NCS000597_Tier 3 Action Plan_20240723

Peterson, Kathryn S
From: Eplin, Jerry W
Sent: Tuesday, July 23, 2024 4:11 PM
To: Peterson, Kathryn S
Subject: FW: [External] Galvan Industries, Inc. - Tier 3 Action Plan
Attachments: Galva nIndustriesTier3ActionPlan_07.09.2024.pdf
For your review and comment. I will review as well.
Jerry W. Eplin, PE
Regional Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources
Office: [phone]
Email: merry.eplina-deg.nc.gov
Physical and Mailing Address:
610 E. Center Ave. Suite 301
Mooresville, NC 28115
D,E QR&7,A-
6Ui}�rlmen{o1Eny�ronmpiinl q�allYy
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties
From: Lefitz, Alex<[e-mail]>
Sent:Tuesday,July 9, 2024 9:18 AM
To: Eplin,Jerry W<[e-mail]>
Cc: Laurens Y Willard <[e-mail]>; Harshad Londhe<[e-mail]>; Kristi Wilson
<[e-mail]>; Filardi, Mark<[e-mail]>; Gigante, Matthew J
<[e-mail]>
Subject: [External] Galvan Industries, Inc. -Tier 3 Action Plan
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message
button located on your Outlook menu bar on the Home tab.
Hi Mr. Eplin,
On behalf of Galvan Industries, Inc. HDR has prepared a Tier III Action Plan (attached)to address concentrations
of zinc and cooper in stormwater that exceed benchmark criteria at the Galvan facility.The components of this Tier
III Action Plan have been incorporated into the DRAFT SWPPP that has been prepared as part of the Galvan NPDES
Individual Permit(NCS000597)and requested in the NOV issued on October 26,2023 and extension granted on
1

March 28, 2024.The a copy of the DRAFT SWPPP will be available for Mr. Gigante to review on-site during his next
scheduled visit on Thursday July 11,2024.
Please let us know if you have any questions
Regards,
Alex Lefitz, PG(NC)
Senior Geologist
HDR
440 S. Church Street,Suite 1200
Charlotte, NC 28202
D 704.973.6879 M 704.430.3469
alex.lefitz(a)_hd rinc.com
hdrinc.com/follow-us
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
2

July 9, 2024
Mr. Jerry Eplin, PE via email at. Jerry.Eplin(a)deg.nc.gov
Acting Regional Engineer
Stormwater Program
Division of Energy, Mineral and Land Resources
North Carolina Department of Environmental Quality
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
Subject: Tier Three Action Plan
Permit No. NCS000597
Galvan Industries
7315 Galvan Way, Cabarrus County, Harrisburg, NC
Dear Mr. Eplin,
On behalf of Galvan Industries, Inc. (Galvan), HDR Engineering, Inc. of the Carolinas
(HDR) has prepared a Tier Three Response under Individual Permit NCS000597 for the
Galvan facility located at 7315 Galvan Way in Harrisburg, Cabarrus County, North
Carolina. The Action Plan described herein applies to copper and zinc.
Documentation of Benchmark Exceedances
Parameter Units Benchmark March 2021 February 2022 November 2022 January 2023
Values OF#1 OF#5 OF#1 OF#5 OF#1 OF#5 OF#1 OF#5
Copper mg/L 0.010 0.17 0.206 NA 0.012 5.00 0.0447 0.0863 0.0190
Zinc mg/L 0.126 5.3 35.8 NA 7.91 13.8 20.8 3.27 9.00
mg/L=milligrams per liter Prepared by:ARL; Checked by:CSH
NA=Not Analyzed
OF=Outfall
NCDEQ Notification
Following receipt of laboratory results indicating benchmark exceedances, Galvan
provided the Stormwater Discharge Outfall Monitoring Report to the NCDEQ Regional
Office in Mooresville, North Carolina in February 2023, notifying the office of the sampling
events' exceedance dates, pollutants, and values.
hdrinc.com
440 S Church Street,Suite 1200,Charlotte, NC 28202-2075
T 704.338.6700 F 704.338.6760

