WQ0036676_Compliance Evaluation Inspection_20230725

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
July 25, 2023
Mr. Seth Girouard, Sales Coordinator via Email
Blue Dot Readi-Mix
Post Office Box 23029
11330 Bain School Road
Mint Hill, North Carolina 28227
Subject: Non -Discharge Permit Inspection Report
Recycle System - Permit #WQ0036676
Blue Dot Readi-Mix — Exchange Street Facility
Mecklenburg County
Dear Mr. Girouard:
Mooresville Regional Office (MRO) staff would like to thank the Blue Dot staff and you for your time during the
May 151, 2023, compliance inspection for the referenced permit. The facility and records reviewed appeared to
meet program requirements at the time of inspection; however, a soap -like, surface foam at the final water
basin prevented visual assessment of water clarity in that basin.
Per onsite conversation and follow-up communication, a new bag filter system was installed with covered
housing, you confirmed approximate daily truck wash volume to the system (May 4th, 2023, email) and removal
of solids from the system basins (phone) on May 15th, 2023.
Since the inspection, this permit renewed on June 16th, 2023. MRO staff also received the following
information from our Central Office Staff:
If the facility can document that they meet the requirements of 15A NCAC 02U .0113(a)(14), then they
can submit a recission request and we will rescind the permit.
15A NCAC 02U .0113(a)(14) states that:
(a) The following utilizations of reclaimed water and closed -loop recycle activities
shall be deemed to be permitted pursuant to G. S. 143-215. 1 (b), and it is not
necessary for the Division to issue individual permits or coverage under a
general permit for construction or operation of the following utilization systems
provided the system does not result in any violations of surface water or
groundwater standards, there is no unpermitted direct discharge to surface
waters, and all criteria required for the specific system are met.
a. (14) Recycling of rinse water at concrete mixing facilities for concrete
mix removal from equipment provided the wastewater is contained
within concrete structures, there is sufficient storage capacity to contain
the runoff from a 24-hour, 25-year storm event plus one foot freeboard
and the facility develops and maintains a spill control plan in the event
of a wastewater release. The facility shall notify the appropriate Division
regional office in writing noting the owner, location, and that the design
complies with the above criteria;
North Carolina Department of Environmental Quality I Division of Water Resources
D E Q Mooresville Regional Office 1 601 East Center Avenue, Suite 301 1 Mooresville, NC 28115
NORTH CAROLINA 704.663.1699

You may opt to assess your current recycle permits (WQ0036676 and WQ0036877) and, should you choose
to request permit rescissions, submit the written request(s) with required information to:
Nathaniel.Thornburg(@deg.nc.gov and copy MRO staff at the email address below.
Or, you may continue to operate under and retain your existing non -discharge permits.
The inspection report is attached and should be self-explanatory; however, please contact Maria Schutte by
email or phone (maria.schutte(a-)deg.nc.gov or 704-235-2184) with any questions.
Sincerely,
DocuSigned by:
F161FB69A2D84A3...
Andrew H. Pitner, P.G., Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
Attachment: WQ0036676 Inspection Report
CC: Paul Cochrane, President, Exchange Street, LLC (Email)
Ronnie Vickerstaff, Plant Manager — Exchange Street Facility (Email)
North Carolina Department of Environmental Quality I Division of Water Resources
RE;
QMooresville Regional Office 1 601 East Center Avenue, Suite 301 1 Mooresville, NC 28115
NORTHCAaoutia 704.663.1699
n_o .m mn..iitv

Compliance Inspection Report
Permit: WQ0036676 Effective: 11/01/18 Expiration: 10/31/23 Owner: Exchange Street LLC
SOC: Effective: Expiration: Facility: Blue Dot Readi-Mix - Exchange Street CLRS
County: Mecklenburg 1022 Exchange St
Region: Mooresville
Charlotte NC 28208
Contact Person: Paul Cochrane Title: President Phone: [phone]
Directions to Facility:
Rt off of salisbury hwy nc hwy 70 onto intercraft dr then a distance of 1025 ft and sight will be on rt.
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
NCG140430 Exchange Street LLC - Blue Dot Readi-Mix - Exchange Street CLRS
Inspection Date: 05/01/2023 Entry Time 10:02AM Exit Time: 11:14AM
Primary Inspector: Maria Schutte Phone: [phone]
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Closed -Loop Recycle
Facility Status: Compliant ❑ Not Compliant
Question Areas:
Treatment Flow Measurement -Effluent Treatment Flow Measurement -Influent Miscellaneous Questions
Treatment Flow Measurement -Water Treatment Treatment Filters
Use Records
Record Keeping Treatment Sludge Storage/Treatment Treatment Flow Measurement
Storage End Use -Reuse
(See attachment summary)
Page 1 of 6

