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DRAFT
CONSTRUCTION GRANTS PROGRAM
INFORMATION
METHODOLOGY AND ASSUMPTIONS
USED TO DETERMINE
ACCEPTABLE STAGING PERIODS
FOR TREATMENT PLANT CAPACITY
NOVEMBER 1976
UNITED STATES
ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF WATER PROGRAM OPERATIONS
MUNICIPAL CONSTRUCTION DIVISION
WASHINGTON, D.C. 20460
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METHODOLOGY AND ASSUMPTIONS USED
TO DETERMINE ACCEPTABLE STAGING PERIODS
FOR TREATMENT PLANT CAPACITY
MUNICIPAL CONSTRUCTION DIVISION
OFF CE OF WATER PROGRAM OPERATIONS
EN 'IRONMENTAL PROTECTICN AGENCY
DECEMBER 1976
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REVIEW NOTICE
This document is a Draft Report - not an officii 1 EPA publication.
This report presents the methodology and assumptions used to de-
termine optimum staging periods for treatment plant capacity, and
supplements the proposed amendmen: to the Cost-Effectiveness
Analysis Guidelines (40 CFR, Part 35, Subpart E - Appendix A).
i
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TABLE OF CONTENTS
Forward
Abstract
Figures
Tablt s
Purpose 1
Basis of Analysis 1
Assumptions 1
Appl icabi 1 ity 2
Staging Analysis 2
General Description 2
Cost Equations .3
Calculation Procedures 5
jThe Sequence of Calculation 5
Example of Plant Staging and Sizing Calculation 7
Computer Program 9
Sensitivity Analysis 9
Conclusions 9
iii
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FIGURES
Number Page
1. Cost Versus Discharge Relation 11
TABLES
Number Page
1. Sensitivity Analysis 12
2. Study Results of the Design (Staging) Period of
the Constructior 13
3. Computer Program cor Staging and Sizing of Wastewater
Treatment Plants 14
i v
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PURPOSE
This bulletin serves as a technical supplement to the amendrent to the
EPA Cost-Effectiveness Guidelines. It covers the procedure' and
assumptions used in determining the Construction staging periods for
treatment plants presented in the guidelines. Also presented herein is
a computer stiip-by-step hand calculation procedure for determing on a
case-by-case 'jasis the cost-effective staging period for treatment plants.
BASIS OF ANALYSIS
Assumptions
The assumptions used in the determination of total present worth
costs of alternative staging periods are:
1. New activated sludge secondary treatment plants are to be
considered.
2. The planning period is twenty (20) years.
3. The salvage value is based on straight-line depreciation of
the initial cost over an assumed twenty (20) year useful
life of the plant or plant expansions.
4. All unit processes can be staged.
5. All land required for the twenty (20) year planning >er1od
would be provided at the time of initial constructor i
because land need for future expansion might not oth irwise
be available.
6. The investment- in the first staging period includes the cost
of capacity for n111 a 1 flow when the plant becomes )perational
plus the first stage increment of capacity.
7. The interest rate for analysis is 6.125% (The FY-1977 rate is
6.37%).
8. Sewage treat ient plant costs are bared on an index of 263,
9. The wholesali price index is 176.1.
10. The average fcage rate is six (6) dollars per hour.
11. The unit price of the land is $50,000 per acre.
1
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Applicabi1i ty
The staging an. lysis for secondary treatment plants can be directly
applied to advanced \astewater 1roatment plants because the economy of
scale factor for secondary treatment plants is about the same as that
for AWT plants. The anlysis ani' its results also apply to land treat-
ment systems, except for the land component which would be a(quirrd for
a twenty (20) year period,
STAGING ANALYSIS
General Description
The staging analysis involves estimating capital investment costs,
fixed operation and maintenance costs and variable operation and mainte-
nance costs.
The capital investment includes the initial costs of purchasing
wastewater treatment equipment and of the construction of wa;tewator
treatment buildings and treatment and transmitting structure?, pipes,
and other appurtenances. The capital investment for land is :on-
sic!ered separately in the anlysis because al1 land required < /er the
twenty (20) year planning oeriod is assumed to be provided a' the
beginning of the period. This is to assure the availability of land
when needed for future plait expansion.
