HomeMy WebLinkAboutNCG030039_Monitoring Report_20211105SHIELD
ENGINEERING
November 2, 2021
Zahid Khan
Regional Engineer, Land Quality Section
Energy, Mineral, and Land Resources
North Carolina Department of Environmental Quality
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, North Carolina 28115
Zahid.Khan@ncdenr.gov
Subject: Tier Three Action Plan, Third Quarter 2021
Daimler Trucks North America, LLC — Cleveland Truck Plant
Certificate of Coverage NCG030039
Dear Mr. Khan,
On behalf of Daimler Trucks North America, LLC (DTNA) — Cleveland Truck Plant, Shield
Engineering, Inc. has prepared and is submitting the attached Tier Three Action for your approval
in accordance with NPDES Industrial Stormwater Permit NCG030000, Part E for Third Quarter,
2021. The cover page of the report contains the required certification by DTNA-Cleveland's
responsible official. If you have any questions regarding this Action Plan, please contact us at
(704) 394-6913 or Colin Buchanan with DTNA-Cleveland at colin.buchanan@daimler.com.
Sincerely,
SHIELD ENGINEERING, INC.
Melinda ndreene
Senior Engineer
Magdaline M. Tzannis
Senior Project Manager
ATTACHMENTS
cc: Colin Buchanan, DTNA-Cleveland
James Moore, NCDEQ Mooresville
Robert L. G PE
• •
4301 Taggart Creek Road www.shieldeneineering.com Telephone 704.394.6913
Charlotte, NC 28208 License No. F-0856
DAIMLER
DAIMLER TRUCKS NORTH AMERICA
Cleveland Truck Plant
11550 Statesville Boulevard
Cleveland, North Carolina
Certificate of Coverage NCG030039
Tier Three Action Plan, Third Quarter 2021
In compliance with General SW Permit NCG030000, Part E-7
Prepared by:
SHIELD
ENGINEERING
4301 Taggart Creek Road
Charlotte, NC 28208
Shield Project No. 1140109-08
November 2, 2021
l certify by my signature below, under penalty of law, that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my inquiry
of the person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fines and imprisonment for knowing violations.
Erik Johnson Date
DTNA — Cleveland
Daimler Trucks North America, LLC - Cleveland Page 1
Tier Three Response Action Plan November 2, 2021
Facility
Daimler Trucks — Cleveland NCG030039
SDO
002
Parameters
Copper, Zinc
Date Prepared
11/02/2021
This Action Plan has been prepared in accordance with Part E-7(b) of General Permit for
benchmark exceedances which have triggered Tier Three Response. Tier Three status for
Copper and Zinc at Ouffall 002 have carried over from the previous General Permit. This Action
Plan was developed to address Copper and Zinc Tier 3 Response at Outfall 002.
ACTION PLAN ELEMENTS
The General Permit, Part E-7(b), requires specific elements be addressed. Each of these
elements are being addressed as follows:
i. Documentation of the Four Benchmark Exceedances
The tables below document the last four benchmark exceedances for Zinc and Copper at Outfall
002 for Daimler Trucks — Cleveland.
Copper benchmark = 0.010 mg/I
Outfall
Month
9/2021
5/2021
1/2021
9/2020
002
0.015
0.011
0.014
0.017
Zinc benchmark = 0.126 mg/I
Outfall
Month
9/2021
5/2021
3/2021
2/2021
002
0.200
0.180
0.130
0.190
H. An Inspection report that covers the industrial activities within the drainage area of the
outfall with the exceedances (including the date of the inspection and the personnel
conducting the inspection)
See attached inspection report. The inspection covered all areas of industrial activity in the
drainage areas that drain Outfall 002. Typical industrial activities that occur in this drainage area
include heavy vehicle movement, storage and parking, partial main building roof, 400 Paint
building & Off Line building roofs, bulk chemical storage, Offline Paint, Dyno, leak testing,
receiving docks, fire pump house, used oil tanks, Central Accumulation Area (hazardous waste),
parts loading and unloading.
The inspection report notes areas of concern observed as having the potential to contribute to
benchmark exceedances. A site map is attached for reference of the drainage area.
