NC0079758_Regional Office Historical File Pre 2018 (2)

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue, Governor Coleen H, Sullins, Director
May 13, 2010 MAY
Mr. Jerrell G. Cook
Airgas National Welders
P.O. Box 31007
Charlotte, N.C. 28231
Dee Freeman, Secre
Subject: Rescission of NPDES Permit NC0079758
National Welders Supply Company
Mecklenburg County
Dear Mr. Cook.
Division staff has confirmed that the subject permit is no longer required. Therefore, in
accordance with your request, NPDES Permit NC0079758 is rescinded, effective immediately.
If in the future your company wishes to discharge wastewater to the State's surface waters, you
must first apply for and receive a new NPDES permit. Discharge of wastewater without a valid
NPDES permit will subject the responsible party to a civil penalty of up to $25,000 per day.
If you have questions about this matter, please contact Charles Weaver of my staff at the
telephone number or address listed below.
cc. Central Files
Mooresville Regional Office / Mike Parker
NPDES Permit file
Fran McPherson, DWQ Budget Office
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Internet: www,nrwaterquality.org
Phone: [phone] FAX [phone]
[e-mail]
�
One hCaroIina atuQ%
aFe�y
An Equal Opportunity/Affirmative Action Employer — 50% R
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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen FL Sullins Dee Freeman
Governor Director Secretary
October 21, 2009
Mr, Derrell G. Cook
National Welders Supply Co Inc
5313 Old Dowd Rd
Charlotte, NC 28208
Subject: Renewal Notice
NPDES Permit NC0079758
National Welders Supply Co
Mecklenburg County
Dear )ermittee:
Your NPDES permit expires an June 30, 2010. Federal (40 CFR 12,2.41) and North Carolina (15A
NCAC 2.110105 (e)) regulations state that permit renewal applications must be filed at least 180 days prior
to expiration of the current permit. If you have already mailed your renewal application, you may
disregard this notice,
Your renewal package must he sent to the Division postmarked no later than January 1, 2010.
Failure to request renewal by this date may result in a civil penalty assessment. Larger penalties may be
assessed depending upon the delinquency of the request.
If any wastewater discharge will occur after June 30, 2010, the current permit must be renewed,
Discharge of wastewater without a valid permit would violate North Carolina General Statute 1.43-215,1;
unpermitted discharges of vs,istewater may be assessed civil penalties of up to S25,000 per day.
Hall wastewater discharge has ceased at your facility and you wish to rescind this permit, contact
me at the telephone .number or address listed below.
1.1se the enclosed checklist to complete your renewal package. The checklist identifies the items you
must submit with the permit renewal application. If you have any questions, please contact me at the
telephone number or e-mail address listed below.
cc: Central Piles
Mooresville Regional Office, Surface Water Protection
NPDES File
Sincerely,
/
tr,t 11,A,40
Charles IL Weaver, jr.
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 276991617
512 North Salisbury Street, Raleigh, North Carolina 27604
Phone, 919 807-6391 / FAX [phone] / charlesveaver@nodenrgov
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
ne
North Carolina
Naturally

NPDES PERMIT NC0079758
NATIONAL WELDERS SUPPLY CO
MECKLENBURG COUNTY
'I lie n; mean s ire REQUIRED for all renewal paclages:.
A cover letter requesting renewal of the permit and docurrrenung tarry changes at the facility. since
issuance of the last permit. Submit one signed original and two copies.
I°he completed application form (copy attached), signed by the permittee or an uthorizecl
Representative. Submit one signed on§girnal and two copies_
if an Authorized Representative (such as a consulting engineer or envirornrnerntal consultant) prepares
the renewal package, written documentation must: be provided showing the authority delegated to any
such .F\.uthorized Representative (see Part II.I3.1 Lb of the existing NPDES permit)
A narrative description of the sludge management plan for the facility. Describe how sludge (or other
solids) generated during wastewater treatment are handled and disposed. If your facility has no such
plan (err the permitted facilit:l° does not generate any solids), c:plaitn this in writing. Submit one signed
original and two copies.
follca�ving items must be submitted by any AiMunicipal car .lndustri 1. facilities discharging
ess yvastewater:
dustnal fttciliues classified as Pritraary It. dustries (see Appendices ,A-D to Title 40 of the: Code of Federal
s, Part 122) and ALL )!.Municipal facilities with a permitted flow 1.0 MGD must submit a
utant Analysis (PPA) in accordance with 40 CI R Part. 122.21.
The above requirement does NOT apply to privately owned facilities treat' 100%
domestic wastewater, or facilities which discharge non process wastewater (`:ooli'ng
water, filter backwash, etc.)
Send the completed renewal package to:
Mrs. Dina Sprinkle
NC DENR / DWQ / Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617

Paves Perdue
Gov
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H Sullins
Director
Dee Freeman
Secretary
March 2, 2009
Mr. Randy Miller, Regional Plant Mana
Airgas National Welders
P.O. Box 31007
Charlotte, North Carolina 28231
SUBJECT: Compliance Evaluation Inspection
National Welders Supply Co,, Inc.
Lune Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N.C.
Dear Mr.
On January 30, 2009, Mr, Andrew Martin of the Meek lenburg County Water Quality
Program (MCWQP) conducted an inspection at the subject facThis inspection was
conducted as part of a cooperative working agreement between Mecklenburg County and the
Division of Water Quality. The enclosed report should be self-explanatory.
If you have any questions concerning this report or any other matters, please do not
hesitate to call Ms. Allocco or me at this office,
Sincerely,
'or Robert B. Krebs
Acting Regional Supervisor
Surface Water Protection
Enclosure
Cc: Rusty Rozzelle,. MCWQP
RB KIadrn
FILE: WQ 00797 58Nationa!Wetders09.dr�c
1%.1coresv4 e Regional Office
Locators. 610 East Gunter Ave„,
Phone: i r 04; 663 1661) Fax
r1 n t www.ncvatnrnr a
e 301 Mnoresville, NC 25117
3-150401 Customer Ser F1ce' 1-33 7-623-6748
hf��rt Carolina
Naturally
tprerai Arramarree Avpor Perpc,yer - 57 Rerpaeral7er Post Coesurper ;;rear

United States Environmental Protection :Agency, Washington, DC 20460 Fonn Approved
NPDES Compliance Inspect it n Report 471i OM13 No. 2040-0003
North Carolina Department of Environment and Natural .Resources ,Approval Expires
Division of Water Quality, Mooresville Regional Office NCDENR 7131185
'85
Section A: National Data System Coding
Transaction Code NPDES Permit No. YR'MO/DAY Inspection Type Inspector Facilit3° Type
N 5 'NC0079758 09!01130
Inspection 'Work Days
0,5
Remarks:
Inspector: Mecklenk urg County Water Qua1it Program
Self -Monitoring Evaluation Rating BI Q,1
4 N 'V
Section B: Facility Data
..Reserved...
Entry Time:
Name and Location of Facility Inspected: j 200 PM
National Welders Supply Company, Inc. Exit Time:
Lime Slurry Treatment Facility 1 3:00 PM
531.3 Old. Dowd Road Date:
Mecklenburo County, NC January 30, 2009
Name(s) of On -Site ,Representatives ------Title(s)--------Phone No(s):
Mr, Randy Miller Regional Plant Manager. (704) 644-324.
Eic Wu Senior Consultant/Delta North Carolina
Name and Address of Responsible Official:
Mr, Randy Miller
National Welders Supply Company, Inc.
P.O. Box 31007
Charlotte, NC 28231
P
Records./Reports
)4) 543-3904
Section C:
as 1Evalnated Durin
Flow lvte:tsurement Opera
Permit Effective Date:
December I. 2005
Permit Expiration Date:
June 30, 2010
1 Title:
1 Regional Plant.. Manager
Phone No.
[phone]
ion
Z Self -Monitoring Program Li Sludge Handling;'Disposal
Facility Site Review El Compliance Schedules
f
uent/Rec
as are ra
in
Pretreatment. Program
Z Laboratory Stonmsater
Section D: Summary of Findings/Comments
ed satisfactory unless otherwise indicated. See Attached Sheet(s) for Summary
Signature(s) of Inspector(s):
Andress Martin
EPA Form 3
'Revfi
l Agency/Office/Telephone:
CWQP1(704) 336-4519
gency/Of
CDENR -- Drstsion of Water Qual
Water Protection — Mooresv.ille R
us Editi
s are Obsolete
Contacted?
Yes
tenance fl Sower Overflow
Pollution Prevention
LI Multimedia
❑ Other:.
Date:
February 13, 2009
bruary 27, 2009

GENERAL:
The facility .was last inspected by MCWQP on January IS, 2008, A Compliance
Evaluation Report was last issued on 'February 22, 2008,
PERMIT:
The current permit became effective on December 1, 2005, and expires on June 30, 2010.
The current permit properly describes the facility and appears adequate for the waste stream
being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of three lime -slurry holding tanks, a seepage collection pond, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
The certification classification for NC0079758 requires that the facility have an Operator
in Responsible Charge (ORC) with a Grade I Physical Chemical Water Pollution Control
System (PC-1) certification, The facility is staffed (ORC and back-up) with personnel that
possess the appropriate operator certification. Ms. Angelique Crews (Back-up ORC) is
currently past due on the certification renewal fee, which was due January 1, 2009. Please
ensure that all certification fees are paid before the operator's certification is switched to
"Inactive".
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period January 2008
through December 2008 and appear to he properly completed. Records, reports, and logs are
clear and well maintained. DMRs list no discharges for the year in review.
FACILITY SITE REVIEW:
All of the major components of the facility ‘vere in service and appeared to be operating
properly at the time of the inspection. During the facility walk through white staining was
observed on trees near the unnamed tributary to Taggart Creek. When questioned regarding the
staining the facility's. ORC noted a release of approximately 600 gallons of lime slurry from tank
#1 occurred on January 19., 2009. A frozen pipe that ruptured in a secondary containment area
caused the release. The spill entered the storm drain system and was discharged to the unnamed
tributary but did not reach Taggart Creek. No impacts to the tributary were observed during the
inspection.
The spill was cleaned up by Stanley's Septic and reported to the Mecklenburg County
Water Quality Program on January 19, 2009, but no notification was made to the Division of
Water Quality (permitting authority for wastewater and stormwater permits). As required
by both the wastewater and stormwater permits held by the permittee, Noncompliance
Notification shall be made as soon as possible within 24 hours of first knowledge to the

Reps. inal Office or to the E i
at 1-0--0.
FLOW MEASURE), ENT:
encv a a eme r t ier. on Center nn-business hours
Flow measurement is a crarnpli hed using an effluent V-nritch air, Instanta anus
ekly discharge flow eaten latia n i accrinpIished by measuring the height of water flowing
r the vveir and the duration of the discharge event.
LABORATORY:
The permttec contracts c ith Sheaf` Env nmented Se r $ices, Inc. to perfrarrxr'
par°arnctcr laboratory analyses (NC Laboratory Certification 32) and contracts with Pace
Anal tical aer is s, Inc. (NC Laboratory Certification ) to perform all rather analyses
specified in the permit. Shealy, Environmental Services,, Inc, and face Analytical Sit i s. NA,' -ere not evaluated under this inspection.
EEE L `E tiT/RE EIV NG WATERS:
:
The facility' discharges to an unnamed tributary to *I`a gart Creek,
a.ter within the.Catawba Ri'ei Basin. There N=as no discharge at the time of
The rccciirg -ater did not appear to be adversela afteced by the effluent,
SELF -MONITORING PROGRAM:
ass -C-
c
I)ischar e Monitoring Report (DMRs) s °cd for the peanuary 2008
through December 2008. The reports indicate that the iacilitw raiet permit eft'luent limits and
monitoring requirements during this period. "I°he facilit did not discharge 'wastewater fr the
year in review.
OPERATIONS S MAINTENA IC
The facility and grounds appeared to be properly operated and irit nt irieda 'The et rrrci
-rall operating strategy appears acceptable for the size and type of the tacit

NOWA
°1" l l=' i`f ltt a: Cent
1 a17 Mail Semieetrtcr
Raleigh, Nt 27 -1617
Vt1it i char =fc r itoring Repo
National ` ld r: a pl ° Co.. Inc.
Charlotte, North Carolina, Mecklenburg
nbur
Dear Sir1 f dani:
c1c d please find oil-11 tic°i it a1and c r
4 irrdicati . a wastexttater discharge did
durarr the month of November er 200
I)1 R sub!
required by i atic)rl
any questionsor cot
t lta Envir tarn enta
your cooperation w1
rice
1°:rrclO
fop> crf tfr
toccur°f�
d as requirc°d 'b by NPDES Per i No. . iC,l10791758' rr d a
clderasteater r?rzrtic rr and rr rairrtrrarrc plea.
t, please feel free tc ecarrtacl crux errVirc°orrt rer tl cc rulta
4rigr:
at (70) 5 1-) ){), Ihauk you in advance

�c�rkh C"arolina Department of En
February 22, 2008
Mr, Randy Miller, Regional Plant Manager
National Welders Supply Co., Inc.
Post Office Box 31007
Charlotte, North Carolina 28231.
SUBJECT; Compliance Evaluation Inspection
National Welders Supply Co.., Inc.
Lime Slurry Treatment Facility
NPDES Permit No, NC0079758
Mecklenburg County, N.C.
Iyear Mr. Miller:
Michael F. [aske
W'illrant C:,. Ross Jr., Secretary
r rt�erst and Natural Resources
n H. Sullins, Director
On January 17, 2008, Mr, Andrew Martin of the Mecklenburg County Water Quality
Program (MC'WQP) conducted an inspection at the subject facility. This inspection vas
conducted as part of a cooperative working agreement between Mecklenburg County and the
Division of Water Quality. The enclosed report should be sell" -explanatory.
If you have any questions concerning this report or any other n
to call Ms. Allocco or me at this office.
Robert B. Krebs
Acting I
Surface W'
Enclosure
Cc: Rusty Rozz.elle, i 1CWQP
R BKlad rn
FILE: WQ National Welders.0079758.0108.doc
EINR
gal Supervisor
r Protection
s, please do not
.L(o6reesv Mlle Reg on
1ntemet '. u,1tyw,,, iv
IJiwision of Water Quality
610 Last Center Ave, Suite 301 Mooresville, N(,. 281.
Phone [phone]C9a
Fax [phone]
Quality'
thCarolina
Naturally
Customer Service
I-877-623-6748
An Equal ©pportunitylAtl rma1 we Action Employer — 5©% Recyclecf`tp% Post Consumer Paper

United States Environmental Protection Agency, Washington , DC 20460 Form Approved
NPDES Compliance Inspection Report ATTilrOMB No. 2040-0003
North Carolina Department of Environment and Natural Resources Approval Expires
Division of Water Quality., .Mooresville Regional Office NCDENR 7131/85
Transaction
Section A: National Data System Coding
Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector
5 NC0079758 08101/17
C
Facility Type
Remarks:
Inspector: Mecklenburg County Water Quality Pr °ran
Inspection Work Days Facility Self -Monitoring Evaluation 'Rating,
1.0 5
N N
BI QA
Section B: Facili Data
En.try Time:
'a and Location of Facility Inspected: 10:30 AM
National Welders Supply Company, Inc. Exit Time:
Lime Slurry Treatment Facility 11:30 AM
5313 Old Dowd Road Date:
Mec,klenburg Count, NC Janum 17 2008
,
Name(s) of On -Site Representatives -------Titfe(s)---------Phone No(s):
Mr, Randy. Miller Regional Plant Manager [phone]
Eic Wu Senior Consultant/Delta North Carolina [phone]
Name and Address of Responsible Official:
Mr, Randy Millet
National Welders Supply Company, Inc,
P.O. Box 31007
Charlotte, NC 28231
177 Permit
E Records/Reports
E Facility Site Review
Effli t/R'' .ecein.
Wi
ESignature(s) of Inspeetor(s):
Andrew Martin
- Revtewer:
EPA Form 3560-3 (Revised 3-8.5
,
December 1, 2005.
Permit Expiration Date:
June 30, 2010
Title:
Regional Plant Manager
Phone No. Contacted?
[phone] Yes
Section C:
Areas Evaluated Durin
[E1 Flow Measurement El operations
LJ ,Self -Monitoring Program
0 Compliance Schedules
aintenance n Sewer Overflow
0 Pollution Prevention
0 Multimedia
,aboratory Stormwater 0 Other:
Section D: Summary of Findings/Comments
0 Sludge Handling/Disposal
Li Pretreatment .Program.
I rated satisfactory unless otherwise indicated. See Attached Sheet(s) for Summary
Agency/Office/Telephone:
MCWQP,-[phone]
:
February 21, 2008
-^^
e icy/Office: Date:
CeL...23 NC ENR — Division of Water Quality
ace Water Protection — Mooresville RegionalRegwnal Office February 22,2008
Previous Editions are Obsolete

GENERAL:
The facility was last inspected by MCW P on January 3, 2007,
PERMIT:
The current permit became effective on December 1, 2005, and expires on June 30, 2010.
The current permit properly describes the facility and appears adequate for the waste stream
'being treated,
The portion of the facility associated with the NPDES treatment works and discharge
consists ofa lime slurry holdingpond, two seepage collection ponds, followed by a treatment
pond ‘vhere carbon dioxide is added for p11 adjustment.
The certification classification for NC0079758 requires that the facility have an operator
in responsible charge (ORC) with a Grade 1 Physical Chemical Water Pollution Control System
(PC-1) certification, The facility is staffed, (ORC and back-up) with personnel that possess the
appropriate operator certification,
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2006
through November 2007 and appear to he properly completed. Records, reports, and logs are
clear and well maintained,
FACILITY SITE REVIEW:
All of tile major components of the' facilityere in service and appeared to be operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir, instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water 'flowing
over the weir and the duration of the discharge event.
LABORATORY:
The permit:tee contracts ‘vith Shealy Environmental Services, Inc. to perform field
parameter laboratory analyses (NC I„,aboratory Certification #329) and contracts with Pace
Analytical Services, Inc. (NC 'Laboratory Certification #40) to perform all other analyses
specified in the, permit. Shealy Environmental Services, Inc. and Pace Analytical Services, Inc,
were not evaluated under this inspection.

EFFL TENT CETV INC \ T 2S:
The fact tiarges to an unnamed t tibut r Ica ` ` 1t Creek, , p i l C ass >„
wfwat r within the Catawba River Basin, There was rto discharge at the time at the iris eetion
The receive ng ter did not appear to be adversely ° aft eted by the effluent,
SELF -MONITORING PROGRAM:
l charge Monitoring Reports (l N1Rs) wvere re tie ed for the period Deeet her 2006
through November 2007., The reports indicate that the facility was meeting permit effluent lit
and monitoring requirements during this period. The reports indicate that all paratneters are
being monitored at the, required frequencies and locations.
OPERATIONS MAINTENANCE:
a
The laLility axrd: grounds appeared to be p °serf operated and maintained. `I he curren
operating strttteg = appears acceptable for the siz and type of the facility..

Ms. lls1d
61C)Es
ooi., i isNC
nisi
ORC.
1
Nat'
5313,.i
Chac
7044)4-,- 3 2 4(.)
MA
PALTERS OF CRY E FANG EQ ENT
3 Old Dowd Road
t hadt tt. NC 33303
Phone [phone]
Fax 73d31-3731
uld a11S V1J O F cic cstioll c ncemn
assist ancc
to not hcsitatc to call
s desi e titan as tl
,,)RC
s Supply Co.
Road
'2 8

Mr. Randy .Miller„ Regional Plant Manager
National Welders Supply Co,, Inc,
Post Office Box 31007
Charlotte, North Carolina 28231
SUBJECT:
Dear Mil r:
Michael F. Easley, Governor
Willjarn 0, Ross Jr, Secretary
North Carolina Department et Environment and Natural Resources
January 10, 2007
Compliance Evaluation Inspection
National 'Welders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No, NC0079758
Mecklenburg County, N.C.
Alan W Klimek, P.E. Director
Division of Water Quality
On January 3, 2007, Mr, Andrew Martin of the Mecklenburg County Water Quality Program
(MCWQP) conducted an inspection at the subject facility. This inspection was conducted as part of a
cooperative working agreement between 'Mecklenburg Count.v: and the Division of Water Quality, The
enclosed report should be self-explanatory.
Following the phone conversation on January 1.0, 2007,,with Ms. Marcia Allocco of this Office a
file review was completed to locate any Operator in Responsible Charge (ORC) Designation forms
submitted fir the National Welders Supply facility. The file review found an ORC Designation form
completed by National Welders Supply and dated October 29, 2002. 1-his form designated Ms.
Angelique Crews as the ORC of the National Welders Supply facility. However, after reviewing the form
it was noted that Crews did not have the correct certification (WW1 certification when PC-1 was
required) and therefore., this is probably why Ms. Crews vas not designated as the ORC for the facility by
the Division of Water Quality. Please complete the enclosed ORC Designation form including the
relevant PC-1 certification numbers for Ms. Crews and the Back-up ORC by February 12, 2007. Please
send a copy to this Office and also the address listed on the form.
If you have any questions concerning this report or any other matters, please .clo not hesitate to
call Ms. Allocco or me at this office,
Sincerely,
Samar Bou-Ghazale
Acting Regional Supervisor
Surface Water .Protection
Enclosure
cc Rusty Rozzelle„ MCWQP
SBG, adm
WQ National Welders.0079758.0107,doc
MOOfeSiii Ile Regional Office Division of Water Quality
Internet Yl10l-elltaiitc.2 610 East Center Ave,. Suite 301 Mooresville,. NC 28115
,onc
orthCarolina
717tIturally
Phone [phone] Customer Service
Fax [phone]
An Equal OpportunitylAffrrathre ,Action Employer - 50% Recyc1ed10% Post Consumer Paper

United States Environmental Protection Agency, Washington , DC .20460
NPDES Compliance Inspection Report
North Carolina Department of Environment and Natural Resources
Division of Water Quality, Mooresville Regional Office NCDENR
N.a+ .4.e•
ansaction
N
Section A: National Data System Coding
Code NPDES Permit No,
5 NC0079758
YR/MO/DAY Inspection Type
07101103
ilIMM•11
Form Approved
OMB No, 2040-0003
Approval Expires
7/31/85
Inspector
Facility Type
Inspection Work Days
1.0
Remarks:
InspectMecklenburg County Water Quality Pram
Facility Self -Monitoring Evaluation Rating 131
3
Name and Location of Facility Inspected:
National Welders Supply Company-, Inc.
Lime Slurry -Treatment Facility
53-13 Old Dowd Road
Mecklenburg County, NC
Name(s) of On -Site
1\4r Randy Miller
Angelique Crews
QA
N
Section B: Facility Data
Entry Time:
10:00 AM
Exit Time:
11.00 AM
Date:
January 03, 2007
presentatives No(s):
Regional Plant Manager [phone]
Environmental Specialist Eagle Engineering — North Carolina
Name and Address of Responsible Official:
Mr. Randy Miller
National Welders Supply Company, Inc
P.O. Box 31.007'
Charlotte, NC 28231
Ef Permit
El Records/Reports
E Facility Site Review
Z EffluentReceivin.g Waters.
Permit Effective Date:
December 1, 2005
Permit Expirati
June 30„ 2010
[phone]
Title:
Regional Plant Manager
Phone No.
[phone]
Section C:
Areas Evaluated During Inspection
Measurement Operations & 'Maintenance
Self -Monitoring Program
111 Compliance Sc.hedules
Sludge IlandlinulDisposal
7 Pretreatment Program
Laboratory [11 Stonnwate.
Section D: Summary of Findings/Comments
Contac
Yes
Da
LJ Sewer Overflow
LI Pollution Prevention
1111 Multimedia.
Ei Other:
All areas are rated satisfactory unless otherwise indicated. See Attached Sheet(s) for Summary
Signature(s) of Inspector(s):
Andrew Martin
Signature of Reviewer:
Marcia Allocco
Agency/Office/Telephone:
MCWOP/[phone]
Agency/Office:
NCDENR'D\WQ [phone]
Date:
January 3, 2007
EPA Form 3560-3 (R.evised. 3-85) 'Previous Editions are Obsolete
Date:
anuar19,2007

GENERAL:
The facility was last inspected by MCWQP on December 28, 2005,
PERMIT:
The current permit became effective on December 1, 2005, and expires on June 30, 2010.
The current permit properly describes the facility and appears adequate for the waste stream
being treated,
The portion of the facility associated with the NPDES treatment works and discharge
consists of a. lime slurry holding pond, two seepage collection ponds, 'followed by a treatment
pond where carbon dioxide is added for pH adjustment,
The cenitication classification for NC0079758 requires that the facility have an operator
in responsible charge (ORC) with a Grade I Physical Chemical Water Pollution Control System
(PC-1) certification. The facility is staffed (ORC and back-up) with personnel that possess the
appropriate operator certification.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2005
through November 2006 and appear to he properly completed. Records, reports, and logs are
clear and well maintained.
FACILITY SITE REVIEW:
Allof the major components of the facility were in service and appeared to he operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir. Instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.
LABORATORY:
Shealy Environmental Services, Inc., (NC Laboratory Certification. #329), and Pace
Analytical Services, Inc. (NC Laboratory Certification #40) 'perform all analyses as required by
the perrnit.. Shealy Environmental Services, Inc. and Pace Analytical Services. Inc. were not
evaluated under this inspection.

EFFLUENT/RECEIVINGATL
`he facility discharges ton um awned tributary to Taggart aart .`reef lrich is a Class
water within the Catawba River Basin. There alas no discharge at the time c f the inspection.
The receiving water did not appear to be adversely affected by the effluent,
SELF -MONITORING G PROGRAM:
Discharge Monitoring Reports (l it sl were re iewcd tar the period December 2 0
through November 2006. The reports indicate that the fdeility was meeting permit efflue
and monitoring requirements during this period. ithe reports, indicate that all parameters ar
being monitored at the required frequencies and locutions.
OPERATIONS . MAINTENANCE:
CE:
The facility and grounds appcarec to be proper operated and maintained. m1' current
oVraafl operatingstrategy appears accept,thle for the sire acrid type of the facility.

lu
General :ation:
Perimitta-. tillirier/Officer Na
ET '2 Address: I
City: LVCL
Telephone Ntirri
Snature:
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Facility Name:
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Back -Up Operator in Responsible Charge:
Print Name:
Certificate Type and Grade:
Work. Telephone:
Mail or Fax to:
Social Security #
Signature:
WPCSOCC
1618 Mail. Service Center
Raleigh, N.C. 27699-161S
Cericitilcare
Fax: [phone]

TRANSMISSION VERIFICATION REPORT
TIME : 01/1 °207
NAME
FAX
TEL
SFR,0 BROD057
DATE,TIME 01 10 25F
FAX NO./NAME 1919733133E
DURATION E1: EE: 3
FAE) 01
RESULT OK
MODE STANDARD
ECM

MAJOR SUPPLJEFIS OF CRYOGENICS AND WELD EQUIPMENT
P.O. Box 3-1007
Charlotte, NC 26200 -6098
Phore 704/333-5475
Fax 704P342-0200
November —, 2005
NC DENR Division of Water Quality
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: Waste Water Treatment Operator Designation(s)
National Welders Supply Co., Inc.
Charlotte, North Carolina, Mecklenburg County
NPDES No, NC0079758
Dear Sir/Madam.:
Enclosed please find a completed Water Pollution Control System Designation Form
indicating the Operator in Responsible Charge (ORC) and the back-up ORC for National
Welders Supply Co., Inc. as Angelique Y W. Crews and Randall Rhoades, respectively.
Please note that while National Welders Supply Co., Inc. is classified as a Grade
Physical/Chemical waste water treatment facility, the designated ORC and back-up ORC
hold valid WWT certifications higher than the grade level of the facility, specifically,
Grade II -Conditional and Grade II, respectively.
If you have any questions or comments, please feel free to contact our environmental
consultant, Delta Environmental Consultants, Inc., at [phone], Thank you in
advance for your cooperation with this matter.
Sincerely,
Regional Plant. Manager
Enclosures

A r Michael F, Easley, Governor
William G. Ross Jr., Secretary
North Carolina department of Environment and Natural Resources
C. L. Gobble, Vice -Chairman
Water Pollution Control System Operators Cerauf'ication Commission
October 25
TERRELL G. COOK
NATIONAL "(WELDERS S IPPY C(, INC
PO BOX 31007
CHARLOTTE, NC 28231
Subject: Designations for Backup Operator in Responsible
National Welders Supply Company, Inc, -Charlotte
Facility Classification: Physical/Chemical Grade I.
Permit No.: NC0079758
Mecklenburg County
Dear Mr. Cook:
er Treatment Facility
The Division of Water Quality ()WQ) is in the process of reviewing and updating information contained
in our database known as BINS (Basinwide Information Management System). This review indicates
that National Welders Supply Co., Inc. Permit No.: 0079758 has not designated at least one operator as
Backup Operator in Responsible Charge (backup ORC). While your designated O.RC, Angelique W,
Crews, is properly certified, you rust designate at least one Backup ORC for the facility.
Each classified. facility must designate one ORC' with Certification at or above the grade of the facility
and a minimum of one backup ORC who muss[ hold a valid certificate of the same type and no more than
one grade lower than the classification of the facility. You may designate multiple backup ORC's, but
they must all hold valid certification at the appropriate grade. Failure to designate a properly certified
Backup ORC or notify of changes constitutes a violation of the permit issued for this facility.
Please submit er
November 30, 2(
sed form confirming designation of current ORC and designating a Backup ORC by
W PCSOCC,
1618 Mail Service Center
Raleigh, NC 27699 1618,
Form may be faxed to (9,119) 733-I338.
If you have any questions concerniaag this request, pl
reference our website at htq?://h2o,statenc.us/taeu,
Jerry F. Rimier, Supervisor
Technical Assistance & Certification Unit
cc:
Central Files
Technical Assistance & Certification Unit
Service Center, Raleigh, NC 27699-1618
DENR Customer Service Center
An Equal Opportunity Action Employer
me at [phone] ext. 309 or
Internet http://h2o,enr.state.nc,us/tacu/index.html
Telephone [phone] Fax [phone]
Telephone [phone]
50% recycled/10% post -consumer paper

wastev%.ater Plant
Physical/Chemical
Collection System
Operator in Responsible Charge:
Print Na :(
Certificate .Type and Grade:
Work Telephone:cLj
,.
Water Pollution Control System Designation Form
WPCSOCC
NCAC I5A:08G .0201
General Information:
Pf,7711jEt2C Oirvilr/OffiCer Narne'
Mailing Address,:
City: fi
Telephone
Signature:
Date:
Facility Information:
Selitta Ittois.1014 ilf****-11111*Stillit*OV01$1111tiltu
Facility Na.rne:
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t SUBMIT A SEPARATE FORM FOR EACH TYPE OF SYSTEM !
k (NI Tv f
Mark (X) T c
Spray irrigation ,
' and Application
„X.,. Social Security # 7:5 -
- 1-1 2 Signature:
Back -Up Operator in Responsible Charge:
Prin,: Name:
Certificate Type and Grade:
1.Vork Telephone:
WPCSOCC
1618 Mail Service Center
Raleigh, N.C. 27699-1618
Certificate ft'
Fax [phone]

TRANSMISSION V'ERIFICATTON REPORT
TIME : 06/21/2004 09:46
NAME : PRODUCTION
FAX : [phone]
TEL : [phone]
DATE, TIME
FAX NO./NAME
DURATION
PAGE(S)
RESULT
MODE
06/21 09:45
19197331338
00:00:25
01
OK
STANDARD
ECM
Uh5 CORP
Pollution Control System ORC Designation Fbrm
wPCsoCC
NCAC ISA:08G .O2Oi
City;
Telephone Nun'be
Signature.
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PAGE 04
f■'■/lf/ ri•r
R:ctr-[ In Onermter in Restxsnsible mac:

The State of North Carolina
Water Poll tion Control System Operators Certification Commission
hereby certifies that
.Randall. Wilson Miller
has met the requirements for certification established by the Certification Commission
lacXrsraat t to Article 3, Chapter 90A, of the North Carolina General Stitt tes as a
Grade 1 Physical/Chemical Water Pollution Control Syste Operator
Paul E. Rawls, Chaim pan o[Cotnrnission
Certificate Number 9 9ti12
Certificate Issued l ece i er 14, 2006

704 282 4232 TO 7045220063
11.57 FR EAGLE
me ter Pollution Contr rl System Operators Certification
hereby certifies that
Angelique Weyriek Crews
has met the muniments cements for ccrtific-atioa r tabus led by thi Certification Cnrniingsion
pursuant to Ankle 3, Chapter 90A, attic Noith Carolina Gemini Statutes as a
Conditional Grade 2 Physical/Chemical Water Pollution Control System Operator
This certificati©rt is apfilic ble for the following facility_
Supply Company, Inc., 5301 Oki Dowd Road, Charlotte, North Carolina
Chailit�l Cert#tlitl ClT3nl13sion
C'ertiCicate Number- 985491.
i't?rtificate Issued 1)ceern er •12, 20(]

Mr, Randy Miller, Regional Plant Manager
National Welders Supply Co., Inc,
Post Office Box 31007
Charlotte, North Carolina 28231
SUBJ
Dear Mr. Miller:
Michael E. Easley, Go •
William G Ross ir Secretary
'North Carolina Department of Environment and Natural Resources
January 10, 2007
Compliance Evaluation Inspection
National Welders Supply Co., Inc.
1 Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N,C.
,klan W„Kinek, P.E. Director
Division of Water Quality
On January 3, 2007..Mr, Andrew Martin of the Mecklenburg County Water Quality Program
(MC'WQP) conducted an inspection at the subject facility, This inspection was conducted as part of a
cooperative working agreement between Mecklenburg County and the Division of Water Quality, The
enclosed report should he self-explanatory.
'Following the phone conversation on January 10, 2007, with Ms, Marcia Allocco of this Office a
file review' was ,completed to locate any Operator in Responsible Charge (ORC) Designation forms
submitted for the National Welders Supply facility. The file review found an ORC Designation form
completed by National Welders Supply and dated October 29, 2002. This form designated Ms.
Angelique Crews as the ORC of the National Welders Supply facility. However, after reviewing the form
it was noted that Ms. Crews did not have the correct certification (WW-1 certification when PC-1 was
required) and therefore, this is probably why Ms, Crews was not designated as the ORC for the facility: by
the Division of Water Quality. Please complete the enclosed ORC Designation form including the
relevant PC-1 certification 'numbers for Ms. Crews and the Back-up ORC by February 12, 2007..Please
send a copy to this Office and .also the address listed on the form..
If you have any questions concerning this report or any other matters, please do not hesitate to
call Ms. Allocco or me at this office..
Sincere]
Samar Bou-Ghaz,ale
Acting Regional Supervisor
Surface Water Protection
Enclosure
cc: Rusty Rozzelle, MCWQP
SBG/adm
WQ National Welders 0079758.0107doc
Mooresville Regional Office Division of Water Quality
Internet ,%2vw w aierqualu 010 East Center Ave, Suite 301 Mooresville, NC 28115
nc
NoOrthCarolitta
Naturally
Phone [phone] Customer Service
Fax [phone]
An Equal Opporturfrty/Affrmative Action Employer - 50% Recycled/10°6 Post Consumer Paper

Transaction
N
United States Environmental Protection Agency, Washington, DC 20460 „ Fomi Approved.
NPDES Compliance Inspection Report AIVA OMB No. 2040-0003
North Carolina Department of Environment and Natural Resources
Division of Water Quality, Mooresville Regional Office
Section A: National Data System Coding
Code NPDES Permit No,
5 NC0079758
Inspection Work Days
1,0
YR/MO/DAY
07/01/03
••••.01.01L
fricPPIR
Inspection Type Inspector
Remarks:
Inspector. Mecklenburg County Water alit Program
Facility Self -Monitoring Evaluation Rating BI
Name and Location of Facility Inspected:
National Welders Supply Company, Inc.
Lime Slurry Treatment Facility
531.3 Old Dowd Road
Mecklenburg Count NC
3
Section : Facility Data
e(s) of On -Site Representatives -------Title(s)--------PhoneNo(s):
Mr. Randy Miller Regional Plant Manager [phone]
Ang.elique Crews Environmental Specialist/Eagle Engineering --- North Carolina
Entry Time:
10:00 AM
Exit Time:
1:00 AM
Date:
anuary 03, 2007
Name and Address of Responsible Official:
1,r, Randy Miller
National Welders Supply Company,. Inc.
P.O. Box 31007
Charlotte, NC 28231
E Pe
N Records/Reports
Facility Site Review
E ffluentRcceiving Waters
ection C:
Areas Evaluated Durin
Flow Measurement
QA
N
Approval Expires
7/31/85
Facility' Type
2
Permit Effective Date:
December 1, 2005
Permit Expiration Da
June 30, 2010
(704) 882-42
Title:
Regional Plant Manager
Phone No.
[phone]
ction
Operations & Maintenance
Z Selr-Nlonitoring Program El Sludge Handling/Disposal
El Compliance Schedules Pretreatment Program.
Laboratory Stormwater
Section D: Summary of Findings/Comments
Contacted?
Yes
LJ
Sewer Overflow
Pollution Prevention
El Multimedia
fl Other:,
All areas are rated satisfactory unless otherwise indicated. See Attached Sheet(s) for Summary
Signature(s) of lnspector(s): Agency/Office/Telephone:
Andrew Martin.
Signature of Reviewer:
Marcia Allocco
EPA Form 3560-3 (Revised 3- 5
MCWQP/[phone]
Agency/Office:
.NCDENR/DWQ [phone]
.„„
.vious Editions are Obsolete
Date:
January 3, 2007
Date:
9, 2007

GENERAL:
The facility was last inspected by .MCWQP on December 28, 2005.
PER HT:
The current permit became effective on December 1, 2005, and expires on 'June 30, 2010.
The current permit properly describes the facility and appears adequate for the waste stream
being treated..
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime slurry holding pond, two seepage collection ponds, followed by a 'treatment
pond where carbon dioxide is added for pH adjustment.
The certification classification for NC0079758 requires that the facility have an operator
in responsible charge (ORC) with a Grade 1 Physical Chemical Water Pollution Control System
(PC-1) certification. The facility is staffed (ORC and back-up) with personnel that possess the
appropriate operator certification.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2005
through November 2006 and appear to be properly completed. Records, reports, and logs are
clear and well maintained.
FACILITY SITE REVIEW:
All of the major components of the facility were in service and .appeared to be operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurementis accomplished using an effluent V-notch weir. Instantaneous
weekly discharge now calculation is accomplished by measuring the height of water 'flowing
over the weir and the duration of the discharge event,
LABORATORY:
Shealy 'Environmental Services, Inc., (NC Laboratory Certification #329), and Pace
Analytical Services, Inc. (NC Laboratory Certification #40) perform all analyses as required by
the permit. Shealy Environmental Services, Inc. and Pace Analytical Services, Inc. were not
evaluated under this inspection.

EFFLUENT ECEI'I % TERS:
The facility discharges to an umlauted tributary to Taggart Creek, which i a Class
water within the Catawba River Basin. `l'here was no discharge at the time of the inspection.
The receiving water did not appear to be adversely affected by the effluent;
SELF -MONITORING PROG
Discharge Monitoring Reports DMl s) were reviewed for the peri d December 2005
through November 2006, The reports indicate that the facility was meeting permit effluent Emits
and monitoring requirements during this period, The reports indicate that all parameters are
being monitored at the required frequencies and "locations,
OPERATIONS & MAINTENANCE:
The facility and grounds appeared to be properly operated and maintained "f he ent
overall operating strategy appears acceptable for the size and type of the facility.

Water PoPollutionControl l signa on Form
PCcCc
NCAC I ;: G .0201
General Infonaut
Permitter Owner,
l Mailing Address:
e
Nazi
City.
1"e
Signature:
Facility Information;
Permit un-rbur:
State Zip:
County
Date:
' SUBMIT A SEPARATE FORM FOR EACH TYPE OF SYSTE
dark_ X) Type of Fact Class 1 4)
Wastewater ater Plant
Physical/Chemical
Collection ''sterna..
Operat iu Rep nsibl
Print
Certificate Type anal Grade:
hard:
Work Telephone: If
Spray Irri,at.i
Land Application
Subsurface
. R ■ R ■ RIM*
Social Sceu
ate
Bach-1 JP Oper°ator° in Resp n sible C har° e
Print Name:
Certificate Type and Grade:
Work Telephone:
Mail or Fax t::
gnature:
Clash
NA
NA
NA
■.
Social Security
Signature
WIP( OCC
1618 Mail Service Center
Raleigh, ?' :C.27699-1618
Fax [phone]
CerYtific;
?d

Mr. Randy Millr, Regional l `lant a
National nal Welders Supply Co., Inc.
Post Office Box 31007
Charlotte, North Carolina 28231
Tear
nary , 2006
SUBJ T: Coinpliance Evaluation inspection
National Welders Supply Co.,
Lime Slurry Treatment 1acidy
PDES Permit No. I C0 7 7 5
Mecklenburg County, N.C.
n December 28, 2005, Mr.. David Rimer of the IVIecklerthurg County`water Quality'
Program l i P) conducted an inspection at the subject facility. This inspection was
conducted as part of a cooperative working agreement between Mecklenburg County, d the,
Division of Water Quality. The enclosed report should he self-explanatory.
I1 you have any questions condermng this report or arty other afters please
hesitate to call 1r. Richard bridge an or me at this office.
Enclosure
cc: lusty, Rozzede rP
DR /dj
Sincerely,
1 . Rex Gleason, P.E.
Surthce afar Protect aregional Supervise

,,E©s�„�@ United States Environmental Protection Agency, Washington , DC 20460
r A tiOPPrir.'
NPDES Compliance Inspection Report
North Carolina Department of Environment and Natural Resources -
Division of Water Quality, Mooresville Regional Office D
Form Approved.
OMB No. 2040-0003
Approval Expires
7/31 /85
Section A: National Data System Coding
Transaction. Code NPDES Permit No. YR/MO/DAY Inspection Type Inspector Facility Type
N 5 NC0079758 05/12/28 C C 2
Remarks:
Inspector: Mecklenburg County Water Qua
y
ora.
Inspection. Work Days Facility Sell -Monitoring Evaluation Rating BI QA
1.0
3 N N
Section 1: Fa
Name and Location of Facility Inspected:
National Welders Supply Company, Inc.
Lime Slurry Treatment Facility
5313 Old Dowd Road
Mecklenburg County, NC
Entry Time:
10:00 AM
Exit Time:
I 1:30 AM.
Date:
December 28, 2005
Name(s) of On -Site Representatives-------Title(s)--------Phone No(s):
Mr. Randy Miller Regional Plant Manager 704-644-3249
Mr, Eric Wu, PE Environmental ScientisCURS Corporation North Carolina
Permit Effective Date:
December 1, 2005
Permit Expiration Date:
June 30, 2010
704-522-0330
Name and Address of Responsible Official:
Mr. Randy Miller
National Welders Supply Company, Inc,
P.O. Box 31007
Charlotte, NC 28231
Title;
Regional Plant Manager
Phone No.
704-644-3249
Contacted?
Yes
Seetton C:
Areas Evalnat
Permit
Records/Reports
Facility Site Review
vtng wa
Flow Measurement Operations Maintenance U Sewer Overflow
Self -Monitoring Program 0 Sludge Handling/Disposal © Pollution Prevent
0 Compliance Schedules L Pretreatment Program © Multimedia
Laboratory ©Stortttwater ❑ Other;
Section D: Summary of Findings/
All areas are rated satisfactory unless otherwise indicated. See Attached Sheets) for Summary
Signature(s) ©f Inspector(s):
David J. Rimer
Agency/Office/Telephone:
MCWQPI(704) 336-5500
January 3, 2006
Signature of Reviewer:
Agency/Office
a
EPA Forth 560-3 (`Revised 3-851 Previous Editions are Obsolete

GENER AL:
The facility was last inspected by MCWQP on June 7, 2004. A Compliance Evaluation
Inspection report was issued on June 30, 2004.
PERMIT:
The current permit became effective on February 1, 2002 and expires on June 30, 2005.
The permittee will submit the permit renewal application prior to 180 days before the expiration
of the current permit. The current permit properly describes the facility and appears adequate for
the waste stream being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime slurry holding pond, two seepage collection ponds, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2003
through November 2004 and appear to be properly completed. Records, reports, and logs are
clear and well maintained.
FACILITY SITE REVIEW:
All of the major components of the facility were in service and appeared to be operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir. Instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.
LABORATORY:
Shealy Environmental Services, Inc., NC Wastewater Certificate No. 3.29, and Pace
Analytical Services, Inc., NC Wastewater Certificate No. 40, perform analyses of effluent
samples. These laboratories are certified by the State of North Carolina to perform analysis on
all parameters specified in the permit. Shealy Environmental. Services and. Pace Analytical
Services were not evaluated under this inspection..

EFFLUENT/RECEIVING WATERS:
There was no discharge at the time of the inspection. The facility discharges to an
unnamed tributary to Taggart Creek, which is a Class "C" water within the Catawba River Basin,
SELF -MONITORING PROGRAM:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2003
through November 2004. The reports indicate that the facility was meeting permit effluent limits
and monitoring requirements during this period. The reports indicate that all parameters are
being monitored at the required frequencies and locations,
OPE
TIONS & MAINTENANCE:
The facility and grounds appeared to be properly operated and maintained. The current
overall operating strategy appears acceptable for the size and type of the facility.

CERTIFIED MAlE War- 03
RETURN RECEIPT REQUESTED
Mr, Jerrell G. Cook
National Welders 'Supply Co. Inc,
P.O, 1:3ox 31007
Charlotte, NC 28231
SUBJECT:
Dear Mr. Cook:
NOTICE OF OF DEFICIENCY
Effluent. Toxicity 'resting
NPDES Permit- No, NC00797S5001
National Welders Supply Co,
Mecklenburg County
Micha,z1 F. Easley„ Governor
Ci, Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
June 14, 2006
Alan W. Klimek, P/E, Director
ien ul Wmer Quality
This is to inform you that the Environmental Sciences .Section has received our toxicity self-m.oratoring report form
for 2005; however,. it was received late. This is in violation of Title 15A. of the North Carolina. Administrative Code, Chapter 2,
Subchapter 2B, Section ;0506 (a)(1.)(A) which states that "monthly monitoring reports shall be :filed no later than 30 days after
the end of the reporting period for which the report was made."
The toxicity report form was received ,after Mr. John Giorgino of this office notified Ms. Angelique Crews, the
Operator in Responsible Charge (0,RC) on 5/31106. We appreciate your quick response to this matter. Unfortunately, the
Environmental Sciences Section did not receive the original signed Aquatic Toxicity Test Form within the 30 da reporting
period,
Please remember that reporting of toxicity self -monitoring data is a dual requirement. 1 oxicity test results must be
entered on your Discharge 'Monitoring Report and the Toxicity Reporting Form (AT Report Form) must be submitted to:
DWQ/ESS, 1621 Mail Service Center, .Raleigh NC 27699-1621 within the required time ti-ame.
In the future, you are requested to submit the toxicity sclf-m tutoring report form to this office within the 30-day
reporttng period.
Please be advise': that lale andio
authority of the division:
on-repo.rttng of1oxicit self-rnonitoring data subjects you to the enforcement
The reverse side of this Notice contains a summary of important toxicity monitoring and reporting requirements.
Please read this one page summary and if you have any questions concerning this Notice, please contact Mr, John Giorgino with
the Aquatic 'Toxicology Unit at [phone],
cc: Rex Gleason- Mooresville Regional Office
John Lesley- Mooresville Regional Office
Aquatic Toxicology Unit Files
Central Files
Sincerely,
rton
Chief, Environmental Sciences Section
6fie .
NOrth Carolina
Naturally
North Carolina Division1)ivison of Water QuahtQuality 1621 Mail Service Center
internet wwwesb,enr.state,ncus 4401 Reedy Creek Rd.
Raleigh, NC 27699-1621
Phone [phone] Customer Sen,ice
Raleigh, NC 27607 FAX [phone]
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WHOLE EFFLUENT TOXICITY MONITORING. AND REPORTING INFORMATION
The following iterns are provided in an effort to assist you with identifying critical and sometimes overlooked toxicity testing and
reporting information, Please take time to review this information. The items below do not address or include all the toxicity
testing and reporting requirements contained in your NPDES permit, If you should have any questions about your toxicity -
testing requirement, please contact Mr. Kevin Bowden with the Aquatic Toxicology Unit at [phone] or another Unit
representative at the same number,
• The permittee is responsible for ensuring that toxici • tesnng is conducted according to the pemnt requirement and that toxicityreport
.forms are appropriately filed,
?. The reporting of Whole effluent toxicity testing data is a dual requirement. All toxicity test results must be entered (with the
appropriate parameter code) on your monthly Discharge Monitoring Report which is submitted to
North Carolina Division of Water Qualtt
Central Files
161.7 Mail Service Center
R.al.eigh, NC 27699-161'7
IN ADDJTION
Toxicity test data (original "AT" form) must he submitted to the following address,
North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mad Service Center
Raleigh, North Carolina 27699-1621
• Toxicity test results l be filed With the Environmental Science's Section no later than 30 days after 'h end of the reporting
period (eg, January' test result is due by the end of February).
'fr Toxicity test condition language contained in your NPDES permit may require use of multiple concentration toxicity testing upon
failure of any single quarterly toxicity test. If the initial pass/fait test fails or if the chronic value is lower than the permit limit, then at
least two multiple concentration toxicity tests (oneper month) will be conducted over the following two months, As many analyses as
can he completedwill be accepted. If your NPDES permit does not require use of multiple concentration toxicity testing upon failure
of any single quarterly test, you may choose to conduct either single concentration toxicity testing OT multiple concentration toxicity
testing per the Division's WET enforcement initiatives effective July 1, 1999. Follow-up multiple concentration toxicity testing
influence the Division's enforcement response,
'Toxicity testing months are specified by the NPDES Permit, except for NPDES Permits which contain episodic toxicity monitoring
requirements (eg, if thetesting months specified in your NPDES permit are March, June, September, and December, then toxicity
testing must he conducted during these months).
▪ Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly monitoring will begin
immediately until such time that a single test is passed. Upon passing this monthly test requirement, the permittee will revert to the
quarterly months specified in the permit, Please note that your permit may or may not contain this language.
If your NPDES Permit ,specifies episodic monitoring and your facility does not have a discharge from January I -June 30, then you
must provide written notification. to the Environmental Sciences Section by June 30 that a discharge did not occur during thefirst six
months of the calendar year
If sou receive notification from your contract laboratory that a test was invalidated, you should immediatelynotify the Environmental
Sciences. Section at [phone] and provide written documentation indicating why the test was invalidated and the date when
follow-up testing will occur.
• If your facility is required to conduct 'toxicity testing during a month in which no discharge occurs, you should complete the
information block located at the top of the AT form indicating the facility name, permit number, pipe number, county and the
month/year of the subject report. You should also write "No Flow" on the AT form, sign the form and .submit following normal
procedures.
The Aquatic Toxicity Test .forms Shall be signed by the facility's Operator in .Responsible Charge (ORC) except for facilities which
have not received a .facility clas.sification, In these cases, a duly authorized facility representative must sign the AT form. The AT
form must also be signed by the performing lab supervisor.
To determine if your AT test forms were received OTT time by the Division of WaterQuality soa rna Lonsider uhrnstting vour
toxiess test results certified mail, return receipt requested to the ETWftonmental Sciences Section,

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor William G. Ross, Jr,, Secretary
Alan W. Klimek, P.E., Director
January 11, 2005
Mr. Randy Miller, Regional Plant Manager
National Welders Supply Co., Inc.
Post Office Box 31007
Charlotte, North Carolina 28231
SUBJECT: Compliance Evaluation Inspection
National Welders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N.C.
Dear Mr. Miller:
On December 22, 2004, Mr. David Rimer of the Mecklenburg County Water Quality
Program (MCWQP) conducted an inspection at the subject facility. This inspection was
conducted as part of a cooperative working agreement between Mecklenburg County and the
Division of Water Quality. The enclosed report should be self-explanatory.
If you have any questions concerning this report or any other matters, please do not
hesitate to call Mr. Richard Bridgeman or me at this office.
Enclosure
cc: Rusty Rozzelle, MCWQP
DRG/djr
FILE: WQ National Welders,0079758120.doc
Sincerely,
• 3
, D. Rex Gleason, P.E.
Surface Water Protection Regional Supervisor
Mooresville Regional Office
610 East Center Avenue, Suite 301, Mooresville, North Carolina 28115
Phone: [phone] / Fax: [phone] / Internet: h2o,enr.statesic,us
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
One
NorthC ohna
Naturally

Transaction
N
United States Environmental Protection Agency, Washington , DC 20460 ArForm Approved
NPDES Compliance Inspection Report rA
-% ,
N it Carolina Department of Environment and Natural Resources OMB No2040-0003Approval Expires
Division of Water Quality, Mooresville Regional Office NCDENR 7/31/85
Section A: National Data System Coding
Code NPDES Pennit No,
5 NC0079758
YR1MO/DAY Inspection1).[pe
04/1.2/22
Inspector
Facility Type
Remarks:
Inspector: Meeklenburg Count v Water Quality Program
Inspection Work Days Facility Self -Monitoring Evaluation Rating 131
0..8 3
Name and Location of Facility Inspected:
National Welders Supply Company, Inc,
Lime Slurry Treatment Facility
5313 Old Dowd Roa.d
Mecklenburg County, NC
QA
N
Section Facility Data
Entry Time:
10:00 AM
Exit Time:
11:30 AM
Date:
December 22, 2004
Name(s) of Ott -Site Representatives No(s):
Mr. Randy Miller Regional Plant Manager 704-644-3249
Ms..Alissa Williams Environmental ScientistIURS Corporation —North Carolina
Name and Address of Responsible Official:
Mr, Randy Miller
National Welders Supply Company, Inc.
P.O. Box 31007
Charlotte, NC 28231
P
z Records 'Reports
Facility Site Review
Fffluent/ReceivMg Waters
as are rated satisfactory
Signature(s) of lnspector(s):
David J. RirnerTh
ignature o
FP,- For
ermit Effective Date:
'ebruary 1, 2002
it Expiration Da
30, 2005
704-522-0330
Regional Plant Manager
Phone No.
704-644-3249
Section C.
Areas Evaluated Durig IllsPeetsi°
ri Flow Measurement Operatiml
Self -Monitoring Program LJ Sludge Handling/Disposal
Ei] Compliance Schedules Pretreatment Program
VJ Laboratory Stormwater
Section D: Summary of Findings/Connents
Contacted?
Yes
Over ow
El Pollution Preventio.
El 'Multimedia
LJ
other:
unless otherwise indicated. See Attached Sheet(s) for Summary
Agency/Office/Telephone:
viewer:
560-3 (Revised 3-85) Prevm
MCWQP/[phone]
s Editions are Obsolete
Date:
December 28, 2004

GENERAL:
The facility was last inspected. by MCWQP on lune 7, 2004. A Compliance Evaluation
Inspection report was issued on June 30, 2004.
PERNIIT:
The current permit became effective on February 1, 2002 and expires on June 30, 2005.
The permittee will submit the permit renewal application prior to 180 days before the expiration
of the current permit The current permit properly describes the facility and appears adequate for
the waste stream being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime shiny holding pond, two seepage collection ponds, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2003
through November 2004 and appear to be properly completed. Records, reports, and logs are
clear and well maintained,
FACILITY SITE REVIEW:
All of the major components of the facility were in service and appeared to be operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir. Instantaneous
weekly discharge flow calculatio-n is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.
LABORATORY:
Shealy- Environmental Services, Inc., NC 'Wastewater Certificate No. 329, and Pace
Analytical Services, Inc., NC Wastewater Certificate No. 40, perform analyses of effluent
samples. These laboratories are certified .by the State of North Carolina to perform analysis on
all parameters specified in the permit. Shealy Environmental Services and Pace Analytical
Services were not evaluated .under this inspection.

EFFLUENT/RECEIVING 'WATERS:
There was no dischare at the time of the inspection. The facility discharges to an
unnamed tributary to Taggart Creek, which is a Class "C" Water within the Catawba River Basin.
SELF -MONITORING PROGRAM:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2003
through November 2004. The reports indicate that the facility was meeting permit effluent limits
and monitoring requirements during this period. The reports indicate that all parameters are
being monitored at the required frequencies and locations.
OPERATIONS & MAINTENANCE:
The facility and grounds appeared to be properly operated and maintained. 'Ehe current
overall operating strategy appears acceptable for the size and type of the facility.

711
NCDENR
Jerrell G. Cook
National Welders Supply Company, Inc.
PO Box 31007
Charlotte, NC 28231.
Dear Permittee:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
September 9, 2004
Subject: Renewal Notice.
NPDES Permit NC1079758
National Welders Supply Company
Mecklenburg County
Your NPDES permit expires on June 30, 2005. Federal (40 C 'R 122.41) and North Carolina (15A NCAC 2H.0105(e))
regulations require that permit renewal applications must be filed at least 180 days prior to expiration of the current permit. If
you have already mailed your renewal application, you may disregard this notice.
To satisfy this requirement, your renewal package must be sent to the Division postmarked no later than January 1,
2005. Failure to request renewal by this date may result in a civil assessment of at least $500.00. Larger penalties may be assessed
depending upon the delinquency of the request.
If any wastewater discharge will occur after June 30, 2005, the current permit must be renewed. Discharge of wastewater
without a valid permit would violate North Carolina General Statute '143-215.1; unperrnitted discharges of wastewater may be
assessed civil penalties of up to $25,000 per day.
If all wastewater discharge has ceased at your facility and you wish to rescind this permit, contact me at the telephone
number or address listed below. You may also contact the Mooresville Regional Office at [phone] to begin the rescission
process.
Use the enclosed checklist to complete your renewal package. The checklist identifies the items you must submit with
the permit renewal application. If you have any questions, please contact me at the telephone number or e-mail address listed
below.
cc Central. Files
Mooresville Regional Office, Water CutalitySect<ion
NPDES File
Sincerely,
Charles H. Weaver, Jr.
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
VISIT us ON rhE NNTERNET http:llh2o.enr,state,nc,usJNPDES
919 733-5083, extension 511 (fax) 919 733.0719
e-mail: chartes.weaver ma; .net

NPDES Permit NC0079758
National Welders Supply Company
Mecklenburg County
The f oll©wing items are RE QUIRE D for all renewal packages:
❑ A cover letter requesting renewal of the permit and documenting any changes at the facility since
issuance of the last permit. Submit one signed original and two copies.
The completed application form (copy attached), signed by the permittee or an Authorized
Representative. Submit one signed original and two copies.
❑ If an Authorized Representative (such as a consulting engineer or environmental consultant) prepares
the renewal package, written documentation must be provided showing the authority delegated to any
such Authorized Representative (see Part II.B.11.b of the existing NPDES permit).
C7 A narrative description of the sludge management plan for the facility. Describe how sludge or other
solids) generated during wastewater treatment are handled and disposed. If your facility has no such
plan (or the permitted facility does not generate any solids), explain this in writing. Submit one signed
original and two copies.
The following items must be submitted by any Municipal or Industrial facilities discharging
process wastewater
Industrial facilities classified as Primary Industries (see Appendices A-D to Title 40 of the Code of Federal
Regulations, Part 122) and ALL Municipal facilities with a permitted flow 11.0 MGD must submit a
Priority Pollutant Analysis (PPA) in accordance with 40 CFR Part 122.21.
The above requirement does NOT apply to privately owned facilities z °atrrg 100%
domestic wastewater, or facilities which discharge non -process wastewater(' cooling
water, filter backwash, etc.,)
Due to a change
PLEASE NOTE:
fees effective January 1, 1999, there is no renewal fee required with your
application package.
Send the completed renewal package to:
Mr. Charles H. Weaver, Jr.
NC DENR / Water Quality / NPDES Unit.
1617 Mail Service Center
Raleigh, NC 27699-1617

Witliarn G, Ross Jr., Secretvy
North Carolina Dq}iertment efEnvironrrresrt and Natural Resourrea
Alan W, Klimek, P. E. Director
Division of Water Quality
Coleen H. Sullins. Deputy Dior
Diviwo of Water Quality
June 30, 2004
Mr. Randy Miller, Regional Plant Manager
National Welders Supply Co., Inc.
Post Office Box 31007
Charlotte, North Carolina 28231
UB)E.CT; Compliance Evaluation Inspection.
National. Welders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N.C.
Dear Mr
On June 7, 2004, Mr, David Rimer of the Mecklenburg County Water Quality Program
(MCWQP) conducted an inspection at the subject facility. This inspection was conducted as part
of a cooperative working agreement between Mecklenburg County and the Division of Water
Quality. The enclosed report should be self-explanatory.
If you have any questions concerning this report or any othermatters, please do not
hesitate to call Mr. Richard Bridgernan or me at this office.
Enclosure
cc: Rusty Rozzelle, MCWQP
DRGldjr
FILE: WQ National Welders.0079758.060 .doc
Sincerely,
{
L,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
919 North Main Street, Mooresville NC 28115 [phone] Cusuamar Service
1-877-62.3-674R

spector(
Transaction
United States Environmental Protection Agency. Washington . DC 20400
NPDES Compliance Inspection Report A
North (irolan i Depart-ment of Environment and Natural Resources NCDEN
Division of Water Quality, Mooresville Regional Office
Section A National Data System Codin
Code NPDES Pernut No. YR/MO/DAY
5 NC0079758 04/06/07
Inspection. Work Days Facility Self Monitori
0,8
lame and Location of Facility Inspected:
National Welders Supply Company, Inc.
f irne Slurry Treatment Facility
5313 Old Dowd Road.
Mecklenburg County„ NC°
ame(s) of On -Site Representatives -Titles)
3r. Randy Miller Regional Plant Manager
Ir. Eric J. Y. Wu, P,E, Principal Environrnenta',
is. Angelique Crews Environmental Speciali.s
Remar
ttb
inspection
C
Evaluation Rating f3'I
N
n B: Facility Dat
Entry
10:10 AM
Exit Time:
11:3© AM
Date:
Tune 7, 2004
QA
N
Phone No(s).
704-644-3 249
gineer/LfRS Corporation -• North Carolina
ale Engineering 704-S82-4222.
Form Approved
OMB No 20-10-0003
Approval Expires
t$l;ti;
,Reserved ._a
emit EtTective Date:
bruary 1. 2002
Per
t Expiration Date:
0, 20Q5.
Name and Address of Responsible Official:
Mr. Randy Miller
National Welders Supply Company, Inc.
_Box 3I007
Charlotte, NC 2
P
Records/Reports
Facility Site Review
Flow
ement
Self -Monitoring Program
El Compliance Schedules
NJ Effluent/ Receiving Waters r Laboratory
All areas are rated sati
Section D: Su
Title:
RegionalPlant Manager
Ctperations : Maintenance
udr e Handling/Disposal
etreatrrtent Program
ormwater
of Findings/Commen
unless otherwise indicated. See A.
Contacted?
Yes
1e uow
Pollution Prevention
❑ Multimedia
❑ Guitar:
d Slae
Summary
Signature(s)
David J. Rimer
Sisnature of
Agency/0 phone:
MCWQP/('7114) 336-5500
Agency/Office
Date:
Date:
EPA Form 35fitt_3 (Revised 3-85)
vious Editions are Obsolete

GENERAL:
The facility was last inspected by MC QF on December 29, 2002. A Compliance
Evaluation Inspection report was issued on January 13, 2003.
PERMIT:
The current permit became effective on February 1, 2002 and expires on June 30, 2005.
The current permit properly describes the facility and appears adequate for the waste stream
being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime slurry holding pond, two seepage collection ponds, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period June 2003 through
May 2004 and appear to be properly completed. Records, reports, and logs are clear and well
maintained.
FACILITY SITE REVIEW:
All of the major components of the facility were in service and appeared to be operatin
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir. Instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.
LABORATORY:
Shealy Environmental Services, Inc. and Simalabs, International perform analyses of
effluent samples. These laboratories are certified by the State of North Carolina to perform
analysis on all parameters specified in the permit. Shealy Environmental Services and Simalabs
were not evaluated under this inspection.

EFFLUENT CEIVING WATERS:
There was no discharge at the time of the inspection. The facility discharges to an
unnamed tributary to Taggart Creek, which is a Class "C- water within the Catawba River Basin,
SELF -MONITORING PROG
M:
Discharge Monitoring Reports (DMRs) were reviewed for the period June 2003 through
May 2004. The reports indicate that the facility was meeting permit effluent limits and
monitoring requirements during this period. The reports indicate that all parameters are being
monitored at the required frequencies and locations,
OPERATIONS & MAINTEN CE:
The facility and grounds appeared to be properly operated and maintained. The cunent
overall operating strategy appears acceptable for the size and type of the facility.

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Alan W. Klimek, P.E., Director
November 5. 2004
NATIONAL WELDERS SUPPLY CO
ATTN: GERALD S CARVER, OR SUCCESSOR
PO BOX 668804
CHARLOTTE, NC 28266
Dear Perinittee:
NORTH CAROLINA DEPARTMENT OF
EN\MRONMENT AND NATURAL RESOURCES
NC
Subject: NPDES Stormwater Permit Renewal
National Welders Supply Co
Permit Number NCS00)045
Mecklenburg County
Your facility is currently covered for storrnwater discharge under NPDES Permit NCS000045. This permit expires
on June 30, 2005. North Carolina Administrative Code (15A. NCAC 211,0105(e)) requires that an application for
permit renewal be filed at least 180 days prior to expiration of the current permit. In order to, assure your continued
coverage under your permit, you must apply to the Division of Water Quality (DWQ) for renewal of your permit.
To make this renewal process easier, we are informing you in advance that your permit will be expiring. Enclosed
you will find an individual permit renewal application form, supplemental information request, and Stormwater
Pollution Prevention Plan certification.
Filing the application form along with the requested, supplimental information will constitute your application for
renewal of your permit. As stated above, the application form must be completed and returned along with all
requested information by January 7, 2005 in order for the permit to be renewed by June 30, 2005.
Failure to request renewal by January 7. 2005 may result in a civil assessment of at least $500.00. Larger penalties
may be assessed depending on the delinquency of the request. Discharge of stormwater from your facility without
coverage under a valid stormwater NPDES permit would constitute a violation of NCGS 143-21.5.1 and could
result in assessments of civil penalties of up to $25,000 per day.
If you have any questions regarding the permit renewal procedures please contact Bill Mills of the Stormwater and
General Permits Unit at [phone], ext. 548.
Sincerely,
Bradley Bennett, Supervisor
Stormwater and General Permits irk
cc: Central Files
Storm water and General Permits.' Unit 'Files
Mooresville Regional Office
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Michael F. Easley, Governor
William. G. Ross Jr.. Secretary
North Carolina Department of Enviranrnent and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
2/11/2004
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Jerrell G Cook
National Welders Supply Co Inc
PO Box 31007
Charlotte NC 28231
SUBJECT: NOTICE OF VIOLATION AND REVOCATION FOR NON PAYMENT
PERMIT NUMBER NC0079758
National Welders Supply Co
Mecklenburg COUNTY
Dear Permittee:
Payment of the required annual administering and compliance monitoring fee of $715.00 for this year has not
been received for the subject permit. This fee is required by Title 15 North Carolina Administrative Code 2H.0105, under
the authority of North Carolina General Statutes 143-215.3(a)(1), (la) and (1 b). Because this fee was not fully paid within
30 days after being billed, this letter initiates action to revoke the subject permit, pursuant to 15 ncac 2H.0105(b) (2) (k)
(4), and G.S, 143-215.1 (b) (3).
Effective 60 days from receipt of this notice, subject permit is hereby revoked unless the required Annual
Administering and Compliance Monitoring Fee is received within that time. Discharges without a permit are subject
enforcement authority of the Division of Water Quality. Your payment should be sent to:
o the
N.C. Department of Environment and Natural Resources
Division of Water Quality
Budget Office
1617 Mail Service Center
Raleigh, NC 27699-1617
If you are dissatisfied with this decision, you have the right to request an administrative hearing within Thirty (30)
days following recipt of this notice, identifying the specific issues to be contended. This request must be in the form of a
written petition conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, Post Office Drawer 27447, Raleigh, North Carolina, 27611-7447. Unless such request for hearing is made or
payments received, revocation shall be final and binding. If you have any questions, please contact:
Mr. Rex Gleason, Mooresville Water Quality Regional Supervisor, [phone].
Alan W. Klimek, P.E.
cc: Supevisor, Water Quality Permits and Engineering Unit
Mooresville Regional Office
County Health Department
1617 Mail Service Center, Raleigh, NC 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

North Carolina
Michael F. Easley„
William G_ Ross Jr., Secretary
t rtment and Natural Resources
Aian W, Klimek, P. E. Director
Division of Water Quality
Coker¢ Sullins, Deputy Director
Division of Water Quality
CERTIFIED MA.
RETURN RECEIPT RE +Qi EL T1
Mr, Jerrell Cook
National Welders Supply Company
P.O. Box. 31007
Charlotte, NC 28231-6098
Dear Mr. Cook:
January 8, 2004
7003 2.260 0001 3491 1135
Subject: Notice of Violation - Effluent Limitations
National Welders Supply Company \'VWTP
NPDES Permit No, NC0079758
NOV-2004-LV-0007
Mecklenburg County
A review of the April 2003 self -monitoring report for the subject facility revealed violations of the
following parameter:
Pike Parameter
001 pH
001 pH
Reported Value limit
9,94 >6.0 - 9.0 s.u. FIN
9.88 >6.0 - <9.0 s.u. FIN
Remedial actions, if not already implemented, should be taken to correct any problems. The
Division of Water Quality may pursue enforcement actions for this and any additional violations. If the
violations are of a continuing nature, not related to operation and/or maintenance problems, and you
anticipate remedial construction activities, then you may wish to consider applying for a Special Order by
Consent, You may contact Richard Bridgetnan of this Office for additional information.
If you have questions concerning this matter, please do not hesitate to contact Mr. Richard
Bridgman or me at 704/663-1699.
Sincerely,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
cc: Point Source CompliancelEnforctrtent Unit.
Rusty Rozzelle, MCWQP
RMB
41044
FinErsiR
Mo resnlle Regional ice, 919 Noah Main Street, Mooresville NC 28115 (704) 6 i3 1699 Customs& Service
1-877•623-6748

MAJOR SUPPLIERS. OF CRYOGENICS AND WELDING EQUIPMENT
P.O. Box 3'1007
Charlotte; NC 28231-6098
Phone [phone]
Fax "70.4/391-7873
August 4, 2003
NC DENR Division of Water Quality
ATTENTION: Richard Bridgeman
Mooresville Regional Office
919 North Main Street
Mooresville, NC 28115
RE: Response to Notice of Violation, Issued To,
National Welders Supply Co,,
Charlotte, North Carolina, Mecklenburg County
NPDES No. NC0079758
Dear Mr. Bridgeman:
% t A
This letter is in response to a Notice of Violation (NOV) issued to National Welders
Supply Co., Inc, (National Welders), dated July 21, 2003, This NOV addresses an
exceedance ofTotal Suspended Residue (TSR) in effluent discharged on March 20, 2003.
The NOV cites a TSR value of 35 mg/1, which exceeds the monthly average of 30 mgil,
but is less than the 45 mg/1 daily maximum. As was stated in the Discharge Monitoring
report (DMR) submitted by National Welders, no major changes occurred near the time of
sampling to cause the TSR increase, Furthermore, the results of turbidity monitoring at
downstream of 77 NTU and upstream of 90 NTU indicated the discharge did not
negatively impact the stream water quality, but rather the effluent improved the water
clarity, No reason has been identified as a cause for the high TSR result, which was
inconsistent with turbidity results.
In an effort to quantify the amount of solids released to the environment, the TSR level of
35 mg/1 is shown to be equivalent to 0.0003 lbsigallon. During this discharge event,
approximately 14,000 gallons of water were reported to have been discharged, for a total
of 4.1 pounds of TSR discharged to the tributary. However, it is highly likely that National
Welders flow circulation system pump was activated during the discharge period because
recycled water is used on a daily basis. This would have pumped water into the production
process, and would have prevented its discharge over the weir Therefore, the actual flow
discharged is believed to have been well below the calculated discharge flow.

Please note that since the March submittal, DMRs have been submitted for April, May,
and June monitoring, Sampling results for each month shows TSR to be well below the
daily and monthly limits. Efforts have been made to identify the cause of the elevated
March TSR results, but none have been found to this date, However, it is apparent that
this exceedance was not ongoing in nature, but may have been attributable to anomalous
circumstances during discharge or sampling that are not representative of the practices
employed at National Welders,
National Welders is committed to maintaining the environmental protections written in its
NPDES discharge permit, and has dedicated several resources to this end, It is hoped that
the Division of Water Quality will recognize this commitment, and take the facts presented
in this letter into consideration when making any further determinations, If you have any
questions, please feel free to contact me at [phone] ext. 317 or our environmental
consultant, Eric Wu with URS Corporation -NC, at [phone], Thank you for your
time.
Sincerely yours,
Jerrell G. Cook
Manager - Compressed Gases
Cc: Eric Wu, URS

CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr, Jerre11 Cook
National Welders Supply Company
P.O. Box 31007
Charlotte, NC 28231-6098
Subject:
Dear Mr. Cook:
A review of the March 003 se
the following parameter:
Michael F. 'Easley, Gov .
William G. Ross lr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P. E., Director
- Division of Water Quality
July 21, 2003
7001 2510 0004 8286 6945
Notice of Violation - Effluent Limitations
National Welders Supply Company WWTP
NPDES Permit No. NC0079758
NOV-2003-LV-0076
Mecklenburg County
Parameter
001 Total Suspended Residue
itoring report for the subj
Reported Value
35 rng/L
Coteen ft Sullins, Deputy Director
Division of Water Quality
Limit
30.0 mg/L FIN
a violation o
Remedial actions, if not already implemented, should be taken to correct any problems. The
Division of Water Quality may pursue enforcement actions for this and any additional violations. If the
violations are of a continuing nature, not related to operation and/or maintenance problems, and you
anticipate remedial construction activities, then you may wish to consider applying for a Special Order by
Consent. You may contact Richard Bridgman of this Office for additional information.
If you have questions concerning this matter, please do not hesitate to contact Mr. Richard
Bridgeman or me at 704/663-1699.
Sincerely,
)
D. Rex G
Water Qua ity Regional Supervisor
cc: Point Source Compliance/Enforcment Unit
RMB
ooresville Regional919 North Maim Street. MoorevIUe, North Carolina 28115
Phone [phone]
Fax [phone]
or%
DENR
Customer Service
1-877-623-6748

Michael F, Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
7/22/03
Jerrell G Cook
ciij1/4f. National Welders Supply Co Inc
P. O. Box 31007
harlotte, NC 28231
SUBJECT: Payment Acknowledgment
Civil Penalty Assessment
National Welders Supply Co
Mecklenburg County
Permit No: NC0079758
LV-2003-0198
Dear Mr. Cook:
2003
This letter is to acknowledge receipt of check No. 680718 in the amount of $335.45. received from
you dated July 14, 2003. This payment satisfies in full the civil assessment levied against the
subject facility and this case has been closed. Payment of this penalty in no way precludes future
action by this Division for additional violations of the applicable Statutes. Regulations, or Permits.
If you have any questions, please call Robert L Sledge at 919-733-5083 Ext.547.
Sincerely,
For Coleen Sullins, Deputy Director
Division of Water Quality
cc: Enforcement File #: LV-2003-0198
Mooresville Regional Office Supervisor
Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617 [phone]
Customer Service 1 800 623-7748

May 30, 2003
MEMORANDUM.
TO: Rex Gleason
FROM: Richard Bridgeman
SUBJECT: Request for Remission of Civil Penalty
Case No, LV 03-198
National Welders Supply Co., Inc.
NPDES Permit No. NC0079758
Mecklenburg County
The NWSC was assessed a civil penalty of $1085.45, including $85.45 in enforcement.
costs, on 3/1'7/03. The case covers a TSR daily maximum violation (not assessed) and a TSR.
monthly average violation, occurring during 11/02. The only reported discharge during 1.1/02
was on the 12th, with a reported flow of 0.0023 MGD.
According to the company, 2 inches of stormwater on the date of the violation and
maintenance activities on the seepage pond and treatment basin during the period from 9/12
through 10/3 may have contributed to the TSR violations on 11/12. Supposedly, the discharge
lasted only 3 hours. During 12/02, 1/03, 2/03, and 3/03 (latest DMR), there were a total of only
5 reported discharges from the system. The TSR monthly average limit was violated during 3/03,
but the value does not meet assessment criteria.
There have been no previous civil penalty assessments for limits violation against NWSC.
Within the framework of the remission factors, the permittee did not truly provide
justification for remission of the assessment; however, the duration and gravity of the violation
was not significant; only 0.92 pounds of TSR was discharged. Plus, the combination of the heavy
rain and the prior excavation of material from the treatment pond could have contributed to the
violation.
word\rnerno I Wdder RRd

4
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
Wiliam G. Ross Jr,, Secretary
Alan Klimek, P.E., Director
April 24, 2003
Attn: Mr. Derrell G. Cook.
P, 0. Box 31.007
Charlotte, NC 28231
Dear Mr. Cook
APR 2
Subject; Remission Request of
Civil Penalty Assessment
National Welders Supply Co
Mecklenburg County
Permit No; NC0079758
LV 03-198
This letter is to acknowledge your request for remission of the civil penalty levied against the subject facility.
You will be notified when a decision is made concerning the request. If you have any questions, please call
Bob Sledge at [phone].
Sincerely,
rr Coleen Sullins, Deputy Director
Division of Water Quality
Cc: MRQ WQ Supervisor wfattachment.
Enforcement. File #: LV 03-198 w/3 attachments
Central Files
1617 Mail Service Center, Raleigh, NC 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
COUNTY OF Mecklenburg
IN THE MATTER OF ASSESSMENT
CIVIL PENALTIES AGAINST
National Welders Supply Co., Inc.
PERMIT NO. NC0079758
WAIVER OF RIGHT TO AN OF
ADMINISTRATIVE HEARING
AND STIPULATION OF FACTS
FILE NO. LV tl-91
Having been assessed civil penalties totaling re5, for
violation(s) as set forth in the assessment document of the Division of Water Quality dated
47/2c r/ C% cP`cJ d 3 , the undersigned, desiring to seek remission of the civil
penalties, does hereby waive the right to an administrative hearing in the above -stated matter and
does stipulate that the facts are as alleged in the assessment document. The undersigned further
understands that all evidence presented in support of remission of this civil penalty must be
submitted to the Director of the Division of Water Quality within 30 days of receipt of the notice
of assessment. No new evidence in support of.a remission request will be allowed after 30 days
from the receipt of the notice of assessment.
This the / l day of,
BY
ADDRESS
2003
C kat-cc()
TELEPHONE

April 15, 2003
MAJOR SUPPUERS OF CRYOGENICS AND WELDING EQUIPMENT
P.U. Box 31007
Chariotte, NC 28231-6098
Phone [phone]
Fax [phone]
Water Quality Section Chief
Division of Water Quality
North Carolina Department of Environment and Natural Resources
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
,oleen Sullins
NOV Response & Request for Remission of Civil Penalty Assessment
National Welders Supply Co., Inc.
NPDES Permit No, NC0079758
Mecklenburg County, North Carolina
Dear Ms. Sullins:
This letter serves as the written response to the Notice of Violation (NOV) and Civil Penalty
Assessment received March 21, 2003 by National Welders Supply Co, Inc. (National Welders)
The NOV was issued in response to the November Discharge Monitoring Report (DMR)
submitted by National Welders to the North Carolina Department of Environment and Natural
Resources (NCDENR)-Mooresville Regional Office, dated December 27, 2002. The DMR
reported Total Suspended Solids (TSS) at a concentration of 48.0 milligrams per liter (mgil) on
November 12, 2002. According to the National Pollutant Discharge Elimination System
(NPDES) discharge permit for the subject site, Permit No. NC0079758, the daily maximum
standard for TSS is 45.0 mg1 with a monthly average of 30.0 mg/1. National Welders would like
to request a remission or mitigation of the civil penalty assessment of $1,000.
The exceedance occurred when two -inches of storm water were observed being discharged over
the weir from treatment basin into an unnamed tributary of Taggart Creek. This discharge had
occurred for approximately three hours prior to discovery. Once the discharge was detected,
storrn water overflow was pumped into a seepage pond to prevent additional discharge into the
tributary.
Prior to this discharge event, National Welders had undertaken maintenance activities on the
seepage pond and treatment basin during the month of October 2002. These activities included
the following:
• use of a tractor/back-hoe to excavate portions of the treatment pond,
• riprap removal and replacement,

slope stabilization, and,
compaction/removal of soil located in the basin of the seepage pond and seepage
treatment basin,
In an effort to improve the current treatment system, these maintenance activities may have
contributed to the TSS readings recorded in November.
In an effort to quantify the arnount of TSS released to the environment, the TSS level of 48 mg/1
is shown to be equivalent to 0.0004 ibs/gallon. During this discharge event, approximately 2,290
gallons of water flowed over the weir, for a total of 0,917 pounds of TSS discharged to the
tributary. During the entire discharge, less than one pound of TSS was released. In addition,
laboratory analysis for turbidity of samples collected upstream of the discharge point equaled 57
NTU, and downstream equaled 47 NTU. Therefore, not only did the discharge not cause the
turbidity of the tributary to exceed 50 NTU, it improved the turbidity by 10 NTU.
In accordance with Section 2(a) of the Notice of Violation and Civil Penalty Assessment, National.
Welders believes that the penalty assessment factors presented in the North Carolina General
Statute Excerpt 143B-282.1 may have been wrongfully applied. Due to the minute amount of
TSS released to the tributary, National Welders believes that there was no significant harm to the
natural resources of the State, to the public, or to private property resulting from the violation;
nor were there observable or anticipated effects on ground or surface water quantity or quality or
on air quality. Given that the discharge occurred for a maximum of three hours, the duration and
gravity of the violation was not significant. There were no costs of rectifying the damage, nor was
any amount of money saved by noncompliance. In fact, costs incurred to perform the above
mentioned preventive maintenance on the treatment system prior to the violation exceeded
$9,000, This invoice is included as Attachment A. Finally, the violation was unintentional
National Welders acknowledges the exceedance of permitted TSS discharges, However, it is
National Welder's hope that this request for remission will be considered carefully, and that the
civil penalty of $1,085.45 assessed for the subject site will be dismissed. The waiver of National
Welder's right to an administrative hearing is included in Attachment B.
Thank you in advance for your cooperation in this matter. If you have any questions, please feel
free to me at [phone] ext. 317 or our environmental consultant, Matt Lamb with URS
Corporation -NC, at [phone].
Sincerely yours,
C. Cook
er - Compressed. Gases
Attachments
Cc: Matt Lamb, URS

NAME
ADDRESS
CITY
ORDER NO
102824
}
QUAN.
2,942P
sr n'i Cw '^!C
NINGER C;R
RECEIVED BY TOTA
FM 35605 REV,

CERTIr IED MAIL 7000 1530 0002 2100 6593
RETURN RECEIPT REQUESTED
Mr, Jerrell G. Cook
National Welders Supply Co., Inc.
P. O. Box 31007
Charlotte, NC 28231
Michael F, Easley, Governor
William G. Ross Jr„ Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, RE. Director
Division of Water Quality
JUN 2 3 2003
SUBJECT: Remission Request of Civil Penalty Assessment
National Welders Supply Co., Inc.
Permit Number NC0079758
Mecklenburg County
Case Number LV-2003-0198
Dear Mr. Cook:
T
A 1 T sOURCIE
tOREsk OFFIOE
5 2003
1 have considered the information submitted in support of your request for remission in accordance with
G.S. 143-215,6A(I) and have decided to modify the initial civil penalty assessment of $1,085.45 to the total
amount of $335.45.
Should you choose to pay the modified penalty, payment should be tendered to me at the letterhead address
within thirty (30) days of receipt of this letter. Please make checks payable to the Department of
Environment and Natural Resources.
You also have the option of presenting you request to the Committee on Civil Penalty Remissions, which is
comprised of members of the Environmental Management Commission, The Committee may consider
such requests and render final and binding decisions in these matters. You may argue your request before
the Committee, and the Division staff will argue against any reduction of the assessment.
Should you choose to present your request to the Committee, please notify me at the letterhead address
within thirty (30) days of the receipt of this letter, Your request will be scheduled to be heard on the agenda
of the next scheduled Committee meeting, and you will be notified of the date and time. If the Division
does not receive a response regarding this notice, Division staff will automatically place your case on the
agenda of an upcoming Committee meeting.
If you have any questions, please call Bob Sledge at 919-733-5083, extension 547. Thank you for your
cooperation in this matter.
Sincerely,
Alan W. Klimek, PE,
cc: Enforcement File #: LV-2003-0198
Mooresville Regional Office Supervisor
Central Files
1617 Mail Service Center Raleigh, NC 27699-1617 [phone]
Customer Service 1 800 623.7748

VIS1ON OF WATER Q►U- C L PENALTY A SLSS '[EN "
VIOLATOR: Al 0,4 it ✓s4I r 4-
COUNTY: f+114`"L'K
CASE NUMBER: L L "" "
ASSESSMENT FAC"TGRS:.
l) The degree and extent of harm to the natural resources of the State„ to the public health, or to private property
resulting from the violation(s);
0 Not Significant 0 Moderately Significant 0 Significant 0 Very Significant 0 Extremely Significant
The Duration and gravity of the violation(s);
0 Not Significant 0 Moderately SignifSignificant 0 Very Significant 0 Extremely Signifi ant
3) The effect on ground or surface water quantity or quality or on air quality;
0 Not Significant 0 Moderately Significant 0 Significant 0 Very Significant 0 Extremely Significant
4) The tut of rectifying the damage;
0 Not Significant 0 Moderately Significant 0 Signifir ant 0 Very Significant 0 Extremely Significant
5) The amount of money saved by noncompliance;
0 Not Significant FAloderately Significant 0 Sign' icant 0 Very Si
6)
n
y Sign cant
her the violations) was (were) committed willfully or intentionally
0 Not Significant 0 Moder ly Significant 0 Significant 0 Very Significant 0 Extremely Significant
7) The prior record of the violator in complying or failing to comply with programsover which the
Envirotunental. Management Commission hats regulatory authority; and
0 Not Significant 0 Moderately Significant 0Significant 0 Very Significant 0 Extremely Significant
8) The cost to the State of the enforcement procedures
0 Not Significant 0 Moderately Significant 0 Significant 0 Very Significant 0 Extremely Significant
Date
RE i' tSSION FACTORS:
Whether one or more of the civil penalty
petitioner;
Whether the violator promptly abated continuing en
D. Rex Gleason, P.
Water Quality Regional Supervisor
clots were wrongly applied to the detriment of the
damage resulting from the -violation(s);
Whether the violation(s) was (were) inadvertent or a result of an accident;
Whether the
and
Whether pay
Date
had been assessed civil penalties for any previot
nt of the civil penalty will prevent payment for the rem
(b
Alan W. Klimek, P.E.
Director

Gel F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Duality
March 17, 2003
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
7001 2510 0004 8287 7736
Mr. Abraham Spencer, Area Production Manager
National Welders Supply Co.. Inc.
P.O. Box 31007
Charlotte, NC 28231
SUBJECT: Notice of Violation and Assessment of Civil
Penalty for Violations ofRC. General Statute
143-215,I(a)(6) and NPDES Permit No. NC0079758
National Welders Supply Co., Inc.
Lime Slurry Treatment Facility
Case No. LV 03-198
Mecklenburg County
Dear Mr. Spencer:
This letter transmits a Notice of Violation and assessment of civil penalty in the amount of
$1085,45 ($1000.00 civil penalty + $85.45 enforcement costs) against National Welders Supply
Co., Inc.
This assessment is based upon the following facts: A review has been conducted of the
discharge monitoring report (DMR) submitted by National Welders Supply Co., Inc. for the
month of November 2002. This review has shown the subject facility to be in violation of the
discharge limitations found in NPDES Permit No. NC0079758. The violations are suxnmarized in
Attachment A to this letter.
Based upon the above acts, I conclude as a matter °flaw that National Welders Supply
Co., Inc. violated the terms, conditions or requirements of NPDES Perrnit No. NC0079758 and
North Carolina General Statute (G.S.) 143-215.1(a)(6) in the manner and extent shown in
Attachment A. A civil penalty may be assessed in accordance with the maximums established by
G.S. 143-215.6A(a)(2).
Based upon the above findings of fact and conclusions of law, and in accordance with
authority provided by the Secretary of the Department of Environment and Natural Resources and
the Director of the Division of Water Quality, I, D. Rex Gleason, Water Quality Regional
Supervisor for the Mooresville Region, hereby make the following civil penalty assessment against
National Welders Supply Co., Inc.:
NCDENR
Customer Service Mooresville Regionai Office, 91 North Main Street. MorviiIe. NC 23115 PHONE (70,4) 563-1E29
1 BOO 822-7748 FAX [phone]

For / of the one (1) violation of G,S. 143-
215.1(a)(6) and NPDES Permit No. NC0079758, by
discharging waste into the waters of the State in
violation of the permit monthly average effluent limit
for Total Suspended Residue.
For of the one (1) violation of G.S. 143-
215.1(a)(6) and NPDES Permit No. NC0079758, by
discharging waste into the waters of the State in
violation of the permit daily maxirnum effluent limit
for Total Suspended Residue.
0 c). TOTAL CIVIL PENALTY
85.45 - Enforcement costs.
$ &' TOTAL AMOUNT DUE
Pursuant to G.S. 143-215.6A(c), in determining the amount of the penalty I have taken
into account the Findings of Fact and Conclusions of Law and the factors set forth at G.S. 143B-
282.1(b), which are:
(1)
(2)
(4)
(5)
(6)
(7)
(8)
The degree and extent of harm to the natural resources of the State, to the public
health, or to private property resulting from the violations;
The duration and gravity of the violations;
The effect on ground or surface water quantity or quality or on air quality;
The cost of rectifying the damage;
The amount of money saved by noncompliance;
Whether the violations were committed willfully or intentionally;
The prior record of the violator in complying or failing to comply with programs
over which the Environmental Management Commission has regulatory authority;
and
The cost to the State of the enforcement procedures.
Within thirty days of receipt of this notice, you must do one of the following:
Submit payment of the penalty:
Payment should be made directly to the order of the Department of Environment
and Natural Resources (do not include waiver form). Payment of the penalty will
not threclose further enforcement action for any continuing or new violation(s).
Please submit payment to the attention of:

Point Source Compliance/Enforcement Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
2. Submit a written request for remission or mitigation including a detailed
justification for such request:
A request for remission or mitigation is limited to consideration of the
reasonableness of the amount of the penalty and is not the proper procedure for
contesting the accuracy of any of the statements contained in the assessment letter.
Because a remission request forecloses the option of an administrative hearing,
such a request must be accompanied by a waiver of your right to an administrative
hearing and a stipulation that there are no factual or legal issues in dispute. You
must execute and return to this o irce the attached waiver and stipulation four and
a detailed statement which you believe establishes whether:
(a) one or more of the civil penalty assessment factors in G.S. 143B-282.1(b)
were wrongfully applied to the detriment of the petitioner;
(b) the violator promptly abated continuing environmental damage resulting
from the violations;
(c) the violations were inadvertent or a result of an accident;
(d) the violator had been assessed civil penalties for any previous violation,
(e) payment of the civil penalty will prevent payment for the remaining
necessary remedial actions.
Please submit this information to the attention of:
Ms. Coleen Sullins
Water Quality Section Chief
Division of Water Quality
1617 Mail Service Center
Raleigh, North. Carolina 27699-1617
Please note that all information presented in support of a request for remission
must be submitted in writing. The Director of the Division of Water Quality will
review the information during a bimonthly enforcement conference and inform you
of his decision in the matter of the remission request. His response will provide
details regarding case status, directions for payment and provision for further
appeal of the penalty to the Environmental Management Commission's Committee
on Civil Penalty Remissions. Please be advised that the Committee cannot
consider information that was not part of the original remission request considered
by the Director and therefore, it is very important that you prepare a complete and
thorough statement in support of your request for remission.
OR

Submit a written request for an administrative bearing:
If you wish to contest any statement in this assessment letter, you must request an
administrative hearing. This request must be in the form of a written petition to
the Office of Administrative Hearings and must conform to Chapter 150B of the
North Carolina General Statutes. You must:
File your original petition with the
Office of Administrative Hearings
6714 Mail Service Center
Raleigh, North Carolina 27699-6714
and
Mail or hand -deliver a copy of the petition to
Mr. Dan Oakley, General Counsel
Department of Environment and Natural Resources
1601 Mail Service Center
Raleigh, North Carolina 27699-1601
Failure to exercise one of the options above within days, as evidenced by a date
stamp (not a postmark) indicating when we received your response, will result in this matter being
referred to the Attorney General's Office with a request to initiate a civil action to collect the
penalty.
Please be advised that any continuing violation(s) may be the subject of a new
enforcement action, including an additional penalty. If you have any questions about this civil
penalty assessment, please contact the Water Quality Section staff of the Mooresville Regional
Office at 704/663-1699.
(Date) D. Rex Gle on, P.E.
Water Quality Regional Supervisor
Mooresville Regional Office
Division of Water Quality
ATTACHMENTS
cc: Water Quality Regional Supervisor w/ attachments
Compliance/Enforcement File w/ attachments
Central Files w/ attachments
RMB

t Viola t i n s, Ne e.
Par eta
e
Total Suspended Residue
Attachment
patio l elders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No, NC0079758
Case Number LV 03-198
2002
Montt Average Limit Violati
Reported Value
48
Par ter Reported Value
Total Suspended Residue 48
denotes ass s
30.0
45.i
Units
Units;
/l dr

STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
COUNTY OF Mecklenburg
IN THE MATTER OF ASSESSMENT
CIVIL PENALTIES AGAINST
Nation Welders Supply Co., Inc,
PERMIT NO. NC0079758
WAIVER OF RIGHT TO AN OF
ADMINISTRATIVE HEARING
AND STIPULATION OF FACTS
FILE NO. LV 0 .498
Having been assessed civil penalties total for
violation(s) as set forth in the assessment document of the Division of Water Quality dated
the undersigned, desiring to seek remission of the civil
penalties, does hereby waive the right to an administrative hearing in the above -stated matter and
does stipulate that the facts are as alleged in the assessment document. The undersigned further
understands that all evidence presented in support of remission of this civil penalty must be
submitted to the Director of the Division of Water Quality within 30 days of receipt of the notice
of assessment. No new evidence in support of a remission request will be allowed after 30 days
from the receipt of the notice of assessment.
This the day of , 2003
BY
ADDRESS
TELEPHONE

E
NPDES Permit No. NC0079758 Discharge No.
NT
. 'cility Name National Welders Supply Company
rator in Responsible Charge ( 0 R C) Jack Harrison
ertified Laboratories(1) Shealy Environmental Services, Inc.
CHECK BOX IF CRC HAS CHANGED Q Person(s) Col
Mail ORIGINAL and ONE COPY to:
ATTN: CENTRAL FI..Es
Div. OF WATER QUALITY
DENR
1617 M AIE SERVICE CENTER
RALEIGH, NC 27699-1617
D W Q Form M R- I
(Rc.vcd 7/ 2©f3©)
x
(SIGNATURE OF OPERATOR IN
ing
Month Ki U M bL 1 ''ear
County Mcckdenburg
(2)
ampl
Grade
Phone [phone]
Michael Kilpatrick
BY THIS SIGNATURE, I CERIItYTHAT
THE BEST OF MY KNOWLEDGE.
O iSLBLE CHARGE) D.
EIS REPORT LS ACCURATE AND COMPLETE TO

If the facili
rovidin
onatoring
Pore ,,,.
_ . g � n�itrs r3o
is noncompliant, please comment on corrective ixctitirls ling raker
ne table co on of imirovernenis.
lstoncomp
"re ntify, under penalty of law, that this document' and all attachments were prepared under my direction or supervision in accordance
with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquire of
the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Old Dowd Road, Ch rlotte, NC 28208
Address
0 Te
Disived oxy
45 Set
0 Nitrate
9 Total Sodium
01032 Hexavalent Chromium
O1051 Lead
01147 Seleniun
3260 t iBAS
71900 Mercury
76 Turtsid
t0BJD,
Phosphorus
O0940 "l'tta1 Chloride
i 01034 Chromium
01067 Nickel
6 Fecal Cori
Abe Spencer
Permi ee (P1 cr print or type)
Signature o'fPe
1-800-866-442.2
06/30/05
z7rnd-
Date
PARAMETER CODFS
00080 Colot 1Pt Cui
t 340 CO
O0 total Ntrugcn
007 Cyanide
O0951 Total Ptu'onde
O1037 Total Cobalt
20
2730 Total Phen
9516 PCBs 150050 Flo
155 IWXvlene
Phone Number Permit Expiration Date
Conductiv
TSS
10 Atnrncania NitrtaSen 00625 lCleldhal Nittrtsgen
L 007400927 Tota114tagnesium
01002 Total trsenie 01i7 Cadrrtium
01042 Copper 01O451txsrs
0I o92 Swine
2
01105 Aluminum
Toluene
Residual Chlorine 71880 Ptarsrraldehyde
Parameter Code assistance may be obtained by calling the Division's Point Source Compliance/Enforcement Unit at (9I9) 733-5053 or
by visiting the NPDES web site at http://h2o.enr.state.nc.us/NPDES and visiting the' Documents" section.
The monthly average for fecal coliform is to reported as a GEOMETRIC mean. Use only units designated in the reporting facility's
permit for reporting data.
ORC must visit facility and document visitation of facility as required per 15A NCAC SA .0202 (b) (5) (B).
d by other than the perntittee, delegation of signatory authority must be on file with the state per 15A NCAC 2B .0506 (b) (2)
DWQ Form MR-1 (Revised 7/2000)

Permit N©. NC0079758
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Krung on the effective date of this permit and lasting until expiration, the Ferriuttee is authorized to discharge
treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Perrnittee as specified
below:
EFFLUENT
CHARACTERISTICS
Flow
Total Suspended Residue
PH2
Acute Toxicity3
Capper
Lead
Zinc
Turbid
5
EFFLIENT LIMITATIONS
Monthly Weekly Daily
Average Average Maximtun Frequency
MONITORING RELQTTIRE
0.0143 MGD
_ Weekly
30.0 mg/I 45.0 mg/l 2/Month
Quarterly.;
Weekly
n
Sample
Type.
Sample
atlon
Grab E
Grab U, D
Notes:
1. Sample locations: E- Effluent, U. Upstream, D- Downstream.
2. The pH shall not be less than 6.0 standard units nor greater than 0.0 standard units.
3, Acute Toxicity [Fathead Minnow, 24-hour) Monitoring, Annual: refer to Special Condition A (2),
4. Monitoring once during each calendar quarter [Jan -March. Apr -June. July -Sept., Oct -Dec.).
5. The discharge shall not cause the turbidity of the receiving water to exceed 50 NTtJ. if the turbidity exceeds
these levels due to natural background conditions. the discharge cannot cause any increase in turbidity in the
receiving water.
There shall be no discharge of floating solids or visible foam in other than trace amounts,

Fast Trackorksheet
Case Number
Facility Name
Permit Number
Previous Case
in the Last
two years
LV
03
National
eiders Supply Co
NC0079758
Statutory Maximun
per violation
Number o Assessments for previous 6 DMRs
o a3 03 0 40 CI
1.00
fl.©00
Total Assessment Factor =
1.00
Exit
Total
Number Number Penalty/ Assessment
Violations Assessed Parameter Violation Violation Factor Total Penalty
0
2
Comments
TSS
TSS
4
Monthly/Quarterly
avg
Weekly avg/daily
max
$1000
$250
Grand Total Penalty
Percent of the Maximum Penalty
Authorized by G.S. 143-215.6A.
$1000.00
$0.00
$1000.00
6.00
Prepared by Richard Bridgeman

MAJOR SUPPLIER OF CRYOLNC P ELDING E0iPPMENT
Janua
Mr. Richard Bridgeman
Division of Water Quality
NC DENR, Mooresville Regional Office
919 North Main Street
Mooresville, NC 28115
2„ 2003
RE: Response to 01/13/03 Notice of Deficiency (NC D)
National Welders Supply Co., Inc.
NPDES Permit No. NC0079758
Mecklenburg County, North Carolina
Dear Mr, Bridgeman:
JAN 2 3 2003
NC Den. OF EN WHOM*
AND NATURAL 8
E REIVONAt (NPC1
This letter serves as the written response requested in the January 13, 2003 Notice of Deficiency
(NOD) received by National Welders, The NOD was issued due to the deficiencies listed in the
National Pollutant Discharge Elimination System (NPDES) Compliance Inspection Report, dated
December 31, 2002. A copy of the NPDES Compliance inspection Report was attached to the
aforementioned NOD.
The NPDES Compliance Inspection was conducted at National Welders by David Rimer of the
Mecklenburg County Department of Environmental. Protection (MCDEP) on December 30,
2002. This written response will address each of the listed deficiencies found under the Self
-
Monitoring Program section of the .NPDES Compliance Inspection Report.
Records/Reports Deficiency #.1
The June 2002 DMR listed Flow, Total Suspended Residue and pH Ibr only one day. The rest of
the month had rio monitoring data.
The June 2002 Discharge Monitoring Report (DMR) was corrected by listing monitoring data
(i.e. Daily Flow = 0.0000) for the days of the month in which no flow occurred on site. In.
addition, the NPDES Compliance Inspection Report was conducted prior to the submittal of the
November 2002 DMR. An amended copy of the June 2002 DMR was submitted with the
November 2002 DMR subsequent to the compliance inspection. Please find a copy of the
amended Discharge Monitoring Report for .June 2002.in Appendix A.

Mr. Richard Bridgeman
January 22, 2003
Page 2 of 2
Records/Re,norts De 'en #2
The October 2002 DMR listed Flow, Total Suspended Residue and pH lbr only one day. The res
ot`the month had no monitoring data.
The October 2002 Discharge Monitoring Report (DMR) was corrected by listing monitoring
data (i.e. Daily Flow = 0.0000) for the days of the month in which no flow occurred on site. In
addition, the NPDES Compliance Inspection Report was conducted prior to the submittal of the
November 2002 DMR. Subsequent to the compliance inspection, an amended copy the October
2002 DMR was submitted with the November 2002 DMR. Please find a copy of the amended
Discharge Monitoring Report for October 2002 in Appendix A.
If you have any questions, please feel free to me at [phone] ext. 317 or our environmental
consultant, Angelique Crews with. URS Corporation -NC, at [phone].
Sincerely yours,
G. Cook
agar Compressed Gases
Attachments
cc: Mr. Rusty Rozzelle (MCDEP)

t No. NC0079758
ity Narnc National Weld Supply Co
EFFLUENT
No,
Month ToNe.
I County
or in Responsible Charge ( 0 R C lack Harrison
ied Laboratories(I) Shealy Environmental Services, Inc. (2)
CHECK BOX IT ORC HAS CHANGED 0 Person(s Col
Mail ORIGINAL and ONE COPY to:
ATrN: CuaRAL FILES
DIV, OF WATER QUALITY
DENR
1617 MAI SERVICE CENTER
RALEIGH, NC 27699-1617
x
(SIGNATURE OF OPERATOR IN RESPONSLBL
BY THIS SIGNATURE, I CERTIFY T}AT THIS REPORT
THE BEST OF MY KNOWLEDGE.
ing Samples
SG�4J
DATE
AND COMPLETE TO

providing a time table
facility is noncompliant, please comment on corrective
or completion of improvements.
CneCK One QI W7C IottoWing:
Compliant
Noncompli
g taken in respect to equipment, operation, maim narice,'i tc:,
"I certify, under penalty of law, that this document and all attachments _were prepared under my direction or supervision in accordance
with a system designed to assure that qualified perscinnel properly gather and evI'ftrate the information submitted. Based on my inquire of
the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Abe Spencer
5313 Old Dowd Road, Charlotte, NC 28208
Pcrmittee Address
000I0 Temperature
OQ300 i3isso1 red Oxygen
29
�01032
01051 txa
01 147 Selenium 31616 Feral Colit`o
i 38260 h1BAS 39516 PCBs
71900 Mercury i 81551 Xylene
ntes
nt Chromium
ermine (Please print or type)
Signature
1-800•866-4422
Phone Number
Date
06/30/05
Permit Expiration Date
00076 Turbidity
0031.0 BODY
00556 Oil & Grease
00663 Total Phosphorus
00940 Total Chloride
OI034 Chromium
01067 Nickel
PARAMETER COD
00080 Color (Pt•Co)
6 00340 COD
100600 Total Nitrogen
f 00720 Cyanide
100951 Total Fluoride
( 01037 Total Cobalt
01077 Silver
1 32730 Total Phenolics
1 50050 Flow
CC082Color (ADhtn mm �5 Conduc
04400 pF1 '00530TS5
- 00610 Ammonia Nitrogen t 00625 Kjeldha
— 00745 Tota00927 Tots
' O1002 Total Arsenic
01042 Capper^
01092 Zinc
34225
5006913
l 01ry27 Cadrruum
010451ron
01105 Aluminum
34431 To
0 Formaldehyde
Parameter Code assistance may be obtained by calling the Division's Point Source Compliance/Enforcement Unit at
by visitirt2 the NPDES web site at http:/Jh2o.enr.state.nc.us/NPDES and visiting the "Documents" section.
9) 733-5083 or
The monthly average for fecal coliforrn
permit for reporting data.
d as a GEOMETRIC m
an. Use only units designated in the reporting facility's
▪ ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b) (5) (B).
• If signed by other than the pc
(D).
DWQ Form MR -I (Revised 7/2000)
, delegation of signatory authority must be on file with the state per I5A NCAC 28 .0506 (b) (2)

EFFL NT
t No. NC0079758 Discharge No.
^cility Name National Welders Supply Company Clays 1 County Mec
Month 2""Li kl
‘'::::.*.trator in Responsible Charge{(O R C) Jack Harrison Grade
ertified Laboratories(1) Shealy Ertvi+ironmental Services, Inc. (2) e
CHECK BOX IF ORC HAS CHANGED Cl Person(s) Collecting Samples
Mail ORIGINAL and. ONE COPY t
ATTN: CENTRAL FILES
DIV. OF WATER QUALITY 1 X
DENR
1617 MAIL SERVICE CENTER
NC 27699-1617
NUM
UM
Mk ,INtUM1
Comp. (c) /Grab
G)
MQ{u1oy Limo¢
J r, Q R m MIR-1
(Rc.iud 7r,20t* )
SSIGNATt.IRB v F OPERATOR iN RESPONSIBLE CHARGE) DATE
BY THIS SIGNATURE, I CERTIFY THAT THIS REPORT IS ACCURATE AND cosinETETO
THE BEST OF MY KNOWLEDGE.

Compliant
4,,Monitoring data anCliorSam piing frequencies NOT
Noncompli a
-- met peMiit requirements
If the facility is noncompliant, please comment on corrective actions being taken in res
providin a time table for completion of im,rovements.
equipment, operation, mainter)
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance
with a system designed to assure that qualified personnel properly gather and evanate the information submitted. Based on my inquire of
the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. 1 am aware that there arc significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Abe Spencer
5313 ad Dowd Road, Charlotte, NC 28208
Pennittee Address
1-800-866-4422
06/30/05
Phone Number
6)010 Tcr_nperatore
oiV-e-j[b; ygen
90574.5-5-etti-s-fibire[4:1itter
00630 N,i,lt,r_alesiTt:firites,
09924TotairSodium
01032 Flexavalent Chromium
01051 Lead 01067 Nickel
91147 Selenium 31616 Fecal Coliform
33260 NIBAS 39516 PCBs
71900Mercury 81551 Xylenc
PARAMETER CODES
v3oi2
L 00076 Turbidity COMO Color (PI -Co)
C41319 BODj 00340 COD
09556 Otl& Grease 09647Xit TotalngGrl
00665T991Phosphoros 0072o. Cyart.i.de
90•940Total Chloride -99451 -Tol Fl uori
0103-1 Chromium 0103.1 Total Cobalt
01077 Silver
32730 Total Phenolics
500.50 Flow
Permit Expiration Date
66615 Ai; ni-o-r11711Vii g n
17_ 00745 Toil Sulfide,
010-12 Copper
01092 Zinc
34225 Benzene
50060 Ridu1 Chlorine
95 Conductivity
00530 TSS
7-09625 Kjeldhal Nitrogen
00927To4,31Nfa—gnesiurri
01045 lron
r 01105 Aluminum
34481 Toluene
71350 Formaldehyde
Parameter Code assistance may be obtained by calling the Division's PointSource Compliance/Enforcement Unit at [phone] or
by visiting the NPDES web site at http://h2o.cnr.state nc_us/NPDES and visiting "Documents" section.
The monthly average for fecal coliforni is to reported as a GEOMETRIC mean. Use only units designated in the reporting facility's
permit for reporting data.
•
ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b) (5) (8).
IC signed by other than the permittee, delegation of signatory authority must be on file with the state per 15A NCAC 28 .0506 (b) (2)
(14
DWQ Form MR-1 (Revised 7(2000)

Month robeR
1 County Mecklenburg
Grade 1 Phone [phone]
2)
CHECK BOX IF ORC HAS CHANGED (D Person(s) Collecting Samples
it No. 1' C0079758 Discharge No.
National Welders Supply Company
for in Responsible Charge ( Q R C) Jack Harrison
lied Laboratories(1) Shealy Services, Inc.
Mail ORIGINAL and ONE COPY to:
ATTN: CENTRAL FILES
DIV, OF WATER QUALITY
DENR
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
(SIGNA"I`CTRE t F OPERATOR RESPONSIBLE CHARGE) D,
BY THIS SIGNATURE, I CERT1FY THAT THIS REPORT 15 ACCURATE A'u'I) COMPLETE TO
THE BEST OF MY KNOWLEDGE.

uenctes let pit requirements
Q! Sampilla uenc2es do Nei meet t tTitit rertuiretrlen
noncompliant, please comment on corre
table for completion of improvements.
ve actions being ktaken in respect to
i ompuant ,
Noncomp ant
uipment, oper Lion, a a enartc
certify, under penalty of law, that this document,and all attachments were puared under my direction or supervision in accordance
at a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquire of
the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there arc significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Old Dowd Road, Charlotte, NC 28208
PeAddress
00010 Temperature
' 00301 Dissolved Oxygen
C0545 Settleable Mauer
C0630Nitratcs/Niu tcs
1 00929 To ra1 Stadium
701032 1exavalent Chromium
01051 Lead
01147 Selenium
260 MBAS
Mercury
00076 Turbidity
00310 HOD,
00556 Oil & Gress<
00565 Total Phosphorus
1' 00940 Total Chloride
i 01034 Chromium
1 01067 Nickel
9
6
Fccat C
Xy1cn
Abe Spencer
lease print or type)
1-800-866-4422
Phone Number
PARAMETER COD
340 COD
00600 Total Nitrogen
00720 Cyanide
C0951 Total Fluoride
101037 Total Cobalt
1 01077 Silver
32730 Total
Color
pFt
1 0t37-t5 Total SuWd<
0t002 Total Arsenic
r0042 Copper
0109: Zinc
3422E Benzene
10t3�t3 Residual Chlrari
06/30/05
:rmit Expiration Date
00625 Kjeldhal N'urrog
tl0"72'7 Total M gn siu
0t027 Cadmium
0104$ n
01105 Altarninum
0 Formaldehyde
Parameter Code assistance may be obtained by calling the Division's Point Source Compliancel'Enforcemcnt Unit at (919) 733-50
by visiting the NPDES web site at http://h2o.enr,state,nc.usr. PDES and visiting the "Documents" section.
The monthly average for fecal coliforrrl is to reported as a GEOMETRIC mean. Usc only units desig
permit for reporting data.
▪ ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b
▪ If signed by other than the pe
(D),
DWQ F©rrtz b1R-1
n
aced in the reporting facility's
(5) (B).
delegation of signatory authority must be on file with the state per I5A NCAC 2B ,0506 (b) (2)

E
Permit No. NC©079758 Discharge No.
Name National Welders Supply Company
in Responsible Charge (0 R C) Jack Harrison Grade •: Phone
DENT
1 Month On ID
Class 1 County . Meckleri
led Laboratories(1) Shealy Environmental Services, Inc.
CHECK BOX IF ORC HAS CHANGED 0 Person(s) Collecting S
Mail ORIGINAL and ONE.COPY ta:"
ATTN: CENTRAL FILES
Drv. OF WATER QUALITY
DENR
1617 MAIL SERVICE CENTER
II, NC 27699-1617
x
SIGNA0 OPERATOR GE
S SIGNATURE, Y CERTIFY THAT THIS REPORT IS ACCURATE A +#D C
THE BEST OF MY ICIOWLEDGE.
0

Facility Sta
AM monitoring data and sanlin
'IYlonitoting data an -Nor saini)ling
cheek one of the following:
rmit requirements
If the facility is noncompliant, please comment on corrective actio
rovidin a time table for co don ofirnrovemcnt
irem6nta
espcct to equipment, operation, maintenance, etc,
"I certify, under penalty of law, that this document .and all attachments were pared under my direction or supervision in accordance
with,a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquire of
the person or persons who manage the system, or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there arc significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
Abe Spencer
5313 Old Dowd Road, Charlotte, NC 28208
Signature of
1-800-866-442.2
Perrnictee Address
Phone Num
00010 Temperature 1X076 TuthLdy
003CO Dissolved 0-aysien C0310 BOO)
00545 Settleable Matter 00556 Oil & Grease
C0630 Nitrates/Nitrites LT1Ptiophorus
00929 Total Sodium 00940 Total Chloride
01032 Hexavalent ChmJum 01034 Chromium
I 0105
I 01147 Selenium
38260 MBAS
r71900 Mercury
01067 Nickel
31616 Fecal Coliforrn
39516 PCBs
81551 Xylene
PARAMETER CODES
Color(
0 COD
00603 Total Nitrogen
oerno cyallide
00951 Total Fluoride
010)7 Ti1 Cob
01077 Silver
32730 Total Phenolics
50050 Flow
ase print or L
e
06/30/05
Permit Expiration Date
2 Color (ADN111) 00095 Conductivity
C0530 TSS
Ammonia Nitrogen C0623 Kjeldhal Nitrogen
74e .55_otal 5 u Ifi_dCC927 Total_M.agnesilim
; 011302 Total Arsenic 01027Cadmium
01042 Copper 01045 Iron
01092Zinc 01105 Aluminum
t 3427_5 Benzene 34431 Toluene
5C060 Residual Chlorine 71880 Formaldehyde
Parameter Code assistance may be obtained by calling the Division's Point Source Compliance/Enforcement Unit a
by visiting the NPDES web site at httplih2o.enr.statenc.us/NPDES and visiting the "Documents" section.
919
35083 or
The monthly avenge for fecal cotiform is to reported as a GEOMETRIC mean. Use only units designated in the reporting facility's
permit for reporting data.
• ORC must visit facility and document visitation of facility as required per 15A NCAC 8A .0202 (b) (5) (8).
• If signed by other than the permittee, delegation of signatory authority must be on file with the state per 15A NCAC 28 ..0506 (b) (2)
DWQ Form MR-1 (Revised m

DSVQ Form hMR•3 (Revised 7r2a00)

Mibhael F. Easley
Governor
Witham G. Ross, Jr.,Seczetary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, Director
Division of Water Quality
January 1.3, 2003
Mr. Abraham Spencer, Area Production Manager
National Welders Supply Co., Inc
Post Office Box 31007
Charlotte, North Carolina 28231
SUBJECT: NOTICE OF DEFICIENCY
Compliance Evaluation Inspection
National Welders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N.C.
Dear Mr. Spencer:
On December 29, 2002, Mr, David Rimer of -the Mecklenburg County Water Quality
Program (MCWQP) conducted an inspection at the subject facility. This inspection was
conducted as part of a cooperative working agreement between Mecklenburg County and the
Division of Water Quality. The enclosed report should be self-explanatory.
This report is being issued as a Notice of Deficiency (NOD) because of the findings
noted under the Records/Reports Program heading of the enclosed report. It is requested that a
written response, which addresses the noted deficiency, be submitted to this Office by no later
than January 31, 2003. Please direct your response to Mr. Richard Bridgeman of this Office.
Additionally, please send a copy of this response to Mr, Rusty Rozzelle of MCWQP at 700 N,
Tryon Street, Suite 205, Charlotte, N.C. 28202.
If you have any questions concerning this report or any other matters, please do not
hesitate to call Mr. Richard Bridgeman or me at this office.
Sincerely,
D, Rex Gleason, P
• •
'Water Quality Regional Supervisor
Enclosure
cc: Rusty Rozzelle, MCWQP
dir
Nationai Weiders,0079.758.1202,doc
.:::ustorner Service
800 623-7748
Mooresville Regional Office, 919 North Main Streel, Mooresville., NO 2811E
PHONE i-704) 663-1699
FAX [phone]

United States Environmental Protection Agericy. Was gto . C 20460
NPDES Compliance inspection Report Tew
North Carolina Depai tment of Environment and Natural Resources
Division of Water Quality, Mooresville Regional Office
otairv„,asiItag5ttisfgtbll:lgRihraQiilitit
NCDENR
Form -`k,PProvtd
OMB No. 2040-0003
Approval Expires
7131/85
000-104Aii*Oi::
Transaction Code NPDES Permit No. YRMO/DAY Inspection Type Inspector Facility Type
N 5 NC0079758 02/12/29
Remarks:
Inspector: Mecklenburg County Water Quality Pr gram
cti.on Work Days Facility Self -Monitoring Evaluation Rating BI
0,5
3
N
on B: Fair
QA
N
Name and Location of Facility Inspected:
National Welders Supply Company, Inc.
Lime Slurry Treatment Facility
5313 Old Dowd Road
Mecklenburg County, NC
• ntry Time:
09:00 AM
Exit Time:
0:05 AM
Date:
December 29, 2002
Name(s) of On -Site Representatives Title(s) Phone No(s):
Mr. Abe Spencer Operator in Responsible Charge 704-333-5475
Permit Effective Date:
February 1, 2002
ermit ExpirationDate:
e 30, 2005
Name and Address of Responsible Official:
Mr. Abe Spencer
National Welders Supply Company, .Inc,
P.O. Box 31007
Charlotte, NC 28231
Z Records/Reports
Facility Site Review
EffluentReceiving Waters il Labor
9A
areas are rated sans .
Signature(s) of nspector(s
David j, Rim
Title:
Area Production Manager
Phone No.
704-333-547
valuated During ns ection
urement
Self -Monitoring Program
El Compliance Schedules
ns & Maintenance
El Sludge Handling/Disposal
Pretreatment Program
Stormwater
indin &Cowmen
tory unless otherwise indicated. See Attached Sheet
Agency/Office/Telephone:
CWQP/[phone]
Signature o .'ewer: Agency/Offiee
EPA Form 356 .-3 (Reused 3-85) Previous Editions are Ohsolete
or Summa
Contacted?
Yes
S
Pollution Prevention
Z Multimedia
Other:
Date:
December 31, 2002

GENERAL:
The facility was last inspected by MCWQP on December 2, 2001. A Compliance
Evaluation Inspection report was issued on January 10, 2002.
PERMIT:
The current permit expires on. June 30, 2005. The current perrnrt properly describes the
facility and appears adequate for the waste stream being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime slurry holding pond, two seepage collection ponds, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) and daily logs were reviewed for the period
November 2001 through October 2002. The following DMRs were not properly completed:
The June 2002 DMR listed Flow, Total Suspended Residue and pH for only one day.
The rest of the month had no monitoring data.
The October 2002 DMR listed Flow, Total Suspended Residue and pH
The rest of the month had no monitoring data
or o
y one day.
Discussion with the facility representative indicated that for .tune and October 2002 discharge
only occurred on one day each month. The monitoring frequency for Flow and pH is weekly and
the monitoring frequency for Total Suspended Residue is twice monthly. Amended DMRs will
be submitted to NCDENR indicating no flow for the rest of each month..
Rating: Marginal.
FACILITY SITE REVIEW:
All of the major components of the f
properly at the time of the inspection.
FLOW MEASUREMENT:
e in service and appeared to be operating
Flow measurement is accomplished using an effluent. V-notch weir. Instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.

LABORATORY:
Shealy Environmental Services, Inc. and Simalabs, International perform analyses of
effluent samples. These laboratories are certified by the State of North Carolina to perforrn
analysis on all parameters specified in the permit. Shealy Environmental Services and Simalabs
were not evaluated under this inspection.
EFFLUENT/RECEIVING 'WATERS:
There was no discharge at the time of the inspection. The facility discharges to an
unnamed tributary to Taggart Creek, which is a Class "C" water in the Catawba River Basin,
SELF-M©NIT©RING PROGRAM:
Discharge Monitoring Reports (DMRs) and daily logs were reviewed for the period
November 2001 through October 2002. The reports indicate that the facility was meeting permit
effluent limits and monitoring requirements during this period. Except as discussion under the
Record/Reports heading, the reports indicate that all parameters are being monitored at the
required frequencies and locations.
OPERATIONS & MAINTENANCE:
The facility and grounds appeared to be properly operated and maintained. The current
overall operating strategy appears acceptable for the size and type of the facility.

MAJOR SUPPLIERS OF CRYOGENICS AND 'WELDING, EQUPMENT
P.O. Box 31007
Charlotte. NC 282 al -6098
Phone [phone]
Fax [phone]
October 29, 2002
WPCSOCC
161.8 Mail Service Center
Raleigh, NC 27699-1.618
RE- Water Pollution Control System Designation Form —
Notice of Change of Operator in Responsible Charge (ORC)
National Welders Supply Company
Charlotte, North Carolina
NPDES Permit No. NC0079758
Dear Sir/Madam:
OCT 3 0 2002
Enclosed please find the NPDES Water Pollution Control System Designation Forni. as
required by NCAC 15A.:08G,0201. This letter serves as the Notice of Change of
Operator in Responsible Charge (ORC).. As required in NCAC 15A.:08G.0202(b) "Upon
the vacancy of the Operator in Responsible Charge (OR() position for the system, the
owner of the system must notify the appropriate regional office of the Division of Water
Ouality of the vacancy, within 10 working days. If the 10 day notification was not made
in writing, then within 20 working days (9' the vacancy written notification must be
submitted to the regional office," The previous ORC, Mr, Jack Harrison, was no longer
an employee of National Welders as of October 2, 2002. This letter, and the attached
form serves as written notification within 20 working days.
The newly designated ORC, Ms, Angelique Crews of URS Corporation, is familiar with
the facility, it's wastewater treatment system, and the wastewater permit and associated
recordkeeping and reporting requirements Ms Crews will essentially be stepping into the
shoes of Mr, Harrison, as far as responsibilities as the ORC are concerned Mr, Abe
Spencer will continue to serve as the back-up ORC,
If you have any questions, please contact me at [phone] ext. 3317, Ms, Crews at
[phone], or our environmental consultant, Mr, Matt Lamb with URS Corporation
at [phone],
Sincerely,
al Welders Supply Cwpany
ell Cook
nager-Compressed Gases
Enclosures
oc.

PIPP'
Water Pollution. Control System Designation Form
wPCSQCC
NCAC 15A:08G .0201
General Information:
Pcrmittee Owner/©ricer Name: Mr. Derrell Cook
Mailing A.ddrcss: P.ax 3100
City: Charlotte State: NC, Zip: 28231
Telephone Number. (' Q4 -5475, extension 4317
rc�
Signat
Facility Information:
Date:
Facility: National Welders Supply Co.
Permit Number: NCa079758 County: Mecklenburg
! SUBMIT A SEPARATE FORM FOR EACH TYPE OF SYSTEM !
Mark (X) Type of Facility. Class (1 -- 4)
Wastewater Plant
Physical/Chemical
Collection System
X
Class
Spray Irrigation N/A
and Application N/A
Subsurface N/A
a..........................■.............****110.*E 11..eea * r***11.i.1141111r.s.auar. r.1r
Operator in Responsible Charge:
Print Name: An eligue :rick Crews Social Security # : 273-82-4708
Certificate Tpe and Grade: Grade 1 WW Certi
Work Telephone: [phone] Signature:/-'
1608
1......*.i...*..*......w.......M.........................................w..
Back -Up Operator
Print Name:
Certificate Type and Grade:
Work Telephone:
Mail or Fax to:
Responsible Charge:
Social Security
WPCSoCC
1618 Mail Service Center
Raleigh, N.C. 27699-1618
Fax: [phone]

North. Carolina
Department of Environment and Natural Resources
Water Pollution Control System Operator Certification Commission
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Coleen H. Sullins, Chairman
NCDENR
CERTIFIED MAIL February 5
RETURN RECEIPT REQUESTED
Mr. JerrelI Cook
National Welders Welders Supply Co.
P.O. Box 31007
Charlotte, NC 28231-6098
System: National Welders Supply Co.
Classification: Grade 2 Physical Chemical System
Subject: Designation of ORC and Backup ORC for 'Physical / Chemic
Permit: NC0079758
Dear Mr. Cook:
FEB 1
The Water Pollution Control System Operators Certification Commission adopted Rule 15A
NCAC SG .0306, Classification of Physical / Chemical Systems, effective April I, 1999. In
order to insure the proper operation and maintenance of these systems, this Rule requires that
all systems permitted for a physical / chemical process to treat wastewater be classified as
physical / chemical systems.
If the subject physical / chemical system consists of systems designed for (1) the rernediation
of contaminated groundwater, or (2) that utilizes a primarily physical process to treat
wastewaters, (with the exception of reverse osmosis, electrodialysis, and utrafiltration
systems), then that system shall be classified as a Grade I Physical / Chemical Water Pollution
Control System. Rule I5A NCAC. 8G .0306(a)
If the subject physical / chemical system consists of systems that utilizes a primarily chemical
process to treat wastewaters (including those systems whose treatment processes are
. augmented physical processes), they shall be classified as a Grade II Physical / Chemical
Water Pollution Control System. Reverse osmosis, electrodialysis, and utrafiltration systems
shall also be classified as Grade II Physical / Chemical Water Pollution Control System. Rule
I S,A NCAC 8G .0306(b)
If the water pollution control system that has, as part of its treatment process, biological water
pollution control system that may be classified. under Rule .0302, then that system shall be
subject to additional classification as a biological water pollution control system. Rule I5A
•
NCAC 8G .0306(c)
Any water pollution control system subject to classification under Rule .0302 of this Section,
utilizing a physical / chemical process to enhance an activated sludge or fixed growth process,
shall not be subject to additional classification. Rule 15A NCAC 8G .0306(d)
1618 Mail Service Center, Raleigh, North Carolina 27699-1618
Phone: 919 _ 733-0026 1 FAX: 919 — 733-1338
AN EQUAL OPPORTUNITY \ AFFIRM,ATNF ACTION EMPLOYER - 50% RECYCLED / 10%, POST CONSUMER PAPER

The Water Pollution Control System Operators Certification. Commission hereby classifies,
your system as a Grade 2 Physical Chemical System. This classification is based on
information you provided in the physical chemical classification survey that you completed
during the months of April -May 2001.
As required by Rule 15A NCAC 8G .0202(2) and the subject permit, a certified Operator in
Responsible Charge (ORC) and backup operator of the appropriate type must be
designated for each classified system. Your system requires an ORC and back-up
operator who hold valid physical / chemical operator certificates. Please complete and
return the enclosed designation form to this office by December 31, 2003. Failure to
designate a properly certified ORC and back-up operator is a violation of the permit issued
for this system.
In accordance with Rule 15A NCAC 8G .0406(b), individuals presently working at physical /
chemical water pollution control systems holding a valid Grade I, II, III, or IV wastewater
treatment plant operator certification, may apply for a conditional operators physical /
chemical certificate without examination. He or she may do so if, he or she has one year
experience and has successfully completed a training school sponsored or co -sponsored by the
Commission for Grade I or Grade 2 Physical / Chemical Water Pollution Control System
Operators. This conditional certification allows the bearer to act as the ORC or Backup
ORC of that System only. This conditional certification must be renewed annually per
section .0700 of the rules. The Rules for this certification as well as others is found on the
DWQ/Technical Assistance and Certification Unit web page (http://h20.enr.state.nc.us/tacu
NC AWW, A and the NC Water Pollution Control System Operators Certification
Commission are co -sponsoring three schools during calendar year 2002. Please contact NC
AINWAPVVEA [phone] for dates and registration information. If we can be of
assistance or you have any questions concerning this requirement, please call James Pugh at
919-733-0026, ext. 341..
Sincerely,
ames Pugh, Acting Supervisor
Technical Assistance and Certification Unit
Enclosures
cc: MRO
Central Files
TAC Facility Files
Mr, Kyle Bilafer

- „
E. •
Customer Service
1 600 623-7748
Monaeli F"-, 'Easley
Governor
Ross, jr,,Seoretary
Nortn Duroline Depanment E.nvironment and Natural Resources
Grecory Triorpc. Acting Director
Division of Water Quality
January 10, 2002
Mr. Abraham Spe.ncer, Area Production Manager
National Welders Supply Co., Inc
Post Office Box 31007
Charlotte, North Carolina 28231
SUBJECT: Compliance Evaluation Inspection
National Welders Supply Co., Inc.
Lime Slurry Treatment Facility
NPDES Permit No. NC0079758
Mecklenburg County, N.C.
Dear Mr.. Spencer:
On December 28, 2001..Mr. David Rimer of the Mecklenburg County Department of
Environmental Protection (MCDEP) conducted an inspection at the subject facility. This
inspection was conducted as part of a cooperative working agreement between Mecklenburg
County and th.e Division of Water Quality. The enclosed report should be self-explanatory.
If youhave any questions concerning this report or any other matters, please do not
hesitate to call Mr. Richard Bridgeman or me at this office.
Sin.cerely,
D. Rex Gleason, P.E.
Water Quality Regional Supervisor
Enclosure
cc: Rusty Rozzelle, MCDEP
DR
HEE, WQ: vat Wcilders.'C.79758.1201,doc
Moomisvilie Regional Office, 91i; Norlti Main Street, Mooresvilie, NC 2,6115 PHONE [phone]
FAX (704) 6E3-6040

United States Environmental Protection Agency, Washington DC 20460 Form. Approved
NPDES Compliance Inspection Report OMB No. 2040-0003
North Carolina Department of Environment and Natural Resources == Approval Expires
Division of Water Quality, Mooresville Regional Office NCi ENR 7131/85
A: National Data System Codit
Transaction
N
Code
5
NPDES Permit No, YYR/MO/I AY Inspection Type
NC0079758 01 / 12/28 C
Inspector
C
Fatuity Type
Rema r1ts:
Inspector: Mecklenburg County Envi
Inspection Work Days Facility Self -Monitoring Evaluation Rating
0,5 3
Se
nrnental Protection.
BI
N
on R: Facilia Data.
QA
N
,.Reserved.. , .
Name and Location of Facility Inspected:
National Welders Supply Company, Inc.
Lime Slurry Treatment Facility
5313 Old Dowd Road
Mecklenburg County, NC
Name(s) of On -Site Representatives-Titie(s)
Mr. Jack Harrison Operator in Responsible Cha
Entry Time:
2:00 pm
Exit Time:
2:30 pm
Date:
Deceniher 28. 200
—Phone No(s):
Phone: [phone]
Permit Effective Date:
February I, 1996
Peron
August :31, 2001
piration Date:
Name and Address of Responsible Official:
Mr, Abe Spencer
National Welders Supply Company, Inc.
P.O. Box 31007
Charlotte. NC` 28231
Title:
Arca. Production Manager
Phone No.
704-333-5475
ed?
Permit
® Records/Reports
® Facility Site Review
Effluent/Receiving Waters
Areas Ev
Section C:
uated During Inspection
l rtt�w` tvteasurement
l 9 Self -Monitoring Program
❑ Compliance Schedules
Laboratory=
Operations Maintenance ( Sewer Overflov<+
ED Sludge Handling/Disposal © Pollution Prevention
Pretreatment Program 0 Multimedia
Storntvv^ate r Other:
Section D: S
Finding
All areas
d satisfacto
herwise indicated. See Attached S
et'1 for Summa
urets o
David J.
Agency/Offi
phone:
MCDEP/[phone]
Date:
December 28. 2001.
gnature of Reviewe
gency/O
c
Date:
EPA Fonn 3560-3 (Revised 3-8
evious Editions are Ohso
ete

GENERA
The facility was last inspected by MCDEP on June 21, 2001. A Compliance Evaluation
Inspection report was issued on July 31, 2001.
PERMIT:
The current permit expired on August 31, 2001, The permit renewal was submitted but a
new permit has not been received. The current permit properly describes the facility and appears
adequate for the waste stream being treated.
The portion of the facility associated with the NPDES treatment works and discharge
consists of a lime slurry holding pond, two seepage collection ponds, followed by a treatment
pond where carbon dioxide is added for pH adjustment.
RECORDS/REPORTS:
Discharge Monitoring Reports (DMRs) were reviewed for the period December 2000
through November 2001 and appeared properly completed.
Records, reports, and logs are clear and well maintained; no discrepancies were noted.
FACILITY SITE REVIEW:
All of the major components of the facility were in service and appeared to be operating
properly at the time of the inspection.
FLOW MEASUREMENT:
Flow measurement is accomplished using an effluent V-notch weir. Instantaneous
weekly discharge flow calculation is accomplished by measuring the height of water flowing
over the weir and the duration of the discharge event.
LABORATORY:
ETT Environmental, Inc. and. Shealy Environmental Services, Inc perfoi in analyses of
effluent samples. These laboratories are certified by the State of North Carolina to perform
analysis on all parameters specified in the permit. ETT and Shealy Environmental were not
evaluated under this inspection.

EFFLUENT T *'FINING a`ATE S:
The effluent clear at the tune of the inspection. The Man t£ discharges t
cal tributary to Taggart Creek, which is a Class '4 „ water in the Catawba River Basin.
u
S F-MONITORING PROG
Discharge Monitoring Reports (DMRs) were rcvic mcd for the period December 2000
through November 2001. The reports indicate that the factlity meeting permit effluent li
and monitoring requirements during this period. The reports indicate that all p
being monitored at the required frequencies d locations.
OPE TIONS M NTENANCE:
The facility and grounds appeared to be properly operated and maintained The curre
Verall operating strategy appears acceptable for the size c type of the fa ilit .

ATA
NCDENR
uary ').
jERRELL G COOK
National Welders Supply Company, Inc,
P. O. Rox 31007
CHARLOITE, NC 28231.
Dear Permittee:
Michael F, Easley
Governor
William G. Ross, Jr, Secretary
North Carolina Department of Environment and Natural Resources
Kerr T. Stevens, Director
Division of Water Oualrty
j.
NATNINN
RR. 2 2001
tIF 4 4474h4:1401T
AL 4'41 AIR
Subject: Renewal Notice UIUkU
NPDES Permit NC0079758
National Welders Supply Company
Mecklenburg County
The subject permit expires on August 31, 2001, North Carolina Administrative Co( NCA(7, 211,0105(e)) requires
that an 'application for permit renewal be filed at least 180 days prior to expiration of the current permit. If you have already
mailed your renewal application, you may disregard this notice.
To satisfy this requirement, your renewal package must be sent to the Division postmarked no later than March 4, 2001,
Failure to request. renewal of the permit by this date may result in a civil assessment of at least $500,00, 1.arger penalties may be
assessed depending upon the delinquency of the request,
If any wastewater discharge will occur after August 31, 2001 (or if continuation of the permit is desired), the current,
permit must be renewed. Discharge of wastewater without a validpermit would violate North Carolina General Statute 143-215,1
and could result in assessment of civil penalties of up to $25,000 per day.
If all wastewater discharge has ceased at ,your facility and you wish to rescind this permit, contact Bob Sledge. of the
Division's Compliance Enforcement Unit at [phone], extension .547. You may also contact the Mooresville Regional
Office at [phone] to begin the rescission process
Use the enclosed checklist to complete your renewal package. The checklist identifies the items you must submit with:
the permit renewal application. If you have any 'questions, please contact me. My telephone number, fax number and e-mail
address are listed at the bottom of this page.
Sincerely,
Charles H. Weaver, J
NPDES Unit
cc: Central Files
Mooresville Regional Office, Water Quality Section
NPDES File
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 511 (fax) 919 733-0719
VISIT US ON THE INTERNET @ http://h2o enr.state,nc.usiNPDES e-mail: charles.weaver@nemailnet

NPDES Permit NC0079758
National Welders Supply Company, Inc.
Mecklenburg County
Thefollowing items are REQUIRED for all renewal packages:
A. cover letter requesting renewal of the permit and documenting n changesgc t the facility since
issuance of the last permit. Submit one signed original and two copies.
L:1 The completed. application form (copy attached), signed by the perrnittee or an Authorized
Representative. Submit one signed original and two copies.
CJ If an Authorized Representative ,such as a consulting engineer or environmental consultant) prepares
the renewal package, written documentation. must be provided showing the authority delegated to any
such Authorized Representative (see Part II.B.11,b of the existing NPDES permit).
J A narrative description of the skidge management plan for the facility. Describe how sludge (or other
solids) generated during wastewater treatment are handled and disposed. If your facility has no such
plan (or the permitted facility does not generate any solids), explain this in writing. Submit one signed
original and two copies.
The following items must be subrtted ONLY by Industrial facilities dischargingprocess
wastewater:
U industrial facilities classified as Primary Industries(see Appendices A-D to Tide 40 of the Code of
-Federal Regulations, Part 122) must submit a Prioriry Pollutant Analysis (PPA) in accordance with 40
CFR Part 122.21. If the PPA is not completed within one week of March 4, 2001, submit the
application package without the PPA. Submit the PPA as soon as possible after March 4, 2001,
The above requitement does NOT apply to municipal or non -industrial facilities.
PLEASE NOTE:
Due to a change in fees effectiveeffectiveianuary 1, 1999, there is no renewal fee re red with your
application package.
Send the completed renewal package to:
Mr. Charles H. Weaver, Jr.
NC DENR / Water Quality / NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617

WASTEWATER T* *TMENT Y EM DESIGN
S M AL FOR AUTII:RATI ON
TO CONSTRUCT
NATIONAL WELDER
CRARLOTTE, NORTH
Prepared for:
National Welding Supply Company
810 Oesoo Street
Charlotte, North Carolina
Prepared by:
AWARE Environmental Inc-
9305 Monroe Road, Suite
Charlotte, North Carolina
AEI Job No, N159-02
January 1993

1 I I A P91 IP"
ENVIRONMENTAL INC.
11`11 tft=
January 20, 1993
Ms. Coleen Sullins
North Carolina Department of Environment
Health and Natural Resources
Division of Environmental Management
Permits and Engineering Unit
512 N. Salisbury Street
Raleigh, NC 27611
Re: National Welding Supply Company
Authorization to Construct
NPDES Permit No. NC0079758
AEI Job No. N159-02
Dear Ms. Sullins:
The purpose of this submittal is to provide information required
by the North Carolina Department of Environment, Health and
Natural Resources (NCDEHNR), Division of Environmental Management
(DEM) to enable the issuance of an Authorization to Construct
(ATC). The proposed wastewater treatment facility will be
located at the National Welding Supply Company (NWSC) facility at
5313 Old Dowd Road, Charlotte, NC (Old Dowd facility). The
treatment facility will discharge into a tributary of Taggart
Creek under conditions of NPDES Permit No. NC0079758. The
enclosed information and documentation for the treatment system
was prepared by AWARE Environmental Inc. (AEI) in cooperation
with and on behalf of NWSC.
BACKGROUND
NWSC operates an acetylene production and gas distribution center
at the Old Dowd facility. In the past, carbide lime, a by-
product of the acetylene production operations, was stored in a
holding basin at the facility. Seepage and associated stormwater
from the holding basin periodically enters the tributary to
Taggart Creek. National Welders in cooperation with the NCDEHNR-
Mooresville Regional Office and the Mecklenburg County Department
of Environmental Protection is currently proceeding with programs
to control the high pH seepage and stormwater, and for the
recovery/removal of the carbide lime stored in the holding basin.
PROPOSED TREATMENT SYSTEM
The primary functions of the proposed treatment system will be to
provide a basin for collection of high pH seepage and stormwater
associated with the lime storage basin, provide a reservoir for
water to be used in lime recovery operations, and provide pH
935 VONROL ROAD • 7311i1E j CHAVILOT 1 F N C2rQ10, • TI-.11-j.PHONL 16q"J. • FAX UN). (345 1

neutralization and solids separation for the collected water
prior to intermittent, manually controlled discharges to the
tributary of Taggart Creek.
Normally the collected seepage and stormwater will be used in
lime recovery operations and the water level in the treatment
basin will be minimized. However, discharges to the tributary
from the treatment basin using the water re -use pumping system
may be necessary when the lime recovery system is out of service
for a prolonged period. The seepage treatment system process
flow diagram is presented as Drawing EN-3 contained in the
Specifications for the Seepage/run-off Control Plan - Seepage
Treatment Basin Design document given in Attachment A. A summary
of the design basis for the seepage treatment basin is presented
in Attachment B.
The proposed pH control system utilizes carbon dioxide (CO2) for
seepage neutralization. The use of CO2 was chosen for pH control
due to its ready availability, familiarity of use and handling by
NWSC, and non -hazardous characteristics.
To evaluate whether the use of CO is appropriate for this
application and will enable perinif compliance, a treatability
study was conducted by AEI. The treatability study data
collection and evaluation included CO2 requirements, CO2 transfer efficiency and calcium carbonate production at various rates of
CO2 addition and worst case pH conditions. The study was
performed at the National Welders facility on September 2, 1992.
The methodology used in the study, the study results, a
discussion of the conclusions reached in the study and the pH
neutralization system design criteria are presented in the
treatability study report given in Attachment C.
The current effluent limitations in the National Welders NPDES
permit (NC0079758) include flow (0.0143 MGD monthly average),
total suspended solids (30 mg/L monthly average and 45 mg/L daily
maximum), and pH (6.0 s.u. - 9.0 s.u.). Based on the results of
the treatability study, permit compliance for pH and TSS is
predicted. Test results indicate effluent pH values should range
from 7.5 s.u. to 7.8 s.u. and TSS concentrations from 1 mg/L to
18 mg/L (based on thirty (30) minute settling time).
Calcium carbonate precipitate produced in the pH neutralization
process will be collected in the treatment basin and periodically
incorporated into the carbide lime recovered from the holding
basin. The quantity of calcium carbonate production will be more
dependent on the anticipated dry weather seepage flow rather than
total permitted flow. During rainfall events, CO2 addition will
not likely be required.
The seepage treatment system design drawing with equipment
specifications, and the system details and profiles are given in
Drawing Nos. EN-1 and EN-2, respectively. As shown on these
drawings, a carbonator was included in the pH control system

design to enable pH neutralization during periods when basin
water level restricts the use of the CO, diffuser system. A
summary of the major equipment/oomonens of the treatment system
is Provided in Attachment D.
Thank you for your assistance in this matter. Because of the
nature and current need for the implementation of this treatment
system, your review of the enclosed information and issuance of
an ATC for the system is requested at your earliest convenience.
If you have any questions or concerns, please do not hesitate to
call r. Gerald Carver or Mr. Delane Burch of NWSC at 7 0 4
5475 or myself at [phone].
Sincerely,
AWARE Environmental Inc.
David L. Wagoner
Project Manager
Attachnnents
cc: Gerald Carver, NWSC
Delane Burch, NWSC
Fred Wu, AEI
Bob Stein, AEI w/o etch.
Ned Fiss, AEI /o etch.
322

SPECIE ICATIONS
ATTACHDIENT A
FOR THE SEEPAGE/RUN OFF CONTROL PLAN
PHASE II
SEEPAGE TREATMENT
BASIN DESIGN

SPECIFICATION
FOR
SFEPAOF/RON-OFF CO
PHASE II
SEEPAGE
0
National Welders Supply Carnpanr, Inc,
Charlotte, North Carolina
Prepared B3
AWARE nvi anmental Inc
9305 Monroe Road, Suite
Charlotte, North Cat°1ina
AI Job No. N1- 02
December 1992

02000
02100
02200
0221
02260
02270
02485
►n No.
TABLE OF CONTENTS
Treatment Basin Construct on'
Site Clearing
Earthwork
Rip Rap
Topsoiling and finFinishGrading
Soil , Erosion and S diment Control
Seeding
Page
CONTRACT DRAW
Drawing No.
Eli-1
EN-2
EAT-
G
peso ipt.en
2
2
9
2
2
2
3
CoverSheet*
Seepage Treatment System*
Details and profiles*
Seepage 'treatment System,
Process Flow Diagram
Indicates drawing ie bound e p retelyrom spec c t on.

02000-1
SPECIFICATION 02000
TREATMENT BASIN CONSTRUCTION
Site Preparation
The foundation area shall be cleared of all trees, stumps,
roots, brush, boulders, sod, and debris. All channel banks
and sharp breaks shall be sloped to no steeper than 1:1.
All top soil containing excessive amounts of organic matter
shall be removed. Existing stream channels crossing the
foundation area shall be deepened and widened as necessary
to remove all stones, gravel, and sand, and to accommodate
compaction equipment. The surface of the area on which fill
is to be placed will be scarified before placement of
embankment material.
2. Cutoff Trench
The cutoff trench shall be excavated to lines and grades
shown on the plans. The cutoff trench shall be backfilled
with suitable material and compacted in the same manner as
specified for the earth embankment. The trench shall be
free from standing water during backfilling the cutoff and
compaction operations. The side slopes shall be no steeper
than 1:1. The bottom width shall be wide enough to permit
operation of compaction equipment.
Embankment shall be constructed in accordance with
specification 02200. Place and compact fill material in 6
to 8-inch continuous layers over the entire length of the
fill area. The collection pond embankments shall be
compacted to 95 percent of maximum dry density by ASTM 698
as specified for Type A density control under specification
02200.
Erosion Control During Construction
Direct surface water away form unvegetated areas. Stabilize
the emergency spillway embankment and all other disturbed
areas above the crest of the principal spillway immediately
after construction.
4. Borrow Areas
All borrow areas outside the pool area shall be graded,
seeded, and left in such a manner that they are well drained
and not subject to erosion. If possible, they should drain
through the sediment basin.

Vegetative Protect on
02000-02
A protective cover of vegetation shall be established on all
exPosed surfaces of the embankment,,, spillway, and orro
area outside the storage area.
Seed bed preparation, seeding, fertilization, and mulching
shall comply with specification 0248
Maintenance;
Check sediment basins after periods of significant runoff.
Remove sediment and restore the basin to its original
dimensions when sediment accumulates.
Check the emba ,ent, spillways, and inlet for erosion
damage, and inspect the embankment for piping and
settlement. Make all necessary repairs i ediatel. Remove
all trash and other debris from the treatment basin area.

SPECIFICATION 02100
SITE CLEARING
. General
02100-1
This section includes site clearing and tree protection for
construction and completion of all work under this contract.
2. Duality Standards
Perform work in accord with OSHA requirements and
requirements of Environmental Protection Agency, State and
local governmental requirements.
Protection
Protect existing trees and other vegetation outside of
grading limits against unnecessary cutting, breaking or
skinning of roots, skinning and bruising of bark, smothering
of trees by stockpiling construction materials or excavated
materials within drip line, excess foot or vehicular
traffic, or parking of vehicles with drip line. Provide
temporary fences, barricades or guards as required to
protect trees and vegetation to be left standing.
Provide protection for roots over 1-1/2 inch diameter that
are cut during construction operations. Coat cut faces with
an emulsified asphalt, or other acceptable coating,
especially formulated for horticultural use on cut or
damaged plant tissues. Temporarily cover all exposed roots
with wet burlap to prevent roots from drying out; provide
earth cover as soon as possible.
Repair trees damaged by construction operations, in manner
acceptable to Engineer.
4. Clearing and Grubbing
Remove trees, shrubs, grass, weeds, and other vegetation,
improvements, or obstructions that interfere with new
construction. Removal includes new and old stumps of trees
and their roots.
Clearing consists of removal from above surface of existing
ground all trees, shrubs, brush, downed timber, rotten wood,
heavy growth of grass and weeds, vines, rubbish, structures
and other debris within the clearing limits.
Grubbing consists of removal of stumps, roots, root mat
logs, and debris encountered within limit of clearing. In
cut areas, ground shall be totally grubbed. In fill areas
where fill is less than 3 feet in depth, ground shall be
totally grubbed.

02100-2
Fill depressions caused by clearing and grubbing operations
with satisfactory soil material unless further excavation or
earthwork is indicated. Place fill material in horizontal
layers not exceeding 6 inches loose depth and thoroughly
compact to a density equal to adjacent original ground.
Disposal of Was e Materials
Burning of combustible cleared and grubbed materials is not
permitted on Owner's property.,
All rock, concrete slabs, masonry, excavated stumps, logs,
roots, or other organic matter on site shall be disposed of
on a permitted bury pit as directed by Engineer. Prior to
placement, all rock shall be broken up so that it is not
more than twenty-four (24) inches in any dimension. Deposit
material in trenches, evenly distribute and fill all voids
completely before filling another layer. Remove all
material placed in areas not approved by Engineer.

SPECIFICATION 02200
EARTHWORK
General
02200-1
Earthwork shall include the loosening and removing,
transporting, storage, backfilling, and all handling of
material of either natural soils, deposited soils, rock or
boulder for the construction and completion of all work
under this Contract.
2. Associated Definitions
"Earth" includes all materials such as sand, gravel, clay,
loam, muck, soft or disintegrated rock, not requiring
blasting, barring or wedging from their original beds, and
specifically excludes all ledge or bed rock, and individual
boulders or masonry larger than one-half cubic yard in
volume.
"Subgrade" is earth material on which structures or other
materials are to be placed.
"Backfill" includes selected materials for the backfilling
of all excavations and trenches up to the original surface
of the ground or to other grades as may be shown or
directed.
"Spoil" includes surplus excavated materials not required or
suitable for backfills or embankments.
"Embankments" include fills constructed of selected
materials above the original surface of the ground.
"Rock" includes all pieces of ledge or bed rock, boulders,
or masonry larger than one-half cubic yard in volume
requiring blasting, barring, or wedging for removal from
their original beds.
Excavation
Excavations shall be of sufficient size, and only of
sufficient size, to give suitable room for the proper
construction of structures and appurtenances, including
allowances for sheeting, dewatering, and other similar work
necessary for completion of the Contract.

02200-2
Excavations for structures shall be made only to the lines
and grades shown on the Plans, specified, or directed.
The trenches in which pipelines are to be constructed, shall
be excavated in all cases in such manner and to such depths
and widths as will give suitable room for the pipelines
which the trenches are to contain for sheeting, pumping, and
draining, and for removing the material not suitable for
pipe subgrade.
Trenches for pipes shall be not less than 6 inches wider
than the pipe in the clear on each side. Width of trenches,
measured 18 inches above the top of the pipe shall not
exceed 12 inches on each side, except sheered trenches
wherein this width shall not exceed 24 inches.
Under ordinary conditions excavation shall be open cut.
4. Rock Excavation
Where rock is encountered, the excavation shall be done in
accordance with the applicable provisions hereof. For
concrete structures, rock shall be excavated only to the
bottom of the structures.
Blasting shall not be allowed on site in any condition.
Rock shall be removed by drilling, boaring, wedging, or
other mechanical methods.
Excavation Below Subgrade
In case the materials encountered at the limiting subgrades
are not suitable for proper support of structures, the
Contractor shall excavate from the limiting subgrades shown
or specified, to such new lines and grades as will be
ordered by the Engineer. Excavation below subgrade shall be
done only upon express orders of the Engineer. Unless
otherwise shown or specified, the limiting subgrade for
structures shall be the underside of structures at the
footing lines.
The additional space excavated below the subgrade shall be
refilled with granular materials, 3000 psi concrete or with
other materials as the Engineer may direct.
The additional work and materials will be paid for by change
order.

02200-3
Embankment
Embankments shall be constructed to establish lines and
grades at the locations shown on the Plans and as directed
by the Engineer. Embankment materials shall be natural soil
free from excessive moisture, frost, stumps, trees, roots,
sod, muck, marl, vegetable matter or other unsuitable
materials. Embankment material shall be obtained from
acceptable materials on the site or from approved borrow
pits and shall be well graded from fine to coarse with a
minimum content of silt. All materials shall be suitable
for compaction in layers not exceeding 8 inches in thickness
and shall remain stable when wet.
The entire surface to be covered with embankment shall be
stripped of all grass, vegetation, topsoil, rubbish, or
other unsuitable materials and scarified before any
embankment material is placed.
In general, embankment materials shall be placed in
horizontal layers not exceeding 8 inches in thickness,
measured after compaction, and shall be thoroughly
compacted. Stones, if any, shall not exceed 6 inches in
greatest dimension and shall be will distributed throughout
the mass. Where embankments are to be constructed across
ground which will not support the weight of the construction
equipment, the fill shall be constructed by placing 3,000
psi concrete until a satisfactory bearing is obtained. In
areas upon which structures are to be built, the embankment
materials shall be placed in layers not exceeding 6 inches
in thickness, measured after compaction. All embankments
shall be subject to Density Control.
7. Unauthorized Excavation
Whenever excavations are carried beyond or below the lines
and grades shown on the Plans, or as given or directed by
the Engineer, all such excavated space shall be refilled
with 3000 psi coperete for collection pond excavation.
Granular material may be used for other pipeline over
excavation. All material which slides, falls, or caves into
the established limits of excavations due to any cause
whatsoever, shall be removed and disposed of at the
Contractor's expense.
No extra compensation will be paid the Contractor for any
materials ordered for refilling the void areas left by a
slide, fall, cave-in, or any other unauthorized excavation.

02200-4
8. Removal of Water
The Contractor shall at all times during construction,
provide and maintain proper and satisfactory means and
devices for the removal of all water entering the
excavations, and shall remove all such water as fast as it
may collect, in such manner as shall not interfere with the
prosecution of the work or the proper placing of pipelines,
masonry, or other work.
Removal of water includes the construction and removal of
cofferdams, sheeting and bracing, the furnishing of
materials and labor necessary therefore, excavation and
maintenance of ditches and sluice -ways and the furnishing
and operation of pumps, wellpoints, and appliances needed to
maintain through drainage of the work in a satisfactory
manner.
Water shall not be allowed to rise over or come in contact
with any masonry, concrete or mortar, until at least 24
hours after placement, and no stream of water shall be
allowed to flow over such work until such time as the
Engineer may permit.
Unless otherwise specified all excavations for structures
and pipelines which extend to or below the static ground
water elevations shall be dewatered by lowering and
maintaining the ground water to an elevation at least two
feet below the excavation subgrade.
Where the presence of fine grained subsurface materials and.
a high ground water table may cause the upward flow of water
in to the excavation with a resulting quick condition, the
Contractor shall install and operate a wellpoint system to
prevent the upward flow of water during construction.
Where wellpoints are used, the ground water shall be lowered
and maintained continuously (day and night) at a level not
less than two feet below the bottom of the excavation.
Excavation shall not be permitted at a level lower than two
feet above the water level as indicated by the observation
wells.
The effluent pumped from the wellpoints shall be examined
periodically by qualified personnel to determine if the
system is operating satisfactorily without the removal of
fines.
The water level shall not be permitted to rise until
construction in the immediate area is completed and the
excavation is backfiiled to the original grade.

02200-5
Stand-by gasoline or diesel powered equipment shall be
provided so that in the event of failure of the operating
equipment, the stand-by equipment can be readily connected
to the system.
Wellpoints shall be installed in the center of a sand wick
drain which shall be placed by means of a sanding shell or
other approved means to provide a sand core not less than 10
inches in diameter.
Detached observation wells of similar construction to the
wellpoints shall be installed at intervals of not less than
50 feet along the opposite side of the trench from the
header pipe and line of wellpoints, to a depth of at least 5
feet below the proposed excavation. In addition, one
wellpoint in every 50 feet shall be fitted with a tee, plug,
and valve so that the wellpoint can be converted for use as
an observation well. Observation wells shall be not less
than 1-1/2 inches in diameter.
Water pumped or drained from excavations, or any sewers,
drains, or water courses encountered in the work shall be
disposed of as directed by the engineer.
Any damage caused by improper handling of water shall be
repaired by the Contractor at his own expense.
9. Storage of Material
Topsoil suitable for final grading shall be removed and
stored on the site separately from other excavated material.
10. Sheeting and Bracing
The Contractor shall furnish, place and maintain such
sheeting, bracing and shoring as may be required to support
the sides and ends of excavations in such manner as to
prevent any movement which could, in any way, injure the
pipe, sewers, masonry, or other work, or endanger existing
structures, pipes or pavements; cause the excavation limits
to exceed the rights -of -way limits; or to occasion a hazard
to persons engaged on the project or the general public.
In no case will bracing be permitted against pipes or
structures in trenches or other excavations. All timber
sheeting and bracing shall be sound and straight, free from
cracks, shakes, and large or loose knots, with dressed edges
where directed, and shall otherwise conform with National
Design Specifications for Stress Grade Lumber for lumber of
a minimum fiber stress of 1,200 pounds per square inch.

02200-6
Steel sheeting and bracing shall be sound and shall conform
with ASTM Designation A-7, with a minimum thickness of 3/8
inch.
Sheeting shall be driven as the excavation progresses, and
in such manner as to maintain pressure against the original
ground at all times. The sheeting shall be driven vertical
with edges tight together, and all bracing shall be of such
design and strength as to maintain the sheeting in its
proper position.
If, in the judgement of the Engineer, the sheeting or
supports furnished are inadequate or unsuited for the
purpose, he may order such sheeting or bracing to be
replaced or additional sheeting and bracing to be installed.
Any sheeting and bracing ordered and so installed for such
purpose shall be furnished and installed at the expense of
the Contractor.
Whether or not the Engineer orders any additional sheeting
or bracing to be installed or unsuitable sheeting or bracing
to be replaced, the Contractor shall be solely responsible
for the adequacy of all sheeting and bracing.
In general, all sheeting and bracing, whether of steel,
timber of other material, used to support the sides of
trenches or other open excavations, shall be withdrawn as
the trenches or other open excavations are being refilled.
That portion of the sheeting extending below the top of a
pipe or sewer shall be withdrawn, unless directed, before
more than six inches of earth is placed above the top of the
pipe or sewer and before any bracing is removed. The voids
left by the sheeting shall be carefully refilled with
selected material and rammed tight with tools especially
adapted for the purpose, or as otherwise approved.
The Engineer may order the. Contractor to delay the removal
of sheeting and bracing, if, in his judgement, the installed
work has not attained the necessary strength to permit
placing of backfill.
If, to serve any purpose of his own, the Contractor files a
written request for permission to leave sheeting or bracing
in the trench or exaction, the Engineer may grant such
permission, in writing, on condition that the cost of such
sheeting and bracing be assumed and paid by the Contractor.
In case sheeting is left in place, it shall be cut-off or
driven down as directed so that no portion of the same shall
remain within 12 inches of the finished street or ground
surface.

02200-7
11. Backfilling
Backfilling around structures shall not be commenced until
directed by the Engineer. Backfill around structures may be
placed by machine, provided the work shall be done carefully
to prevent damage to the structure. In no case shall
backfill materials be allowed to fall directly on a
structure until at least 12 inches of hand placed material
has been placed thereon and compacted.
Backfill around structures shall be deposited in horizontal
layers not more than one foot in thickness and shall be
compacted to prevent settlement.
All excavations shall be backfilled to the original surface
of the ground or to such other grades as may be shown,
specified or directed. Backfilling shall be done with
suitable excavated materials, approved by the Engineer,
which can be satisfactorily compacted during refilling of
the excavations. In the event the excavated materials are
not suitable, special backfill obtained from approved borrow
pits shall be used for backfilling. Frozen earth shall not
be used for backfilling.
Backfilling shall be subject to Density Control.
12. DENSITY CONTROL
All earthwork specified for Density Control shall have a
minimum dry density as follows:
A
(All areas under
pavements road -
roads surfaces,
within highway
rights -of -way, or
as specified)
MINIMUM COMPACTION
Soil Type Density
Cohesive Soils
95 Percent of
maximum dry
density by ASTM D698
Cohesionless Soils 75 Percent of
maximum relative
density by ASTM
D2©49

02200-8
8
(Under turfed,
sodded, seeded,
non -traffic areas
as specified)
Insure backil ma
(3) percent of opt
placement.
e
Cohesive Soils
85 Percent of
maximum dry
density by ASTM D698
Cohesionless Solis 40 Percent of
maximum relative
density by ASTM
D2049
ials have moisture content within three
m moisture content at time of
Compaction curves shall be developed for each type of soil
proposed for use. The development of the curves from the
standard density or compaction test shall be done by an
approved testing laboratory at the Contractor's expense.
Field control samples shall be taken as required during
construction. Such samples shall be tested by an approved
laboratory at the Contractor's expense. If the soil is
suitable, in the opinion of the Engineer, Proctor needle
tests may be substituted for the field control samples. In
such event, the development of the compaction curves shall
include a calibration for the needle test, and the
Contractor shall furnish a needle and suitable needle points
for field use.
For embankments, one test will be taken for approximately
every 500 cubic yards of material placed unless field
conditions dictate that additional tests are required.
Each layer of material shall be thoroughly tamped or rolled
to the required degree of compaction by sheepsfoot or
pneumatic rollers, mechanical tampers, or vibrators, unless
a satisfactory compaction is obtained by the travel of
trucks and earth moving machines. Successive layers shall
not be placed until the layer under construction has been
thoroughly compacted.
Trucks or other heavy equipment shall not be operated over
pipelines until a minimum of 24 inches of backfill above the
crown of the pipe has been placed and properly compacted by
tampers or other approved methods. Operation of any
construction equipment over the pipe, regardless of the
depth of backfill should be done with care and at the
Contractor's risk.

02200-9
Where required, the contcontractorshall, at his own expense,
add su sufficientwater during rolling and tamping to assure
complete con lida ion of . fill material- If, due to a
rain or other causes the material is too wet for
satisfactory cm i n, it shall be allowed ry as
re iced before compaction.
In general, a lspoil material shall be l: n the site.
The surface o all spoil placed on e site shall be rad
and dressed. No unsightly mounds or heaps shall be left on
completion of work.

SPECIFICATION 02215
RIP RAP
general
02215-1
Work required in project includes Rip rap for slope
protection.
2. Duality Standards
Contractor shall furnish and install Class 1 rip rap which
complies fully with the requirements of N.C. Department of
Transportation's Standard Specifications for Roads and
Structures. The Contractor may use any rock which is
excavated during construction for rip rap if he performs
adequate tests to prove that the rock complies with the N.C.
Department of Transportation's requirements for Class 1 rip
rap.
Materials
Provide stone which is durable and of such quality that it
will not disintegrate on exposure to water to weathering and
free from structural fractures and defects. Insure stone
does not contain shale, unsound sandstone, or other material
which will readily disintegrate.
Provide stone graded within limits specified for Class 1 rip
rap.
4. Installation
Foundation Preparation. Place rip rap on areas trimmed and
dressed to conform to cross sections indicated with
tolerance of two (2) inch from theoretical slope lines and
grades. Bring areas below allowable minus tolerance limit,
to grade by filling embankment material similar to adjacent
material. Compact to density specified for backfill. Do
not place any stone material on prepared base prior to
inspection and approval to proceed.
Placing. Place rip rap on prepared foundation within limits
indicated. Place on prepared base to produce a well -graded
mass of rock with minimum particle percentage of voids, to
required thickness and grades. Place to full course
thickness at a single operation to void displacing the
underlying material. Do not place stone in layers.
Distribute larger stones and the entire mass in final
position, roughly graded to conform to approximate gradation

022152
specified. Insure finished rip rap is free free
objectionable pockets of smaller stones or cluster of larger
stone. Hand place and rearrange individual stones as
necessary to obtain a reasonably well -graded distribution.
Insure a final tolerance of within three (3) inches from
indicated slope and grade lines. Insure that neither
tolerance extreme is continuous over an area greater than
200 sq. ft. Distribute stones throughout the mass by
selective loading at quarry. Do not place stone by dumping
into chutes or by similar methods likely to cause
segregation. Place stone protection in conjunction with
enoankment construction of toe as necessary to prevent
mixture of embankment and stone protection materials.
Maintain stone protection until accepted, replace any
displaced material to lines and grades shown.

PECIFICATION 02260
TCPSOILING AND FINISHED GRADING
General
02260-1
This section includes finished grading and topsoiling and
applies to all areas within limits of grading and all areas
outside limits of grading which are disturbed in the course
of the work.
2. Ouality Standards
Finish grading tolerance: 0.1 FT plus/minus from required
elevations for bottom of basin, top of berm, and overflows
structure.
Materials
Topsoil: Original surface soil typical of the area, capable
of supporting native plant growth.
A. Use existing topsoil stockpiled under Specification
02100.
B. Verify amount of topsoil stockpiled and determine
amount of additional topsoil, if necessary, to complete
work. If the amount of topsoil stockpiled is less than
amount necessary for the work, furnish all additional
topsoil required.
4. Preparation
Correct, adjust, and/or repair rough graded areas by:
A. Cutting off mounds and ridges.
B. Filling gullies and depressions.
C. Performing other necessary repairs.
D. Bringing all sub -grades to specified contours, even and
properly compacted.
Loosen surface to depth of 2 inches, minimum.
F. Remove all stones and debris over 2 inches in any
dimension.

02260-2
Topsoil
Do not place topsoil when su grade s either wet or frozen
enough to cause clo ding.
Spread topsoil to compacted depth 0f 4 inches f`0r ail
disturbed earth areas.
Mack finished surface free of atones, sticks, car other
materials 1 inch or more in any dimnirn
Make finished surface smooth and true to required grades
Restore areas occupied by stockpiles to condition of rest of
finished work.
ce Lance
Upon ccm leticn c toicsollingt obtain Engineer's acc+eptenc
of grade and surface.
Make teat holes, where directed, td verif r proper p
and thickness of topsoil.
acement

SPECIFICATION 02270
SOIL EROSION AND SEDIMENT CONTROL
1. General
02270-1
This section includes the furnishing and installation of all
soil erosion and sediment control items, including but not
limited to sediment basins, earth berms, silt fences,
seeding, sediment traps, stone filter, swales, straw bales,
interceptor dikes, etc., as shown on drawings and as
specified, in accordance with provisions of the Contract
Documents, and completely coordinated with work of all other
trades.
Erosion control methods shall comply with City of Charlotte
Engineering Department sediment control standards and
specifications, and follow the North Carolina Administrative
Code, Title 15, Chapter 4, Sedimentation Control.
The Contractor shall have the sole responsibility of
furnishing all labor, materials, equipment, service,
supplementary or miscellaneous items and appurtenances and
devices incidental to or necessary for complete soil erosion
and sediment control.
2. DESCRIPTION OF PROJECT AREAS
Refer to Contract Drawings.
SEDIMENT CONTROL MEASURES
The Contractor shall provide sediment control measures in
the locations shown on the Contract Drawings and as required
as construction progresses.
Contractor shall make provisions to provide and implement
the following measures for sediment control.
A. A permanent vegetative cover shall be established on
all disturbed areas except those areas which, due to
poor drainage or other conditions, will not support a
vegetative cover. Cover is to be established within 30
days of completion of construction except in instances
where Contractor is unable to continue his work without
moving equipment across the undisturbed area. These
areas shall be mulched to prevent erosion until work
progresses to the point where access to the
construction site can be gained without moving
equipment across the disturbed area. The area should

02270-2
then be imediately seeded, fertilized, and mulched in
accordance with Section 02485.
Discharge from dewatering operations shall not be
pumped directly onto the ground where it will result in
siltation of nearby watercourses. The discharge may be
pumped to low-lying flat areas where sediment will
settle out, filtered through a gravel bed or discharged
into a settling pond where noticeable sediment would be
allowed to settle before release to a watercourse.
C. Silt fences shall be provided as directed by the
Engineer in areas shown on the plans. The silt fences
shall be installed prior to beginning construction and
shall remain in position until satisfactory vegetative
cover has been established and the Engineer has
approved its removal.
The silt fences shall be constructed in compliance with
Charlotte/Mecklenburg Standard 30.06.
The Contractor shall repair any silt fence which is
damaged or deteriorated at his own expense. All silt
accumulation shall be disposed of by spreading over the
construction area, taking care not to bury any
vegetative cover. After the Contractor has spread the
sediment satisfactorily, he shall remove the silt fence
as approved by the Engineer and dispose of it away from
the construction site.

e
ex -al
SPECIFICATION 02485
SEEDING
02485-1
Work consists of soil preparation, fertilizing,
seed bed preparation, grass seeding, mulching, etc.,
complete, for all areas within limits of grading in
accordance with the contract.
2. aterials
A. Grass Seed. Fresh, clean, new -crop seed labeled in
accord with current U.S. Department of Agricultural
Rules and Regulations under Federal Seed Act.
Permanent grass seed shall be 99 percent pure, 85
percent germination seed, max. 2 percent weeds and
foreign material, tested with six (6) months of
planting. Seed shall be Kentucky 31 Fescue. Quantity
shall be 400 pounds per acre.
B. Mulch. Provide clean, weed -free, threshed grain straw
or hay locally available mulch material. All mulch
shall be reasonable free from mature seedbearing
stalks, roots, or bulblets of Johnson Grass, Nutgrass,
Sandbur, Wild Garlic, Wild Onion, Bermuda Grass,
Crotalaria, and Witch. Weed, and free from any excessive.
amount of restricted noxious weeds as defined by the
North Carolina Board of Agriculture at the time of use
of the mulch. The mulch shall not contain any material
which violates State and Federal domestic plant
quarantines. Do not use mulch material which is fresh
or excessively brittle, or which is decomposed and will
smother or retard growth of grass. Quantity for grain
straw shall be 3,300 pounds per acre, and 65 bales per
acre for hay. Mulch shall be held in place by spraying
with an asphalt emulsion or a jute netting may be
placed over the straw on slopes that have a ratio
grater than 3 to 1.
C. Fertilizer. Provide commercial fertilizer of 10-10-10
analysis, meeting applicable requirements of State and
Federal Law. Cyanamic compounds or hydrated lime are
not permitted in mixed fertilizer. Deliver fertilizer
to site in original containers and bearing the
guaranteed analysis. Quantity shall be 1,000 pounds
per acre. An additional application of 30-50 pounds of
nitrogen per acre is required within three (3) to

02485-2
twelve (12) months to establish grass plantings.
D. Limestone. Not required.
E. Asphalt Binder. Emulsified asphalt per NC DOT Standard
Specification for Roads and. Structures.
Water. Potable, free of substances harmful to growth
of grass.
Soil Preparation.
A. Loosen surface to a minimum depth of 4 inches. Remove
stones over 1 inch in any dimension and roots, rubbish,
and other extraneous matter.
B. Limestone. Not required.
C. Loosen areas to be seeded with a double disc or other
suitable device if soil has become hard or compacted.
Correct any surface irregularities in order to prevent
pocket or low areas which will allow water to stand.
D. Fertilizing. Distribute fertilizer uniformly over
areas to be seeded. ❑se a suitable distributor.
Incorporate fertilizer into soil to a depth of at least
2 inches by discing, harrowing, or other approved
methods. Clean surface of stones or other substances
which will interfere with turf development or
subsequent mowing operations.
F. Grade to a smooth, even surface with a loose, uniformly
fine texture. Roll and rake, remove ridges and fill
depressions, as required to meet finish grades. Limit
fine grading to areas which can be planted soon after
preparation.
Restore lawn areas to specified condition if
otherwise disturbed after fine grading and be
planting.
4. Seeding
r
ded or
e
Do not use seed which is wet, moldy, or otherwise damaged.
Perform seeding work from February 15 to April 15 for spring
planting, and August 15 to October 15 for fall planting,
unless otherwise approved by Engineer. Employ methods of
sowing satisfactory to Engineer using approved mechanical

02485-3
powe driven drill or e r , or mechanical an r ,
or other approved equipment. Distribute seed evenly over
entire area at rate as ci' , 50 percent sown in one
direction, remainder at right, angles to first sowing. Stop
work when work . t n beyond most favorable plantingseason
for species designated, or when satisfactory results cannot
be obtained cause of rcn ,' i is winds, excessive
moisture, or other factors. Resume work only when favorable
condition develops.
Lightly rake seed into sail olla ed by light rollingar
xlt ac.n.
l ediately protect seeded a eas against erosion by
mulching. rea mulch evenly andlightly to a depthof
or 5 tr:.ws Take care not to completely cover area with
mulch- Leave of ground visible.
3026

NMI
MIN NMI
NMIflLt I'ma�a8U1.,
RUNOFF FROM
HIGH pH SOIL
SEEPAGE
COMMERCIAL USE
LIME
STORAGE
LAGOON
SEEPAGE
WATER FOR
LIME REMOVAL
OPERATIONS
285,000 GAL/MO.
EXISTING SEEPAGE
NEUTRALIZATION
POND
/ 713,000
GAL/MO.
EG JD
LIQUID TRANSPORT PIPE
••-••••-- GAS TRANSPORT PIPE
(xxl BALL VALVE
SEEPAGE TREATMENT BASIN,
VOWME; 290,000 GALLONS
CO, DIFFUSERS
TRANSFER
PUMP
Q: 40 GPM
TON; 80 FT.
p©4
CARBONAT
FLOW MONITORING
CHANNEL
428,000 GAL./MO.
CO, BULK STORAGE TANK
No. OF UNITS; 1
CAPACITY: 0 TONS
DIMENSION: 8 FT. 0 x 12 FT. L
SEEPAGE TREATMENT SYSTEM
PROCESS FLOW DIAGRAM
NATIONAL WELDERS SUPPLY CO., INC.
CHARLOTTE. NORTH CAROLINA
x 'r, NOT TO SCALE 1' ' � E.C.F.
DEC. 1992 C.F.W., D.
E.E
N 5 02 BEN

DESIGN BASIS
ATTACH ENT
RY FOR SEEPAGE TREATMENT SYSTEM

DESIGN B Y FOR
SEEPAGE T
National Welders
AEI Job No. N159-02
Runoff/Seepage Volume: QT
Average Annual ... Rainfall = 45 inch
7.0 Acres
Total Drainage Area
Area of Lime Storage Lagoon = 2.0 Acres
Total Flow -(45 1n)(7 acres) ( (27,157 gal)
Yr 12 mo rein
712,071 71 gal/ m ; say 713, gal/md
Seepage Recycle/Removal:
Seepage recycled for lime removal operations i mated
285,000 gal/mo.
.
T eated seepage discharge td e eek: QD
OR 713,000 285, 000 = 428, 000 gal/mo (0.0143 Gib)
est'
Required seepage treatment basin volume: VT
Basin volume designed based on 10 yr 1 hr s o event;
2.4 n/hr
Minimum 30 min retention t
at peak flow conditin; T
in 11 5,000 gpm
Qc,ut (pump capacity) =40gPm
VT = T * (din 3 min 000 gm. gpm)
148,800 gallons
Proposed basin volume 290,000 gal
Design Detention Time (Treatment Time)DT
290,000 gal 53 5 min 1 hr 3mir
(in ut (5, 000 gpm
therefor OK

1drulac calculat n
2g
M = Zi Z2 + n
745
4
40 GPM, 'r
_ Q = 1.82 fps
2*32.2
.45 f00 ft
• 640 ft
Entrance lass 1 K= .fit'
Cutlet loss1 1.
90* elbow 1 approx.) K= .
Standard T K=1.08
Ball Valves *2 K=0.05
TOM Z, - 2h1
(745-694)
51+0.45 100 ft*640 ft
• 51. + 2.88 + 0.32
• 54.2 ft
Say TOM = 60 f
2g
Pump selection based on Q = 40 GPM, TOM = 60 ft
See attached pump specifications and pimp performance cu
ve

P.3/4
_CT O3
02:19Pri sPP-r: :
SPECIFICATION DATA
SECTION 55, PAGE 125
AUGUST 16, 1976
Self Priming centrifugal
CLOSE COUPLED ELECTRIC MOTOR DRIVEN
�
MODEL li1 /2 A2_ E 1 ,111 A3-E1 r2
Size i x 11/2-
PUMP SPECIFICATIONS
Size: 1% x 1'h, NPT, Female
Casing: Gray Iron 30
(Maximum Operating Pressure, 50 Lbs.i
Impeller: Open Type, 2 Vanes, Gray Iron 30
(Handles 1 in. Dia. Spherical Solids)
rouble rease Lubricated Seal with 5prirsc Loaded
Grease Cup. Bronze Stationary Seat. Rotating Faces
are Steel. Elastomer is Neoprene. Maximum Tempera-
ture of Liquid Pumped, 110°F. Seal Liner is Brass.
Model 111/2A3-E 1;
echanicai 5e f Lubricated Seal. Ceramsc Stationary
Seat Carbon Rotating Face. -Etastemer is Buna-N.
Maximum Temperature of Liquid Pumped, 160°F.
Shaft Sleeve: 5 et 1420 Con 111r4A2 E ti
Stainles Steel COn 11'Sr 3-El ,1 )
Cover Plate, Removable: -Gray on 30 _. .
Wear Plate, Renewable. Steel
Intermediate: Gray Iron 30
Flanges: Gray Iron 30
Gaskets: Cork & Buna
Vegetable Fiber (Mode.) 11V1A2•E 11/2 Only)
Standard Equipment: Strainer
Seal
MOTOR SPECIFICATIONS
Type: Totally Enclosed Fan Cooled
H P. 1Th
R.P.M. 3450
Cycle: 60
Voltage: Single Phase 115/230
Three Phase 230/460
=rarrse No.: 56
Motor Shaft: Stainless Steel 316
/a rezem reArA
WARNING
DO NOT USE IN
EXPLOSIVE ATMOSPHERES OR
FCR PUMPING FLAMMABLE PRODUCTS
ffe,17,07,M001'
THE GORMAN-RUPP COMPANY
MAN SFtELD, OHIO

CJP i OS
P.4/4
SPEC!
T
ON HATA
MODEL 1114A2-E114
NET WEIGHT: 106 LBS.
SHIPPING WEIGHT: 121 LBS.
EXPORT CRATE SIZE: 3.9 CU. FT.
MODEL 1114A3-E 11/2
NET WEIGHT: 1tia9 LBS.
SHIPPING WEIGHT: 115 LBS.
EXPORT CRATE SIZE: 3.9 CU. FT.
T- 7.2I-71-11EV.
THE G©RMAN-RUPP COMPANY • MANSFIELD, OHIO
GtRMANRLIPP GDRMM RUPP OF CAPVA
DA LIMITED r ST. THOMAS„ ©NTARPGI, CANADA
Cowl,' ©r rha ;w,, �-.s.0 s.

ATTACHMENT
TR ATABI STUDY REPORT

TREA''
AEILITY STUDY
NATIONAL
rE, NORTH C* `OLD A
Prepared for.
National Welding Supply, I
Charlotte, earth Carol na
Prepared by:
AWARE Environmental Inc.
9305 Monroe Road, Some
Charlotte, North Carolina 28270
AEI Job Na. N159-02
January 1993

TABLE OF CONTENTS
Description
Table of Contents
Appendices
List f Tables
List of Figures
Introduction
Methodology
Results and D scussion
Summary
APP DICES
Page N
Appendix Analytical atai Test Results and Associated
Calculation
Appendix B Design Criteria Calculati n

'HT OF T LES
Table No. Title
Summary Results
PH
Neutralization s t Study
ro
Calculated and Measured Sludge
Production
Design Criteria for H Centro.
System Using cot
LIST F FIGUR S
Page No.
4
10
Title PageNo
Test Apparatus
Results of COS Addi°tion: f
. Time
CO Transfer
02 Flow
ency vs.

INTRODUCTION
This report presents the results of the treatability study
performed in order to assist in the design of a pH control system
for the NPDES permitted lime pond seepage collection/treatment
basin. The basin is located at the National Welding Supply
Company, Inc., Old Dowd Road facility in Charlotte, North
Carolina (National Welders).
The study evaluated the use of carbon dioxide (CO2) for pH
control. Data collection and evaluation included CO2
requirements, CO2 transfer efficiency and calcium carbonate
sludge production at various rates of CO2 addition. Pilot
studies were performed at the National Welders facility on
September 2, 1992.
METHODOLOGY
The pilot tests were performed by bubbling CO2 gas at various
flow rates into a 92-liter container of high pH (approximately 12
s.u.) seepage. The test apparatus is presented in Figure 1. A
CO2 gas cylinder, pressure regulator and flowmeter were supplied
by National Welders. The CO2 gas was introduced using a coarse -
bubble diffuser constructed from 1-inch diameter, schedule 40 PVC
pipe. Water for the tests was obtained directly from the I me
storage pond at the site in order to simulate worst -case
conditions.

FIGURE T

A total of three (3) tests were performed at CO2 flow rates of 5,
15 and 30 cfh. During each test the test water was continuously
monitored for pH using a pH of 8.75 s.u. as the target pH value.
Samples were also collected for alkalinity, hardness and TSS
before CO2 addition. A TSS sample was collected immediately
after achieving the target pH (completion of CO2 addition) in
order to determine solids production. The test water was then
allowed to settle for one (1) hour before collecting
samples for alkalinity, hardness and TSS.
aJ
RESULTS AND DISCUSSION
The results of the three (3) CO2 addition tests are summarized in
Table 1. The analytical results of the tests are included in
Appendix A. For full-scale design purposes, gas flow rates used
in the study were normalized by converting from units of cubic
feet per hour (cfh) to units of standard cubic feet per hour per
gallon of water treated (scfh/gal). In all three (3) tests, the
neutralization reaction was complete in approximately 30 minutes
or less. The pH versus time relationship for each test is given
in Figure 2. In all three (3) of the tests the decrease in pH
was very slow initially until a pH of approximately 11 was
reached. During this initial time period, CO2 was reacting with
lime to form CaCO3 precipitate by the following reaction:
CO2 + Ca(©H)2 -» CaC031 + H2O

T
LE• I
Y OF RESULTS FROM pH
NEM
IZATION PILOT STUDY
Normalized Time to pH CO2
Gas Flow Gas Neutral- C°2 Transfer
Rate a
Flow Rate izationb Requirementa Efficiencya
Test (en') sell"' al min (1b/1000 gal) (t)
15 0.65 16 21 34
2 5 0.22 31.5 53
30 1.30 12 32 25
NOTES:
aCalculations presented in Appendix A.
bBased on as the time taken to reach a pH at 9.0 (see Figure 2).
4

ttf
10
mgal
20
RESULTS OF I
TM
c
FIG <2
ADDITION:
30
0 2et

After the precipitation reaction was complete the rate of pH
decrease increased dramatically.
As expected, the time period required to reduce the pH of the
seepage was dependent on the CO2 flow rate. The transfer
efficiency, in terms of equivalents of CO2 required per
equivalent of alkalinity reduced, was found to decrease with
increasing gas flow rate. This relationship is illustrated in
Figure 3 for the gas flow rates used in the study. A maximum
transfer efficiency of approximately 50% was obtained at a flow
rate of 5 cfh or 0.22 scfh/gal. Transfer efficiencies determined
in this study are conservative for design purposes. Since gas
transfer efficiency increases with increasing diffuser depth, it
is anticipated that transfer efficiencies at a given gas flow
rate will be greater at water depths greater than the 20 inch
depth in the test reactor. Transfer efficiency calculations are
presented in Appendix A.
Sludge production can be estimated based on the reduction in
hardness of the test water by assuming 1 mg/L of CaCO3
precipitate produced per 1 mg/L (as CaCO3) of hardness
precipitated. Sludge production was also determined
experimentally by measuring total suspended solids (TSS) before
and after CO2 addition. The results from both of these methods
are compared in Table 2. The measured solids production was
somewhat less than what was calculated based on the alkalinity or
6

FLOW
FIG
e
CO2 SF EFFICIENCY VSCO2

T LE 2
TED AND M * D E PRODUCTION
Calculated Sludge Productiona Measured Sludge Production
Test (mg/L) jijQQQa1 Ibidayb 1,bidave (mg/L) (1b/1000 gal) lb/dayb lbidayc
1 1796 15.0
2 2200 18.3 1207 10.0
2112 17.6 1480 12.3
Average 2036 17.0 243 8.5 1317 10.9 160 5.5
NOTES:
aCalculations are presented in Appendix B.
1263 10.5
Based on the monthly average permitted flow of 0.0143 MGD.
cBased on anticipated dry weather pond seepage rate of 0.0005 MGD.

hardness reduction. This discrepancy may be due to sampling or
analytical error. The calculated solids production (17.0 lb/1000
gal) is more conservative for use as a basis for full-scale
design. Sludge production calculations are presented in Appendix
B.
SUMMARY
Based on the results of the pilot testing, a CO pH control
system should enable adequate control of pH in the proposed
seepage collection/treatment basin. From data collected during
the pilot testing, the design criteria for the pH control system
have been developed and are presented in Table 3. System design
criteria calculations are presented in Appendix B.
The CO2 usage rate of 24.5 lb/1000 gallons of seepage was
estimated assuming a conservative. CO transfer efficiency of 30%
and an alkalinity reduction of 2000 mg/L. The average CO2 usage
(lb/day) was estimated based on the 24.5 lb/1000 gallon usage
rate and the permitted monthly average seepage/stormwater flow
rate of 14,300 gpd. A design CO flow rate of 52.4 scfm was
calculated based on the CO2 flow rate of 0.22 scfh/gal used in
Test No. 2 of the pilot study and a volume of 14,300 gallons (one
day's flow). At this flow rate the volume of water collected
over a one -day period can be neutralized in approximately 30
minutes assuming conditions similar to those in Test 2.
Since lime pond seepage will normally be treated on a continuous
9

TABLE 3
DESIGN CRIT i* I. FOR
CONTROL SYSTEM USING
FLOW
Design (MonthlyAverage) is r water
Flow
Anticipated Dry Weather Seepage Flow (gpd)
• ADDITION
• 2 Transfer EfEfficiency(%)
• 2 Usage Rate lb 1000 gal)
• 2 Usage @ Design Seepage Flow
Design COCO Flow Rate (scfm)
lb/d)
CRIT IA
14,300
500
30
24.5
350
52.4
DIFFUSERS
Type of Diffuser Coarse Bubble
Total Length of Diffuses 16
N . of Diffusers 2
No. of Orifices 32
Orifice Spacing (in.)
Orifice Diameter (in,0.25
SLRE PRODUCTION
Sludge Production (lb/1000 gal of seepage) 17.0
Sludge Production at Design Seepage Flow (lb/d) 243
sludge Production at Anticipated Dry Weather
Seepage Flow (ld

basis, it is anticipated that actual CO
than the design flow rate of 52.4 scfm.
rates will be lower
CaCO3 sludge production was estimated at 240 lb/day at the
permitted monthly average seepage flow rate of 14,300 gpd and 8.5
lb/day at the anticipated dry weather flow of 500 gpd by assuming
1 lb of CaCo3 sludge produced per lb (as CaCo3) of hardness
removed.
TREATMENT SYSTEM DESIGN CONSIDERATIONS
The primary functions of the proposed treatment system will be to
collect high pH seepage and stormwater associated with the lime
storage basin, provide a reservoir for water to be used in the
lime recovery operation, and provide pH neutralization and solids
separation for the collected water prior to intermittent manually
controlled discharges to the tributary of Taggart Creek.
Discharges to the tributary may occur when the lime recovery
system is out of service for a prolonged period. Normally the
collected seepage and stormwater will be used in lime recovery
operations and the water level in the treatment basin will be
minimized.
The current effluent limitations in the National Welders NPDES
permit (NC0079758) include flow (0.0143 MGD monthly average),
total suspended solids (30 mg/L monthly average and 45 mg/L daily
maximum), and pH (6.0 s.u. - 9.0 s.u.). Based on the results of
11

the re . li y study, permit compliance for pH and
predicted;. Test results indicate effluent pH values should range,
from 7.5 s.u. to 7 8 s.u. and TSS concentrations from 1 mg/L to
18 m
12714
12

RESULTS OF CO2 NEUTRALIZATION STUDIE
NATIONAL WELDERS
PRO, . # N 1 E -S2
TESTS PERFORMED 9/2/92
RHH
FILES 2.w l
DEPTH TO DIFFUSER
DIFFUSER ORIFICE SIZE
N, ORIFICES
DISTANCE SET. ORIFICES
VOL. OF REACTOR
TEST 1
CO2 F
TIME 1n) pH
0
2
3
7
8.5
10
12
16.67
17
FINAL
SETT. 1 hr
OW
12
12
12
12
9
8
75
7.5
7.S
20 in
0 25 in
4
3 in
92 L
15 h =0.647 sc gal
S MM.S 2
ADDED
(1h/1000 ALK TH
gal) 1) e,1 )
TSS
S LU SOLU.
ALK HARD
mg/11 1)
0.0 2076 2000 70 2076 1736
1.3
2.
4.0
6
2
,2
®2
5
21
22.0
22M
16
204
CO2 REQUIREMENT 02fc1 A)
CO2 TRANSFER EFFICIENCY (eq ALK/e CO
HARDNESS REDUCTION (mg/L)
SOLIDS PRODUCTION t/L)
00%
3.9
2.
1796
1263

RESULTS DF CO2 NEUTRALIZATIONSTUDIES
NATIONAL WELDERS
PR0J . # N 1 9-02
TESTS PERFORMED 97'2/92
RHH
FILE.O02 wkl
DEPTH TO DIFFUSER
DIFFUSER ORIFICE SIZE
N. ORIFICES
DISTANCE BET. ORIFIOE
VOL. OF REACTOR
TEST 2
FINAL
SETT. 1 hh 7.6
10
15
20
25
27.5
28
29
30
0.E
31
.25
.5
.75
32
CO2FLOW
51"`h
CUMM.0O2
ADDED
(1/100U
gal)
20 in
0 25 n
4
3 in
92 L
U . 216 fhi9I
SOLU. . OLU
TH TSS L HARD.
mg/1) (q1 (mg/1)
0.0 2024 23 91 74 1903 2304
.7 ,9
.6 1.8
.6 2.6
.4 4.0
.4 .
4
.4 4.8
3 .7
.4
2
10.8
10.3
9.8
9.4
9.2
8.9
8.75
8.4
8.2
1.2
.'.
87
12.9
14.0
14.1
0
1281
CO2 REQUIREMENT (e CO2/eq ALK) 1 a 90
CO2 TRANSFER EFFICIENCY ( q L / q 002 10U ) 2.7
HARDNESS ES REDUCTION (mg/L) 2200
SOLIDS PRODUCTION (mg/L) 12C17

RESULTS F CO2 NEUTRALIZATION STUDIES
NATIONAL WELDERS
PROJ. # N1 2
TESTS PERFORMED 2/2
RHH
FILE:CO2..w 1
TEST
0
3
4
5
6
7
8
9
10
11
25
11.5
75
12
12.17
12.33
12.5
FINAL
SETT. 1 hr
DEPTH TO DIFFUSER 20 in
DIFFUSER ORIFICE SIZE 0.25 in
N. ORIFICES
DISTANCE BET. ORIFICES 3 in
VOL. OF REACTOR 92 L
CO2 FLOW
12
12
.4
.4
.4
10,8
10.6
10.4
10.2
6
8.
8.4
6
8
20 h 1.295 hf.1
CUMM , CO2
ADDED SOLU. SOL
(lb/1000 ALK TH TSS ALK HARD.
gal) (/1 91+ /1
0.0 2268 2212 149
2.6
5.3
7.9
1.
3.2
15.9
18.5
21.1
23.8
26.4
29.1
29.7
30.4
31.0
1.7
32.1
2.6
.0
1629
CO2 REQUIREMENT (eq O02/ q ALK) . 7
O2 TRANSFER EFFICIENCY (en LK, q CO 1 25.2
HARDNESS REDUCTION to /L 2112
SOLIDS PRODUCTION (mg/L) 1480

s tiot

9

FQr-
loom
z T,rq v+ S -Pe +r
4 S
Al

A .4-

OR EQU RM TLIST
National Welders
Seepage Treatment Basin
ajor ui m n
Phi Measure
Units
Se
NCH a. 80 PVC Pipe
Rubber Hose including
NPT male each end
LF
LF
priming Centrifugal pump EA
t ',DH
Pump Housing EA
Hall Valves "° PVC EA
Concrete CY
81 CMP LF
Diffuser and Diffuser Support EA
In -Line Carbonator R.
COa Bulk ° ora Tank, ton EA
1
545
240
30

EFFLUENT
NPDES PERMIT NO.NLcCr7, 7, 8 DISCI IA RGE NO. COI MONTH YEAR 2-00
FACILITY NAME A. t• CI„,A SS C' MecKteN)
(TRU FI I„,ABORA R RY 61s-ta (cm 0,1vi CFR.'111 IC,ATioN NO,
dist additional laboratories on the backside/page ol tl"7 form
oprRA FOR IN RESPONSIBLE LARGE ORO
PERSON(S) C01,1,EC HNC; SAM PI .ES
CHECK BOX IF ORC IIAS CHANGED
Mail irfiR !GEN AL and ONE: COPY 10:
A TIEN'. CENTRAL FILES
DIVISION OT WATER QUALITY
1617 MAIL SERVICE CENTER
RALEIGH, NC 23699-1617
OHO
'US
io
e,otre
0
IQ
A VERAE;
MAXI:MUNI. .:
NIENEM
"orap, Grab
Ntuallinv
416161"ec Ron
EWE
GRADE. CHO IFICATION
OR( PI IONE 70,9-- 1'0{- .3
NO FLOW I DISCI IMAGE: FR srIT
• 3.N., IF RE OF OPER.A"TOR 1 R„ESPONSII3LE CHARGE)
. 'rims 967sArtlit, CERTIFY THAT EMS REPORT 15
.M7C1 Kit AND COMPLI-TE TO THE REST OT S1 KNOW IXEIE
MG/1
111160,0
EN'IER :PAR'.copc miovc
NA.ME AND UN its .11ILLOW
DWQ 1orm MR-1 (11/04)

Facility Status: (Please check one of the following)
II monitoring data and sampling frequencies meet permit reqtrennts
(including weekly averages, if applicable)
-Wring data and sa.mpling frequencies do NOT meet permitpermt rcquuerneins
pliant
Noncomploa
The perinittee shall report to the Director or the appropriate Regional Office any noncompliance that potentially'
threatens pu.blic health or the CrIVironment Any information shall be provided orally within 24 hours .from the time the
permittee became aware of the circumstances. A written sub -mission shall also be provided -within 5 days of the time the
permittee becomes aware of the circumstances.
IT the facility is noncompliant.. please attach a list of corrective actions being taken and a time -table for
improvements to be made as required by Part II.E.6 of the NPDES permit.
"1 cert • under penalty of law, that this document and all attachments were prepared under my direction or supervision
in accordance ,ivith a system designed to assure that qualified. personnel properly gather and evaluate the information
su.bmitted, Based on .my inquiry of the person or persons Who managed the system, or those persons directly responsible
for gathering the information, the infomation submitted is, to the best of. ony knowledge and belief, true, accurate, and
complete. I am aware that there are significant penalties..for „submitting false inforination, including the possibillity of
tines and imprisonment for knowing, violations."
Perm itte
Address
Certified Laboratory (.2)
Certified Laboratory (3)
Certified Laborator! (4)
( erti ed Laboratory (5 )
(Required, unless submitted electronically)
7tY &of la,41 Yfi 0- rar
l'hoiw Number c-mrtoi a d re
AIDDITIONAL CERTIFIED EA.BORATORIES
PARAMETER CODES
Permit NxpirW'fon Date
Certification No.
Certification No.
Certification No.
rti fi cation No ,.
Parameter Code assistance may be obtained by calling the NPDES Llint at [phone] or by visiting the Surface
Water Protection Section's web site at h2o,ennstate.nc.usiwcos and linking to the unirs ittfOrmation pages„
Use on I.;
1. se ncnt des enatet n cportiig ;lac ty's N e data,
No FlowiDischarge Frown Site: Cheek this box if no discharge occurs and, as a result, there are no data to be
entered kyr all of the paramers on the 1)111R for he en.tire monitoring period,
OR( On Site?: ()RC must visit facility and document visitation of facility as required per 15A NCAC 8G „0204.
*** Signature of Perntittee: esigned by 0hLr han the permittee,, then the delegal ion or the signatory authority must be on
file with the state per 15A NC.A.0 2B .0506(b)(2)(D).
Page 2

y
1:
C t)bNR
AT r NTI 1 : " .ntr
117 Mail Service Ceti
Raleigh), NC 699-1 a17
charge Monitor t itcar ia7 Report
it1rs Supplyt Co.. Inc
lnrth Carolina.
NI oi NC 79758
a ani
burg t'taunty
2010
ftf o • f inc1 brat. 1 c ri l and. o.
inclieat n vast rat r that har c -;
the month csf 1 axe 7if)1
u tnit. bon&t t ti r gtrir00
° t1 1 atictnal. We1tlera
,clyestionsb.ot° tft n°tt°taent . pleas
a nrit°carrnaenttal "ntt: talttan, 1n.xi
,0t p ratio rt with. thi rntatter..
Sint: r
discharge in
na National Welders
Penni
operation and titan)
contact our Lttyri
No. ,,NC0079,762
tt tnt c. ttlant 11` ,
report
and as
to "have
nab nttii .ttn ttltant,.
volt in ad1=caaacte for
tnl i lain Manager

NPDES PERMIT NO.
FACILITY NAME.
C.:ER:1'1E1u) LATIORAT .
EFFLUENT
DISCHARGE NO.
(list additional labi:watories on the backsidepage 01 s form)
OPERATOR IN RESPONSIBLE CHARGE(OR C) • tAlke GR„ADE 7ERTIFICATION N(,),
PERSON(S) COLLECTING SAMPLES 4cL4L''rptAa- ORC PHONE
CHECK BOX IF MC HAS CHANGED NO FLOW I 1111 FROM SITE '
MONTH
CLASS CO ....INF('
cERA C.A"VION NO,
YER20 0
tul OR [(ANAL and ONE COPY to:
ATTN: CENTRAL FILES
DE W KITH QI LITY
ILO 7 MAIL SERVICE CENTER
:RALEIGH, NC ,7,7699-1617
IRS I HS
9414 10
20 00 /0
21 0
;amp,. (() 1 Grab (G)
MonAly Utak
50050 ' 000(0
FLOW
EFF
INT-11 Ti
mG.D €
disiinfmtion
UNITS RICA,
(SKiNA'ruRF OF OPERA T( IR IN RESPONSIBLE CHARGE)
DV THIS SIGNATURE, I CERTIFY "THAT EMS REPORT IS
ACCURATE AND COMPLETE TOME REST OF MY KNOWLEDGE.
00310 00610 00530
3106 00301
0(16440 94)645
ENTER PA RA NIETCR CoM ABOVE
NAME AND UNITS BELOW
DWQ 1orm MR- I 0

Facility Status: (Please cheek one of the following)
All .monituring data and sampling frequencies meet permit requirements
(including weekly averages, if applicable)
A.II monitoring data and amphngsampling frequencies do NOT meet permit requirements
The permittee shall report to the Director or the appropriate Regional Office any noncompliance that potentially
threatens public health or the environment. Any information shall he provided orally within 24 hours from the time the
permtttee became aware or the circumstances, A written submission shall also be provided within ,5 days of the time the
permitice becomes aware of the circumstances.,
If the .facility is noncompliant, please Bach a list of corrective actions being taken and a time -table for
improvements to he made as required by Part JLF.6 of the \PI)FS permit,
"I certify, under penalty of law, that this document and all attar intents were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who Managed the system, or those persons directly responsible
for gathering the information, the information submitted is, to the best of my knowledge and belief,' true, accurate, and
complete, I am aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations:"
rock,N, 4\-,-,
Permitter (Please print or type
Signature of .Permitteel** Date
(Required unless submitted electronically)
6',-17 3 ea ,02x44CIad41 it )--14i -104--(gW3* raivIal&ki a,'
Perm race Address
Phone Number e-mail address
Perm t IF.xpirLtu(3u Dale
Cenified_aboratory (2)
Certified Laboratory(3)
Certified Laboratory (4)
Certified 1..„aboratory (5)
ADDITION„A ERTIFIED LABORATORIES
PARAMETER CODES
(1ertitication No,
Certification No.
Certification No.
Certification No,
Parameter Code assistance may be obtained by calling the NPEfl Unit at [phone] or by .visiting the Surface
Water Protection Section's web site at h2o,enr.state,nc,uslwqs and linking to the unit's information pages.
Use only units of trewsuremern designated in the reptir 'NpDr.s pert
Ittin data,
Nu Flow/Discharge Vrow Site: Check this box if no discharge occurs illtd, ati a result, there are no data to 'be
entered for all of the parameters on the 1.f MR, for the entire If nonitoring period,
()RC On Site?: ORC must visit facility and document visitation of :Preility as required peir 15A NCAC ,0204,
*** Signature of Permittee: If signed by other rlian the perminee. 0101 the delegation of the signatory authority must be on
file with the state per I 5,A NCAC 2B .0.506(b)(2)(D).
Page 2

April
I Cal \ail cr =iccc
Raleigh„ NC 2'7`0994t 17
RE: V a to ater Discharge
rnal Welders Supply (ci
tte; l forth Carolina, 1=vlcc lcnhurg County
NPDES .c. w pp775
Dea ir/7stadam:
1 I iridica
during tl e ii crntli orApril
Report 11 r 3ilpril
inal aid i fC (1)
pater discharge did not cc:ciirfrcii
charge monitoring report
elder uppl >:
1)MR scihrnittal i ccinducted as re uid by NI 1)ES n i No. NCOIl7 75 rind a
r 'red by rational ;elders ista to ateiR operation and rrraintenanc:e plan. If :on have
any question's or corn t„. please fed Ire to contact crcir nvirotinicntal consultant,
a ErtV Trout-nental 'cii ultants, Inc., at (704) 541-9 Iliank you i advance for
operation piit.h this matter.
Sincere
nager

NPDES PEWIT NO.
FACILITY NAME
CERTIFIED E,A BORA'. ORY (1
(list additional laboratories on the backsketpage 2 of U4 kw
OPERATI;TIR IN RESPONSIBLE CHARGE 1()R2,,
IIERSONIS) (FOLLECTING SAMPI,f:,S
CifECK BOX IF OR( II.AS CHA\(FD
(„)RIOINAI. :itnd ONE COPY to:
ATIN CENTRAL FILES
Driasmis; OF WATER OPACITY
17. MAE-SERVICE CENTER
RALFBAI, NC 27699-1617
50050 00010
'EFT J—
IM'
UNITS
AVERAGE,
14,41(INIVNI
NUNINIUN
Gongs : /Gra' 0,
forahly Limit,
EFFILI„jENT
DISCHARGE NO, 06 MONTH
CLASS COUNTY
CERTIFICATioN NO.
YEAR 20/0
^),61ta
GRADE_ CrialfICATION
ORC PHONE 70
NO FLOW / S E
GN A' P - „A'tR N RlSP0IUI„E CHA.
Ell"1"11,1S SIGNATURE., I CFR:MT TONT THIS REPORT IS
ACC:GRATE A NO COM pLur E fO TOE ES'IOE MN FUNOWLEDGE„
.50060 . 00.31(1 0061.0 00530 •
I '
' NAIL MG11.
)ATE
LNIVR PARANWITLI COM; ADOVE
N A M ,AND UNITS BELOW
[AV() 1orrn 1vlR-1 (117441

Facility Status: (Please check one of the following)
All monitoring data and sampling frequencies meet permit requireme
(including weekly averages, if applicable)
A1 mon normg data and sampling frequencies do Nt,..)T meet permit' requirements
The permittee shall report to the Director or the appropriate 'Regional Office any noncompliance that potentially
threatens public health or the environment, Any information shall be provided orally within 24 hours from the time the
permittee became aware of the circumstances. A written submission shall also be provided within 5 days of the time the
perm ittee becomes aware of the circumstances,
If the facility is noncompliant, please attach a list of corrective actions being taken and a titne-table for
improvements to be made as requiredby Part 11.E.6 of the PDES permit
"1 eertitY, under penalty of law, that this document and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted,. Based on niy. inquiry of the person or persons ‘vho managed the system, or those persons directly responsible
for gathering th.e information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
conipletc 1 am aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for kintwing violations:
5,10.444,41
PermOnee Address
Numbs
tee (Please print o
Signature o ermittee*"
'pe)
Date
3
(Required unless, submitted electronically)
///1ij (?).-,
e-rnail address r omit EKpiratIon Dare
Certified Laboratory- (2)
Certified L.,aboratory (3.)
Certified Laboratory (4)
Certified Laboratory LS)
ADDITIONAL CERTIFIE, LABORATORIES
PARAMETER CODES
Certification No.
Certi fication No,
Certification No,.
Certification No,
Parameter Code assistance may be obtained by calling the PDES Unit at (919) '733-508.3 or by visiting the Surface
Water Protection Section's .web she at h2o,.enrstate.nc,ustkvqs and linking to the units information pages,
Use only units ot s 1SUi& 111010 designated in the reporting facility's \ P1» perrnit for retxining data„
k No Flow/Discharge From Site: Cheek this box if rio discharge occurs and, as a result, there are no data to he
entered iOr al P of the parameters on the DIVI.R for the entire monitoring period„
" °RC On Site?: Okk.: must visit facility and document 'visitation of taLIht is required per I5,A NCA(7 ,0204„
Signature of Permittee: Irsigned by other than the permitlee. then the delegation of the signatory authority must be on
file with the state per 15A NCAC 2B ,0506(b)(2)(D),
Page 2

ar
NC 14ENR
lalctl, C ' 7fa - 117
. 'aa t rater I l cli r c r nitrat pp lit
latitataaal ldr Halal C'ca.. Inc.
C'l afl ttc, ortla C tta
1 1
carSir', ladaan.,
E clta cd -id on
(DN1R Indic
during the rxit nttt
rg Cottt�t
and cpfa(tlr ortituring report
diachar did der; Supply
1 l
4 r'114. 0Thrtutal i cctcltrctccl rr rctltrirt d by 'li 1'. ait No. . C ( 079758
1
required by €aaticataal 'cic-fur it t :water aIteration ce plan.
any questions ter conata e please feel lircc tag ccaaatact ctrrr a°irut rrt ttl
Delta Environmental Cons) t , ltac;, aat (70} 541 d. T1tt an : you in advance
your cooperation with tl ls matter,
intacrt°1\
'land
liar al llaarat %atrt
tartar

NP1)1 PERMYF
FACILITy NAME
CER-ITFWD EABORA ,RY111)
(lisi additional lalwatories on the backsideipage 2 fonn)
OPERATOR IN RE 'I'( CI IAR6F, (OR(;) TJAPii
PERSON(S) COLLECTiNG SA „LS_
(It( K ROX IF ORC LEAS CU:AN(EL)
Mail C./R. RANA] and ONE COPY to:
VEEN: CENTRAL FILES
DIVISION OEWATER QUALITY
1617 MA II., SERVICE GEN-VTR
RALEIGH, NC 27699-107
50050 00010
FLOW
UNITS
AVERAGE
MA X11441111141
WNW1
C (.- G
1trinthly Limit
59060
EFFLUENT
DISCIIARGF NO, CO M( NTH 6ra A
rt
1N`FY
CITallICA MNNO:
GR,ADE. ( CER'FIFICATION NO,
ORC PlIONE
NO FLOW /1111SCEIA;RGE Hu N9 SITE * c5C1
GNATIIIRE OE 1)PERNE0' IN RESPONSIBLE 41!:ARGE)
RV THIS SIGN,ATT RE, I CERTIFY .THA1/11 TIROS RETOIET IS
A (-CURATE A N1ll COMPLETE 160 'IMF, BEST OFMA ,SOWI
(10530
0106t,5
)ATE
ENTER PARAMETER COHE A ROVE •
NAME AND UNITS BELOW
z
1DWO Ei4rn NIR 1 /144

Facility Status: (Please check one of the following)
All monitoring data. and sampling frequencies meet permit requirements
(including weekly averages, if applicable)
All monitoring data and sampling 'frequencies do 'NOT meet permit: requirements .. __. ...,_.
NOUCUMpliant
The, permittee shall report to the Director or the appropriate Regional Office any tioneomplianee that potentially
threatens public health or the environment :Any information shall be provided orally within 24 hours from the time the
perminee became aware of the circumstances, A written submission shall ids° be provided within 5 days of the thine the
permittee becomes aware of the circumstances.
If the facility is noncompliant, please attach i lisi of corrective actions being taken and a time -table for
improvements to be made as required by Part ILE.6 of the WOES permit.
"I certify, under penalty of law, that this document and all auttehments were prepared under nr direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
.submitted, Based on my inquiry of the person or persons 'who managed the system, or those persons directly responsible
for gathering the information, the in fomiation submitted is, to the best of My knowledge and belief, true, accurate, and
complete. 1 am aware that there are signifieam penalties for submitting false information. including the possibility of
lines and imprisonment for knowing violations, -
Paw rrett Address
ee (Please print• type)
Signature of Permittee*" Date
(Required unless submitted electronically)
441i 3247 A' 15( (et (dp' 2Q'
Plwrre Nurntbr.,:r c-111,311;,:tcires's Pestrli 1 1)eae
Certified .Laboratory 2)
Certified L.,a.boratory (3)
1.7ertitied„1..„aboratory (4)
Certified Laboratory (5)
ONA 7ERTI ORATORIES
PAR.AMETER CODES
Certification No,
Certification No,
Certification No,
Certification No,
Parameter Code assista • ce rnay be obtained by calling the NPDES Unit at [phone] or by visiting the Surface
Water Protection Section's web site at h2o.enLsta.tenc,usewqs and linking to the unit" s information pages,
Use only units of IleilStirtniTleIll. designated in the re ring laLl1riv's NPDES permit for reporting data.
" No Flow/Discharge From Site:: Check. this box tin° discharge occurs tunit as a result_ there are no data to he
entered for all of the parameters on the DMR for the entire twoninning period.
OR( On Site?: ()RC must visit facility and document visitahon or facility as required per I 5A 'NC,AC 36 ,0204.
"* Signature of Permittec: If signed hy other than the permittee, then the delegation fit/ the signatory authority must he on
file with the state per I 5A NC AC 213 .0.506(b)(2y
Page 2

1*ebru ry
NC 1R 1 1 °1 1cncif
MOON: Central 1'
1617 Mail Service Center
Raleigh, NC 27 c)-1Ca1'1
Baal
RE: Wa ter T arge N4c r it r1g Report l r February
Nat viders Supply Co., lrrc;
Char ttc, North Carolina. MecklenburgC c tatty
NPD S No. l C 007 75
Dear
Tarr
Enclosed lr s c pleas lira one 1 l curl lnal and one (l
indicating a wastewatr r discharge d1
c rrrl r the month of February ruary " (J 10.
1)IV1C submit t l 1 rrndu to as reclrzlt cl
by N
inquired y °ratio I Welders a. ga t watcr operrr
rrr ), lr�c harts or continents. please feel free to
Delta Environmental Consultants, , 17 :)11)
your cooperation ,°it thisrrr rttcr`.
osures
copy o1' the discharge in report
r t
ccrrr from National Weld:r Surly
f 1S Perm1t o, NC0079
nd rrtaintcranee plan, if
environment_car
41-9890. l`lank you in advance f

NPL)F.' E)E.R€MITNO,
FACII 1 FY NAME
CERTIFIED L) 1.,r1E)OR 1 I'ORY
(list additional liltr()ratories on the I <Ickside,'pa
OPERATOR IN RESPONSIBLE CHARGE (
PERSON(S) CU1 LE.0 I ING SAMPLES_
(;HECK BOX IF (O((" Ei tS CHANGED
4fi 111 ORfi1NAL and ONE 11 )PY to:
rTN: cFNTRAI. FILES
DIVISION OF WATER OI:Alin'
1617 t--1,.II., SERVICE CENTER
14 ALE I1:FI, `It: 27699-H 17
AVE:RAGI.
h(�?CICIit'A:I
EFFLUENT
DISC:FEARGE NO, I t)N-FFI ��?uA+R
tieri CLASS I C:'C)C!NrY__
( LR'1 IFIC'A'FIO,N NO.
RV T
+'' (RAF)1 C:.1 R`IEFICATT- NC),//24/7--
C)RC .NO
FLOW('4ff�{' 2q '
DISCHARGE FROM SITE":, *—
Pr:1t.A 1°t llt TN RE SPONSIBLI CHARGE)
SRF)'t1,RTis
cCER,aTF ANL) C('1M181I F:"rF TO TuT, REST' OF %1!` ktiOwLEDGE.s,
9

Facility Status: (Please check one of the following)
All monitoringdata and sampling frequencies meet permit requirements
(including weekly averages, if applicable)
All mon toring data and sampling frequencies do NOT meet permit requirements
The permittee shall report. to the Director or the appropriate Regional Office any noncompliance that potentially
threatens public health or the environment. .Any information shall be provided orally within 24 hours from the time the
permittee became aware of the circumstances. A written submission shall also he provided within 5 days of the time the
permittee becomes aware of the circumstances,
If the .facility is noncompliant, please attach a list of corrective actions being taken and a time -table for
improvements to be made as required by Part IIE.6 of the -NPDES permit.
"l certify, 'under penalty of law, that this document and all attachments were prepared under my direction or supers ision.
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the infimnation
submitted. Based on my inquiryof the person or ,persons who managed the system, or those persons directly. responsible
for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete. I am aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations."
53/3 Wiwi titi
Pernortee Address
Signature cif . Date
(Required unless submitted electronically)
70fo41m fe,441.01;11.e
Phone 'Nurnbcr e-rnaii address
Permit Expiration
Certified Laboratory (2)
Certified Laboratory 13)
Certified Laboratory (4)
Certified Laboratory (5)
:.T ONAL CERTIFIEDt) LAI3ORATORIFS
PARAMETER CODES
Certification No,
Certification No,
Certification No,
Certification No,
Parameter Code assistance may be obtained by calling the NPDES Unit at (919) 73'3-5083 or by visiting the Surface
Water Protection Section's web site at h2o.enr.state.nc.usfwqs and linking to the unit's information pages,
Use only units of measurement designated in the reporting tlici ity's NIMES permit for reporting data,
* Flow/Discharge Frani Site: Cheek this box if no discharge OCCUTS and, as a result, there are no data to he
entered tbr all of the parameters on the MIR for he entire monitoring period,
** OR(' On Site?: ()RC must visit facility and document, visitation of facility as required per 15A NCAC 8G .0204.,
*** Signature of 'Perim ittee: If signed by other than the permittee, then the, delegation of the signatory authority must, he on
file with the state per 15A NCAC 2B .0506(b)(2)(DY
Page 2

2010
NC DL,NR P
ATTENTION: Central
l 17 MailService'Cent r
Raleigh, ll„ l C 7699-1617
RE: Was at r I)ischargi c l 'lClCiltd)r ing Reiadadt
Nation atl Welders Co.. Illc_;
Charlotte, North Carolina. Meeklenbur County
NPDES No, NC0079758
I)ca r Siti laillalr-
ed plea
indlicatin a waste
d urirl ; th t11lt
d one
cliclar,c I
010.
DMR sit l ticsttal i conducted as rcc um,
required cl key Nat '!' 1eldl r
any questions car con-trl' cnt
Delta Frei in n111ettal C r siilta a 6rrc.
your cooperation ratio l this matter.
adlnar
by *Il1)I
operation and. rll
free to cc rttalc d?u
(7041 54179890.
2010
hc. dli
ar c I1 0ilit( r1 t1 report
National Wc
Supply�ry
NC( `( 79758 and as
gance plan;, It ydu have
crl\i1 d mental cons
Thank you in aldvane
Region Plant Matt
line ldic