Development of Chemical Precipitation Purchased 

Equipment Costs:

Chemical Feed Systems

Purchased Equipment Costs are the sum of the following cost elements:

(1) Pump Costs

(2) Tank Costs

(3) Chemical Feed System Costs

(4) Mixer Costs

(5) Clarifier Costs

(6) Filter Press Costs

(7) Sand Filter Costs

Each cost component includes the cost of freight and associated ancillary equipment such as 

piping, valves, and controllers.

The following email supports EPA’s development of cost element (3) by documenting EPA's 

communication with a vendor regarding purchase costs for chemical feed systems used in the 

Steam Electric cost model.
From: "Troy Litherland" <TLitherland@enpro-tech.com>

To: "Kavya Kasturi" <Kavya.Kasturi@erg.com>

CC: "Jesse Kuntz" <JKuntz@enpro-tech.com>

Date: 7/6/2011 7:21 AM

Subject: RE: Cost request for lime feed systems

Hi Kavya,

I had a great 4th and hope you did as well.

I should have been more clear on the metering pump costing. $15K is a conservative figure that would cover multiple pump types and mfgs. 

Small peristaltic pumps with integral controls up to 100 gph or so capacity are available with a capital cost of appx. $5K. 

Above 100 gph we would need to review the chemical, discharge pressure required, etc to determine the pump type. The controls requirements

would also have to be known. Skid mounted systems with multiple pumps, pre-piped and pre-wired to minimize installation cost by the 

contractor will cost appx. $15K per feed point. 

Hope this helps.

Thanks,

Troy

From: Kavya Kasturi [mailto:Kavya.Kasturi@erg.com] 

Sent: Tuesday, July 05, 2011 3:35 PM

To: Troy Litherland

Cc: Jesse Kuntz

Subject: RE: Cost request for lime feed systems

Hi Troy,

Thanks again for all of your help! I really appreciate it. I hope you had a great 4th of July weekend!

I have one more clarification question regarding our conversation last week. You mentioned that for liquid feed systems, if the addition rate is 

under 100 gph $5,000 would be a reasonable cost estimate and if over 100 gph, $15,000 would be a reasonable cost estimate. Did I understand 

that correctly? Would that mean that if the plant needed to add over 100 gph it might be more cost effective to get 2 smaller systems using 

smaller pumps as opposed to one big system? Also, is there a feed rate that would require multiple feed systems or is the $15,000 estimate 

conservative enough to accomodate very high feed rates?

Thanks again,

Kavya

Kavya P. Kasturi, Environmental Engineer

Eastern Research Group, Inc.

Phone: (240) 654-2524

kavya.kasturi@erg.com

>>> "Troy Litherland" 06/30/11 2:00 PM >>>

If you don’t want to change out the tote more than once per day, 10 gph of chemical, you may want to consider bulk storage. You will need a 

fork truck to move the totes. Some of the tote designs are stackable. It will also depend on the requirements by the state for chemical inventory 

required.

Thanks,

Troy

From: Kavya Kasturi [mailto:Kavya.Kasturi@erg.com] 
Sent: Thursday, June 30, 2011 3:50 PM

To: Troy Litherland

Cc: Jesse Kuntz

Subject: RE: Cost request for lime feed systems

Thanks Troy! I have one last question for now, regarding liquid feed systems. We're trying to determine whether the plants will store the liquid 

chemicals in totes or in tanks. We assume for smaller plants with smaller addition rates it would make sense to use totes while for larger plants 

with larger addition rates, tanks would make most sense. Based on your experience, for liquid feed systems, is there a minimum gallons per day 

addition rate that would trigger a plant storing the chemical in tanks vs. in totes? Any recommendations you have would be great.

Thanks again for your help!

Kavya

Kavya P. Kasturi, Environmental Engineer

Eastern Research Group, Inc.

Phone: (240) 654-2524

kavya.kasturi@erg.com

>>> "Troy Litherland" <TLitherland@enpro-tech.com> 6/30/2011 1:16 PM >>>

Hi Kavya,

The application below will require four (4) 14 feet diameter x 82 feet high silos. Each silo will be approximately $330,000.

You may want to consider utilizing quicklime with slakers mounted in the silos to reduce the chemical volume. Going with quicklime would 

decrease the number of silos to (3) but the equipment price per silo will increase with the addition of a slaker and lime slurry storage tank.

Hope this helps.

Troy Litherland

Enpro Technologies

4225 NE Port Dr. 

Lee’s Summit, MO 64064

Office: 815.939.0703

Cell: 816.377.5344

Fax: 816.795.6030 

Email: tlitherland@enpro-tech.com

Website: www.enpro-tech.com

From: Kavya Kasturi [mailto:Kavya.Kasturi@erg.com] 

Sent: Thursday, June 30, 2011 2:03 PM

To: Troy Litherland

Cc: Jesse Kuntz

Subject: RE: Cost request for lime feed systems

Hi Troy,
Thanks for getting back to me so quickly! Could you also provide us an estimate for the largest size system? The details for the largest size 

system are as follows:

Lime Dosage, g/min

24381

10% Lime Slurry add'n rate, gal/min

70.95

Lime Storage*, cu ft

37251.34

If it makes more sense to use multiple systems/silos for this size system, please let me know.

Thanks again!

Kavya

Kavya P. Kasturi, Environmental Engineer

Eastern Research Group, Inc.

Phone: (240) 654-2524

kavya.kasturi@erg.com

>>> "Troy Litherland" <TLitherland@enpro-tech.com> 6/30/2011 11:56 AM >>>

Hi Kavya,

The equipment price for the 600 cubic foot silo with two (2) peristaltic pumps for 10% lime slurry will be $230,000.

Equipment startup/operator training and freight are not included in the price above. General data sheet and preliminary drawings are attached for 

reference.

Please let us know if you require additional information.

Thanks for the opportunity to work on this project.

Sincerely,

Troy Litherland

Enpro Technologies

4225 NE Port Dr. 

Lee’s Summit, MO 64064

Office: 815.939.0703
Cell: 816.377.5344

Fax: 816.795.6030 

Email: tlitherland@enpro-tech.com

Website: www.enpro-tech.com

From: Kavya Kasturi [mailto:Kavya.Kasturi@erg.com] 

Sent: Thursday, June 30, 2011 1:28 PM

To: Troy Litherland

Subject: Cost request for lime feed systems

Hi Troy,

Thanks for taking the time to talk to me today. Attached is my spreadsheet including calculations of lime dose, lime slurry addition rate, and lime 

storage estimates. The first tab includes a summary of what I believe is the important information. The 2nd tab shows all the calculations.

Please let me know if any additional information would be helpful. Thanks again for your help!

Kavya

Kavya P. Kasturi, Environmental Engineer

Eastern Research Group, Inc.

Phone: (240) 654-2524

kavya.kasturi@erg.com