Daimler Trucks North America, LLC - Cleveland Page 2
Tier Three Response Action Plan November 2, 2021
iii. An evaluation of standard operating procedures and good housekeeping procedures
Daimler Cleveland has evaluated its standard operating procedures applicable to the potential for
pollutants to reach stormwater as well as its good housekeeping procedures related to industrial
activities in the drainage area for SDO 002. Any recommendations for improvements in these
activities are described in the attached inspection report or in (v) below.
iv. Identification of the source(s) of exceedances
Daimler Trucks - Cleveland has identified sources it believes may be contributing to the
exceedances. The following causes have a high potential to effect Zinc and Copper
concentrations in stormwater discharged from Outfall 002 and contribute to benchmark
exceedances:
Potential Cause of
Location(s)
Potential
Outfall(s)
Benchmark Exceedance
Pollutant
Affected
Motor Oil and Hydraulic
Loading Areas and
Zinc
002
Fluid throughout the Facility
Outdoor Asphalt
Pavement
Cumulative Effect from Tire
Loading Areas and
Zinc
002
Dust and Debris
Outdoor Asphalt
Pavement
Cumulative Effect from
Outdoor Asphalt
Copper
002
Vehicle Brake Pad
Pavement
Deposits
v. Specific actions that will be taken to remedy the identified source(s) with a schedule
for completing those actions
ACTIONS SELECTED FOR IMPLEMENTATION BY SITE
SCHEDULE FOR
COMPLETION
1. Review Preventive Maintenance procedure for
This will be completed
inspecting and cleaning stormwater drains.
internally, by 11 /19/2021.
2. Create, if needed, a visual guidance for rating high
Inspection reports for drains
risk stormwater drain filters/cartridges to assist with
will be reviewed to determine
determination of appropriate replacement frequency
appropriate replacement
of the high -risk stormwater drain filters/cartridges.
frequency of the high -risk
stormwater drain
filters/cartridges.
3. Engage contractor to sweep site (in-house sweeper is
A contractor will be contacted
in need of repair and replacement part is on back
by 11/30/2021 to provide
order).
costs and availability for
4. Implement routine sweeping.
sweeping SDO 002, every 2
weeks.
Sweeping will commence late
November or early December
2021.'
1 The dates provided are target dates and may change due to reasons beyond Daimler's control such as contractor's availability
(sweeper).
Daimler Trucks North America, LLC - Cleveland Page 3
Tier Three Response Action Plan November 2, 2021
iii. An evaluation of standard operating procedures and good housekeeping procedures
Daimler Cleveland has evaluated its standard operating procedures applicable to the potential for
pollutants to reach stormwater as well as its good housekeeping procedures related to industrial
activities in the drainage area for SDO 002. Any recommendations for improvements in these
activities are described in the attached inspection report or in (v) below.
iv. Identification of the source(s) of exceedances
Daimler Trucks - Cleveland has identified sources it believes may be contributing to the
exceedances. The following causes have a high potential to effect Zinc and Copper
concentrations in stormwater discharged from Outfall 002 and contribute to benchmark
exceedances:
Potential Cause of
Location(s)
Potential
Outfall(s)
Benchmark Exceedance
Pollutant
Affected
Motor Oil and Hydraulic
Loading Areas and
Zinc
002
Fluid throughout the Facility
Outdoor Asphalt
Pavement
Cumulative Effect from Tire
Loading Areas and
Zinc
002
Dust and Debris
Outdoor Asphalt
Pavement
Cumulative Effect from
Outdoor Asphalt
Copper
002
Vehicle Brake Pad
Pavement
Deposits
v. Specific actions that will be taken to remedy the identified source(s) with a schedule
for completing those actions
ACTIONS SELECTED FOR IMPLEMENTATION BY SITE
SCHEDULE FOR
COMPLETION
1. Review Preventive Maintenance procedure for
This will be completed
inspecting and cleaning stormwater drains.
internally, by 11/19/2021.
2. Create, if needed, a visual guidance for rating high
Inspection reports for drains
risk stormwater drain filters/cartridges to assist with
will be reviewed to determine
determination of appropriate replacement frequency
appropriate replacement
of the high -risk stormwater drain filters/cartridges.
frequency of the high -risk
stormwater drain
filters/cartridges.
