NC0020354_Monitoring Plan Review_19971125

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
November 25, 1997
Mr. John Poteat, Superintendent
Town of Pittsboro
PO Box 759
Pittsboro, NC 27312
A3111V
00
74,ij
HNR
Subject: Pretreatment Review of Long (Short) Term Monitoring Plan (LTMP/STMP)
Town of Pittsboro WWTP (NPDES # NC0020354)
Chatham County
Dear Mr. Poteat:
The Pretreatment Unit of the Division of Water Quality has reviewed the Long Term Monitoring Plan
(LTMP) for the Town of Pittsboro. This LTMP was received by the Division on September 8, 1997.
The review indicates that the Town of Pittsboro does not need to follow a long term monitoring plan.
Pittsboro is being developed as a modified pretreatment program by the Division. Therefore, Pittsboro is
only required to develop a short term monitoring plan (STMP). With the following corrections, the
STMP for the Town of Pittsboro meets the requirements needed to establish a site-specific Headworks
Analysis (HWA). Proper implementation of an STMP is also required by Part III (B), of your NPDES
permit. Please refer to the Comprehensive Guidance for North Carolina Pretreatment Programs
(Comprehensive Guide) for additional information and examples and remember:
1. Sampling Frequency:
The Town of Pittsboro should follow the schedule of sampling outlined below instead of that
outlined in the draft LTMP:
Location
Frequency (Within 1
Year Before HWA)
Influent
4 Consecutive Workdays
Effluent
4 Consecutive Workdays
Activated Sludge
Once
Sludge
Per 503 Permit
SIUs
Per SIU Permits
The Town of Pittsboro is only required to sample influent, effluent, and activated sludge basin
within one year of HWA. This sampling should be completed before May 1, 1998, for the HWA
that is due June 1,199806emodify your LTMP to make it follow the model STMP.
TGi` ill
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] Fax [phone]
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Thank you for your cooperation with the Pretreatment Program. If you have any questions or concerns, please
feel free to call Melanie Bryson at [phone] (ext. 595), or Tom S. Poe, Supervisor of the Pretreatment
Unit.
Sincerely,
e�r
Melanie Bryson, E.I.T.
Pretreatment Staff
MDB:Pitt. STMP.01
Cc:, Central Files
Pretreatment Unit
Danny Smith, Raleigh Regional Office
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] Fax [phone]
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