Mr.Jerry Eplin
July 9,2024
Page 2
Stormwater Mitigation Efforts
In January 2023 Galvan implemented the Zinc Management Plan (Plan) that was
approved by the Division of Energy, Mineral and Land Resources (DEMLR). While
specifically designed to manage zinc in stormwater, the implemented Stormwater Control
Measures (SCMs) also capture other metal constituents including copper.
The Plan included regrading of approximately 455' of drainage ditch south of the electrical
product building at the facility that were then lined with non-woven geofabric and limestone
surge stone. Two (2) check dams were installed to slow flow during heavy rainfall events
and capture sediment transported to outfalls via the ditches. The limestone surge stone
slows surface water flow, captures sediment, and buffers potentially low pH prior to
entering the stormwater discharge outfalls.
In addition, one (1) 16-foot-long limestone check dam around Outfall (OF) -2 on the
southern portion of the site was installed. The check dam was constructed of blankets with
MetalCompliant filter bags from Gullywasher designed to filter metal-laden stormwater
prior to discharge. In addition to limestone surge stone around OF-2 Gullywasher inserts
were installed in two stormwater drop inlets at the site (at OF-1 and OF-5). The drainage
ditch feeding into Outfall #1 is lined with limestone, filter bags, and check dams. The filter
bags and drop inlet inserts are periodically washed and last approximately 2 to 3 years,
depending on site specific sediment loading and frequency of maintenance. The outfalls
and areas with implemented improvements are shown on Figure 1.
Effectiveness of these metal management and SCM improvements are monitored through
monthly qualitative and quantitative monitoring, in accordance with condition D-1(e) of the
Permit. One qualifying rainfall event has occurred during normal business hours (M-F
8:00-5:00) since the Plan was implemented in January 2023. These results were
submitted to the agency in February 2023. Analytical results indicated that the
implemented SCMs (i.e., metals-absorbing mats, filter bags and booms installed in and
around stormwater inlets and outfalls) were effective at lowering the zinc and copper
concentrations in stormwater, although concentrations still exceeded the benchmark
criteria. Additional sampling during qualified rain events is needed to further assess the
overall effectiveness of the Plan.
Stormwater Management Inspection and Identification of Feasible Actions
On April 22, 2024, Mr. Laurens Y. Willard, Mr. Harshad Londhe and Ms. Kristi Wilson of
Galvan and Ms. Alex Lefitz with HDR, conducted a stormwater management inspection. At
the time of the inspection the source of zinc and copper in stormwater was discussed.
Based on the inspection, both constituents were used in on-site processes and moved
across the site as dust by wind and vehicular traffic (such as forklifts and shipping
vehicles). During the inspection Galvan and HDR noted that portions of a drainage ditch
upstream of installed check dams were filled with sediment; the metal-absorbing mats
within the check dams were covered in sediment; and dust and debris surrounded OF-1
and OF-5.

Mr.Jerry Eplin
July 9,2024
Page 3
The following feasible actions were identified:
1) Galvan will dredge the filled drainage ditch and wash the metal-absorbing mats
every six months or more frequently as needed. The metal-absorbing matts will be
replaced every two years or more frequently depending on rainfall in accordance
with manufacturer guidelines.
2) Galvan will wash booms, metal absorbing matts and metal compliant stainless
steel catch basin inserts as part of continued maintenance event six months or
more frequently as needed. The booms, metal-absorbing mats and metal
compliant stainless steel catch basin inserts will be replaced every two years or
more frequently depending on rainfall in accordance with manufacturer guidelines.
3) Galvan will continue good housekeeping efforts such as trash pickup and sweeping
of operation areas to maintain a cleared area around OF-1 and OF-5.
4) Galvan will limit landscaping activities (i.e., mowing) around stormwater drainages
and outfalls to allow for natural filtration of stormwater flow.
Should you have any questions or need additional information, please contact Mark Filardi
at 704.338.6787 or Mark.Filardi(a-)_hdrinc.com.
Sincerely,
HDR Engineering, Inc. of the Carolinas
Mark P. Filardi, P.G.
Senior Geologist/Project Manager
Enclosure
Cc: Laurens Willard, Galvan
Laurens Y. Willard, Galvan
Harshad Londhe, Galvan
Kristi Wilson, Galvan
Attachments
1. Figure 1 — May 2024 NPDES Outfall Map
2. SCM Specification Sheets

