabs used in Lotus 1·2-3 version 4.0 fo'r Windows

and later releases.

FIGURE 1. SPREADSHEET LAYOUT

Displays table of' eOIlCCSltl Ibr Sblet diJpLayI ealcaWect co"

che spreadabect to &llow ~id f'or til. equip.'lIt lat eoaCi

lCeCSI to otller abeetl lAd....... neared iD tile Equip••t p....

I I

Sheet u.aed to iDpat eqwp••t Sheet display. the total

leak eoullts ill. rhi. i. the oilly

area oC the spreadsheet that iDpati

are aeceesary to estimate impactl.

COlltliAa equipmellileak

coati Cor HON moelel pUti.

CIA be eopieel diRct1y to til.

Eqwp.at PII' to ~Ite coltl

butel 011 moelel pllAti.

I

aet colC of aU the impactl fbi. abeet COIlWDI help

cl1cu1&Ced Cor r.cilities 011 screeu IIld ICIlc:ra1 iDCormatioD

the Colt Estimate. Pile. aboat the spre&dabeet.

To calculate the cost for a facility you must first input the number ofequipment

components into the table provided in the equipment sheet Table 4 lists the inputs that

should be provided for each column in the equipment sheet. Ifthere are no pieces of

equipment for a given equipment type then the input space should be left blank.

/
Facili

Location

State

Current Control

Level

Pump Seals

Com ressor Seals

Flan es

Valves

For the Cost Estimates sheet no input is required. However, for every line that

you have inputed equipment a facility the costing equations must be copied to using the

copy and paste buttons on the gray tool bar. First push the copy buttoD, then select the

lines for which you want to calculate costs for a facility entered on the equipment page.

Once this has been done simply push the paste button to paste the costing equations into

the selected rows.

Model Plant data is set up to be copied direttly into the equipment leaks page.

The data is in the same format as the data on the equipment leaks page, you can use the

following directions to copy the model plants: highlight the model plant you wish to

copy, then select edit and copy from the top menu, next simply go to the first column on

the equipment page into which you wish to paste the data and select edit and then paste

from the main menu.

3.1 DEFAULT INPUTS

The default inputs in the spreadsheet are those inputs that allow the user to change

some of the underlying costing assumptions used in spreadsheet algorithms. These

assumptions are the emission factors, the recovery credit value, and th~ frequ~ncy of .

equipment monitoring. The assumed values may be changed by selectIng the informanon

page and then pushing the emission factocs, recovery credit. or moni~ring ~e~uency

\...- buttons. The emissions factors are used in the calculation of the baseline emlSSlOns and

3·7
the eso.mated erruss10ns reduction due to unposition of \{..o\CT controls. Changmg the

emissions factors will affect the calculated net annual cost and the COSt effect1 veness.

The recovery credit is simply the value of the chemical feedstock or product prevented

from released to atmosphere due to imposition of controls. The recovery credit is

calculaled by calculating the value of a megagram of recovered product. Due to a unique

mix of cherrucals controUed by eacb standard a new recovery credit should be calculated

for each standard. finally the rnon.itoring frequency is the frequency that valves, pumps,

compressor seals, and pressure relief devices. Cbanging the monitoring requencing

affects the operating costs (i.e. reducing the frequencing lowers the cost, wbile raising the

frequency increases the cost.),

The default inputs are based on values used and documented in the HON. lli

emjssjon factors and monitorina frequency values should oot be chanied unless you have

developed adequate documentation to support your changes. The default vaules for

emission factors are presented in Table 3·1 and the default monitoring frequencies are

presented in Table 3·2, The def.ult recovery credit value is based on the value

calcul.ted for the HON. Since, the value of chemicals recovered will be different for

e.ch standard a new value should be calculated for each standard.

TABLE 3.2.DEFAULT BASELINE EMISSION FACTORS

B F....n ...

CTG MACT 1->

UnconlroUed ConlroUed ControUed

Enuinmenl Service rka!hr\ rk -",-, Ou!fhrl

Ivalves 0... 0.0056 0.002 0000122

LiAAt Liauid 0.0071 0.004 0.000711

Heavv Liauid 0.00023 0.00023 0.00023

)Pump Seals Lillht Liauid 0.0494 0.0331 0.00248

Heavy Liauid 0.0214 0.0214 0.0214

rompressor Seals GaslVannr 0.228 0.153 0.0223

r:essure-Retief-Devices- GasIV. 0,104 0.0582 -0

'"anneeton IAu 0.00083 0.00083 0.000345

bnen-<:nded Lines All 0.0017 0 0

Ioamptina Connections All 0.015 0.015 0

iE'roduet AccumuWor Light Liquid 0.0323 0.0323 0

3-8
TABLE 3·3. DEFAULT MONITORING FRE JUENCY VALUES

Frequency

of

Monitoring

Eauinment Service (times/vr)

:Valves Gas 12

Li2ht Liauid l~

Pumo Seals Li2ht Liauid 12

Compressor Seals GasNaoor 2

Pressure Relief Devices GasNaoor 1

- ~AJI I

•

3·9
~.O REFERE~CES

IU.S. Environmental Protection Agency. Hazardous Air Pollutant Emissions from

Process Units in the Synthetic Organic Chemical Manufacturing Industry •• Background

Information for Proposed Standards. Volume 1B:Control Technologies. Emissions

Standards Division. November 1992. EPA-4S0/D·92·016b.

