NC0024970_Permit Modification_19970217

NPDES DOCIMENT SCANNING COVER SHEET
NC0024970
McAlpine Creek WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
A
' ermit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 17, 1997
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State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
February 17, 1997
Mr. J. Reed Atkinson, Superintendent
Charlotte -Mecklenburg Utility Department
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
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Subject: NPDES Permit Modification
NPDES Permit No. NC0024970
McAlpine Creek WWTP
Mecklenburg County
Dear Mr. Atkinson,
On December 13, 1996, the Division of Water Quality received a modification fee of S100.00 (check #563931) and
a request to modify NPDES Permit No. NC0024970, the McAlpine Creek Waste Water Treatment Plant. Accordingly,
we are forwarding herewith the modification to the subject permit. This permit modification is to the effluent
limitations pages. The toxicity testing requirement has been changed from a Chronic Toxicity Phase II test to a
Chronic Toxicity (Ceriodaphnia) P/F test. Part III, Special Condition H which references the (Ceriodaphnia) P/F test
and which was inadvertently modified in the October 4, 1996 modification to the subject permit, will now remain as is.
Please find enclosed the amended limitations pages which should be inserted into your permit. The old pages should
be discarded. All other terms and conditions contained in the original permit remain unchanged and in full effect. This
permit modification is issued pursuant to 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 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 demand is made, this decision shall be final and binding.
If you have any questions concerning these permit modifications, please contact Mary Cabe at telephone number
[phone], extension 518.
Sincerely,
!Preston Howard, Jr., P.E.
cc. Central Files
Mooresville Regional Office
Permits and Engineering Unit
Facility Assessment Unit
Aquatic Survey and Toxicology Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NC0024970
During the period beginning upon EXPANSION ABOVE 48.0 MGD and lasting until expiration, the Permittee is authorized to discharge
from outfall(s) serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Flow
CBOD, 5-Day, 20°C 2 (April 1- Oct. 31)
CBOD, 5-Day, 20°C 2 (Nov. 1 - March 31)
Total Suspended Residue 2
NH3 as N (April 1 - October 31)
NH3 as N (November 1 - March 31)
Dissolved Oxygen 3
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity 4
Conductivity
Discharge Limitations
Monthly Avg. Weekly Avg.
64.0 MGD
4.0
8.0
15.0
1.0
1.9
mg/1
mg/1
mg/1
mg/1
mg/1
6.0 mg/1
12.0 mg/1
22.5 mg/I
200/100 ml 400/100 ml
Monitoring Requirements
Measurement Sample Sample
Daily Max. Frequency Tag_ Location 1
Continuous
Daily
Daily
Daily
Daily
Daily
Daily
Daily
17.0 ug/l Daily
Daily
Monthly
Monthly
Quarterly
Daily
Recording I or E
Composite E, I
Composite E, I
Composite E, I
Composite E
Composite E
Grab E, U, D
Grab E
Grab E
Grab E, U, D
Composite E
Composite E
Composite E
Grab E, U, D
Footnotes:
1 Sample locations: E - Effluent, I - Influent, U - Upstream, D - Downstream. For instream monitoring requirements, see Part III,
Condition G.
2 The monthly average effluent CBOD5 and total suspended residue concentrations shall not exceed 15% of the respective influent value.
3 The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/I.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%. Samples shall be taken quarterly during the months of March, June, September and December; See Part
III, Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be collected at the effluent daily by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0024970
beginning upon EXPANSION ABOVE 48.0 MGD and lasting until expiration (Continued)
Effluent Characteristics Discharge Limitations Monitoring Requirements
Measurement Sample Sample
Monthly Avg, Weekly Avg. Daily Max. Frequency Tvpee Location 1
Cadmium 2.0 ug/1 5.0 ug/1 Weekly Composite E, U, D
Chromium 51.0 ug/1 204.0 ug/1 Weekly Composite E
Nickel 90.0 ug/1 360.0 ug/1 Weekly Composite E
Lindane 2/month Grab E
Copper 2/month Composite E, U, D
Cyanide 5.0 ug/1 15.0 p.g/1 Weekly Grab E
Lead 26.0 ug/1 34.0 ug/1 Weekly Composite E
Silver 2/month Composite E
Zinc 2/month Composite E, U, D
Footnotes:
1 Sample locations: E - Effluent, I - Influent, U - Upstream, D - Downstream. For instream monitoring requirements, see Part III,
Condition G.
2 The monthly average effluent CBOD5 and total suspended residue concentrations shall not exceed 15% of the respective influent value.
3 The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/I.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%. Samples shall be taken quarterly during the months of March, June, September and December; See Part
III, Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be collected at the effluent daily by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0024970
During the period beginning on the effective date of the permit and lasting until EXPANSION ABOVE 48.0 MGD, the Permittee is
authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Measurement Sample Sample
Monthly Avg. Weekly Avg, Daily Max, Frequency Type Location 1
Flow 48.0 MGD Continuous Recording I or E
CBOD, 5-Day, 20°C 2 (April 1 - Oct. 31) 4.0 mg/1 6.0 mg/I Daily Composite E, I
CBOD, 5-Day, 20°C 2 (Nov. 1 - March 31) 8.0 mg/1 12.0 mg/1 Daily Composite E, I
Total Suspended Residue 2 15.0 mg/1 22.5 mg/1 Daily Composite E, I
NH3 as N (April 1 - October 31) 1.0 mg/1 Daily Composite E
NH3 as N (November 1- March 31) 1.9 mg/1 Daily Composite E
Dissolved Oxygen 3 Daily Grab E, U, D
Fecal Coliform (geometric mean) 200/100 ml 400/100 mi Daily Grab E
Total Residual Chlorine 17.0 ug/1 Daily Grab E
Temperature Daily Grab E, U, D
Total Nitrogen (NO2 + NO3 + TKN) Monthly Composite E
Total Phosphorus Monthly Composite E
Chronic Toxicity 4 Quarterly Composite E
Conductivity Daily Grab E, U, D
Footnotes:
1 Sample locations: E - Effluent, I - Influent, U - Upstream, D - Downstream. For instream monitoring requirements, see Part III,
Condition G.
2 The monthly average effluent CBOD5 and total suspended residue concentrations shall not exceed 15% of the respective influent value.
3 The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/1.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%. Samples shall be taken quarterly during the months of March, June, September and December; See Part
III, Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be collected at the effluent daily by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0024970
lasting until EXPANSION ABOVE 48.0 MGD (Continued)
Effluent Characteristics Discharge Limitations Monitoring Requirements
Measurement Sample Sample
Monthly Avg. Weekly Avg. Daily Max. Frequency Type Location 1
Cadmium 2.0 ug/1 5.0 ug/1 Weekly Composite E, U, D
Chromium 51.0 ug/1 204.0 ug/1 Weekly Composite E
Nickel 90.0 ug/1 360.0 ug/1 Weekly Composite E
Lindane 2/month Grab E
Copper 2/month Composite E, U, D
Cyanide 5.0 ug/1 15.0 1.4/1 Weekly Grab E
Lead 26.0 ug/1 34.0 ug/1 Weekly Composite E
Silver 2/month Composite E
Zinc 2/month Composite E, U, D
Footnotes:
1 Sample locations: E - Effluent, I - Influent, U - Upstream, D - Downstream. For instream monitoring requirements, see Part III,
Condition G.
2 The monthly average effluent CBOD5 and total suspended residue concentrations shall not exceed 15% of the respective influent value.
3 The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/1.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%. Samples shall be taken quarterly during the months of March, June, September and December; See Part
III, Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be collected at the effluent daily by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.