WQ0036676_Compliance Evaluation Inspection_20211007

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
S. DANIEL SMITH
Director
Mr. Trey Lowder, Assist. Operations Manager
Blue Dot Readi-Mix
Post Office Box 23029
Mint Hill, North Carolina 28227
Dear Mr. Lowder:
NORTH CAROLINA
Environmental Quality
October 7, 2021
via Email
Subject: Non -Discharge Permit Inspection Report
Recycle System - Permit #WQ0036676
Blue Dot Readi-Mix — Exchange Street Facility
Mecklenburg County
Mooresville Regional Office (MRO) staff would like to thank you for your time during the September 15th, 2021,
compliance inspection for the referenced permit. The facility and records reviewed appeared to meet program
requirements at the time of inspection; however, the recycle water in the clear water basin appeared cloudy and
may indicate the need to assess solids throughout the system and/or increase filter press operation.
In addition, please review and ensure current maintenance meets the minimum requirements stated in "The
Operations and Maintenance Plan" submitted with the original application. As it states under Section 2. Required
Maintenance of the System: Residuals in the manual washout pit and the settling chamber shall be removed
when the average depth is 1'.
The following items of interest were also discussed:
An automated truck wash unit was installed and is anticipated to reduce both water use and vehicle wash
time from the former manual process.
The original auger delivery system to the aggregate reclaimer, proved to be problematic, would lock -up and
was not utilized for a couple years. That unit was removed and replaced by maintenance staff with a
simplistic trough/sluice type conveyance. MRO staff discussed with Nathaniel Thornburg (Non -Discharge
Permitting Supervisor at our Central Office in Raleigh), on October 6th, 2021, who agreed this sounded as
though it was a maintenance repair and not a modification.
The inspection report is attached, should you have any questions please contact Maria Schutte by phone at
[phone] or email at maria.schutte(c�ncdenr.gov.
NCD_E
Dcyartmene of NIvlmamrnlal Pus INsafek"
R CAR a NA
Sincerely,
DocuSigned by:
,44441w H P;.44.4
�F161FB69A2D84A3...
Andrew H. Pitner, P.G., Assistant Regional Supervisor
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
North Carolina Department of Environmental Quality j Division of Water Resources
Mooresville Regional Office 1610 East Center Avenue, Suite 301 I Mooresville, North Carolina 28115
704.663.1699

Attachment(s): WQ0036676 Inspection Report
CC: Paul Cochrane, President, Exchange Street, LLC (Email)
Ronnie Vickerstaff, Plant Manager — Exchange Street Facility (Email)

Compliance Inspection Report
Permit: WO0036676 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
Contact Person: Paul Cochrane
Charlotte NC 28208
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: 09/15/2021
Entry Time 09:58AM Exit Time: 11:05AM
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:
II Miscellaneous Questions
▪ Record Keeping
▪ End Use -Reuse
(See attachment summary)
▪ Treatment Treatment Filters
▪ Treatment Sludge Storage/Treatment Storage
Page 1 of 5

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 09/15/2021 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Inspection Summary:
Mooresville Regional Office (MRO) staff would like to thank Mr. Trey lowder for his time during the September 15th, 2021
compliance inspection for the referenced permit. The facility and records reviewed appeared to meet program requirements
at the time of inspection; however, the recycle water in the clear water basin appeared cloudy and may indicate the need to
assess solids throughout the system and/or increase filter press operation.
In addition, please review and ensure current maintenance meets the minimum requirements stated in "The Operations and
Maintenance Plan" submitted with the original application. As it states under Section 2. Required Maintenance of the
System: Residuals in the manual washout pit and the settling chamber shall be removed when the average depth is 1'.
The following items of interest were also discussed:
An automated truck wash unit was installed and is anticipated to reduce both water use and vehicle wash time from the
former manual process.
The original auger delivery system to the aggregate reclaimer, proved to be problematic, would lock -up and was not utilized
for a couple years. That unit was removed and replaced by maintenance staff with a simplistic trough/sluice type
conveyance. MRO staff discussed with Nathaniel Thornburg (Non -Discharge Permitting Supervisor at our Central Office in
Raleigh), on October 6th, 2021, who agreed this sounded as though it was a maintenance repair and not a modification.
Page 2 of 5