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 05/01/2023 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Mooresville Regional Office (MRO) staff would like to thank the Blue Dot staff and you for your time during the May 1 st,
2023, compliance inspection for the referenced permit. The facility and records reviewed appeared to meet program
requirements at the time of inspection; however, a soap -like, surface foam at the final water basin prevented visual
assessment of water clarity in that basin.
Per onsite conversation and follow-up communication, a new bag filter system was installed with covered housing, you
confirmed approximate daily truck wash volume to the system (May 4th, 2023, email) and removal of solids from the system
basins (phone) on May 15th, 2023.
Since the inspection, this permit renewed on June 16th, 2023. MRO staff also received the following information from our
Central Office Staff:
If the facility can document that they meet the requirements of 15A NCAC 02U .0113(a)(14), then they can submit a
recission request and we will rescind the permit.
15A NCAC 02U .0113(a)(14) states that:
(a) The following utilizations of reclaimed water and closed -loop recycle activities shall be deemed to be permitted pursuant
to G.S. 143-215.1(b), and it is not necessary for the Division to issue individual permits or coverage under a general permit
for construction or operation of the following utilization systems provided the system does not result in any violations of
surface water or groundwater standards, there is no unpermitted direct discharge to surface waters, and all criteria required
for the specific system are met:
a.(14) Recycling of rinse water at concrete mixing facilities for concrete mix removal from equipment provided the
wastewater is contained within concrete structures, there is sufficient storage capacity to contain the runoff from a 24-hour,
25-year storm event plus one foot freeboard and the facility develops and maintains a spill control plan in the event of a
wastewater release. The facility shall notify the appropriate Division regional office in writing noting the owner, location, and
that the design complies with the above criteria;
You may opt to assess your current recycle permits (WQ0036676 and WQ0036877) and, should you choose to request
permit rescissions, submit the written request(s) with required information to: [e-mail] and copy
MRO staff at the email address below.
Or, you may continue to operate under and retain your existing non -discharge permits.
The inspection report is attached and should be self-explanatory; however, please contact Maria Schutte by email or phone
([e-mail] or 704-235-2184) with any questions.
Page 2 of 6

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 05/01/2023 Inspection Type: Compliance Evaluation
Reason for Visit: Routine
Type
Yes No NA NE
Reuse (Quality)
❑
Infiltration System
❑
Lagoon Spray, LR
❑
Single Family Spray, LR
❑
Activated Sludge Spray, LR
❑
Activated Sludge Spray, HR
❑
Activated Sludge Drip, LR
❑
Single Family Drip
❑
Recycle/Reuse
Treatment
Yes No NA NE
Are Treatment facilities consistent with those outlined in the current permit? 0 ❑ ❑ ❑
Do all treatment units appear to be operational? (if no, note below.) 0 ❑ ❑ ❑
Comment: This is a truck -wash recycled water and solids system at a concrete mixing facility. Treatment
consists of settling basins and a final bag filtration system, then reuse water is pumped to the
concrete mixing process as needed, and solids periodically removed to dry and hauled by a
third party for reuse or proper disposal.
Treatment Flow Measurement -Influent
Is flowmeter calibrated annually?
Is flowmeter operating properly?
Does flowmeter monitor continuously?
Does flowmeter record flow?
Yes No NA NE
❑❑■❑
❑❑■❑
❑❑■❑
❑❑■❑
Does flowmeter appear to monitor accurately? ❑ ❑ 0 ❑
Comment: Dailv flow is approximated by number of truck washes throuqh an automated truck wash
system. Per communication with Central Office (CO) permitting staff, this permit does not have
a flow limit, rather the freeboard level (1-foot) must be maintained throughout the recycle
system. At MRO request, GPD was removed from the permit description language so as not to
be misleading.
Treatment Flow Measurement -Water Use Records
Is water use metered?
Are the daily average values properly calculated?
Comment: Re -use water removed for each new concrete mix is tracked by their computer system.
Treatment Flow Measurement -Effluent
Is flowmeter calibrated annually?
Is flowmeter operating properly?
Does flowmeter monitor continuously?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
❑❑■❑
❑❑■❑
❑❑■❑
Page 3 of 6

