eNewsletter March 2009

Topic "Dewatering"

We are proud to present you our 2nd eNewsletter March 2009.

The Spring weather has certainly brought on new projects and opportunities even with the bleak economic forecast. Our product development has definitely put us in a good position to cater to the infrastructure projects which “shovel ready” in the USA. We have seen some great new markets open in the European and Latin American markets due the diligent efforts of our dealer network.

With our eNewsletter March 2009, we would like to take the opportunity to educate our customers and website visitors about current dewatering projects and FAQ. Enjoy!

Have a Happy Easter to you and your loved ones,

Mark Wilkie, President

Dewatering Projects

by Mike Koriot, Nevada Golf Balls (Reno, Nevada)

My company, Nevada Golf Balls took over a dredging job for a golf course in Nevada in the winter of 2008/2009. Their lake had a liner in for 15 years that was built up with leaves and grass. Tulips, very common in this area, also grew in the lake. The main problems were the odor and the aesthetic of the landscape. The golf course was very concerned about the project procedure, the increasing odor when we would pump out the water and how the whole landscape overall would appear. With the Granite Environmental, Inc. dewatering bags, we could offer a great solution to our customer. With the pumps, we vacuumed the bottom of the lake, filling the dewatering bags every day. We were able to finish the job on time. Our jobsite looked clean, professional, and the odor didn’t increase at all.

We just started this new business entity and it was our first job so it was very important for us to be successful. We searched for qualified technical support and products online. Mark Wilkie from Granite Environmental, Inc. was able to confirm our ideas and suggested the use of dewatering bags. What Mark’s solution was and what happened in reality on the jobsite was exact. Time was a big issue for us, and we were pleased to receive the dewatering bags on time before the project started. Overall, Granite Environmental’s customer service satisfied us in every way. It was a pleasing experience.

Nevada Golf Balls, originally an online golf supply provider, opened up a new business entity and is now available for dredging jobs and to salvage golf balls from lakes. Nevada Golf Balls provides their service to golf courses, home owner associations, boat docks, and owners of small lakes. Service areas: Nevada, Arizona, Oregon, Idaho, and Washington.

Mike Korioth, Nevada Golf Balls, located in Reno, Nevada www.nevadagolfballs.com

Picture of Dredging Job Nevada Golf Course - CLICK HERE.

FAQ Dewatering - Geotextile Tubes

• Geotextile tubes are flexible in their application and can provide benefits over other dredging dewatering options in the area of cost, quality and ease of use.

• Physically they are made up of woven geotextile fabric Materials that are designed in such a way to retain suspended solids & sediment and allow water to pass through the gaps in the woven fabric.

• The dewatering rate and effluent quality will depend on the sediment, system used and the operating conditions.

Why is a smart to do a hanging bag test before I purchase a Geotextile Tube?

The hanging bag test is a low cost / low technology approach to assessing the performance of geotextile fabric in combination with a sludge from a potential job site.

It can be useful for: • quick on site evaluations. • evaluating the cake formation. • effluent for water quality testing. • water flow rate. • demonstrating the concept to a client. • first hand look at the dewatering characteristics of the sludge. • checking the effectiveness of polymer addition.

How does the hanging bag test work?

• The hanging bag details (fabric) should be noted and it is suspended on a suitable structure / frame (eg tree, fence, brick and pole arrangement). • The bag is typically 3 x 2,5 feet in size and a slurry sample is placed in the bag. (the sample is of typically 5 Gal of sediment that is watered down if required to replicate the condition of the sludge that will enter the bag during the project). • The effluent from the bag is collected for evaluation to see the quality and also the time is taken to establish the rate of dewatering (this provides a guideline). • The sludge should be checked regularly for the first few hours and then left to stand for 6-8 hour and checked again. It can then be left for a few days to evaluate how dry the sludge becomes and is suitability to be handled during the removal process.

Hanging bag tests give an indication of the dewatering characteristics of the sludge and a pressure filtration tests using the selected tube should be conducted on a small scale to establish the consolidation rates. They are typically better than the results achieved in the hanging bag test.


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