The fixed operation and maintenance costs are component of
operation and maintenance costs and depend upon the design c. pacity
of the plant. These fixed O&M costs include the wages for s
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Cost Equations
The cost equations for ca| ital investment were derived from data
covering over two hundred (200) bids for plant constructs contracts
that were awardf?d within the past several years. The basi>. cost
equation for actual constructor of secondary wastewater treatment
plants using the activated sludge process can be represented by the
equation:
0.814
PC = 2.15Q (1)
where
PC = cafital cost in million dollars.
Q = plant effluent in million gallons per day. (MGD)
The above eqiation was developed in January 1976 when the cost
index for sewage treatment plants (CSTP) was 255.4. For any other
month, the above equation can be modified to:
PC = 2.15 CSTP Q (2)
255.4
where CSTP is the co:t index of sewage treatment plants al a given time.
In addition to ictual construction costs, the capitil investment
includes legal, admin strative, financial anr engineering fees and
contingencies. Since these costs constitute approximately 21% of the
actual construction costs, Eq. (2) can be modified as follows:
0.814 0.814 (3)
PC = 1.25x2.15CSTP Q = 0.010'CSTP Q
255.4
The operation and maintenance cost for the secondary treatment
plants were developed from operation and maintenance data covering over
four hundred (400) plants.
These costs include:
a. wages
b. staff training costs
c. plant maintenance costs
d. electricity and fuel costs
e. chemicals and
f. others
3
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The first three (3) terms are considered fixed O&M costs and can
be represented by the formula:
0.755 0.3535 0.677 (4)
PFOM = PHR (20884Q + 447.2Q + 3757Q )
6
4.2x10
where
PFOM = Fixed O&M costs in million dollars.
PHR = the wage rate in dollars per hour.
Q = Plant Average Annual Design flow rat in MGD.
The above equation was developed when the wage rate av raged $4.20
per hour. The first, second and the third items of this equ tion are
wages, cost of staff training and regular maintenance expenses.
The costs of electricity, chericals and others are classified as
variable operation and maintenance costs, and can be represented by the
following equation:
0.684 0.781 0.778 '5)
PV0M = WPI (6441.2Q + 2627.9Q + 3300Q )
6
120x10
where
PV0M = variable 0&M costs in million dollars.
Q = plant influent flow rate in mgd.
WPI 3 wholesale price index for industrial commoditie;.
The above equation was developed based on the wholesale price index
of 120.
The total land cost was estimated based on the formula as indicated
in the following:
0.8
LC0ST = ULC (0.76Q + 0.214Q + 08 ) '6)
6
10
LCOST = the land cost in million dollars.
ULC = unit land cost in dollars per acre.
Q = plant average annual design flow rate in mgd.
Figure 1 represents the cost curves for Eqs. (3), (4), (5) atd (6 .
4
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These cost curves are based on the following assigned numbers.
Cost Inde< for Sewage Treatment Plant CSTP = 26.;
Manpower ^.ost PHR = S6.00 per hour-
Wholesale Price Index WPI = 176.1
Unit Land Cost ULC = $50,000 per acre
CALCULATION PROCEDURES
The Sequence of lalcult tions
1. Assign interest rate, unit manpower cost in dollars per hour,
the wastewater flow rate at the beginning of the planning
in mgd, the wastewater flow at the end of the planning period
in mgd, the cost index for sewage treatment plant construction
wholesale price index of materials, and unit land cost in
dollars per acre.
2. Assign a staging period so that the Planning period divided by
the staging period is an integer.
3. Using the wastewater flow projection curve fnr the planning
period, find the first stage design 'ischarge. This dis-
charge is the sum of the wastewater How at the beginning
of planning period and the flow increment at the end of the
first staging period.
4. Find the land investment by using the flow at the end of
planning period and Equation (6). A cost curve representing
Equation (6) and a unit land cost of $50,000 per acre is
shown in Figure 1.
5. The capital investment can be found from Equation (3) and
the flows derived in Item 3. The cost curve in iFigur* 1
represents Equation (3) for a CSTP value of 263.
6. The present value of a future capital investmen: can be estl-
matec by multiplying the capital investment by the single
payme it present worth factor (swpf)* for the1tine span. The
sum of" these present values over the planning pjriod plus
the initial investment give the total present wirth of
capital investments.
7. A salvage value for the capital investment can be estimated
by linearly decreasing the value toward the end of tfe
expected useful facility life. The salvage val je of land
at the end of the planning period i-> assumed tc equal the
iniital land investment.
The single value present worth of the salvage value can be
obtained by multiplying the salvage value of spwf.