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Figure 1 — May 2024 NPDES
Outfall Map

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w OF-2 350 18'48.59" N 800 40' 52.45"W s° o _ _ _ _ _ _ Limestone Lined Ditch with Check Dams and
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v\
SITE MAP DATE
GALVAN INDUSTRIES, INC. MAY 2024
1.ORTHOIMAGERY FROM NC ONEMAP,2023 0 50 100 200 300 FN CABARRUS COUNTY, NORTH CAROLINA
2.PROPERTY BOUNDARY FROM MECKLENBURG AND CABARRUS COUNTIES'GIS WEB REPOSITORIES e FIGURE
Feet NDRE SChae uceNnebra6eac aseNum4075 6 NCDEQ INDIVIDUAL PERMIT NCS00597
3.RAIL FROM MECKLENBURG OPEN MAPPING REPOSITORY aosenurcnn sneee,smre woo enalloire,Ne zazaz-zors
4.RAIL ROW ESTIMATED FROM 100'BUFFERAROUND RAIL LINE 1

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SCM Specification Sheets

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Operation and Maintenance Instructions
Meta I.Com ptian t Basket Style Insert
Thanks for Taking the Time to Read These
Operation and Maintenance Instructions

Basket Style MetalCompliant Insert Operation and Maintenance Manual
Table of Contents
Installed Gullywasher Basket Style MC Insert Project Specifications .. .. .. . . . .. .. .. . . . .. .. .. .. . . . . .
1. Introduction and System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Basket Style MC Insert Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Basket Style MC Insert Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.Wet Start-Up Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2. Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3.Sampling Protocol and Methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Maintenance Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.Basket Style MC Insert Media Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Routine Monthly Maintenance — Insert Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.0il Skimmer Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Material Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Maintenance Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6. Best Management Practice Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5242 57th Avenue South
Seattle, WA 98118
Telephone 2o6.799.3296
[e-mail]
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
Important!
• Once Basket Style MC Insert is installed, do not neglect upstream source control and stormwater
management. This may result in the premature fouling of the Basket Style MC Insert's filtration
and pollutant reduction capacity, shortening its life.
• Do not flush spills or otherwise into Basket Style MC Insert to capture pollutants from pressure
washing roof surfaces or HVAC equipment washing.
• Regular maintenance of the Basket Style MC Insert will ensure optimal performance results as
well as increase the lifespan of its exchange media.
• Do not pressure-wash the inside of the Basket Style MC Insert. Use only city water pressure
(as in a standard hose) for washouts.
• Stormwater sampling should be done with care. Use new sampling bottles and avoid
contaminating samples with dirt from the Basket Style MC Insert or your hands.
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
s. Introduction and System Description
The Gullywasher MetalCompliant Basket Style Catch Basin Insert is a passive filtration technology that utilizes a geo-
textile filter fabric and sodium-based exchange media.The BioFilter is designed specifically for reduction of storm-
water pollutants such as suspended solids, turbidity, heavy metals, petroleum compounds and organics
from industrial sites.
The Gullywasher MetalCompliant Basket Style Catch Basin Insert is a patent pending process that uses the:
• Geotextile Filter Fabric for removing the incoming suspended solids.
• Floater Pillow for diffusing the incoming stormwater stream over a wide area inside the insert
while absorbing all petroleum contaminates.
• Gullywasher Sodium-Based Exchange Media for fixating the metal ions and colloidal particles
through the exchange with sodium ions.
It is a simple process of which the stormwater enters into the catch basin where the MetalCompliant insert is
placed into. The stormwater hits the floater pillow; thereby getting diffused into a wider area and slowing down the
stormwatervelocity. Since the floater pillow is made of polypropylene absorbent material; the organic compounds,
as in petroleums, will be absorbed into the floater pillow. The geotextile filter fabric construction will filter out the
suspended solids; thus stripping out these contaminates that can foul the sodium exchange media downstream.
Finally the sodium exchange media will strip out the metal ions and colloidals prior to exiting out of the insert.
