Who We Are
Representatives for manufacturers of municipal and industrial water and wastewater treatment equipment and environmental systems, serving Iowa and Nebraska. Our online store serves the world.

municipal water treatment
municipal wastewater treatment
industrial water treatment
industrial wastewater treatment
power plants

wastewater pumps
water pumps
sludge pumps
progressive-cavity pumps
lift stations
pressure boooster stations

Gates and Valves
air release valves
sluice gates
slide gates
flap gates
pinch valves
expansion joints

Process Equipment
aeration (fine-bubble)
aeration (coarse-bubble)
anaerobic digesters
baffle curtains
belt filter presses
clarifier covers
dissolved air floatation
gravity belt thickeners
grit traps
lagoon covers
lagoon liners
sand filters
soil-reinforcement geotextiles
static mixers
tanks (bolted-steel)
tanks (fiberglass)
turbidity barriers

ambient air monitors
inspection robots
toxic gas sensors
water quality monitors

Online Store
portable pumps
portable gas monitors
chlorination tablets
sump pumps

Can't find it?
DJ Gongol & Associates D.J. Gongol and Associates, Inc.
PO Box 180
4328 North Dawson
Cumming, IA 50061
402-965-1306 text
515-981-0581 fax

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Revenge of the Mole People

June 28, 2019

January 23, 2019

Better tanks for tricky situations

January 8, 2018

We've added Fiber Technology Corp. to our linecard. They're makers of modular FRP tanks for potable water, stormwater, and process-type applications. They can be slab-mounted, roof-mounted, or elevated, in sizes ranging from 250 gallons to more than 2.5 million gallons.

A few key points: The tanks are resistant to wear, including in tough applications like brine. They require no painting or inspections for rust (eliminating most of the life-cycle maintenance costs associated with other tanks). And some of the first tanks installed are still in service after 40 years.

Another important feature: Since FTC tanks are modular, the panels can be assembled inside existing facilities, in whatever shape is necessary to fit the existing space. So, for example, if you were trying to place a tank inside a basement area with existing foundational columns, the modular panels could be carried through existing doorways and assembled in the room, around the columns. These tanks could be real life-savers for rehabilitation projects at decades-old WTPs and WWTPs, not to mention as substitutes or replacements for steel or glass-lined tanks.

As always, contact us for more information in whatever way is most convenient for you. Brochures, supporting documents, estimates, drawings, and specs are all available at your request.

Pumping grit isn't that hard

January 5, 2018

We apply Gorman-Rupp pumps to a lot of applications pumping grit -- directly out of grit traps, as well as in other similar high-solids applications. The Super T and Ultra V Series pumps are fantastic for this kind of application, because they can work on a suction lift or on a flooded suction, and they are exceptionally easy to maintain.

There's no application quite like a headworks pumping installation to put a pump through the worst of its solids-handling paces, so the ease of accessing the impeller directly through the removable cover plate on a Gorman-Rupp self-priming pump makes a world of difference in reducing downtime and keeping the pump in service. Other pumps can only be serviced by moving the piping leading into the pump, and that's no way to operate a modern facility.

One of the recurring questions we encounter in grit service is what kind of material to use for the wetted parts inside the pump. Pumping grit is a lot like subjecting it to a constant sandblast. The default assumption in many engineers' minds is that the harder the parts, the better.

Don't make that assumption.

Hardening the parts does help to resist wear -- up to a point. But beyond a certain degree of hardness, metals tend to become brittle. For comparison, think of ceramics -- they're often extremely hard, but they also tend to shatter. You wouldn't want to get hit in the head with a ceramic vase, but you don't want to drop that vase on the floor, either.

The right metals for grit service are those that reach the optimal balance between hardness and strength. We have found Gorman-Rupp's specially-hardened ductile iron to be the best fit for the vast majority of municipal grit applications. It measures well on the Brinell hardness scale, but it also delivers much higher tensile and yield strengths than other materials that are very hard but also brittle.

In certain extreme-wear applications, Gorman-Rupp can deliver entire pump casings in this treated ductile iron, ensuring extraordinary service life in the toughest situations.

For those who are so inclined, we can offer a deep dive into the details comparing the different grades of metal available. But for most people the lesson is this: Hardness is valuable, but only up to a point. Be sure the metals you put into service have the right tensile and yield strengths -- you don't want to sacrifice strength just for the sake of going overboard for hardness.

If you have the appetite for more detail, don't hesitate to ask us!

Happy 2018!

January 1, 2018

Happy New Year! We look forward to a great year ahead, with a range of projects both large and small already on our agenda. If at any time we can do more to serve you better, please don't hesitate to contact us.

Lift station backup power options

June 8, 2017

Presented today at the Iowa WEA annual conference:

When $1.00 today is worth $2.50 tomorrow

June 7, 2017

Presented today at the Iowa WEA annual meeting:

IA-WEA meets in Ottumwa this week

June 5, 2017

We are looking forward to the IA-WEA convention in Ottumwa this week. In addition to exhibiting in the vendor hall on Wednesday (come see us!), we will also have two presentations to share with attendees. On the management track, come see "When $1 Today is Worth $2.50 Tomorrow" on Wednesday at 2:25. On the collection systems track, we will present "Backup Systems for Critical Pumping Applications" at 2:20 on Thursday.

Our booth will feature several items for you to see and touch, as well as some great giveaway items from Gorman-Rupp and Homa.

Selecting the right pump

April 10, 2017

Given today at the Iowa AWWA spring short course in Ankeny.

The calendar says it's spring

March 21, 2017

Doing more with less

March 15, 2017

Presented yesterday at the Nebraska Rural Water Association conference in Kearney:

Backup power options for pump stations

March 14, 2017

Presented today at the Nebraska Rural Water Association annual conference:

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