*spwf = 1 Where "n" is the length of the time span in years.;
n i
(1+1)
5
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n. Tho Hxed operation nnd rraintrnnncr co^ts for
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Example of Plant Stag'ng and Sizing uilculati> in
1. Assumptior
Planning p riod - twenty (20) years.
Discharge
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Calcul te Total Present Worth for Staging Poricd of
Ten (111) Years
a. Present Worth Capital Cost:
0.814P* -i £
0.0107x 63x(6.25) [l + spwf '10, 6 1/8*H = 14.17x10
b. Land Cos^:
[— 0.8
0.0510.76(7.5) + 0.214(7.5) + 0.8
0.8
I
c. Present Worth Fixed O&M Cost:
6
= o.3:xio
( r- 0.955 0.3535
6 J pwf(10, 6 1/8%)[20884(6.25) + 447.2(6.25)
4.2x10
0.6671 r 0.755
+ 375(6.25) -J+pwf (10, 6 l/8%)spwf(10, 6 1/8*0 [20884(7.5)
0.3535 0.677 V 6
+ 449.2(7.5) + 3757(7.5) -J J = 1.66x10
d. Present Worth Variable 0&M Cost:
20 r 0-684 0.781
V 176.1 6441.2(5.0 + 2.5 n) + 2627.9(1.0 + 2.5 n)
^ 6 "TO 20
n=l 120x10
0.778] 6
+ 3300(5.0 + 2J-_n) J 1 0.77x10
20 n
(1.06125)
e. Salvage Value:
0.814
-0 0107 x 263 >: (1.25) 10 spwf (20, 6 1/8%)
6 6
-0.31 x 10 x spwf (20, 6 1/8%) = -0.60 x 10
6
Total Present Worth 16.51 x 10 dollars
8
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Computer Program
A copy of the computer program for tho above calculation
is attached. The prcgram includes the input and firmats so that
the program is self-< xplanatory.
SENSITIVITY ANALYSIS
The parameters affecting the determination o. optimum
staging periods are listed below In the order of their im-
portance :
1. Economy of scale factor (the exponent in cpaital
cost equation).
2. Ratio of wastewater flow at the end of planning
period to flow at the beginning of plannii g period.
3. Wastewater flow growth pattern (linear, deferred,
accelerated).
4. Interest rate for cos -effectiveness analysis.
5. Fixed operation and miintenaice (1. bor and material)
costs.
6. Plant construction co.t.
7. land Cost.
8. Variable operation an 1 maintenance ;ost.
The last five (5) items were found to lave negligible
effect on the optimum staging period. Table 1 summarizes
the impact of each of the items on the optimum staging
period for a plant having an initial flow of 5 MGD.
CONCLUSIONS
As a resilt of the sensitivity analysis, thf optimum staging
period corresponding to minimum present worth cost and an upper
limit staging period reflecting a two (2) percent allowance above
the minimum total present worth cost were determined for combi-
nations of flow growth, flow growth patterns and initial flow.
Table 2 sumamries the staging period ranges. Although the economy
of scale factor and the interest rate are sensitive parameters,
variations of these parameters are not included in the table be-
cause the former is based on the best c>st data available to the
Agency and the latter is established by Federal regulation.
9
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Table 2 shows the optimum (the smaller number in each range)
staging period to vary from 5 to 10 years. The period tends to be
shorter for low growth factors and deferred growth patterns. The
maximum allowable staging periods vary from 7 to 20 years. The
relatively large staging period ranges reflect the flatness of the
curve of total present worth costs versus staging periods.
The maximum allowable staging periods, presented in 5 year
multiples in the guidance reflect the results of Table 2. The
guidance allowances are based on recognition that the analytical
results will not precisely match specific case conditions and
that the cost difference between an 8 year staging period and a
10 year staging period, for example, would be negligible. The
guidance calls for a minimum staging period of 10 years because
planning, design and actual construction of treatment works may
require 5 to 10 years.
