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

DBP2100 field trial OR 003 DBP2100 field trial OR 004DBP2100 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 010DBP2100 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 016DBP2100 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 022DBP2100 field trial OR 023 DBP2100 field trial OR 024

DBP2100 field trial OR 025 DBP2100 field trial OR 026To: StormKlear Team
From: Glenn Althoff Date: Nov 25, 2009

T RIP REPORT: FIELD USE OF DBP

- 2100 SOCKS
SUMMARY

I got my first look at our Gel Floc 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 sign ificantly
after the first DBP sock, but not the GelFloc sock that preceded it.

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

,
s o 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 1 st DBP 230 15 27,24

5 After 2 nd 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 rig ht 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). W a t t l e

W a t t l e

Collection
Basin ( Drains to City )
6 Collection
Basin
1 

### Treatment Schematic

, showing Sample Points

2 W a t t l e

GelFloc Sock

3 Gravel Berm W a t t l e

White DBP Sock

4 W a t t l e

W a t t l e

W a t t l e

W a t t l e

W a t t l e

W a t t l e

Black DBP Sock

5 W a t t l eCollection 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 wood

chip 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, berm ed 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 fl ow.Looking u p 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.