NCG500604_Regional Office Historical File Pre 2018 (2)

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
July 26, 2002
JIM MERRIAM
BOC GROUP INC.
3537 FIELDSTONE TRACE
MIDLAND, NC 28107
Alit ffyiAl
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Reissue - NPDES Wastewater Discharge Permit
BOC Gases - Midland
COC Number NCG500604
Cabarrus County
Dear Permittee:
Your facility was recently granted coverage under wastewater discharge general permit NCG500000. This letter
serves as your notification that the Division of Water Quality (DWQ) has reissued the general permit and that your
facility's coverage will continue under the conditions of the reissued general permit. Please review the new permit
and technical bulletin to familiarize yourself with the changes in the reissued permit. In addition, DWQ is
forwarding herewith a reissued wastewater discharge general permit Certificate of Coverage (COC) for your
treatment facility. This COC is reissued pursuant to the requirements of North Carolina General Statute 143-215.1
and the Memorandum of Agreement between the state of North Carolina and the U.S. Environmental Protection
Agency, dated May 9, 1994 (or as subsquently amended).
The following information is included with your permit package:
* A copy of the Certificate of Coverage for your treatment facility
* A copy of General Wastewater Discharge Permit NCG500000
* A copy of a Technical Bulletin for General Wastewater Discharge Permit NCG500000
Your coverage under this general permit is not transferable except after notice to DWQ. The Division may require
modification or revocation and reissuance of the Certificate of Coverage. This permit does not affect the legal
requirements to obtain other permits which may be required by DENR or relieve the permittee from responsibility
for compliance with any other applicable federal, state, or local law rule, standard, ordinance, order, judgment, or
decree.
If you have any questions regarding this permit package please contact Aisha Lau of the Central Office Stormwater
and General Permits Unit at [phone], ext. 578
Sincerely,
for Alan W. Klimek, P.E.
cc: Central Files
Stormwater & General Permits Unit Files
Mooresville Regional Office
•I;fi�r •:
JUL 3fl2
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

State of North Carolina
Department of Environment
. I 4,
, f 2
and Natural Resources
— — —
Division of Water Quality
NCD
Michael F. Easley, Governor
``
k;;`..R`'?`.')URCEs '
William G. Ross Jr., Secretary
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NORTH CAROLINA DEPARTMENT-OP'"'^ii•`YLURCE
Gregory J. Thorpe, Acting Director
ENVIRONMENT AND NATURAL RESOUFZCS;`, "
February 1, 2002
Mr. Jim Merriam
FEB 1 3 2002
BOC Group Inc.
100 Mountain Avenue
Murray Hill, NJ 07974
Subject: General Permit No. N�G5000Q0e
BOC Gases- Midland, NC
COC NCG500604
Cabarrus County
Dear Mr. Merriam:
In accordance with your application for a discharge permit received on September 19,
2001 we are forwarding herewith the subject certificate of coverage to discharge under the
subject state — NPDES general permit. This permit is issued pursuant to the requirements of
North Carolina General Statute 143-215 .1 and the Memorandum of Agreement between North
Carolina and. the US Environmental Protection agency dated May 9, 1994 (or as subsequently
amended).
The additional requirements detailed in Todd Christenson's November 13, 2001 memo,
which is attached, must also be followed. If any parts, measurement frequencies or sampling
requirements contained in this permit are unacceptable to you, you have the right to request an
individual permit by submitting an individual permit application. Unless such demand is made,
this certificate of coverage shall be final and binding.
Please take notice that this certificate of .coverage is not transferable except after notice to
the Division of Water Quality.. The Division of Water Quality may require modification or
revocation and reissuance of the certificate of coverage.
This permit .does not affect the legal requirements to obtain other permits which may be
required by the Division of Water Quality or permits required by the. Division of Land'..
Resources, Coastal Area Management Act or any other Federal or Local governmental permit
that maybe required.
If you have any questions concerning this permit, please contact Aisha Lau at telephone
number [phone]-ext. 578.'
cc: 1Vlo6resville-Regional Office
Central Files
Stormwater and General Permits Unit Files
1617 Mail Service Center, Raleigh, NC 27699-1617
An Equal Opportunity Affirmative Action Employer
Sincerely,
GregQ—Y orpe, Ph.D.
Telephone [phone] FAX [phone]
50% recycled/ 10% post -consumer paper

DIVISION OF WATER QUALITY
November 13, 2001
MEMORANDUM
To: Aisha Lau — Stormwater Unit
Through: Matt Matthews
From: Todd Christenson
Subject: BOC Gases — Midland
Biocide/Chemical Treatment Use
NPDES No. NCG500604 (New applicant)
Cabarrus County
BOC Gases has requested that the biocide Spectrus OX1200 be approved for use at the above
facility. Data submitted by the facility and chemical supplier concerning dosage rates, degradation,
system volume, average daily discharge, toxicity of the active ingredient(s) and/or breakdown products,
and minimum stream flow have been reviewed and evaluated
Calculations summarized on the accompanying worksheets predict that the use of this product at the
stated dosage rates would result in a toxic.impact to aquatic life in the receiving stream. However, a
treatment methodology has been proposed by the facility which would allow the use of this product.
Therefore, the use of this product is deemed acceptable for use at BOC Gases — Midland with the
following conditions:
• The effluent waters are to be detoxified with a reducing agent (e.g. Spectrus DT1404).
The effluent is to be measured;in:the. detention pool prior to discharge for Total Residual
Chlorine (TRC) by an approved method:'All active halogens will be detected as chlorine.
Once the permit has been approved,the facility will provide data from five consecutive tests for
total residual chlorine (1 test per day for 5 days) which demonstrate that TRC is being reduced to
non -detectable levels (i.e. 0.00) prior to discharge. This will indicate the absence of biocidal
activity in the effluent. This data should be faxed to Todd Christenson, Aquatic Toxicology Unit
at 919-133-9959 once the tests are completed.
If there are questions concerning this review please contact me at [phone].
Attachments
cc: Central files
Jim Merriam, BOC Gases

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG500000
CERTIFICATE OF COVERAGE No. NCG500604
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN,
CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT -DISCHARGE ELIMINATION SYSTEM
In compliance with the provision* of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
BOC Gases
is hereby authorized to discharge non -contact cooling water, condensate, -and similar wastewaters from a facility
located at
BOC Gases - Midland
3537 Fieldstone Trace
Midland
Cabarrus County
to receiving waters designated as an unnamed tributary to Muddy Creek, a class C stream in the Yadkin River Basin
in accordance with the effluent limitations, monitoring requirements, and other. conditions set forth in Parts I, II, III
and IV hereof.
This certificate of coverage shall become effective February 1, 2002.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day February 1, 2002.
VY1.l.9t11��.Y�1� .
Gregory J. Thorpe, Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

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