10
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CAPITAL INVESTMENT
FOR SECONDARY TREAT-
MENT
LAND COST FOP
SECONDARY TREATMENT
FIXED O&M FOR
SECONDARY TREATMENT
VARIABLE O&M FOH
SECONDARY TREATMENT
1000
Q. MGD
FIGURE 1 COST VERSUS DISCHARGE RELATION
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TABLE 1 - SENSITIVITY ANALYSIS
Q INITIAL » 5 mgd PLANNING PERIOD ¦ 20 YRS
LAND VALUE - $50,000/ACRE LIFE OF FACILITY = 20 YRS
VARIABLE
RATIO
OF
COEFFICIENT
DISCHARGE AT THE END OF PLANNING PERIOD
ITEMS
7.5 mgd
10 mgd
12.5 mgd
15 mgd
17.5 mgd
CAPITAL
0.8
5-13.32
5-10.49
5- 8.92
5- 7.98
5- 7.50
COSTS
1.0
5-13.51
5-10.61
5- 9.09
5- 8.09
5- 7.57
1.2
5-13.66
5-10.69
5- 9.22
5- 8.16
5- 7.63
FIXED
0.8
5-13.73
5-10.73
5- 9.30
5- 8.26
5- 7.67
O&M
1.0
5-13.51
5-10.69
5- 9.09
5- 8.07
5- 7.57
COSTS
1.2
5-13.30
5-10.49
5- 8.91
5- 7.97
5- 7.49
VARIABLE
0.8
5-13.48
5-10.59
5- 9.05
5- 8.06
5- 7.55
O&M
1.0
5-13.51
5-10.61
5- 9.09
5- 8.07
5- 7.57
COSTS
1.2
5-13.55
5-10.63
5- 9.12
5- 8.11
5- 7.59
LAND
0.5
5-13.49
5-10.60
5- 9.06
5- 8.06
5- 7.55
VALUE
1.0
5-13.51
5-10.61
5- 9.09
5- 8.09
5- 7.57
RATIO
2.0
5-13.57
5-10.64
5- 9.15
5- 8.13
5- 7.61
DISCOUNT'
0.04
10-15.23
5-11.54
5-10.29
5- 9.17
5- 8.39
RATES
0.06125
5-13.51
5-10.61
5-9.08
5-L 8.09
5- 7.57
0.08
5-12.26
5- 9.87
5- 8.13
5- 7.43
4-' 7.02
ECONOMY OF
0.6
20-20
10-20
10-18.66
10-15.66
10-14.46
SCALE
0.814
5-13.51
5-10.61
5- 9.09
5- 8.09
5- 7.57
0.9
2.5- 8.19
2.5- 6.14
2.5- 5.46
2.5- 5.12
2.5- 4.87
GROWTH
ACCELERATED
(0.6) (2)
10-17.20
5-13.34
5-11.72
5-10.91
5-10.42
LINEAR (1)
5-13.51
5-10.61
5- 9.09
5- 8.09
5- 7.57
PATTERN
(1.0)
DEFERRED (3)
5-11.44
5- 8.89
4- 7.53
4- 6.86
4- 6.47
(1.5)
(1) 50% OF GROWTH AT MID-PLANNING PERIOD
(2) 66% GROWTH AT MID-PLANNING PERIOD
(3> 35.4% OF GROWTH © 1/2 PLANNING PERIOD
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TABLE 2- STUDY RESULTS OF THE DESIGN (STAGING) PERIOD
OF THE CONSTRUCTION OF WASTEWATER TREATMENT PLANTS
FLOW
GROWTH FACTOR
FLOW
GROWTH PATTERN
INITIAL FLOW IN MGD
1.5
4.5
.3.5
40.5
121.5
1.2
LINEAR
10.0-20.0
10.0-20.0
10.0-20.0
in 1—20.0
10.0-20.0
ACCELERATED
10.0-20.0
10.0-20.0
10.0-20.0
10.0-20.0
10.0-20.0
1.5
DEFERRED
5.0-11.4
5.0-11.5
5.0-11.5
5.0-11.5
5.0-11.6
LINEAR
5.0-13.5
5.0-13.5
5.0-17.6
*>.0—13.7
5.0-13.7
ACCELERATED
10.0-15.2
10.0-15.2
10.0-15.3
10.0-15.3
10.0-15.3
2.0
DEFERRED
5.0- 8.7
O)
00
1
o
LT>
5.0- 8.7
5.0- 9.0
5.0- 9.0
LINEAR
5.0-10.6
5.0—'i 0.6
5.0-10.7
5.0-10.7
5.0-10.7
ACCELERATED
5.0-11.5
5.0-11.6
5.0-11.6
5.0-11.7
5.0-11.7
3.0
DEFERRED
4.0- 6.8
4.0- 6.9
4.0- 6.9
4.0- b.9
4.0- 6.9
LINEAR
5-.0— 8.1
5.0- 8.1
5.0- 8.1
5.0- 8.2
5.0- 8.2
ACCELERATED
5.0- 9.3
5.0- 9.3
5.0- 9.4
5.0- 9.5
5.0- 9.5
1. PLANNING PERIOD = 20 YRS
2. INTEREST RATE IS 6.125%
3. 35% OF GROWTH ASSUMED TO OCCUR DURING FIRST HALF OF PLANNING PERIOD.
