NC0000311_Modification of Permit_20011005

i
OF W Al' c Michael F. Easley
Governor
O� 5 ©D NR William G. Ross,Jr., Secretary
+ North Carolina Department of Environment and Natural Resources
0 'C Gregory J.Thorpe, Ph.D.,Acting Director
Division of Water Quality
October 5,2001
Mr.Edwin E.Morrow
M-B Industries,Inc.
P.O.Box 1118
Rosman,North Carolina 28772
Subject: Modification of NPDES Permit
Permit NC0000311
M-B Industries,Inc.
Transylvania County
Dear Mr.Morrow:
On April 2,2001,a final permit for the subject facility became effective. On August 14,2001,you submitted a
request that the monitoring frequency be reduced to monthly for a number of effluent parameters. The Division has
reviewed your facility's compliance data and determined that it is appropriate to reduce the monitoring frequency
for copper,nickel,silver and cadmium to monthly. Due to some high effluent levels of lead, zinc,chromium and
cyanide,the monitoring for these parameters shall remain at twice monthly. If you would like to re-submit this request
once 10-12 new data points have been collected for these parameters, the Division can re-evaluate the possibility of
reducing the monitoring frequency on lead,zinc,chromium and cyanide.
Please find enclosed the revised permit pages. The revised pages should be inserted into your permit. The old
pages may then be discarded. All other terms and conditions contained in the original permit remain unchanged and in
full effect. This permit modification is issued under the requirements of North Carolina General Statutes 143-215.1 and
the Memorandum of Agreement between North Carolina and the U.S.Environmental Protection Agency.
If any parts,measurement frequencies or sampling requirements contained in this permit modification are unacceptable
to you,you have the right to an adjudicatory hearing upon written request within thirty(30)days following receipt of this letter.
This request must be a written petition conforming to Chapter 150B of the North Carolina General Statutes,filed with the Office
of Administrative Hearings(6714 Mail Service Center,Raleigh,North Carolina 27699-6714). Unless such demand is made,this
decision shall be final and binding.
If you have any questions concerning this permit modification,please contact Natalie Sierra at(919)733-5083,
extension 551.
Sincerely,
A417:14-.//
Gregory J.Thorpe
cc: Asheville Regional Office/Water Quality Section
NPDES Unit
Central Files
Point Source Compliance and Enforcement Unit
N.C.Division of Water Quality/NPDES Unit Phone:[phone]
1617 Mail Service Center,Raleigh,NC 27699-1617 fax:[phone]
Internet:h2o.enr.state.nc.us DENR Customer Service Center:1 800 623-7748

Permit NC0000311
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER 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,
M-B Industries, Inc.
is hereby authorized to discharge wastewater from a facility located at the
M-B Industries Wastewater Treatment Plant
U.S. Highway 64
West of Rosman
Transylvania County
to receiving waters designated as the West Fork French Broad River in the French
Broad River Basin .
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective November 1, 2001.
This permit and authorization to discharge shall expire at midnight on August 31, 2005.
Signed this day October 5, 2001.
4.11.;L t
ie
gory J. Thorpe, Ph. , Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0000311
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001 -METAL FINISHING. Such discharges shall be limited and
monitored by the Permittee as specified below:
'EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Average Daily Maximum Measurement Sample Type Sample
Frequency Locations
Flow 0.030 MGD Weekly Instantaneous Influent or Effluent
Total Suspended Solids 31.0 mg/L 60.0 mg/L Weekly Grab Effluent
Oil and Grease 26.0 mg/L 52.0 mg/L Weekly Grab Effluent
Phenols 2/Month Grab Effluent
Temperature(°C)2 Weekly Grab Effluent,
Upstream,
Downstream
Total Toxic Organics(TTO)3 2.13 mg/L . 2/Month Grab Effluent
Acute Toxicity's Quarterly Composite Effluent
Cadmium 0.240 mg/L Monthly Grab Effluent
Chromium 1.71 mg/L 2.77 mg/L 2/Month Grab Effluent
Nickel 2.38 mg/L 3.98 mg/L Monthly Grab Effluent
Copper 2.07 mg/L 3.38 mg/L Monthly Grab Effluent
Cyanide 0.65 mg/L 1.20 mg/L 2/Month Grab Effluent
Lead 0.43 mg/L 0.69 mg/L 2/Month Grab Effluent
Silver 0.24 mg/L 0.43 mg/L Monthly Grab Effluent
Zinc _ 1.48 mg/L 2.61 mg/L 2/Month Grab Effluent
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units
and shall be monitored weekly at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
1 Sample Locations: Upstream—Upstream 50 feet, Downstream—Downstream 50 feet.
2 The temperature of the effluent shall be such as not to cause an increase in the temperature of the
receiving stream of more than 0.5°C and in no case cause the ambient water temperature to exceed
20°C.
3 In lieu of monitoring for TTO, the permittee may submit the following certification statement: Based
on my inquiry of the person or persons directly responsible for managing compliance with the permit
limitation for total toxic organics, I certify that, to the best of my knowledge and belief, no dumping of
concentrated toxic organics into the wastewater has occurred since the filing of the last discharge
monitoring report.
4 Whole Effluent Toxicity will be assessed using the Acute Toxicity (Fathead Minnow) Pass/Fail at
90% test. See part A.(4.).