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 05/01/2023 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Does flowmeter record flow?
Does flowmeter appear to monitor accurately?
❑❑■❑
❑❑■❑
Comment: This is a non -discharge, recycle permit. Water is filtered for reuse in the concrete mix process.
There is no effluent released from the system.
Treatment Filters
Yes No NA NE
Is the filter media present?
0
❑ ❑ ❑
Is the filter media the correct size and type?
0
❑ ❑ ❑
Is the air scour operational?
❑
❑ 0 ❑
Is the scouring acceptable?
❑
❑ 0 ❑
Is the clear well free of excessive solids?
❑
❑ ❑
Is the mud well free of excessive solids and filter media?
❑
❑ 0 ❑
Does backwashing frequency appear adequate?
❑
❑ 0 ❑
Comment: This is not a wastewater treatment plant process. Most questions are not applicable. This is a
concrete mix facility's; truck wash recycle system to capture water and solids for reuse. An
accordion type, bag unit is used to remove fines after the settling process. Heavy solids could
be removed more frequently to improve settling and clarity of final reuse water. Water is
reused in certain concrete mixes per their internal requirements. Solids are hauled for
distribution or proper disposal by a third party. More frequent hauling could improve the
overall process. The final basin — reuse water — clarity could not be adequately assessed due
to soap -like, floating foam; however, that water was being utilized, so must have met their
internal standards.
Treatment Sludge Storage/Treatment
Is the aeration operational?
Is the aeration pattern even?
If required, are Sanitary "Ts" present in tankage?
Yes No NA NE
❑❑■❑
❑❑■❑
❑❑■❑
Comment: This is not a typical wastewater treatment plant process. This is a rinsed concrete recvclin
system. Filtered reuse water is stored until utilized in wet concrete mixes. Settled solids are
removed and stored onsite to dry, then periodically hauled for appropriate use or disposal by a
third party. The pressed solids from the filter bag are also removed for appropriate reuse /
disposal.
Record Keeping Yes No NA NE
Is a copy of current permit available? 0 ❑ ❑ ❑
Are monitoring reports present: NDMR?
❑
❑ 0 ❑
NDAR?
❑
❑ 0❑
Are flow rates less than of permitted flow?
❑
❑ 0❑
Are flow rates less than of permitted flow?
❑
❑ 0❑
Are application rates adhered to?
❑
❑ 0❑
Is GW monitoring being conducted, if required (GW-59s submitted)?
❑
❑ 0❑
Are all samples analyzed for all required parameters?
❑
❑ 0❑
Are there any 2L GW quality violations?
❑
❑ 0❑
Page 4 of 6

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 05/01/2023 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Is GW-59A certification form completed for facility?
❑
❑ 0 ❑
Is effluent sampled for same parameters as GW?
❑
❑ 0 ❑
Do effluent concentrations exceed GW standards?
❑
❑ 0 ❑
Are annual soil reports available?
❑
❑ 0 ❑
# Are PAN records required?
❑
❑ 0 ❑
# Did last soil report indicate a need for lime?
❑
❑ 0 ❑
If so, has it been applied?
❑
❑ 0 ❑
Are operational logs present?
0
❑ ❑ ❑
Are lab sheets available for review?
❑
❑ 0 ❑
Do lab sheets support data reported on NDMR?
❑
❑ 0 ❑
Do lab sheets support data reported on GW-59s?
❑
❑ 0 ❑
Are Operational and Maintenance records present?
0
❑ ❑ ❑
Were Operational and Maintenance records complete?
0
❑ ❑ ❑
Has permittee been free of public complaints in last 12 months?
0
❑ ❑ ❑
Is a copy of the SOC readily available?
❑
❑ 0 ❑
No treatment units bypassed since last inspection?
0
❑ ❑ ❑
Comment: Per communication with / clarification from CO staff, there is no flow limit,
but containment with
1-foot of freeboard, water level, is required. GW monitoring is currently not required.
End Use -Reuse
Yes No NA NE
Is the acreage in the permit being utilized?
❑
❑ ❑
Does the acreage specified in the permit correspond to the measured acreage at the site?
❑
❑ ❑
Are all essential units provided in duplicate?
❑
❑ ❑
Is an automatically activated standby power source available?
❑
❑ ❑
Is the equalization capacity adequate?
❑
❑ ❑
Is aerated flow equalization present?
❑
❑ ❑
Has the turbidity meter been calibrated in the last 12 months?
❑
❑ ❑
Does the turbidity meter have recording capabilities?
❑
❑ ❑
Is all flow diverted at the appropriate times?
❑
❑ ❑
Is all upset wastewater diverted from reuse storage unit?
❑
❑ ❑
Is all upset wastewater treated, retreated, or disposed of acceptably?
❑
❑ ❑
Is upset wastewater treated prior to discharge to irrigation storage?
❑
❑ ❑
Is public access restricted from irrigation area during active site use?
❑
❑ ❑
If golf course, is a sign posted in plain sight on the club house?
❑
❑ ❑
Is the cover crop acceptable?
❑
❑ ❑
Are buffers adequate?
❑
❑ ❑
Is the site free of ponding/runoff?
❑
❑ ❑
Page 5 of 6

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 05/01/2023 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Is the acreage in the permit being utilized?
❑
❑ 0 ❑
Is the application equipment acceptable?
❑
❑ 0 ❑
Is the application area free of limiting slopes?
❑
❑ 0 ❑
How close is the closest water supply well?
❑
❑ 0 ❑
Are any supply wells within the CB?
❑
❑ 0 ❑
Are any supply wells within 250' of the CB?
❑
❑ 0 ❑
Is municipal water available in the area?
❑
❑ 0 ❑
Are GW monitoring wells required?
❑
❑ 0 ❑
Are GW monitoring wells located properly w/ respect to RB and CB?
❑
❑ 0 ❑
Are GW monitoring wells properly constructed, including screened interval?
❑
❑ 0 ❑
Comment: Questions are NA - see Recycle System description and comments in other sections.
See
highlighted items in Cover Letter and Summary Section, including potential permittee
assessment for rescission request.
Page 6 of 6