Note: In order for our MetalCompliant insert to effectively perform, they will need to be maintained by thoroughly
rinsing them out and reuse. If the dirt, muck, and/or fines are allowed to build up, our inserts will bypass the
stormwaterflow untreated while the insert life will be diminished. Unfortunately our inserts are doing exactly
what they are design to do, remove the contaminates from the incoming stormwater. However, they must be
cleaned continually.
Fortunately we have designed our inserts to be maintenance friendly.
• Our ergonomic lift straps (patent pending) will allow the worker the ability to use his/her legs
for proper lifting the insert out of the catch basin.
• Our basket design will allow the worker to place our MetalCompliant insert directly onto the ground
without fear of spilling the contaminated contents out of the insert.
• Our insert can be installed and removed without any tools necessary for the use of our hold-down tabs
(patent pending).
• Our basket design is self supporting while in the catch basin, allowing the worker the ease of removing
and returning the heavy catch basin grate with no extra help from others.
• By turning our insert inside out, the accumulated muck will wash off cleanly and fast.A description
of the Basket Style MC Insert models with their options is provided below.
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
MetalCompliant Insert Model Descriptions
Basket
Catch Basin Size* Special
Basket Style (Length x Width) (Biochar or Oyster)
1811 X 241' 1811
x 24" 1811
x 24°
20" X 20" -- 20" X 20"
20" X 24" 20" X 24" 20" X 24"
�4" X �4„ �4" X �4„ �4" X �4„
27" X 27" 27" X 27" 27" X 27"
28" x 28" 28" x 28" 28" x 28"
�4„ x 30" �4„ x 30"
*Custom Sizing Available
**Stainless Steel Transition Plates
2. Basket Style MC Insert Operations
Regular inspection and maintenance is required for the proper operation of the Basket Style MC Insert. Conditions
at each site can vary at a point that the general maintenance requirements can not be prescribed without adding
new conditions to the regular inspections.
Inspections will determine the type and frequency of maintenance required. It is the regular maintenance that
keeps the Basket Style MC Insert operating at optimal conditions to improve its performance and media longevity.
2.1. Wet Start-Up Procedures— Initial First Storm Event
The Gullywasher Basket Style MC Insert for catch basin purification is typically installed during dry weather;
however once properly installed, there are no final steps to put the Basket Style MC Insert online.
During the first storm event, it is imperative that the owner check the entire process system thoroughly for
its general process operation in accordance to that stated in this manual.
Step 1. Insert Operation:
Monitor the insert throughout the first storm event to confirm stormwater is properly passing through Basket Style MC
Insert. Inspect the stormwater flow of its free flowing discharge into the body of the insert, not the overflow ports.
If the stormwater is flowing directly into overflow ports, reset the insert.
Step 2.After Storm Inspection: Inspect Basket Style MC Insert after the storm event. Normally, there will be an
accumulation of fine solids inside the insert. If the solids loading starts building up visibly onto this geotextile
media channels, maintenance may have to perform an insert cleaning(Section 3.1.1 on page 8).
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
Note:Additional upstream source control may be beneficial to reduce sediment loading to the system.
2.2. Inspections
During the first rainy season, inspections should be conducted weekly or every two to three storms to establish
site-specific inspection and maintenance intervals. Regular inspections will verify that the system is in good
operating condition and should be recorded as part of the monthly inspection program and the facility
Stormwater Pollution Prevention (or Control) Plan (SWPPP or SWPCP).
Inspections are also recommended after every major storm event.An Inspection Report is included at the
end of this manual to assist with record keeping.
Flow Rate Monitoring
• Verify that the flow rate of the stormwater into Basket Style MC Insert is not pooling to a point
where the stormwater can overflow and bypass the insert.
Insert Filter Chamber
• For Basket Style MC Insert with oil absorbent pillows)
a. Inspect the treated stormwater surface for oil sheen. If oil sheen is present, replace
the oil adsorbent pillow.
b. Inspect for the accumulation of solids and debris on the inner surface of the geotextile insert.
Before removing accumulated debris, make sure when lifting the insert out of the catch basin that
any accumulated solids-laden water will not fall into the catch basin. Thoroughly wash the insert