3. Engage contractor to sweep site (in-house sweeper is
A contractor will be contacted
in need of repair and replacement part is on back
by 11 /30/2021 to provide
order).
costs and availability for
4. Implement routine sweeping.
sweeping SDO 002, every 2
weeks.
Sweeping will commence late
November or early December
2021.'
1 The dates provided are target dates and may change due to reasons beyond Daimler's control such as contractor's availability
(sweeper).
Daimler Trucks North America, LLC - Cleveland Page 4
Tier Three Response Action Plan November 2, 2021
vi. A monitoring plan to verify that the Action Plan has addressed the source(s).
Daimler Trucks - Cleveland will attempt to sample SDO 002 at least monthly until three
consecutive samples for Zinc and Copper are below the benchmark value. In the event a sample
cannot be collected during a month, record documentation as to why a sample could not be
collected. Daimler Trucks — Cleveland will continue routine facility inspections to ensure the
effectiveness of the implemented actions and identify any new potential causes or contributors to
the benchmark exceedances.
ATTACHMENTS:
Stormwater Management Inspection (Copper and Zinc, Outfall 002)
Site Map
Stormwater Management Inspection Report (Tier Response)
Facility
DAIMLER TRUCKS — CLEVELAND
Parameter Exceedance
Copper
SDO
002
Date of Sample
9/16/2021
Date Received from Lab
9/30/2021
Date NC DEQ Notified
10/19/2021
Notification Method
Email
Benchmark
0.010 m /I
Lab Result
0.015 m /I
Date/Time of SW Inspection
10/11/2021
Weather during Inspection
Clear, 65"
11:52am —1:00 m
Inspector(s)
C Buchanan Daimler CLE
Areas Inspected
Drainage Area for SDO where industrial activity occurs: See attached map.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS*
High Risk INLET DRAINS
These drains have been identified as high
1. Review PM for inspecting stormwater
impact drains. While the drains currently house
drains and ensure rating system has
(see attached site map)
framed cartridge inserts, the cartridges may
metrics for cartridge replacement.
need more frequent replacement. Tire and brake
2. Evaluate replacement frequency of
dust from movement of vehicles is likely to
each drain insert on an individual basis.
contribute to high metals concentrations in this
3. Replace cartridges as needed.
drainage area.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS
GENERAL HOUSEKEEPING
Asphalt areas need sweeping. In-house
1. Engage contract sweeper and schedule
sweeper needs repair and replacement part is
routine sweeping until in-house
on backorder.
sweeper is repaired.
2. Encourage good housekeeping as a
part of a daily and/or weekly routine.
*Source controls, operational controls or physical improvements
Facility
DAIMLER TRUCKS — CLEVELAND
Parameter Exceedance
Zinc
SDO
002
Date of Sample
9/16/2021
Date Received from Lab
9/30/2021
Date NC DEQ Notified
10/19/2021
Notification Method
Email
Benchmark
0.126 m /I
Lab Result
0.200 m /I
Date/Time of SW Inspection
10/11/2021
Weather during Inspection
Clear, 65°
11:52am —1:00 m
Inspector(s)
C Buchanan Daimler CLE
Areas Inspected
Drainage Area for SDO where industrial activity occurs: See attached map.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS*
High Risk INLET DRAINS
These drains have been identified as high
1. Review PM for inspecting stormwater
impact drains. While the drains currently
drains and ensure rating system has
(see attached site map)
house framed cartridge inserts, the
metrics for cartridge replacement.
cartridges may need more frequent
2. Evaluate replacement frequency of
replacement. Tire and brake dust from
each drain insert on an individual basis.
movement of vehicles is likely to contribute
3. Replace cartridges as needed.
to high metals concentrations in this
drainage area.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS
GENERAL HOUSEKEEPING
Asphalt areas need sweeping. In-house
1. Engage contract sweeper and schedule
sweeper needs repair and replacement part
routine sweeping until in-house
is on backorder.
sweeper is repaired.
2. Encourage good housekeeping as a
part of a daily and/or weekly routine.
