January 25, 2021
January 22, 2021
October 29, 2020
Turbidity Barrier
This is a turbidity barrier, also known as a turbidity curtain. We are using it to contain sediment during a riverbank restoration project.
October 7, 2020
Turbidity Curtain Protection
While working this riverbank habitat restoration project, we rely on a turbidity curtain protection to contain turbid water.
May 7, 2020
Turbidity 1-25-250 NTUs
The sample on the left is just under 1 NTU, the middle is 25 NTUs, and the one on the right is 250 NTUs. In Washington state, the Construction Storm Water General NPDES Permit lists benchmarks that construction discharges must meet. These are: 0-25 NTUs everything is cool; 26 -249 NTUs not so good, upgrade your site best management practices (BMPs) and modify your SWPPP; 250 NTUs and above, call the Dept. of Ecology, upgrade BMPs, modify the SWPPP and monitor the water body that the project discharges to until you are in compliance.
January 28, 2020
Full Depth Turbidity Curtain
If there was any doubt that turbidity curtains work…
March 21, 2017
Turbidity Reduction Techniques
International Erosion Control Association (IECA)Webinar
Turbidity Reduction Techniques for Pumping Operations on Construction Sites
Have you ever sampled and measured turbidity numeric levels for pumping or dewatering operations on your construction site? How turbid is your discharge from your work zone while working on a borrow site or pipe culvert near a stream? Will your discharge meet effluent limits prior to entering jurisdictional waters? This webinar will cover a number of techniques to reduce turbidity levels from pumped effluent. Learn about new technologies, design strategies, and case studies to maintain water quality near your construction operation.
Instructor: Ted Sherrod, PE, CPESC, CPSWQ
Date: March 23rd,2011 noon central time
PDH: 1
One certificate is issued (to the registered participant), per paid registration.
Members: $50
Non-Members: $65
Have you ever sampled and measured turbidity numeric levels for pumping or dewatering operations on your construction site? How turbid is your discharge from your work zone while working on a borrow site or pipe culvert near a stream? Will your discharge meet effluent limits prior to entering jurisdictional waters? This webinar will cover a number of techniques to reduce turbidity levels from pumped effluent. Learn about new technologies, design strategies, and case studies to maintain water quality near your construction operation.
For additional information, contact:
IECA
Holly Nicholson
Phone: 303-640-7554
Fax: 866-308-3087
Email: holly@ieca.org
December 30, 2011
Pumping to Dirt Bag Doesn’t Reduce Turbidity of the Water
I know, great name for an erosion and sediment control product, right? Dirt bags work great if you are trying to reduce the total amount of sediment being discharged from a project. But, if you have to reduce the turbidity of the water to meet water quality standards, this won’t do it.
August 19, 2011
Calibrate a Turbidity Meter
This video by the Washington Stormwater Center, demonstrates how to use and calibrate a turbidity meter, as well with how to set up a water sample for reading, and how to record the results.
November 4, 2020
Silt Fence Inspection
This silt fence looks pretty ugly and inspection shows it certainly needs maintenance; but does it? The silt fence made sense before we excavated several feet, now it doesn’t. There is a turbidity curtain in the river to the right and the contractor is careful to pull material back from the riverbank. I am going to let this go.