4. 57% OF GROWTH ASSUMED TO OCCUR DURING FIRST HALF OF PLANNING PERIOD.
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/VJYSZZ999 JOB (NeEO»R13»01t04»0*l»»HUANG»
// EXEC FOHTHCLG»REGION»200K
//FORT.SYSIN DO •
C PROGRAM TO CALCULATE MONETARY COST OF ALTERNATIVE WASTEWATER
C TREATMENT PLANTS STAGING PERIODS
C WEN H HUANG AND PHILIP H. GRAHAM
C POPP=POPULATION AT END OF PLANNING PERIOD
C POPI*POPULATION AT ATART OF PLANNING PERIOO
C RI=OISCOUNT RATE
C TCaTIME SINCE START OF PLANNING PERIOD
C TI=STAGING PERIOD IN YEARS
C NSNUMBER OF STAGES DURING PLANNING PERIOD (CALCULATED VALUE)
C TT*LIFE OF FACILITY IN YEARS
C NTPTS=NUM8ER OF STAGING INTERVALS
C NCURV=NUMBER OF CURVES PER GRAPH (FCOST VS TI)
C GPCD=WASTwATER GENERATION IN GALLONS/CAP ITA/OAY(AVERAGE DAY)
C **SIZE OF EACri INCREMENT STAGE IN AVE DAY DESIGN CAPACITY
^ iiGO)
C . Y=CUNULATIVE SIZE OF STAGES IN AVE DAY OESIGN CAPACITYCMGO)
C Z3USED CAPACITY IN ANY YEAR FROM THE START OF
C PLANNING PERIOD(IN AVE DAY MGO USED)
C CAP=CAPITAL COST IN MILLIONS OF DOLLARS
C NCASE=TOTAL NUMBER OF POINT TO SE PLOTTEO IN EACH CURVE.
C OISIsINITIAL DISCHARGE AT THE START OF PLANNING PERIOD
C OISE=DISChARGE AT THE ENO OF PLANNING PERIOD
C CCOST=INITIAL CAR IT AL COST
C SCOST=5URPLUS COST
C FCOST=FIRST COST
OMCVTsTOTAL 0 AMC M '.A. C.."
C OMCFT=TOTAL 0 (. M FIXED COST
C XCOST=L AND COST
C ULC=UNIT LAND COST IN DOLLARS PAR ACRE
C WPI =s WHOLE SALE PRICE INOEX OF INDUSTRIAL COMMOOITY
C STP=SEWAGE TREATMENT PLANT CONSTRUCTION COST INDEX
0 IT=ITM CURVE IN CALCULATION
C NN=THE OPTION TO BE USED
C FOR NN=1 USE TA8LE
C FOR NN=2 USE EQUATIONS
C CN=POPULATION GROWTH PATTERN SHOWN IN EQUATION
c M=NUH9ER OF POINT IN POPLUATION GROxTrt PATTroN
C I=ANY POINT IN POPULATION GROWTH PATTERN
C TCI) OR T=TIM£ OF WHICH POPULATION IS ESTIMaTEO
C 0(1) OR D=POPULATION AT TIME T(l)
C PHRswAGE RATE IN DOLLAR PER HOUR
C II=ANY INTEGER STAGING INTERVALS
"MCST=TOTAL OPERATION 4fs_ iNCE
C COST AT THE BEGINNING OF THE PERIOD
C SMGDI=ANOTHEK FORM OF DISCHARGE AT THE BEGINNING
C OF PLANNING PERIOD
C ODIS=DISCHARGE AT INTERMEOIA Ic ING PERIOD
C SURP=SURPLUS VALUE OF INITIAL INVESTMENT
C AT THE £NO OF PLANNING PERIOD
C GRFP=UNIFORM SERIES — PRESENT bORTh FACTOR
C GSFP=SINGLE PA?M£nT — PRESENT rfOPTh FACTOR
C LE=LESS Than OR EQUAL TO
C OMCF«FIXED 0 AND M COST
C OMCV—VARIABLE 0 S, M COST
C ZI=HIGHEST OISCHARGE IN POPULATION CURVE
c aT That planning PERIOD
C TCOST=TOTAL COST
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64.