4--10
APPE~DL'X 1 . DERIVED EQt.:ATIONS

The following symbols are used throughout the foUowing section.

CCOMP =

CPRV =

COEL =

esc = c, =

CCON =

eVQ =

C\ln =

Compressor Count

Pressure Relief Valve Count

Open-Ended Line Count

Sample Connection Count .

Pump Count

Connector Count

Valve in GaslVapor Service Count

Valve in Light Liquid Service Count

CAP/TAL COSTS

The capital costs are divided into two models one for controlled units and the other for

uncontrolled units.

UncontrQlled Unita

Monitoring Instrument:

Compressor Vent System:

Pressure Relief Devices:

Open-Ended Lines:

~ample Connections:

(CCONP)x(S6,242.46/compressor)

(C"w)x(S77.74+S3,8S2.0l/pressure relief valve)

(CoeJx(SlO1.66/cap)

(Csc>x(S408.61/sample connection)

Summinr These:

Capital Cost =

Controlled Uoits

[(1)x($6,5OO) + (CCOMP)x(S6,242.46) + (Cl'l.v)x($77.74+S3,852.01) +

(Com,)x(SlO1.66)'" (CSC>x(S408.61)]

Monitoring Instrument:

Compressor Vent System:

Pressure Relief Devices:

Open-Ended Lines:

SO (Controlled Units have instruments)

(Ccowp)x(S6,242.46/compressor)

(CPltv)x(S77.74+$3,852.01)/pressure relief valve)

SO (controlled units have caps in place)
Sample Connecnons: (Csd"(S408.6 Lsample connection)

Summm~ These,'

Capital Cost = (CCoMP)x(S6.242.46) + (CPRv)x(S77.74+S3,8S2.01) +

(CsC>x(S408.61)]

ANNUALIZED (AnTAL cask

The annualized capital costs were detennined by multiplying the capital cost term for

each type of equipment by the capital recovery factory (CRF) for that type of equipment.

For uncontrolled units the cost of an initial LOAR event was annualized and added to the

annualized capital cost.

The CRF values are

0.58 for rupture disks and pumps seals

0.23 for monitoring instruments

0.163 for all other types of equipment and initial LOAR labor

UDGootrglled Volta

Monitoring Instrument

Compressor Vent System:

Pressure ReliefDevices:

• Disks

• Holder Valves, etc.

Open-Ended Lines:

Sample Connections:

Gas Valves:

• Monitorm.g1

• Repair

Liquid Valves:

• Monitorini

• Repair

Pumps:

• Monitoring

(1)x($6,5OO)x(0.23)

(CCOflGl) x($6,242.46/compressor)x(O. 163)

(C",v)x(S77.74/pressure reliefvalve)x(O.S8)

(C",v)x($3,852.0 l/pressure reliefvalve)x(0.163)

(CoeJx(S101.66/cap)x(0.163)

(C~x(S408.611sampleconnection)x(0. 163)

(Cvo)x(S2.S0/valve)x(1.4)x(0.163)

(Cvolx(O. 114)x(O.25)x(4)x(S22.S0)x(1.4)x(O. 163)

(Cvt.)x(S2.S0/valve)x(1.4)x(0. 163)

(CvJ x(O.065)x(O.2S)x(4»)(S22.50)x(1.4)x(0.163)

(C,)x(S2.S0/pump)x( 1.4»)(0.163)

" I
• Repau

• Replacement SealsJ

Connectors:

• Monitoring

• Repair

(Cp) x(0.2)x(0. 75)x( 16»)(S22.50)"(lA)- (0.163)

(Cp) x (0.2) x(O. 75) x($ lS0.00/seal) x(0.S8)

(CCoN)x(S2.50/connector»)( 1.4»)«0.163)

(CCON) x(0.021) x(0.25»)(2»)($22.50)x( 1.4»)((0.163)

InUla! [DAR Toem js rhen

(Cvo)( 1. 156)+{Cvt.)(0.904)+(Cp)(28.553)+(CCON)(O.624)

11wl

Annualized Capital Cost = [(S6.500)x(0.23) + (CcOMP)x(S6.242.46)x(0.163) ..