and test for flow.
c. Inspect the side walls of the Filter Chamber
for heavy oil and debris accumulation. If heavy
oil and debris are present, follow the mainte-
nance steps described in the Section 3.2.
f
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
2.3. Sampling Protocol and Methodology
Water quality samples should be taken only when the system has been maintained and is operating effectively
(see Section 2.1). Unlike the Gullywasher MC Basket Insert, there are no outlet sample ports on Basket Style
MC Insert for provide a convenient and reliable method of taking samples.
Use caution when collecting water quality samples to prevent contamination of the sample bottles. A small
amount of dirt goes a long way to contaminating a stormwater sample. Make sure the sample port and your
hands or gloves are clean before collecting your compliance sample.
The following precautions should be taken immediately before sampling:
a. Use the proper unused sample bottle — do not reuse sample bottles.
b. Do not touch the sample bottle to the sample port.
c. Do not put fingers inside or around the sample port or the mouth of the sample bottle.
d. For sample bottles with liquid preservative inside, do not allow the bottle to overflow.
e. Cap the sample bottle as quickly as possible. Store on ice. Ice helps reduce the amount of metals that
move from particulate to dissolved phase and reduces the rate of growth of biological organisms within
the sample bottles.
f. Gullywasher recommends sampling the inlet to the Basket Style MC Insert each time that the outlet is
sampled. Without the inlet sample data, Gullywasher LLC cannot diagnose or provide recommendations
on tuning system performance.
g. The inlet should be sampled approximately so minutes before sampling the outlet to get the most r
epresentative inlet/outlet sample pair.
When lifting the Basket Style MC Insert out of the catch basin for sampling; for best results, lift the insert out
using the overflows in the frame as opposed to using the lift straps. This will minimize the disturbance of the
insert and get a better representative sample of the insert's performance.
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
3. Maintenance Guidelines
The Basket Style MC Insert, like all filtration systems, requires periodic maintenance to restore the system to its
original effectiveness.
The type and frequency of maintenance required for the Basket Style MC Insert varies significantly from site
to site due to differences in facility operations, upstream stormwater management, and rainfall frequency.
Routine inspections conducted on the Basket Style MC Insert will help to determine how frequently to maintain
your Basket Style MC Insert stormwater filter(see Section 2.2).
3.1. Basket Style MC Insert Maintenance
Maintaining the Geotextile Filter is the most important step for achieving the optimal results from your
Basket Style MC Insert filtration system. The Filter can be maintained by a thorough wash and cleaning.
The type of maintenance required is based upon the flow rate through the Basket Style MC Insert and/or
the type of pollutants entering the system.
The metals exchange media have been configured to provide treatment for the identified pollutants in
your stormwater.
3.1.1. Routine Monthly Maintenance— Insert Cleaning
Maintenance Description
The Insert Cleaning and Maintenance consists of cleaning the geotextile insert of all accumulated solids.
Maintenance Timing/Frequency
The maintenance should be conducted when there is either standing water seen inside the geotextile filter
or an accumulation of solids beginning to stack up on the filter surface.
An Insert Filter Maintenance may need to be done as frequently as every 3 —4 weeks depending on the
amount of loading on the Basket Style MC Insert.
Maintenance Steps
The steps in conducting an inspection and cleaning of the Geotextile Filter Insert are:
a. Open up the catch basin — making sure it is safe to do so. If deemed necessary, place warning
barriers and/or safety traffic cones around the catch basin.
b. Look into the top opening of the insert to inspect the media channels at the bottom of the
geotextile insert. Note if there are:
i.Any solids and whether there is an accumulated of solids going up the filter surface.
ii.Any standing water at the bottom of the filter.
c. If the Geotextile Filter has some accumulated solids and/or standing water, carefully lift up the
insert lift straps that holds it in place.
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
d. While insuring that the solids and the standing water will not flow into the barrel, take the insert
out of the catch basin and carry it to the designated wash station.