65.
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71,
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7b,
77,
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90 ,
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95.
DIMENSION Q(50.5)
DIMENSION 01(50)
DIMENSION TllOO).0(100)
19 FORMAT (2F10.4)
29 FORMATU10)
39 FORMAT(5F10.2)
72 FORMAT(2X'U.PR.FA.•«ZXt'S.PR.FA.»»2X« »IN.DIS* »4Xt'AC.DIS' t
.3X, 'FI.OM' .4X.•AC.F.OM*.3*.'SUft.CT',4X.'CA.CT')
73 FORMAT tIX » * SURP.COSTFIRST COST*I
74 FORMAT (2X'CA.CST«»*X,'SUR.CST'.2X»•1ST CST'.3X.«LAN0 CT».
.2X»'FI.OM'.3X.'VA.OM'»3X»'TTL 0M'.4X.'TTL COST')
r NOTE: PROGRAM IS FOR PLANNING PERIOD EQ.TO FACILITY LIFE
C NOTE: TT/TI MUST BE INTEGER NUMBER
12 FORMAT fIX. 10X»'EXPECTED COST OP w«ctf„aTER ' .IX.
• •TREATMENT FACILITY FOR ALTERNAiiVE STAGING'.IX.
.'INTERVALS')
10 FORMAT C4X.'TTI',6X.«T.0IS»)
4 0 cr»RMAT 14F 10.2)
50 FORMAT (FIG.-..
60 FORMAT (F10.Q»I10»4F10.0)
8000 FORMAT (5X.'NCASE'»6X.'NTPTS'.5X.'NCURV')
9010 FORMAT 13X .'F AC.LIF•»4X.•STG.PO.* »<>X.'STP'.6X1•HPI*,4X,•UN.LD.CT>)
5 FORMAT (315)
13 FORMAT (IX.3110)
15 FORMAT { 6X « ¦POP Z ' .6X «•POPP' . 4X .'INT.RATE'•
,4X » *i/PHR•» 7X
.» »OISI •.7X. «OISE».6*.•ZC^O1,
20 FORMAT (2F10.2«2X»F,10.6»2F10.4»2F10.4)
70 FORMAT (1X.8F10.6)
FORMAT (2F10.6)
30 FORMAT (3F10.6)
WRITE (6.12)
READ(5.5) NCASE.NTPTS.NCORV
WRITE (6.8000)
WRITE (6.1"" NCASE.NTPTS.NCUHV
K=1
KK = 0
OO 1100 IT=l.MCtlRV
READ (5.29) NN
IF (NN.EQ.l) GO TO 1
IF (NN.EQ.2) GO TO 21
21 READ (5.50) CN
WHITE (6.50) CN
GO TO 2
1 READ (5.29) "
DO 1000 1=1.M
or.- -c . T f r | ( 0(1)
1000 CONTINUE
C CALCULATION OF CAPITAL INVESTMENTS AT DIFFERENT STAGES
2 READ (5.40) TT,STP.*PI.ULC
READ (5.40) DISI,nTSE.PUPI.POPP
READ (5.30) RI.PNRtGCPD
WHITE (6.15)
WHITE (6.20) POPI.POPP.RI.PHR.DISI.DISE.GCPD
DO 200 11 = 1 . NTPTS
KK=KK* I
READ (5. 50) 71
WHITE (6.9010)
WHITE (6.39) TT.TI.STP.WPI.ULC
TC=0.
CCOST=0.
-------
9b. SCOST=0.
