Sandvik Equipment Helps Make Mall Greener

Sandvik Equipment Helps Make Mall Greener

by Virginia Varela-Eyre, marketing manager Construction Americas Sandvik Construction

A Sandvik QA440 mobile screener helps Stancills Inc. carry out ground renovations at The National Mall in Washington D.C. For some, this could be a “Picture Postcard Moment!”

The National Mall in Washington D.C., one of the most popular tourist destinations in the USA, and site to presidential inaugurations and political rallies, is the country’s most visited park. With an estimated 24 million visitors a year walking on the grounds of The Mall, the soil has been so heavily trampled and compacted that grass has been hard to grow. The state of disrepair of this national symbol has long called for renovation of its grounds.
Stancills Inc. is a family owned and operated Maryland engineered soils manufacturing company located along the northern shores of the Chesapeake Bay. Founded in 1934 by G.L. Stancill, a farmer from North Carolina who ventured into the business of sand and gravel mining, Stancill started with a       collection of material from gravel banks using only a shovel and a pickup truck. He funded his enterprise with savings from his four years of service in the Army.

Rich, black topsoil rolls off the conveyor of the Sandvik QA 440 tracked screening system.

In 1938, the company’s productivity grew dramatically when Stancill acquired his first mechanical shovel and by the time the Second World War broke out, G.L.’s service to his country came in the form of his business. During that time, Stancills Inc. came to be considered essential to the war effort.
As the business grew successfully, it went on to be operated by three of G.L.’s four sons. Today Stancills Inc. is run in partnership by G.L Stancill’s son Terry and Terry’s daughter Emlyn Stancill.

Emlyn and Terry Stancill specialize in quality soils like those being replaced at the US Capitol.

Changing Times
As the area grew, the market for construction materials became a very competitive one. Stancills Inc. needed a new strategy to stay ahead of the game. The demand for manufactured soil in the region,         combined with environmental legislation requiring the use of specialized soils for storm water mitigation, made the engineered soils business a worthwhile choice.
Accordingly, they chose to diversify into that      specialty and away from sand and gravel mining. This vision, combined with the attention to detail of      customers’ current and future needs, allowed the new business model to thrive. It made Stancills Inc. the engineered soil supplier of choice within the region. Most recently, this company stature proved essential in winning the contract for the topsoil screening project at the National Mall.
The task of renovating the topsoil of one of the national symbols of the USA is not a minor one. The required material specification was very fine: 1/2-inch. This material needed to be sized out from the grounds, which, over time, had accumulated a considerable amount of debris and gravel. This kind of precision screening requires a very productive and reliable machine.
The Stancills chose the Sandvik QA440, a tracked unit which features Sandvik’s unique, revolutionary, patented Doublescreen technology. “We chose Sandvik because of the competitive pricing and the (unit’s) quality of course,” says Emlyn. “But most of all, we chose the Sandvik unit because of the excellent support received from Chris Quinn, from AES. His customer service (to us) has been essential. More than a salesman, he has felt like a member of our team.”

An operator dumps a load of soil to be screened into the intake hopper of the QA 440.

The Mall jobsite
The work involved feeding the stockpiled, excavated soil directly into the hopper with a loader. The QA440’s hopper can handle up to 14.8-square-yard and can be also fed from an excavator or another screener if so configured.  In order to achieve the 1/2-inch final product size required, this machine was  fitted with 2 and 1/2-inch square meshes. The top mesh screened out oversize material, which was abundant in this project.
The unit’s Doublescreen design allows for the two screen boxes to be tilted at different angles to one another for optimum efficiency. In this application, the first box was positioned at a very steep angle in order to quickly eliminate the oversized material. Because this technology is unique in the market, it makes this machine one of the most efficient and reliable mobile screeners available.
Additionally, the QA440 boasts an impressive 20-foot x 5-foot screening area with side and main     conveyors designed for massive stockpiling capabilities of over 16-feet, 10-inches. This makes the QA440 ideal for demanding applications where production is key.
Because the unit is track mounted and self-propelled, it can be easily maneuvered within the site via remote control. That allows for easy movement and a quick start up for production in a different location. In this way, the QA440 is ideal for screening jobs where reliability, flexibility, mobility and high production are paramount. It was especially helpful on The Mall project as it is in other urban locations with restricted access.
Area Manager Chris Quinn, from Advanced Equipment, distributor for Sandvik mobile crushers and screeners in the Mid-Atlantic States, says: “Dealing with Terry and Emlyn has been an absolute pleasure. They were keen in getting the right equipment and working closely together with them in order to understand their needs has been essential. It gives me great joy to see how we have contributed to make their business prosper.”
For more information on Sandvik Construction, contact them at 404-589-2823 or e-mail:

VPPSA McCloskey Trommel

VPPSA McCloskey Trommel


Donnie Bonovich, Compost Facility supervisor and David Bleeks, McCloskey representative from Commonwealth Equipment, talk about future considerations for VPPSA and the upcoming equipment needs for 2012 as the facility's McCloskey 733 Trommel is busy processing a row of finished composted mulch.

When consumers head to the Virginia Peninsulas Public Service Authority (VPPSA) Compost Facility in Yorktown, VA for their composted mulch or specialty soil products for their landscaping projects, they are assured of a consistent, quality product. That is because the compost has been carefully screened with a McCloskey 733 trommel screener before it is sold to the public. In a recent visit to VPPSA, Waste Handling Equipment News had the opportunity to see the McCloskey 733 in action while VPPSA was preparing a stockpile of composted mulch for future sale.
According to Donald “Donnie” Bonivich, the Compost Facility supervisor for VPPSA, all of the composted mulch goes through the 733 trommel as the final step in the composting process. “When a windrow has cured for the appropriate length of time, we screen it with the trommel,” Donnie said. “The overs are returned to a compost windrow for further composting and the screened material is either moved to our sales area near the entrance to the  facility, or it is stockpiled for future customer sales and direct shipment to large consumers. With this trommel, we can screen three tractor trailer loads of material in about an hour, if we need to.”

Composted mulch is run through the McCloskey 733 Trommel before being moved to the outgoing materials piles for sale or shipment.

Donnie explained that VPPSA consumers come from communities in Hampton, Poquoson and York Counties in Virginia. “VPPSA is a ten city and county solid waste authority,” he said. “Facility members include the Cities of Hampton, Poquoson and Williamsburg and the Counties of Essex, James City, King and Queen, King William, Mathews, Middlesex and York. The Towns of Tappahannock, Urbanna and West Point are also members.”
As we toured the facility, Donnie said that the first step of the process is the material is ground using a tub grinder. Then, it is placed into windrows that are several hundred yards long, eighteen feet wide and about seven feet tall.
Over the next six months, the windrows are      monitored as they cure. This is done to ensure      consistency. During the curing process, temperatures in the stockpiled compost can reach 160 degrees. These products are cured for a minimum of three months. This curing process ensures that the material is weed seed, bug and pathogen free making it safe to place around a customer’s property.

Donnie Bonovich, Compost Facility Supervisor and David Bleeks, McCloskey Representative from Commonwealth Equipment, help give perspective to the size of the 733 Trommel.

From there it goes through the tub grinder again, which feeds the second grind directly into the McCloskey 733. This reduces an extra handling step of manually feeding the reground material into the trommel. During this screening process, the McCloskey 733 separates the material into the two available products, mulch fines and reground mulch. Once the material has rested, usually thirty days, the process is complete and the material is ready for sale, for the 2012 season, VPPSA offers four products for sale: reground mulch, mulch fines, compost and a soil blend. Since this visit to the VPPSA facility, Donnie tells us that they have begun coloring mulch with a newly acquired Diamond Z 1352BL tub grinder, and they will be offering colored mulch as part of their product line. This product was offered several years ago, but with the economy people were leaning toward the lower prices offered on regular mulch. With renewed interest, they will be offering it again.

An attendant at the entrance to the VPPSA site, watches customers unload leaves onto the incoming stockpile.

VPPSA is a member of the U.S. Composting and the newly formed Virginia Composting Council. For more information about the VPPSA compost facility,      contact them at 757-898-5012 or for information about all of the VPPSA programs visit them online at