(CPRV) IC($77. 74)x(0.58) + (CPRv)x(S3,SS2.0 l)x(0.163) + (CoEJ)(S10 1.66)x(0.163)

","<Csd x(S408.61)x(0.163) + (Cvo)x(1.1S6) +(CyJx(O.904) + (C,)x(28.553) +

(CcoN)x(O.624)]

1 Initial LDAR monitoring costs are caleulated as:

(Component Count)x(SubcontJ'actor Monitoring Fee)x(40% Increase for

Administtation and Support)x(Capital Recovery Factor (CRF])

2 Initial LDAR repair costs are calculated as:

(Component Count)x(Initial Leak Frequency)x(Fraction Requirins

Repair)x(HoUlS for Repair)x(Labor Cost [SIhr])x(4001'o Increase for Administration

and Support)x(Capital Recovery Factor [CRF])

) Pumps have an additional term for replacement seals:

(Pump Count)x(Initial Leak Frequency)x(Fraction Requiring

Repair)x(Replacement Seal Cost)x(Capital Recovery Fac:tor [CRF])

ContrQlled Unitl

Compressor Vent Systems:

Pressure Relief Devices:

• Disks

• Holden, Valves, etc.

Sample Connections:

(CCOMP)x(S6.242.46)x(0.163)

(C,.v)x(S77.74)x(0.58)

(CPIly)x(J.8S2.0 1»)«0.163)

(C,dx(S408.61)x(O.163)

:Dwl

Annualized Capital Cost = [(CCOMP)x(6.242.46)x(O.16J) + (Cray)x(S77.14)x(O.58)

+ (CP1lv)x(3.852.01)x(O.163) + (Csclx(408.61)x(O.163)]

A·)
ASSCALIZED OPEBATISG COST

The annual operating costs are the same for uncontrolled and controlled units. The

annual operating cost has been broken down into three parts. Maintenance Charges.

Miscellaneous Charges. and Labor Charges, as follows:

Annual Maintenance CbariC

The maintenance charge is 5% of the capital cost for compressors, pressure relief devices.

open-ended lines, and sample connections. For monitoring instruments the maintenance

charge is $4280.004

• The annual charge for pump seals is based on the number of pwnps

repaired each year.

Monitoring Instrument:

Compressors:

Pressure Relief Devices:

• Disks

- Holders, Valves, etc.

Open-Ended Lines:

Sample Connections:

Pump Seals:

$4,280.00

(CcoMP)x($6,242.46)x(O.05)

(CPav) x(S77.74»)(0.05)

(CPav)x(S3,852.01)x(O.OS)

(Coa,)x(S101.66)x(0.05)

(CscJx(S408.61)x(0.05)

(Cp)x(12)x(O.10)x(O.75)x($ 180.00)

4 Memorandum from D.]. Whitt, Radian to David Markwordt, U.S. EPA, "Final Cost

Impacts Analysis for HON Equipment Leaks", April 15, 1991, p.16.

Annual Mlsc;cUlnCQuJ Chiria

The miscellaneous charges are calculated as 4% of the capital cost for monitoring

;

~,

.."truments compresson pressure relief devices, open-ended lines and sample l' , . ..•,. barge lor

connections. The charge for pump seals 15 800/0 of the annUAl mamtenance c

pump seals.

A-4

1P
Compressors:

Pressure Relief Devices

- Disks

- Holders, valves, etc.

Open·Ended Lines

Sample Connections:

Pwnp Seals:

Annual Labor CharlC3

(S6,500 00) x(O 04)

«('CMP»)( (56242. 46) x (0.04)

(CPRV) x($77. 74)x(0.04)

(CPRv)x(S3,852.0 1) x(0.04)

(CoEl.)x($10 1.66)x(0.04)

(Csdx (S408.61)x(0.04)

(Cp)x( 12) x(0.1O)x(O. 75»«$180.00) x(O. 80)

The annual labor charges can be further divided into two portions, LDAR monitoring and

LDAR repaint as follows:

Monitoring:'

Gas Valves

Light Liquid Valves

Pumps'

(CVO) x (12)x(S2.00)x( 1.4)

(CvJx( 12)x(S2.00)x( 1.4)

(C,)x( 12)x($2.00)x(1.4) +

(C,)x(52)x(0.5/60)x($22.50)x( 1.4)

Connecton (CCON) x(1) x($2.00) x(1.4)

PressW'e Relief Devices (Cn.v)x( 1)x($2.00)x(1.4)

Repair: 7

Gas Valves (Cva)x(O.02)x(l2)x(0.25)x(4)x(S22.50)x(1.4)

Light Liquid Valves (CyJx(O.02)x( 12)x(0.75)x(4)x($22.50)x( 1.4)

, LDAR Monitoriq Costs: (Component Count) x (Monitoringslyr) x (Monitoring

Fee)x(400t'o Increase for Admin;sttative Suppon)

6 Pump Monitoring hu an additional tenD for weekly visual monitoring: (Pump

Count)x(S2 WeeksIYr)x(O.S MinlPump)/(60 MinIHr)xOabor Cost [SIhr])x(40% Increase

for administrative support)

, LDAR Repair cost (Component COUDt) x(Leak Frequency) x(Monitoringslyr) x(Fraction

Requiring Repair) x(HoursIR.epair) x(Labor Cost [S/hr]) x(40% Increase for Administrative

Suppon)

A-5