97. OMCST=0.
98. OMCFT=0.
99. OMCVT*0.
100. SMGDIzOISI
101. N=TT/TI
102. C SET VALUES OF INDICES OF STP t. wPI ALSO LANO S/ACRE & PERSON S/HR
103. WRITE (6.1C;
104. WRITE <6.72)
ICS. TC = TC ~ TI
106. IF" (NN.EQ.l) GO TO *50
107. IF (NN.EJ.2) GO TO *51
lGd. CAUL INTERP (T.D.TC.ODIS.M)
109. GO TO 452
110. 451 CALL FORMUL iil»uUIS.TT,DIS 1,DISE.CN)
111. 452 X=DDIS-SHGDI
112. CAP = (2.15 • DDIS •• 0.814) • STP/255.*
113. CAP = CAP • 1.27
11*. Si'RP = ( TC-TI > /TT'CAP
115. CCOST = CCOST • CAP
116. SCOST = SCOST ~ SURP
117. GRFP = ((1. ~ R1) •• TI - 1.) / (RI • (1. ~ RI1 •• TI)
113. GSFP = 1.0
119. V = DO IS
120. OMCF = (20884. • Y •• 0.755 ~ 447.2 • Y»» 0.3535
121. X ~ 3757. • Y •• 0.677) • PrlR • GRFP • GSFP / 4200000
122. OMCFT=u«CFT"
123. WRITE (6.70) GRFP.GSFP.X.Y.OMCF.OMCFT,SCOST.CCOST
124. SMGDI=DDIS
IF (N.LE.1.)GO TO 100
126. DO 100 I=2»N
127. TC«TC«TI
128. IF (NN.EO.l) GO TO 3
129. IF (NN.EQ.2) GO TO 4
130. 3 CALL INTERP
1*7. .•PHR#GRFP*GSFP/(1000000.*4.2)
140. OMCFT=OMCFT»OMCF
149. WRITE (fct 70) GRFP,GSFP.X»Y,OMCF.OMCFT.SCOST.CCOST
150. SMGDI=ODIS
151. 100 CONTINUE
152. C COMPLETES ESTIMATIONS OF TOTAL COSTS FOP EACH STAGING INTERVAL
153. SCOST=SCOST/(1.*RI)••TT
154. FCOST^CCOST-SCOST
155. WRITE (6.73)
156. WRITE (6.71) SCOST,FCOST
-------
1ST.
JT*T7
158.
«R1TE 16110 )
159.
00 300 J=1. JT
160.
NB=J
161.
IFtNN.ta.15 GO TO 6
162.
IF GO TO T
163.
6
Bn=nB
164 .
CALL INTERP (T.D.BN.Zl.M)
165.
NB=8N
166 .
GO TO d
167.
7
0N=NB
168.
CALL FORMUL :<8N.Z1,TT,0ISI,DISE.CN)
169.
NH = bN
170.
•(1./<1.~RI)«»N8)/100 0000.
173.
OMCVT=OmTVT * OMCV
174.
3'.'"
"- . 1iNUE
17b .
XCOST*ULC* <0.76*L)ISE**0.80*0.£i» *DISE» J. <3 J
176.
XC05T=XCOST/1000000.
176.1
SURL=XCOST/(1.*RI)••TT
177.
OMCST*OMCFT »0MCVT
178.
tcost=fcost.omcst*xcost-surl
179.
*HITE <6.74)
130 .
WRITE <6. 7o) CCOST.SCOST.FCOST.XCQST.O"CFT,OMCVT,OMCST.TCOST
181.
Q1,<0,JJ=1.NCURV),L = 1.NTPTS)
197.
IF (K.6T.NCUHV) WRITE<7.103)(Q1(L1»(0(L»JJ>.JJ=1.NCURV).L=1.NTPTS)
138.
IF (K.GT.NCUfcV) K=1
189.
103
FORMAT (F10.2 » 5F12.3)
1-90.
1 l no
CONTINUE
191 .
CALL SuMOUT
192.
999
STOP
193.
end
194.
subroutine SUHOUT
195.
DIMENSION TARY(8)
196.
DIMENSION CARYl(6)
1 £ 7 .
OIUfcNbiuN CARY2(8)
196.
DIMENSION CABY3IB)
i •
DIMENSION CARY418)
Z3 0.
DIMENSION CAR Y5(8)
201.
RE* i ..D 7
aooo
FORMAT (F10.2.SF12.3)
c. ^ — .
9000
FORMAT (3Flu.^:
204.
9010
FORMAT (IX, 3F10.2)
205.
1000
REAO <7.8000,EMD=100>(TARY(N),CAHY1(N),
206.
.CAKY2(N). CARY3(N)» CARY 4 (N) . CARY5(N). N=l.ai
2 u i .
CALL SMALST ICARY1.CTEST.NMIN)
2 oa.
CTEST = 1.02 » CTEST
209.
SPOPT = TARY(NMIN)
210.
call MV1NT ( NMIN, CTEST. CAHYl, TARY. SPMlN. SPMAX 1
211.
¦ RITE < e> , 9000 ) SPMIN, SPOPT, SPMAX
212.
CALL SMALST (CARY?,CTEST,NMIN) "
213.
CTEST = 1.02 • CTEST
214.
SPOPT = TARY(NMIN)
215.
