NCG140001_COMPLETE FILE - HISTORICAL_20150828

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
/v u& l L/b 0
DOC TYPE
HISTORICAL FILE
❑ MONITORING REPORTS
DOC DATE
❑ � 1)) 5 D b C)
YYYYM M D D

C> DUNCKLEE
& DUNHAM
August 28, 2015
ENVIRONMENFAL GEOLOGISTS & ENGINEERS
511 KEISLER DRIVE - SUITE 102
CARY, NOR'NICAROLINA 27518
OFFICE: [phone]
W W W DUNCKLEEDUNHAM COM
Mr. Cheng Zhang
Environmental Senior Specialist
Division of Water Resources
North Carolina Department of Environment and Natural Resources
3800 Barrett Drive
Raleigh, North Carolina 27609
AUS 2 8 2015 yF
NC DENR Raleigh Regional offlca-
Reference: Response to NPDES Stormwater Compliance Inspection
Thomas Concrete of North Carolina — Raleigh Batch Plant
Raleigh, Wake County, North Carolina
COC Number NCG 140001
Dear Mr. Zhang:
Duncklee & Dunham, P.C. (Duncklee & Dunham), on behalf of Thomas Concrete of North Carolina
(Thomas Concrete), submits this response to inspection comments generated by the Department of
Environment and Natural Resources (DENR), Raleigh Regional Office during an inspection of their
facility at 1131 North West Street in Raleigh, Wake County, North Carolina. The facility is currently
operating under NDPES Permit General Permit Number NCG140000, Certificate of Coverage Number
NCG140001. This letter is provided in response to the facility inspection conducted by NC DENR on
May 8, 2015 and their subsequent letter dated June 5, 2015 and received by Thomas Concrete on June 29,
2015. This response letter addresses the inspection comments noted in the letter with a description of
corrective measures taken by the facility following the inspection.
1) The facility has developed a stormwater pollution prevention plan (SPPP). A review of the plan
indicated that included most components required by the general permit. The following
deficiencies were noted:
a) The retention pond holding truck washing wastewater for recycling was not depicted on
the site map;
b) Employee training was not conducted and documented in 2013,
c') The plan was not reviewed or updated annually as required. Plan updates in 2008 and
2014 were documented.
Response 1 a) The SWPPP has been amended to include a corrected map depicting the retention pond.
b) Documentation of employee training for the SWPPP for 2013 could not be located by
Duncklee & Dunham and Thomas Concrete. Thomas Concrete provided SWPPP
Training for 2014; it is documented in the 2014 update of the SWPPP. Previous training
MAILING ADDRESS - POST OFFICE BOX 639 — CARY, NORTH CAROLINA 27512
NORTH CAROLINA BOARD OF EXAMINERS FOR ENGINEERS AND SURVEYORS LICENSE C-3559
NORTH CAROLINA BOARD FOR LICENSING OF GEOLOGISTS LICENSE C-261
NC DENR REGISTERED ENVIRONMENTAL. CONSULTANT NUMBER 00061

Response to NPDES Stormwater Compliance Inspection
Thomas Concrete of North Carolina, Inc.
Raleigh, North Carolina
August 28, 2015
Page 2 of 4
records from 2008-2012 are included in the 2008 SWPPP update. In the future, Thomas
Concrete will complete annual stormwater training and document the training in the
SPPP appendix.
c) Thomas Concrete will review and update the SWPPP annually, at a minimum, or at any
time that facility modifications) are implemented which could impact stormwater runoff.
2) Qualitative and analytical monitoring has been conducted as required by the permit at outfolls
that were active. It was noted that the facility had difficulty to meet the bench mark values for TSS
and pH in the past years, and is currently in Tier 2 monitoring. All stormwater flows eastward
onto the curb of West Street and is collected in a curb inlet, flows through a culvert, and
discharges into Pigeon House Creek A detention pit at the front of the facility only catches a
portion of runoff. It is evident that the main cause for the bench mark exceedances is lack of
treatment of the stormwater runoff. Other contributing factors might include the thick layer of
dirt/dust in the operations area (due to lack of ground cover and inadequate housekeeping), and
possible wastewater outflow from the truck washing area (a temporary sand berm was noticed at
the east side of the area). The facility must identify pollution sources that cause these
exceedances, evaluate alternatives to current practices (which do not appear to be adequate),
and take actions to reduceleliminate pollution sources and provide adequate treatment to
stormwater runoff.
Response 2 Since the inspection, Thomas Concrete has implemented several actions to identify and
address the deficiencies in the quality of stormwater runoff at this facility. Among these actions was an
evaluation of existing site conditions to identify the potential contributing sources of high TSS and pH
levels in the stormwater discharge. Based on this evaluation, the facility identified two significant
sources of TSS and high pH and implemented the following actions to minimize the impact of these
sources:
1) Pollution Source Due to Concrete Residual: The primary source of the TSS and pH exceedances
is related to the presence of fine residual particles of concrete (calcium oxide) that accumulate in
the wastewater -storage pits and originate from the adjacent gravel -surfaced yard area around the
concrete -batch -mix area. These residuals are generated when small volumes of unused concrete
is brought back to the facility in the trucks and the concrete truck drums are washed out into the
pits. Alkaline residuals in the washdown water mix with stormwater runoff from the
truck/concrete process areas and the result is runoff with high pH. The facility previously
employed housekeeping practices in the paved areas and implemented off -site disposal of waste
concrete solids from the pits, but these methods have proven to be insufficient in reducing the
TSS and pH exceedances in stormwater discharge from the site. In response to this discovery,
Thomas Concrete increased the frequency of removal of solid waste from the pits to reduce the
volume of solids stored in the waste pit area. Addionally, the process of returning residual
concrete to the batch facility has been discontinued. This process change has resulted in an
increase in the storage capacity of the wastewater pit area (by reducing the solids volume) and has
allowed for additional housekeeping of the concrete process and truck -washing areas to be
conducted.
DUNCKLEE & DUNHAM, P.C.

Response to NPI)ES Stormwater Compliance Inspection
Thomas Concrete of North Carolina, Inc.
Raleigh, North Carolina
August 28, 2015
Page 3 o f 4
2) Pollution Source Due to Aggregate Materials Storage: A second source of TSS in stormwater
runoff is related to the presence of fine particles of aggregate and dust in the materials -storage
area. Thomas Concrete identified the current, open-air configuration of the aggregate -storage area
and the site -drainage pattern from this area as a possible contributing factor in the TSS
exceedances at the facility. The concrete structures separating the raw -materials storage
compartments are oriented in a west -to -east, parallel pattern perpendicular to the natural pattern
of site drainage. During rain events, the surface -drainage pattern in the area around the
aggregate -materials storage promotes discharge of stormwater runoff that contains aggregate
materials into pathways of frequent truck traffic, which has distributed the fine particles
throughout the processing areas. In response to this discovery, Thomas Concrete spread large -
diameter gravel over the operations area of the facility to reduce the airborne migration of fine
particles and dust, and to reduce the velocity of stormwater runoff through the on -site drainage
area. Additionally, the housekeeping and maintenance of the raw -material storage area has been
increased with the addition of new staff to support the increased housekeeping activities.
3) Recent Sampling Results: Duneklee & Dunham completed site visits to the facility during
representative rain events on June 25, July 13, and July 23 to monitor stormwater discharges.
During the site visits on June 251h and July 131h, we did not observe a discharge of stormwater
runoff from the site. Samples collected during the July 23rd visit showed a 50% reduction in the
TSS concentrations relative to historical sampling results, and pH results from these samples fell
within the benchmark range of 6- 9 SU.
4) Additional Facility Improvements: The facility is in the process of planning and implementing
additional physical modifications to reduce the quantity and improve the quality of stormwater
discharge. These modifications include:
a) the addition of pocket vegetated areas to provide filtration of stormwater runoff within
the property lines;
b) the addition of retaining walls along portions of West Street to collect and retain
stormwater runoff for additional treatment or reuse in on -site operations (e.g., truck
washing), and
c) closure of two of the four driveway entrances that contribute to discharge of runoff from
the site. The areas around these entrances will be improved to include retaining walls
with trees and landscaping to increase the pervious surface areas onsite.
i DUNCKLEE & DUNHAM, P.C.

Response to NPDES Stormwater Compliance Inspection
Thomas Concrete of North Carolina. Inc.
Raleigh, North Carolina
August 28, 2015
Page 4 of 4
We trust that the corrective measures implemented by Thomas Concrete sufficiently address the
deficiencies noted and will improve the quality of stormwater runoff at the site. Please contact us at (919)
858-9898 or via e-mail at susan(a),dunckleedunham.com if you have any questions regarding this
response.
Sincerely,
Duncklee & Dunham, P.C.
Susan Bostian, P.E.
Senior Engineer
Senior Peer Review:
�, *,d ,+ • (VJ--
Rick Kolb, L.G.
Senior Geologist
Cc: Sam Crawford, Thomas Concrete
Andrew Rodak, P.E.
Senior Engineer
P:\Thomas Concrete\ECAP (Triangle Area plants} 20140%Stonnwater Monimring\RA DENR DWR rest, to iosp 2015- 1523S.doc
1:> DUNCKLEE & DUNHAM, P.C.

North Carolina
Pat McCrory
Governor
NC®ENR
Department of Environment and
June 10.2015
SAM CRAWFORD, TECHNICAL SERVICES DIRECTOR
THOMAS CONCRETE OF CAROLINA INC.
3733 NATIONAL DRIVE— SUITE 124
RALEIGH, NC 27612
Subject:
Dear Permittee:
Resources
Donald R. van der Vaart
Secretary
Multimedia Compliance Inspection
Thomas Concrete of Carolina Inc. —
West Street Plant
Wake County
Department of Environment and Natural Resources staff from the Raleigh Regional Office conducted a
multimedia compliance inspection of Thomas Concrete of Carolina Inc. — West Street Plant on May 22,
2015 for permits and programs administered by the following Divisions:
Division of Air
Division of Energy,
Division of Water
Quality
Mineral, and Land
Resources
Resources
We appreciate your cooperation during the inspection and hope that you have enjoyed the benefit of our
initiative to provide a single inspector capable of handling multiple areas of environmental compliance at
your facility. The results of each applicable inspection and any associated response actions or necessary
corrective measures are detailed in the inspection letters/reports attached to this transmittal sheet. If a
Division report is not attached, you may assume compliance with that particular Division's rules and
regulations at the time of inspection.
If you have any questions regarding this multimedia inspection or the results of each program inspection,
please contact the Raleigh Regional Office at [phone] and ask to speak with the appropriate Division
staff. Thank you for your cooperation.
encl: Air Quality Inspection Report
Stormwater Inspection Report
cc: DAQ RRO Files
DWR RRO Files
DEMLR RRO Files
NCDENR Raleigh Regional Office
1628 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 3800 Barrett Drive, Raleigh North Carolina 27609
Phone: [phone] Eax:[phone]
An Equal Opportunity 1 Affirmative Action Employer- Made in part with recycled paper

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory Donald R. van der Vaart
Governor Secretary
June 5, 2015
Mr. Sam Crawford
Technical Services Director/Environmental Manager
Thomas Concrete of Carolina Inc.
P.O. Box 12544
611 Tucker Street
Raleigh, NC 27603
Subject: NPDES Stormwater Compliance Evaluation Inspection
Certificate of Coverage No. NCG140001
Thomas Concrete of Carolina Inc. — West Street Plant
Wake County
Dear Mr. Crawford:
Staff from the Department of Environmental and Natural Resources conducted a stormwater inspection
on May 8, 2015, as part of a multimedia inspection of your facility. The assistance provided by Mr. Jim
Hinton, the facility manager, and you during the inspection was greatly appreciated. The inspection
report is attached. Findings during the inspection were as follows:
1. Certificate of Coverage (COC) No. NCG140001 under NPDES general permit NCG140000
was issued Thomas Concrete of Carolina Inc. — West Street Plant to discharge stormwater
runoff and process wastewater to Pigeon House Creek, a Class-C NSW stream, in the Neuse
,River Basin.
2. The facility has developed a stormwater pollution prevention plan (SPPP). A review of the
plan indicated that included most components required by the general permit. The following
deficiencies were noted:
a) The retention pond holding truck washing wastewater for recycle was not
depicted on the site map;
b) Employee training was not conducted and documented in 2013;
c) The plan was not reviewed or updated annually as required. Plan updates in 2008
and 2014 were documented.
3. Qualitative and analytical monitoring has been conducted as required by the permit at
outfalls that were active. It was noted that the facility had difficulty to meet the bench
mark values for TSS and pH in the past years, and is currently in Tier 2 monitoring. All
stormwater flows eastward onto the curb of West Street and is collected in a curb inlet, flows
through a culvert, and discharges into Pigeon House Creek. A detention pit at the front of tbq
facility only catches a portion of runoff. It is evident: that the main cause for the bench in,��t1Carolim
�vatura!!y
North Carolina Division of Water Resources 1628 Mail Service Center Raleigh, NC 27699-1628 Phone [phone] Customer Service
Internet: www.ncwaterquality.org Location: 3800 Barrett Drive Raleigh, NC 27609 Fax [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

Page 2 of 2
exceedances is lack of treatment of the stormwater runoff. Other contributing factors might
include the thick layer of dirt/dust in the operation area (due to lack of ground cover and
inadequate housekeeping), and possible wastewater overflow from the truck washing area (a
temporary sand berm was noticed at the east side of the area). The facility must identify
pollution sources that cause these exceedances, evaluate alternatives to current
practices (which do not appear to be adequate), and take actions to reduce/eliminate
pollution sources and provide adequate treatment to stormwater runoff.
4. The only SDO was observed during the inspection and was found maintained and accessible.
Sediment deposition was evident in the stream bed around the discharge point.
Please respond in writing regarding Items 2 and 3 within 60 days of receipt of this letter. If you
have any questions regarding the attached report or any of the findings, please contact Cheng Zhang at
919-791-4200 (or email: [e-mail]). ,
Sincerely,
Cheng Zhang
Environmental Senior Specialist—
RaleighRegional Office
Enclosure: Compliance Evaluation Inspection Form
cc: Central Files
RRO SWP files

Compliance Inspection Report
Permit: NCG140001 Effective: 07/01/11
Expiration: 06/30/16 Owner:
Thomas Concrete Of Carolina Inc
SOC: Effective:
Expiration: Facility:
Thomas Concrete Of Carolina Inc -Raleigh
County: Wake
1131 N W St
Region: Raleigh
Raleigh NC 27603
Contact Person: John Holding
Title:
Phone: [phone]
Directions to Facility:
System Classifications:
Primary ORC:
Certification:
Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 0512112015 Entry Time:
09:30AM Exit Time:
12:30PM
Primary Inspector: Cheng Zhang
Phone: [phone]
Secondary Inspector(s):
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete StormwaterNVastewaler Discharge COC
Facility Status: ❑ Compliant 0 Not Compliant
Question Areas:
Storm Water
(See attachment summary)
Page: 1

permit NCG140001 Owner -Facility: Thomas Concrete Of Carolina Inc
Inspection Date: 05/21/2015 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan
Does the site have a Stormwater Pollution Prevention Plan?
# Does the Plan include a General Location (USGS) map?
# Does the Plan include a "Narrative Description of Practices"?
# Does the Plan include a detailed site map including outfall locations and drainage areas?
# Does the Plan include a list of significant spills occurring during the past 3 years?
# Has the facility evaluated feasible alternatives to current practices?
# Does the facility provide all necessary secondary containment?
# Does the Plan include a BMP summary?
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
# Does the facility provide and document Employee Training?
# Does the Plan include a list of Responsible Party(s)?
# Is the Plan reviewed and updated annually?
# Does the Plan include a Stormwater Facility Inspection Program?
Has the Stormwater Pollution Prevention Plan been implemented?
Comment: Recycle pit was not depicted on the site map.
Employee training was either not conducted or not documented in 2013
Plan updates were documented only in 2008 and 2014.
Secondary containment for eleven aboveground storage tanks (ASTs) was adequate.
Qualitative Monitoring
Has the facility conducted its Qualitative Monitoring semi-annually?
Comment:
Analytical Monitoring
Has the facility conducted its Analytical monitoring?
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas?
Yes No NA NE
• ❑ ❑ ❑
® ❑ ❑ ❑
® ❑ ❑ ❑
® ❑ ❑ ❑
❑❑®❑
® ❑ ❑ ❑
® ❑ ❑ ❑
0 ❑ ❑ ❑
❑ ❑ ❑
• ❑ ❑ ❑
® ❑ ❑ ❑
❑ ❑ ❑
❑ 0 ❑ ❑
® ❑ ❑ ❑
M ❑ ❑ ❑
Yes No NA NE
®❑❑❑
Yes No NA NE
®❑❑❑
1UNIEN 1■
Comment: Analytical monitorinq were conducted semi-annually in 2012 and 2013 and monthly in 2014 (in
Tier 2) The facility has been having difficulty meeting the TSS bench mark.
Permit and Outfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? ® ❑ ❑ ❑
# Were all outfalls observed during the inspection? ® ❑ ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ ® ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ® ❑ ❑ ❑
Comment: The only stormwater discharge outfall (SDO) was observed. Deposition of sediment was noted
in the stream bed around the outfall.
Page: 3

NORTH CAROLINA DIVISION OF
AIR QUALITY
Inspection Report
Date: 05/22/2015
Facility Data
Thomas Concrete of Carolina Inc -West Street Plant
1131 North West Street
Raleigh, NC 27603
Lat: 35d 47.7550m Long: 78d 38.5530m
SIC: 3273 / Ready -Mixed Concrete
NAICS: 32732 / Ready -Mix Concrete Manufacturing
Contact Data
Facility Contact I Authorized Contact
Jim Hazelwood Sam Crawford Sam Crawford
Plant Manger Technical Services Technical Services
[phone] Director/Environmenta Director/Environmenta
[phone] [phone]
Comments: In Compliance 12e-'1nrecL 1^
Inspector's Signature:
Date of Signature:
R-
Raleigh Regional Office
Thomas Concrete of Carolina Inc -West Street Plant
NC Facility ID 9200322
County/FIPS: Wake/183
Permit Data
Permit 04447 / RI 1
Issued 5/12/2014
Expires 4/30/2022
Classification Small
Permit Status Active.
Current Permit Application(s) None
SIP
Program Applicability
Compliance Data
Inspection Date 05/21/2015
Inspector's Name Lori Ann Phillips
Operating Status Operating
Compliance Code Compliance - inspection
Action Code FCE
On -Site Inspection Result Compliance
TSP
S02
NOX
VOC
CO
PM10
*HAP
2008
0.6590
---
---
---
---
0.3730
0.0927
2013
0.4160
---
---
---
0.1820
0.0130
Date Letter Tvae Rule Violated
Performed Stack Tests since last FCE: None
Date Test Results Test Method(s)-
* Hi¢hest HAP Emitted
Violation Resolution Date
Source(s) Tested
(1) DIRECTIONS TO FACILITY: From RRO take Six Forks Road to Wake Forest Road. Tom right on Capital Blvd. From Capital
Blvd. take a right onto Dortch Street (approximately 1/4 mile past the Wade Avenue exit). At the end of Dortch Street, take a right
onto West Street and the facility is about 114 mile on the left.

jo ... 9.
(II) FACILITY DESCRIPTION: This facility is a truck mix concrete batch plant
Standard safety gear (hard hat, safety sI hoes, vest, and safety glasses) are required for this inspection.
(III) INSPECTION SUMMARY: On May 22, 2015, 1(Lori Ann Phillips), along with Chong Zhang (Water Resourcres) and
Thad Valentine (Land Quality), met with Jim Hazelwood, Plant Manager, to conduct a multi -media compliance inspection of the
facility.
This inspection report will only detaill the air permit inspection. Mr. Hazelwood and I first reviewed the permit and reviewed the
facility's recordkeeping requirements I was able to view the loading of multiple trucks (washed rock and cement) from the
control room: We then took a tour of the facility. A previously unknown boiler was observed during the inspection, as noted
below.
Overall the facility appeared to be running well from an air quality standpoint. No visible emissions were observed after
watching multiple trucks being loaded. All equipment appeared well maintained. There were some minor visible emissions from
fugitive dust moving across West Street whenever a truck exited the property. I discussed this with Mr. Hazelwood and
suggested the facility find a means for dust suppression to keep these fugitive dusts at bay.
(IV) PERMITTED EMISSIONS SIOURCES:
1. Two bagFlters (250 square feet offilter area, CD-C-2-1, CD-C-2-2) installed on two Cement Storage Silos (2035 cubic feet
storage capacity, each, ES-SILO-2-1, ES-SILO-2-2)
2. One bagflter (250 square feet offilter area, CD-C-1) installed on a cement storage Silo (4070 cubic feet storage capacity,
ES-SILO-1)
f ,
3. One bagfllter (156 square feet of filter area, CD-C-3) installed on a cement Storage Silo (3200 cubic feet storage capacity,
ES-SILO-3) .
I
4. One bagfilter (250 square feet offilter area, CD-C-4) installed on a flyash Storage Silo (4070 cubic feet storage capacity, ES-
SILO-4) I
5. One bagfilter (250 square feet offilter area, CD-C-5) installed on a weigh butcher (12 batches per hour maximum capacity,
ES-BATCH-5) i .
6. One bagf/ter (1,216 square feed offilter area, CD-C-6) installed on a mixer (120 cubic yards per hour capacity, ES-MLYER-
6)
All equipment was observed and appeared to be well maintained. The plant was mixing concrete and filling trucks at the
time of the inspection.
(V) SPECIFIC PERMIT
A.1 Applicable Regulations: The Permittee shall comply with 15A NCAC Subchapter 2D .0202, 2D .0515, 2D .0521, 2D .0535,
1D .0540, 2D .0611, 2D .1100 and 2Q .0711. In compliance. See below for further details.
A.2 2D .0202 Registration ofAir'Pollution Sources: The Director may require an owner or operator of a source ofair pollution
to register that source. In compliance. The facility recently renewed their air permit.
A.3 Particulate Emission Limitations: Pursuant to 15A NCAC 2D .0515, particulate matter emissions from the affected emission
sources listed in the permit shall not exceed allowable emission rates which are determined based on process throughput rates
using the equations provided in the permit. In compliance. Compliance is achieved through the use of a series of well
maintained bag6lters.
AA 2D .0521 Control of Visible!Emissions.' Visible emissions from the facility (all permitted items), established after July 1,
1971, shall not be more than 20 percent opacity. In compliance. No visible emissions were observed during the inspection.

A.5 2D .0535 Notification Requirements: Facility is required to notify the Division of Air Quality if excess emissions are
released far more than four (4) hours. In compliance. Mr. Hazelwood stated that there was no reason to contact the DAQ
due to a malfunction since the previous inspection.
A.6 2D .0540 Fugitive Dust The facility shall not allow fugitive dust to extend beyond the property's boundary. In
compliance. The RRO has not received any complaints pertaining to fugitive dust at the facility. Some fugitive dust was
observed crossing the property boundary as cement trucks exited the property onto West Street. I discussed the need to
try to eliminate these dust emissions via the use of a water truck or some other measure.
A.7 Bagflter Inspection and Maintenance Requirements: Particulate emissions from emission sources with bagflters shall be
controlled by the bagfilters identified in the permit. At a minimum, an annual internal inspection shall be conducted on each
bagflter. The Permittee shall maintain a bagfilter logbook on site which summarizes all of the bagflter inspection and
maintenance activities. In compliance. The facility conducts weekly inspections, as well as monthly maintenance, on the
bagfilters. Additionally, a private company comes quarterly to provide more through internal inspections. All records
were complete and up to date. The most recent internal inspection was conducted on February 10, 2015.
A.8 Toxic Air Pollutant Emission Limitations: Pursuant to 15A NCAC 2D .1100, the Permittee shall not exceed the toxic
emission limits specified in the permit. In compliance. The Permittee must comply with the record keeping and annul
reporting requirements outlined in the permit. In 2014, the facility produced 53,148 cubic yards of concrete. As of April
2015, the facility has produced 17,947 cubic yards of concrete for the year. The facility's annual report was received at
the RRO on January 12, 2015.
A.9 Control and Prohibition of Odorous Emissions. The facility shall not allow for odorous emissions to cause or contribute to
objectionable odors beyond the facility boundary. In compliance. No odors were detected during the inspection. No
complaints are on file with DAQ.
A.10 Toxic Air Pollutant Emissions Limitation Requirement; The facility shall apply for a permit to emit any of the TAPS in the
table if actual emissions from the sources will become greater than the TPERs. In compliance. Compliance is demonstrated
through the permitting process.
(Vt) GENERAL PERMIT CONDITIONS:
B.2 Records Retention Requirement - Any records required by the conditions of this permit shall be kept on site for at least 2 yr and made
available to DAQ personnel for inspection upon request.
In compliance. All required records are kept onsite and readily available. The facility has multiple years of reports and data
available.
B.5 Reporting Requirement - Any of the following that would result in previously unpermitted, new, or increased emissions must be
reported to the Regional Supervisor, DAQ.
In compliance. No new equipment has been added to the facility since the last permit renewal or modification.
B.14 Permit Retention Requirement - The Permittee shall retain a current copy of the air permit at the site. The Pennittee must make
available to personnel of the DAQ, upon request, the current copy of the air permit for the site.
In compliance. The facility contact presented a copy of the current air permit, 04447RI1, during the inspection.
B.15 Clean Air Act Section 112(r) Requirements - If the Permittee is required to develop and register a risk management plan pursuant to
Section 112(r) of the Federal Clean Air Act, then the Permittee is required to register this plan in accordance with 40 CFR Part 68.
Not Applicable — This program does not apply to this facility.
(VI) COMPLIANCE HISTORY: On August 24, 2004, the facility received an NOV/NRE for operating an emission source
without a control device and on March 1, 2006, the facility received an NOWNRE for annual reporting requirements.
(Vll) PERMIT EXEMPT EMISSION SOURCES: There are currently no exempt/insignificant sources listed on the facility's
permit. However, an older natural gas -fired boiler was observed during the inspection. The boiler heat rating is 300,000 BTU/hr;
therefore it is exempt from permitting. It shall be added to the insignificant source list during the next permit modification or
renewal.

(VIII) 112(r) APPLICABILITY: The facility is not subject to the Risk Management Plan - 112(r) program.
(IX) STACK TEST REVIEW: There have been no stack tests completed in the last five years.
(X) EMISSIONS INVENTORY REVIEW: Emissions totals in the submitted inventories are in line with the amount of
production reported for both calendar years. No issues are noted.
(X) CONCLUSIONS/RECOMMENDATIONS: At the time of this inspection, Thomas Concrete of Carolina Inc -West Street
Plant appeared to be in compliance with all permitting requirements. Re -inspection is recommended within two years.

�a
NC®ENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
May 12, 2014
Mr. Sam Crawford
Technical Services Director/Environmental Manager
Thomas Concrete of Carolina Inc.
P.O. Box 12544
611 Tucker Street
Raleigh, NC 27603 4K:
Subject: Air Permit No. 04447R11 .
Thomas Concrete of Carolina Inc -West Street Plant
Raleigh, Wake County, North Carolina
Permit Class: Small
Facility ID# 9200322
Dear Mr. Crawford:
In accordance with your completed application received March 31, 2014, we are forwarding
herewith Permit No. 04447R1 I to Thomas Concrete of Carolina Inc -West Street Plant. Raleigh,
Wake County, North Carolina for the construction and operation of air emissions sources or air
cleaning devices and appurtenances. Please note the records retention requirements are contained in
General Condition 2 of the General Conditions and Limitations.
If any parts, requirements, or limitations contained in this permit are unacceptable to you,
you have the right to request a formal adjudicatory hearing within 30 days following receipt of this
permit, identifying the specific issues to be contested. Such a request will stay the effectiveness of
the entire permit. This hearing request must be in the form of a written petition, conforming to G.S.
15013-23 of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. The form for'requesting a formal
adjudicatory hearing n:ay be obtained upon request from the Office of Administrative Hearings.
V
Unless a request for a hearing0is made pursuant to G.S. 15013-23, this air permit shall be final and
binding.
You may request modification of your air permit through informal means pursuant to G.S.
15013-22. This request must be submitted in writing to the Director and,must identify the specific
provisions or issues for which the modification is sought. Please note that the permit will become
final and binding regardless of a request for informal modification unless a request for a hearing is
also made under G.S. 150E-23.
Raleigh Regional Office - Division of Air Quaky
3800 Barrett Drive, Raleigh, North Carolina 27609
Phone: [phone] / FAX: [phone]
Internet: www.ncdenryov
An Equal Opportunity 1.4ffrmative Action Employer - Made in part by recycied paper

3^r4

Sam Crawford
May 12, 2014
Page'?
6i',
Unless exempted by a condition of this permit or the regulations, construction of new
air pollution sources or air cleaning devices, or modifications to the sources or air cleaning
devices described in this permit must be covered under a permit issued by the Division of Air
Quality prior to construction. Failure to do so is a violation of G.S. 143-215.108 and may
subject the Permittee to civil or criminal penalties as described in G.S. 143-215.114A and 143-
215.114B.
This permit shall be effective from May 12, 2014 until April 30, 2022, is nontransferable to
future owners and operators, and shall be subject to the conditions and limitations as specified
therein.
Changes have been made to the permit stipulations. The Permittee is responsible for
carefully reading the entire permit and evaluating the requirements of each permit
stipulation. The Permittee shall comply with all terms, conditions, requirements, limitations
and restrictions set forth in this permit. Noncompliance with any permit condition is grounds
for enforcement action, for permit termination, revocation and reissuance, or modification, or
for denial of a permit renewal application. Specific changes and additions are summarized
below (note: this list may not include all changes and additions):
Added 2D 1806 Control and Prohibition of Odorous Emissions, which does not allow
objectionable odors beyond the facility's boundary.
Should you have any questions concerning this matter, please contact David Miller at 919-791-
4200.
ddm
Enclosures
Sincerely,
Patrick Butler, P.E., Regional Supervisor
Division of Air Quality, NCDENR
c: Raleigh Regional Office
Wl

NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
Issue Date: May 12, 2014 _r-
Expiration Date: April 30, 2022
DIVISION OF AIR QUALITY
AIR PERMIT NO. 04447RI I
Effective Date: May 12, 2014
Replaces Permit: 04447RIO
To construct and operate air emission source(s) and/or air cleaning device(s),.and for the
discharge of the associated air contaminants into the atmosphere in accordance with the provisions
of Article 21 B of Chapter 143, General Statutes of North Carolina (NCGS) as amended, and other
applicable Laws, Rules and Regulations,
Thomas Concrete of Carolina Inc -West Street Plant
1131 North West Street
Raleigh, Wake County, North Carolina
Permit Class: Small
Facility ID# 9200322
(the Permittee) is hereby authorized to construct and operate the air emissions sources and/or air
cleaning devices and appurtenances described below:
Emission Emission Source Control Control System
Source ID Description System ID Description
entral mix concrete batch plant (120 cubic yards per hour maximum capacity) consisting of
It
he following equipment:
ES-SILO-2-I,
ES-SILO-2-2
Two Cement Storage Silos (2035 cubic feet CD-C-2-I Bagfilter (250 square feet of filter area)
storage capacity, each) I -f CD-C-2-2 Bagfilter (250 square feet of filter area)
ES -SILO- Cement Storage Silo (4070 cubic storage CD-C-I Bagfilter (250 square feet of filter area)
I capacity)
ES -SILO-
Cement Storage Silo (3200 cubic feet storage CD-C-3 Bagfilter (156 square feet of filter area)
3
capacity)
ES -SILO- Flyash Storage Silo (4070 cubic feet storage CD-C-4 Bagfilter (250 square feet of filter area)
4 capacity)
ES- Weigh Batcher (12 batches per hour maximum CD-C-S Bagfilter (250 square feet of filter area)
BATCFI-5 capacity)
ES-
Mixer (120 cubic yards per hour capacity)
CD-C-6
Ba gfilter (1,2 ] 6 square feet of filter
MIXER-6
area)
in accordance with the completed application 9200322.14A received March 31, 2014 including any

Permit No. 04447RI I
Page')
plans, specifications, previous applications, and other supporting data, all of which are filed with the
Department of Environment and Natural Resources, Division of Air Quality (DAQ) and are
incorporated as part of this permit.
This permit is subject to the following specified conditions and limitations including any
TESTING. REPORTING. OR MONITORING REQUIREMENTS:
A. SPECIFIC CONDITIONS AND LIMITATIONS
; t r� n f I p
1. Any air emission sources or control devices authorized to construct and operate above must
be operated and maintained in accordance with the provisions contained herein. The
Permittee shall comply with applicable Environmental Management Commission
Regulations, including Title 15A North Carolina Administrative Code (NCAC), Subchapter
2D .0202, 2D .0515, 2D .0521, 2D .0535, 2D .0540, 2D .0611, 2D .1100, 2D .1806 and 2Q
.0711. G / A/nj a, o 1c: n cr, rr � -E
PERMIT RENEWAL AND EMISSION INVENTORY REQUIREMENT - The Permittee,
at least 90 days prior to the expiration date of this permit, shall request permit renewal by
letter in accordance with 15A NCAC 2Q .0304(d) and (f). Pursuant to 15A NCAC 2Q �A
.0203(i), no pen -nit application fee is required for renewal of an existing air permit (with t
a modification request). The renewal request (with AA application form) should be
submitted to the Regional Supervisor, DAQ. Also, at least 90 days prior to the expiration
date of this permit, the Permittee shall submit the air pollution emission inventory report
(with Certification Sheet) in accordance with 15A NCAC 2D .0202, pursuant to N.C.
General Statute 143 215.65. The report shall be submitted to the Regional Supervisor, DAQ
and shall document air pollutants emitted for the 2020 calendar year.
/ 3. )PARTICULATE CONTROL REQUIREMENT - As required by 15A NCAC 2D .0515
�/ 'Particulates from Miscellaneous Industrial Processes," particulate matter emissions from
the emission sources shall not exceed allowable emission rates. The allowable emission rates
are, as defined in 15A NCAC 2D .0515, a function of the process weight rate and shall be
determined by the following equation(s), where P is the process throughput in tons per
hour (tons/hr) and E is the allowable emission rate in pounds per ho bs/hr). —��
E = 4.10 * (P) ° 67 for P <= 30 tons/hr,
E = 55 * (P))-" - 40 for P >30 tons/hr
4. VISIBLE EMISSIONS CONTROL REQUIREMENT - As required by 15A NCAC 2D
.0521 "Control of Visible Emissions," visible emissions from the emission sources,
manufactured after July 1, 1971, shall not be more than 20 percent opacity when averaged
Y Kver a six -minute period, except that six -minute periods averaging not more than 87 percent
f t opacity may occur not more than once in any hour nor more than four times in any 24-how-
t period. However, sources which must comply with 15A NCAC 2D .0524 "New Source
Performance Standards" or .I 110 "National Emission Standards for Hazardous Air
Pollutants" must comply with applicable visible emissions requirements contained therein.
5. NOTIFICATION REQUIREMENT -As required by 15A NCAC 2D .0535, the Permittee of
a source of excess emissions that last for more than four hours and that results from a
C \iL

Permit No. 04447RI I
Page 3
malfunction, a breakdown of process or control equipment or any other abnormal
conditions, shall:
a. Notify the Director or his designee of any such occurrence by 9:00 a.m. Eastern time
of the Division's next business day of becoming aware of the occurrence and
describe:
i. the name and location of the facility,
ii. the nature and cause of the malfunction or breakdown,
iii. the time when the malfunction or breakdown is first observed,
iv. the expected duration, and
an estimated rate of emissions.
b. Notify the Director or his designee immediately when the corrective measures have
been accomplished.
This reporting requirement does not allow the operation of the facility in excess of
Environmental Management Commission Regulations.
6. FUGITIVE DUST CONTROL REQUIREMENT - As required by 15A NCAC 2D .0540
"Particulates from Fugitive Dust Emission Sources," the Permittee shall not cause or allow
fugitive dust emissions to cause or contribute to substantive complaints or excess visible
i/ emissions beyond the property boundary. If substantive complaints or excessive fugitive
�j dust emissions from the facility are observed beyond the property boundaries for six minutes
1n� .k5in y one hour (using Reference Method 22 in 40 CFR, Appendix A), the owner or
` r perator may be required to submit a fugitive dust plan as described in 2D .0540(0.
"Fugitive dust emissions means particulate matter that does not pass through a process
V stack or vent and that is generated within plant property boundaries from activities such as:
Ut C toc- unloading and loading areas, process areas stockpiles, stock pile working, plant parking lots,
and plant roads (including access roads and haul roads).
o 7. FABRIC FILTER REOUIREMENTS includine cartridae filters, baehouses, and other dry
filter particulate collection devices - As required by 15A NCAC 2D .0611, particulate matter
emissions shall be controlled as described in the permitted equipment list.
a. Inspection and Maintenance Requirements - To comply with the provisions of this
Va
Y permit and ensure that emissions do not exceed the regulatory limits, the Permittee
i1 q �" l shall perform, at a minimum, an annual (for each 12 month period following the
t" \ initial inspection) internal inspection of each bagfilter system. In addition, the
r^y { Permittee shall perform periodic inspections and maintenance as recommended by
' G t the equipment manufacturer. p O: n C q u c r 4 d,
P, v
b. Recordkeenin�Requirements - The results of all inspections and any variance from
manufacturer's recommendations or from those given in this permit (when
h"

Permit No. 04447R11
Page 4
applicable) shall be investigated with corrections made and dates of actions recorded
in a logbook. Records of all maintenance activities shall be recorded in the logbook.
The logbook (in written or electronic format) shall be kept on -site and made
available to DAQ personnel upon request. ,Z Y K co r-(
8. TOXIC AIR POLLUTANT EMISSIONS LIMITATION AND REPORTIN �, S
REQUIREMENT - Pursuant to 15A NCAC 2D .1100 "Control of Toxic Air Pollutants,"'a
in accordance with the approved application for an air toxic compliance demonstration, the
following permit limits shall not be exceeded:
Affected Toxic Air Pollutant Emission Limit
Source(s)
Facility Wide Arsenic & Compounds (total mass of elemental AS, arsine 10.0369 pounds
and all inorganic compounds) (ASC (7778394)) Iper year I
a. Restrictions -To ensure compliance with the above limits, the following restrictions
shall apply:
Production of concrete shall not exceed 125,OOO'cubic yards per calendar
year.
b. Reporting Requirements - For compliance purposes, within 30 days after each
calendar year, regardless of the actual emissions, the following shall be reported to
the Regional Supervisor, DAQ: y� 3
Zale/S 17,5��
i. Cubic yards of concrete produced during t'i e candar year.
Q- -2_4 , I/- _�- 3, iVY i t
c. Recordkeeping Requirements - The following recordkeeping requirements apply: Yr 3
Cubic yards of concrete produced each month.
9. CONTROL AND PROHIBITION OF ODOROUS EMISSIONS - As required by 15A
NCAC 213.1806 "Control and Prohibition of Odorous Emissions" the Permittee shall not
operate the facility without implementing management practices or installing and operating
odor control equipmehf sufficient to prevent odorous emissions from the facility from
causing or contributing to objectionable odors beyond the facility's boundary.
10. TOXIC AIR POLLUTANT EMISSIONS LIMITATION REOUIREMENT - Pursuant to
u 15A NCAC 2Q .0711 "Emission Rates Requiring a Permit," for each of the below listed
toxic air pollutants (TAPS), the Permittee has made a demonstration that facility -wide actual
emissions do not exceed the Toxic Permit Emission Rates (TPERs) listed in 15A NCAC 2Q
.0711. The facility shall be operated and maintained in such a manner that emissions of any
lity, including fugitive emissions, will not exceed TPERs listed in
I�i:�ted TAPs from the faci
at�Kfl� ANCAC2Q.0711. CkA2,Gke/l cAv vel!
t 9 a. A permit to emit any of the below listed TAPS shall be required for this facility if
actual emissions from all sources will become greater than the corresponding
TPERs. k [r U�- / \
Pli 0`S �,r0�) b�Vl ����1�
S`-tia

Permit No. 04447RI I
Page 5
b. PRIOR to exceeding any of these listed TPERs, the Permittee shall be responsible
for obtaining a permit to emit TAPS and for demonstrating compliance with the
requirements of 15A NCAC 2D .1100 "Control of Toxic Air Pollutants".
c. In accordance.with the approved application, the Permittee shall maintain records of
operational information demonstrating that the TAP emissions do not exceed the
TPERs as listed below:
[CarcinogensChronic
Acute
j Acute
PollutantToxicants
(lb/yr)
•
Systemic
Toxicants I
Irritants
(lb/day)
(Ib/hr)
(lb/hr)
Beryllium Metal (unreacted)
(Component of BEC) (7440-41-
0.28
F
�
7)
Cadmium Metal, elemental,
unreacted (Component of CDC)
0.37 T_r
(7440-43-9) 1
Chromium (VI) Non -Specific
Compounds, asChrom(VI)
—
0.0056
F__F_
(Component CRC) (NSCR6)
�r
Manganese &compounds
0.63
ickel metal (Component of
INIQ
_7
O.li
(7440-02-0)

\t\
�}r a '
o
.` , �

Permit No. 04447RI I
Page 6
B. GENERAL CONDITIONS AND LIMITATIONS
REQUIRED BY THIS PERMIT shall be submitted to the:
Regional Supervisor
North Carolina Division of Air Quality
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
919-791-4200
For identification purposes, each submittal should include the facility name as listed on the
permit, the facility identification number, and the permit number.
2. RECORDS RETENTION REQUIREMENT - Any records required by the conditions of this
permit shall be kept on site and made available to DAQ personnel for inspection upon
request. These records shall be maintained in a form suitable and readily available for
expeditious inspection and review. These records must be kept on site for a minimum of 2
years, unless another time period is otherwise specified.
3. ANNUAL FEE PAYMENT -Pursuant to 15A NCAC 2Q .0203(a), the Permittee shall pay
the annual permit fee within 30 days of being billed by the DAQ. Failure to pay the fee in a
timely manner will cause the DAQ to initiate action to revoke the permit.
4. EQUIPMENT RELOCATION -Anew air permit shall be obtained by the Permittee prior to
establishing, building, erecting, using, or operating the emission sources or air cleaning
equipment at a site or location not specified in this permit.
5. REPORTING REQUIREMENT -Any of the following that would result in previously
unpermitted, new, or increased emissions must be reported to the Regional Supervisor,
DAQ:
a. changes in the information submitted in the application regarding facility emissions;
b. changes that modify equipment or processes of existing permitted facilities; or
c. changes in the quantity or quality of materials processed.
If appropriate, modifications to the permit may then be made by the DAQ to reflect any
necessary changes in the permit conditions. In no case are any new or increased emissions
allowed that will cause a violation of the emission limitations specified herein.
6. This permit is subject to revocation or modification by the DAQ upon a determination that
information contained in the application or presented in the support thereof is incorrect,

0

Permit No. 04447R 11
Page 7
conditions under which this permit was granted have changed, or violations of conditions
contained in this permit have occurred. The facility shall be properly operated and
maintained at all times in a manner that will effect an overall reduction in air pollution.
Unless otherwise specified by this permit, no emission source may be operated without the
concurrent operation of its associated air cleaning device(s) and appurtenances.
7: This permit is nontransferable by the Permittee. Future owners and operators must obtain a
new air permit from the DAQ.
8. This issuance of this permit in no way absolves the Permittee of liability for any potential
civil penalties which may be assessed for violations of State law which have occurred prior
to the effective date of this permit.
9. This permit does not relieve the Permittee of the responsibility of complying with all
applicable requirements of any Federal, State, or Local water quality or land quality control
authority.
10. Reports on the operation and maintenance of the facility shall be submitted by the Permittee
to the Regional Supervisor, DAQ at such intervals and in such form and detail as may be
required by the DAQ. Information required in such reports may include, but is not limited
to, process weight rates, firing rates, hours of operation, and preventive maintenance
schedules.
11. A violation of any term or condition of this permit shall subject the Permittee to enforcement
pursuant to G.S. 143-215.114A, 143-215.11413, and 143-215.114C, including assessment of
civil and/or criminal penalties.
12. Pursuant to North Carolina General Statute 143-215.3(a)(2), no person shall refuse entry or
access to any authorized representative of the DAQ who requests entry onaccess for
purposes of inspection, and who presents appropriate credentials, nor shall any person
obstruct, hamper, or interfere with any such representative while in the process of carrying
out his official duties. Refusal of entry or access may constitute grounds for permit
revocation and assessment of civil penalties.
13. The Permittee must comply with any applicable Federal, State, or Local requirements
governing the handling, disposal, or incineration of hazardous, solid, or medical wastes,
including the Resource Conservation and Recovery Act (RCRA) administered by the
Division of Waste Management.
14. PERMIT RETENTION REQUIREMENT - The Permittee shall retain a current copy of the
air permit at the site. The Permittee must make available to personnel of the DAQ, upon
request, the current copy of the air permit for the site.
15. CLEAN AIR ACT SECTION 112(r) REQUIREMENTS - Pursuant to 15A NCAC 2D .2100
"Risk Management Program," if the Permittee is required to develop and register a risk
management plan pursuant to Section 112(r) of the Federal Clean Air Act, then the
Permittee is required to register this plan with the USEPA in accordance with 40 CFR Part
68.

Permit No. 04447RI I
Page 8
16. PREVENTION OF ACCIDENTAL RELEASES - GENERAL DUTY - Pursuant to Title I
Part A Section 112(r)(1) of the Clean Air Act "Hazardous Air Pollutants - Prevention of
Accidental Releases -Purpose and General Duty," although a risk management plan may not
be required, if the Permittee produces, processes, handles, or stores any amount of a listed
hazardous substance, the Permittee has a general duty to take such steps as are necessary to
prevent the accidental release of such substance and to minimize the consequences of any
release. This condition is federally -enforceable only.
17. GENERAL EMISSIONS TESTING AND REPORTING REQUIREMENTS - If emissions
testing is required by this permit, or the DAQ, or if the Permittee submits emissions testing
to the DAQ in support of a permit application or to demonstrate compliance, the Permittee
shall perform such testing in accordance with 1 5A NCAC 2D .2600 and follow all DAQ
procedures including protocol approval, regional notification, report submittal, and test
results approval.
Permit issued this the 12t' of May, 2014.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Patrick Butler, P.E.
Regional Supervisor
By Authority of the Environmental Management Commission
Air Permit No. 04447R11

NORTH CAROLINA DIVISION OF
AIR QUALITY
Inspection Report
Date: 05/08/2014
Facility Data
Thomas Concrete of Carolina Inc -West Street Plant
1131 North West Street
Raleigh, NC 27603
Lat: 35d 47.7550m Long: 78d 38.5530m
SIC: 3273 / Ready -Mixed Concrete
NAICS: 32732 / Ready -Mix Concrete Manufacturing
Facility Contact
Jim Hazelwood
Plant Manger
[phone]
Contact Data
Authorized Contact
Sam Crawford
Technical Services
D i rector/En v ironme nta
[phone]
Comments: In Compliance
Inspector's Signature:
Date of Signature:
Thomas Concrete of Carolina Inc -West Street Plant
NC Facility ID 9200322
County/FIPS: Wake/183
Permit Data
Permit 04447/RIO
Issued 7/15/2009
Expires 6/30/2014
Classification Small
Permit Status Active
Current Permit Application(s) Renewal
Technical Contact R SIP
Sam Crawford
Technical Services
D i rector/En vironm e nta
[phone]
Program Applicability
Compliance Data
Inspection Date 05/07/2014
Inspector's Name Roy Doster
Operating Status Operating
Compliance Code Compliance - inspection
Action Code FCE
On -Site Inspection Result Compliance
� Total Actual emissions in TONS/YEAR: I
TSP
S02
NOX
VOC
CO
PM10
* HAP
2008
0.6590
---
---
---
---
0.3730
0.0927
2003
9.57
---
---
---
0.0000
2.70
1.12
Five Year Violation History: None
Date Letter Type Rule Violated
Performed Stack Tests since last FCE: None
Date Test Results Test Method(s)
Violation Resolution Date
Source(s) Tested
(1) DIRECTIONS TO FACILITY: From RRO take Six Forks Road to Wake Forest Road. Turn right on Capital Blvd. From Cap
Blvd. take a right onto Dortch Street (approximately 1/4 mile past the Wade Avenue exit). At the end of Dortch Street, take a right
onto West Street and the facility is about 1/4 mile on the left.
(11) FACILITY DESCRIPTION: This facility is a truck mix concrete batch plant.

(111) INSPECTION SUMMARY: On May 7, 2014, 1(Roy Doster) met with Jim Hazelwood, Plant Manager, to conduct a
compliance inspection of the facility. Mr. Hazelwood and I first reviewed the permit and then took a tour of the facility. At the
time of the inspection, the facility was in operation. Have your safety gear at the ready.
Overall the facility was running well from an air quality standpoint. No visible emissions were observed after watching four
trucks being loaded. Mr. Hazelwood's record keeping was complete and up to date. All equipment appeared well maintained.
(IV) PERMITTED EMISSIONS SOURCES:,,
1. Two bagfilters (250 squarefeei offilter area, CD-C-2-1, CD-C-2-2) installed on two Cement Storage Silos (2035 cubic feet
storage capacity, each, ES-SILO-2-1, ES-SILO-2-2)
2. One bagfilter (250 square feet offilter area, CD-C-1) installed on a cement .storage Silo (4070 cubic feet storage capacity,
F.S-SiLO-I)
3. One bagfilter (156 square feet offilter area, CD-C-3) installed on a cement .Storage Silo (3200 cubic feet storage capacity,
ES-SILO-3)
4. One bagfilter (250 square feet offilter area, CD-C-4) installed on a Jlyash Storage Silo (4070 cubic feet .storage capacity, ES-
SiLO-4)
5. One bagrlter (250 .square feet offilter area, CD-C-5) installed on a weigh batcher (12 batches per hour maximum capacity,
ES-BATCH-5)
6. One bagliker (1,216 square feet offilter area, CD-C-6) installed on a mixer (120 cubic yards per hour capacity, ES-MIXER-
6)
All equipment appeared to be well maintained. The plant was mixing concrete and filling trucks at the time of the
inspection.
(V) SPECIFIC PERMIT CONDITIONS:
A.1 Applicable Regulations: The Permittee shall comply with 15A NCAC Subchapter 2D .0202, 2D .0515, 2D .0521, 2D .0535,
2D .0540, 2D.0611, 2D.1100 and 2Q.0711. In compliance. The facility was in compliance with all permit conditions.
A.2 2D .0202 Registration of Air Pollution Sources: The Director may require an owner or operator of a source of air pollution
to register that source. In compliance. The facility has an air permit.
A.3 Particulate Emission Limitations: Pursuant to 15A NCAC 2D .0515, particulate matter emissions from the affected emission
sources listed in the permit shall not exceed allowable emission rates which are determined based on process throughput rates
using the equations provided in the permit. In compliance. Compliance is achieved through the use of a series of well
maintained bagfilters.
A.4 2D .0521 Control of Visible Emissions: Visible emissions from the facility (all permitted items), established after July 1,
1971, shall not be more than 20 percent opacity. In compliance. No visible emissions were observed during the inspection.
A.5 2D .0535 Notification Requirements: Facility is required to notify the Division of Air Quality ifexcess emissions are
released for more than four (4) hours. In compliance. Mr. Hazelwood stated that there was no reason to contact the DAQ
due to a malfunction.
A.6 2D .0540 Fugitive Dust: The facility shall not allow fugitive dust to extend beyond the property's boundary. In
compliance. No fugitive dust was observed leaving the property during the inspection. The RRO has not received any
complaints pertaining to fugitive dust at the facility.
A.7 Bag/filter Inspection and Maintenance Requirements: Particulate emissions from emission sources with bagfilters shall be
controlled by the bagfilters identifted in the permit. At a minimum, an annual internal inspection shall be conducted on each
/Y
.sir

baglilier. The Permittee shall maintain a bagftlter logbook on .site which summarizes all of the bagfilter inspection and
maintenance activities. In compliance. Daily walk arounds and weekly inspections, and monthly maintenance are
performed on the bagfilters along with annual internal inspections. All records were complete and up to date.
A.8 Toxic Air Pollutant Emission Limitations: Pursuant to 1 5A NCAC 2D .1100, the Permittee shall not exceed the toxic
emission limits specified in the permit The Permittee must comply with the record keeping and quarterly reporting
requirements outlined in the permit. In compliance. Records of production are calculated at Thomas Concrete's home
office and a spreadsheet is faxed to the facility and kept onsite.
(VI) COMPLIANCE HISTORY: On August 24, 2004, the facility received an NOV/NRE for operating an emission source
without a control device and on March I, 2006, the facility received an NOV/NRE for annual reporting requirements.
(VII) PERMIT EXEMPT EMISSION SOURCES: There were no apparent issues with exempt sources at this facility.
(VIII) 112(r) APPLICABILITY: The facility is not subject to the Risk Management Plan - 112(r) program.
(IX) STACK TEST: No stack test in the last five years.
(X) CONCLUSIONS/RECOMMENDATIONS: At the time of this inspection, Thomas Concrete of Carolina Inc -West Street
Plant appeared to be in compliance with all permitting requirements. Re -inspection is recommended within two years.

imap://myrl.nisely%40dwq.denr.ncmail.net a cros.ncmailmet:143/fe..
Subject: Update on Thomas Concrete
From: Myrl Nisely <[e-mail]>
Date: Wed, 19 Nov 2003 10:52:23 -0500
To: Ken Schuster <[e-mail]>, Vanessa Manuel <Vanessa.Manuel @ncmail.net>
In a telephone conversation today with Jeff Sumrell, Engineer with
Thomas, he stated that the company contracted with Freehling and
Robertson about three weeks ago to deal with their stormwater issues at
all facilities, including upgrading their manuals. That company had the
SP3 manual for West St. last week when I attempted an inspection. He
further stated that the company has plans to tear down the West St.
facility in 2005 and completely rebuild it to gain compliance.
Myrl
Note added later to round out this phond log: I encouraged Jeff to keep his pH and
TSS adjusting ideas going. He was closing in on a technology that would not break
the bank, and should be effective. He stated that he has heard recently of using
CO2 for pH adjustment, that it works well in this situation. Food for thought.
Myr1 A. Nisely---•c
Ilrtv.roruneantal. Speoc1aIi.st: TT
NC D.F.NR - Div. WaterQual:t.ty
Raleigh Regional Office
1628 Mail. Sexv.iue Center.
Raleigh, NC 27699-1628
( l R (1 /19/03
Telephone: [phone], Extension 272
Fax: [phone]
myrl.niselyCancmail.net
1 of 1 11/19/2003 10:52 AM

November 14, 2003
Memo
To: File -mq
LLw
From: Myrl Nisely and Carrie Wafer
Entered: 10:25 AM Left: 11:OOAM
Subject: Thomas Concrete Recon (West Street) on 11/14/03
NPDES Permit No. NCG140001
Wake County
On Friday, 11/14 we intended to make a CEI inspection to see if improvements have been
made since last inspection and prior to an enforcement hearing early in 2004. Virtually
nothing has changed.
Jeff Sumrell was unable to meet with us, but we learned by radio that in the last two
weeks Thomas Concrete has contracted with consulting firm F & R (research them) to
rewrite their SP3 manual and recommend changes at the plant site. The book was in the
possession of F & R, so this inability to review the manual caused us to drop back to a
recon visit instead of CEI.
Today Pigeonhouse Creek flow was clear with no release from the concrete plant.
Trucks were loading in quick succession, and a water spray was used to suppress dust as
they loaded. This water was conducted via a shallow channel shaped in the concrete to
the pit near the street. The pit was capturing everything from the loading station on this
dry day, but would not during a heavy rain. c-a Cn A rnu� 1p*�f (I LD/ONCi✓
The detention pit at the front of the plant was virtually ful looking as it had earlier with
evidence of leakage to a row of hay bales. The silt fence for several feet at one end. This h
system of stormwater management has not changed since the last inspection in October, M
2002 and continues to be unacceptable.
The crushed stone part of the site had been scraped recently. The slope from the back to
the front of the plant makes it seem certain that heavy rains will wash considerable solids
to the street from this part of the facility.
Mr. Com stated that water from the recycle unit is used at times to wash down the
concrete lot. This is a release of untreated water (pH about 12) not allowed by the
permit.
The inside of the admixture containment structure was dry and showed no evidence of
chemical release. Trash needs to be removed, however. The used oil containment was
satisfactory.
Effort will be made to communicate to Sumrell our expectations on where improvements
are needed. It will be informative to see this location during a heavy downpour.

July 1, 2003
Memo
To: File (� . \
I Y \ n ,/)
From: Myrl Nisely r Entered: 12:25 PM Left: 1:10 PM
Subject: Thomas Concrete Recon (West Street) on 7/ 1/03 to Observe Stormwater
Releases after Report from Susan Gale on Friday, 6/27/
NPDES Permit No. NCG140001
Wake County
On Friday, 6/27 pictures were taken showing a significant flow from the stormwater drain
into Pigeon House Creek across from Thomas Concrete. There had been no rain for
several days. See attached pictures.
Today the flow was minimal and clear. An attempted picture shows the concrete channel
with orange colored water. The water entering the large conduit on the upstream side of
the concrete plant, (running onto the plant) looked to be that same volume and color.
Conclusion: the plant was not releasing today. Damp water lines on the inside wall of the
recycle pit showed that levels have been about 4 or 5" higher than they were today,
possibly recently.
The detention pit at the front of the plant was virtually full, with evidence of recent
leakage out to a puddle that exists up against a row of hay bales. Leakage had also come
from the side of this structure. This system of stormwater management has not changed
since the last inspection in October, 2002 and continues to be unacceptable.
I showed Mgr. Bobby Corn the pictures from Friday, but he offered no comment and
claimed not to know much about the situation. At that point I stated that I would work
with Jeff Sumrell. We talked a bit about the system Jeff had been designing to attenuate
pH and remove TSS. I had tried unsuccessfully to contact Jeff to make this inspection
with me, but he is out of the country on vacation. I will follow with him upon his return
next week.
Incidentally, the enforcement proceedings against this plant that were started in January,
2003, have not yet been completed. Contact will be made with Central Office to learn the
status.

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Subject: [Fwd: Thomas Concrete photos)
Date: Fri, 27 Jun 2003 16:02:09 -0400
From: Myrl Nisely <[e-mail]>
To: Sandy Whitley <[e-mail]>
Myrl A. Nisely
Environmental Specialist II
NC Dept. of Environment and Natural Resources
Div. Water Quality
Raleigh Regional Office
1628 Mail Service Center
Raleigh, NC 27699-1628
Telephone: [phone], Extension 272
Fax: [phone]
Subject: Thomas Concrete photos
Date: Fri, 27 Jun 2003 15:26:59 -0400
From: Susan Gale <[e-mail]>
To: myrl nisely <[e-mail]>
CC: [e-mail]
Hi Myrl--
I've attached some of the pictures Andrea and I took this morning
(11:40) at Pigeon House Branch at Thomas Concrete. As you can see, in
spite of several days of dry weather there's a good amount of flow
coming out of their "storm" drain. Looking at the pictures of the
creek, you can see the change in color of the water, which persists
downstream quite a ways-- we walked down almost to where Pigeon House
goes under the entrance to Capital and the water's still gray.
Let me know if you need any more information. Hope these help!
Susan
Compan1es
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FOR
RALEIGH, NC
(440')
LAT=35.9N
LON-
78.8U
TEMPERATURE
PRECIPITATION
ACTUAL
NORMAL
HI
LO
AVG
HI
LO
AVG
DEPT
A141JT
SNOW
SNCVR
HDD
1
74
51
63
82
60
71
-8
0.00
0.0
0
2
76
47
62
83
60
72
-10
0.00
D.0
0
3
3
79
60
70
83
61
72
-2
0.17
0.0
0
0
4
82
67
75
83
61
72
+3
0.06
0.0
0
0
5
79
58
69
83
61
72
-3
0.00
0.0
0
0
6
82
54
68
84
61
73
-5
trace
0.0
0
0
7
78
68
73
84
62
73
+0
1.19
0.0
0
0
8
85
70
76
84
62
73
+5
0.12
0.0
0
0
9
86
64
75
84
62
73
+2
0.00
0.0
0
0
10
89
59
74
85
63
74
+0
0.00
0.0
0
0
11
90
63
77
85
63
74
+3
0.00
0.0
0
0
12
88
71
80
85
63
74
+6
0.19
0.0
0
0
13
87
72
80
85
63
74
+6
0.00
0.0
0
0
14
88
70
79
85
64
74
+5
trace
0.0
0
0
15
86
69
78
86
64
75
+3
0.32
0.0
0
0
16
77
67
72
86
64
75
-3
0.23
0.0
0
0
17
71
66
69
86
64
75
-6
0.00
0.0
0
0
18
85
66
76
86
65
75
+1
0.27
0.0
0
0
19
83
69
76
86
65
76
+0
0.66
0.0
0
0
20
80
65
73
86
65
76
-3
0.51
0.0
0
0
21
75
58
67
87
65
76
-9
0.00
0.0
0
0
22
81
55
68
87
65
76
-6
0.00
0.0
0
0
23
86
59
73
87
66
76
-3
0.00
0.0
0
0
24
90
59
75
87
66
77
-2
0.00
0.0
0
0
25
92
63
78
87
66
77
+1
0.00
0.0
0
0
26
93
66
80
87
66
77
+3
0.00
0.0
0
0
27
92
68
80
88
66
77
+3
0.00
0.0
0
0
28
80
67
74
88
67
77
-3
0.16
0.0
0
0
29
89
65
77
88
67
77
+0
0.00
0.0
0
0
30
91
69
80
88
67
78
+2
0.28
0.0
0
0
TOTALS FOR RDU
HIGHEST TEMPERATURE 93 TOTAL PRECIP 4.16
Fo.j. I WBascva.,. Mnnos .- a Nease (E1Con fAccuW G•iLfidert .. -iDesllop"
_ 1

State of North Carolina
Department of Environment ®Z•��
and Natural Resources
Raleigh Regional Office
Michael F. Easley, Governor NCDENR
William G. Ross, Secretary
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
November 25, 2002
Mr. John N. Holding
Thomas Concrete of Carolina, Inc.
P.O. Box 12544
Raleigh, NC 27605
Subject: Compliance Evaluation Inspection
NPDES Stormwater Permit NCG140001
Thomas Concrete of Carolina, Inc. / West Street
Wake County
Dear Mr. Holding:
Il
On October 18, 2002 Mr. Myrl Nisely of this office conducted a stormwater inspection of the West
St. facility. The inspection was done to review compliance in preparation for our meeting on October
24. The assistance of Bobby Corn, Plant Manager was greatly appreciated.
The SPPP manual had been taken from the plant by Mr. Sumrell, so no review was possible. Its
contents will be a major topic of our meeting, so this was understandable.
The drain holes in the base of the recycle cell have been sealed, and the path of discharge has been
excavated out of existence. Water is allowed to exit this system and puddle in front of the cells. Is
the recycle structure designed to contain the stormwater and process water per Section C(3)?
pH of water in the recycle basin measured 12.4. We bring to your attention a worker safety
concern. High pH water (>10) is strongly caustic, and is damaging to skin and eyes. Workers
should use great caution in spaying down trucks or otherwise coming in contact with this water
Water from activities immediately on the south side of the office building runs to a collection basin,
then overflows to a storm drain in the street. This system shows better control that what was
observed in earlier inspections, but may still be allowing damaging water into the stone system.
Some of the flow goes around the basin to the street, so is not collected. pH in the basin was
measured at 10.6, above the limit of 6 to 9. Hay bales and a silt fence have held back solids released
from the basin. How are samples taken of water just before it discharges into the storm? Such
samples would be representative of what is being sent to waters of the State.

Thomas Concrete, West St.
p. 2
Fuel oil/waste oil secondary containment was satisfactory. Ifthe drain is used to release rainwater,
training should be given to watch carefully for an oil/water interface and close the valve when oil
is first observed.
Housekeeping could be improved around the Maintenance buildings and oil containment areas
For your information, our office is requiring an Authorization to Construct for pH installations,
any plant expansions and for new facilities.
Please reply to the above questions by December 31. If you have any questions regarding this
inspection please contact Myrl Nisely at 919-571-4700.
Sincerely,
Kenneth Schuster, P.E.
Regional Water Quality Supervisor
cc: NPDES Compliance Unit
Wake Co. Health Dept.
Central Files
1628 Mail Service Center, Raleigh, NC 27699.1628 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled110% post -consumer papa

METER CALIBRATION SHEET
UNIT 6CQV DATE 10 j' OZTIME U
NAME
D.O. METER r--SCT METER
Meter Number
Membrane Last Replaced
Batteries Last Replaced
Red Line
Zero
Initial Calibration
Air
Temperature
D.C. from Tacie
Barometric pressure or Alt. Facor
Fac:cr X from Tacie = Caiic. D.C.
X
Meter Reacir.c
Meter Correctec :c
Winkler
Winkier»1 Vawe
fancier o� tame
Meter Reacinc
:1QeLe:Correc:ec :❑
Final Calibration
Air
7emcera:ure
7acie
Saromemc a:essure or Al-- Facer
Factor X D.D.'rcm Tacie = Caiiit. D.C.
Meter ^.eating
!deter Ccrtectea :o
Winkler
Winkier" Vaiue
Winkier.2 Vaiue
Meter R.acir.:
Meter Corrected ;a
Meter Number
Probe Last Replaced
Batteries Last Replaced
Red Line
Zero
Initial Calibration
Standard 11 1147 umhoa.)
Temperature
Sid. alter Tema. Correction
Meter Reading
K Vaiue = Sta after Temc. Correction
Meter Reacing
K Vawe = 1
K Vaiue =
Standard a•2 (718 umhoa.)
7emoerature
Sta. after Tema. Correction
Meter Reading
Final Calibration
Stancara Vaiue
7emoerature
Sic. after Tema. Correction
Meter Reacinc
COMMENTS:
I :pH METER -I
Meter Mfg, by
Meter Number
Probe Last Replaced T
Batteries Last Replaced
Buffer Sol. Last Replaced
Initial Calibration
Buffer •1 M:66-er-7:06) '7
Temperature 2I.
Buffer after Temp- Correction/,
Meter Reading .03
Meter Corrected to —
Buffer 12 14.01 a
-emoerawre
Buffer after Tema. Corrrwtiorn' p
Meter Reading 9, d" Q
��cc77��
Meter Carrec:ec :o � 0 ,6D
t,,w 1
Final Calibration
Surer Vaiue
7emoerature
Buffer after 7emc. Carrr_cicn
Meter Reading G.99
Meter Correctec to
k

S—tte of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
J.N. HOLDING
THOMAS CONCRETE OF CAROLINA, INC.
PO BOX 12544
RALEIGH, NC 27605
NCDENF
ENVIRONMENT
July 26, 1999
Subject: Reissue - NPDES Stormwater Pert
Thomas Concrete of Carolina, Inc.
COC Number NCG 140001
Wake County
Dear Permittee:
In response to your renewal application for continued coverage under general permit NCG140000, the Division of
Water Quality (DWQ) is forwarding herewith the reissued stormwater general permit. This permit is reissued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between the state of North Carolina and the U.S. Environmental Protection Agency, dated December 6, 1983.
The following information is included with your permit package:
* A copy of general stormwater permit NCG140000
* A Stormwater Pollution Prevention Plan (SPPP) Certification Form. Completion of this form is required to
certify that you have developed and implemented the SPPP as per the conditions of the permit. This form
must be completed and returned to the Division within 30 days of receipt of this letter.
DO NOT SEND the SPPP with the signed form.
* Five copies of the Analytical Monitoring form and five copies of the Qualitative Monitoring form
* A copy of a Technical Bulletin for the general permit which outlines changes in the permit, key requirements,
and addresses frequently asked questions
* A Certificate of Coverage
Your coverage under this general permit is not transferable except after notice to DWQ. The Division may require
modification or revocation and reissuance of the Certificate of Coverage. This permit does not affect the legal
requirements to obtain other permits which may be required by DENR or relieve the permittee from responsibility
for compliance with any other applicable federal, state, or local law, rule, standard, ordinance, order, judgment, or
decree. -
If you have any questions regarding this permit package please contact Aisha Lau of the Central Office Stormwater
and General Permits Unit at [phone], ext. 578
Sincerely,
for Kerr T. Stevens
cc: Central Files
Stormwater and General permits Unit Files
Raleigh Regional Office
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] Fax [phone]
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STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE No. NCG140001
STORMWATER AND PROCESS WASTEWATER DISCHARGES
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
THOMAS CONCRETE OF CAROLINA, INC.
is hereby authorized to operate a process wastewater treatment system, and is hereby authorized to discharge process
wastewater and stormwater from a facility located at
THOMAS CONCRETE OF CAROLINA, INC.
1131 N WEST STREET
RALEIGH
WAKE COUNTY
to receiving waters designated as Pigeon House Branch in the Neuse River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, Il. III,
IV, V, and VI of General Permit No. NCG140000 as attached.
This certificate of coverage shall become effective August 1, 1999.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day July 26, 1999.
for Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

i�
S?ate bf North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. J. N. Holding
Carolina Ready Mixed
P.O. I3ox 12544
Raleigh, NC 27605
Dear Mr. Holding:
Concrete Co., inc.
September 30. 1994
Subject:
OCT 3 1994
DEHNR RALEIGH REGIONAL OFFICE
General Permit No. N(
Carolina Ready Mixed
COC NCG 140001
Wake County
Concrete Co., Inc.
In accordance with your application for discharge permit received on October, 1, 1992, we are
forwarding herewith the subject certificate of coverage to discharge under the subject state - NPDES general
permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215 .1 and the
Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated
December 6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to request an individual permit by submitting an individual permit
application. Unless such demand is made, this certificate of coverage shall be final and binding.
Please take notice that this certificate of coverage is not transferable except after notice to the Division
Of Environmental Tv4anagement. The Division of Environmental Management may require modification or
revocation and reissuance of the certificate of coverage.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Environmental Management or permits required by the Division of Land Resources, Coastal Area
Managcme-nt Act or any other Federal or Local governmenta! pemit that may be required.
If you have any questions concerning LhiS permit, please contact I_iz Kovasckitz at telephone number 919/733-
5083.
Sincerely,
Original Signind $/
coleen FS. SiA. Preston Howard. Jr.. P. E.
ec: <Ral_ci'gh=Reg onal=Office
Wake County
P.O. Box 29535, Raleicn. North Carolina 27326-0535 Telephone [phone] FAX [phone]
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STATE OF NORTH CAROLINA
DEPAR"I'MEN'1' OF F_NVIRONNNIEN''I', HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
STORMWATER DISCHARGES
NATIONAL POLLUTANT DISCHARGE FI,IIVIINATION SYSTEM
In contpIiamce with the provision of North C iolina General Snuute Ida 2I5.1, other lawful slaudni(Is and
regulations promulgated and adopted by the North Carolina Environntcnill Mtmagemcnt Commission, and the
Federal Water Pollution Control Act, as amended,
Carolina Ready Mixed Concede Company, lac,
is hcrehv authorized to dischareu stonnwater from a facility I(xaled at
Carolina Ready :-ixed Concrete Company, Inc.
I I 3 I North West Street
Raloigh
Wakc County
to leceiving waters desi_naled as Pigeon I louse Branch in the Neu.se River Basin
in accordance with lire effluent limitations, monitoring-, requirements, and other conditions set forth in Parts I, II, 111
and IV of General Permit No. NCG I40000 as attached.
This certificate of covet ige Shall become effective Septcmher 30, 1994
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signal this day September 30, 1994
n iginal Signed BY
Coleen K. Sullins
A. Preston Iloward..li:. P.F..., Director
Division of Environmental Manegcinew
By Authority of the Environmental Mana"ement Commission

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DUNCKLEE & DUNHAM
exnnon..Hret aecwe1e1e • HMO] ...Af
Susan Bostian PROGRAM MANAGER
P.E. SENIOR ENGINEER
Ph 919.858-9898
ce11919-417-2899
r susanOdunckteedunhem.com

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�e Facility Name iThomas Concrete of Carolina
Project Number 199 0118
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Project Typeej piupose of concrete
plant I County Iw r6c
I€Location =US 1 ; UT to NCUSC County2
Received From AYP
COE ID # I� Region Raleigh
Received Date February 5, 1999
COE Sus Date Reg. Contact Danny Smith
Sent to Region Date 2/12/1999
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DCM Susp Date 'APPLICATION FEE INFO
Rcvd Region Datell
TIP Number Payment Date 3/23/1999
Last Action Date April �1, 1999
More Info Requested � fAmo�
"Last Action Issuc General
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More Info Received Payor
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Latitude (ddmmss) 355513
Mitigation ? Check #
Longitude (ddmmss) 783300
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Index.',' Prim. ,'Supp. Class. Appr. Req.. Appr.
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Notes for Meeting with John Holding and Jeff Sumrcll on Oct. 24, 9 AM
Get Jeff's address and phone no.
USGS Map — asking everybody to zoom in closer to show each discharge leaving the site,
and following them all the way to waters of the State. Not sure there is a good source for
that level of mapping. Soil maps may help.
Site Map — asking for lines of demarcation for the areas served by each discharge point.
Need good arrows showing direction of flow
Signif Spill — if none for last 3 years, have a signed sheet in the SPPP saying so.
Otherwise, record the specifics immediately after spill cleanup.
Feasibility Study — simply inspect each plant looking for materials exposed to rain that
could produce contaminated rain (pH or solids, basically). Then ask, would it be feasible
to move this stuff indoors? Or build a roof over it? Write up a description of this
evaluation process and the changes tirade at the plant as a result. Or document that
nothing could possibly be done to improve the loading, handling and storage practices,
and why.
Sec. Containment — 40CFR112.8 requires enough to assure containment of largest
container plus precipitation. Many site say chemicals are not exposed to rain. But they
are, unless covered by a roof.
BMPs — discuss the need for controlling flow, dropping solids, and controlling (altering)
pH. Nigy be including protection of ground water, too.
Will
Out of date info — this is purpose of at least an annual update of the manualsh�ould be
a living document, reflecting any changes that take place.
Training records — to document 1) the topics covered, 2) signature of the teacher(s), 3) 0
signature of each employee attending. These can all be on one sheet of paper for a given
session (compare to submittals). The spill prevention, sensitivity training for stormwatcr
is to be given at least annually to ALL employees al the site.
Inspection records — document both dry and wet inspections

e
Overflows from the recycle are valid only for overflows occurring during a storm greater
than a 10 yr storm, i.e. 5.6" in 24 hours in central NC. Mr. Bobby Schultz stated that
holes for this purpose were in place at other facilities, as well.
Health note: high pH in recycle units is damaging to skin and eyes. Workers should use
great caution in spaying down trucks or otherwise coming in contact with this water. -If
er'-s-sife-i{-snap-kill-grass-

i w..

QUARTERLY SITE INSPECTION FORINI
Location Inspected:
Inspector's Name: S l 1 Date:
(Please Print)
Inspector's Signature:
Observations:
Is there accumulated aggregate or sand 1 ��
outside the designated stockpile areas? El Yes �Jo
If yes, please provide details and recommendations:
Areas around stockpiles should be cleaned on a daily basis.
2. Is there evidence of leaking or malfunctioning fuel dispensers? ❑ Yes ' No
If yes, please provide details and recommendations:
Leaking or malfunctioning fuel dispensers should be repaired immediately or taken out of
service.
3. Is there evidence of fluid leaks from vehicles? yes ❑ No
If yes, please provide details and recommendations:
a (Iles :;. i_-"k ala�ry
Vehicles should be inspected by drivers and leaks repaired immediately.
AUG - 1 2003
DENR RALEIGH REGIONAL OFFICE

is there evidence of leaks or spills in admixture storage areas? ❑ Yes XNo
If ves, please provide details and recommendations:
Tanks used to store admixtures will be visibly inspected periodically to
ensure they are not leaking and that there is no rust or other evidence that
integrity is suspect.
5. Is there evidence of leaks or spills in fueling areas? ❑ Yes X'No
If yes, please provide details and recommendations:
Spills and leaks in the fueling area will be prevented by discouraging the
practice of "topping off' vehicle fuel tanks. Employees will be informed -of
the negative impact of spills on storm water quality and "Do Not Top Off'
signs will be posted at the dispenser.
6. Are adequate spill response supplies and equipment readily available near
the dispenser areas? ❑.Yes P-No
If no, please provide details and recommendations:
go,cJ ors Qf.br
Dry sorbents, such as sand or kitty litter, will be stored near potential spill
areas. Spills will be cleaned up promptly and contaminated materials
disposed of properly.
7. Is the scope of activities and the nature and type of
material storage the same as it was in the S WPPP? Yes ❑ No
If no, please provide details:
8. Are any additional actions needed to improve the
quality of storm water discharged from this site? ❑ Yes f §� 1Vo
If yes, please provide details and recommendations: /

STATE OF NORTH CAROLINA
Department of Environment and Natural Resources
Raleigh Regional Office
FILE ACCESS RECORD
L.\
SECTION DATETrIME _ U c
NAME >QOC REPRESENTING =}<D
risFnec ?�
Guidelines for Access: The staff of the -Raleigh Regional Office is dedicated to making public
records in our custody readily available to the public for review and copying. We also have the
responsibility to the public to safeguard these records and to cant' out our day-to-day program
obligations. Please read carefully the following before signing the form.
2.
4
5.
91
2.
3.
4.
5.
Due to the large public demand for file access, we request that you call at least a day in
advance to schedule an appointment for file review so you can be accommodated.
Appointments are scheduled between 9.00 a.m. and 3.00 p.m. Monday Thursday. Viewing
time ends at 4.00 p m Anyone arriving without an appointment may view the files to the
extent that time and staff supervision are available.
You must specify files you want to review by facility name or incident number, as appropriate.
The number of flex that wnj
You may make copies of a file when the copier is not in use by the staffandif time permits.
Cost per copy is 2.5 cents for ALL copies if making more than 25 copies there is no charge if
less than 25 copies are made Payment is to be made by check, money order, or cash in the
administrative offices.
FILES MUST BE KEPT IN THE ORDER YOU RECEIVED THEM. Files may not be taken
from the office. No briefcases large totes etc are permitted in the file review area To
remove, alter, deface, mutilate, or destroy material in one of these files is a misdemeanor for
which you can be fined up to $500.00.
In accordance with General Statute 25-3-512, a $25.00 processing fee will be charged and
collected for checks on which payment has been refused.
The customer must present a photo ID, sign -in, and receive a visitor sticker prior to reviewing .
files.
FACILITY NAME
�vrK(5 Ln(n I`efcG -tirA(fyOo0I
Signature and Name of Firm/Busines Date
Please attach a business card to this form if available
/ q0,;)) I d-�
�Y1 &V I1v; vwq/
COUNTY
c—
�y `f c -
Time In Time Out

Comments on Design of Treatment System
Subject: Comments on Design of Treatment System
Date: Tue, 07 Jan 2003 15:22:03 -0500
From: Myrl Nisely <[e-mail]>
To: Jeff Sumrell<jef£[e-mail]>
CC: Ken Schuster <[e-mail]>
I have feedback for you on several points, some of which we discussed
today, as well as some new ones.
What acid to use? Phosphoric can be ruled out because the addition of
phosphorus to the wastewater would be bad for the environment (a
nutrient for growing all sorts of things). The base we are trying to
neutralize is considered a weak one (largely calcium hydroxide), so a
weak acid should work against it. This suggests acetic might still be
worth another look (at a higher concentration than vinegar). After
that, Hydrochloric seem most likely. As we discussed, it might be
effective at reduced concentrations instead of using the highly
concentrated form. Materials of construction will need to be considered
with dilute HC1, though. The lower concentration can be more corrosive
to metal than the concentrate.
What particle size to remove? It looks like testing will be the only
way to know this. See if your supplier will work with you to run some
of this testing. They perhaps have a lab unit or pilot plant that can
do experimental work for a client.
Now the new info. Per NPDES regulations (15A NCAC 2H.0139), the design
of this treatment system will need to be reviewed and approved by a
professional engineer certified for North Carolina. You may want to
have a PE work with you now anyway to properly size the system.
An Authorization to Construct permit will be needed from us before
installation can begin.
The system (or systems, if you install at several plants) will require
an operator to tend to them. This could be a person who would travel
around to the various plants to take care of them all. A minimal amount
of training and certification will be needed.
I wish you well on your exploration of this idea. Please contact me
again at any point.
Thanks,
Myrl
Myrl A. Nisely
Environmental Specialist II
NC Dept. of Environment and Natural Resources
Div. Water Quality
Raleigh Regional Office
1628 Mail Service Center
Raleigh, NC 27699-1628
Telephone: [phone], Extension 272
Fax: [phone]
1 of 1 1/7/03 3:22 PM

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ORC

r
SERIES 'DF'
FILTRATION SYSTEMS
AUTOMATIC DISPOSABLE FABRIC FILTRATION SYSTEMS FOR:
MODEL DF-11
BULLETIN
F-701P
AUG. 2002
PHOSPHATING / PARTS WASHERS
MACHINE -TOOL COOLANTS
MODEL DF-1.5 ' -
INDUSTRIAL WASTE WATER
PROCESS OR COOLING WATER
WATER WALL SPRAY BOOTHS
TREATED PLATING WASTE
SYSTEM OPERATION
This system is totally automatic and responds to wide
variations in flow rate and solids concentration. Pump the
contaminated solution to the diffuser tray which
distributes flow across the full width of the filter bed.
Particle separation starts immediately via gravity flow
through the media to the clean reservoir below the
conveyor frame. Filtered solution can then gravity drain
to waste or be returned to the process via a pump.
Gravity flow allows gentle accumulation and settling
of solids on the filter fabric. The concave configuration of
the media bed accommodates the flow rate and
maximizes solids loading on the fabric. As the media
gradually becomes laden with solids, the solution level
will slowly rise until the float switch activates the convey
ordrive motor. Consumed fabric is advanced to the sludge
box as fresh media is simultaneously indexed to the
solution flow.
• Unattended operation
Automatically indexing media allows con-
tinuous filtration, even with varying input or
solids content.
• Choice of materials
Carbon steel, 316 stainless steel, CPVC or
polypropylene
• Sizes for any application
From 1.5 to 113 sq. ft. of filter surface area
• Low operating cost
TYPICAL
INSTALLATION

F-701P
Page 2
FILTRATIONSERIES 'DF'
i..rrf Sl'4: -1 ,llNn�. I..r:e4 �. 4G Tn. T'r pli(Ir ir.,.. "..14fI trtof•.r,.-..t N fn1TT.(fi •' .-..I..0 l:il ill l.,rl.: �t r '1'.. •:. 1� 1.• • Lr. Wit!
SPECIFICATIONS
SERIES $ CARBON STEEL reservoir, frame, shafts, bearings and sprockets. Models 1.5 to 11 feature a 316
stainless steel conveyor belt. Larger models have galvanized belt with optional 304 or 316 stainless
steel belt. Units are coated with corrosion resistant 2-part epoxy paint.
SERIES SS 316 STAINLESS STEEL reservoir, frame, shafts, bearings, sprockets and conveyor belt.
Non -wetted surfaces such as fabric bracket, motor bracket and gear reducer are carbon steel.
SERIES CPP CPVC reservoir, frame, polypropylene conveyor belt and sprockets, Delrin° bearings, HDPE sludge box.
PVC shafts on Models 1.5 and 4, 316 stainless steel shafts on Models 8 and larger.
Model 1.5 has polypropylene reservoir.
SERIES PP POLYPROPYLENE reservoir, frame, sprockets and conveyor belt. Delrin bearings, PVC shaft,
HDPE sludge box. Available in 1.5 size only.
All units include: float switch, sludge box (HDPE on Models motor and starter. Standard edge seals are PVC, 140'F
1.5 and 4), a filtrate reservoir which serves as a support for maximum. EPDM and silicon rubber edge seals are optional.
mounting the conveyor frame, drain, single phase drive Order filter media separately.
Model
DF-1.5
2' DRAIN TRAY
MOTOR
FILTER MEDIA (12' DIA. MAX.)
1 T I
x. 22h
INLET HT.0 ----.-....-: ,
A `-SLUDGE
BOX
Models DF-4
to DF-113
MAGNETIC ST7
8 SELECTOR 6
MOTOR 8
REDUCTION U
(LOCATED ON 1
PANEL FOR MOI
OF-4, OF-8, DF-1
OF-15.5)
FILTER MEDIA
(18' DIA. MAX.)
DF-4 to 24, 80'
DF-27 8 LARGER, 35'
DF-4 l0 24, 1D' '- SLUGS INLET
OF DF-4
8 LARGER, 16' 11 CLEAN RESERVOIR BOX Ri'
FILTER
MODEL
FILTER
AREA
TANK
CAPACITY
115V/1/60
DRIVE
MOTOR
OVERALL
DIMENSIONS (INCHES)
INLET
HEIGHT
MEDIA
WIDTH
APPROX.
SHIPPING
WEIGHT
FABRIC MICRON RATING
5
10
25
40
80
LENGTH
WIDTH
(INCHES)
A
B
HEIGHT
SO. FT.
GAL.
HP
C
IN.
LES.
GPM FLOW RATE
OF-1.5
1.5
20
1/15
55
21.5
35.5
17
13
225
2
3
4
1 6
9
DF-4
4
49
1/3
75
28
40
19
16.5
320
5
6
10
14
23
DF-8
8
90
1/3
71
50
40
19
33
580
10
12
20
28
45
DF-11
11
115
1/3
90
50
40
19
33
760
14
17
28
39
62
DF-15
15
130
1/3
98
44
40
18
33
940
19
23
38
53
85
DF-16.5
16.5
160
1/3
90
67
40
19
50
1025
20
-25
42
58
93
DF-19
19
160
1/3
89
62
40
18
50
1025
24
29
48
67
108
DF-24
24
200
1/3
104
62
40
18
50
1420
30
36
60
84
136
DF-27
27
400
1/2
136
68
52
30
50
2400
34
41
68
95
153
DF-29
29
Soo
1/2
162
68
52
30
50
3110
36
44
73
102
164
DF-40
40
600
112
194
68
52
30
50
3750
50
60
100
140
226
DF-57
57
900
3/4
259
68
52
30
50
5250
71
80
143
200
323
DF-96
96
1370
3/4
380
68
52
30
50
7700
120
144
240
1 336
544
DF-113
113
1575
1
427
68
52
30
50
8655
142
1 160
286
1 400
1 646

F-701 P
Page 3
SERIES 'DF' FILTRATION SYSTEMS
TO ORDER, use Price Code Number
FILTER
SERIES S
SERIES SS
SERIES CPP
SERIES PP
AREA
(SQUARE
MODEL
PRICE
MODEL
PRICE
MODEL
PRICE
MODEL
PRICE
FEET)
CODE NO.
CODE NO.
CODE NO.
CODE NO.
1.5
DFS-1.5-S
49-1414
DFS-1.5-SS
49-1413A
DFS-1.5-CPP
49.1139
DFS-1.5-PP
49-1415
4
DFS-4-S
49-1000
DFS-4-SS
49-1038A
DFS-4-CPP
49-0059
-
-
8
DFS-8-S
49-1003
DFS-8-SS
49-1040A
DFS-8-CPP
49-0060
-
-
11
DFS-11-S
49-1006
DFS-II-SS
49-1042A
DFS-II-CPP
49-0061
15
-
-
-
-
DF-15-CPP
49-0062
-
-
16.5
DFS-16.5-S
49-1007
DFS-16.5-SS
49-1043A
-
-
-
-
19
DF-19-S
49-0015
DF-19-SS
49-0048A
DF-19-CPP
49-0064
24
OF-24-S
49-0018
DF-24-SS
49-0050A
DF-24-CPP
49-0065
27
DF-27-S
49-0021
DF-27-SS
49-0052A
DF-27-CPP
49-0066
-
-
29
DF-29-S
49-0024
DF-29-SS
49-0054A
DF-29-CPP
49-0067
-
-
40
DF-40-S
49-0027
DF-40-SS
49-0056A
I DF-40-CPP
49-0068
-
-
57
DF-57-S
49-0030
DF-57-SS
49-0058A
DF-57-CPP
49-0069
-
-
96
DF-96-S
49-0074
-
-
-
-
113
DF-113-S
49-0075
-
-
-
-
-
-
ORDER DISPOSA-FABRIC MEDIA SEPARATELY, use Price Code No.
-13' WIDTH'
.1612'
WIDTH' (LOTS OF 2-ONLY)
33' WIDTH'
-50' WIDTH'
MOP.
MICRON
YAfl05
PRICE
WEIGHT
YARDS
'PRICE
WEIGHT
YARDS
PRICE
WEIGHT
YARDS
PRICE
WEIGHT
O
z
NO. ..
PER
CODE N0.
PER
CODE N0.
(LBS)
PER.
CODE NO.
(LBS)
PER
CODE N0.
(LBS)
m'
ROLL-
(LBS)
- 0
L
of
SF-W125
125
100
49-0257;1B
. 2.
500
494109010
- 11.5'
500
49-0091 IS
23
500.
494H19248
35-
o
SF-W105
105
100
' 49-0258 18
2
500
49-0093`18'
- 11.5
Soo
49-M 18
23
500'
49.0095-1B
" 135
y
SF-W090
90
•100
49-0259 18
2
500
49,016518
12o
Soo
49-0166 1B
23
500,
49-0167-IB
35
�'.
SF-W080r�2
'100 •
' 49-0260 B.
2
500
49-OM 8
9.0.
500
�49-0100 B
18
S00
49-01019
27
0
SF-W055
100
490262 B
2
500
. 494105 B.
-- .10.5
500
49-0106 8
21
Soo
49-0107B
.. 32
a
SF-W040
100
"4&0263 B
2
500
: 49-0108 B
12D
500
494109 B .:
24
500
49'0113B
• 36
'=
w
SF-WO25-
100
49-0264 B
2
500
49-0111 B
14.5
500
49-01128
29
500
49-01138
44
f
SF-W020
100..
49- 2
500
49-00708
18.0
500
4941071B
36
500
49.0072E
55
SFWOfO
50
49-0266 B
2
200
49-0114If
14.0'
- 200
49-0115 B
28
200
49-0143SF.W005
50
49 W67 B
2
200
49-0117 B
17.5
200
4MI18 8
35
200
49.0119B
53
SF-W001
50
200
49-0120 B
27S
200
49-0121 B
55
200
49-0122B
B4
SF-NO8D
100
49-0269 B
2
50049-13
3 B
9.0
500
49-0124 B
IS
500
49.01258
27
SF-ND40
100
49-0270 B
2
500
49-0126B
12.0
500
49-0127 B
24
500
49-0128B
36
SF-NO10
1 50
49-0271 8
2
200
49-0129 B.
15.5
.: 200
49-0130 B
31
200
49 0131 B
47
Add width to Model No. -Example: SF-W 125-13' See Flow Rate Chart and Micron Selection Guide on page 4.
I OPTIONAL EQUIPMENT I
DESCRIPTION
PRICE CODE NO.
FLOAT ACTIVATED LEVEL CONTROL SWITCH FOR RESERVOIR PUMP
(pilot
NEMA 3 watertight. For single phase motors to 11h HP ® 115V or 2 HP ® 23OVAC. Used as a
49-0162
device on three phase magnetic motor starters. Complete with float ball and mounted in reservoir
tank for pump -down operation. Separate motor starter is required for 3-phase motor (see belolL).
RESERVOIR PUMP INSTALLATION AND WIRING
49-0173
MOTOR STARTER FOR RESERVOIR PUMP
3 phase with transformer and 24VAC control circuit
O.MS3P-S
1 phase with transformer and 24VAC control circuit
O-MS1 P-S
EDGE SEALS
EPDM
SILICON RUBBER
OO'F max.
300°F max.
9-0500 A
49-0500 B
Models 1.5 - 8
Models 11 - 16.5
9-0651 A
PADDTO
49-0651 B
CONVEYOR BELTS
ADD TO
For Series DF-19S through DF-113S (Standard belts are galvanized steel.)MODEL
PRICE CODE NO.
-304
B
304 stainless steel
316 stainless steel
-316
C
See page 4 for reservoir pumps.

F-701P
Page 4
SERIES 'DF" FILTRATION SYSTEMS
RESERVOIR -PUMPS ,11V1 IIIJx0116Y7 ,
FLOW
HORSEPOWER
CASTIRON
POLYPROPYLENE
CPVC
GPM @ TDH (ft.)
Cl
PP 8 CPVC
MODEL
PRICE
CODE NO.
MODEL
PRICE
CODE NO.
MODEL
.PRICE
CODE NO.
5
11
1/15
1/5
SCI1.5
49-0149
OL50
39-9111 A
OV50
39-9212 A
15
- 11
1/4
1/3
SC14
49-0150
OL75
39-9121 B
OV75
39-9222 B
24
20
1/2
1/2
SCI B
49-0151 .
OL100
39-9131 C
OV100
39-9232 C
40
24
3/4
3/4
SCI 15
49-0153
OL100
39-9131 D
OV100
39-9232 D
75
20
1
2
SC124
49-0156
OL125
39-9141 N
OV125
39-9242 N
115
35
2
2
SC129
49-0158 A
EHP2
45-0623
EHC2
45-0123
145
25
3
5
SC140
49-0159
EHP5
45-0645
EHC5
45-0145
200
35
5.
7-1/2
SCI 57
49-0160 A
—
—
EHM2
45-1211
NOTE: '1/15 HP to a HP motors are 1 phase, 1 HP and up ate 3 phase.
3 phase motors require a separate motor starter.
FLOW RATE. FABRIC SELECTION
sop
105 125 t—FABRIC MICRON
RETENTION
80R
.-
...
' I
55
Ni
�P
lit
2511
5
I
it;,.'
+.Ie�
0
0 10 - 20 30 40 50 60 70 80 CKS
WATER 75 100 150 200 300 SSU
SIZING INSTRUCTIONS:
1. Select the desired micron retention
fabric from the chart above.
2. Using the Flow Rate chart on the
preceding page, determine the flow
per square foot for the selected
viscosity and fabric.
3. Divide the total flow (GPM) you
desire by the number obtained in
step 2. The resultant is the size, in
square feet of filter area your
Automatic Fabric Filter should
have.
APPLICATION '' - -
MICRON SELECTION GUIDE
105
90
-80
55
-40 1
25
10
5
1
--'125
Paint spray booth - water'
•
�'
•
'.•
•
Zinc 8 iron phosphating
•
•
•
•
Caustic washing solutions
•
•
•
•
•
•
•
Waste treat - metal hydroxide
.y
•
•
• .
•
Grinding -steel -
•
•
•
•
•
•
•
•
Grinding -cast iron
o
•
•
•
•
•
•
Grinding -aluminum
•
•
•
•
•
•
Grinding -carbide
o
�+
•
Belt grinding -steel
•
•
•
•
•
•
•
Bell grinding - zinc
w
a
•
•
•
•
•
Grinding - hard plastics
•
•
•
•
Grinding -soft plastics
3
•
Grinding - steel roll
•
•
•
•
•
Grinding - brass
•
•
•
•
•
•
rin Ing- ronze
•
•
•
•
Grindin -aluminum
•
•
•
•
•
•
•
Lapping (0030-100)
•
•
•
•
.•
Honing 0120-100
0
,0o
•
•
•
•
•
Quenching
•
•
•
•
•
Grinding -steel
00,
0
•
•
•
•
Belt grinding - steel
•
•
•
•
•
•
•
•
Belt polishing -zinc copper
Belt grinding - steel
•
•
•
Thread grinding -steel
�r�
o�y
•
•
•
Flute - tap die grinding
•
•
•
Crush 8 form grinding
t
•
•
•
Machine tool
U
turning/milling
•
•
•
•
•
N
Specifications subject to change without notice. Registered Trademark: Delrm - DuPont
® DISTRIBUTED BY
3Q 0} �z�
2900 MacArthur Blvd. 847-559-1777
Northbrook, IL 60062-2005 U.S.A. 800-323-5431
,g e-mail: salesCserfilco.com FAX: [phone]
www.serfilco.com

z
t2WJ QV
SERIESAS,
B9andCandC9
METERING PUMPS
Programmable electronic metering
pumps feature highly accurate
microprocessor control, employing
aclearLiquid Crystal Display (LCD)
and a 4-key tactile keypad.
BULLETIN
SERIES W,'I3' &'C' NOV' 00,
METERING PUMPS
Precise chemical addition for:
Cooling towers, Boilers, Plating,
Condensers, Rust inhibitors,
Waste treatment, Water treatment,
Biocides and pH/ORP adjustments
• Wide model selection
• Capacities to 25 GPH
• Choice of control options
• Standard and optional liquid ends to meet any application
• Encapsulated electronics
Pump electronics are enclosed in housing of corrosion -
resistant polypropylene, protecting the pump from spilled
chemical and corrosive atmosphere.
• Pump status LED
Provides visual indicator of pump operation.
• Capable of handling —
Acids SoapsWetting Agents
Caustics Brighteners Inhibitors
Flocculents Detergents `Filter Aids -
Chlorine Dyes and many more
• Inherent pressure relief
Should the back pressure exceed the strength of the
magnetic force developed by the power coil, the pump will
stop stroking, preventing any damage and eliminating the need
for a pressure relief valve.
• Saves you money
Power used only during discharge portion of each stroke.
Minimum electrical consumption and low heat.
• Low maintenance
One moving unit, the armature -diaphragm assembly.
No lubrication required. Modular construction provides
easy replacement of components and major assemblies.
• Free installation kit included
Contains essential components for installation:
Polyethylene suction & discharge tubing
Foot valve & strainer
Injection check valve
• UL listed . CE compliant

BULLETIN
® SERIES 'WPH' A-312B ,
pH/ORP CONTROLLERS
For use in the addition of acids and bases to plating solutions, neutralization of waste
streams, chemical reactions, cooling tower and boiler feed preparation, process control
monitoring and recording.
'WPH' Series pH/ORP on-line process controllers
will improve your treatment performance. Micro-
processor -based, with a very easy -to -use menu
format,'WPH' Series controllers measure in pH or mV
accurately and reliably. A versatile output configura-
tion allows you to program up to four outputs in a va-
riety of ways — with just one controller.
0
Ful
FEATURES
• An In -range output option is perfect for control-
ling a solenoid valve to dump a batch treatment
tank when the pH is within limits.
• An Out -of -range alarm isuseful in waste treatment
applications to alert you that the pH is too high or,
too low.
• Our,digital input for a flow switch may be used In
flow -through applications such as cooling tower
chlorination', preventing chemical feed based on
a stagnant sample.
• Input for level switch can prevent control of an
empty, batch tank..
BENEFITS y '
• Improve treatment performance
• Measure pH or mV
• Easy to install
• Simple to operate
'WPH' Series controllers are available with either
on/off mechanical relay outputs or direct pulse pro-
portional control for metering pumps. Installation is
as easy as unpacking the unit, mounting it and
plugging it in. We also offer other wiring options to
fit your requirements.
EJ
C
PROCESS CONTROL WASTE STREAM WASTE NEUTRALIZATION/ COOLING
MONITORING RECYCLING TOWER

April 1, 2002
Mr. Joe Albiston- Environmental
Division of Water Quality
1628 Mail Service Center
Raleigh, NC 27669-1628
Dear Mr. Albiston,
Specialist
RE: Thomas Concrete Company, Raleigh
This letter is a follow up on our phone conversation from March 28, 2002. Thanks for taking the
time to discuss the issue regarding the Thomas Concrete Company and Pigeonhouse Creek in
Raleigh. Following is a timeline of events that have occurred along Pigeionhouse Creek on
West Street, Raleigh, NC:
2000- Five Points Garden Club adopted a portion of Pigeonhouse Creek to check for
pollution and litter.
2001-Observed Thomas Concrete discharging into.the creek. This occurred often as they
hosed their concrete trucks down possibly everyday. A call was made to the City of
Raleigh's Stormwater department. Was told that the State had jurisdiction and apparently
had the proper permits.
2001-Call was made to the City reporting a "peacock blue" color entering the creek
(upstream from the concrete plant). It was explained that a State of NC building was
draining a fountain that dyes the water blue. It was never explained why the water was
allowed to be drained into the creek eventually going to Crabtree Creek and into the Neuse
River.
March 26, 2002- Observed Thomas Concrete still discharging yucky stuff into the creek.
The water looked fairly clear above the discharge point but after that it was a quagmire of
thick, cloudy green pollution. Phone call was made to Raleigh's Stormwater department.
March 27, 2002- Mark Senior of Raleigh's Stormwater department promptly responded with
names and numbers of DWQ contacts.
March 28, 2002- Phone conversation with Joe Albiston (571-4700) of DWQ. He said they
would made a site visit soon and was in touch with Bradley Bennett (733-5083 x 525)

ApriIA 2002- Received phone call from Charles Brown (571-4700) saying.they had made
(he site visit to Thomas Concrete and found that they had not been keeping proper records.
They are in the process of requiring them to filter out the pollutants. It was a little unclear to
me exactly what the timeframe is, what they are required to do or if they would be issued a
permit. I anticipate seeing something built on site to change the situation. Mr. Brown said he
would keep me informed.
R ards,
'Bev
Bev Norwood
300 Duncan Street
Raleigh, NC 27608
[phone]
NDESIGNOBELLSOUTH. NET
CC: Mark Senior
Bradley Bennett
Charles Davis

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Thomas Concrete Of Carolina, Inc.
West Street Plant
March 29, 2002 Observations
Pigeon House Creek pH 7.8 C Y —►pH 10.8
Sampled 3011. above pipe Sampled 15 feet below pipe