Beaverton, OR Site

Information Provided by Nick Scappini, HaloSource

08/24/2010 02:43 PM

Jesse-I will be sending you many of these over the course of the next few days. Attached above is the 

written case study and the BMP design that was being deployed. This is what we call truly passive 

treatment with no flow control at all. Many more will come.

DBP2100 field trial OR 002

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DBP2100 field trial OR 005 DBP2100 field trial OR 006

DBP2100 field trial OR 007 DBP2100 field trial OR 008

DBP2100 field trial OR 009 DBP2100 field trial OR 010
DBP2100 field trial OR 011 DBP2100 field trial OR 012

DBP2100 field trial OR 013 DBP2100 field trial OR 014

DBP2100 field trial OR 015 DBP2100 field trial OR 016
DBP2100 field trial OR 017 DBP2100 field trial OR 018

DBP2100 field trial OR 019 DBP2100 field trial OR 020

DBP2100 field trial OR 021 DBP2100 field trial OR 022
DBP2100 field trial OR 023 DBP2100 field trial OR 024

DBP2100 field trial OR 025 DBP2100 field trial OR 026
To: StormKlear Team

From: Glenn Althoff

Date: Nov 25, 2009

TRIP REPORT: FIELD USE OF DBP-2100 SOCKS

SUMMARY

I got my first look at our GelFloc socks and the new DBP-2100 socks in use at a 

highway construction site in Beaverton, Oregon. Deployment was completely passive, 

with the socks in an open swale below an on-ramp. Turbidities dropped significantly 

after the first DBP sock, but not the GelFloc sock that preceded it. 

There was no rain during the visit, and runoff was only about 5 gal/min (visually), 

so I do not know how this would perform in high water flow. The current configuration 

has been in use for about a week, but further details are not available. I performed the 

sampling on site, along with taking the attached pictures. 

11 AM Sampling 1 PM 

Sampling

Sample Conductivity, 

uS

Turbidity, 

NTU

Turbidity, 

NTU

(Replicates)

1 Untreated 205 53 42,44

2 In First Pond 67,71

3 After Gelfloc 230 84 80,79

4 After 1st DBP 230 15 27,24

5 After 2nd DBP 15,17

6 At Collection 

Basin 230 14 14,14

A rough schematic of the treatment sequence and pictures are shown below. 
The jobsite was a road widening project along Highway 

217, a four lane freeway near Beaverton, Oregon. A 

large concrete retaining wall on the right is being built 

to hold back a hill side, and all water on the site drains 

down toward you and to the right. Scattered straw is 

used to stabilize the working surface.

Treatment was done in a swale between the freeway 

 and an on-ramp. Equipment was a series of wood-chip 

 filled wattles and gravel berms, with our socks being 

 the only chemical used. 

 Contact was Alex Zimmerman of CSI (Cell = 360/910-

 4800).

Wattle

Wattle

Collection

Basin (Drains 

to City)

6

Collection 

Basin

1

Treatment Schematic, 

showing Sample Points

2 Wattle

GelFloc Sock

3

Gravel Berm

Wattle

White DBP 

Sock

4 Wattle

Wattle

Wattle

Wattle

Wattle

Wattle

Black DBP 

Sock

5 Wattle
Collection point (my sample #1) is an 

overflow into this concrete catch basin. A 

board & sandbag prevent large debris 

from entering. Discharge goes 

underneath the adjacent onramp, and out 

to a swale. 

This is the other side of the 

onramp. The feed pipe 

would be on the upper right 

of this picture, except that 

gravel has fallen down to 

obscure it. First stop is this 

first pond (my sample #2), 

constructed with a woodchip filled wattle, and held 

in place with stakes. I 

suspect this first pond is 

just to slow down the flow, 

since no treatment is done 

here. 
At upper left is the first pond. Below that is a small, bermed pond with a GelFloc sock 

(along with an older, exhausted sock; my sample #3). At center is the first DBP sock, 

shown in the course, white fiber fabric. Below is a detail of that sock, complete with boot 

print. A quarter inch layer of loose material has formed outside the sock. I assume this 

would dissolve with a higher water flow. 
Looking up the swale at the second DBP sock, just above the fourth large wattle (my 

sample #5). This sock (detailed below) is the tighter, black fabric, and is currently sitting 

in a pool of water. It does not display as much material coming out through the fabric, 

but it does show where some material is floating around loose in the pond. 
This is the view 

looking up at the 

treatment swale, 

with the collection 

basin on the lower 

right. 

Water is actually 

flowing down the 

swale, but at a 

low enough rate 

that it disappears 

below the gravel 

in places. 

Detail of the 

collection basin (my 

sample #6). 

Underneath the

small wattles in the 

middle is a concrete 

basin that feeds to 

the city. 
StormKlear®

by HaloSource

It is important to direct site water drainage to the top of the treatment 

channel. This can be done with berms, wattles, rock etc. Any water that 

bypasses the channel will likely remain turbid.

In most cases, the StormKlear DBP-2100 sock(s) should be placed rst in the treatment channel, 

followed by the GelFloc sock(s) and then no biopolymer at the last wattle(s). 

 The wattles should be placed on top of 2’ to 3’ wide mat made of coir, jute, etc... to prevent 

channeling under the wattle. 

· The StormKlear sock(s) should be located at on the mat on the downstream side of the wattle, 

perpendicular to the ow. 

· They should be pinned in place to maintain their location. 

· Jar testing should be performed to determine the number of socks required.

· StormKlear Residual Biopolymer test kit should be used at the end of the treatment prior to site 

discharge.

· Number of wattles is determined by channel slope follow local design regulations, the pooled 

water should back up just to the base of the higher wattle (as shown).

· Number of StormKlear sock(s) is calculated based on jar testing for settling velocity, turbidity & 

dose rate.