*Source controls, operational controls or physical improvements
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SHIEI
ENGINEEF
�C
November 2, 2021
Zahid Khan
Regional Engineer, Land Quality Section
Energy, Mineral, and Land Resources
North Carolina Department of Environmental Quality
Mooresville Regional Office
610 East Center Avenue, Suite 301
Mooresville, North Carolina 28115
Zahid.Khan@ncdenr.gov
Jam es Moo re
Subject: Tier Three Action Plan, Third Quarter 2021
Daimler Trucks North America, LLC — Cleveland Truck Plant
Certificate of Coverage NCG030039
Dear Mr. Khan,
On behalf of Daimler Trucks North America, LLC (DTNA) — Cleveland Truck Plant, Shield
Engineering, Inc, has prepared and is submitting the attached Tier Three Action for your approval
in accordance with NPDES Industrial Stormwater Permit NCG030000, Part E for Third Quarter,
2021. The cover page of the report contains the required certification by DTNA-Cleveland's
responsible official. If you have any questions regarding this Action Plan, please contact us at
(704) 394-6913 or Colin Buchanan with DTNA-Cleveland at colin.buchanan@daimler.com.
Sincerely,
SHIELD ENGINEERING, INC.
Melinda nreene
Senior Engineer
Magdaline M. Tzannis
Senior Project Manager
ATTACHMENTS
cc: Colin Buchanan, DTNA-Cleveland
James Moore, NCDEQ Mooresville
Robert L+GnPE
President/CEO
4301 Taggart Creek Road www.shieldengineering.com Telephone 704.394.6913
Charlotte, NC 28208 License No. F-0856
DAIMLER
DAIMLER TRUCKS NORTH AMERICA
Cleveland Truck Plant
11550 Statesville Boulevard
Cleveland, North Carolina
Certificate of Coverage NCG030039
Tier Three Action Plan, Third Quarter 2021
In compliance with General SW Permit NCG030000, Part E-7
Prepared by:
SHIELD
ENGINEERING
4301 Taggart Creek Road
Charlotte, NC 28208
Shield Project No. 1140109-08
November 2, 2021
I certify by my signature below, under penalty of law, that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my inquiry
of the person or persons who manage the system. or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fines and imprisonment for knowing violations.
Erik Johnson Date
DTNA — Cleveland
Daimler Trucks North America, LLC - Cleveland Page 1
Tier Three Response Action Plan November 2. 2021
Facility
Daimler Trucks —Cleveland NCG030039
SDO
002
Parameters
Copper Zinc
Date Prepared
11/02/2021
INTRODUCTION
This Action Plan has been prepared in accordance with Part E-7(b) of General Permit for
benchmark exceedances which have triggered Tier Three Response. Tier Three status for
Copper and Zinc at Outfall 002 have carried over from the previous General Permit. This Action
Plan was developed to address Copper and Zinc Tier 3 Response at Outfall 002.
ACTION PLAN ELEMENTS
The General Permit, Part E-7(b), requires specific elements be addressed. Each of these
elements are being addressed as follows:
i. Documentation of the Four Benchmark Exceedances
The tables below document the last four benchmark exceedances for Zinc and Copper at Outfall
002 for Daimler Trucks — Cleveland.
Copper benchmark = 0.010 mg/I
Outfall
Month
1 9/2021
5/2021
1/2021
9/2020
002
0.015
0.011
0.014
0.017
Zinc benchmark = 0.126 mg/I
Outfall
Month
9/2021
5/2021
3/2021
2/2021
002
1 0.200
0.180
0.130
0.190
H. An Inspection report that covers the industrial activities within the drainage area of the
outfall with the exceedances (including the date of the inspection and the personnel
conducting the inspection)
See attached inspection report. The inspection covered all areas of industrial activity in the
drainage areas that drain Outfall 002. Typical industrial activities that occur in this drainage area
include heavy vehicle movement, storage and parking, partial main building roof, 400 Paint
building & Off Line building roofs, bulk chemical storage, Offline Paint, Dyno, leak testing,
receiving docks, fire pump house, used oil tanks, Central Accumulation Area (hazardous waste),
parts loading and unloading.
The inspection report notes areas of concern observed as having the potential to contribute to
benchmark exceedances. A site map is attached for reference of the drainage area.