CALL MVINT 1 NMIN, CTEST. CARY2, TARY. SPMIN. SPMAX )
216.
"RITE "»6..900(U-,SPMIN, SPOPT. SPMAX
-------
217.
CAUL SMALST (CART3»CTEST.NMIN1
218.
CT£ST * 1.02 • CTEST
2X9.
SPOPT * TARY(NMIN)
220.
CALL MVINT ( NMIN> CTEST, CARV3, TARY * SPHINt SPHAX
221.
WRITE <6t9000> SPMIN. SPOPT, SPMAX
222.
CALL SMALST (CARY*,CTEST,NMIN>
223.
CTEST a 1.02 • CTEST
22*.
SPOPT * TARY(NMIN)
225.
CALL MVINT (NMIN,CTEST,CARY4,TARY,SPMIN.SPMAX)
226'
WRITE 16.9000) SPMIN,SPOPT,SPMAX
227.
CALL SMALST
2*7.
DIMENSION CARY(8)
2*8.
OIMENSION TARYO)
2*9.
SPMAX = 20.01
25C .
SPMIN = 0.99
251.
00 If) X = ? .8
252.
KK = K - 1
253.
IF (CAHY(K).EQ.CARY(KK)) GO TO 10
25*.
TEST = (CARY(KK) - CTEST )/ (C AH Y(KK) - CARY(K))
255.
IF (TEST.i.T ¦ * .0.OR.TEST.ST. 1 .0) GO TO 10
256 •
IF (KK.LT.NMI*) SPMIN = TAriY ! KK) - TEST ~ ( TARY(KK)
257.
IF (KK.GE.NMIN) SPMiX = TARY(KK) ~ TEST • ( T ARY ( K)
256.
1 0
CONTINUE
259.
RETURN
260.
ENO
261.
SUBROUTINE INTERP (t,Y»XA,YA,M
262.
DIMENSION X(IOO)»Y(100)
263.
DO 200 1 = 1 .'.
26*.
IF )
270.
50 TO 600
271 .
300
YA=Y(I)
272.
GO TO 600
273.
200
CONTINUE
2 7*.
600
WRITE (6,20) X A,Y A
275.
20
FORMAT (2F10.3 >
276.
201
RETURN
277.
ENO
)
TARY )
-------
278.
SUBROUTINE FORMUL
tx.r.xM,
279.
Y*YI~ (YM-YI1 »U/XM) »*CN
280 .
WRITE (6.20) X.Y
281.
20
FORMAT (2F10.3)
282.
RETURN
2b3.
END
284.
//l>O.fT07FQ0l 00 0SN=CNNEE0.JYS
2riS.
//
DI SP= l Ql_D • KICT) •
266.
//
UNIT=3330,
287.
//
VOL==SEW=NEE074,
2«a.
//
SPACE=(TRK,{10.1)«WLSE).
289.
//
DCB=(LPECL=80»HECFM
=F8,8LKS
290.
//OO.SYSIw DO •
291.
40 a 5
292.
2
293.
1.000
294.
20.00 263.
176.1
295.
5.00 7.50
40000.
296.
0.02000 6.
125.
297.
0 «s
298.
1.
299.
2.
300.
2.5
301.
4.
302.
5.
303 .
lu.
304.
20.
305.
2
306.
1.000
7*7.
, « 0 .
176.1
308.
5.00 10.00
40000.
309.
0.02000 6.
125.
310.
0.5
311.
1.
312.
?.
j i i •
C . 3
314.
4.
315.
5.
316.
10.
117.
20.
318.
2
319.
1.000
320.
20.00 263.
176.1
321.
5.00 12.51
40000.
322.
0.02003 6.
• C
323.
0.5
324.
1.
JCJ •
2.
326.
2.5
327.
4.
323.
5.
329.
10.
330.
20.
331.
2
332.
1.000
333.
20.30 263.
176.10
334.
5.00 15.00
40000.
335.
0.02000 &•
125.
336.
0.5
337.
1 .
338.
2.
50000.
60000.
50001.
80000.
50000.
100000.
50000.
120000.
-------
337.
339.
1.
2.
339.
2,5
340.
4.
341.
5.
342.
10.
343.
20.
344.
2
345.
1.000
346.
20.00
347.
5.00
348.
0.02000'
349.
0.5
350.
1.
351.
2.
352.
2.5
353.
».
354.
5.
355.
10.
356.
20.
263. 176.1 50000
17.50 40000. 140000
6. 125.
------- |