NC0050105_Effluent Flow Meter_20100914

INN -SON A. LACY, COMMISSIONER
TERRI UNION, COMMISSIONER
LUIS J. OLIVERA, COMMISSIONER
MICHAEL G. LALLIER, COMMISSIONER
STEVEN K. BLANCHARD, CEO/GENERAL MANAGER
PUBLIC WORKS COMMISSION
OF THE CITY OF FAYETTEVILLE
ELECTRIC & WATER UTILITIES
September 14, 2010
Belinda Henson
North Carolina Department of
Environment and Natural Resources
Division of Water Quality
225 Green Street, Suite 714
Fayetteville, North Carolina 28301-0707
SUBJECT: Effluent Flow Meter Issue
NPDES # NC0050105
Rockfish Creek WRF, Cumberland County
Dear Mrs. Henson:
955 OLD WILMINGTON RD
P.O. BOX 1089
FAYETTEVILLE, NORTH CAROLINA 28302 1089
TELEPHONE [phone]
W W W.FAYPWC.COM
SEP 2 0.2010
0 NQ
This letter is a follow up to our phone conversation concerning an issue with the effluent
flow meter at the Rockfish Creek WRF. Dating back to the beginning of the calendar year we
have seen an inexplicable increase in the average daily effluent flow. During this period the
effluent meter was calibrated quarterly and had checked properly during each calibration check.
Upon further investigation it was determined that the meter's temperature compensator had
failed and as result the meter would intermittently give incorrect flow readings. During this
period, the flows reported on the DMR's have been approximately 9 % higher than the actual
effluent average flow. The percentage is based on comparisons we made using actual staff gauge
readings compared to the readings from the flow meter. A new effluent meter has been installed,
properly calibrated, and has been in service since late August.
If you have any questions concerning this letter please do not hesitate to contact me at
[phone].
cc: Mick Noland
Dickie Vinent
Sincerely,
Public Works Commission
Wendell C. Baxley
Rockfish Creek WRF Supervisor
BUILDING COMMUNITY CONNECTIONS SINCE 1905
AN EQUAL EMPLOYMENT OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER