NC0069841_Permit (Modification)_19960503

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
May 3, 1996
Mr. Mike Shalati
Post Office Box 987
Monroe, North Carolina 28110
Ariel I IC: I rg 1,1
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Subject: Permit Modification
NPDES Permit # NC0069841
Crooked Creek WWTP #2
Union County
Dear Mr. Shalati:
On September 25, 1995, the Division of Environmental Management issued NPDES Permit No.
NC0069841 to Union County . Based on an April 18, 1996 letter from Mr. Jimmy Gordon. th,
monitoring location for the North Fork Crooked Creek has been changed from 500 feet above the outfialI to
50 feet above the outfall. Effluent sheets have been modified to reflect this change. Please insert the
enclosed effluent sheets and discard the old pages. This permit modification becomes effective
immediately.
All other terms and conditions in the original permit remain unchanged and in full effect. These
modifications are issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated
December 6, 1983.
If this modification is 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 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 11666, Raleigh, North Carolina 27604. Unless
such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit, please contact Mr. Greg Nizich at telephone
number 919/733-5083, extension 541.
Sincerely,
�fi> t/7i - -
. Preston Howard, Jr., P.E.
cc: Mooresville Regional Office
Central Files
NPDES File
Instream Assessment Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

A. (). EFFLUENT LIMITATI+ )NS AND MONITORING REQUIREMENTS SUMMI R April 1 - October 31) Permit No. NC0069841
During the period beginning upon EXPANSION ABOVE 1.0 MGD and RELOCA I Ic )N OF THE DISCHARGE to North Fork Crooked Ceek
and lasting until expiration:. the Permittee is authorized to discharge from outfall(s) .en al number 001. Such discharges shall be limited and
monitored by the permitteu as ,pecified below:
Effluent Characteristic Discharge
Limitation;
Monthly Avq Weekly Avq.
Flow 1.9 MGD
'/ BOD, 5 day, 20°C** 5.0 mg/I
Total Suspended Residue" 30.0 mg/I
,vNH3 asN _2.0 mg/
Dissolved Oxygen ' `oo.f w►J.vw'<,
Fecal Coliform (geometric mean)/ 1,k0: ;, ' 200.0 /100 ml 400.0 /100 ml
Total Residual Chlorine
✓Temperature ; tR j ; 'c fd , /441
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
7.5 mg/I
45.0 mg/I
j_G
Daily Max
17.0 µg/I
Monitoring
Measurement
Frequency
Continuous
.i3/Week
.--3/Week
—3/Week
3/Week
3/Week
3/Week✓
Daily ✓
Monthly.
Monthly
Quarterly
Requirements
Sample *Sample
Type Location
Recording I or
Composite `-E,
Composite E; l
Composite E .--
Grab E, U. D
Grab E, U. D
Grab E
Grab
Composite E
Composite E
Composite E
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet from the outfall, D - Downstream 1/4 mi. below discharge AND at SR
1514. Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July,
August, and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value
(85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1.
**** Chronic Toxicity (Ceriodaphnia) P/F at 90%; February, May, August, And November, See Part III, Condition F.
+ Monitoring data will be reviewed for possible removal of these parameters after collection of 12 samples over a duration of at least 1 year.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored /weelcMt the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (). EFFLUENT LIMITATIP )NS AND MONITORING REQUIREMENTS SUMMJ k April 1 - October 31) Permit No. NC0069841
During the period beginni::g upon EXPANSION ABOVE 1.0 MGD and RELOCA. I'ic )N OF THE DISCHARGE to North Fork Crooked (peel.
and lasting until expiratior . the Permittee is authorized to discharge from outfall(s) :er:al number 001. (Continued)
Effluent Characteristic
6) Conductivity —
Lindane+
1,1 Dichloroethene+
Tetrachloroethene+
Trichloroethene+
Copper
Discharge Limitation:
Units (specify
Monthly Avq Weekly Avq. Daily Max
�[) 3/to k i s i Sip r.
Monitoring
Measurement
Frequency
3/Week
Quarterly
Quarterly
Quarterly
Quarterly
Monthly
Requirements
Sample *Sample
Type Location
Grab U,
Composite E
Grab E
Grab E
Grab E
Composite E

A. (). EFFLUENT LIM 1 FA E'IONS AND MONITORING REQUIREMENTS V. I N. "ER (November 1 - March 31) Permit No. NC0069s41
During the period bcgit:ping upon EXPANSION ABOVE 1.0 MGD and RE:.O, :ATION OF THE DISCHARGE to North Fork Crooked Creek
and lasting until exaira;ion, the Permittee is authorized to discharge from ow lal:(s) serial number 001. Such discharges shall be limited :tnd
monitored by the pcmii :tee as specified below:
Effluent Characteristic Discharge Limitation:
Monthly Avg
Flow 1 .9 MGD
BOD, 5 day, 20°C** 10.0 mg/I
Total Suspended Residue** 30.0 mg/I
NH3asN 4.0 mg/I
Dissolved Oxygen ***
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
Weekly Avg. Daily Max
15.0 mg/I
45.0 mg/I
200.0 /100 ml 400.0 /100 ml
Monitoring Requirements
Measurement Sample 'Sample
Frequency Tug Location
Continuous Recording I or E
3/Week Composite E E. I
3/Week Composite E. I
3/Week Composite E
3/Week Grab E. U, D
3/Week Grab E. U, D
17.0 µg/I 3/Week Grab E
Daily Grab E,U,D
Monthly Composite E
Monthly Composite E
Quarterly Composite E
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet from the outfall, D - Downstream 1/4 mi. below discharge AND at SR
1514. Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July,
August, and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value
(85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1.
**** Chronic Toxicity (Ceriodaphnia) P/F at 90%; February, May, August, And November, See Part III, Condition F.
+ Monitoring data will be reviewed for possible removal of these parameters after collection of 12 samples over a duration of 1 year minimum.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (). EFFLUENT LIMI FA rIONS AND MONITORING REQUIREMENTS WIN' 'ER (November 1 - March 31) Permit No. NC0069'W
During the period be gi t i ping upon EXPANSION ABOVE 1.0 MGD and RE i .O' 'ATION OF THE DISCHARGE to North Fork Crooked Creek
and (Continued)
Effluent Characteristic
Conductivity
Lindane+
1,1 Dichloroethene+
Tetrachloroethene+
Trichloroethene+
Copper
Discharge Limitation:
Units (specify
Monthly Avq Weekly Avq. Daily Max
Monitoring
Measurement
Frequency
3/Week
Quarterly
Quarterly
Quarterly
Quarterly
Monthly
Requirements
Sample
Type
Grab
Composite
Grab
Grab
Grab
Composite
*Sarno le
Location
U, D
E
E
E
E
E