## Development of Chemical Precipitation Purchased Equipment Costs: **Chemical Feed Sy stems** 

Purchased Equipment Costs are the sum of the following cost elements: (1) Pump Costs (2) Tank Costs (3) Chemical Feed Sy stem Costs (4) Mixer Costs (5) Clarifier Costs (6) Filter Press Costs (7) Sand Filter Costs

This Excel workbook consists of the following worksheets:

Sum ma ry

Calculations

Silo Volum e
**Legend**

Blue cells contain automatically calculated values. Presents the relationship between total feed sy stem cost and silo size. Since the maximum storage requirement required 4 large silos and costs were provided on a per silo basis, EPA interpolated costs for the storage requirement associated with 1, 2, and 3 large silos shown in rows 4-6. Each cost component includes the cost of freight and associated ancillary equipm ent such as piping, valves, and controllers.
This Excel workbook supports EPA's derivation of cost element (3) using information provided in response to the Steam Electric Survey

and vendor data.

The following worksheets support EPA's determination of lime feed sy stem costs. Expected flow rates and dosage rates were used to calculate the range of silo sizes needed to store the required amount of lime. The vendor then provided cost estimates for the minimum and maximum expected storage requirements including the quantity of silos.

Presents a summary

of the maximum values calculated in the Calculations tab. Calculates the minimum and maximum expected storage requirements for lime based on flow rate and dosage.

CBI DATA: Yellow cells contain dosage data calculated based on CBI survey responses.Presents the relationship between total feed sy stem cost and silo size. Since the maximum storage requirement required 4 large silos and costs were provided on a per silo basis, EPA interpolated costs for the storage requirement associated with 1, 2, and 3 large silos shown Each cost component includes the cost of freight and associated ancillary equipm ent such as piping, valves, and

This Excel workbook supports EPA's derivation of cost element (3) using information provided in response to the Steam

The following worksheets support EPA's determination of lime feed sy stem costs. Expected flow rates and dosage rates were used to calculate the range of silo sizes needed to store the required amount of lime. The vendor then provided cost

Calculates the minimum and maximum expected storage requirements for lime based on

CBI DATA: Yellow cells contain dosage data calculated based on CBI survey responses.Summary sheet (calculations on next tab)

Max Lime Dosage, g/min [Redacted] 10% Lime Slurry add'n rate, gal/min [Redacted] Lime Storage*, cu ft [Redacted]
*Assumes 15 day storageMin Max Densities kg/L

Flow rate, gpm 30 1500 Lime 0.5 Lime Dosage, g/L [Redacted] [Redacted] Water 1 10% lime slurry 0.95 30 gpm Min Max Lime dosage rate, g/min [Redacted] [Redacted] Lime flow rate, gal/min [Redacted] [Redacted] Water dosage rate, g/min [Redacted] [Redacted] Water flow rate, gal/min [Redacted] [Redacted] Lime slurry flow rate, gal/min [Redacted] [Redacted]
1500 gpm Min Max Lime dosage rate, g/min [Redacted] [Redacted] Lime flow rate, gal/min [Redacted] [Redacted] Water dosage rate, g/min [Redacted] [Redacted] Water flow rate, gal/min [Redacted] [Redacted] Lime slurry flow rate, gal/min [Redacted] [Redacted]

Lime supply 15 day 30 day 15 day 30 day 30 gpm, kg [Redacted] [Redacted] [Redacted] [Redacted] 30 gpm, gal [Redacted] [Redacted] [Redacted] [Redacted] 30 gpm, cu ft [Redacted] [Redacted] [Redacted] [Redacted] 1500 gpm, kg [Redacted] [Redacted] [Redacted] [Redacted] 1500 gpm, gal [Redacted] [Redacted] [Redacted] [Redacted] 1500 gpm, cu ft [Redacted] [Redacted] [Redacted] [Redacted] Min Dose Max DoseConversion factors Lime slurry concentrations (by weight)

g/kg 1000 Lime 10% L/gal 3.78 Water 90% min/day 1440 gal/cu ft 7.48**Storage volume, cu ft Silo qty**  **Per Feed system cost, $ Total Feed Systems Cost, $**  600 1 230,000

$ 230,000 $ 37250 4 330,000

$ 1,320,000 $ 9312.5 1 330,000

$ 330,000 $ 18625 2 330,000

$ 660,000 $ 27937.5 3 330,000

$ 990,000 $

y = 0.0004x 2 + 17.487x + 193013

R2 = 0.9934

$- $200,000 $400,000 $600,000 $800,000 $1,000,000 $1,200,000 $1,400,000 $1,600,000

0 5000 10000 15000 20000 25000 30000 35000 40000**T o** **t a** **l F** **e e** **d S** **y s** **t e** **m s** **C o** **s t** **, $** 

**Storage Volume, cu ft** 

# To **tal Feed Systems Cost vs. Stor ag**  **e V olume**