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 09/15/2021 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
Type Yes No NA NE
Reuse (Quality) ❑
Infiltration System ❑
Single Family Spray, LR ❑
Lagoon Spray, LR ❑
Activated Sludge Spray, HR ❑
Activated Sludge Spray, LR ❑
Activated Sludge Drip, LR ❑
Single Family Drip ❑
Recycle/Reuse
Treatment
Are Treatment facilities consistent with those outlined in the current permit?
Do all treatment units appear to be operational? (if no, note below.)
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: See comments in summary section about the removal and replacement of the auger for the
aggregate reclaimer.
Treatment Filters
Is the filter media present?
Is the filter media the correct size and type?
Is the air scour operational?
Is the scouring acceptable?
Is the clear well free of excessive solids?
Is the mud well free of excessive solids and filter media?
Does backwashing frequency appear adequate?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
❑ ❑ • ❑
• ❑ ❑ ❑
❑ ❑ • ❑
❑ ❑ • ❑
Comment: This is an accordion bag filtration unit to clarify water for reuse in concrete production. The
water in the clear water basin (clear well) appeared cloudy. See solids management comments
in the Cover letter and Summary Section.
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: The aggregate separator, bag -filtration and basin clean -out solids are all maintained on -site
until repurposed (internally or hauled). Todd Oehler backhoe and landscaping is used for
routine (approximately quarterly) hauling.
Record Keeping
Is a copy of current permit available?
Are monitoring reports present: NDMR?
Yes No NA NE
• ❑ ❑ ❑
❑ ❑ • ❑
Page 3 of 5

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 09/15/2021 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
NDAR?
Are flow rates less than of permitted flow?
Are flow rates less than of permitted flow?
Are application rates adhered to?
Is GW monitoring being conducted, if required (GW-59s submitted)?
Are all samples analyzed for all required parameters?
Are there any 2L GW quality violations?
Is GW-59A certification form completed for facility?
Is effluent sampled for same parameters as GW?
Do effluent concentrations exceed GW standards?
Are annual soil reports available?
# Are PAN records required?
# Did last soil report indicate a need for lime?
If so, has it been applied?
Are operational logs present?
Are lab sheets available for review?
Do lab sheets support data reported on NDMR?
Do lab sheets support data reported on GW-59s?
Are Operational and Maintenance records present?
Were Operational and Maintenance records complete?
Has permittee been free of public complaints in last 12 months?
Is a copy of the SOC readily available?
No treatment units bypassed since last inspection?
❑ ❑ • ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
• ❑ ❑ ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
❑ ❑ • ❑
Comment: Operation Togs are maintained on computer and paper copies of requested items were brought
for review. Maintenance repair records are kept in a separate data base and were not
reviewed during this visit.
End Use -Reuse
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?
Yes No NA NE
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
Page 4 of 5

Permit: WQ0036676 Owner - Facility: Exchange Street LLC
Inspection Date: 09/15/2021 Inspection Type : Compliance Evaluation
Reason for Visit: Routine
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?
Is the acreage in the permit being utilized?
Is the application equipment acceptable?
Is the application area free of limiting slopes?
How close is the closest water supply well?
Are any supply wells within the CB?
Are any supply wells within 250' of the CB?
Is municipal water available in the area?
Are GW monitoring wells required?
Are GW monitoring wells located properly w/ respect to RB and CB?
Are GW monitoring wells properly constructed, including screened interval?
Comment: This is a truck wash recycle system at a concrete facility.
make-up water in certain concrete mixtures.
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
❑ ❑ • ❑
The final filtered water is reused as
Page 5 of 5