Daimler Trucks North America, LLC - Cleveland Page 2
Tier Three Response Action Plan November 2.2021
iii. An evaluation of standard operating procedures and good housekeeping procedures
Daimler Cleveland has evaluated its standard operating procedures applicable to the potential for
pollutants to reach stormwater as well as its good housekeeping procedures related to industrial
activities in the drainage area for SDO 002. Any recommendations for improvements in these
activities are described in the attached inspection report or in (v) below.
iv. Identification of the source(s) of exceedances
Daimler Trucks - Cleveland has identified sources it believes may be contributing to the
exceedances. The following causes have a high potential to effect Zinc and Copper
concentrations in stormwater discharged from Outfall 002 and contribute to benchmark
exceedances:
Potential Cause of
Location(s)
Potential
Outfall(s)
Benchmark Exceedance
Pollutant
Affected
Motor Oil and Hydraulic
Loading Areas and
Zinc
002
Fluid throughout the Facility
Outdoor Asphalt
Pavement
Cumulative Effect from Tire
Loading Areas and
Zinc
002
Dust and Debris
Outdoor Asphalt
Pavement
Cumulative Effect from
Outdoor Asphalt
Copper
002
Vehicle Brake Pad
Pavement
Deposits
v. Specific actions that will be taken to remedy the identified source(s) with a schedule
for completing those actions
ACTIONS SELECTED FOR IMPLEMENTATION BY SITE
SCHEDULE FOR
COMPLETION
1. Review Preventive Maintenance procedure for
This will be completed
inspecting and cleaning stormwater drains.
internally, by 11/19/2021.
2. Create, if needed, a visual guidance for rating high
Inspection reports for drains
risk stormwater drain filters/cartridges to assist with
will be reviewed to determine
determination of appropriate replacement frequency
appropriate replacement
of the high -risk stormwater drain filters/cartridges.
frequency of the high -risk
stormwater drain
filters/cartridges.
3. Engage contractor to sweep site (in-house sweeper is
A contractor will be contacted
in need of repair and replacement part is on back
by 11 /30/2021 to provide
order).
costs and availability for
4. Implement routine sweeping.
sweeping SDO 002, every 2
weeks.
Sweeping will commence late
November or early December
2021.'
r _ J- — .:J nl,e.n- e/..n fn rnacnna hnunnrt n2imlaec rnntml curt, aS rnntmenes availability
(sweeper).
Daimler Trucks North America, LLC - Cleveland Page 3
Tier Three Response Action Plan November 2.2021
iii. An evaluation of standard operating procedures and good housekeeping procedures
Daimler Cleveland has evaluated its standard operating procedures applicable to the potential for
pollutants to reach stormwater as well as its good housekeeping procedures related to industrial
activities in the drainage area for SDO 002. Any recommendations for improvements in these
activities are described in the attached inspection report or in (v) below.
iv. Identification of the source(s) of exceedances
Daimler Trucks - Cleveland has identified sources it believes may be contributing to the
exceedances. The following causes have a high potential to effect Zinc and Copper
concentrations in stormwater discharged from Outfall 002 and contribute to benchmark
exceedances:
Potential Cause of
Location(s)
Potential
Outfall(s)
Benchmark Exceedance
Pollutant
Affected
Motor Oil and Hydraulic
Loading Areas and
Zinc
002
Fluid throughout the Facility
Outdoor Asphalt
Pavement
Cumulative Effect from Tire
Loading Areas and
Zinc
002
Dust and Debris
Outdoor Asphalt
Pavement
Cumulative Effect from
Outdoor Asphalt
Copper
002
Vehicle Brake Pad
Pavement
Deposits
v. Specific actions that will be taken to remedy the identified source(s) with a schedule
for completing those actions
ACTIONS SELECTED FOR IMPLEMENTATION BY SITE
SCHEDULE FOR
COMPLETION
1. Review Preventive Maintenance procedure for
This will be completed
inspecting and cleaning stormwater drains.
internally, by 11/19/2021.
2. Create, if needed, a visual guidance for rating high
Inspection reports for drains
risk stormwater drain filters/cartridges to assist with
will be reviewed to determine
determination of appropriate replacement frequency
appropriate replacement
of the high -risk stormwater drain filters/cartridges.
frequency of the high -risk
stormwater drain
filters/cartridges.
