NC0086690_Correspondence_20040225

Heater 202 MecaCourt
Cary, North
N Carolina 27511
Al \ phone:77854
Utilities
fa: 919.460.1.460.1788
;..
WATE0. AND WASTEWATER SEFVICEi P.O. Drawer 4889, Cary, NC 27519
February 25, 2004
Mr. Charles Weaver
N.C. Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Nitrogen Monitoring on Well Water Filter Backwash Facilities
Dear Charles:
Enclosed please find the limits pages for the following NPDES permits
for discharge of filtered backwash water from community wells owned by Heater
Utilities, Inc. (Heater).
System Permit No.
Hollybrook NC 0082996
Nottingham Forest NC 0055701 :n ^�q04
Oak Hollow NC 0073679
Stanstead NC 0086690 a
Waterfall Plantation NC 0085863
Each of the limits pages requires monitoring of Total Nitrogen. and its
components (NO2 + NO3) and (TKN) on a semi-annual basis, which we believe is
appropriate. The limits page also requires Heater to monitor and report the
calculated value of Total Nitrogen load in pounds per month on a monthly
basis.
I assume this means that Heater can perform the tests in January and
June of each year and use this concentration to calculate the results in each
of the six months following the sample.
Unless otherwise instructed, this is the method Heater will use to
report the monthly Total Nitrogen load and add the 12 monthly results to
obtain the annual load.

Page Two
Mr. Charles Weaver
February 25, 2004
Please advise if I need to make any changes to Heater's reporting.
Sincerely,
hA 1-05/
iH. Tweed
President
JHT/rt
cc: Ken Schuster

Permit NCO086690
:54q r_.54e, �
A. (1.) EFFLUENT LINIITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored
by the Permittee as specified below for each outfall:
Effluent.
Characteristics
=
.
LIMITS _
MONITORING REQUIREMENTS=
Monthly
Average
Daily
: Maxlmum
Measurement..
Frequency
Sample Type
Sample Location
Flow
Monthly
Estimate
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
Quarterly
Grab
Effluent
Settleable Solids
0.1 mVL
0.2 mVL
Quarterly
Grab
Effluent
Iron
Quarterly
Grab
Effluent
Total Residual Chlorine'
17 Ng/L
Quarterly
Grab
Effluent
Turbidity
50 NTU
Quarterly
Grab
Effluent
Total Nitrogen (TN) 2
Monitor & Report (mg/L)
Semi-annually
Grab
Effluent
Total Monthly Flow 2
Monitor & Report
milliongallons/month)
Monthly
Calculated
Effluent
Nitrate/Nitrite Nitrogen2
(NO2 + NO3)
Monitor & Report (mg/L)
Semi-annually
Grab
Effluent
Total Kjeldahl Nitrogen (TKN)2
Monitor & Report (mg/L)
Semi-annually
Grab
Effluent
TN load (pounds/month) 2
Monitor & Report
(pounds per month
Monthly
Calculated
Effluent
TN load (pounds/year) 2
Monitor & Report
(pounds per ear
Annually
Calculated
Effluent
Total Phosphorus
Monitor & Report (mg/L)
Semi-annually
Grab
Effluent
Footnotes:
1. Limit takes effect May 1, 2005. Permittee will monitor TRC until the limit takes effect.
2. See A. (2) for Total Nitrogen monitoring and reporting requirements.
All samples collected should be from a representative discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.