e. Pour out the standing water,then turned the geotextile filter bag inside out.
f.With standard city water pressure, sluice off the accumulated solids the filter as opposed to driving
the solids into the geotextile filter.
g. Once the geotextile filter cloth appears to be clean, take the spray washer inside the filter and blast
through the cloth to remove any imbedded solids lodged into the filter cloth.
h. Once washed thoroughly, turn the geotextile filter cloth back into working form and test for flow by
adding city water to the inside of the filter. (Note: if water does not flow evenly through the filter,
replace ist Stage Filter.)
L Return to the Basket Style MC Insert and reinstall the geotextile filter into the catch basin.
3.2. Oil Skimmer Maintenance
If included, the oil sorbent floater pillow in the geotextile filter insert should be routinely checked.
y. Material Disposal
Water and sediment removed from the Basket Style MC Insert filter must be disposed of in accordance with
all applicable waste disposal regulations.
The removed spent Basket Style MC Insert can typically be sent to the local landfill. However, it is critical
to follow local regulations for standard guidelines for solid waste disposal.
5. Maintenance Support
If you have any questions about maintenance procedures, contact Gullywasher LLC at(2o6)799-3296•
6. Best Management Practice Requirements
In achieving the benchmarks consistently will require a rigorous implementation of best management practices
(BMPs) including source control, structural and treatment BMPs.Treatment BMPs, such as the Basket Style MC
Insert, are not designed to operate in the absence of other BMPs. Employing source control practices on a regular
basis is essential in extending the life of the Basket Style MC Insert system as heavy pollutant loading can result in a
shorter maintenance cycle than expected. The Basket Style MC Insert system is not designed as an all-in-one treat-
ment device for all types and quantities of stormwater pollution.
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Basket Style MetalCompliant Insert Operation and Maintenance Manual
Your Stormwater Pollution Prevention (or Control) Plan (SWPPP or SWPCP) should address the BMPs appropriate for
your facility. During normal business operation, make sure that all best management practices are deployed and
maintained. When engaging in operations that are atypical of standard business practices, please utilize source
control measures to prevent heavy pollutant loading into the Basket Style MC Insert. The following are a few exam-
ples of typically employed practices.
• Sweeping: Sweep site on a regular basis, such as daily, weekly or bi-monthly, especially in areas
of heavy industrial activities.
• Covering activities: When practical, cover significant materials or industrial operations that are outdoors,
to prevent stormwater contact with potential pollutants.
• Spill control:When a spill occurs, contain and use onsite spill kits to dispose of material.
• Catch basin and stormwater conveyance clean out: When cleaning out catch basins and jetting
stormwater conveyance lines turn off the pump that diverts water to the Basket Style MC Insert
system. This water should not enter the Basket Style MC Insert system.
JETTING YOUR STORMWATER LINES INTO THE BASKET STYLE MC INSERT IS NOTALLOWED
Gullywasher LLC
www.guilywasher.com
© 2015 Gullywasher LLC.
All rights reserved. No part of this publication may be reproduced in any form or by any means without the
prior written permission of Gullywasher LLC.
Trademarks and Disclaimers
The Gullywasher and Upflow BioFilter and associated logos are trademarks of Gullywasher LLC.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the
marks and names or their products.
Gullywasher LLC disclaims any proprietary interest in trademarks and trade names other than its own.
This document is subject to change without notice.
5242 57th Avenue South
Seattle, WA 98118
Telephone 2o6.799.3296
[e-mail]
-10-

GULLYWASHER Analytical Lab Test Data For MetalCompliant Filter Insert Performance
22 January, 201 T 25 April, 2011 26 September, 2011
Metals Inlet Outlet % Removal Inlet Outlet % Removal Inlet Outlet % Removal
;hrominurr 1.6 1.1 30.7% 14.1 1.4 90.1% --- --- ---
Copper 10 3 70.1% 52 7.6 85.3% 28 10.6 62.1%
Lead 1.5 1.5 0.0% 202 16 92.1% 60 12.2 79.6%
Nickel 2.1 0 100.0% 12.5 1.4 88.8% 3.8 0.9 76.3%
Zinc 1 1 812 16.9 97.9% 1 1 897 126 86.0% 367 51.9 85.9%
Winter Spring Fall
Note the amount of incoming lead in
comparison to the amount of zinc in
the Winter analysis. It is thought that
with this amount of incoming lead, the
zinc was being displaced by the stronger
lead attraction to the sodium exchange
media.

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