3. Engage contractor to sweep site (in-house sweeper is
A contractor will be contacted
in need of repair and replacement part is on back
by 11 /30/2021 to provide
order).
costs and availability for
4. Implement routine sweeping.
sweeping SDO 002, every 2
weeks.
Sweeping will commence late
November or early December
2021.1
The dates provided are target dates and may change due to reasons beyond Daimler's control sucn as contractors avanaoany
(sweeper).
Daimler Trucks North America, LLC - Cleveland Page 4
Tier Three Response Action Plan November 2, 2021
vi. A monitoring plan to verify that the Action Plan has addressed the source(s).
Daimler Trucks - Cleveland will attempt to sample SDO 002 at least monthly until three
consecutive samples for Zinc and Copper are below the benchmark value. In the event a sample
cannot be collected during a month, record documentation as to why a sample could not be
collected. Daimler Trucks — Cleveland will continue routine facility inspections to ensure the
effectiveness of the implemented actions and identify any new potential causes or contributors to
the benchmark exceedances.
ATTACHMENTS:
Stormwater Management Inspection (Copper and Zinc, Outfall 002)
Site Map
Stormwater Management Inspection Report (Tier Response)
Facility
DAIMLER TRUCKS — CLEVELAND
Parameter Exceedance
Copper
SDO
002
Date of Sample
9/16/2021
Date Received from Lab
9/30/2021
Date NC DEQ Notified
10/19/2021
Notification Method
Email
Benchmark
0.010 m /I
Lab Result
0.015 mg/1
Date/Time of SW Inspection
10/11/2021
Weather during Inspection
Clear, 650
11:52am —1:00 m
Inspector(s)
C Buchanan Daimler CLE
Areas Inspected
Drainage Area for SDO where industrial
activity occurs: See attached map.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS*
High Risk INLET DRAINS
These drains have been identified as high
1. Review PM for inspecting stormwater
impact drains. While the drains currently house
drains and ensure rating system has
(see attached site map)
framed cartridge inserts, the cartridges may
metrics for cartridge replacement.
need more frequent replacement. Tire and brake
2. Evaluate replacement frequency of
dust from movement of vehicles is likely to
each drain insert on an individual basis.
contribute to high metals concentrations in this
3. Replace cartridges as needed.
drainage area.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS
GENERAL HOUSEKEEPING
Asphalt areas need sweeping. In-house
1. Engage contract sweeper and schedule
sweeper needs repair and replacement part is
routine sweeping until in-house
on backorder.
sweeper is repaired.
2. Encourage good housekeeping as a
part of a daily and/or weekly routine.
"Source controls, operational controls or physical improvements
Facility
DAIMLER TRUCKS — CLEVELAND
Parameter Exceedance
Zinc
SDO
002
Date of Sample
9/16/2021
Date Received from Lab
9/30/2021
Date NC DEQ Notified
10/19/2021
Notification Method
Email
Benchmark
0.126 m /I
Lab Result
0.200 m /I
Date/Time of SW Inspection
10/11 /2021
Weather during Inspection
Clear, 650
11:52am —1:00 m
Inspector(s)
C Buchanan Daimler CLE
Areas Inspected
Drainage Area for SDO where industrial
activity occurs: See attached map.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS*
High Risk INLET DRAINS
These drains have been identified as high
1. Review PM for inspecting stormwater
impact drains. While the drains currently
drains and ensure rating system has
(see attached site map)
house framed cartridge inserts, the
metrics for cartridge replacement.
cartridges may need more frequent
2. Evaluate replacement frequency of
replacement. Tire and brake dust from
each drain insert on an individual basis.
movement of vehicles is likely to contribute
3. Replace cartridges as needed.
to high metals concentrations in this
drainage area.
Areas of Concern
POTENTIAL SOURCE
POTENTIAL IMPROVEMENTS
GENERAL HOUSEKEEPING
Asphalt areas need sweeping. In-house
1. Engage contract sweeper and schedule
sweeper needs repair and replacement part
routine sweeping until in-house
is on backorder.
sweeper is repaired.
2. Encourage good housekeeping as a
part of a daily and/or weekly routine.
*Source controls, operational controls or physical improvements
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