WQ0036676_Compliance Evaluation Inspection_20170522

Water Resources
Environmental Quality
Mr. Glen De Lozier, QC Manager
Blue Dot Readi-Mix
Post Office Box 23029
Mint Hill, North Carolina 28227
Dear Mr. De Lozier:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
May 22, 2017
via email
Subject: Non -Discharge Permit Inspection
Recycle System - Permit #WQ0036676
Blue Dot Readi-Mix — Exchange Street Facility
Mecklenburg County
Enclosed you will find the report for the compliance inspection conducted on May 9t1, 2017 at
the referenced facility. I would like to thank you and the Exchange Street staff for your time
during the site visit.
The bulk of the Recycle system appeared to be operating in accordance with the permit, at the
time of inspection. The aggregate reclaimer was damaged and awaiting repair. An on -site
inspection log has been started. Please note the following items to improve record keeping
and maintain overall compliance.
• Per our conversation, you were to email me a copy (partial) of the recycle system
maintenance and hauling records of residuals removed, since the information is
maintained off -site in a separate data base.
• Add to the facility log the number of trucks washed per day. (The design engineer
used this information in the original application to determine the flow (gpd) limit.)
• The permit expiration date is 10/31/2018. Per permit condition 1.3., a renewal
application is due 6 months prior to expiration, by April of 2018. The application
may be located on the DEQ website at:
https://deq. nc.gov/about/divisions/water-resources/water-resources-permits/wastewater-
branch/non-discharge-permitting-unit/application. Scroll to the Closed -Loop Recycle
Systems section and select the Non -Discharge System Renewal form (NDSR).
The report should be self-explanatory; however, should you have any questions, feel free to
call me at 704-235-2184 or contact me via email at maria.schuttencdenr.qov.
Sincerely,
Maria Schutte, Environmental Specialist
Mooresville Regional Office
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
State of North Carolina l Environmental Quality Water Resources Water Quality Regional Operations
Mooresville Regional Office 610 East Center Avenue, Suite 301 1 Mooresville, North Carolina 28115
704 663 1699

Enclosure(s): Inspection Report May 2017
CC: Paul Cochrane, President, Exchange Street, LLC, POB 23029, Charlotte, 28227 (email)
Ronnie Vickerstaff, Plant Manager — Exchange Street Facility (email)

State of North Carolina Department of Environmental Quality
Division of Water Resources
Roy Cooper, Governor
Michael S. Regan, Secretary
S. Jay Zimmerman, Director
NON -DISCHARGE COMPLIANCE INSPECTION
Recycle/Reuse/Reclamation System
GENERAL INFORMATION
Owner: Exchange Street, LLC County: Mecklenburg
Permit #: WQ0036676 (Closed -Loop Recycle) Project Name: Blue Dot Readi-Mix — Exchange Street
Issuance Date: 11/20/2013 Expiration Date: 10/31/2018
Permittee: Paul Cochrane, President Phone: [phone] email: [e-mail]
Additional Contact: Glen De Lozier, QC Manager Phone: [phone] Cell: 704-201-1840
email: [e-mail]
Facility Contact: Ronnie Vickerstaff, Plant Manager Phone: [phone] Cell: 704-620-3988
Email: [e-mail]
Reason for Inspection
X ROUTINE COMPLAINT FOLLOW-UP OTHER
Inspection Date(s): May 9, 2017
Inspection Summary: (additional comments may be included on attached pages)
The basin(s)/Recycle system appeared well maintained, at the time of inspection. The aggregate reclaimer was
down for repair, due to overloading of wet concrete into the hopper. A daily facility logbook has been
established since the previous technical assistance inspection.
Please note:
• Items mentioned in the cover letter to maintain program compliance.
• The MRO should be informed of any changes to the contact information noted above.
Is a follow-up inspection necessary? yes, X no
Inspector Name/Title: Maria Schutte, Environmental Specialist
Telephone No.: 704-663-1699 Fax No. 704-663-6040
Date of Inspection: 05/09/2017

Non -Discharge Permit Inspection Page 2
Permit #WQ0036676 Blue Dot Readi-Mix-Exchange Street — Mecklenburg County
Treatment
Y Are treatment facilities consistent with those outlined in the current permit.
Y Do all treatment units appear to be operational? If no, note below. The aggregate reclaimer was down
for repair, but the Recycled water system appeared to be functioning adequately.
Concrete Slurry Settling Chambers
(check any/all that apply)
Y Influent structure (free of obstructions)
N Baffles/curtains (in need of repair)
Y Freeboard maintained; System design is for over flow to next tanks. Freeboard maintenance should not
be an issue.
N Evidence of overflow
Y Unusual color (very black, textile colors); Slurry is color of the concrete washed into the system.
N Foam (are antifoam agents used)
N Excessive solids buildup (from bottom); The tank bottom is not visible through the slurry; however,
solids from the settling chambers are removed, dried and stored until hauled. Heavy material is removed with
manually operated equipment until the aggregate reclaimer is repaired. The slurry Ones) is processed through
the filter bag.
Y Effluent structure (free of obstructions, easily accessible)
Comment: See Residuals section.
Recycle (Clear Water) Chamber
(check any/all that apply)
Y Influent structure
NA Baffles/curtains (in need of repair)
Y Freeboard maintained
N Evidence of overflow
N Unusual color
N Foam
N Excessive solids build-up
Y Effluent structure (free of obstructions, easily accessible)
Residuals
storage/treatment: There are two concrete residuals generation points in the system. The first is after the
"dirty" water settling chambers by the aggregate reclaimer (or manual removal) and the second is the filter
press. Concrete residuals are periodically hauled for reuse. Per conversation with Mr. De Lozier, he will email
maintenance and hauling records since they are maintained at the Mint Hill office.
Recordkeeping
N Is permit available upon request? Unable to locate. MRO provided a copy, which was placed with
the Stormwater permit.
Y Are operational logs present? Y Complete?
NE Is the operation and maintenance manual present? Complete? There is a separate maintenance
data base.
N Has DWR received any complaints regarding the facility in the last 12 months?
Other noted conditions
The facility manager, Mr. Vickerstaff, started an inspection log as discussed during the 2016 inspection.
The MRO also suggested recording the # of trucks washed per day (to approximate flow into the system as
determined by the engineer at design), which Mr. DeLozier was to discuss with additional
management/contractors.